Microscopy Research and Technique

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Chronic intrathecal infusions after spinal cord injury cause scarring and compression
Microscopy Research and Technique - Tập 54 Số 5 - Trang 317-324 - 2001
Leonard L. Jones, Mark H. Tuszynski
AbstractIntrathecal infusions are used in a number of rodent studies to deliver substances to the injured spinal cord. Whereas this method has been successful in certain paradigms, two potential limitations of this model have not been extensively reported: (1) scar formation at the catheter tip, which can lead to infusion failure, and (2) damage to the spinal cord ...... hiện toàn bộ
Microvascular growth, development, and remodeling in the embryonic avian kidney: The interplay between sprouting and intussusceptive angiogenic mechanisms
Microscopy Research and Technique - Tập 66 Số 6 - Trang 275-288 - 2005
Andrew N. Makanya, Daniela Stauffer, Doménico Ribatti, Peter H. Burri, Valentin Djonov
Improved TEM samples of semiconductors prepared by a small‐angle cleavage technique
Microscopy Research and Technique - Tập 24 Số 2 - Trang 180-184 - 1993
J. P. McCaffrey
AbstractA small‐angle cleavage technique has been developed that produces superior transmission electron microscope (TEM) samples of semiconductors and related materials. The technique involves back‐thinning the sample to approximately 100 μm, then scribing a groove on this back face at a specified small angle to a standard cleavage plane. The sample is cleaved alo...... hiện toàn bộ
Push‐out bond strength of various surface treatments on fiber post to root canal dentine using different irrigation techniques
Microscopy Research and Technique - Tập 84 Số 9 - Trang 2024-2033 - 2021
Ömer Kırmalı, Turan Sekmen, Ayşegül Karaarslan
AbstractTo compare the efficacy of different surface treatments (fiber post) with laser activated irrigation (LAI) technique (various root canal solutions) on root canal dentine in terms of push‐out bond strength (PBS) in a fiber post. In this study, 200 premolars were assigned into groups according to various irrigation techniques: 2.5% sodium hypochlorite (NaOCl)...... hiện toàn bộ
Effect of dentin and fiber post surface treatments with fumaric acid on the bonding ability of fiber posts
Microscopy Research and Technique - Tập 83 Số 10 - Trang 1290-1296 - 2020
Esma Sarıçam, Merve Arslan
AbstractThis study investigated the effects of fumaric acid on push‐out bond strength when applied to dentin surfaces and fiber posts. The root canals of 60 mandibular premolar teeth were instrumented and obturated. After removing two thirds of filling material, teeth were prepared according to six randomized groups (n = 10/group) defined...... hiện toàn bộ
Artifacts caused by dehydration and epoxy embedding in transmission electron microscopy
Microscopy Research and Technique - Tập 26 Số 6 - Trang 496-512 - 1993
Hilton H. Mollenhauer
AbstractEpoxy resins are the principal embedding media for the preservation of tissues to be sectioned and examined by transmission electron microscopy. Their primary advantages are good ultrastructural preservation, little or no shrinkage, ease of sectioning, and reasonable stability in the electron beam. However, epoxy resins also have disadvantages; namely, some...... hiện toàn bộ
Substrate influence on cell shape and cell mechanics: HepG2 cells spread on positively charged surfaces
Microscopy Research and Technique - Tập 72 Số 12 - Trang 957-964 - 2009
Verónica Saravia, José L. Toca‐Herrera
AbstractA human hepatoma cell line (HepG2) was cultured on positively and negatively charged polyelectrolytes. Cell/surface adhesion and cell shape evolution were followed with quartz microbalance with dissipation (QCM‐D) and optical microscopy as a function of time, respectively. In particular, substrates coated with poly(ethyleneimine) (PEI) led to fast cell atta...... hiện toàn bộ
Polyspermy prevention in marine invertebrates
Microscopy Research and Technique - Tập 61 Số 4 - Trang 379-388 - 2003
Meredith C. Gould, José Luis Stephano
AbstractIn marine invertebrates, as in most other organisms, normal development requires that only one sperm nucleus joins with the egg nucleus at fertilization. The principal mechanisms employed are (1) prevention of sperm‐egg plasma membrane fusion and (2) modifications of the egg extracellular coat to prevent sperm binding and/or penetration. In a third strategy...... hiện toàn bộ
Fine structure of the pinealopetal innervation of the mammalian pineal gland
Microscopy Research and Technique - Tập 21 Số 3 - Trang 188-204 - 1992
Morten Møller
AbstractThe mammalian pineal gland is innervated by peripheral sympathetic and parasympathetic nerve fibers as well as by nerve fibers originating in the central nervous system (central innervation). The perikarya of the sympathetic fibers are located in the superior cervical ganglia, while the fibers terminate in boutons containing small granular vesicles and a fe...... hiện toàn bộ
Localization of metals in cells of saprophagous soil arthropods (Isopoda, Diplopoda, Collembola)
Microscopy Research and Technique - Tập 56 Số 5 - Trang 393-401 - 2002
Heinz‐R. Köhler
AbstractThis review summarizes results on the intracellular distribution of metals in cells of woodlice (Isopoda), millipedes (Diplopoda), and springtails (Collembola), which are three major groups of saprophagous arthropods contributing to the turnover of soil organic matter. Although the impact of metals and also metal pollution has inevitably been shown at level...... hiện toàn bộ
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