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何富汉 《青海畜牧兽医杂志》1991,(1):25-27
医用胶在1960年首创于美国。30多年来,美国、日本、欧洲、苏联等在这方面作了大量的研究工作。我国于60年代中期也开始研究医用胶,到1978年西安化工研究所合成α-氰基丙烯酸正辛酯单体,在此基础上研究出医用胶系列产品,并经国家主管部门注册,卫生部门批文,已经投入市场。截止1987年底国内已有629家医院、农业院校在临床上广泛应用了医用胶。临床工作者一致认为,医用胶具有操作简便、无刺激、止 相似文献
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医用胶(α-氰基丙烯酸烷基酯)已在人医外科中广泛应用,它主要由α-氰基丙烯酸和烷氧基酯混合物为主要成份,配合少量稳定剂、阻聚剂制成,适用于手术切口和创口的粘合,内脏创面的止血、修补、加固,窦道、瘘管的粘堵,骨折片的粘合,血管栓塞等.α-氰基丙烯酸烷基酯在国内动物外科中未见报到,笔者在临床上治疗1条犬的舌断裂,经多次缝合无效后,经医用胶对犬舌断裂粘合治疗效果显著,现将治疗情况介绍如下. 相似文献
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一次性使用速效止血包对小型猪止血疗效试验观察 总被引:1,自引:0,他引:1
本试验旨在研究一次性使用速效止血包对动物中动脉血管损伤的止血疗效,并与速效止血粉比较止血效果。选择小型猪9只,按体重随机分为一次性使用速效止血包试验组、速效止血粉对照组、空白对照组,制作前肢肱动脉穿刺出血的小型猪中动脉失血试验模型,应用一次性使用速效止血包、速效止血粉进行止血处理,测定止血时间、创面局部最高温度及动物血压变化,取创面边缘组织,观察组织病理变化。一次性使用速效止血包与速效止血粉均能对小型猪前肢肱动脉损伤有快速止血效果,二者的止血时间无显著差异(P0.05);速效止血粉创面止血温度高于一次性使用速效止血包温度(P0.05),但二者都对创面及周围组织有一定程度的组织损伤。一次性使用速效止血包能对中动脉损伤引发的出血快速止血,是治疗急性出血的一种安全、有效的敷料。 相似文献
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家蚕是一种具有重要经济价值的绢丝昆虫,也是一种重要的模式生物。家蚕易受到环境中各种病原物的侵染而发生疾病。通过观察家蚕感染球孢白僵菌后血淋巴黑化程度的变化、家蚕血淋巴蛋白SDS-PAGE分析和微生物蛋白酶抑制剂的胶内活性染色分析,研究球孢白僵菌感染对家蚕血淋巴黑化和微生物蛋白酶抑制剂表达的影响。结果表明,球孢白僵菌感染会激活家蚕血淋巴的黑化反应,参与对真菌的免疫应答。SDS-PAGE分析显示,接种球孢白僵菌后120 h内家蚕血淋巴蛋白未发生明显的水解。胶内活性染色表明,家蚕血淋巴中存在一种白僵菌诱导型蛋白酶抑制剂SI-3,其抑制活性随着感染进程的推移而略有变化。研究结果不仅有助于阐明病原性真菌与家蚕的互作关系,发现新的抗真菌分子,而且对农林害虫防治具有一定的指导意义。 相似文献
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随着生物医学材料相关技术的不断发展,丝素蛋白的应用潜力逐渐凸显,已成为一种新型生物医学材料。丝素蛋白具有良好的生物相容性、生物降解性和低免疫原性,广泛应用于生物医学领域,成为组织工程的理想材料。文章以丝素蛋白为核心,对丝素蛋白运用于皮肤创面愈合、神经连接、血管再生、人造骨骼及人工软骨组织等领域的修复效果进展进行综述,介绍了丝素蛋白的分子结构和特点、丝素蛋白在不同领域的应用以及丝素蛋白在体外和体内的作用。此外,文章还对丝素蛋白在生物医学领域的应用进展进行了讨论和总结,对丝素蛋白材料目前发展的局限性和未来的发展趋势进行了展望。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献
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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献