共查询到20条相似文献，搜索用时 46 毫秒
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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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EFFECT OF DISRUPTION OF THE SEBACEOUS LAYER OF THE SHEEP''S SKIN ON THE INCIDENCE OF FLEECE-ROT 总被引：1，自引：0，他引：1
It was postulated that integrity of the sebaceous layer on the skin is important in maintaining resistance to fleece-rot. This hypothesis was tested in an experimenta of a 2 x 2 factorial design in which sebaceous layer disruption and wetting were the 2 treatments. The sebaceous layer was disrupted by applying a light petroleum solvent to the skin of the sheep. Fleece-rot occurred in all sheep (20) that were both wetted and had the sebaceous layer disrupted while 9/19 of those wetted but without the sebaceous layer disrupted developed fleece-rot. The fleece-rot lesions observed were more severe in sheep in the disrupted wetted treatments than in the intact wetted treatment. Interpretation of these differences was complicated by a possible reaction of the skin to the solvent used. The differences were not due to an effect of treatment on fleece wettability. No fleece-rot developed in the sheep not wetted and application of the solvent alone did not induce fleece-rot. 相似文献
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This study uses computed tomography and computer aided design software (I-DEAS(tm)) for the development of a three-dimensional electronic solids model of the lower limb of the horse. Data from two millimeter transverse contiguous slices of the distal forelimb of a yearling horse were acquired from a computed tomographic scanner and then transferred to a computer system via magnetic tape. Outline of the bony tissue for each scan slice was first obtained with a feature extraction algorithm. A solids model for each skeletal segment of the specimen was then reconstructed with I-DEAS(tm) and subsequently displayed with various graphics options. The reconstructed electronic solids model would be useful for the study of 3D joint mechanics and finite element analysis of the bony structures, as well as for diagnostic purposes providing CT images could be obtained antemortem. 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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下载免费PDF全文 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
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王尚荣 《中国兽医寄生虫病》2007,15(2):19-21
目的为查明治疗杂交奶牛痒螨病的最佳药物。方法采用6种不同药物对杂交奶牛痒螨病予以治疗,分别在用药后的d 20、40、60、80观察其疗效。结果不同的药物对杂交奶牛的痒螨病均有一定的疗效,但随着时间的推移,痒螨病的复发率较高,80 d后观察,试Ⅰ组(克虫星组)疗效最好,痊愈率达60%,试Ⅵ组(农用柴油组)疗效最低,痊愈率只有20%。 相似文献