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Microscopy Research and Technique

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https://www.readbyqxmd.com/read/29350451/morphological-specializations-of-the-epidermis-of-an-angler-catfish-chaca-chaca-siluriformes-chacidae-in-relation-to-its-ecological-niche-a-scanning-electron-microscopic-investigation
#1
Arup Mistri, Usha Kumari, Swati Mittal, Ajay Kumar Mittal
The present work was undertaken with the aim to deduce morphological adaptations in skin of an angler catfish Chaca chaca by means of scanning electron microscopy. The fish is nocturnal, bottom dwelling, sluggish, ambush predator, lives in sand, mud, or soft substrates often buried and camouflaged for protection and to feed. The surface of the epidermis is covered with polygonal epithelial cells, each having surface relief of microridges forming intricate patterns. In between epithelial cells irregularly distributed mucous cell openings, randomly distributed epidermal specialized structures, taste buds, and neuromasts are discernible...
January 19, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29345388/dentin-bond-strength-and-nanoleakage-of-the-adhesive-interface-after-intracoronal-bleaching
#2
Vanessa Cavalli, Maicon Sebold, Mirela Sanae Shinohara, Patrícia Nóbrega Rodrigues Pereira, Marcelo Giannini
This study evaluated dentin bond strength (BS) and nanoleakage of non- and pre-etched dentin immediately (T0 ,), 7 days (T7 ), and 14 days (T14 ) after bleaching. Bovine incisors (150) were selected and half of them submitted to intrapulpal dentin etching (e). Non- and pre-etched dentin were subjected to the following (n = 15): no bleaching/control (C); 35% carbamide peroxide (CP); 35% hydrogen peroxide (35% HP); 25% hydrogen peroxide (25% HP); and sodium perborate (SP). Bleaching agents were applied to the pulp chamber four times within a 72-h interval...
January 18, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29341381/effect-of-ethanol-on-the-antimicrobial-properties-of-chlorhexidine-over-oral-biofilm
#3
Pedro Henrique Marks Duarte, Paula Barcellos da Silva, Ricardo Abreu da Rosa, Francisco Montagner, Marco Antônio Húngaro Duarte, Milton Carlos Kuga, Marcus Vinícius Reis Só
The aim of this study was to evaluate the effect of 95% ethanol irrigation, with 5 or 10 min of action, on the antibacterial properties of 2% chlorhexidine (CHX), on oral biofilm, evaluated with confocal laser scanning microscopy (CLSM). Oral biofilm development was induced in 80 sterilized bovine dentin blocks, distributed in two groups (5 or 10 min) and 4 subgroups, according to time and the solution used: Saline (SALINE5, SALINE10); Saline followed by CHX (SALINE/CHX5, SALINE/CHX10); Ethanol (ETHANOL5, ETHANOL10), Ethanol followed by CHX (ETHANOL/CHX5, ETHANOL/CHX10)...
January 17, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29341338/human-teeth-biobank-microbiological-analysis-of-the-teeth-storage-solution
#4
Fabiana Almeida Curylofo-Zotti, Francine Lorencetti-Silva, Jéssica de Almeida Coelho, Rachel Maciel Monteiro, Evandro Watanabe, Silmara Aparecida Milori Corona
The cross-infections may occur during handling of dental elements, affecting the health of dental practitioners and researchers. This study aimed to analyze the influence of the storage medium temperature on the bacterial contingent of the human teeth used for research purposes. Thirty human teeth were donated to the Human Teeth Biobank immediately after extraction. The teeth were cleaned with tap water and neutral soap. The teeth were randomly distributed according to the temperature of the storage solution (deionized water): at 4 °C (refrigerator) or at -10 °C (freezer) and were stored individually in sterile vials during 60 days...
January 17, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29322588/two-frequency-cars-imaging-by-switching-fiber-laser-excitation
#5
LETTER
Eric C Rentchler, Ruxin Xie, Rongqing Hui, Carey K Johnson
To fully exploit the power of coherent Raman imaging, techniques are needed to image more than one vibrational frequency simultaneously. We describe a method for switching between two vibrational frequencies based on a single fiber-laser source. Stokes pulses were generated by soliton self-frequency shifting in a photonic crystal fiber. Pump and Stokes pulses were stretched to enhance vibrational resolution by spectral focusing. Stokes pulses were switched between two wavelengths on the millisecond time scale by a liquid-crystal retarder...
January 11, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29322587/growth-rings-in-roots-of-medicinal-perennial-dicotyledonous-herbs-from-temperate-and-subtropical-zones-in-china
#6
Shanshan Chu, Lingling Tan, Chanchan Liu, Huasheng Peng, Haiyan Duan, Luqi Huang
Growth years are closely related to the quality of Chinese medicinal materials, and they can provide a reliable basis for quality evaluation on crude drugs in accordance with the suitable growth years. Herbchronology, the numerical and pattern analysis of annual growth rings in herbaceous perennials, has emerged to be a recognized science that is applied in age determination of perennial forbs. Fifty medicinal species growing in temperate and subtropical zones of China were examined by microstructure observation to determine the presence of growth rings in the secondary root xylem of medicinal perennial dicotyledonous herbs...
January 11, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29322584/effects-of-fixation-on-electrophysiology-and-structure-of-human-jejunal-villi
#7
Anna Casselbrant, Herbert F Helander
The villi of human jejunum vary in size and shape during different functional conditions. In the base the lamina propria is isotonic with blood, in the tip hyperosmotic. Here we study electrophysiological and morphological effects of incubation in hypotonic, isotonic, or hypertonic solutions, and to test various isotonic fixatives for microscopy. Samples of jejunal mucosae, obtained during surgery in obese patients, were studied in Ussing chambers where electrical parameters were registered during incubation in Krebs solution at various osmolarities, and during fixation in formaldehyde, glutaraldehyde, or osmium tetroxide (OsO4 )...
January 11, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29322581/technical-implementations-of-light-sheet-microscopy
#8
REVIEW
Zagato Elisa, Brans Toon, Stefaan C De Smedt, Remaut Katrien, Neyts Kristiaan, Braeckmans Kevin
Fluorescence-based microscopy is among the most successful methods in biological studies. It played a critical role in the visualization of subcellular structures and in the analysis of complex cellular processes, and it is nowadays commonly employed in genetic and drug screenings. Among the fluorescence-based microscopy techniques, light sheet fluorescence microscopy (LSFM) has shown a quite interesting set of benefits. The technique combines the speed of epi-fluorescence acquisition with the optical sectioning capability typical of confocal microscopes...
January 11, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29319204/observation-of-curative-effect-of-intravitreal-injection-of-conbercept-in-wet-age-related-macular-degeneration-optical-coherence-tomography-analysis-after-injection
#9
Wen Yang, Ying Tan, Chaowei Li, Yi Liu, Guohua Lu
To observe the clinical efficacy of intravitreal injection of conbercept in the treatment of wet age-related macular degeneration (wAMD), optical coherence tomography (OCT) and the best corrected visual acuity (BCVA) was observed to measure the changes of anatomical changes of central macular thickness (CMT) and the area and volume of retinal pigment epithelium (RPE) uplift. Fifteen patients (15 eyes) with wet AMD were enrolled in this study. All patients underwent intravitreal injection of conbercept of 0...
January 10, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29318746/pigmented-macrophages-and-related-aggregates-in-the-spleen-of-european-sea-bass-dosed-with-heavy-metals-ultrastructure-and-explorative-morphometric-analysis
#10
Maurizio Manera, Bahram Sayyaf Dezfuli, Joseph A DePasquale, Luisa Giari
The ultrastructure and morphometrics of pigmented macrophages (PMs) were assessed in the spleen of European sea bass experimentally dosed with Cd and Hg. PMs occurred either as solitary cells or as variably structured aggregations, defined as macrophage aggregates (MAs). Light microscopy revealed a high degree of morphological heterogeneity amongst MAs of all experimental groups. At the ultrastructural level, MAs showed a heterogeneous pigment content that was not influenced by the treatment. Cytoplasm rarefaction/vacuolation and euchromatic nuclei, were observed in PMs of dosed fish...
January 10, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29318745/tissue-distribution-of-some-immune-cells-in-bovine-reproductive-tract-during-follicular-and-luteal-phase
#11
Mehmet Erdem Akbalik, Narin Liman, Hakan Sagsoz, Berna Guney Saruhan
More recent studies indicate that immune cells which secrete their secretory products or cytokines play an important role in reproductive system. In our study, immune cell populations (CD8+ T lymphocytes, CD68+ macrophages, plasma cells, siderophages, eosinophils) and expression of major histocompatibility complex (MHC) class I and class II were examined in female reproductive tract during follicular (n = 13) and luteal phase (n = 10). Plasma cells and eosinophil granulocytes are present in few numbers in luminal epithelium, but abundant in longitudinal muscle layer of uterus, whereas siderophages are the dominant cell type in stroma...
January 10, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29318713/hybrid-feature-extraction-techniques-for-microscopic-hepatic-fibrosis-classification
#12
Dalia S Ashour, Dina M Abou Rayia, Mohamed Maher Ata, Amira S Ashour, Mustafa M Abd Elnaby
Chronic liver diseases' hallmark is the fibrosis that results in liver function failure in advanced stages. One of the serious parasitic diseases affecting the liver tissues is schistosomiasis. Immunologic reactions to Schistosoma eggs leads to accumulation of collagen in the hepatic parenchyma causing fibrosis. Thus, monitoring and reporting the staging of the histopathological information related to liver fibrosis are essential for accurate diagnosis and therapy of the chronic liver diseases. Automated assessment of the microscopic liver tissue images is an essential process...
January 10, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29315973/field-of-view-scanning-based-quantitative-interferometric-microscopic-cytometers-for-cellular-imaging-and-analysis
#13
Keding Yan, Liang Xue, Shouyu Wang
Microimaging is of great significance in the biological and medical fields, since it can realize observations acting as important references for cellular research and disease diagnosis. However, traditional microscopy only offers qualitative sample contours; moreover, it is difficult to reach large-amount sample observations limited by the fixed field of view (FoV). To realize massive cellular measurements quantitatively, three designed quantitative interferometric microscopic cytometers based on the FoV scanning are introduced and compared in details in this article...
January 9, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29316029/physiological-significance-of-gravity-receptors-on-larval-cephalic-cuticle-in-the-silk-moth-antheraea-proylei-jolly
#14
Sudip Dey, S Choudhury
The lateral aspects of larval cephalic cuticle of oak tasar moth, Antheraea proylei, a hybrid between Antheraea pernyi and Antheraea roylei exhibited the presence of gravity receptors in the form of dorsal campaniform sensilla. The distribution pattern and number of dome shaped dorsal campaniform sensilla were found to vary in different larval stages. In the first and second larval stages, 4-5 sensilla were localized near the apex of the lateral aspects of the cephalic cuticle on either side of the head. From the third larval stage onwards, on the other hand, both the right and left lateral aspects of the cephalic cuticle were covered with innumerable dome shaped dorsal campaniform sensilla...
January 8, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29285826/a-cone-beam-computed-tomography-study-of-the-anatomical-relationships-between-mandibular-teeth-and-the-mandibular-canal-with-a-review-of-the-current-literature
#15
Umut Aksoy, Seçil Aksoy, Kaan Orhan
The purpose of this study was to evaluate age- and sex-related changes in the anatomical relationships between the roots of the molars and premolars and the mandibular canal using cone-beam computed tomography (CBCT) images. A total of 243 patients (116 males, 127 females) aged 16-83 years for whom previous CBCT scans were available were enrolled in this study. The patients were subcategorized by sex and age (Group I, <21 years; Group II, 21-40 years; and Group III, >40 years). The distances between the mandibular canal and the molars and premolars were measured...
December 29, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29280232/intraspecific-variation-in-seed-morphology-of-tribe-vicieae-papilionoidae-using-scanning-electron-microscopy-techniques
#16
Neelam Rashid, Muhammad Zafar, Mushtaq Ahmad, Khafsa Malik, Ihsan-Ul Haq, Syed Nasar Shah, Abdul Mateen, Tauseef Ahmed
Seed micromorphology of 12 species of tribe Vicieae (Papilionoidae) representing five genera were examined using Scanning Electron Microscope (SEM). The different seed types were described, illustrated, compared, and their taxonomic importance is discussed. Seeds exhibit great diversity in ultrastructure and a variety of novel morphological features have been determined among and within genera of the tribe. Seeds were characterized by oval to round shape, ovate to oblong outline and striate to papillate ornamentation...
December 27, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29274108/usefulness-of-hard-x-ray-microscope-using-synchrotron-radiation-for-the-structure-analysis-of-insects
#17
Jiwon Lee, Onseok Lee
Three-dimensional (3D) printing technology has the advantage of enabling specific visualization of creative ideas. Since synchrotron based images can provide high sensitivity and high resolution, they are a very useful technology to identify the 3D anatomy of microscale samples. X-ray images using such synchrotron radiation are grafted to 3D printing technology. We can be obtained 3D images and modeling data of an ant using synchrotron radiation, and then, it were outputted with the 3D printer. A new way to identify the usefulness of the structure analysis is then found by visualizing the micro-internal structure of diverse biomedical samples and creating an enlarged model...
December 23, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29239112/male-reproductive-tract-and-spermatozoa-ultrastructure-in-the-grasshopper-orphulella-punctata-de-geer-1773-insecta-orthoptera-caelifera
#18
Daniela Santos Martins Silva, Jamile Fernanda Silva Cossolin, Marcelo Ribeiro Pereira, José Lino-Neto, Carlos Frankl Sperber, José Eduardo Serrão
Identification Orphulellini grasshoppers (Acrididae: Gomphocerinae) species has been difficult due to high polymorphism rate. Orphulella Giglio-Tos, 1894 is a genus with widespread geographical distribution and poor descriptions. Orphulella punctata (De Geer, 1773) has an extensive record of occurrence and available information about the phallic complex, however, there is poor data describing other parts of the male reproductive tract. The objective of this study was characterizes the internal organs of the male reproductive system and spermatozoa of O...
December 14, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29205666/evaluation-of-17-edta-and-10-citric-acid-in-smear-layer-removal-and-tubular-dentin-sealer-penetration
#19
Ricardo Machado, Lucas da Fonseca Roberti Garcia, Ulisses Xavier da Silva Neto, Antônio de Miranda da Cruz Filho, Ricardo Gariba Silva, Luiz Pascoal Vansan
The purpose of this study was to compare the efficacy of different chelating solutions (17% EDTA and 10% citric acid) on the smear layer removal, and their effect on tubular dentin sealer penetration. Sixty root canals were prepared and distributed into four groups (n = 15) according to the final irrigation protocol: G1, final irrigation with 2.5 mL of distilled water; G2, final irrigation with 2.5 mL of 2.5% sodium hypochlorite solution; G3, final irrigation with 2.5 mL of 17% EDTA; and G4, final irrigation with 2...
December 5, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29193422/the-effect-of-short-heat-treatment-on-different-properties-of-pet-fiber-using-double-beam-interference-microscopy
#20
T Z N Sokkar, K A El-Farhaty, M A El-Bakary, A M Ali, A A Ahmed
Pluta microscope used to throw light on the effect of heat treatment time on the different properties of poly (ethylene terephthalate) PET fibers. PET fibers were annealed at times ranged from 5 to 30 min at different temperatures (150, 170, 190, 210°C) using two different processes (fast cooling and slow cooling processes) in air. The refractive indices, the shrinkage, orientation factor and crystallinity of PET fibers were determined for different annealing temperature during the short time treatment. The shrinkage percentage and degree of crystallinity increased with increasing the temperature and time of annealing...
November 30, 2017: Microscopy Research and Technique
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