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Journal articles on the topic 'SEM Photomicrograph'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Saha, Pamela, Md Aziz, and D. Maity. "Notes on the Occurrence of Timmiella (De Not.) Limpr., In Darjeeling District: A New Generic Record from Eastern Himalaya." Indian Journal of Forestry 40, no. 4 (2017): 413–18. http://dx.doi.org/10.54207/bsmps1000-2017-j60354.

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Timmiella anomala (B.S.G.) Limpr. is recorded new from Darjeeling district, West Bengal in Eastern Himalaya. A detailed description of the taxon with illustration, photomicrograph, SEM micrographs, along with note and discussion for its status is presented.

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Li, Qiang, You Jun Zheng, Jin Feng Xia, Dan Yu Jiang, Hao Wu, and Chang Lian Wang. "Structure and Characteristics of Spherical-Pore Silicon Carbide." Key Engineering Materials 492 (September 2011): 142–45. http://dx.doi.org/10.4028/www.scientific.net/kem.492.142.

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Sintered Silicon Carbide material with fine grain structure shows excellent wear resistance, highly chemically resistance, excellent performance in a wide range of applications. This material can improve upon the exceptional corrosion and erosion resisting properties through the addition of unique micro pores. A designed spherical-pore Silicon Carbide material was obtained after pressureless sintering. The photomicrograph shows a typical appearance of unique micro pore. SEM was also employed to investigate the micro-structure of as-prepared SiC material. The properties of micro-pore Silicon Ca

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Asokan, Manivannan, Sasikumar Rathinasabapathy, Shaik Dawood Abdul Khadar, and Mohammed Sadique Khan. "Novel Combined Feeding Approach to Produce Quality Al6061 Composites for Heat Sinks." High Temperature Materials and Processes 38, no. 2019 (2019): 647–50. http://dx.doi.org/10.1515/htmp-2019-0009.

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AbstractThis elementary work aims to address agglomeration and non-uniform dispersion of reinforcement particles in stir casting using Al6061 alloy (AA 6061) as a matrix and Aluminium oxide (Al2O3) as reinforcement particles. A novel combined feeding method of Encapsulate feeding technique & Two Step Stir Casting was developed & attempted to produce good quality composites by varying weight fractions of Aluminium Oxide (0 to 5 wt.%). The wetting agent Mg (2 wt.%) added in all castings to ensure better binding between ceramics and matrix. The SEM photomicrograph ensures homogenous dispe

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S., ABRAKASA, MEMUDUAGHAN Ani, and M. INYANG Michael. "Morphology of Pores in Reservoirs of Some Oil Fields." Journal of Scientific and Engineering Research 10, no. 3 (2023): 34–39. https://doi.org/10.5281/zenodo.10455733.

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<strong>Abstract </strong>Some reservoir samples of the Agbada Formation and corresponding equivalent of the Nanka Formation outcrops were subjected to SEM (scanning electron microscopy) analysis to unravel the clay mineral and authigenic cements that could be present in the detrital grains and the inner surfaces of the pores. Samples were prepared in 10mm by 30mm sizes, samples were polished and coated for clearer imaging. Photomicrograph of samples show the presence of webby smectite, needle-like chlorite and ribbons of filamentous illites on the detrital grains and pore space between the gr

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Barish, Leo. "The Internal Structure of Coir (Coconut) Fiber." Proceedings, annual meeting, Electron Microscopy Society of America 43 (August 1985): 644–45. http://dx.doi.org/10.1017/s0424820100119910.

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The source of commercial coir fiber (actually, a vascular strand) is the massive fibrous husk (3-5 cm thick) surrounding the coconut. This paper reports a SEM study of some aspects of this interesting fiber. The specimens were sputter coated with Au Pd and observed with 4 KV accelerating voltage.A cut cross section of a retted coir fiber is seen in Figures 1 and 2. A high degree of porosity is apparent; a core of the vascular or conductive bundle is seen surrounded by a large area of elongated sclerenchymatous cells which are cemented together into a composite with pectins or hemicelluloses.Th

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Duraisamy, Pradeepa, Aswani Ram Vinod, Keerthika S., and Dhana Rangesh Kumar V. "EXTRACTION, CHARACTERIZATION, ANTIMICROBIAL ACTIVITY OF CHITOSAN EXTRACTED FROM CRAB SHELL AND PREPARATION OF CHITOSAN-BASED BIOPLASTIC FILM FOR FOOD PACKAGING." Journal of Advanced Scientific Research 13, no. 01 (2022): 263–68. http://dx.doi.org/10.55218/jasr.202213130.

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A novel synthesis of eco-friendly bioplastic film made of chitosan extracted from crab shell is presented in the current study. Crab shell use can result in a reduction in marine waste management. The extracted chitosan has a broad variety of applications in the food industry as a food preservative due to its antibacterial function. A novel procedure for preparing chitosan from crab shells was developed. In the present study, chitosan extracted from crab shell through deproteinization, demineralization and followed by deacetylation. Characterization of extracted chitosan was done by FTIR, and

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OHKITA, KAZUYA, and HITOSHI TAKAGI. "FLEXURAL PROPERTIES OF INJECTION-MOLDED BAMBOO/PBS COMPOSITES." International Journal of Modern Physics B 24, no. 15n16 (2010): 2838–43. http://dx.doi.org/10.1142/s0217979210065726.

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In recent years, from an environmental perspective, there has been increasing interest in the change to a sustainable society. The use of natural-fiber-reinforced biodegradable composites has been proposed as one solution. Bamboo is an often used renewable bio-resource; it has an inherent advantage of rapid growth. Polybutylene succinate ( PBS ), used as matrix resin, has biodegradable characteristics. This paper describes flexural properties of bamboo/ PBS composites prepared by injection molding. The following results were obtained. The flexural modulus was improved with increasing bamboo po

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Jena, B. K., N. Gupta, B. Singh, and G. S. Ahoo. "Mechanical properties of low alloy high phosphorus weathering steel." Journal of Mining and Metallurgy, Section B: Metallurgy 51, no. 1 (2015): 81–87. http://dx.doi.org/10.2298/jmmb140120005j.

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Mechanical behaviour of two low alloy steels (G11 and G12) was studied with respect to different phosphorus contents. Tensile strength and yield strength increased while percentage elongation at fracture decreased on increasing phosphorus content. The SEM and light optical photomicrograph of low phosphorus steel (G11) revealed ferrite and pearlite microstructure. On increasing phosphorus content from 0.25 wt.% to 0.42 wt.%, the morphology of grain changed from equiaxed shape to pan-cake shape and grain size also increased. The Charpy V notch (CVN) impact energy of G11 and G12 steel at room tem

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DeMiglio, D. S. "Chemical Classification and Particle Sizing of Foundry Sands." Proceedings, annual meeting, Electron Microscopy Society of America 43 (August 1985): 388–89. http://dx.doi.org/10.1017/s0424820100118813.

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Much progress has been made in recent years towards the development of closed-loop foundry sand reclamation systems. However, virtually all work to date has determined the effectiveness of these systems to remove surface clay and metal oxide scales by a qualitative inspection of a representative sampling of sand particles. In this investigation, particles from a series of foundry sands were sized and chemically classified by a Lemont image analysis system (which was interfaced with an SEM and an X-ray energy dispersive spectrometer) in order to statistically document the effectiveness of a rec

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Sulardjaka, Sri Nugroho, Suyanto, and Deni Fajar Fitriana. "Investigation of Mechanical Properties of Al7Si/ SiC and Al7SiMg/SiC Composites Produced by Semi Solid Stir Casting Technique." MATEC Web of Conferences 159 (2018): 02036. http://dx.doi.org/10.1051/matecconf/201815902036.

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Mechanical characteristic of silicon carbide particle reinforced aluminum matrix composites produced by semi solid stir casting technique was investigated. Al7Si and Al7SiMg were used as metal matrix. High purity silicon carbida with average particle size mesh 400 was used as reinforcement particle. Aluminum matrix composites with variation of SiC: 5 %, 7.5 % and 10 % wt were manufactured by the semi solid stir casting technique. Stiring process was performed by 45 ° degree carbide impeller at rotation of 600 rpm and temperature of 570 °C for 15 minutes. Characteritation of composites specimen

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Fitriani, Lili, Sherly Ramadhani, and Erizal Zaini. "PREPARATION AND CHARACTERIZATION OF SOLID DISPERSION FAMOTIDINE – MANNITOL BY CO-GRINDING METHOD." Asian Journal of Pharmaceutical and Clinical Research 10, no. 3 (2017): 249. http://dx.doi.org/10.22159/ajpcr.2017.v10i3.16112.

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ABSTRACTObjective: This study aims to prepare and characterize solid dispersion of famotidine using mannitol to enhance the solubility and dissolution rate.Methods: Solid dispersions were prepared by co-grinding method in 9 formulas. The ratio of famotidine and mannitol was varied (1:1, 1:2, 2:1 w/w),and each ratio was milled at three different times (30, 60, and 90 minutes). The physical mixture was also prepared as comparison at ratio 1:1 w/w.Solid dispersions were characterized by X-ray diffraction analysis, Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry(D

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Sulistyowaty, Melanny Ika, Dwi Setyawan, Retno Sari, Abhimata Paramanandana, Nofika Agung Maharani, and Timbul Partogi Simorangkir. "Preparation and Physicochemical Characterizations of p-Methoxycinnamic acid – Succinic Acid Cocrystal by Solvent Evaporation Technique." Open Access Macedonian Journal of Medical Sciences 10, A (2022): 1444–49. http://dx.doi.org/10.3889/oamjms.2022.10193.

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Background: PMCA (p-Methoxycinnamic acid) is an active pharmaceutical ingredient derived from Kaempheria galanga L (known as kencur in Indonesia), which is poorly soluble in water. It can cause problems in the development of pharmaceutical dosage forms. Several methods have been carried out to increase the solubility of PMCA such as complex formation with β-cyclodextrin, or solid dispersion. The cocrystal formation method is a solubility enhancement method that has been developed recently. Aim: The aim of the study was the preparation and physicochemical characterization of PMCA co-cryst

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Tutino, Valeria, Isabella Gigante, Rosa Anna Milella, et al. "Flavonoid and Non-Flavonoid Compounds of Autumn Royal and Egnatia Grape Skin Extracts Affect Membrane PUFA’s Profile and Cell Morphology in Human Colon Cancer Cell Lines." Molecules 25, no. 15 (2020): 3352. http://dx.doi.org/10.3390/molecules25153352.

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Grapes contain many flavonoid and non-flavonoid compounds with anticancer effects. In this work we fully characterized the polyphenolic profile of two grape skin extracts (GSEs), Autumn Royal and Egnatia, and assessed their effects on Polyunsaturated Fatty Acid (PUFA) membrane levels of Caco2 and SW480 human colon cancer cell lines. Gene expression of 15-lipoxygenase-1 (15-LOX-1), and peroxisome proliferator-activated receptor gamma (PPAR-γ), as well as cell morphology, were evaluated. The polyphenolic composition was analyzed by Ultra-High-Performance Liquid Chromatography/Quadrupole-Time of

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Sulardjaka, Sulardjaka, and Deni Fajar Fitriana. "PENGARUH KONSENTRASI NaOH DAN WAKTU PENAHANAN TERHADAP KARAKTERISTIK ZEOLIT YANG DISINTESIS DARI LIMBAH GEOTHERMAL." Reaktor 17, no. 1 (2017): 17. http://dx.doi.org/10.14710/reaktor.17.1.17-24.

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Abstract THE EFFECT OF CONCENTRATION OF NaOH AND HOLDING TIME ON CHARACTERISTIC OF ZEOLIT SINTHESIZED FROM GEOTHERMAL WASTE. Objective of this research is to investigate the effect of concentration of NaOH and holding time on the characteristic of synthesized zeolite from geothermal waste. Geothermal waste was used as silica source and hydrothermally processed for zeolite synthesized. Variation concentration of NaOH was 1.67, 3, and 5 M and variation of holding time are 1, 3, and 5 hours. Synthesized products were characterized by XRD, FTIR and SEM photomicrograph. It can be concluded that the

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Alakshar, Asmaa, Abdul Rahman Mohammed Saleh, and Mehmet Omer Gorduysus. "Debris and Smear Layer Removal from Oval Root Canals Comparing XP-Endo Finisher, EndoActivator, and Manual Irrigation: A SEM Evaluation." European Journal of Dentistry 14, no. 04 (2020): 626–33. http://dx.doi.org/10.1055/s-0040-1714762.

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Abstract Objective This study aimed to assess and compare XP-Endo Finisher (XP) cleaning efficiency with respect to the amount of remaining debris and smear layer versus Max-I-Probe needle (CI), EndoActivator device (EA), and combination of XP-Endo Finisher file with EndoActivator device (XP+EA) in oval root canals. Materials and Methods This in vitro study was performed on 36 extracted single root/canal mandibular premolars. Radiographic images were taken in buccolingual and mesiodistal projections to evaluate the shape of the root canal and determine whether it met exclusion criteria. All te

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Guo, Jun, Xincheng Mi, Guorui Feng, et al. "Study on Mechanical Properties and Weakening Mechanism of Acid Corrosion Lamprophyre." Materials 15, no. 19 (2022): 6634. http://dx.doi.org/10.3390/ma15196634.

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In order to study the weakening mechanism and mechanical behaviors of hard lamprophyre of Carboniferous Permian coal-bearing strata in China’s mining area, lamprophyre samples were subjected to static rock dissolution experiments with pH values of 0, 2, and 4. The acid corrosion mechanism of lamprophyre was revealed from the weight changes of samples, characteristics of solution ion concentration, and macro-mechanical properties. The experimental results show that reaction occurred between lamprophyre and acid solution. With the increasing concentration of H+, the reaction was more intense, th

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Sweet, Walter C. "Scanning electron microscopy and photomicrography." Paleontological Society Special Publications 4 (1989): 351–55. http://dx.doi.org/10.1017/s2475262200005347.

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In the last two decades, scanning electron miocroscopy has come to be the technique of choice in studies of microfossil structure and morphology. Scanning electron microscope (SEM) photomicrographs are easy to produce, have great depth of field, and resolve minute details over a wide range of magnifications. Hence photomicrographs of images produced in a SEM are now more widely used than ordinary photographs in the illustration of microfossils. Techniques for preparation, mounting and manipulation of specimens in the SEM vary with the instrument available, aims of the study, and skill of the o

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Khan, Atiquzzaman, and Rubaba Ahmed. "Smear Layer Removal Efficacy of EDTA and Citric Acid in Endodontics." Update Dental College Journal 13, no. 2 (2023): 9–14. http://dx.doi.org/10.3329/updcj.v13i2.64888.

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Introduction: Smear layer is formed by organic and inorganic components generated during endodontic instrumentation. Smear layer has many deleterious effects on the success of root canal treatment. So removal of smear layer is advocated. Sodium Hypochlorite (NaOCl) and a chelating agent like Ethylene Diamine Tetra Acetic Acid (EDTA) or Citric Acid is commonly used alternatively to remove smear layer. But the alternate use increase dentine erosion in root canal surface. This in vitro study attempts to compare the smear layer removal efficacy of 15% EDTA & 10% Citric Acid as a final rinsing

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Khan, Haris A., Abid Hassan, M. B. Saeed, Farrukh Mazhar, and Imran A. Chaudhary. "Finite element analysis of mechanical properties of woven composites through a micromechanics model." Science and Engineering of Composite Materials 24, no. 1 (2017): 87–99. http://dx.doi.org/10.1515/secm-2014-0266.

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AbstractIn a woven fabric composite, arrangement and behavior of the fibers contained in the yarn and the yarns themselves lead to an intricate deformation mechanism. The current research, therefore, intends to propose a simplified mathematical micromechanics model for calculating mechanical properties of the plain weave composite using finite element analysis (FEA). A repetitive volume element (RVE) cell approach has been adopted for properties evaluation of plain weave composites. The FEA allows the modeling and portrayal of fabrics by taking into account various geometric parameters such as

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Smith, Ronald W. "Microscopy of Rubber Products." Rubber Chemistry and Technology 75, no. 3 (2002): 511–26. http://dx.doi.org/10.5254/1.3547680.

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Abstract This paper is a review of published literature containing some aspects of rubber product analysis using microscopy techniques. This includes close-up photography, photomicrography, photomicrography obtained from light optical microscope (LOM), scanning electron microscope (SEM) and transmission electron microscopy (TEM). Products represented are tires, belts, hoses, seals, rubber bands, balloons and some miscellaneous products such as a submarine hydrophone boot, rubber mat, shoe soles, tire curing bladder, and roofing membrane.

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Nayak, N. C., and D. K. Tripathy. "Morphology and Physical Properties of Closed-cell Microcellular Ethylene-octene Copolymer: Effect of Precipitated CaCO₃ Filler and Blowing Agent." Cellular Polymers 19, no. 4 (2000): 271–86. https://doi.org/10.1177/026248930001900403.

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The morphology of the microcellular ethylene-octene copolymer (Engage®) of both unfilled and precipitated calcium carbonate filled compounds has been studied from SEM photomicrographs with variation of blowing agent and precipitated CaCO3 filler loading. The average cell size, maximum cell size and cell density varies with variation of blowing agent and filler loading. Physical properties like relative density, hardness, tensile strength, elongation at break, modulus, tear strength decreases with blowing agent concentration. The elastic nature of closed cells reduces the hysteresis loss compar

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Wilcox, W. Wayne, and Allison Brier. "Fixation Improves Image of Fungal Hyphae in Sem." IAWA Journal 8, no. 1 (1987): 78–79. http://dx.doi.org/10.1163/22941932-90001031.

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The unnatural, collapsed appearance of fungal hyphae in most published photomicrographs of wood examined by SEM can be overcome by glutaraldehyde fixation, as if being prepared for TEM, resulting in micrographs of more normal, turgid-appearing hyphae occupying their natural position in the lumen, rather than being flattened against the cell wall.

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Downs, Donna A., Aly El-Shiekh, Paul A. Tucker, and John C. Russ. "Analysis of interference patterns in acoustic photomicrographs." Proceedings, annual meeting, Electron Microscopy Society of America 47 (August 6, 1989): 370–71. http://dx.doi.org/10.1017/s0424820100153828.

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Images from the Scanning Acoustic Microscope (SAM) have been used previously to study fiber orientations in opaque matrices. SAM images are superficially similar to reflected light images. They also frequently exhibit interference patterns which can be used for quantitative analysis. These patterns arise at discontinuities near or intersecting the specimen surface, and result from interference between acoustic waves reflecting from subsurface boundaries and from the specimen surface. For the case of fibers intersecting a planar surface, the position of the interference fringes gives the orient

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Shashikala, K., BS Keshava Prasad, and Anukriti Tyagi. "Evaluation of Effectiveness of Cleaning of Root Canals using Protaper and K3 Rotary Systems: A SEM Study." World Journal of Dentistry 6, no. 1 (2015): 20–25. http://dx.doi.org/10.5005/jp-journals-10015-1307.

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ABSTRACT The aim of this in vitro study was to compare the debris and smear layer removal following root canal preparation using two different rotary systems with scanning electron microscope (SEM). The rotary systems used were Protaper and K3. Forty single rooted permanent mandibular premolars were chosen for the study. They were assigned two groups on the basis of instrumentation used. The teeth were sectioned at the level of cementoenamel junction and instrumented with Protaper in group A and with K3 in group B. The root canals were thoroughly irrigated with 5 ml of 2.5 % NaOCl during instr

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Cameron, D. W., R. H. Jeal, and D. W. Hoeppner. "SEM Investigations of Fatigue Crack Propagation in RR 58 Aluminum Alloy." Journal of Engineering for Gas Turbines and Power 107, no. 1 (1985): 238–41. http://dx.doi.org/10.1115/1.3239689.

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Aluminum alloy RR 58 (AA 2618) has been viewed during exposure to cyclic loading, which is applied using a load frame inserted into a scanning electron microscope. Thus observation of surface interactions of the material microstructure with a propagating crack is feasible. Photomicrographs and (for the purposes of analysis and presentation) dynamic, real-time video-recordings used to document the processes will be displayed and the nature of the observations presented in relation to existing physical understanding of fatigue. Some additional ideas will be included based on the results presente

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Wang, Ji-Rui, Jon H. Martin, Zhi-Hong Xu, and Yu-Zhou Du. "Aleurochiton orientalis Danzig, 1966 (Hemiptera: Aleyrodidae), newly recorded from China, with a key to puparia of all described Aleurochiton species." Entomologica Fennica 27, no. 4 (2016): 164–72. http://dx.doi.org/10.33338/ef.60260.

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The genus Aleurochiton Tullgren (1907) is here newly recorded from China as A. orientalis Danzig (1966). It was collected from Acer mono Maxim (Sapindales: Aceraceae) in Shaanxi Province, but was originally described from the Russian Far East (Southern Primor’ye) by Danzig (1966). The puparial morphology of A. orientalis is here illustrated by line art, photomicrographs and scanning electron microscope (SEM) photographs. An identification key to the all five described Aleurochiton species is provided.

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Overney, Gregor. "Using a Sony Cyber-Shot Digital Camera for Photomicrography." Microscopy Today 10, no. 6 (2002): 10–15. http://dx.doi.org/10.1017/s1551929500058442.

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Photomicrography is the combination of photography and compound microscopy. Photographers working with compound microscopes are facing many challenges (for an introduction see [1] and [2]). Digital photography offers great advantages, but also adds additional difficulties. Digital cameras have been used in photomicrography for over a decade now. Today, we have access to many excellent consumer-grade digital cameras that are most suitable for low-cost imaging systems for light microscopy. In this short paper, I summarize my experience with the Sony DSC-S70 digital camera, which comes with a nic

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Mia, Md Abu Sayid, Refat E. Ashraf, Mohammad Nurnabi, and Md Zahnagir Alam. "Eco-friendly Leather Dyeing using Ultrasound Technique." Journal of the American Leather Chemists Association 115, no. 6 (2020): 199–205. http://dx.doi.org/10.34314/jalca.v115i6.3819.

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In this study, leather was dyed using ultrasound and conventional methods to investigate the influence of ultrasound on leather dyeing. Ultrasound is more effective than mechanical agitation in enhancing leather dyeing. Effects of various process parameters, such as, dyeing temperature, dyeing time and doses of dye on dyeing of leather in presence of ultrasound were investigated. Dyed leathers were characterized with scanning electron microscopy (SEM), photomicrographic analysis, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), etc. It was observed that percentage exh

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Over, D. Jeffrey, Mark Grimson, and James E. Barrick. "Scanning electron microscope inverse imaging technique for positive image photomicrographs of microfossil molds." Journal of Paleontology 65, no. 6 (1991): 1013–14. http://dx.doi.org/10.1017/s0022336000033333.

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Macro- and microfossils are commonly preserved as external molds as a result of decay or dissolution of soft and mineralized body parts after compaction and cementation of the surrounding matrix. The molds, which often preserve external features of the organism in great detail, are difficult to compare to other specimens. To enhance study, positive casts are typically made. Numerous compounds can serve as a casting medium (Rigby and Clark, 1965; Rixon, 1976). In microfossil studies latex rubber (Klapper in Winder, 1966; Ellison, 1987; Tull et al., 1988) and silicone rubber (G. Miller, personal

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Taylor, R. E., P. E. Hare, Christine A. Prior, Donna L. Kirner, Lijun Wan, and Richard R. Burky. "Radiocarbon Dating of Biochemically Characterized Hair." Radiocarbon 37, no. 2 (1995): 319–30. http://dx.doi.org/10.1017/s0033822200030794.

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A series of 14C determinations have been obtained on hair samples principally from Holocene contexts that have been variously pretreated to examine different means of removing potential contamination. SEM photomicrographs have documented hair surfaces before and after different pretreatments. Amino-acid composition, C/N ratios and δ13C values have been obtained to biochemically characterize these samples and provide baseline data for future comparisons with less well-preserved samples. Our data support the view that appropriately pretreated hair samples can provide accurate 14C age determinati

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DUBEY, ANIL KUMAR, and SUDHIR SINGH. "A new whitefly genus and species, Himalayaleyrodes sarcococcae Dubey (Hemiptera: Aleyrodidae) infesting Christmas box (Buxaceae) in Western Himalaya, India." Zootaxa 4269, no. 4 (2017): 531. http://dx.doi.org/10.11646/zootaxa.4269.4.7.

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Puparia, immatures and adults of a new whitefly genus and species, Himalayaleyrodes sarcococcae Dubey are described from the Western Himalaya, India. The new species was found feeding on leaves as well as on green stems of Sarcococca saligna (D. Don) Muell. Biological information, habitus, line arts, photomicrographs of holotype and Scanning Electron Microscope (SEM) images are given for this new taxon. Also, we discuss similarities and dissimilarities of puparia of the new genus with its closely related genus Bemisia Quaintance & Baker. Feeding behaviour is discussed.

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Medeiros, Keila Machado, Diego Farias Lima, Carlos Antônio Pereira de Lima, Edcleide Maria Araújo, Hélio Lucena Lira, and Vanessa Nóbrega Medeiros. "Development of Polymer Membranes Modified with a Porogenic Agent." Materials Science Forum 869 (August 2016): 815–19. http://dx.doi.org/10.4028/www.scientific.net/msf.869.815.

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Membrane is a barrier that separates two phases and limits wholly or partially carrying one or several chemical species present in the phases. In this study, membranes with a polyamide6 porogenic agent were obtained. The membranes were prepared as thin films by phase inversion method using the immersion technique, precipitation by varying the percentage of porogenic agent introduced and the time of exposure of the membranes during the process of immersion-precipitation. The membranes obtained were characterized by scanning electron microscopy (SEM). From the SEM photomicrographs, a large morph

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Li, Bin, and Hong Wang. "Effect of Ball Milling on Powder Preparation by Mechanical Methods." Applied Mechanics and Materials 182-183 (June 2012): 1541–44. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.1541.

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In the milling process, the particles experience mechanical stresses at their contact points due to compression, impact, or shear with the mill medium or with other particles. The rate of grinding depends on a number of factors, including the mill parameters, the properties of the grinding media, and the properties of the particles to be ground. SEM photomicrographs show that the mean sizes of final refined powders are about 200–400 nm, and are quite uniformly distributed by wet ball milling, so the quasi-nano powders are very suitable for sintering.

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Mukhopadhyaa, Kinkar, D. K. Tripathy, and S. K. De. "Failure Properties of Silica-Filled Ethylene Vinyl Acetate Microcellular Rubber." Rubber Chemistry and Technology 66, no. 1 (1993): 38–47. http://dx.doi.org/10.5254/1.3538298.

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Abstract The concentrations of the blowing agent and silica filler alter the microstructure of ethylene vinyl acetate rubber foam which in turn is responsible for changes in the physical properties of the foam vulcanizates. The theoretically predicted flaw sizes were found to be in reasonable agreement with the largest pore diameter observed from SEM photomicrographs. The results support the theory that the tensile rupture of foam rubber occurs by the catastrophic tearing from a flaw present in the form of the largest pore in the microstructure of the foam.

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GRUBBS, SCOTT A., and RICHARD W. BAUMANN. "Alloperla clarki sp. nov. (Plecoptera: Chloroperlidae), a new species from the eastern Nearctic with discussion of a new species group." Zootaxa 4624, no. 2 (2019): 241–55. http://dx.doi.org/10.11646/zootaxa.4624.2.7.

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Alloperla Banks, 1906 (Plecoptera: Chloroperlidae) is a speciose genus of spring- and summer-emergent stoneflies known from the Oriental, eastern Palearctic, and Nearctic realms. Over 50 species are currently recognized. Alloperla clarki sp. nov. is described herein from the adult male stage from a small geographic area in the Appalachian Mountains in Virginia and West Virginia, USA. Diagnostic characters are presented with scanning electron microscope (SEM) photomicrographs. Alloperla clarki sp. nov. most closely resembles A. biserrata Nelson & Kondratieff, 1980, A. nanina Banks, 1911, an

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Kannappan, Saravanan, and Bhaarathi Dhurai. "Investigating and Optimizing the Process Variables Related to the Tensile Properties of Short Jute Fiber Reinforced with Polypropylene Composite Board." Journal of Engineered Fibers and Fabrics 7, no. 4 (2012): 155892501200700. http://dx.doi.org/10.1177/155892501200700412.

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The effect of temperature, pressure, and time on the tensile strength of jute fiber composite has been studied. The process of preparing the composite specimens is discussed. The best tensile properties were observed if the composite board is manufactured using high pressure and moderate temperature. For tensile strength, the time does not play a significant role. The study identifies the principal experimental pressure variables, which have the greatest effect on the tensile strength of the composite. The composite boards were subjected to tensile tests and the fractured surfaces were observe

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Horo, Dharmita, Sanjit Kumar Pal, Sahendra Singh, and Arkoprovo Biswas. "New Insights into the Gold Mineralization in the Babaikundi–Birgaon Axis, North Singhbhum Mobile Belt, Eastern Indian Shield Using Magnetic, Very Low-Frequency Electromagnetic (VLF-EM), and Self-Potential Data." Minerals 13, no. 10 (2023): 1289. http://dx.doi.org/10.3390/min13101289.

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The North Singhbhum Mobile Belt (NSMB) in the eastern Indian shield is an excellent example of a diverse lithological domain with multiphase shear/fracture zones. It is a well-acknowledged prospective region known for various mineralizations, e.g., Cu, Au, U, and Fe. The present study was conducted in the Babaikundi–Birgaon Axis (a shear and fracture zone within NSMB) within Babaikundi village. The study suggests that anomalous zones are possibly related to gold-associated sulfide mineralization using photomicrography and geophysical methods such as magnetic, self-potential (SP), and very low-

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Zhang, Yao Jun, Hai Hong Li, Ya Chao Wang, and De Long Xu. "Geopolymer Microstructure and Hydration Mechanism of Alkali-Activated Fly Ash-Based Geopolymer." Advanced Materials Research 374-377 (October 2011): 1481–84. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.1481.

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The microstructure and hydration mechanism of alkali-activated fly ash-based geopolymer were studied by means of scanning electron microscope (SEM) coupled with energy dispersive X-ray analysis (EDXA) and field emission scanning electron microscope (FESEM). The FESEM photomicrographs indicted that the fly ash-based geopolymer showed three dimensional frameworks with an average particle size of 50 nm. EDXA results demonstrated that the Na-PSS type geopolymer was produced via the disintegration of Si-O-Al and Si-O-Si chemical bonds and the polycondensation reaction between [SiO4]4-and [AlO4]5- t

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Das, Subrata. "Mechanical failure of mulberry and tasar silk." Tekstilna industrija 69, no. 2 (2021): 16–20. http://dx.doi.org/10.5937/tekstind2102016d.

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This article investigates the tensile and twist failure of mulberry and tasar silk filaments. The mulberry and tasar filaments were subjected to uniaxial loading on Instron tensile tester at different rate of extensions and gauge lengths. Furthermore, the number of turns to rupture the silk filaments was tested using a twist tester. The results showed that the mulberry filament has higher tensile and twist strength than that of tasar filament. The SEM photomicrographs of the region of fracture divulged that the tensile and twist failure of mulberry and tasar filaments take place in catastrophi

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Stark, Bill P. "Oriental Peltoperlinae (Plecoptera): A generic review and descriptions of a new genus and seven new species." Insect Systematics & Evolution 19, no. 4 (1988): 503–25. http://dx.doi.org/10.1163/187631289x00609.

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AbstractSeveral new and poorly known Oriental peltoperlid species are described, and keys are provided for Asian genera of Peltoperlinae and for the species of Cryptoperla Needham, 1909. Peltopteryx zwicki gen. et sp. n. is described from Assam; other new taxa include Cryptoperla akha sp. n. (Thailand), C. kali sp. n. (Assam), C. karen sp. n. (Thailand), C. kumari sp. n. (Assam), C. meo sp. n. (Thailand), and C. naga sp. n. (Assam). Peltoperlodes Kawai, 1968 is placed in synonymy with Cryptoperla, and a male Iectotype is designated for C. fraterna (Banks). Available eggs are illustrated with S

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Mônika, Chaves Medici, and Izabel Cristina Fröner. "A scanning electron microscopic evaluation of different root canal irrigation regimens." Brazilian Oral Research 20, no. 3 (2006): 235–40. http://dx.doi.org/10.1590/s1806-83242006000300010.

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The purpose of this study was to assess the effectiveness of endodontic irrigants in removing the smear layer from instrumented root canal walls using Scanning Electron Microscopy (SEM). The endodontic irrigants used were: 1% sodium hypochlorite (NaOCl); 1% NaOCl mixed to 17% EDTAC; 2% chlorhexidine gel; and Ricinus communis gel. Photomicrographs of the middle and apical thirds were evaluated with the aid of the Fotoscore - v. 2.0 software. The results indicated that the mixture of sodium hypochlorite and EDTAC completely removed the smear layer from dentinal walls. The other endodontic irriga

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Eskandari, Ali, Akbar Karegar, Ebrahim Pourjam, Esther van den Berg, and Louwrens Tiedt. "Additional data on some poorly known species of Criconemoides Taylor, 1936 (Nematoda: Criconematidae)." Nematology 12, no. 4 (2010): 505–18. http://dx.doi.org/10.1163/138855409x12506855979596.

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Abstract Six known species belonging to the genus Criconemoides, including some poorly known ones, are discussed, viz., C. parvus, C. informis, C. mongolensis, C. avicenniae, C. myungsugae and C. neoaxestis. The three latter species are reported for the first time since their original description and represent new records for Iran. Males of C. myungsugae were found for the first time and are described herein. Additional figures and measurements are provided for all of the aforementioned species, while SEM photographs, photomicrographs, illustrations and short notes are given for some of the sp

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Parikh, D. V., T. A. Calamari, A. P. S. Sawhney, et al. "Woven and Nonwoven Medical/Surgical Materials." International Nonwovens Journal os-8, no. 1 (1999): 1558925099OS—80. http://dx.doi.org/10.1177/1558925099os-800117.

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The physical characteristics and performance attributes of absorbent gauze and spunlaced nonwovens used for medical/surgical applications are reviewed. Because the manufacturing lines for spunlacing are versatile and highly productive, nonwoven products from this process are highly engineered and may have superior performance characteristics relative to gauze products. Dressings made from spunlaced materials are rapidly gaining in the wound care products market, which was once exclusive to woven gauze. A few microscopic images and SEM photomicrographs of a gauze made with two dissimilar techno

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RONDEROS, MARIA M., and GUSTAVO R. SPINELLI. "Description of the immatures of the predaceous midge Bezzia blantoni Spinelli & Wirth (Diptera: Ceratopogonidae)." Zootaxa 2295, no. 1 (2009): 46–54. http://dx.doi.org/10.11646/zootaxa.2295.1.5.

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The fourth instar larva and pupa of Bezzia blantoni Spinelli & Wirth (1989) are described, illustrated and photomicrographed by using phase-contrast microscopy and Scanning Electron Microscope (SEM). The larva, which shows features typical to carnivorous larvae, is compared with that of B. roldani Spinelli & Wirth. The species is recorded for the first time from the Martín García island, located in the La Plata river between Argentina and Uruguay. Details of the biology traits, breeding location and feeding behavior are given.

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Mia, Md Abu Sayid, Shamima Yeasmin, Mohammad Nurnabi, and Md Zahangir Alam. "Eco-friendly Chrome Tanning of Leather using Ultrasound Technique." Journal of the American Leather Chemists Association 119, no. 2 (2024): 80–90. http://dx.doi.org/10.34314/jalca.v119i2.8325.

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This article describes the development of an environmentally friendly chrome tanning process of leather using ultrasound. Most of the leathers are tanned by the conventional method using basic chromium sulfate. It is one of the most polluting and time-consuming steps in leather processing. Investigations were carried out on ultrasound assisted eco-friendly tanning process so that the chrome tanning agent could provide better quality leather. Effects of using ultrasound in chrome tanning process were studied at different pH, tanning time, tanning agent dosage, and then compared with that of con

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46

Koçak, Mustafa Murat, Sibel Koçak, Baran Can Saglam, and Sevinç Aktemur Türker. "Smear Layer and Debris Removal Following use of WaveOne and OneShape Single-File Systems: SEM Study." International Journal of Experimental Dental Science 3, no. 2 (2014): 77–83. http://dx.doi.org/10.5005/jp-journals-10029-1076.

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ABSTRACT Introduction The aim of study was to evaluate the cleaning efficacy of two single-file NiTi systems. Materials and methods Twenty-four mandibular premolars were selected. Two longitudinal grooves were prepared on the buccal and lingual surfaces. The roots were divided into groups (Group 1 — WaveOne, Group 2 — OneShape). The irrigation was performed using 2 ml of 5.25% NaOCl solution, 2 ml of 17% EDTA solution, and 2 ml saline. The roots were split longitudinally for SEM investigation. Serial SEM photomicrographs were taken under magnification at levels apical, middle and coronal third

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Mansur, Herman S., Alexandra A. P. Mansur, and Sheyla M. C. M. Bicallho. "Lignin-Hydroxyapatite/Tricalcium Phosphate Biocomposites: SEM/EDX and FTIR Characterization." Key Engineering Materials 284-286 (April 2005): 745–48. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.745.

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In the present work, a novel biocomposite has been developed based on lignin (Lig) and HA/b-TCP bioceramic materials. The Lig/HA and Lig/b-TCP systems were investigated by Scanning Electron Microscopy coupled to EDX microprobe (SEM/EDX). Lignin is a lignosulfonate natural polymer with complex random coupling and the exact chemical structure is yet unknown. FTIR spectroscopy is an important tool for lignin characterization based on several major vibration bands associated with generally found chemical groups. Consequently, FTIR spectroscopy was used to evaluate the chemical functionalities and

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Braga Júnior, Marcelo Mendes, Fernanda Ilkiu Borges de Souza, and Luiz Eduardo de Lima Melo. "Forestry control in the Brazilian Amazon II: charcoal anatomy of 21 species." IAWA Journal 42, no. 3 (2021): 299–321. http://dx.doi.org/10.1163/22941932-bja10058.

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Abstract The production of illegal charcoal, associated with other local human practices, is responsible for the degradation of native forests, especially in the Brazilian Amazon. The need for market control and charcoal production is accompanied by the lack of comparative charcoal materials from the Amazon. Here, we describe charcoal samples of 21 Brazilian species and provide SEM images that can facilitate the charcoal identification. It is possible to distinguish the species on the basis of anatomy. Features such as vessel groupings, vessel–ray pitting, perforation plates, axial parenchyma,

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Medeiros, Keila Machado, Taciana Regina de Gouveia Silva, Dayanne Diniz Souza Morais, Luana Rodrigues Kojuch, Edcleide Maria Araújo, and Hélio Lucena Lira. "Study of Morphology Membrane of Polymeric Nanocomposites Obtained by Phases Inversion." Materials Science Forum 775-776 (January 2014): 498–503. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.498.

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In this work, were obtained nanocomposite membranes polyamide66/Paraíba bentonite clay, treated with a quaternary ammonium salt in order to make it organophilic. The membranes were prepared as thin films using the technique of phase inversion from the nanocomposites obtained by solution. The membranes were characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetry (TG) and scanning electron microscopy (SEM). By means of X-ray diffractogram, it was revealed that the membranes remained organically treated clay presented exfoliated and/or partially exfoli

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Neha, Mahajan, and Laxman K. Vandana. "Effects of Citric Acid and Desensitizing Agent Application on Nonfluorosed and Fluorosed Dentin: An In Vitro Sem Study." Open Dentistry Journal 9, no. 1 (2015): 98–102. http://dx.doi.org/10.2174/1874210601509010098.

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Fluorosis is one of the factors which bring about mineralisation changes in a dentinal structure leading to dentin. The purpose of the present study was to compare and evaluate the dentinal tubular changes in fluorosed and nonfluorosed teeth subsequent to the application of citric acid,strontium acetate based sodium fluoride (SAF) using scanning electron microscopy (SEM). Dentin specimens from healthy fluorosed and nonfluorosed teeth were included in the study. Each of them was grouped into acid treated and SAF treatment groups. Using SEM, the photomicrographs (3500x) of dentin specimens were

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