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101.
本文用免疫细胞化学法研究正常和再生的大白鼠外周神经中脱辅基脂蛋白E(ApoE)和低密度脂蛋白(LDL)受体的运输特性,发现在正常的外周神经中,ApoE及LDL受体在轴浆中均可沿轴突正行和逆行运输;再生的神经可产生ApoE,ApoE可逆行向细胞体转运。ApoE及LDL受体运输特性的研究为ApoE及LDL受体参与神经损伤后的修复和再生提供了进一步的证据。 相似文献
102.
In this report, we present a rapid method for producing high-quality micrographs suitable for determining the size distributions of particles in concentrated samples of postprandial chylomicrons and chylomicron remnants. The procedure consists of mixing particles with osmium tetroxide in water to stabilize the lipids of the particles. These fixed and positively stained particles are then negatively stained with phosphotungstate in the presence of dilute sucrose. This dual staining procedure prevents the fusion and clustering of chylomicrons during processing for electron microscopy and is effective with particles of different lipid compositions. In addition, this procedure is simple and rapid, adding only one mixing step and 5 min to the preparation time required for conventional negative stains. 相似文献
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James Boyles Rogers 《Biotechnic & histochemistry》1935,10(4):135-138
An arrangement of apparatus for applying micro-manipulative procedures to cells in living mammals is described. It was found satisfactory for manipulation of pericapillary cells and capillary endothelium in the greater omentum of the cat.
An animal board, a Bausch and Lomb triple purpose micro-projector and a double Fitz micro-manipulator were mounted on a spring platform. The micro-needles were drawn from Pyrex rods by hand. The stage of the microscope was modified to protect the condenser from fluids. Warm saline solution was carried to the exposed omentum thru flexible rubber tubing.
The use of a micro-dissection chamber which immobilized the part of the omentum under manipulation is explained. The construction of this chamber is shown by diagrams. A camera support was bolted to the base of the micro-manipulator.
The arrangement of apparatus is shown by a photograph. 相似文献
An animal board, a Bausch and Lomb triple purpose micro-projector and a double Fitz micro-manipulator were mounted on a spring platform. The micro-needles were drawn from Pyrex rods by hand. The stage of the microscope was modified to protect the condenser from fluids. Warm saline solution was carried to the exposed omentum thru flexible rubber tubing.
The use of a micro-dissection chamber which immobilized the part of the omentum under manipulation is explained. The construction of this chamber is shown by diagrams. A camera support was bolted to the base of the micro-manipulator.
The arrangement of apparatus is shown by a photograph. 相似文献
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Using BEES to select cost-effective green products 总被引:1,自引:0,他引:1
Barbara C. Lippiatt Amy S. Boyles 《The International Journal of Life Cycle Assessment》2001,6(2):76-80
The BEES (Building for Environmental and Economic Sustainability) software brings to your fingertips a powerful technique
for balancing the environmental and economic performance of building products. The tool is based on consensus standards and
designed to be practical, flexible, and transparent. Version 2.0 of the Windows™-based decision support software, aimed at
designers, builders, and product manufacturers, includes actual environmental and economic performance data for 65 building
products. The purpose is to support purchasing decisions by providing key science-based information often lacking in ‘green’
product selection. The intended result is a cost-effective reduction in building-related contributions to environmental problems.
Contribution of the National Institute of Standards and Technology (NIST) and not subject to copyright in the United States.
NIST does not endorse any particular brand, product, or service. 相似文献
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This study focuses on the cytotoxic effects of fumonisin B1 (FB1) on both immortalised and immortalised and subsequently transfected normal human bronchial epithelial (NHBE) cells of human
origin using four bioassays. While the MTT, Neutral Red and hexosaminidase colorimetric assays showed little difference between
the toxic effects on the two related cell lines, the clonogenic assay, measuring cell survival and proliferation, indicated
that FB1 had a more toxic effect on the nontransfected cells. This kind ofin vitro approach using cells which retain many characteristics of normal cell growth and differentiation can go some way to developing
evaluation models for food safety in the case of mycotoxin contamination without resorting totally to whole animal testing.
Nevertheless, one or two cytotoxicity tests may be inadequate for a complete appraisal of toxic potential: rather, as wide
a range of methodologies as feasible should be employed initially before meaningful conclusions may be drawn. 相似文献
110.
M Kale R Ramsey-Goldman S Bernatsky MB Urowitz D Gladman PR Fortin M Petri E Yelin S Manzi S Edworthy O Nived S-C Bae D Isenberg A Rahman JG Hanly C Gordon S Jacobsen E Ginzler DJ Wallace GS Alarcón MA Dooley L Gottesman K Steinsson A Zoma J-L Senécal S Barr G Sturfelt L Dreyer L Criswell J Sibley JL Lee AE Clarke 《Arthritis research & therapy》2012,14(Z3):A15