纳米技术在精细化工中的应用浅谈

本文对纳米技术及纳米材料的制备进行了简单的介绍,然后重点对纳米技术在精细化工中的应用进行了具体的阐述,对纳米材料作为催化剂作用、添加剂作用以及医学制剂作用的特点进行了详细的论述,最后对纳米技术在化工领域的应用前景进行了展望。     

一种新型的畜牧业资源——蜂花粉

对蜂花粉的资源状况、营养组成及其生物学功能进行了分析 ,对其在饲料中的应用现状和作为免疫增强剂的研究进展进行了综述 ,并对蜂花粉在畜牧业中的应用前景进行了展望     

浅谈新会计准则对资产评估的影响

会计行业在不断的发展,在当前会计环境下,相关工作人员制定出了新的会计准则,这对资产评估有着一定影响,由于新会计准则对资产认定、价值类型以及评估方式进行了调整,所以企业资产评估的结果产生了较大的影响.本文对资产评估业务的发展现状进行了分析,还对新会计准则的主要变化进行了介绍,对新会计准则对资产评估的影响进行了探讨,以供参考.     

柴油发电机功率波动问题的分析与解决

本文介绍了国内某核电厂柴油发电机组的机型号及功用,总结概述了柴油发电机组在调试阶段所需进行的试验流程及试验内容,对某次试验过程中柴油机功率波动的异常现象进行了描述,针对该功率波动的问题,作者结合该柴油机本身特点进行了分析,在解决该问题的同时,并对造成该现象的原因进行了解释。     

量子点的制备及应用进展

本文分别从量子点的概念、特性、制备方法、表面修饰等方面对量子点进行了描述及讨论,在此基础上,对量子点在生物传感器方面的应用进行了,最后分析了量子点生物传感器的存在的问题,对其未来发展趋势进行了展望。     

益生素在动物生产中的应用

笔者就益生素在动物生产中的应用及在应用中需注意的问题进行了阐述,并对益生素在今后的发展方向进行了展望.     

绿色植物在大气甲烷循环中的作用

甲烷是引起气候变暖的一种重要温室气体,近年来一些研究发现陆地植物具有排放甲烷的能力,打破了植物仅为连通土壤-大气气体交换通道的原始理念,但由于其发生机理尚无法解释,也引起了人们的质疑。对绿色植物在大气甲烷循环中的作用进行了文献综述,对主要研究结果之间的差异进行了比较,同时就未来绿色植物在大气甲烷循环中的作用进行了阐述,拟为进行植物在地球甲烷循环中的功能及潜力的估测提供理论依据。     

菌糠在饲料中的应用研究

对食用菌废弃菌糠的资源量及其利用现状进行了分析,对其营养价值进行了归纳总结,对其消化率和饲用安全性等进行了阐述,简要概括了菌糠在畜禽日粮中的应用效果,并简单介绍了其加工调制方法及其在生产应用中需注意的问题和事项.     

中草药饲料添加剂在牛羊生产上的应用研究

对中草药饲料添加剂在牛羊生产中的应用现状进行了综合阐述,分析了中草药饲料添加剂在实际生产过程中存在的问题,并对中草药饲料添加剂的应用前景进行了展望.     

国省道公路资金筹集渠道及方法研究

在新形势下,对制约公路建设和发展的主要因素和问题进行了分析,在传统融资方法的基础上,对资金筹集渠道进行了研究,提出了招商引资等新型国省道融资方法。     

Pathology in the medical curriculum in the United Kingdom

In the United Kingdom, the medical students of yesteryear undertook a detailed pathology course, often with its own major examinations. This contributed to the increasing overload of factual information that was common in medical curricula. Following General Medical Council reports on medical education, pathology is now more fully integrated into clinical work and into problem-based learning, albeit with greatly reduced contact time with pathologists. Teaching methods have shifted from didactic presentations, such as lectures, to more varied methods, with emphasis on self-access and interactivity. Technological advances have brought well-illustrated textbooks, computer-assisted learning programs, Web resources, and electronic communication. There has been a decline in the role of museum specimens, microscopy, and, partly following a worldwide trend and partly following adverse media publicity, the traditional autopsy. Assessment methods have evolved, with integration of pathology into wider examinations. The greater drive toward increasing funding through the Research Assessment Exercise has had an adverse effect on teaching throughout universities. Despite these setbacks, the importance of pathology as a clinical discipline will ensure its continued role in medical education.     

Disturbance in the growth of the radius in dogs

In a 4-year period nine dogs have been met in which there was incomplete growth of the radius. The condition was unilateral in eight dogs and bilateral in one. Two were littermates. The defect is due to premature cessation of growth of the distal growth plate of the radius but the cause of this is not precisely known. It is recognized by characteristic radiographic changes in radius length, elbow joint space and premature closure of the distal growth plate of the radius. A method of surgical treatment has been devised and has proved beneficial in five dogs. Zusammenfassung. In einer Vierjahresperiode wurden neun Hunde beobachtet, bei denen ein unvollständiges Wachstum des Radius vorlag. Bei acht Hunden war der Zustand nur auf einer Seite zu finden, bei einem Hund auf beiden Seiten. Zwei der Hunde gehörten zum gleichen Wurf. Der Mangel ist auf verfrühte Wachstumseinstellung der distalen Wachstumsplatte des Radius zurückzuführen, jedoch ist die Ursache davon nicht genau bekannt. Er wird an charakteristischen radiographischen Veränderungen der Radiuslänge, des Ellbogengelenkzwischenraums und vorzeitigem Abschluss der distalen Wachstumsplatte des Radius erkannt. Es wurde eine chirurgische Behandlungsmethode entwickelt, die sich bei fünf Hunden als nutzlich erwies. Résumé. Au cows d'une période de 4 ans on a observé 9 cas de croissance incomplète du radius chez des chiens; l'anomalie était unilatérale dans 8 cas et bilatérale dans un cas; deux chiens appartenaient à la même portée. L'anomalie est due à l'arrêt prématuré de croissance de la plaque de croissance distale du radius, mais la cause n'en est pas encore connue d'une manière précise. Le diagnostic se fait par les signes radiologiques caractéristiques, modifications de la longueur du radius, de l'articulation du coude et soudure prématurée de la plaque de croissance du radius. On a élaboré une méthode de traitement chirurgical, qui s'est montrée favorable chez 5 chiens.     

Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog

Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum.     

国内生态恢复研究进展

本文介绍了生态恢复的研究进展,从生态恢复的定义、退化生态系统的指标等方面进行阐述,重点对国内在恢复生态学方面的进展做了介绍。对当前的人工草地、草地农业的研究情况做了一些概述。     

国内生态恢复研究进展

本文介绍了生态恢复的研究进展,从生态恢复的定义、退化生态系统的指标等方面进行阐述,重点对国内在恢复生态学方面的进展做了介绍.对当前的人工草地、草地农业的研究情况做了一些概述.