To see the other types of publications on this topic, follow the link: Particle Size Analysis (PSA).
Journal articles on the topic 'Particle Size Analysis (PSA)'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Particle Size Analysis (PSA).'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Dodds, J., G. Rasteiro, B. Scarlett, R. Weichert, and R. Williams. "From Particle Size Analysis (PSA 1970) to Particulate Systems Analysis (PSA 2003)." Chemical Engineering Research and Design 82, no. 12 (2004): 1533–40. http://dx.doi.org/10.1205/cerd.82.12.1533.58040.
Full text
2
Khanam, Taslima, Wan Nur Syuhada Wan Ata, and Ahmad Rashedi. "Particle Size Measurement in Waste Water Influent and Effluent Using Particle Size Analyzer and Quantitative Image Analysis Technique." Advanced Materials Research 1133 (January 2016): 571–75. http://dx.doi.org/10.4028/www.scientific.net/amr.1133.571.
Full textAbstract:
Wastewater originated from domestic or industry use need to be treated before discharge it to the environment. Particle size is one of the parameter that determine efficient operation of wastewater treatment plant. The present work conducts a comparative study of non-imaging and imaging based particle size analysis tools to analyze the limitations and advantages of using such equipment. The study utilizes particle size analyzer (PSA) as non-imaging tool and light microscope as imaging tool to determine particle sizes in various waste water samples. For this analysis domestic wastewater influent and effluent are analyzed with both techniques. In addition, palm oil mill effluent (POME) has also been analyzed after Fenton process to compare the particle size using these tools. PSA shows most of the particles in the influent and effluent are in the size range of 100 to 700 μm, while microscopy shows additional information of aggregates structure in POME sample showing promising possibility of identifying complex structure of aggregates present in the sample.
3
Aparna Singh, Charu Katare, and Varsha Nigam. "Analysis of Lepidium sativum L. (Garden cress) seed mucilage: A comprehensive characterization using XRD, DSC, and PSA techniques." GSC Biological and Pharmaceutical Sciences 30, no. 3 (2025): 174–81. https://doi.org/10.30574/gscbps.2025.30.3.0102.
Full textAbstract:
crystallinity and thermal stability, of Lepidium sativum seed mucilage using particle size analysis (PSA), X-ray diffraction (XRD), and differential scanning calorimetry (DSC) characterization. Method: The mucilage extracted from Lepidium sativum seeds was obtained by utilizing distilled water as a solvent, followed by precipitation with 95% ethanol to isolate the mucilage effectively. To assess the size distribution and average particle size of the extracted mucilage, a Particle Size Analysis (PSA) was conducted. Crystallinity and crystal characteristics were investigated using X-ray Diffraction (XRD), which provided insights into the nature of the mucilage and detailed the size of its crystallites. Additionally, thermal stability was analyzed through Differential Scanning Calorimetry (DSC). Results: The particle size distribution analysis results illustrated a range of particle sizes: 25% of the particles measured at 169.68 µm. In contrast, the median size (50th percentile) was determined to be 292.50 µm, and 75% of the particles reached a size of 408.64 µm. The average particle size was calculated to be 259.89 ± 0.24 nm, indicating a relatively fine particle size distribution. The average size of the crystallites calculated from the XRD data was found to be 47.47 nm, confirming the presence of crystalline regions within the mucilage. The DSC analysis provided a detailed thermogram, revealing two distinct thermal events: an endothermic peak recorded at 68.24 ºC, and an exothermic peak at 268.86 ºC. Furthermore, the latent heat of fusion was quantified at -161.86 J/g for the endothermic transition and 38.17 J/g for the exothermic transition. Conclusion: The Particle Size Analysis (PSA) and X-ray Diffraction (XRD) revealed that L. sativum mucilage has an average particle size of 259.89 nm and a partially crystalline structure. Differential Scanning Calorimetry (DSC) showed a melting point of 68.24 ºC and decomposition at 268.86 ºC, indicating thermal stability with latent heats of -161.86 J/g and 38.17 J/g, respectively.
4
Mays, M. D., W. D. Nettleton, R. S. B. Greene, and J. A. Mason. "Dispersibility of glacial loess in particle size analysis, USA." Soil Research 41, no. 2 (2003): 229. http://dx.doi.org/10.1071/sr02035.
Full textAbstract:
Silt- to sand-size clay aggregates are absent or relatively rare in unweathered glacial loesses, but dominant in parna where they resist dispersion in particle size analysis (PSA). There are reports that some aggregates in glacial loesses also resist dispersion. However, one would expect freeze-dried aggregates to have mostly edge-to-face orientation of the platy clays and to be easily dispersed in PSA. We test this hypothesis in this paper. We selected Midwest and Alaskan soils formed in late-Pleistocene loess derived from glacial outwash and floodplains beyond the late-Pleistocene glacial boundary. Analytical methods are those in use by the National Soil Survey Laboratory. Soil A and B horizons dispersed well as shown by the 1.5 MPa water to clay ratios of <0.6. In the C horizon, silt-size, rounded, compound particles (aggregates) were few to common and randomly distributed. A few were volcanic glass. Other aggregates consisted of carbonates or layer silicates. Layer silicate aggregates dispersed well in PSA, as hypothesised; Fe and carbonate cemented aggregates did not. Most of these dispersed when given an ultrasonic dispersion treatment.
5
Rhee, Hakjun, Randy B. Foltz, James L. Fridley, Finn Krogstad, and Deborah S. Page-Dumroese. "An alternative method for determining particle-size distribution of forest road aggregate and soil with large-sized particles." Canadian Journal of Forest Research 44, no. 1 (2014): 101–5. http://dx.doi.org/10.1139/cjfr-2013-0327.
Full textAbstract:
Measurement of particle-size distribution (PSD) of soil with large-sized particles (e.g., 25.4 mm diameter) requires a large sample and numerous particle-size analyses (PSAs). A new method is needed that would reduce time, effort, and cost for PSAs of the soil and aggregate material with large-sized particles. We evaluated a nested method for sampling and PSA by comparing it with the methods that follow the American Association of State Highway and Transportation Officials (AASHTO) standard T88-00 and the American Society for Testing and Materials (ASTM) standard D422-63. Using 33 forest road aggregate samples from the Clearwater National Forest in northern Idaho, the nested method required much less laboratory time and effort and resulted in similar PSA values, except for the 0.149 mm (No. 100) sieve, where the smallest particle-size fraction (PSF) values (1.30% and 1.39%) were observed. The nested method shows great potential for determining PSDs of the soil and aggregate material with large-sized particles and should be tested on other forest soils and road aggregates. The nested sampling and analysis method allows for the same number of samples to be collected but requires less laboratory time, making it more efficient and economical for testing the soil and aggregate material with large-sized particles such as forest road aggregate.
6
Febriana, E., E. Angelina, W. Mayangsari, et al. "The effect of using solvent medium in the ultrasonication of silica precipitates." Journal of Physics: Conference Series 2190, no. 1 (2022): 012008. http://dx.doi.org/10.1088/1742-6596/2190/1/012008.
Full textAbstract:
Abstract In this study, further processing of silica precipitated from sodium silicate was carried out using an ultrasonic transducer. The ultrasonication process was carried out with the aim to obtain smaller particles and uniform distribution of silica precipitated. The ultrasonication process was carried out using three solvents medium in water, ethanol, and ethylene glycol. The effect of solvents used on the distribution and particle size of silica precipitated was observed using Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX) and Particle Size Analyzer (PSA). From the results of observations using FE-SEM, it was shown that the ultrasonication of silica precipitates with water has the greatest influence on particle size and distribution. While the analysis using PSA did not show any size reduction due to the agglomeration between the particles. The smallest particle size that could be obtained from this process is about 17 nm with average value of 88 nm.
7
Mori, Yasushige, Hideto Yoshida, and Hiroaki Masuda. "Particle Size Analysis by Laser Diffraction Method Using Reference Particles." Advanced Materials Research 508 (April 2012): 33–37. http://dx.doi.org/10.4028/www.scientific.net/amr.508.33.
Full textAbstract:
The particle size analysis (PSA) by laser diffraction (LD) method can be used for monitor or control of particulate process, because it has the advantages of shorter measurement time and good repeatability, and a variety of commercial instruments is available. However particle size distribution (PSD) measured by LD method depends a great deal on not only optical detector configuration and calculation procedure but also on the system of sample loading into the measuring zone. From this fact, the validation of PSA by LD method should be done using reference particles (RP), whose size distribution is better to have a range over one decade of size, according to ISO 13320-1. For this purpose, the Association of Powder Process Industry and Engineering, Japan (APPIE) distribute the spherical barium titanate glass particles as RP of JIS Z 8900-1, whose size ranges are 1 - 10 µm (MBP 1 - 10), 3 - 30 µm (MBP 3 - 30) and 10 - 100 µm (MBP 10 - 100). This paper shows why LD method needs to check its performance by using RP, and then reports the results of the round robin test of two kinds of RP (MBP 1 - 10 and MBP 10 - 100) and silica RP candidate with 0.1 1.0 µm size measured by LD instruments, which was conducted by the Technical Group of Measurement and Control in APPIE. PSD results measured by LD instruments were almost same as each other for both RP samples. MBP 1 - 10 sample was well dispersed in water without detergent, but a few drops of detergent sometimes needed for dispersing MBP 10 - 100 sample. For MBP 1 - 10 sample, PSD by LD method was slightly smaller than that measured by scanning electro microscopy (SEM) or electro sensing zone (ESZ) methods. For MBP 10 - 100 sample, PSD by LD method agreed well with that by SEM or ESZ methods. Silica sample can be supplied to the users as the dry powder, which can be re-dispersed in water with small amount of surfactant. From the results of the round robin test using silica sample, PSD measured by LD method roughly agreed with EM method.
8
Lim, Hyeon Ha, Seung Ho Lee, Hyung Mi Lim, and Dae Sung Kim. "Preparation of ZnO Nanosol Dispersed in Aqueous Medium and its Dispersion Characteristics." Applied Mechanics and Materials 481 (December 2013): 66–71. http://dx.doi.org/10.4028/www.scientific.net/amm.481.66.
Full textAbstract:
Highly dispersed ZnO nanosol, having an average particle size of about 40nm based on Particle Size Analysis (PSA), was prepared under aqueous solution without the removal of large particles by centrifugation. The ZnO nanosol was investigated on the effect of various dispersion parameters, i.e. milling time, dispersant content, pH, etc. The nanosol was effectively dispersed at 20~30 wt% of dispersant amount compared to ZnO content under ball-milling for 10 hours at pH 10. The dispersion characteristic of the nanosol was investigated into particle size and zeta potential. We discussed on the dispersion behavior of (-) charged ZnO particle surrounded by dispersant together with the variation of (-) charged dispersant's amount in aqueous medium at pH 10. The ZnO powder and nanosol were characterized by SEM, TEM, TGA, FT-IR, PSA and Zeta-potential.
9
Turben, Tanner, Pedro Diaz-Romero, and Andrew Braham. "Establishing Particle Size Recommendations for Cationic Asphalt Emulsions." Construction Materials 5, no. 2 (2025): 26. https://doi.org/10.3390/constrmater5020026.
Full textAbstract:
Asphalt emulsions are used in flexible pavement maintenance and rehabilitation treatments. Emulsion specifications for material characterization are based on testing methodology dating to the 1930s. Newer test methods, including particle size analysis (PSA) of binder droplets in emulsion, have been explored but not implemented into specifications. The objective of this study is to observe the particle size and performance of cationic slow-setting (CSS) emulsions and establish baseline particle size recommendations for cationic emulsions. Four physical property tests (residue, oversize particles, viscosity, and particle size) and two cold mix asphalt performance tests (indirect tensile strength (IDT) and direct shear test (DST)) were conducted on two emulsions (CSS-1 and CSS-1H) over a six-month period. The physical properties of both emulsions were acceptable, and median particle size of the CSS-1H was approximately 3 microns larger than the CSS-1. The IDT strength and DST shear strength of the CSS-1H were higher than of the CSS-1. Recommendations for particle size were proposed by defining maximum limits on median, d10, d90, and span. It is recommended that the maximum median (d50) size of CSS emulsions is 6.0 microns. Future research is needed to standardize PSA procedures, assess recommendations for a wider range of emulsions, and evaluate applicability of minimum particle size limits.
10
Murti, Cahyaning Fajar Kresna, Malik Anjelh Baqiya, Endarko, and Triwikantoro. "Particle Size Analysis of the Synthesized Al2O3 by Dissolution and Alkali Fusion-Coprecipitation Methods." Key Engineering Materials 860 (August 2020): 128–34. http://dx.doi.org/10.4028/www.scientific.net/kem.860.128.
Full textAbstract:
Particle size analysis of synthesized Al2O3 by dissolution and alkali fusion-coprecipitation methods has been conducted. The formation of nano- or microparticles can be synthesized by the top-down (physically) and bottom-up (chemically) methods. In this study, the commercial alumina (Merck) with the particle size of 63 µm was synthesized through the bottom-up method. The dissolution method was done by reacting to alumina with ammonium hydroxide (NH4OH). The alkali fusion method was carried out by reacting alumina with sodium hydroxide (NaOH) and it obtained by coprecipitation of the alkali fusion product with HCl and NH4OH. The result from both methods were calcined at 600°C. The phase of synthesized Al2O3 was identified by using X-ray diffraction (XRD), whereas the morphology observed using a transmission electron microscope (TEM), and the particle sizes measured by particle sizes analyzer (PSA). The XRD pattern shows the γ-Al2O3 phases with particle sizes of ~33 nm and ~25 nm from TEM observations, while the PSA results revealed agglomerated particles with particle sizes of 1263 nm and 477 nm for the dissolution and alkali fusion-coprecipitation method, respectively. Therefore, both methods can be used to reduce the particle size of γ-Al2O3.
11
Suresh, J., R. Yuvakkumar, M. Sundrarajan, and Sun Ig Hong. "Green Synthesis of Magnesium Oxide Nanoparticles." Advanced Materials Research 952 (May 2014): 141–44. http://dx.doi.org/10.4028/www.scientific.net/amr.952.141.
Full textAbstract:
Nephelium lappaceum L. peels was effectively used for the synthesis of magnesium oxide nanoparticles as a natural ligation agent. The XRD and SEM revealed the crystallinity and spherical morphology of the biosynthesized nanoparticles. The size of the particles was found to be 60-70 nm as deduced from XRD and SEM analysis. The particle size of as-synthesized magnesium oxide powders measured by PSA was approximately 100 nm. The successful formation of magnesium oxide nanoparticles was confirmed employing XRD, SEM-EDX and PSA analysis.
12
Suryanto, Edi, and Mercy R. I. Taroreh. "Effect of Particle Size on Physico-Chemical and Antioxidant Activity of Insoluble Dietary Fiber Powder from Corncob (Zea mays L.)." Asian Journal of Chemistry 34, no. 2 (2022): 324–30. http://dx.doi.org/10.14233/ajchem.2022.22541.
Full textAbstract:
Effects of particles size of dietary fiber powder on the physico-chemical properties and antioxidant activity of corncob were investigated. Corncob was grounded in a regularly mill and grinding characteristics and the particles size were evaluated by particle size analyzer (PSA) using laser diffraction method and Fourier transform infrared (FTIR). The results showed that the insoluble dietary fiber (IDF) powder from corncob had the highest crude fiber content (32.31%) and carbohydrates (55.07%). Spectral analysis shows that the IDF matrix structure does not change after grinding and has three characteristics of absorption spectra at 3433-3425 cm-1 (O-H); 2920 cm-1 (C-H) and 1635 cm-1 (aromatic) in presence of the special structures of polysaccharide and lignin compounds. Particle size analyzer (PSA) results showed that the size of IDF 200 mesh and 80 mesh powder were 63.13 and 260.89 μm, respectively. The insoluble dietary fiber (IDF) significantly shows a decrease in dietary fiber content in line with the reduction in particle size. The IDF powder with a particle size of 63.13 μm showed that highest total phenolic content accompanied with the best antioxidant activity through all antioxidant assays (p < 0.05). This study concluded that the IDF micro-powder particle size exerted influence on physico-chemical properties, dietary fiber, total phenolic and antioxidant activity.
13
Nufus, Tatun Hayatun, Dianta Mustofa Kamal, Gun Gun R Gunadi, Candra Damis Widiawati, Asep Apriana, and Muhammad Todaro. "ANALISIS PENGARUH MEDAN MAGNET TERHADAP UKURAN ATOMISASI BAHAN BAKAR CAMPURAN GASOLINE DAN BIOETANOL." Jurnal Rekayasa Mesin 15, no. 2 (2024): 647–55. http://dx.doi.org/10.21776/jrm.v15i2.1398.
Full textAbstract:
The atomization process plays a very important role because the success or failure of combustion in the combustion chamber is influenced by the size of the liquid fuel mist. The occurrence of good atomization from atomized is determined by the size of the fuel droplets and the size of the nozzle diameter. Reducing the droplet diameter can increase the velocity, which can affect the Reynolds number and cause turbulence effects. The effect of turbulence provides a vortex effect, which enhances the heat transfer process between hot air and fuel particles in the combustion chamber. In this research, the effect of fuel magnetization on droplet size is analyzed. The fuel used is E0, E10, E20, E30, and E100, all types of fuel are channeled through an electromagnetic field of 1500 Gauss. Next, the particle size was tested using a Particle Size Analyzer, Bettersize BeNano 90 Zeta. The result was a decrease in particle size of 8-27%. The particle size measured using the PSA (particle size analysis) tool and theoretical calculations is <10% different. Each tool has an accuracy limit for PSA with a maximum accuracy of around 5%. These results provide initial information that the fuel magnetization process can improve engine performance.
14
Rianna, Martha. "Structure and Particle Size of Nano Carbon Liquid Particle from Palm Oill Mill Effluent using Hydrothermal Method." Journal of Applied Research and Technology 20, no. 2 (2022): 136–41. http://dx.doi.org/10.22201/icat.24486736e.2022.20.2.1813.
Full textAbstract:
Palm Oill Mill Effluent is biomass produced in mill from processing palm oil mill. In this research, the structure and particle size of nano carbon particle from palm oill mill effluent (POME) have been succesfully using hydrothermal method. The characterization structure and particle size conducted by XRD, PSA, FTIR and UV-Vis, respectively. The single crystal of carbon structures in all peaks and average crystal size of 30.58 nm confirmed from XRD analysis. Then, PSA analysis informed that average particle sizes of nano carbon from palm oill mill effluent of 1.153 nm. Both analysis of structure and particle size have indicating of nano size from carbon particle synthesize from palm oil mill effluent. FTIR spectrum confirming that functional groups indicate that nanocarbons have been found in POME samples with luminescence generated from the surface state. The POME solution has been successfully converted into nanocarbon in the presence of blue fluorescence under UV light and has light absorption in the UV region at a peak of ~300 nm based from UV-Vis results.
15
Hoten, Hendri Van. "ANALISIS KARAKTERISASI SERBUK BIOKERAMIK DARI CANGKANG TELUR AYAM BROILER." ROTOR 13, no. 1 (2020): 1. http://dx.doi.org/10.19184/rotor.v13i1.18874.
Full textAbstract:
The research is about analysis of Nano Sized Bioceramic Characterization Using Particle Size Analyzer (PSA). In the previous research, optimization of the parameters of making nano powders on Ball Mill machines using the Taguchi and ANOVA methods. The optimum parameters of the Taguchi Design analysis were grinding rate, grinding time and Ball Powder Ratio respectively 250 rpm, 3 hours and 1: 6. After that the characterization of the powder use a Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). Powder size measurement use SEM tools obtained the smallest average size of 1.305 mm while using TEM tools showed the average size of the smallest powder between 50-100 nm. TEM test results were confirmed again using PSA. The results of the characterization using PSA showed that the particle size in the range 100-300 nm was approximately 80%
16
Nalawati, Ara Nugrahayu, Nugraha Edhi Suyatma, and Danu Indra Wardhana. "SINTESIS NANOPARTIKEL PERAK (NPAg) DENGAN BIOREDUKTOR EKSTRAK BIJI JARAK PAGAR DAN KAJIAN AKTIVITAS ANTIBAKTERINYA." Jurnal Teknologi dan Industri Pangan 32, no. 1 (2021): 98–106. http://dx.doi.org/10.6066/jtip.2021.32.2.98.
Full textAbstract:
The redox analysis as indicated by a change in color from yellow to reddish-brown was measured at the optimum wavelength of 405 nm with the highest redox result of 480 nm obtained in the NPAg-S sample. The optimal absorption wavelength changes according to the characteristics of the NPAg produced, but is generally in the range of 400-500 nm. Analysis of the active groups with the FTIR instrument showed active groups (OH, CH aldehyde, vibrations of CN bonds in the amine group, amide I groups from proteins, and CO double bonds in the 4000-1500 cm-1) zone. Additionally, in the identification zone 1500-600 cm-1 the formation of CN bond vibrations and the presence of an amide I group from the protein was found. Photographs at 10.000 and 15.000x magnification showed that the morphology of the distribution of NPAg in the jatropha seed extract solution was polydisperse and in the form of fibrous balls with non-uniform particles and tended to agglomerate. The distribution and size of the particles measured using the Particle Size Analyzer (PSA) instrument showed that the particle size ranged from 33-116 nm. NPAg-S samples at two concentrations (1 and 2%) showed inhibitory activity for all types of Gram positive and Gram negative bacteria. Analysis of the particle size distribution using PSA showed that the particle size of the NPAg-S sample was 33.8 nm, which was smaller than the NPAg-K sample of 44.8 nm. Antibacterial activity is strongly influenced by the particle size of a sample. Small size silver nanoparticles have a large surface area to interact with bacteria as compared to large silver nanoparticles, thus they can provide a greater antibacterial effect.
17
Ramandhany, Safitry, Djoko Triyono, Eni Sugiarti, Resetiana Dwi Desiati, and Risma Yulita Sundawa. "SYNTHESIS OF NICRALX MICROPARTICLES USING DRY MILLING AND WET MILLING PROCESSES." Metalurgi 38, no. 2 (2023): 41. http://dx.doi.org/10.55981/metalurgi.2023.713.
Full textAbstract:
The characteristics of synthesized NiCrAlY and NiCrAlZr composite powders produced by the milling process were investigated to understand the particle size, the shape of particles, and the properties of crystalline structure. The milling process was carried out by combining dry milling with the wet milling method to prevent agglomeration, produce a homogeneous alloy powder, and reduce the particle size. Ethanol was used during the wet milling process as a process control agent. The PSA (particle size analysis) showed that the particle size was effectively reduced from ±70 μm to less than 30 μm. In addition, surface structure analysis characterized by SEM (scanning electron microscope) revealed that particle shape changed from blocky particles after dry milling into flaky, flattened, and fragmented particles after wet milling. An XRD (x-ray diffraction) was used to identify the phases of powders before and after the mechanical milling process. Crystal structure analysis was calculated from the change of peak broadening in XRD peak spectra. The Williamson-hall method has been performed to calculate the strain and crystallite size of synthesized NiCrAlY and NiCrAlZr composite powder in the present study. The findings in this study show the characteristics of powders, which are important information for producing coatings with good performance.
18
Silveira, Felipe Gomes Frederico da, Luciano da Silva Souza, Laércio Duarte Souza, João de Mendonça Naime, and Carlos Manoel Pedro Vaz. "Estimation of Water Retention Curve for Soils of Bahia, Brazil, Based on Soil Particle-Size Analysis." Journal of Agricultural Science 10, no. 12 (2018): 126. http://dx.doi.org/10.5539/jas.v10n12p126.
Full textAbstract:
Soil water retention curve (SWRC) is an important soil attribute because it is a soil quality indicator and is fundamental to study water dynamics in the soil-plant-atmosphere system. Since the conventional SWRC determination is laborious and time-consuming, making it difficult to process a large volume of samples, pedotransfer functions have been used to estimate it by using other soil physical attributes easily determined. Thus, this study aimed to apply Arya-Paris model to SWRC estimation for soils of Bahia state, Brazil, based on soil particle-size analysis, and to compare estimated and determined data of SWRC. Samples were collected from horizons A and AB and/or B and/or C, for a total of 15 soils and 62 horizons. Particle-size was determined by automatic soil particle-size analyzer (PSA) based on g-ray attenuation and traditional Bouyoucos&rsquo; hydrometer (BH) method. Arya-Paris model showed better SWRC predictions for sandy soils, followed by clayey, loamy, and very clayey soils. Good model performance was observed for all soils together. The &alpha; 1 scaling factor provided better predictions, followed by &alpha; 3, and &alpha; 2 showed unsatisfactory behavior. BH method, using only 7 soil particle-size fractions, gave slightly higher predictions than PSA using 30 soil particle-size fractions.
19
Sun, Yuan, Chuanzhao Zhang, Xianqiang Zhu, Liang Dong, and Xianhang Sun. "Mass and Heat Transfer of Pressure Swing Adsorption Oxygen Production Process with Small Adsorbent Particles." Processes 11, no. 8 (2023): 2485. http://dx.doi.org/10.3390/pr11082485.
Full textAbstract:
Rapid-cycle pressure swing adsorption (PSA) with small adsorbents particles is intended to improve mass transfer rate and productivity. However, the mass transfer mechanisms are changed with reduction of particle size during rapid-cycle adsorption process. A heat and mass transfer model of rapid-cycle PSA air separation process employing small LiLSX zeolite particles is developed and experimentally validated to numerically analyze the effects of mass transfer resistances on the characteristics of cyclic adsorption process. Multicomponent Langmuir model and linear driving force model are employed for characterizing the adsorption equilibrium and kinetic. The results of numerical analysis demonstrate that the dominant mass transfer resistance of small adsorbents particles is a combination of film resistance, axial dispersion effect and macropore diffusion resistance. The oxygen purity, recovery and productivity of the product are overestimated by ~2–4% when the effect of axial dispersion on mass transfer is ignored. As particle size decreases, the front of nitrogen-adsorbed concentration and gas temperature become sharp, which effectively improves the performance. However, the adverse effect of axial dispersion on the mass transfer becomes significant at very small particles conditions. It is nearly identical shapes of nitrogen concentration and gas temperature profiles after adsorption and desorption steps. The profiles are pushed forward near the production end with an increase in bed porosities. The optimal oxygen recovery and productivity are achieved with a particle diameter of 0.45 mm and bed porosity of 0.39 during the PSA process.
20
Anis Sofia, S., Noorasikin Samat, and Meor Yusoff Meor Sulaiman. "Effect of Dispersants on Microstructures of Nano Alpha Alumina Developed from Aluminium Dross Waste." Advanced Materials Research 1115 (July 2015): 378–81. http://dx.doi.org/10.4028/www.scientific.net/amr.1115.378.
Full textAbstract:
This paper compares the effect of dispersants which are Sodium Laureth Sulfate (SLS) and distilled water (DW) on the crystallization, particle size distribution and morphological behavior of nanoalpha Alumina (α-Al2O3) synthesized from Aluminium (Al) dross waste. The synthesizing of nanoα-Al2O3 via wet milling method was performed using a planetary mill for 4 hours at a speed of 550 rpm. The nanoα-Al2O3 powders with dispersants were characterized with x-ray diffraction (XRD), particle size analyzer (PSA) and transmission electron microscopy (TEM). XRD analysis shows the broadening and shifting of peaks after the sample was calcined at 1300 °C, indicating high crystallinity. The crystallite size of α-Al2O3 milled with SLS is also smaller than the α-Al2O3 milled with DW. These results are consistent with the PSA analysis in which the graphs displayed a symmetrical trend. Then, the PSA analysis is validated with TEM observation up to 100000x magnification, particularly for α-Al2O3 milled with SLS.
21
Efendi, Tania Tiara, Dikki Miswanda, M. Pandapotan Nasution, Minda Sari Lubis, and Bambang Hermanto. "Antibacterial Activity of Reduced Silver Leaf Extract of Ketumpang Air (Peperomia pellucida (L.) Kunth) Against Staphylococcus aureus." Indonesian Journal of Science and Pharmacy 1, no. 2 (2023): 64–69. https://doi.org/10.63763/ijsp.v1i2.24.
Full textAbstract:
Silver particles are widely applied in various medical fields, one of which is as an antibacterial. The advantage of silver particles is their small particle size, which increases their antibacterial effect. One of the environmentally friendly methods that can be used to synthesize silver particles is by utilizing extract of daun ketumpang air (Peperomia pellucida (L.) Kunth) through a reduction reaction. The aim of this research was to determine the antibacterial activity of silver particles made using water ketumpang leaf extract against Staphylococcus aureus bacteria. Silver particles were synthesized using the green synthesis method from extract of daun ketumpang air (Peperomia pellucida (L.) Kunth) which acts as a bioreductant. Silver reduction using water ketumpang leaf extract was carried out with varying concentrations of AgNO3 solution of 1 mM, 2 mM, 5 mM, and 10 mM with a ratio between the extract and AgNO3 solution of 1:40. The resulting silver particles were characterized using a Uv-Vis spectrophotometer and particle size analysis using PSA. The antibacterial activity test of the reduced silver particles was carried out against Staphylococcus aureus bacteria using the Kirby-Bauer method. The results of the research showed the formation of silver particles in the form of a change in the color of the solution from yellow to brownish. Analysis using a UV-Vis spectrophotometer showed a maximum wavelength of 423 nm, which indicated that silver particles were formed. The results of PSA analysis show the size of silver particles, where the smallest size of silver is 0.41 μm for a concentration variation of 10 mM. The antibacterial activity test showed strong antibacterial activity against Staphylococcus aureus bacteria with an average diameter of the inhibition zone of 11.48 mm. This shows that ketumpang water leaf extract can be used as a bioreductant in reducing silver particles and the silver particles produced have the potential to be antibacterial.
22
Herdianto, Nendar, Dwi Gustiono, Riesma Tasomara та ін. "Synthesis and Characterization of Mesoporous β-Tricalcium Phosphate". Materials Science Forum 1028 (квітень 2021): 359–64. http://dx.doi.org/10.4028/www.scientific.net/msf.1028.359.
Full textAbstract:
Reconstruction of bone defect due to a disease or a trauma can use autograft, allograft, xenograft or synthetic bonegraft as the bone substitute material. However, in particular cases, it is required a material that has a specific resorption characteristic, beside owning excellent bioactive properties, such as β-tricalcium phosphate (β-TCP). In this study, we report the synthesis of β-TCP particles with mesopores structure by using chitosan and aloe vera as templates. A solution of (NH4)2HPO4 was added dropwise into solution of Ca(NO3)2·4H2O and the template at 85°C for 2 hours, and subsequently aged for 3 hours. Then, the formed precipitate was washed and centrifuged repeatedly prior to drying at 80°C for 24 hours. Finally, the dried precipitate was calcined at 900°C for 1 hour to obtain β-TCP powder. Phase identification and mesopores structure were analyzed using X-ray diffraction (XRD), while the existence of functional groups was identified by Fourier-transform infrared (FTIR) spectroscopy. Microstructure and particle size distribution were characterized by scanning electron microscopy (SEM) and particle size analyzer (PSA), respectively. XRD analysis shows that β-TCP is dominant with the presence of small amount of impurities. Furthermore, low angle peak in XRD analysis indicates the formation of mesopores structure. From the SEM and PSA analysis, the morphology of both TCP-K and TCP-KA particles showed more large agglomerates and more heterogeneous particle size distribution due to the addition of the biopolymers in the synthesis of β-TCP.
23
Cheng, Jian Li, Cun Zhou, Hao Peng, Huan Wang, and Yu Sun. "Synthesis and Characterization of Polyimide/Silica Nanocomposites." Advanced Materials Research 311-313 (August 2011): 96–100. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.96.
Full textAbstract:
Two kind of polyimide/silica nanocomposites which were recorded poly(amic acid)/ silica(PAA/SiO2) and SiO2in poly(amic acid) ammonium salt(PAS/SiO2) respectively, have been prepared for different methods. The size of SiO2in PAA/SiO2and PAS/SiO2are measured by Particle size analysis and the average particle size are 377nm and 53.7nm. Transmission electron microscopy(TEM) images of PAS/ SiO2confirm that the size of particles are ranged from 40 to 80nm. The stuctures of samples have been characterized by FT-IR spectra. The thermal stability of PAA/SiO2and PAS/SiO2are studied by thermogravimetric analysis (TGA) and the thermal behaviors were investigated by differential scanning calorimetry (DSC) in this paper. It is shown that PAA/SiO2have slightly better thermal properties than that of PAS/SiO2. The results obtained from Instron universal strength tester present the water-solube PAS/SiO2own the excellent mechanical prperties as same as PAA/SiO2.
24
Thorburn, PJ, and RJ Shaw. "Effects of different dispersion and fine fraction determination methods on the results of routine particle size analysis." Soil Research 25, no. 4 (1987): 347. http://dx.doi.org/10.1071/sr9870347.
Full textAbstract:
Particle-size analysis (PSA) methods to be used in routine situations need to be rapid, require no prior information about the sample and give precise results over a wide range of soil textures. Effects of three physical dispersion and two fine-fraction determination methods on PSA results were investigated over a wide range of soil textures to find the most appropriate technique for routine PSA. Interactions between physical dispersion and fine-fraction determination methods were also investigated. The reciprocating shaker produced significantly lower silt and fine sand and higher coarse sand (and clay, although not significant) values than either drink mixer or end-over-end shaker dispersions. This result was interpreted as the reciprocating shaker giving the most effective dispersion, with aggregated clay being dispersed to primary particles while coarse sand was not fragmented to fine sand or silt. The end-over-end shaker did not reliably disperse a heavy clay soil, and so cannot be recommended for routine use where similar soils may be encountered. When considered over all soils and dispersion methods, hydrometer clay and clay + silt values were higher than pipette values. These results were due to the effective depth of the hydrometer being greater, on average, than the depth of the pipette. However, there were interactions between dispersion and fine-fraction determination methods for the clay and clay +silt classes. Hydrometer values were greater than pipette values with drink mixer and end-over-end shaker dispersion, but were similar with reciprocating shaker dispersion. For the clay fraction, inferior dispersion given by the drink mixer and end-over-end shaker resulted in a significant mass of particles between the sampling depths of the pipette and hydrometer, causing the higher hydrometer values. For the clay +silt fraction, both drink mixer and end-over-end dispersion methods fragmented sands to a size which was recorded by the hydrometer but not the pipette. These interactions highlighted the requirement for effective dispersion where clay and silt are determined by the hydrometer, and may explain some of the conflicting observations of the precision of the hydrometer compared with the pipette. Reciprocating shaker physical dispersion combined with the hydrometer fine-fraction determination method was found the most appropriate PSA method combination for use in a routine situation.
25
M, Durga, Shilpa P, Priyadharshini I, and Dhanalakshmi S. "Green Synthesis of Silver (Ag) Nanoparticles with Green Tea Leaf, Its Characterization, and Molecular Docking Analysis against Diabetes." Saudi Journal of Biomedical Research 9, no. 06 (2024): 107–17. http://dx.doi.org/10.36348/sjbr.2024.v09i06.002.
Full textAbstract:
The Green synthesis method is proved to be one of the simplest and efficient ways for material synthesis. Silver nanoparticles were synthesized using a green synthesis method, with silver nitrate and green tea leaves as precursors. The sample is then characterized using versatile characterization techniques such as Scanning Electron Microscope (SEM), UV Spectroscopy, Raman Spectroscopy and Particle size analyser (PSA). The PSA pattern has shown that the particles are pure. The surface morphology is obtained through SEM image and it has suggested that nano particles were aggregates. The nanoparticles have shown interactions between silver and oxygen atoms supported by Raman. Molecular docking is a pivotal computational technique widely used in drug discovery to predict the preferred orientation of a ligand as it binds to a receptor's active site. This approach is fundamental to understand molecular interactions at the atomic level, thereby facilitating the design of new drugs by high affinity and specificity. The process involves simulating the interaction between molecules to determine the optimal binding configuration, using algorithms that assess the binding energy and stability of the resulting complex.
26
Sari, Rodiah Nurbaya, N. Nurhasni, and M. Ainul Yaqin. "Green Synthesis Nanoparticle ZnO Sargassum sp. Extract and The Products Charactheristic." Jurnal Pengolahan Hasil Perikanan Indonesia 20, no. 2 (2017): 238. http://dx.doi.org/10.17844/jphpi.v20i2.17905.
Full textAbstract:
The synthesis of zinc oxide (ZnO) nanoparticles is an emerging research area due to its wide range of applications, such as electronics, pharmaceuticals, optics and food packaging. In this study, described <br />the green synthesis of ZnO nanoparticles and their characteristics using Sargassum sp. extract and 0.1 M zinc nitrate as the precursors. The variations include Sargassum sp. extracts volume of 5, 10, and 20<br />mL and the calcination temperature of 400, 500, and 600 oC. The characterization had been done such as the role of Sargassum sp. extract as a reducing agent for Zn2+ → Zn0 confirmed by Fourier Transform <br />Infrared Spectroscopy (FTIR) spectra due to 450-4000 cm-1 wavelength, the size of particles using Particle Size Analyzer (PSA), image and chemical composition using Scanning Electron Microscopy with X-ray microanalysis (SEM-EDS) and crystallinity using ray powder diffraction (XRD) with Cu anode at 1.54187 Å. Analysis with PSA instrument showed that ZnO particle size increased from 607 up to 649 nm along with increasing of extract concentration from 5 up to 20% (v/v). SEM imaging showed the formation of ZnO to be predominantly spherical and EDS data confirmed the existence of zinc and oxygen in the particles obtained. XRD analysis revealed hexagonal crystal system of ZnO nanoparticles and decreased in crystallite size was observed from 31.4 to 14.7 nm with increased in calcination temperature from 400 to 600 oC.
27
Wehner, B., and A. Wiedensohler. "Long term measurements of submicrometer urban aerosols: statistical analysis for correlations with meteorological conditions and trace gases." Atmospheric Chemistry and Physics Discussions 2, no. 5 (2002): 1699–733. http://dx.doi.org/10.5194/acpd-2-1699-2002.
Full textAbstract:
Abstract. Long-term measurements (over 4 years) of particle number size distributions (submicrometer particles, 3--800 nm in diameter), trace gases (NO, NO2, and O3), and meteorological parameters (global radiation, wind speed and direction, atmospheric pressure, etc.) were taken in a moderately polluted site in the city of Leipzig (Germany). The resulting complex data set was analyzed with respect to seasonal, weekly, and diurnal variation of the submicrometer aerosol. Car traffic produced a peak in the number size distribution at around 30 nm particle diameter during morning rush hour on weekdays. A second peak at 10--15 nm particle diameter occurred around noon during summer, confirmed by high correlation between concentration of particles less than 20 nm and the global radiation. This new-particle formation at noon was correlated with the amount of global radiation. A high concentration of accumulation mode particles (between 100 and 800 nm), which are associated with large particle-surface area, might prevent this formation. Such high particle concentration in the ultrafine region (particles smaller than 20 nm in diameter) was not detected in the particle mass, and thus, particle mass concentration is not suitable for determining the diurnal patterns of particles. In summer, statistical time series analysis showed a cyclic pattern of ultrafine particles with a period of one day and confirmed the correlation with global radiation. Principal component analysis (PCA) revealed a strong correlation between the particle concentration for 20 -- 800 nm particles and the NO- and NO2-concentrations, indicating the influence of combustion processes on this broad size range, in particular during winter. In addition, PCA also revealed that particle concentration depended on meteorological conditions such as wind speed and wind direction, although the dependence differed with particle size class.
28
Wehner, B., and A. Wiedensohler. "Long term measurements of submicrometer urban aerosols: statistical analysis for correlations with meteorological conditions and trace gases." Atmospheric Chemistry and Physics 3, no. 3 (2003): 867–79. http://dx.doi.org/10.5194/acp-3-867-2003.
Full textAbstract:
Abstract. Long-term measurements (over 4 years) of particle number size distributions (submicrometer particles, 3-800 nm in diameter), trace gases (NO, NO2, and O3), and meteorological parameters (global radiation, wind speed and direction, atmospheric pressure, etc.) were taken in a moderately polluted site in the city of Leipzig (Germany). The resulting complex data set was analyzed with respect to seasonal, weekly, and diurnal variation of the submicrometer aerosol. Car traffic produced a peak in the number size distribution at around 20 nm particle diameter during morning rush hour on weekdays. A second peak at 10-15 nm particle diameter occurred around noon during summer, confirmed by high correlation between concentration of particles less than 20 nm and the global radiation. This new-particle formation at noon was correlated with the amount of global radiation. A high concentration of accumulation mode particles (between 100 and 800 nm), which are associated with large particle-surface area, might prevent this formation. Such high particle concentration in the ultrafine region (particles smaller than 20 nm in diameter) was not detected in the particle mass, and thus, particle mass concentration is not suitable for determining the diurnal patterns of particles. In summer, statistical time series analysis showed a cyclic pattern of ultrafine particles with a period of one day and confirmed the correlation with global radiation. Principal component analysis (PCA) revealed a strong correlation between the particle concentration for 20-800 nm particles and the NO- and NO2-concentrations, indicating the influence of combustion processes on this broad size range, in particular during winter. In addition, PCA also revealed that particle concentration depended on meteorological conditions such as wind speed and wind direction, although the dependence differed with particle size class.
29
Gunawan, Muhammad, Iis Arifiantini, Ni Wayan Kurniani Karja, Mohamad Agus Setiadi, Ekayanti Mulyawati Kaiin, and Syahruddin Said. "Development of a frozen bovine semen diluent: Comparison of particle size of commercial and home-made diluents." BIO Web of Conferences 162 (2025): 00010. https://doi.org/10.1051/bioconf/202516200010.
Full textAbstract:
A variety of diluents, both homemade and commercial, are used in Indonesian artificial insemination centers to freeze bovine semen. One of the homemade diluents used is Tris egg yolk. The egg yolk is used as a source of lecithin to protect the sperm membrane during freezing. The smaller the lecithin particles, the more effectively they can bind to the cell membrane. In addition, the particle size facilitates the analysis of sperm quality using Computer Assisted Sperm Analysis (CASA). This study aimed to perform particle analysis of lecithin in homemade and commercial diluents using a particle size analyzer (PSA). The diluents used in this study were Tris egg yolk, Andromed (Minitube, Germany), Bovifree (Minitube, Germany), OptiXcell (IMV, France), and BioXcell (IMV, France). The results showed that the Tris egg yolk diluent had the widest particle size range, from 584.5 ± 2.2 to 3255.7 ± 48.84 nm. The smallest commercial diluent was OptiXcell (64.6 ± 2 nm), followed by BioXcell (186.2 ± 2.2 nm), Andromed (245.7 ± 2.8 nm) and Bovifree (278.5 ± 2.5 nm). The sperm kinematics of frozen semen in Tris egg yolk diluent were challenging to analyze. In contrast, the kinematics of semen in commercial dilutions could be visualized and evaluated according to the established criteria. This study’s results indicate that the commercial diluent’s particle size is smaller than that of the homemade diluent and does not affect the results of the CASA assessment. Consequently, developing homemade diluents with a particle size comparable to commercial diluents is essential.
30
Dhage, S. Sagar, D. P. Biradar, Y. R. Aladakatti, S. S. Chandashekhar, and Ravikumar Hosamani. "Green Synthesis and Characterization of Magnesium Oxide Nanoparticles from Leaf Extracts of Amaranthus retroflexus and Azadirachta indica." International Journal of Environment and Climate Change 13, no. 9 (2023): 214–19. http://dx.doi.org/10.9734/ijecc/2023/v13i92225.
Full textAbstract:
Among plant extracts, neem leaf extract was found effective for successful synthesis of MgO nanoparticles. The main phytochemicals present in neem leaf extract acts as reducing and capping agents for synthesis of MgO nanoparticles. The bio reduced MgO nanoparticles were characterized by using surface plasmon resonance analysis (UV–Vis spectroscopy), particle size and distribution analysis (PSA), surface morphology analysis (SEM) and elemental distribution analysis (EDX). The UV–Vis spectral analysis confirmed that the maximum absorption at 279 nm range corresponds to the intrinsic band gap of MgO nanoparticles. Particle size analyzer confirmed synthesized particles are of nanoscale i.e., 48.1 nm. SEM images confirmed synthesized nanoparticles were found to be relatively oval shaped and EDX confirmed peak is of MgO nanoparticles. This is a simple and effective method which could be an alternative for chemical and physical methods for the large-scale production of MgO nanoparticles.
31
Murti, Cahyaning Fajar Kresna, Herman Aldila, Endarko, and Triwikantoro. "Particle Size Analysis of the Synthesised ZrO2 from Natural Zircon Sand with Variation of pH Deposition Using Alkali Fusion-Coprecipitation Method." Materials Science Forum 966 (August 2019): 89–94. http://dx.doi.org/10.4028/www.scientific.net/msf.966.89.
Full textAbstract:
Zirconia (ZrO2) is one of the refractory ceramic materials that have applications in several fields. The aim of this study was to synthesis ZrO2 from natural zircon sand collected from Kereng Pangi, Central Kalimantan with a variation of pH deposition using alkali fusion co-precipitation method. The synthesized ZrO2 began with the preparation process involved magnetic separation, milling, and leaching with HCl. Furthermore, the alkali fusion process was used KOH solution and heated in an electrical furnace at 700°C for 3 h whereas the co-precipitation process was carried out using a filtrate mixed with the NH4OH solution to reach a pH variation between 3–11 and then precipitated for 12 h. The precipitates were dried in an oven and then calcined at 800°C for 3 h. The structure of synthesized ZrO2 was characterized using XRD and the particle sizes were measured using particle size analyzer (PSA). The XRD analysis showed that the identified phase of zirconia powder is tetragonal with a crystal size in nanometer size. Result of PSA measurement revealed that the crystal size decreased in the range pH of 3 - 7, but increased in the range pH of 7 - 11. The biggest powder particle size could be achieved at 260 nm with pH 7 whereas the smallest size was at 143 nm occurred at pH 3.
32
Trivedi, Mahendra Kumar, Alice Branton, Dahryn Trivedi, Gopal Nayak, Rakesh Kumar Mishra, and Snehasis Jana. "Characterization of Physical, Thermal and Spectral Properties of Biofield Treated Date Palm Callus Initiation Medium." International Journal of Nutrition and Food Science 4, no. 6 (2015): 660–68. https://doi.org/10.11648/j.ijnfs.20150406.20.
Full textAbstract:
The date palm is mainly cultivated for the production of sweet fruit. Date palm callus initiation medium (DPCIM) is used for plant tissue culture applications. The present work is intended to evaluate the impact of Mr. Trivedi’s biofield energy treatment on physical, thermal and spectral properties of the DPCIM. The control and treated DPCIM were evaluated by various analytical techniques such as X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectroscopy, particle size analyzer (PSA), surface area analyzer and ultra violet-visible spectroscopy (UV-vis) analysis. The XRD analysis revealed a decrease in intensity of XRD peaks of the treated sample as compared to the control. The crystallite size of the treated DPCIM (81.02 nm) was decreased with respect to the control sample (84.99 nm). The DSC analysis showed a slight decrease in melting temperature of the treated sample. Additionally, the latent heat of fusion of treated sample was changed by 45.66% as compared to the control sample. The TGA analysis showed an increase in onset degradation temperature of the treated sample (182ºC) as compared to the control sample (142ºC). This indicated the increase in thermal stability of the treated DPCIM. PSA results demonstrated an increase in average particle size (d50) and size showed by 99% of particles (d99) by 19.2 and 40.4%, respectively as compared to the control sample. The surface area analyzer showed a decrease in surface area of treated DPCIM by 13.4%, which was well supported by the particle size results. UV spectra of the treated sample showed the disappearance of absorption peak 261 nm in treated sample as compared to the control. Overall, the result showed that biofield energy treatment has a paramount influence on physical, thermal and spectral properties of DPCIM. Therefore, it is assumed that biofield treated DPCIM could be used as a better medium for plant tissue culture applications. <strong>Source:</strong> https://www.trivedieffect.com/science/characterization-of-physical-thermal-and-spectral-properties-of-biofield-treated-date-palm-callus-initiation-medium http://www.sciencepublishinggroup.com/journal/paperinfo?journalid=153&doi=10.11648/j.ijnfs.20150406.20
33
Trivedi, Mahendra Kumar, Alice Branton, Dahryn Trivedi, Gopal Nayak, Rakesh Mishra, and Snehasis Jana. "Characterization of Physical, Thermal and Spectral Properties of Biofield Treated Date Palm Callus Initiation Medium." International Journal of Nutrition and Food Science 4, no. 6 (2015): 660–68. https://doi.org/10.5281/zenodo.192200.
Full textAbstract:
The date palm is mainly cultivated for the production of sweet fruit. Date palm callus initiation medium (DPCIM) is used for plant tissue culture applications. The present work is intended to evaluate the impact of Mr. Trivedi’s biofield energy treatment on physical, thermal and spectral properties of the DPCIM. The control and treated DPCIM were evaluated by various analytical techniques such as X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectroscopy, particle size analyzer (PSA), surface area analyzer and ultra violet-visible spectroscopy (UV-vis) analysis. The XRD analysis revealed a decrease in intensity of XRD peaks of the treated sample as compared to the control. The crystallite size of the treated DPCIM (81.02 nm) was decreased with respect to the control sample (84.99 nm). The DSC analysis showed a slight decrease in melting temperature of the treated sample. Additionally, the latent heat of fusion of treated sample was changed by 45.66% as compared to the control sample. The TGA analysis showed an increase in onset degradation temperature of the treated sample (182ºC) as compared to the control sample (142ºC). This indicated the increase in thermal stability of the treated DPCIM. PSA results demonstrated an increase in average particle size (d50) and size showed by 99% of particles (d99) by 19.2 and 40.4%, respectively as compared to the control sample. The surface area analyzer showed a decrease in surface area of treated DPCIM by 13.4%, which was well supported by the particle size results. UV spectra of the treated sample showed the disappearance of absorption peak 261 nm in treated sample as compared to the control. Overall, the result showed that biofield energy treatment has a paramount influence on physical, thermal and spectral properties of DPCIM. Therefore, it is assumed that biofield treated DPCIM could be used as a better medium for plant tissue culture applications. https://www.trivedieffect.com/science/characterization-of-physical-thermal-and-spectral-properties-of-biofield-treated-date-palm-callus-initiation-medium http://www.sciencepublishinggroup.com/journal/paperinfo?journalid=153&doi=10.11648/j.ijnfs.20150406.20
34
Danjuma Sani, Mahadi, Nagendra Kumar V. D. Abbaraju, Venugopal V. S. Nutulapati, and Nura Kura Umar. "Removal of ethylene bisdithiocarbamate fungicides in wastewater and agricultural runoff by zinc oxide nanoparticles before analysis by HPLC and UV-Vis spectroscopy." Analytical Methods in Environmental Chemistry Journal 6, no. 04 (2023): 93–106. http://dx.doi.org/10.24200/amecj.v6.i04.251.
Full textAbstract:
This study developed an applied method based on the degradation to remove ethylene bisdithiocarbamate (EBDC) fungicides from wastewater and agricultural runoff by zinc oxide nanoparticles (ZnONPs). The synthesized ZnONPs were characterized using XRD for material crystallinity, scanning electron microscope (SEM) and particle size analysis (PSA) for surface structure, morphology and particle size (nm), respectively. The energy-dispersive X-ray spectroscopy (EDX) spectra confirmed the presence of zinc and showed that the synthesized zinc oxide nanoparticles were pure. Determination of the adsorption and photocatalytic degradation of Mancozeb (MCZ) fungicides based on ZnONPs was performed. Different amounts of ZnONPs were loaded into an MCZ fungicide solution in different concentrations. High-performance liquid chromatography (HPLC) and UV-Vis spectroscopy were used to determine the dithiocarbamate residue and the degradation efficiency of the synthesized particles. The particle size distribution of the synthesized ZnONPs was found to be in the range of 50-95 nm. At optimum conditions, with a ZnONPs dosage of 10 mg, (MCZ) fungicide concentration of 9.37 mg L-1, and a duration of 60 minutes, the degradation efficiency was surpassed at more than 95%. Additionally, the nanoparticles demonstrated excellent reusability and maintained efficient activity for up to three cycles.
35
Rahayu, Sri, Aghni Ulma Saudi, Riesma Tasomara, et al. "The Calcination Temperature Effect on Crystal Structure of LiNi1/3Mn1/3Co1/3O2 Cathode Material for Lithium-Ion Batteries." Journal of Batteries for Renewable Energy and Electric Vehicles 1, no. 02 (2023): 68–75. http://dx.doi.org/10.59046/jbrev.v1i02.22.
Full textAbstract:
The lithium-ion battery has gained popularity among other secondary batteries for portable electronic devices and electric vehicle applications, especially the LiNi1/3Co1/3Mn1/3O2 or NMC111, considering its well-balanced configuration resulting in stable and safe electrochemical performance. NMC111 has been successfully prepared using a coprecipitation process at calcination temperatures from 800 to 950°C. The physical characteristics were investigated using X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS), and Particle Size Analysis (PSA). The XRD patterns showed the rhombohedral single phase for all calcination temperatures. Meanwhile, higher calcination temperatures offer higher degree of crystallinity, lower intensity ratio and more undesirable cation mixing. The particles with a uniform rectangle or pyramid shape are observed at the calcination temperature range from 800 to 900°C. However, bigger submicron particles with a rectangle or pyramid shape are detected at a higher temperature (950°C). The SEM-EDS mapping shows the homogeneity composition for all variation calcination temperatures. PSA analysis showed that calcination temperature at 800 and 850°C gives the particle less than 400 nm suggesting a potential material for a cathode of lithium-ion batteries.
36
Sodik, J. J., D. I. Dinata, G. Jafar, et al. "INNOVATIVE CHARACTERIZATION OF CURCUMIN NANOPARTICLES AS ADVANCED PHYTOPHARMACEUTICALS." RASAYAN Journal of Chemistry 17, no. 04 (2024): 1860–63. http://dx.doi.org/10.31788/rjc.2024.1749019.
Full textAbstract:
Curcumin provides numerous advantages, including its antioxidant, antibacterial, anticancer, and anti-inflammatory properties. Despite these advantages, its ability to be absorbed by the body is limited. One effective method to improve curcumin's absorption is by developing curcumin nanoparticles. These nano-sized particles have several advantages over larger particles, notably a larger surface area that enhances absorption and improves penetration into cells. The nanoparticles produced will undergo analysis to determine their formulation characteristics by using particle size analysis (PSA) instruments to evaluate parameters such as particle dimensions, polydispersity index (PDI), and zeta potential. Morphology will also be examined using Fourier Transform Infrared Spectroscopy (FTIR) and Transmission Electron Microscopy (TEM). TEM results indicate that curcumin nanoparticles are smaller than 100 nm. FTIR analysis of nano-curcumin reveals the presence of functional groups typical of curcumin (C=O and O-H).
37
Kim, Tea Wan, Hyang Mi Lee, Yong Yee Kim, Kyu Hong Hwang, Hong Chae Park, and Seog Young Yoon. "Preparation and Characterization of Monodispersed and Nano-Sized Cu Powders." Materials Science Forum 534-536 (January 2007): 109–12. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.109.
Full textAbstract:
Monodispersed and nano-sized Cu powders were synthesized from copper sulfate pentahydrate (CuSO4ㆍ5H2O) inside a nonionic polymer matrix by using wet chemical reduction process. The sucrose was used as a nonionic polymer network source. The influences of a nonionic polymer matrix on the particle size of the prepared Cu powders were characterized by means of Xray diffraction (XRD), scanning electron microscopy (SEM), and particle size analysis (PSA). The smallen Cu powders with size of approximately 100㎚ was obtained with adding of 0.04M sucrose at reaction temperature of 60°C. The particle size of the Cu powders prepared by the reduction inside polymer network was strongly dependent of the sucrose content and reaction temperature.
38
Deepi, Alagu Segar, Srinivasan Dharani Priya, Clementz Edwardraj Freeda Christy, and Arputharaj Samson Nesaraj. "Facile Synthesis, Analysis of Physico-Chemical Properties and Tape Casting of Al2O3 Nanoparticles." Asian Journal of Chemistry 34, no. 10 (2022): 2651–56. http://dx.doi.org/10.14233/ajchem.2022.23882.
Full textAbstract:
Alumina (Al2O3) powder was synthesized by simple wet-chemical precipitation method. The phase study was done using XRD confirming the FCC phase. FTIR showed the presence of Al-O vibrations. Particle size analysis (PSA) confirmed the presence of particles in the range of 300 nm. The EDX confirmed the presence of Al and O elements in the samples only and no impurity elements. SEM exhibited the ultrafine nature of the particles. The tape casting of Al2O3 nanoparticles was carried out with suitable organic ingredients. Based on the trials, the best composition for alumina tape casting was optimized. The SEM of green alumina thin sheet resulted in good surface behaviour. Optimized composition may be used for fabricating thin Al2O3 based electrical components for application in electronics industry.
39
Shabri, Shabri, Dr Dadan Rohdiana, Hilman Maulana, et al. "Karakteristik nanopartikel ekstrak teh hijau dengan metode nano milling dan nano spray." Jurnal Sains Teh dan Kina 21, no. 2 (2019): 74–84. http://dx.doi.org/10.22302/pptk.jur.jptk.v21i2.146.
Full textAbstract:
Nanoparticles for raw materials of phytopharmaca is a technology used to be able to increase the effectiveness and efficiency of phytopharmaca in its absorption as a therapeutic agent. This study useds steamed green tea polyphenol extract as raw material with two nanoparticle methods, first nano milling by Planetary Ball Milling (PBM) and the second using encapsulation method with Nano Spray Dryer (NSD). The characteristics of nanoparticles were then analyzed using Particle Size Analyzer (PSA) and X-Ray Difraction (XRD) to determine the size, size distribution, and type of crystals formed by the two methods. The results of PBM had not been able to meet the criteria for nanoparticles because they had a particle size that is >1 µm, whereas the NSD method produced 554.7 nm nanoparticles with an intensity of 86.9%. And the results of the XRD analysis showed that the two methods of making nanoparticles resulted in amorphous particles >50%.
40
Chafidz, Achmad, Suharno Rusdi, Imam Nurrahman, et al. "Synthesis of silver (Ag) nano/micro-particles via green process using Andrographis paniculata leaf extract as a bio-reducing agent." Communications in Science and Technology 9, no. 1 (2024): 199–206. http://dx.doi.org/10.21924/cst.9.1.2024.1450.
Full textAbstract:
In this work silver nano/micro-particles have been synthesized using sambiloto (Andrographis paniculata) plant extract as a bio-reducing agent. The effects of different plant extract concentrations, AgNO3 precursor concentrations, and reaction time on the synthesized silver nano/micro-particles were investigated. The silver nano/micro-particles samples were then analyzed using UV-Vis spectrophotometer (UV-Vis), X-Ray Diffractometer (XRD), Field Emission Scanning Electron Microscopy (FESEM), Particle Size Analyzer (PSA), and Fourier Transform Infra-Red (FTIR) spectroscopy. The UV-Vis absorbance spectrum of the colloid silver nano/micro-particles exhibited that all samples had absorbance peaks at a wavelength around 450 nm, confirming the formation of silver nano/micro-particles. It was also found that the UV-Vis absorbance peak of the silver nano/micro-particles inversely increased with decreasing AgNO3 solution concentration. Whereas, the higher the sambiloto extract concentration the higher the UV-Vis absorbance peaks. The UV-Vis absorbance peak increased with increasing synthesis time, suggesting that silver nano/micro-particles became more prominent. The UV-Vis absorbance peaks of the silver nano/micro-particles were about 0.0462, 0.0637, 0.0729, and 0.0936 at reaction time of 5, 10, 20, and 40 min, respectively. The XRD analysis result confirmed that the synthesized silver nano/micro-particles were in the form of nanocrystals with a face-centered cubic centered without any impurities. Additionally, the FESEM images showed that the silver nano/micro-particles had the primary particle size of 150-300 nm. There was the formation of some secondary particles with the size of about 0.7-1.5?m due to the agglomeration of primary particles. The particle size distribution analysis further confirmed the presence of primary and secondary particles. Meanwhile, the FTIR analysis confirmed the presence of four main peaks, linked to functional groups in the sambiloto extract and involved in the creation of silver nano/micro-particles.
41
Esti Prihatini, Gilang Dwi Laksono, Dhiya Khairunissa, Istie Rahayu, and Rohmat Ismail. "Characteristics and Applications of Bionanosilica from Betung Bamboo Leaves." Journal of Engineering, Technology, and Applied Science (JETAS) 6, no. 3 (2024): 153–66. https://doi.org/10.36079/lamintang.jetas-0603.766.
Full textAbstract:
Nanoparticles are materials that are currently widely used in research due to their novelty and the growing number of suitable applications. Silica nanoparticles can be produced by synthesizing using several methods such as melting, coprecipitation, sol-gel, and ultrasonication. The aim of this study is to determine the most appropriate synthesis method for the production of SiO₂ nanoparticles to optimize the quality of physical properties of fast-growing wood. The synthesis of SiO2 nanoparticles used in this study utilized three different methods: acid isolation method (F1), sol-gel method (F2), and reflux method (F3). Characterization of SiO2-NPs was performed using particle size analyzer (PSA), X-ray diffraction analysis (XRD), and Fourier transform infrared spectroscopy (FTIR). The results of PSA analysis showed that the acid isolation method produced the smallest SiO2 particle size compared to the sol-gel and reflux methods. The zeta pontential value in each method shows that the particles produced are unstable because the potential zeta value produced is around -10 mV to -30 mV. The results of FTIR and XRD analysis show that the synthesized material is a SiO₂ compound with a cristobalite phase. Application of the material on jabon wood through impregnation showed an improvement in physical properties, including an increase in WPG, density, and BE, especially in the sol-gel method (F2).
42
Syahjoko Saputra, Iwan, Anjar Hermadi Saputro, Nur Adliani, Dwinna Rahmi, Sudirman Sudirman, and Yogi Nopiandi. "Eco-Friendly Synthesis of Gold Nanoparticles through Gracilaria sp Seaweed Extract for Foam Height Stability in Liquid Hand Soap Formulations." Journal of Pure and Applied Chemistry Research 10, no. 3 (2021): 193–202. http://dx.doi.org/10.21776/ub.jpacr.2021.010.03.599.
Full textAbstract:
Gold nanoparticles (G-NPs) were successfully synthesized using Gracilaria sp seaweed extract. Visually, color changes from purple-blue to ruby red and then finally to pink. UV-Vis spectrophotometer showed the optimum condition of G-NPs at 531 nm wavelength with an absorbance value of 1.1. The fourier transform infrared (FTIR) spectroscopy shows the absorption peak of functional groups at the Gracilaria sp seaweed extract like hydroxyl group (-OH), aromatic (C=C), alkane (C-H), and amine (C-N) at the wavenumbers of 3356, 1613, 1456, and 1182 cm-1, respectively. The X-ray diffraction (XRD) shows the crystallinity peaks of G-NPs at 2θ: 38.3o, 44.1o, 64.8o, and 77.8o with miller indices of (111), (200), (220), and (311). The Particle size analyzer (PSA) shows the distribution and particle size average of G-NPs was 11.8 nm. Analysis of particle zeta charge (PZC) confirms the total charge of inter-particles was -24.7 mV. The transmission electron microscopy (TEM) images shows the G-NPs was spherical shape with a particle size was 20 nm. The hand soap@G-NPs have a pH of 6.0 and foam height stability of 4.1 cm for 10 min.
43
Irwansyah, Ferli Septi, Alfi Ikhlasul Amal, Eko Prabowo Hadisantoso, et al. "Effect of Low Solid/Liquid Ratio on Hydrothermal Synthesis of Hydroxyapatite with Green Template from Banana Flower (Musa acuminata Cavendish)." al-Kimiya 10, no. 1 (2023): 57–63. http://dx.doi.org/10.15575/ak.v10i1.25262.
Full textAbstract:
Hydroxyapatite (HA) was successfully synthesized using the hydrothermal method. This study aimed to analyze the effect of a low solid/liquid ratio on the properties of HA crystals. HA synthesis was performed using chicken eggshells and the hydrothermal method at a temperature of 150°C. The solvent amount was kept constant, while the solid amount varied (half-reaction). The characteristics of HA were determined using XRD, FTIR, PSA, and SEM. The results showed that the purity and size of HA were influenced by a low solid/liquid ratio, while the crystallinity remained relatively unchanged, directly impacting the lattice parameter value. FTIR analysis revealed the absence of the O-H group in the sample with the low solid/liquid ratio. PSA results showed a smaller particle size of 0.995 µm for the sample with the low solid/liquid ratio. SEM results demonstrated a smaller particle size in the sample with a low solid/liquid ratio when observed at the same magnification
44
Anggaravidya, Mahendra, Sudirman Sudirman, Bambang Soegijono, Emil Budianto, and Martin Djamin. "The Carbon Black Sonofication Effects on Vulcanisate Properties of Natural Rubber." Advanced Materials Research 626 (December 2012): 114–20. http://dx.doi.org/10.4028/www.scientific.net/amr.626.114.
Full textAbstract:
The mechanical properties of natural rubber can be enhanced by the addition of carbon black. The mechanical properties change is highly affected by particle size and carbon black structure used. A modification of N660 carbon black was conducted in the research by sonoficating the carbon black for 3 and 5 hours (N600-M3; M5). The results of adding modified carbon black were characterised by Particle Size Analysis (PSA), Scanning Electron Microscopes - Energy Dispersive Spectrometry (SEM-EDS) and Thermogravimetric Analysis (TGA). The addition of modified carbon black shows bound rubber, thermal properties, and mechanical properties such as tensile strength, elongation at break and modulus 300% on the vulcanisate produced were increased from the vulcanisate that had been filled with N660 natural (N660-N). Keywords: natural rubber, carbon black, particle size, sonofication, characterisation
45
Sari, Rodiah Nurbaya, Hari Eko Irianto, and Diah Lestari Ayudiarti. "Using Oven Microwave for Synthesis ZnO Nps using Sargassum sp. and Padina sp. Extract." Jurnal Pengolahan Hasil Perikanan Indonesia 22, no. 2 (2019): 375–90. http://dx.doi.org/10.17844/jphpi.v22i2.27834.
Full textAbstract:
An oven microwave was established for synthesis of zinc oxide nanoparticles using Sargassum sp. and Padina sp. extract and 0.1 M ZnCl2 solution as a precursor. The ZnO nanoparticles had been characterized such as chemical structure by Fourier transform infrared (FTIR) spectroscopy, particle size distribution with Particle Size Analyzer (PSA), Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEMEDS) and crystalline properties with X-ray diffraction (XRD). The result showed that FTIR spectra revealed the involvement of hydroxyl groups and sulfate polysaccharide in the formation of ZnO NPs and protein was involved in stabilizing. PSA analysis showed that the size ranged of ZnO NPs extract Sargassum sp. synthesized 351,14 and 1.336.19 nm for extract Padina sp. The particle size distribution was homogeneous but their size hadn’t met the size of nanometers. The range of %mass elements Zn and O ZnO extract Sargassum sp. and Padina sp. synthesized didn’t approach standard ZnO. The crystallinity properties showed only ZnO extract of Padina sp. synthesized which had a peak with an angle value of 2θ was almost equal to standard ZnO and after confirmed to Match program! 3 crystal structure ZnO synthesized wasn’t imperfect hexagonal wurtzite. Ovens microwave could be used to synthesize ZnO from Padina sp. extract but it was still necessary to develop a method so that ZnO could be obtained with nanoparticle size and ideal hexagonal wurtzit structure.
46
Yuanita, Emmy, Ainni Rohmana, Maria Ulfa, et al. "Synthesis and characterization of ZnO nanoparticles using the duwet (Syzygium cumini) leaf extract as a bioreductor." Acta Chimica Asiana 8, no. 1 (2025): 541–47. https://doi.org/10.29303/aca.v8i1.175.
Full textAbstract:
Synthesis of ZnO nanoparticles was carried out using a green synthesis method that utilizes plants as bioreductors. Secondary metabolites contained in plants can act as bioreductors in the metal oxide reduction process and capping agents in the production of ZnO nanoparticles. In this study, the characterization of ZnO nanoparticles was carried out using duwet (Syzygium cumini) leaf extract. The Synthesis was carried out by varying the composition of zinc acetate dihydrate solution and duvet leaf extract in the 1:1, 1:2, 1:3, and 1:4 ratios, as well as pH 7, 8, 9, and 10. The resulting ZnO nanoparticles were then characterized using UV-Vis spectrophotometry to determine the optimal conditions, a Particle Size Analyzer (PSA) to determine the particle size and X-ray diffraction (XRD) to determine the purity of the resulting nanoparticles by looking at the 2θ peak formed. Optimal conditions for synthesizing ZnO nanoparticles were obtained with a maximum wavelength (λmax) of 369 nm at a ratio of 1:2 and pH 8. The particle size distribution analysis results from PSA showed an average size of 19.52 nm, with a Poly Dispersity Index (PDI) value of 0.2491. The results of the analysis using XRD showed that the synthesized nanoparticles showed typical peaks for ZnO with 2θ values of 31.7680º, 34.3699º, and 36.2281º, which indicated that the Synthesis of nanoparticles had successfully produced pure ZnO nanoparticles.
47
Penther, Daniela, Claudia Fleck, Alireza Ghasemi, Ralf Riedel, and Sepideh Kamrani. "Development and Characterization of Mg-SiC Nanocomposite Powders Synthesized by Mechanical Milling." Key Engineering Materials 742 (July 2017): 165–72. http://dx.doi.org/10.4028/www.scientific.net/kem.742.165.
Full textAbstract:
Magnesium powder in micron scale and various volume fractions of SiC particles with an average diameter of 50 nm were co-milled by a high energy planetary ball mill for up to 25 h to produce Mg-SiC nanocomposite powders. The milled Mg-SiC nanocomposite powders were characterized by scanning electron microscopy (SEM) and laser particle size analysis (PSA) to study morphological evolutions. Furthermore, XRD, TEM, EDAX and SEM analyses were performed to investigate the microstructure of the magnesium matrix and distribution of SiC-reinforcement. It was shown that with addition of and increase in SiC nanoparticle content, finer particles with narrower size distribution are obtained after mechanical milling. The morphology of these particles also became more equiaxed at shorter milling times. The microstructural observation revealed that the milling process ensured uniform distribution of SiC nanoparticles in the magnesium matrix even with a high volume fraction, up to 10 vol%.
48
Sari, Rodiah Nurbaya, Nanda Saridewi, and Shofwatunnisa Shofwatunnisa. "Biosynthesis and Characterization of ZnO Nanoparticles with Extract of Green Seaweed Caulerpa sp." Jurnal Perikanan Universitas Gadjah Mada 19, no. 1 (2017): 17. http://dx.doi.org/10.22146/jfs.24488.
Full textAbstract:
Biosynthesis and characterization of ZnO Nanoparticles by the reduction method have been performed. This study aims to determine the ability of Caulerpa sp. as a reducing agent and stabilizer. Extract Caulerpa sp. was reacted with Zn(CH3COO)2.2H2O solution in variation concentration of 0.05, 0.1, and 0.15 M and the pH of the solution was conditioned with NaOH 0.1 M added became 7, 8, 9. Characterization of ZnO nanoparticles was performed for functional group analysis (FTIR), surface morphology and particle distribution (SEM), knowing the phase type (XRD), and particle size and particle size (PSA). The result of phase analysis by XRD shows that the synthesis of ZnO nanoparticles using green seaweed extract Caulerpa sp. has been successfully performed with the formation of the optimum ZnO nanoparticles 0.15 M at pH 8. The ZnO nanoparticles had a relatively similar particle size distribution with an average particle size of 370.72 nm. Based on FTIR results it was known that the compound suspected to act as a bioreductor and stabilizer agent in the synthesis of ZnO nanoparticles was a protein
49
Hakim, Muhammad Lukman Nur, Yanwar Faza, Zulia Hasratiningsih, Nina Djustiana, and Bambang Sunendar. "Hardness evaluation of dental composites fabricated from the uniform size and well-distributed zirconia-alumina-silica fillers with sol-gel technique." Padjadjaran Journal of Dentistry 30, no. 2 (2018): 78. http://dx.doi.org/10.24198/pjd.vol30no2.18319.
Full textAbstract:
Introduction: Several factor limits of services of dental composite have triggered further improvement. ZrO2-Al2O3-SiO2 system as filler of dental composite had been developed with sol-gel technique. Ultrasonic homogeniser were reported to change the particle size ditribution or shape. Unifom size and distribution of particle is believed to help define the behavior of hardness properties. Methods: The study was an laboratory experimental design. Filler ZrO2-Al2O3-SiO2 system were developed via sol-gel methods. Post calcination process, filler were immerse in ethanol and applied with ultrasonic homogeniser, with various amplitude i.e 50 rpm, 60 rpm and 80 rpm then named sample A, B, and C. XRD, SEM anda PSA were used to characterize of filler system. Subsequent filler were used to fabricate dental composite then evaluate the hardness value using micro-hardness tester. One–way ANOVA was used to analysis the statistical result of hardness value. Results: XRD pattern of three sample were similar in which tetragonal zirconia was prominent (57-61 %) followed by monoclinic zirconia (24-25%) and amorphous (15-17 %). While, SEM and PSA characterization showed amplitude 50 rpm (sample A) produce more uniform size and well-distributed particle filler than the others. In contrary, sample B and C showed higher peak in PSA results. It means there was dominating of filler with particular size. However, the hardness value did not show significant differences between those filler (p>0,05). Conclusion: Dental composite that contain of different uniformity and distribution of filler ZrO2-Al2O3-SiO2 system has no significantly differences of hardness value.
50
Prihapsara, F., A. N. Artanti, and L. F. U. Ni’mah. "Characterization and antimicrobial activity of gold nanoparticles fruit infusion of Medinilla speciosa." Journal of Physics: Conference Series 2190, no. 1 (2022): 012030. http://dx.doi.org/10.1088/1742-6596/2190/1/012030.
Full textAbstract:
Abstract Parijoto (Medinilla speciosa) is one of plants known to have antibacterial activity that can be used as bioreductor. The purpose of this study was to determine the antibacterial activity of gold nanoparticles using Parijoto as bioreductor (AuNPsP) and to determine the concentration that had the highest antibacterial activity against Pseudomonas aeruginosa and Staphylococcus aureus. This research was conducted to prepare gold nanoparticles using reductant infusion of parijoto fruits, with a ratio of reducing agent and gold solution 1:4, 1:6, and 1:8 respectively. Characterization of gold nanoparticles was carried out using UV Vis Spectrophotometer, Particle Size Analyzer (PSA), Fourier Transformed Infrared (FTIR) Spectrophotometer, Transmission Electron Microscope (TEM) then tested for antibacterial investigation against Pseudomonas aeruginosa and Staphylococcus aureus. The morphology, size, and structural properties of synthesized gold nanoparticles were determined with TEM and PSA analysis which showed spherical mono-dispersed structure with an average particle size of 200-450 nm. FTIR analysis reveal that are responsible for the capping and stabilization of synthesized gold nanoparticles. The effectiveness of AuNPsP against Pseudomonas aeruginosa and Staphylococcus aureus increases as the concentration of gold nanoparticle increases. Therefore, the antibacterial investigation revealed that the AuNPsP exhibited good antimicrobial activity.