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将WGA-HRP注入75~90日龄鸡肾上腺内,追踪支配鸡肾上腺传出神经元的胞体,结果显示:鸡肾上腺接受交感神经节前和节后神经元的支配,以节后神经元支配占主导;迷走神经的传出神经元也支配鸡肾上腺,并处于次要地位。 相似文献
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本文以绵羊时辰生理学和时辰生物化学指标昼夜节律为研究对象,应用计算机根据最小二乘法原理设计软件拟合指标的群体余弦曲线,找出曲线的振幅、峰相位及其95%的置信区问。如果对数学模式稍加改动,则可适合各种类型生物节律的编程计算。 相似文献
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龙钰 《四川畜牧兽医学院学报》2007,5(3):42-47
我国能源立法体系存在基本法缺失,单行法不完善,配套法规缺位等缺陷。重构能源立法体系应以可持续发展为立法宗旨,引入环境影响评价制度,建立绿色标识制度,强化企业的社会生态责任,从而增强与环境法、自然资源法等相关法律的衔接;建立能源领域的宏观调控制度,鼓励开发清洁的新型能源,提高能源利用效率;促进市场化改革,力求实现经济性、供应保障性和环境保护性这一“稳固三角”目标。 相似文献
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ACCURACY OF RADIOGRAPHIC DETECTION OF THE CRANIAL MARGIN OF THE DORSAL LAMINA OF THE CANINE SACRUM
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Lauren M. Blume Andrew J. Worth Eli B. Cohen Janis P. Bridges Angela C. Hartman 《Veterinary radiology & ultrasound》2015,56(6):579-588
An elongated sacral lamina has been described as one of the contributing factors for dogs with cauda equina syndrome due to degenerative lumbosacral stenosis (DLSS); however, published evidence is lacking on the accuracy of radiographic screening for the presence of this lesion. Objectives of this prospective, cross‐sectional cadaver study were to describe the accuracy and repeatability of detection of the cranial sacral lamina margin on plain lateral radiographs of the lumbosacral junction in dogs. Twenty‐five medium and large breed canine cadavers were radiographed before and after placement of a radiopaque hook in the cranial margin of the sacral lamina. Three independent evaluators placed digital markers at the perceived margin on preinterventional radiographs. The distance from perceived location to the true location on postinterventional radiographs was recorded for each dog and observer. A discordance threshold (distance between perceived and actual margin) of 1.5 mm was subjectively defined as clinically relevant. The three evaluators demonstrated good repeatability, although the accuracy for margin detection was only fair (mean discordance 1.7 mm). Evaluators demonstrated greater accuracy in identifying the landmark in juveniles (1.4 mm) vs. adults (1.8 mm; P < 0.01). Results of this study indicated that observer repeatability is good and accuracy is fair for correctly identifying the radiographic cranial margin of the sacral lamina in dogs. This should be taken into consideration when interpreting elongation of the sacral lamina in radiographs of dogs with suspected DLSS, especially adults. 相似文献