To see the other types of publications on this topic, follow the link: Trinocular Microscope and ANSYS.
Journal articles on the topic 'Trinocular Microscope and ANSYS'
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 'Trinocular Microscope and ANSYS.'
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
BULLIBABU, KANCHARLA. "Production and characterization of Fired Clay Bricks with Admixture of Palmyra Fruit Fiber and Evaluated by Ansys." Production and characterization of Fired Clay Bricks with Admixture of Palmyra Fruit Fiber and Evaluated by Ansys 04, no. 10 (2017): 26–31. https://doi.org/10.5281/zenodo.14228778.
Full textAbstract:
The effect of compositions ofPalmyra fruit fiber admixture on thermalstresses and other mechanical properties of Claywere investigated. The raw clay gotten fromSuryapet in Telangana state. First processed tovery fine particles of clay were also dried atatmosphere temperature to remove moisturepresent. A composite mixture of this driedPalmyra fruit fiber with the processed clay wasmade at various proportions of the Palmyra fruitfiber, with a little addition of water forplasticity. Samples of rectangular dimensionswere then produced from the mounting press bythe process of compaction with a very highpressure. The samples were dried and thenfinally fired in the furnace at 1000°C for a finalcuring. Properties which include thermal shockresistance, bulk density, cold crushing strengthand porosity were obtained by the appropriatestandard test methods. The microstructures ofthe fired samples were characterized withTrinocular Microscope.The results show that the amount of Palmyrafruit fiber admixture affects the propertiesvariously; porosity and thermal resistanceincreases with percentage increase in Palmyrafruit fiber, thermal and mecha
2
Khalifah, Tur Ridha Noer, Hasnah Natsir, Siti Fauziah, and Indah Raya. "Synthesis and Characterization of Hydrogels Derived from Cellulose of Water Hyacinth (<i>Eichornia crassipes</i>) and Chitosan Using the Freeze-Thaw Method." Materials Science Forum 1061 (May 26, 2022): 91–96. http://dx.doi.org/10.4028/p-w4p187.
Full textAbstract:
This study aims to determine the absorption and ability of hydrogels to hold water. The hydrogel was synthesized using the freeze-thaw method, then the absorption ability and water retention time in the hydrogel were tested and characterized by FTIR and trinocular stereo microscope. The FTIR results showed that the resulting hydrogel had N–H, O–H, aliphatic C–H, bend N–H, C–O, and C–N functional groups. The highest absorption of the hydrogel with a ratio of cellulose:chitosan:EDTA variations of 2:2.25:0.25 (g) respectively, which was 287.46% and the appearance of the hydrogel under a microscope showed that the structure of the hydrogel was rather hollow, so that it affected its absorption.
3
Vurchio, Federica, Pietro Ursi, Francesco Orsini, et al. "Toward Operations in a Surgical Scenario: Characterization of a Microgripper via Light Microscopy Approach." Applied Sciences 9, no. 9 (2019): 1901. http://dx.doi.org/10.3390/app9091901.
Full textAbstract:
Micro Electro Mechanical Systems (MEMS)-Technology based micro mechanisms usually operate within a protected or encapsulated space and, before that, they are fabricated and analyzed within one Scanning Electron Microscope (SEM) vacuum specimen chamber. However, a surgical scenario is much more aggressive and requires several higher abilities in the microsystem, such as the capability of operating within a liquid or wet environment, accuracy, reliability and sophisticated packaging. Unfortunately, testing and characterizing MEMS experimentally without fundamental support of a SEM is rather challenging. This paper shows that in spite of large difficulties due to well-known physical limits, the optical microscope is still able to play an important role in MEMS characterization at room conditions. This outcome is supported by the statistical analysis of two series of measurements, obtained by a light trinocular microscope and a profilometer, respectively.
4
TYAGI, KAOMUD, DEVKANT SINGHA, RAJASREE CHAKRABORTY, AVAS PAKRASHI, and VIKAS KUMAR. "A new species of Apelaunothrips (Thysanoptera: Phlaeothripidae) from India with new synonym of Podothrips sasacola Kurosawa." Zootaxa 4751, no. 1 (2020): 196–200. http://dx.doi.org/10.11646/zootaxa.4751.1.14.
Full textAbstract:
The first objective of this paper is to describe a new fungus-feeding species in the Phlaeothripinae genus Apelaunothrips, and to provide a key to the six species of this genus recorded from India. The second objective is to establish a new synonym in the Poaceae-associated genus, Podothrips, based on structural variation observed among recently collected samples from bamboo. The slide-mounted specimens were studied with a Leica Trinocular Microscope (Leica DM-1000) and a Leica software application suite (LAS EZ 2.1.0) was used to make line drawing and photographs.
5
Li, Xiyao, Jingwen Chen, Yong He, et al. "High-through counting of Chinese cabbage trichomes based on deep learning and trinocular stereo microscope." Computers and Electronics in Agriculture 212 (September 2023): 108134. http://dx.doi.org/10.1016/j.compag.2023.108134.
Full text
6
McCuskey, R. S. "High-resolution light microscopy of living organs in situ." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 790–91. http://dx.doi.org/10.1017/s0424820100140324.
Full textAbstract:
Most organs in anesthetized small laboratory animals can be studied in vivo by light microscopy of relatively thin (3-5mm), transilluminated areas of the organ. Thicker areas of the organs in these species, as well as thicker organs of larger animals can be examined only by epi-ilumination. However, the resolution obtainable with epi-ilumination usually is inferior to that realized with transillumination. This paper reviews these methods using the liver as an example of the organ of study. A standard compound trinocular microscope is used which is modified for in vivo microscopy and is equipped for both transillumination and epi-illumination. After the animal is anesthetized, the liver is gently exteriorized through a subcostal, abdominal incision and positioned over a window of optical grade mica or glass on a specially designed, heated microscope stage having provisions for draining irrigation fluids. The window overlies a long working distance condenser. The liver is covered by a piece of Saran or Mylar film which holds it in position and limits movements induced by respiration, the heart and the intestines.
7
Alfianny, Rika, Ardhiani Kurnia Hidayanti, and Tati Suryati Syamsudin. "Preservation technique to identify Bactrocera dorsalis complex (Diptera: Tephritidae) based on image analysis." Jurnal Entomologi Indonesia 19, no. 2 (2022): 174–79. http://dx.doi.org/10.5994/jei.19.2.174.
Full textAbstract:
Fruit flies (Bactrocera dorsalis (Hendel)) are insect pests of many fruits and vegetables. Yield losses due to this pest can reach 100%, and many may be unaware that fruit flies are the trigger for several disease attacks on crops such as fungi and bacteria. This study aimed to identify the most appropriate preservation technique for morphological identification of B. dorsalis by image analysis. Images were taken with the Nikon DSF12 Trinocular Microscope. The methods used varied by trapping period (short-term and long-term) and types of preservatives (ethanol and propylene glycol). Specimens were obtained from Bandung and Sumedang Regency. Results demonstrated that ethanol-based preservation was the most appropriate to acquire the abdominal image of B. dorsalis obtained via short-term trapping, meanwhile a propylene glycol-based preservation was suggested for specimens trapped using longer-term methods.
8
Elsy, Bijo, and Aijaz Ahmed Khan. "Histopathological Study of Experimentally Crushed Skeletal Muscle’s Regeneration in Adult Albino Rats." Asian Pacific Journal of Health Sciences 9, no. 1 (2022): 185–89. http://dx.doi.org/10.21276/apjhs.2022.9.1.44.
Full textAbstract:
Aim: This study aims to explain all the events of skeletal muscle repair and regeneration with the help of suitable histophathlogical photomicrographs taken from crush-injured adult albino rat’s gluteus maximus muscle. Materials and Methods: The present study is part of our previous research study related to skeletal muscle repair and regeneration in crush injured gluteus maximus muscle of adult albino rats. The samples were processed for histopathological examination using routine and special histological staining procedures. The tissue samples were examined under trinocular microscope, and the fields showing interesting findings were recorded under different magnification. Results: In this study we observed all regenerative changes in myofibers and related structures after crushed injury. Conclusion: Histopathological studies with good stainings are helpful for the easy identification of minute changes that occurs in each stages of skeletal muscle regeneration.
9
TYAGI, KAOMUD, RAJASREE CHAKRABORTY, DEVKANT SINGHA, and VIKAS KUMAR. "A new species of Trichromothrips (Thysanoptera) from India with four new records." Zootaxa 4363, no. 1 (2017): 145. http://dx.doi.org/10.11646/zootaxa.4363.1.8.
Full textAbstract:
Globally 6100 species of the Order Thysanoptera are reported, of which 739 are known from India (Tyagi & Kumar 2016). The purpose here is to describe from India one new species and record for the first time from this country four other species, representing three different families, and full nomenclatural details are available at ThripsWiki (2017). From three of the species, including the holotype of the new species, DNA was isolated and amplification of partial fragment of mtCOI gene was performed (Tyagi et al. 2017) with the sequences submitted to the Barcode of Life Database. Photographs and illustrations were taken through a Leica Trinocular Microscope (Leica DM-1000) using Leica software application suite (LAS EZ 2.1.0). Voucher specimens, also the new holotype, are deposited in the National Zoological Collections (NZC), Zoological Survey of India, Kolkata, India.
10
Murali, Manohar Yadav*1 Ankit Srivastava2 Kriti Nigam2 &. Vijay K. Yadav2. "COMPARATIVE ANALYSIS OF WILD ANIMAL HAIRS." GLOBAL JOURNAL OF ENGINEERING SCIENCE AND RESEARCHES 5, no. 11 (2018): 239–45. https://doi.org/10.5281/zenodo.1544939.
Full textAbstract:
The present study was conducted to find out the macroscopic and microscopic characteristics of hair of nine endangered wild animals with the objective of species identification. Hairs remain unchanged chemically and histologically till several years. In present study the shredded hair sample of Bear (<em>Melursus ursinus</em>), Hyena (<em>Crocuta crocuta</em>), Lioness (<em>Panthera leo</em>), Lion (<em>Panthera leo</em>), Zebra (<em>Equus quagga</em>), Panther (<em>Panthera pardus</em>), Blackbuck (<em>Antilope cervicapra</em>), Sambar deer (<em>Rusa unicolor</em>) and Fishing cat (<em>Prionailurus viverrinus</em>) were collected from Lucknow zoological garden. Physical and cuticular characters were observed by trinocular compound microscope under 40x – 100x magnification. The specific variations were observed in this study among hair color, texture, scale margin, scale distance, and scale pattern. The combination of these parameters plays an important role in species identification.
11
Rieuwpassa, Frets J., Aprelia M. Tomasoa, Jaka F. P. Palawe, Fredrik Rieuwpassa, Revolson Alexius Mege, and Walter Balansa. "A New and Practical Method for Measuring Sponge Spicules." Jurnal Ilmiah PLATAX 11, no. 2 (2023): 322–32. http://dx.doi.org/10.35800/jip.v11i2.47882.
Full textAbstract:
Binocular light microscopy (BLM) is an excellent match for a scanning electron microscope (SEM) and a trinocular light microscope equipped with a micrometer (TLM). The practicality, user-friendliness, and short-time analysis of BLM make this method a good choice for spicule analysis. However, its effectiveness and accuracy are yet to be confirmed. This study aimed to validate the effectiveness of BLM by comparing its usefulness to both TLM and the gold standard methods. BLM was first subjected to measuring megascleres and microscleres of 2 sponges. Then, by using the If function built-in Excell and t-test in SPSS 16.0, the compatibility of BLM was evaluated against SEM by measuring the length of spicules from 4 Sangihe sponges and their counterpart species from different locations. Furthermore, the t-test analysis was used to validate the compatibility and effectiveness of our method to the TLM by measuring the spicules of four sponges. Both the F-function and the t-test analysis proved BLM was compatible with SEM with both measurements showing a perfect match for megascleres typed spicules of 4 compared sponges. This new technique also showed a perfect match with SEM (p = 0.367, t-test) and with TLM (p = 0.963, t-test). Keywords: Spicules, sponges, SEM, Wallacea, biomaterial, sponge taxonomy
12
Saragih, R., M. Simanjorang, I. Angrelina, et al. "Exploration, identification, and in vitro antagonism test of Trichoderma spp. against Ganoderma spp. at PT Bumitama Gunajaya Agro palm oil plantation, Central Kalimantan." IOP Conference Series: Earth and Environmental Science 976, no. 1 (2022): 012043. http://dx.doi.org/10.1088/1755-1315/976/1/012043.
Full textAbstract:
Abstract Trichoderma spp. is one of the biocontrol agents that have important benefits for agriculture in Indonesia. Exploration is carried out at PT Bumitama Gunajaya Agro Oil Palm Plantations in high yield blocks. This study aims to identify and determine the isolates of Trichoderma spp. and to find out its in vitro antagonism against Ganoderma spp. Morphological identification of Trichoderma spp. carried out using a trinocular microscope. There were six isolates analyzed based on internal transcribed spacer sequences (ITS) in ribosomal DNA region using PCR technique with ITS 1 and ITS 4. The results of this research showed that Trichoderma spp. original from PT BGA Central Kalimantan has diverse characteristics. Sequencing analysis showed that six isolates were in one group with Trichoderma asperellum isolates T5 (Acc. No. MH809176), IIPR-80 (Acc. No. MK841018) and TV5 (Acc. No. MH393299). Based on the antagonism test, it was found that six isolates were able to inhibit the growth of Ganoderma spp. with an average percentage value is ≥50%.
13
Zahrah, Natasya Adiba, Muhamad Justitia Ramadhan, Sinta Kharomah, et al. "Wing Damage and Size Reduction in Drosophila melanogaster Caused by Bisphenol A." BIO Web of Conferences 183 (2025): 01007. https://doi.org/10.1051/bioconf/202518301007.
Full textAbstract:
Bisphenol A (BPA) often contaminates human food, although it is indicated to have negative impacts on health. This study aims to investigate the effect of BPA exposure on the wing morphology of Drosophila melanogaster. The flies were exposed to BPA at concentrations of 0.25 mg/mL and 0.5 mg/mL for one generation, with four replicates each treatment. For wing damage measurements, 160 flies were randomly selected and observed from each strain and each treatment, while the wing length parameter involved 10 male flies in each group. An Olympus SZ61 series stereo trinocular microscope was used to observe the wings, while an Olympus EP50 camera was used to document the wings. As a result, wing damage was observed in each strain exposed to BPA, both at 0.25 and 0.5 mg/mL levels. For wing length, both right and left wings, this parameter was only affected by the type of strain. These findings contribute to a better understanding of the potential health impacts of BPA.
14
Banavar, Spoorthi Ravi, Prashanthi Chippagiri, Rohit Pandurangappa, Saileela Annavajjula, and Premalatha Bidadi Rajashekaraiah. "Image Montaging for Creating a Virtual Pathology Slide: An Innovative and Economical Tool to Obtain a Whole Slide Image." Analytical Cellular Pathology 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/9084909.
Full textAbstract:
Background. Microscopes are omnipresent throughout the field of biological research. With microscopes one can see in detail what is going on at the cellular level in tissues. Though it is a ubiquitous tool, the limitation is that with high magnification there is a small field of view. It is often advantageous to see an entire sample at high magnification. Over the years technological advancements in optics have helped to provide solutions to this limitation of microscopes by creating the so-called dedicated “slide scanners” which can provide a “whole slide digital image.” These scanners can provide seamless, large-field-of-view, high resolution image of entire tissue section. The only disadvantage of such complete slide imaging system is its outrageous cost, thereby hindering their practical use by most laboratories, especially in developing and low resource countries.Methods. In a quest for their substitute, we tried commonly used image editing software Adobe Photoshop along with a basic image capturing device attached to a trinocular microscope to create a digital pathology slide.Results. The seamless image created using Adobe Photoshop maintained its diagnostic quality.Conclusion. With time and effort photomicrographs obtained from a basic camera-microscope set up can be combined and merged in Adobe Photoshop to create a whole slide digital image of practically usable quality at a negligible cost.
15
Awaludin, Iwan, Trisna Gelar, Muhammad Rizqi Sholahuddin, Gina Melinia, Irvan Kadhafi, and Rezky Wahyuda Sitepu. "Dataset Citra Papan Sirkuit Tercetak dengan Komponen yang Terbakar." Building of Informatics, Technology and Science (BITS) 3, no. 3 (2021): 179–85. http://dx.doi.org/10.47065/bits.v3i3.1025.
Full textAbstract:
The application of artificial intelligence, especially in the automatic optical inspection of printed circuit boards or PCBs, is increasingly being carried out by researchers. Unfortunately, the data used to train and test artificial intelligence models is synthetic data. Printed circuit boards in good condition are imaged and then changed by software to give the impression of defects. In addition, the type of damage is limited to pre-operation, namely when the PCB is not yet operational. After the PCB is operational, damage can occur, for example, burned components. Until now, there is no data set of PCB images with burned components. This study, therefore, explores data retrieval techniques that can produce the required data set. This data collection technique includes hardware setup and PCB data sources. Based on the exploration results, it is concluded that a trinocular digital microscope with high resolution can produce sharp PCB images. The obstacle that arises is the difficulty of getting PCBs with burned components. The solution was obtained by referring to the PCB repair video from the Youtube channel. Several data were collected and tested with EfficientDet with 90% mAP.
16
Bocchetta, Gabriele, Giorgia Fiori, Federico Filippi, et al. "Experimental and Finite Element Model-based framework for grasping force analysis with electrostatic microgrippers: a case study using a human hair." Acta IMEKO 13, no. 4 (2024): 1–10. https://doi.org/10.21014/actaimeko.v13i4.1783.
Full textAbstract:
Microgrippers (MGs) are MEMS devices designed specifically for microscopic-scale object manipulation, which makes them ideally suited for implementation in biomedical tissue manipulation applications. This work presents a novel method for estimating the grasping force of a MG prototype equipped with electrostatic rotary comb-drives and Conjugate Surface Flexure Hinges using a cross-approach based on both experimental and a finite element analysis. Firstly, the torque exerted by the microactuators, necessary to deform the MG has been evaluated. The rotation of the microactuators is measured in the experimental analysis through an image analysis approach developed by the Authors from videos acquired by a camera mounted on a trinocular optical microscope, while the hinge stiffness has been determined using numerical simulations. This torque provided an initial estimate of the grasping force potential. Subsequently, in order to evaluate the force that the jaws of the MG are capable of applying in grasping operations, experimental tests have been carried out on a human hair with a diameter of (86 ± 3) µm. The results obtained show that the jaws of the device apply a maximum force of (1.42 ± 0.18) µN while grasping the hair.
17
Gache, Ciara Catherine, Sherwin Mesa, Thea Clarice Prado, et al. "Fabrication and Testing of a Vapor Polishing Device for ABS 3D-Printed Parts." SciEnggJ 16, no. 1 (2023): 1–7. http://dx.doi.org/10.54645/2023161zyp-27.
Full textAbstract:
Post-processing plays a significant role in improving the surface and mechanical properties of 3D-printed parts. One of these post-processing methods is vapor polishing which utilizes acetone to polish 3D-printed Acrylonitrile Butadiene Styrene (ABS) specimen. This process is usually done using an improvised vapor polishing setup to achieve the desired surface finish of parts. Hence, in order to accomplish a uniform and standard polishing procedure for laboratory use, a vapor polishing device has been developed in this study. To assess the efficiency of the said device, the resulting surface roughness, dimensional accuracy, and tensile strength of ABS 3D-printed polished specimens have been evaluated and compared to unpolished specimen. The surface roughness of the cube specimen was captured using a Trinocular Microscope and was uploaded to the Mountains9 Topography software. Further, the dimensional accuracy of both polished and unpolished specimen has been measured using a digital Vernier Caliper. The data demonstrated that the polished specimen’s surface was enhanced while its shape, geometry, and dimension were preserved. Tensile tests on two (2) sample sets of polished and unpolished specimens revealed that polishing with acetone vapor using this developed device could improve the specimen’s tensile strength.
18
Nascimento, Mara Regina Bueno de Mattos, Enéias Aurélio Dias, Thaisa Reis dos Santos, Gustavo Ferreira Ayres, Carolina Cardoso Nagib Nascimento, and Marcelo Emílio Beletti. "Effects of age on histological parameters of the sweat glands of Nellore cattle." Revista Ceres 62, no. 2 (2015): 129–32. http://dx.doi.org/10.1590/0034-737x201562020001.
Full textAbstract:
The sweat glands are important in thermoregulation of cattle in a warm environment as they help dissipate heat through evaporation. Studies on gland histology are important to define its secretion potential and the capacity of perspiration and heat removal. The objective of this study was to determine, by histomorphometry, glandular epithelium height, the depth of the gland, length of the glandular portion and number of glands per cm2 of the sweat glands of the three age groups of Nellore cattle. Thirty females were used in this study. They were equally divided into calves, heifers and cows. Histological sections were obtained and analyzed by digital images in Trinocular BX40 Olympus microscope coupled to an Oly - 200 camera, connected to a computer. The images were obtained with microscope with 2x, 4x, 10x and 40x magnification objectives. The measurements were performed using HL Image 97 program. The height of glandular epithelium, depth of the glands, length and density of the glandular portion per cm2 , were all analyzed. The calves showed greater height of the glandular epithelium than heifers (P = 0.0024), and cows (P = 0.0191). The depth of the gland was not influenced by age. Cows had higher length of secretory portion than heifers (P = 0.0379) and calves (P = 0.0077). Heifers had a greater number of sweat glands per cm2 of skin than cows (P = 0.023). In cattle, the height of glandular epithelium and the density decreases as animals get older. On the other hand, the length of the secretor portion increases but with no changes in the depth of the sweat glands
19
Lenchenko, E. M., V. V. Ponomarev, and N. P. Sachivkina. "Identification of Escherichia coli, Escherichia albertii, Proteus vulgaris biofilms detected in poultry with respiratory and gastrointestinal diseases." Veterinary Science Today 14, no. 2 (2025): 186–93. https://doi.org/10.29326/2304-196x-2025-14-2-186-193.
Full textAbstract:
Introduction. When the body resistance-associated compensatory mechanisms are impaired or evolutionarily developed microbiocenoses are changed the quorum sensing signaling molecules facilitates excessive growth of pathogenic microorganisms. Antibacterial potential of inhibitors of intercellular communication molecule synthesis is achieved through reducing the microorganism adhesion and, consequently, in vivo and in vitro contamination.Objective. Study of the dynamics of morphometric and densitometric parameters of biofilms formed by Escherichia coli, Escherichia albertii, Proteus vulgaris isolates identified in poultry with respiratory and gastrointestinal diseases.Materials and methods. Dynamics of the biofilms formed by reference strains and isolates recovered from pathological samples from ROSS-308 chickens at the age of 40–42 weeks (n = 20) were studied. The sample optical densities were determined using Immunochem-2100 photometric analyzer (HTI, USA), wavelength 580 nm (OD580). Morphometric parameters were recorded at ≥ 90.0% reliable frequency in the field of view of Н604 Trinocular Unico optical microscope (United Products & Instruments Inc., USA) and Hitachi TM3030 Plus scanning electron microscope (Hitachi, Japan).Results. Escherichia coli, Escherichia albertii, and Proteus vulgaris were isolated from pathological samples from the poultry with catarrhal hemorrhagic aerosacculitis, hemorrhagic enteritis, fibrinous polyserositis and splenomegaly signs and then identified. Direct correlations (r = 0.91) between morphometric and densitometric parameters depending on the cultivation time were established. Cells with defective cell walls, spheroplasts, needle-like and giant structures as well as revertant cells dominated during heterogeneous population dispersion.Conclusion. General patterns of the heterogeneous microorganism population development are mediated by adhesion, synthesis of exocellular molecules, intensive cell proliferation and differentiation depending on the cell cycle stage.
20
Miranda, Viviane Bernardes dos Santos, Tatiane Mantovano, Yemna Gomes da Silva, Fábio Amodêo Lansac-Tôha, and Rosana Mazzoni. "Occurrence of Arcellidae (Amorphea, Arcellinida) in a coastal stream in the State of Rio de Janeiro." Acta Scientiarum. Biological Sciences 42 (August 24, 2020): e52710. http://dx.doi.org/10.4025/actascibiolsci.v42i1.52710.
Full textAbstract:
The aim of this study was to elaborate a taxonomic survey on the testate amoebae of the Family Arcellidae in coastal streams in the State of Rio de Janeiro. Six samplings were conducted in Ubatiba coastal stream (Maricá, RJ). In total, 130 liters water were filtered through a conical net of 60-μm mesh and preserved in 4% formalin. Organisms were identified with the aid of an inverted trinocular microscope. The morphological characteristics (lobose testate amoebae with shell composed of granular chitinoid elements) of each species were recorded. The species were described and illustrated. For the verification of new taxa records of Arcellidae in Rio de Janeiro and their distribution in Brazil, a search based on index articles by Scopus, Web of Science and Google Scholar using the keywords "tecamebas", "testate amoebae", "Arcella", "Arcellidae", "Brazil" and "Rio de Janeiro", was performed. Eight Arcellidae species were recorded. Some ecological and taxonomic information was provided. Due to the small amount of information on testate amoebae, this study is important because it reduces the knowledge gap regarding this community in the State of Rio de Janeiro. Furthermore, we suggest new studies on species identification to be conducted to expand regional knowledge about these organisms.
21
Garba, Yusuf. "Sporozoite infection and Entomological Inoculation Rate as a Measure of Endemic Malaria Transmission." European Journal of Biology and Medical Science Research 12, no. 2 (2024): 52–59. http://dx.doi.org/10.37745/ejbmsr.2013/vol12n25259.
Full textAbstract:
The study was conducted in Kontagora town of Niger State, North Central Nigeria. Sporozoite Infection Rate (SR) and Entomological Inoculation Rate (EIR) was assessed in spatial order. Indoor resting mosquitoes were collected using Pyrethrum Spray Catch (PSC). Morphological identification was carried out using a trinocular dissecting microscope with the aid of standard Taxonomic keys. Mosquito Salivary glands were carefully dissected for determination of Sporozoite Infection Rate. The proportion of individual mosquitoes infected with Plasmodium sporozoites were noted as the sporozoite rate (SR) in percentage. Entomological inoculation rate (EIR) was calculated as a product of Sporozoite Rate (SR) and Human Biting Rate (HBR) and expressed as infective bite per person (ib/p. Annual Sporozoite Infection Rate of 63.8 % was recorded. No significant variation was reported (p>0.05) in Sporozoite Infection Rate between sampling locations. Annual Entomological Inoculation Rate (EIR) for Kontagora was calculated to be 1.84 infective bite per person (ib/p). A significant difference (P<0.05) was however observed in EIR of Anopheline mosquitoes between sampling locations. The results established high Sporozoite Infection and Entomological Inoculation Rate which are key indices that sustains malaria transmission in Kontagora. Anopheline mosquitoes were reported to be infective throughout the study area. Vector control intervention based on local entomological data is strongly recommended.
22
Maciel, Cláudia Maria Reis Raposo, Eduardo Arruda Teixeira Lanna, Alaor Maciel Junior, Juarez Lopes Donzele, Clóvis Andrade Neves, and Eliane Menin. "Morphological and behavioral development of the piracanjuba larvae." Revista Brasileira de Zootecnia 39, no. 5 (2010): 961–70. http://dx.doi.org/10.1590/s1516-35982010000500004.
Full textAbstract:
The objective of this work was to study the morphologic development and the swimming and feeding behaviors of piracanjuba larvae, Brycon orbignyanus Valenciennes (1849) (Characiformes, Characidae, Bryconinae), during the period from zero to 172 hours after hatching (standard length = 3.62 - 11.94 mm). The morphological analyses were accomplished by using a trinocular stereo microscope, while the behavioral analyses were performed through periodic observations. In 28 hours after hatching, the larvae (standard length = 6.25 ± 0.13 mm) showed the following structural and behavioral characteristics that made them become active predators able to overcome a larval critical phase, the beginning of exogenous feeding: presence of pigmented eyes, terminal and wide mouth, developed oral dentition, developing digestive tube, yolk sac reduction, fins and swim bladder formation, horizontal swimming, cannibalism, and predation. Intense cannibalism among larvae was verified from 26 to 72 hours. At the end of the metamorphosis - 172 hours after hatching - the larvae measuring 11.94 + 0.80 mm in standard length presented a flexed notochord, caudal fin bifurcation, dorsal and anal fin formation, synchronized movements, and formation of shoals, characteristics that together allow enhanced perception and locomotio in exploration of the environment, determining the best moment for transfering to the fishponds. New studies can contribute to commercial fish farming by improving feeding management, performance, survival, and productivity of this species.
23
Garba, Yusuf. "Influence of Plasmodium Parasite Infection on Adult body size and Vectorial Fitness of Anopheline Vector Mosquitoes." European Journal of Biology and Medical Science Research 11, no. 3 (2023): 1–8. http://dx.doi.org/10.37745/ejbmsr.2013/vol11n318.
Full textAbstract:
The Study was designed to investigate the effect of Plasmodium parasite infection on Vectorial fitness of Anopheline mosquitoes. Adult mosquitoes were collected indoor using Pyrethrum Spray Catch (PSC). Morphological identification was carried out using a trinocular dissecting microscope with the aid of standard taxonomic keys. Dissection of the salivary gland was done to establish sporozoite infection. Wings were measured with an ocular micrometer from the apical notch to the axillary margin, excluding the wing fringe and used as proxy for body size. Data generated were analyzed using the SSPS software version 20.3 and excel package and processed using ANOVA, and Duncan multiple range test was used to compare their means. Findings revealed that Anopheline mosquitoes in Kontagora have a relatively similar body size as suggested by their wing length. Mean wing length (MWL) of Plasmodium infected and uninfected Anopheline mosquitoes do not varied significantly (P>0.05) across all the five sampling locations. The vectorial fitness of both Plasmodium infected and uninfected Anopheline mosquitoes were not significantly different (P>0.05) among the sampling locations. In this study, body size and vectorial fitness do not appeared to be predetermined factors for the infectivity of Anopheline mosquitoes as the proportion of Anopheline mosquitoes infected with sporozoites is independent of body size.
24
De Paiva, Luigi Pereira, Vinicius Braga Cavalcanti, Aldeney Andrade Soares Filho, Winston Kleine Ramalho Viana, Marcos Luiz da Silva Apoliano, and Rossi Lelis Muniz Souza. "WATER QUALITY AND PHYTO-ZOOPLANKTONIC BIOINDICTORS IN THE COCÓ RIVER ESTUARY, FORTALEZA/CE." Revista Contemporânea 3, no. 11 (2023): 20833–48. http://dx.doi.org/10.56083/rcv3n11-051.
Full textAbstract:
With the aim of analyzing water quality and verify the presence of phyto-zooplanktonic bioindicators in the Cocó River estuary, monthly plankton collections were carried out between April/22 and April/23. In situ the parameters of water temperature and transparency, salinity, pH, dissolved oxygen (DO), and phosphate and ammonia contents were obtained. The phyto-zooplankton was collected with a specific net and, in the laboratory, analyzed using a trinocular microscope with an attached camera. The presence of Escherichia coli was also verified. The results showed water with transparency characteristic of mesotrophic water, while the phosphate and ammonia contents were similar to those of eutrophic waters. 13 phytoplankton species were identified, distributed in the Cyanophyceae, Bacillariophyceae and Chlorophyceae Classes. As bioindicator species of eutrophicated waters were identified: Cylindrospermopsis raciborskii, Nitzschia sp., Chroococcus sp., Oscillatoria spp. and Ulothrix sp. Species diversity and richness were low, with significant evenness. As for the zooplankton, 18 species were identified, distributed in the Classes Eurotatoria, Copepoda, Branchiopoda, Tubulinea and Ostracoda. As bioindicator species: Brachionus calyciflorus, Filinia longiseta, Moina sp., Hexarthra sp. and Polyarthra sp. Diversity was medium, richness was low and evenness was significant. Microbiological analyzes showed the presence of E. coli. Overall, the waters of the Cocó River estuary were classified as Class 3 brackish and eutrophic.
25
Alkareem, Lubna A., and Anwaar A. Al-Dergazly. "Smartphone microscopy: Design and implementation of a dual magnification system." Sustainable Engineering and Innovation 6, no. 2 (2024): 239–48. http://dx.doi.org/10.37868/sei.v6i2.id365.
Full textAbstract:
This paper presents a dual magnification smartphone microscope designed for versatile imaging, enabling low magnification for wide-field viewing and high magnification for detailed biological sample analysis and automatic control of the working distance. It offers a cost-effective alternative to traditional lab microscopes, particularly in low-resource settings. Simulated, optimized, and designed using Ansys Zemax OpticStudio, the microscope was fabricated with 3D printing technology. Dual magnification (150x and 1000x) was achieved with two optical paths, improving resolution to 1 µm at higher and 1.5 µm at lower magnifications. The design provides clear and accurate images. The smartphone integration enhances usability, allowing easy magnification switching, image capture, and potential use of diagnostic applications.
26
Wang, Xiyu, Chuan Tang, Lin Liu, Yang Wang, Linmao Qian, and Lei Chen. "Development of a bending-stress-controllable micro-clamp and applications in nanowear study of polyimide terephthalate." Review of Scientific Instruments 93, no. 12 (2022): 123706. http://dx.doi.org/10.1063/5.0119394.
Full textAbstract:
Inner stress that exists in most natural and artificial materials, such as rocks, coatings, glasses, and plastic products, has a significant impact on their tribological properties at any length scale. Here, we designed a bending-stress controllable micro-clamp that can be applied in a high-vacuum atomic force microscope with limited chamber space for the investigation of stress-dependent nanowear behavior. By accurately quantifying the bending degree of the sample in different directions, the mutual transformation and adjustment of tensile or compressive stress could be realized. The stability of the micro-clamp structure was further verified by simulating the bending deformation state of the sample through Ansys calculations. The maximum applied scratch area on the bended sample surface where the variation of bending-induced stress below 5% was defined by the Ansys simulations. The consistency of polyimide terephthalate (PET) wear inside this defined region under both bending-free and bending states verified the stability and reliability of micro-clamp. Finally, the designed micro-clamp was applied to study the effect of bending deformation on friction and wear of PET in the atomic force microscope tests, where the tensile stress generated with bending deformation was found to facilitate the nanowear of PET material sliding against a diamond probe.
27
Aggarwal, Meenakshi, Hitant Vohra, and Poonam Singh. "Histomorphometry of human vermiform appendix." International Journal of Research in Medical Sciences 7, no. 2 (2019): 405. http://dx.doi.org/10.18203/2320-6012.ijrms20190343.
Full textAbstract:
Background: Acute Appendicitis is one of the most common acute abdominal conditions. Advances in modern radiographic imaging have improved diagnostic accuracy, however the diagnosis of appendicitis remains essentially an enigmatic challenege. Though much work has been done on morphometry but there is less work done on variation of histomorphometric features of appendix. Hence the study was carried out by keeping the following objectives in mind. Aim was to study the general histomorphology and measure the histomorphometric parameters of human vermiform appendix. And also, to study diagnostic significance of histomorphology and histomorphometric parameters in causing appendicitis.Methods: The study was conducted in the Department of Anatomy. Specimens of appendix were obtained from embalmed cadavers. Serial sections were taken at different levels and slides were prepared. The slides were then examined using Nikon Trinocular Research microscope under magnification power of 40x for various parameters, after staining with H&E.Results: The mean luminal diameter varied from 1.32±0.65mm at base to 1.22±0.72mm from base. Diffuse lymphatic tissue was seen in both mucosa and sub-mucosa.Conclusions: Definitely there is a relationship between lymphoid follicle diameter and mucosal-serosal thickness on one hand and that between the luminal diameter and lymphoid follicle diameter on the other hand. Since our study was restricted to geriatric age group so studies need to be done in different age groups to highlight any further relationship.
28
Febriyatin, Fierdausi Nur’Aini, Boedi Setiawan, Wiwik Misaco Yuniarti, Prima Ayu Wibawati, and Aditya Yudhana. "Occurrence of Anaplasma sp. infection in pigs (Sus scrofa) at Morgan Farm, Palangka Raya City." Journal of Basic Medical Veterinary 13, no. 2 (2024): 55–61. https://doi.org/10.20473/jbmv.v13i2.56944.
Full textAbstract:
This research was conducted to identify the occurrence of Anaplasma sp. infection in pigs (Sus scrofa) at Morgan Farm, Pahandut Subdistrict, Palangka Raya City. Palangka Raya City is one of the cities that has great potential to develop pig livestock, but the shortcomings of the farms in Palangka Raya City still apply traditional housing with poor cage sanitation. Samples in this study were obtained from Morgan Farm with a total of 68 pig blood samples, then examined at the Animal Health and Veterinary Public Health Laboratory of Palangka Raya City, then starting with the preparation of PBS solution and making blood review preparations using 10% Giemsa staining. The blood obtained was then reviewed using object glass, absolute methanol, and stained with Giemsa 10%. Identification was carried out using a trinocular microscope with a magnification of 400x and immersion oil was dripped on the object glass. The results of this research showed that 29 pig blood samples were positive out of 68 pig samples, with an occurrence rate of 42.6%. The morphology of Anaplasma sp. found is that there is a round, purplish-blue dot shape at the edge of red blood cells. From these results it can be concluded that the infection of Anaplasma sp. in pigs (Sus scrofa) at Morgan Farm, Pahandut District, Palangka Raya City is 42.6%, which means that the infection is very high for Palangka Raya City.
29
Garba, Yusuf. "Distribution of the African Malaria Vectors (Anopheline Mosquitoes) in Kontagora, North Central Nigeria." Journal of Applied Sciences and Environmental Management 27, no. 4 (2023): 787–91. http://dx.doi.org/10.4314/jasem.v27i4.21.
Full textAbstract:
Mosquitoes are responsible for the spread and transmission of several diseases including malaria, a dreaded disease that still affects nearly half of the world population. This study was conducted in Kontagora, a metropolitan urban settlement in North-Central Nigeria to evaluate the spartial and temporal distribution of Anopheline mosquitoes. Adult mosquitoes were collected from five (5) sampling sites widely located in Kwangwara, Tudun wada, Dadin kowa, Sabon gari and Usubu areas of Kontagora metropolis. The mosquitoes were morphologically identified to Anophelines using standard taxonomic keys with the aid of Trinocular Microscope. Data generated revealed that spartial distribution of Anopheline mosquitoes Mean ±SE across the study areas occurred in the following order of decreasing abundance; Kwangwara (11.25±1.03) > Tudun wada (9.30 ±0.77) > Sabon gari (8.96±0.78), > Dadin kowa (8.92±0.88) > Usubu (8.59±0.82) with no significant variation (P>0.05) between sampling locations. However, the monthly distribution of Anopheline mosquitoes revealed high abundance of Anopheline vectors Mean ±SE in August (14.00±2.91) and low abundance in March (3.80±1.57), with significant variation (p<0.05) between months. The distribution of Anopheline mosquitoes observed in the study area was more or less directly related to the distribution of breeding sites. Studies on vector distribution on a local scale was recommended for effective control intervention.
30
Mačák, Martin, Kamil Jasso, Petr Vyroubal, Tomáš Kazda, and Pavel Cudek. "Numerical Investigation of Cathode Structure Influence on Electrochemical Behavior of Lithium-Sulfur Battery." ECS Transactions 105, no. 1 (2021): 617–25. http://dx.doi.org/10.1149/10501.0617ecst.
Full textAbstract:
Nowadays, Lithium-Sulfur batteries are often considered as the next generation technology for energy storage systems. This article investigates the influence of the size of sulfur clusters present in the cathode on the battery overall electrochemical behavior. The properties of the cathode are studied by cyclic voltammetry simulations using a custom numerical model implemented into Ansys Fluent. The simulation is supplemented by experimental cyclic voltammetry measurements and images from a scanning electron microscope.
31
Chen, Chaojie, Kangjie Zheng, Yishuai Wang, et al. "Microscope Usability Evaluation Based on Fuzzy Analytic Hierarchy Process." Mathematical Problems in Engineering 2022 (June 23, 2022): 1–14. http://dx.doi.org/10.1155/2022/8643221.
Full textAbstract:
The basic position of microscope in experimental teaching is increasingly prominent, but there is still a big gap between its multidimensional index factors such as operation efficiency, effectiveness, and user satisfaction and the goal of teaching application. Based on the usability design theory, Kinovea video analysis software and ANSYS finite element analysis software were separately used to carry out user observation and product structure testing and analyze the multiple heterogeneous factors affecting the use of microscopes in teaching application scenarios and record usability data; the Fuzzy Analytic Hierarchy Process was utilized to summarize and analyze the usability data and construct a usability evaluation model of microscope. Under the guidance of the usability evaluation model, the microscope was optimized, and its usability was verified by Jack simulation and finite element analysis at last. The results show that: On the layer of operational efficiency, the usability index of intuitive operation and easy to learn of the microscope accounts for the largest weight. On the layer of effectiveness, the index of stable structural connection of the microscope has a larger weight; adjusting the material properties and product structure can effectively improve the stability of the microscope. On the layer of user satisfaction, the index of use comfortably of the microscope accounts for the largest weight, and the comfort of students’ neck and other joints can be improved by optimizing the microscope’s functional layout. This research provides an evaluation index reference and design optimization experience for the multiple heterogeneous factor-driven microscope usability design in teaching applications.
32
Gandhi, Rahul S., Anup B. Thakar, Harisha C. R, and Shukla V. J. "A Pharmacognostical and Pharmaceutical evaluation of Dhanyamla." International Journal of Ayurvedic Medicine 11, no. 4 (2020): 660–63. http://dx.doi.org/10.47552/ijam.v11i4.1577.
Full textAbstract:
Introduction: Dhanyamla is a medicated liquid preparation produced by fermentation process of various grains. Dhanyamla is cold at perception by its nature as it is a sour liquid and Ayurvedic classics opine that amla rasa is of cold nature if used externally. It is commonly used for management of Diabetic Polyneuropathy which commonly presents with burning sensation, loss of strength, loss of balance, loss of sensation, numbness etc. especially of feet. Materials and methods: Raw drugs of Dhanyamla as per the reference in Sahasrayogam were purchased from the local market of Jamnagar, Gujarat. It was prepared as per the standard preparation procedure at Department of Rasa shastra and Bhaishajya kalpana, IPGT&RA, GAU, Jamnagar. The final product was then subjected to pharmacognostical and pharmaceutical analysis. Pharmacognosy of Dhanyamla was carried out by preparing a slide made with glass slide and cover slip. Then this slide was observed under the Carl Zeiss Trinocular microscope. Organoleptic characters and physico-chemical parameters were noted. HPTLC was performed and observed under short UV (254 nm) and long UV (366 nm). Results: Pharmacognosy study of Dhanyamla revealed presence of starch content and oil globules. Analytical study of Dhanyamla showed 14 spots and 20 spots at 254 nm and 366 nm respectively. Specific Gravity, pH and total solid contents were 1.0033, 3.257 and 55.334 respectively. Discussion and conclusion: The presence of both carbohydrate and oil content would have been the reason of having soothing and mild nourishing effect.
33
Shrestha, Sushmita, Smriti Karki, Navin Agrawal, Mannu Vikram, Vimmi Singh, and Ashish Shrestha. "Prevalence of Different Types of Apical Root Canal Morphology and their Treatment Recommendations in an Institute." Journal of Nepal Medical Association 56, no. 210 (2018): 616–20. http://dx.doi.org/10.31729/jnma.3528.
Full textAbstract:

 Introduction: Canals can be of different shapes in cross section including round canals, oval canals, long oval canals or ribbon shaped canals. Recesses of nonround canals may not be included in the round preparation created by rotary instruments and thus they remain unprepared. The aim of this study included determination of shape and taper of the apical root canal based on diameter at different levels.
 Methods: This was a cross sectional study which used convenient sampling technique to determine the sample size. Seventy extracted teeth were sectioned horizontally at one, two and three millimeter from the apex using the diamond disc which was observed under trinocular research microscope for the determination of diameter of root canal under 10x magnification.
 Results: The most common canal configuration was oval. The taper of the canals was 25% in mesial root and 20% in distal in bucco-lingual orientation and 14% in mesial root and 15% in distal in mesio-distal orientation.
 Conclusions: The most prevalent canal configuration in this study was non round, however, most of the rotary instruments tend to prepare root canals into round shape making their use questionable. The taper of the root canals was found to be higher in our study than what most of the shaping instruments have to offer. So it would be advisable to consider this fact while selecting instruments and preparing these non-round canals as far as the Nepalese subpopulation is considered.
34
Kolhe, Shweta Abhijit, Sheetal Patani, Suchita S. Daokar, Tarun Kumar, Rakesh Ashok Pawar, and Sumit Vasant Dhope. "Evaluation of dimensional accuracy and surface roughness of lingual bracket slot –An in vitro study." IP Indian Journal of Orthodontics and Dentofacial Research 10, no. 3 (2024): 208–14. http://dx.doi.org/10.18231/j.ijodr.2024.037.
Full textAbstract:
The paradigm shift with the increasing number of adults and teens seeking aesthetic options for orthodontic treatment led to the increased demand for lingual orthodontics. When it comes to size and slot dimensions, lingual brackets are very different from labial brackets.With the rise of lingual orthodontics in our everyday practice, it's more critical than ever for practitioners to understand these potential bracket size variations. The resistance to sliding mechanics can occur if the contact angle between the archwire and bracket increases, this creates the need for precise bracket slot dimension. The amount of friction varies proportionally to the accuracy of the dimensions and the roughness of the bracket slot.To evaluate the precision of commercially available orthodontic lingual bracket slots in inch dimensions with manufacturers’ published dimensions using a stereomicroscope and to compare the surface roughness of commercially available orthodontic lingual bracket slots using an atomic force microscope.Lingual brackets from four different manufacturers were taken for evaluation of slot dimensions. Twenty brackets of each manufacturer were randomly selected. Trinocular Stemi 2000 Stereo Zoom Microscope with Digital Camera (Carl Zeiss, Germany) was used for measurement of bracket slot dimensions. An atomic Force Microscope (AFM) (Nanoscope® IV Di digital instrument, California, USA) was used to evaluate the surface roughness of lingual bracket slots. Comparison of dimensions between mesial processes and comparison of dimensions between distal processes showed that the difference was only marginal with no significant statistic value. Statistically significant results proved that slot dimensions were not precise as per the manufacturer’s standards for given lingual brackets and were oversized for all bracket systems. Statistically insignificant results showed that the bracket systems were similar concerning the surface roughness of the bracket.The analyzed series of lingual bracket systems exhibited significant differences with manufacturers’ standards in slot dimension, which will clinically result in torque play. Lack of standardization of slot dimensions during the manufacturing process may be clinically associated with undesirable tooth positioning and movement; inferring that the bracket systems were similar concerning the surface roughness of the bracket slot.
35
Wang, Jinwei, Yunpei Tian, and Jin Zhang. "Thermal insulating epoxy composite coatings containing sepiolite/hollow glass microspheres as binary fillers: morphology, simulation and application." Science and Engineering of Composite Materials 24, no. 3 (2017): 379–86. http://dx.doi.org/10.1515/secm-2014-0397.
Full textAbstract:
AbstractSepiolite and hollow glass microspheres (HGMs) are used as binary fillers to prepare thermal insulating composites to improve the protecting durability of epoxy composites on Mg alloy. Sepiolite can be evenly dispersed inside epoxy at around 10% (vol.%), while HGMs are also found evenly distributed in this matrix with content up to 45% (vol.%), as shown in the scanning electron microscope pictures. Their thermal stability and thermal insulation ability improve simultaneously with the increase of the inorganic filler, as shown in the thermal gravimetric analysis results and thermal insulting tests. According to the three-dimensional finite element analysis using ANSYS software (ANSYS Inc., USA), their thermal conductivity coefficients are found to decrease linearly with the increase in HGMs volume fractions. The tested temperature changes on the opposite side of the Mg alloy coated with sepiolite/HGMs/epoxy composites match well with those on the stimulant curves, indicating the reliability of the models and the thermal insulating functions provided by the fillers.
36
Šabacká, Pavla, Jiří Maxa, Robert Bayer, Tomáš Binar, and Petr Bača. "The Effect of Surface Roughness on Supersonic Nozzle Flow and Electron Dispersion at Low Pressure Conditions." Sensors 25, no. 13 (2025): 4204. https://doi.org/10.3390/s25134204.
Full textAbstract:
This study investigates supersonic flow within a nozzle under low-pressure conditions at the continuum mechanics boundary. This phenomenon is commonly encountered in applications such as the differentially pumped chamber of an Environmental Scanning Electron Microscope (ESEM), which employs an aperture to separate two regions with a great pressure gradient. The nozzle geometry and flow control in this region can significantly influence the scattering and loss of the primary electron beam traversing the differentially pumped chamber and aperture. To this end, an experimental chamber was designed to explore aspects of this low-pressure regime, characterized by a varying ratio of inertial to viscous forces. The initial experimental results obtained using pressure sensors from the fabricated experimental chamber were utilized to refine the Ansys Fluent simulation setup, and in this combined approach, initial analyses of supersonic flow and shock waves in low-pressure environments were conducted. The refined Ansys Fluent system demonstrated a very good correspondence with the experimental findings. Subsequently, an analysis of the influence of surface roughness on the resulting flow behavior in low-pressure conditions was performed on this refined model using the refined CFD model. Based on the obtained results, a comparison of the influence of nozzle roughness on the resulting electron beam scattering was conducted for selected low-pressure variants relevant to the operational conditions of the Environmental Scanning Electron Microscope (ESEM). The influence of roughness at elevated working pressures within the ESEM operating regime on reduced electron beam scattering has been demonstrated. At lower pressure values within the ESEM operating regime, this influence is significantly diminished.
37
Chen, Biao, Tie Lin Shi, Guang Lan Liao, and Zhi Jing Zhu. "Friction Welding of Zr41Ti14Cu12.5Ni10Be22.5 Bulk Metallic Glass and Temperature Field Simulation." Advanced Materials Research 528 (June 2012): 144–51. http://dx.doi.org/10.4028/www.scientific.net/amr.528.144.
Full textAbstract:
In order to enhance the application of bulk metallic glass (BMG) as engineer material, it is necessary to develop appropriate bonding technology to solve the problems of size limitation and weldability. In this work, a friction welding set-up was constructed, and the Zr41Ti14Cu12.5Ni10Be22.5 BMG rods were joined. The joint interface zone was examined by X-ray diffraction, Scanning electron microscope, Vickers Micro-hardness and Transmission electron microscope. The results showed that the BMG rods were successfully joined, where no crystallization and visible defects were observed. The welding joint maintained the amorphous structure except few nanocrystallines occurred. Then the temperature field simulation was executed using ANSYS finite element software to optimize the welding parameters. It indicated that friction time cannot exceed 0.25s under the given experiment conditions, otherwise the crystallization would occurred, which is in good agreement with the experiment. It is concluded that the temperature field simulation can be used to guide the experiment and the friction welding can be used to join the BMG.
38
Shi, Linquan, and Qiang Li. "Numerical simulation and experimental study of contact thermal resistance under high temperature conditions." Thermal Science and Engineering 5, no. 1 (2022): 1. http://dx.doi.org/10.24294/tse.v5i1.1523.
Full textAbstract:
Contact thermal resistance is an important indicator of the efficiency of heat transfer between contact interfaces.The contact thermal resistance between the interfaces of superalloy GH4169 in high temperature was investigated byusing ANSYS. The real surface morphology of superalloy was obtained with optical microscope, and its surface modelwas reconstructed in ANSYS. Based on the theory of structural mechanics, the elastoplastic deformation of the microstructure of the contact interface is simulated, and analyzed and obtained the contact thermal resistance between contactinterfaces. The effect of interface temperature on the radiative heat transfer between the contact interfaces was studied.At the same time, the impact of radiation heat transfer between contact interfaces in high temperature is considered.Finally, it was tested by using an experimental test device. The result show that the maximum deviation between thecontact thermal resistance and the contact thermal resistance was 12.60%, and the contact thermal resistance betweensuperalloy interfaces decreases with the increase of interface temperature and contact pressure; the contact interfacetemperature difference increases first and then decreases with the increase of interface temperature.
39
Vilkys, Tadas, and Vitalijus Rudzinskas. "THE MAIN GAS PIPELINES MECHANICAL DAMAGE INFLUENCE ON SAFE OPERATION / MAGISTRALINIO DUJOTIEKIO MECHANINIŲ PAŽEIDIMŲ ĮTAKA SAUGIAM EKSPLOATAVIMUI." Mokslas – Lietuvos ateitis 7, no. 6 (2016): 658–63. http://dx.doi.org/10.3846/mla.2015.888.
Full textAbstract:
The influence of mechanical damage of the gas transmission pipelines on safe pipelines operation was researched in the article. The paper presents the main pipelines damage types with actual parameters and influence on operational parameters. The main pipeline Kaunas – Kaliningrad part, which was removed as no longer usable, was analysed. This damaged part was removed and changed to a new part by a responsible company. The hardness measurement and micro hardness measurement, chemical analysis, impact strength test, metallography analysis with an optical microscope were used in experiments. The analysed pipeline part was also regenerated by the computer software ANSYS, which works by the finite elements method. Straipsnyje nagrinėjama magistralinių dujotiekių mechaninių pažeidimų įtaka saugiam jų eksploatavimui. Darbe pateikti pagrindiniai vamzdynų pažeidimo tipai su jiems būdingais bruožais ir įtaka eksploataciniams parametrams. Ištirta magistralinio dujotiekio Kaunas – Kaliningradas dalis, kuri buvo pašalinta, kaip nebetinkama naudojimui. Tyrimams pasitelktas kietumo ir mikrokietumo matavimas, cheminės analizės tyrimas, smūginio tąsumo bandymas. Mikrostruktūros tyrimams naudotas optinis mikroskopas. Tiriamasis objektas buvo atkurtas kompiuterinės programos, veikiančios baigtinių elementų metodu, ANSYS erdvėje.
40
TYAGI, KAOMUD, DEVKANT SINGHA, DEVKANT SINGHA, AVAS PAKRASHI, MOUMITA DAS, and VIKAS KUMAR. "Tryphactothrips rutherfordi (Bagnall) (Thysanoptera, Panchaetothripinae): first description of the male ." Zootaxa 4728, no. 3 (2020): 395–97. http://dx.doi.org/10.11646/zootaxa.4728.3.10.
Full textAbstract:
The subfamily Panchaetothripinae (family Thripidae) is represented by 140 species under 40 genera (Thrips Wiki 2019). In India, 36 species under 16 genera are recorded (Tyagi & Kumar 2016, Tyagi et al. 2017, Rachana and Varatharajan, 2018, Johnson et al. 2019). The members of this subfamily are leaf-feeders and usually dark brown in colour with strongly reticulate sculpture on body, terminal antennal segments needle-shaped, tarsi 1- or 2-segmented, fore wing upper vein fused with costa. The genus Tryphactothrips was established by Bagnall (1919), and this genus remains monobasic with only Dinurothrips rutherfordi Bagnall from Sri Lanka as the type species. The genus Tryphactothrips can be distinguished from related genera by the presence of sculptured round areolae on abdominal segments. It is closely related to Anisopilothrips Stannard & Mitri but can be identified by paired sigmoidal setae on abdominal tergites (absent in Anisopilothrips), mesonotum without complete median longitudinal split (complete median longitudinal in Anisopilothrips). Recently, a series of both sexes of Tryphactothrips rutherfordi with banded fore wings was collected on fern from Kerala state of India. Females were identified using published keys (Wilson 1975), and the male is here described for the first time. DNA was isolated from the studied specimens and partial fragment of mtCOI gene was amplified and sequenced (Tyagi et al. 2017). Four sequences were submitted in the GenBank (Accession No. MN627201 to MN627204). Photographs and illustrations were taken through a Leica Trinocular Microscope (Leica DM-1000) using Leica software application suite (LAS EZ 2.1.0). The studied specimens were deposited in the National Zoological Collections (NZC), Zoological Survey of India, Kolkata, India.
41
Prodan, A. M., and T. K. Golovata. "Morphological changes in the abdominal organs after left gastric artery embolization in an experiment." Bukovinian Medical Herald 27, no. 4 (108) (2023): 74–77. http://dx.doi.org/10.24061/2413-0737.27.4.108.2023.14.
Full textAbstract:
Objective – to experimentally evaluate the morphological changes of internal organs (liver, spleen, duodenum, pancreas) after embolization of gastric arteries.Material and methods. To conduct the experiment, 10 Vietnamese pigs aged 4-5 months, female, were selected and fed a high-fat diet for 2 months to simulate obesity. Aorta contrast and celiacography with "Vazipak" solution (5-10 ml per injection) were performed on animals under general anesthesia. Superselective bariatric embolization of the left gastric artery was performed with a 3F microcatheter. After 3 weeks, a morphological (hematoxylin-eosin staining) examination of such organs as liver, duodenum, spleen, pancreas was performed. Photofixation of the histopreparations of the relevant organs was carried out using a trinocular microscope of laboratory class Nikon Eclipse Ci-E with 10x, 20x and 40x plan achromat objectives.Results. In general, no macroscopic signs of ischemia of adjacent organs were noted against the background of the performed selective embolization of the left gastric artery. Blood filling of the liver was uneven, the perisinusoidal spaces were expanded, which indicated its edema. In the duodenum, reactive disturbances of microcirculation were manifested by expansion and congestion of venous vessels and blood stasis. Microscopic changes in the spleen were characterized by congestion of the sinusoids, while the vessels of the pancreas were unevenly filled with blood, and at the same time, venous congestion prevailed.Conclusion. Microcirculation disorders, dystrophic changes, and signs of a shock reaction, which can be considered transient, occur in the examined organs after embolization of the gastric arteries. These data indicate the safety of performing selective embolization of gastric arteries and the absence of signs of critical redistribution of blood flow or ischemia "robbing".
42
Zhou, Sheng Gang, and Pei Xian Zhu. "Application of ANSYS in Electric Field Distribution of Ti-Al Layered Composite Materials." Advanced Materials Research 583 (October 2012): 167–70. http://dx.doi.org/10.4028/www.scientific.net/amr.583.167.
Full textAbstract:
This paper changed the matrix structure model of traditional electrode materials from the the composition of the internal structure of the matrix, used solid-solid compound method of hot pressing diffusion welding for sandwich type structure Ti-Al layered composite materials, The Ti/IrO2-Ta2O5 were got by typical oxygen evolution model coating ingredient(mole ratio of Ir to Ta was 7:3). Microstructure of the layered composite materials was studied by scanning electron microscope (SEM) and Energy Dispersive Spectrometer (EDS), and then the current distribution performance as the anode material for nickel electrowinning in NiSO4-H2SO4 system was characterized by electric analysis module of ANSYS program . The results showed that, The findings indicate that the interface formation of Ti-Al layered composite materials was a reaction-diffusion process. In the technology conditions of this subject, the phase of interface was Al3Ti. Compared with the traditional DSA (Dimensionally Stable Anode) titanium anode, the Ti-Al layered composite anode showed a more uniform current distribution performance.
43
Bolló, Betti, Ferenc Sarka, and Katalin Voith. "Egy egyszerűsített fékmodell termikus elemzése." Gép 75, no. 1 (2024): 19–22. http://dx.doi.org/10.70750/gep.2024.1.4.
Full textAbstract:
Braking system is one of the important safety components of a railway vehicle. Brake components slow the train by using friction between the train wheels and the brake block. The efficiency of the braking system is strongly dependent on the quality of the material of the components, especially the brake blocks. In the present paper, we have carried out optical microscope investigations of a brake block. On the other hand, numerical simulation was used to analyse the frictional heat distribution in the brake block using the Ansys software package. In the initial phase of the research, it was found that the software is suitable for calculating the frictional heat and for modelling heat transfer and heat conduction.
44
Tuncer, Seda Arslan, Ahmet Çınar, Merve Erkuş, and Taner Tuncer. "Deep Multi-Modal Fusion Model for Identification of Eight Different Particles in Urinary Sediment." Applied Computer Systems 29, no. 1 (2024): 35–44. http://dx.doi.org/10.2478/acss-2024-0005.
Full textAbstract:
Abstract Urine sediment examination (USE) is an essential aspect in detecting urinary system diseases, and it is a prerequisite for diagnostic procedures. Urine images are complex, containing numerous particles, which makes a detailed analysis and interpretation challenging. It is crucial for both patients and medical professionals to conduct urine analysis automatically, quickly and inexpensively, without compromising reliability. In this paper, we present a deep multi-modal fusion system, commonly employed in artificial intelligence, capable of automatically distinguishing particles in urine sediment. To achieve this objective, we first created a new dataset comprising erythrocytes, leukocytes, yeast, epithelium, bacteria, crystals, cylinders, and other particles (such as sperm). The data were gathered from urinalysis requests made between July 2022 and September 2022 at the biochemistry laboratory of Fethi Sekin Medical Center Hospital. A dataset containing 8509 images was compiled using the Optika B293PLi microscope with trinocular brightfield. We propose a 5-step process for detecting particles in the dataset using a multi-modal fusion deep learning model: i) The obtained images were augmented by applying affine transformation. ii) To distinguish images, we opted for ResNet18 and ResNet50 models, which yielded high performance in medical data. iii) Feature vectors from both models were fused to generate more consistent, accurate, and useful particle features. iv) We employed ReliefF, Neighborhood Component Analysis (NCA), and Minimum-Redundancy Maximum-Relevancy (mRMR) feature selection methods, widely used to determine features that maximise particle discrimination success. v) In the final step, Support Vector Machine (SVM) was utilised to distinguish the particles. The results demonstrate that the highest accuracy value achieved is 98.54 % when employing the ReliefF algorithm. Contributions of the study include eliminating standardisation differences in manual microscopy, achieving high accuracy in particle discrimination, offering an artificial intelligence-based system applicable in laboratory environments, and providing the dataset as educational and practical material for biochemistry professionals.
45
Zhao, Chun Yang, Hong Zhi Zhang, Li Jun Yang, and Yang Wang. "Curve Cutting ZrO2 Ceramic and Cooling Lower Surface Cutting Silicon Wafer with Laser Induced Thermal-Crack Propagation." Applied Mechanics and Materials 711 (December 2014): 222–26. http://dx.doi.org/10.4028/www.scientific.net/amm.711.222.
Full textAbstract:
In laser induced thermal crack propagation (LITP) cutting brittle materials, according to the laser absorption ability, materials are divided into the body absorption and surface absorption. This paper indicates the fracture mechanism of LITP cutting surface absorption brittle materials. The crack extension appears in the lower surface firstly in this stress distribution state, then the crack extends to the upper surface and the laser scanning direction with the LITP cutting. The stress field of cutting ZrO2 ceramic is studied by finite element software ANSYS. The crack propagation process of cutting silicon wafer is studied by finite element software ABAQUS. According to the fracture mechanism, the curve cutting the ZrO2 ceramic experiments and the cooling lower surface cutting the silicon wafer experiments are carried out in this paper. Optical microscope and laser scan confocal microscope (LSCM) photographs of the curve path the ZrO2 ceramic and separation surface cutting the silicon wafer are obtained to examine the cutting quality. The quality of the curve path is very good. The quality of the separation surface in cutting the silicon wafer with the cooling lower surface is better than conventional environment.
46
Chen, Yamin, Dianyang Li, Yougen Chen, and Hui Fang. "Polyethylene Glycol Diacrylate Adapted Photopolymerization Material for Contact Lens with Improved Elastic Modulus Properties." Materials 18, no. 4 (2025): 827. https://doi.org/10.3390/ma18040827.
Full textAbstract:
Four kinds of silicone hydrogel transparent contact lenses (CLs) with different formulations were prepared by the free radical photocuring polymerization. By mixing polyethylene glycol diacrylate (PEGDA) of 1000 Da with ethylene glycol dimethacrylate (EGDMA) and adding other silicone monomers and hydrophilic monomers, the transparency and flexibility of the material were successfully achieved. By optimizing the weight percentage of each component, the best balance of optical performance can be achieved. The photocuring properties of the materials were characterized by electronic universal test, double-beam UV-visible spectrophotometer, Atomic Force Microscope (AFM), Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results showed that the addition of higher PEGDA content reduces the elastic modulus, improves curing efficiency, improves equilibrium water content (EWC), and enhances light transmission. Hydrogels containing only high PEGDA but no EGDMA showed similar curing rates, water content, and elastic modulus, but had the worst optical transparency, far inferior to the materials mixed with PEGDA and EGDMA. Additionally, imaging performance of the CLs was further evaluated through simulation analysis using Ansys Zemax OpticStudio2024 software. This research provides a new choice of material consideration to improve the performance and wearing comfort of CLs.
47
Hu, Ting Chun, Jia Fei Wang, Yi Yun Xi, and Yu Feng Sun. "Research on Failure Mechanism and Thermal Stress of Thin-film Thermocouple at High Temperature." Key Engineering Materials 905 (January 4, 2022): 184–91. http://dx.doi.org/10.4028/www.scientific.net/kem.905.184.
Full textAbstract:
Aiming at the reliability of thin-film thermocouples applied to turbine blades at high temperatures, combined with high-temperature tests and finite element analysis, this paper studies its failure mechanism and thermal stress under thermal load. Multi-layer thin-film thermocouple samples were prepared on ceramic substrate, and high-temperature tests were carried out under different temperature loads, and the phenomenon of film shedding and cracking was observed using electron microscope. This paper analyzes the failure mechanism of the film sensor based on the function and structure, and uses ANSYS to analyze the thermal stress distribution of the film under high temperature load. Combining several existing theoretical models, this paper analyzes the factors affecting the thermal stress of the film and conducts simulation verification.
48
Deng, Na, Ming Gang Wang, and Zhan Kui Zhao. "Interfacial Behavior of Micro-Cellular Structural Al90Mn9Ce1/TiO2 Composite Prepared by Spark Plasma Sintering." Materials Science Forum 749 (March 2013): 589–94. http://dx.doi.org/10.4028/www.scientific.net/msf.749.589.
Full textAbstract:
With micron Al90Mn9Ce1 alloy powder clad by TiO2 nanopowder, a dense closed micro-cellular ceramics structure was fabricated. The alloy composite was filled inside by spark plasma sintering at temperature 793 K, and with the composite density of 98.2%. Micro-temperature area of Al90Mn9Ce1/ TiO2 matrix was simulated through ANSYS, and the macro lower temperature sintering mechanism was analyzed. The microstructure of the interface was investigated via scanning electron microscope, and the composition distribution of the interface was investigated via energy dispersive spectrometry. The formation and evolution of the interfaces were analyzed from plastic deformation, the interface creep, interfacial diffusion and other aspects. It was found that the application of DC pulse current has important effect on interfacial behavior and the performance of composite.
49
Jurasz, Zbigniew, and Janusz Juraszek. "Residual Stresses in Cast Ni-Cr Alloys-Ceramics Joints with an Intermediate Layer." Advances in Science and Technology 45 (October 2006): 1551–57. http://dx.doi.org/10.4028/www.scientific.net/ast.45.1551.
Full textAbstract:
The results of residual stresses in biocompatible cast Ni-Cr alloys-ceramics joints with an intermediate layer with thickness of about 10μm are discussed. To the experiment were used specimens with dimensions of 45×3×10 mm and 45×4×10 mm made of Cr-Ni alloys-ceramics joint both with and without of application of an intermediate layer. The examinations were carried out by means of metallographical microscope, testing machine and X-ray diffractometer. The measurement of residual macrostresses was carried out by using sin2ψ method. The obtained experimentally values of residual macrostresses are in good agreement with results of numerical simulation performed by means of FEM ANSYS package. The researches have been shown that application of an intermediate ceramics layer influence on increase of strength properties of Ni-Cr alloys-ceramics joints.
50
Chen, Xiong, Hai Feng Xue, and Hua Liang. "Thermal Response and Ablation Research of EPDM Thermal Protection Material in Ramjet." Advanced Materials Research 1092-1093 (March 2015): 534–38. http://dx.doi.org/10.4028/www.scientific.net/amr.1092-1093.534.
Full textAbstract:
Thermal protection materials are required to preserve the metal components of motor that suffer severe heat load. The research on thermal response of insulation of ramjet combustion chamber was carried out by the ground test and numerical simulation. During the working time of the ramjet, the back-face temperature of the thermal protection material was measured. The scanning electron microscope of samples was investigated. The calculation of thermo-chemical flow was solved by the CFD software FLUENT to provide the heat load boundary for simulation of heat transfer of EPDM insulation. The heat transfer model was solved by the FEA software ANSYS. Comparison of the temperature profile at the ablating surface between calculation and measurement shows the two results agree with each other. The simulation results can provide the temperature rising trend of insulation in a certain extent.