共查询到20条相似文献，搜索用时 0 毫秒
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Schaeffer AA 《Science (New York, N.Y.)》1910,31(807):955-957
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Paton S 《Science (New York, N.Y.)》1909,30(780):833-835
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Osborn HF 《Science (New York, N.Y.)》1903,17(424):265-267
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CLEVENGER MR 《Science (New York, N.Y.)》1963,142(3589):241-242
A practical microtome may be built with nominal skill, hand tools, and a drill press. Thermal specimen advance and cutting action by rod flexion eliminate pivots and critical moving parts. The cost of materials is negligible. Resultant sections are adequate for routine work in electron microscopy. sectioning for electron microscopy. 相似文献
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The abdominal aorta of small mammals is easy of access, and this vessel is well suited for the taking of blood pressure tracings having a good amplitude of pulsation. The construction of a very simply made and satisfactory membrane manometer is described with which tracings of very large pulse amplitude are easily obtained. 相似文献
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