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《动物医学进展》2015,(12)
为了展示金黄色葡萄球菌生物被膜领域的整体研究状况和研究热点,基于CitespaceⅢ研究了1995年-2015年Web of Science~(TM)核心合集数据库所收录的有关金黄色葡萄球菌生物被膜的3 582条科技文献,分析了年度发文量,绘制了国家、机构、作者、被引期刊、被引文献及关键词的知识图谱。金黄色葡萄球菌生物被膜研究领域的发文量从1995年-2014年持续上升,2015年有延续的趋势;研究金黄色葡萄球菌生物被膜的国家和机构及刊登该领域文献的期刊主要分布在北美洲和欧洲,大学是该研究领域的主要研究机构;金黄色葡萄球菌生物被膜的研究热点集中于生物被膜的形成机制和抑制药物的研发两个方面,未来一段时间的研究方向将侧重于阻碍生物被膜形成和促进已形成生物被膜瓦解的药物研发。 相似文献
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民族兽药学是研究不同文化背景的民族认识与利用植物防治动物疫病及其相关知识的一门学科,国内外对该领域研究在不断增加,开展该领域的文献分析对于指导相关研究具有重要的作用。以1986~2016年30年间Web of Science核心文集收录的文献为研究对象,利用Web of Science在线工具和HistCite软件对民族兽药学文献进行详细的分析。获得了该领域研究核心作者、重点期刊、研究的机构、影响力较高的国家(地区)和研究的热点等,得到了该领域的引文编年图。30年来民族兽药学每年的文献量及引用频次都在增加,学科发展主要集中在印度、巴基斯坦、南非、巴西等国家,研究热点主要集中在植物科学、民族药物学、兽药科学、药物综合补充等方面。通过对民族兽药学30年文献总结和讨论,为民族兽药学科的发展奠定一定理论基础。 相似文献
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基于共词分析的兽医分子生物学领域研究热点分析及初步展望 总被引:1,自引:0,他引:1
在选择国内近十年兽医分子生物学研究领域的高频关键词基础上,借助共词分析法,利用pajek软件对CNKI收录的1 242篇论文的关键词进行共词分析和可视化展示,探索兽医分子生物学领域的研究热点和进展,将兽医分子生物学研究领域划分为六大区域:病毒基因与蛋白质体系研究、克隆技术研究、病毒的序列分析研究、分子生物学与相关基础学科基础理论研究、高传染性病毒疫苗研究及新城疫病毒研究。再根据分析结果和相关研究文献,对各个区域主要研究内容进行分析和探讨,并针对我国分子生物学领域的研究提出一些展望。 相似文献
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可吸收手术缝合线的研究进展 总被引:4,自引:0,他引:4
医用可吸收手术缝合线的研究是生物医用高分子研究中最活跃的领域之一,已广泛应用于医学和动物医学的外科手术中。本文对几种天然及人工合成可吸收手术缝合线在体内的吸收情况、降解性能及研究状况进行了详细的阐述,并对它们的优缺点作出了科学的评价。同时,描述了我国可吸收手术缝合线研究现状。 相似文献
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为探讨近年来国内乳制品研究领域的发展现状与演化趋势,该研究基于中国知网数据库筛选出的4 784篇乳制品相关文献,运用文献计量CiteSpace工具进行机构、作者、关键词、研究前沿等信息的知识图谱可视化分析,对乳制品领域的热点及发展情况进行研究。结果显示,2000年至今,国内乳制品研究领域的发文情况可划分为高速增长期和平稳发展期,研究内容呈现由关注技术发展到更关注产业发展相关内容,部分作者之间形成较密切的核心作者群,但大多数作者仍呈分散独立发文状态。关键词集中于发酵工艺、奶业发展、相关政策、乳制品相关产品及应用领域。在研究前沿,乳制品相关研究在持续提高检测技术水平基础上,呈现更加关注乳制品产业链、工艺优化及相关影响因素分析等趋势。本文通过对相关文献的可视化整理,从文献发表量等多个方面综合展现近20年国内乳制品行业的研究现状,为未来乳制品的研究与行业发展提供理论依据、参考借鉴与方向指引。 相似文献
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《动物医学进展》2016,(2)
基于CitespaceⅢ研究了1995年-2015年Web of ScienceTM核心合集数据库所收录的金黄色葡萄球菌性奶牛乳房炎相关的1 797条科技文献,分析了年度发文量,绘制了国家、机构、作者、被引期刊、被引文献及关键词的知识图谱。全世界金黄色葡萄球菌性奶牛乳房炎研究领域的发文量从1995年-2012年持续上升,2013年发文量开始呈下滑的趋势;研究金黄色葡萄球菌性奶牛乳房炎的国家和机构主要分布在美洲和欧洲,大学是该研究领域的主要研究机构;金黄色葡萄球菌性奶牛乳房炎的研究热点集中于病原菌的分离鉴定、药物敏感性检测和致病机理探究,该领域未来一段时间的研究方向将侧重于金黄色葡萄球菌生物被膜相关的研究。 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