深化馆系资料室共建-扬馆系所长   总被引：2，自引：0，他引：2  

杨晓玲 《农业网络信息》2006,(10):55-57

本文分析了系部资料室在服务教学科研工作中的特殊地位与优势，同时分析了系部资料室建设存在的一些问题，提出系部资料室信息深化服务的建议。  相似文献   

The effect of some Frescon analogs on the aquatic snail,Lymnaea stagnalis: II. Correlation of neurotoxicity to Molluscicidal effectiveness     

B.L. Brezden  D.R. Gardner 《Pesticide biochemistry and physiology》1980,13(2):178-188

Although the molluscicide Frescon is a strong neurotoxin to the Lymnaea stagnalis central nervous system in vitro, it is probable that the exposure of the whole animal to this molluscicide fails to result in central nervous system abnormalities: Frescon does not appear to reach the brain in sufficient quantity to disrupt its normal activity. However, only those Frescon analogs found to be neurotoxic were molluscicidal, suggesting some related mode, if not site, of action. Frescon and its analogs may act by affecting excitable tissues other than the nervous system (e.g., the snail musculature) by altering certain functional and/or structural membrane properties.  相似文献   

台湾农业金库对农渔会信用部的支持分析     

孙若祎  林丽琼  欧聪丽  徐枭 《福建农业大学学报(哲学社会科学版)》2014,(6):84-87

台湾农业金库是台湾农渔会信用部的上级主管机关,该金库成立以来,积极改善信用部经营状况,并已取得良好成效.以农业金库成立的背景及功能为出发点,探讨分析其对信用部的支持措施和支持困境,并从制度先行、政策支持、创新模式、构建体系等4个方面为大陆农村金融机构的改革和发展提供相关借鉴.  相似文献   

Effect of suckling intensity on human growth hormone binding, biochemical composition and histological characteristics of ovine mammary glands     

R.Michael Akers  John E. Keys 《Domestic animal endocrinology》1985,2(4):159-172

Suckling both, or only one contralateral mammary gland during 15 days postpartum was utilized to study lactogenic hormone binding to mammary microsomal membranes and quantitative mammary morphology in ewes. Binding of radiolabeled human growth hormone was specific for lactogenic hormones. Non-radiolabeled human growth hormone, ovine and bovine prolactin and human placental lactogen effectively competed with radiolabeled human growth hormone for binding sites but ovine and bovine growth hormone were completely ineffective. Specific binding of radiolabeled human growth hormone to 600 μg of membrane protein averaged 23 ± 3% in all lactating glands. Neither days postpartum nor treatment of contralateral mammary glands substantially altered hormone binding in lactating glands. Specific human growth hormone binding (6 ± 0.5%) in non-suckled glands (15 days postpartum both udder halves) was significantly lower (P<0.01) than in lactating tissue but only a moderate and variable reduction in specific binding was measured in membranes from glands non-suckled for 15 days but contralateral to a suckled gland (14 ± 4%). Specific binding was approximately doubled in assays with 600 compared with 300 μg of membrane protein and the pattern of binding among variously suckled glands was not changed by treatment of membranes with 4 M MgCl₂ prior to assay. Most secretory cells from all lactating glands had rounded, basally displaced nuclei, apical fat globules, secretory vesicles and abundant densely stained basal cytoplasm (ergastoplasm). Alveolar lumenal area was maximal (50% of tissue area) and stromal tissue area was minimal. After 15 days of non-suckling (both udder halves) mammary cells were engorged with lipid, ergastoplasm was reduced and nuclei were irregularly shaped and randomly displaced compared with lactating tissue. In addition, lumenal area was reduced and stromal tissue more evident. Lack of suckling for 5 days had little apparent effect on mammary cytology. Like lactogenic hormone binding, mammary tissue morphology was only moderately altered by 15 days of non-suckling when the remaining gland was suckled. RNA concentration was lowest (2.1 ± 0.3 mg/g) in mammary tissue from ewes in which neither gland was suckled for 15 days postpartum but non-suckling interval had no significant effect when contralateral glands were suckled. DNA concentration was not significantly influenced by suckling treatments. Relative lactogenic hormone binding closely corresponded to changes in cytological and biochemical indices of secretory cell function.  相似文献   

台湾中原大学建筑系研究生教育——赴台湾交流学习浅谈     

刘宾  崔晓晨 《山东林业科技》2011,41(4):116-118

台湾中原大学建筑系隶属于设计学院．从1960年代建系至今,根据其教学特点的演变其发展历程大致可以分为四个阶段。首创了以中国传统建筑为主耍研究内容钓支资纽,形成了独特的研究生建筑教育模式,并且发展了多元化的建筑教育理念。  相似文献   

Isolation of Pasteurella haemolytica and correlation with serum antibody response in clinically normal beef calves   总被引：1，自引：0，他引：1  

A W Confer  R E Corstvet  R J Panciera  J A Rummage 《Veterinary microbiology》1983,8(6):601-610

Bacteria from the nasal cavity and trachea were cultured, and serum antibody titers determined for Pasteurella haemolytica serotype 1 in 164 beef calves obtained from a closed herd on range pasture. At the first sampling, P. haemolytica serotype 1 was cultured from 16.4% of the calves. Antibody titers were determined by a quantitative fluorimetric method and the mean titer was 9.5 +/- 5.8. Fifty-seven randomly selected calves were used to study the correlation of serum antibody response and positive culture of P. haemolytica under natural conditions. Clinical signs of respiratory disease were not observed in those calves. During the observation periods, there was a two-fold increase in the percentage of calves that were culture positive. There was no significant difference between mean serum antibody titers or frequency distribution of antibody titers from the two samplings. Comparisons between serum antibody titers, rise in titers, and P. haemolytica isolation failed to reveal any significant correlation. Of the 9 calves that had a decline in antibody titer to P. haemolytica, none was culture positive. Seroconversion to respiratory viruses did not correlate with P. haemolytica related variables.  相似文献   

Insecticide screening with isolated nerve preparations for structure-activity relationships     

Kazu Takeno  Keiichiro Nishimura  James Parmentier  Toshio Narahashi 《Pesticide biochemistry and physiology》1977,7(5):486-499

The sciatic nerve-sartorius muscle preparation from the frog, the nerve-muscle preparation from the crayfish, and the abdominal nerve cord preparation from the crayfish have been compared for their sensitivity to various insecticides. The crayfish nerve cord was the most sensitive to insecticides and had a broad spectrum of sensitivity. A method was developed with this preparation to compare a large number of synthetic pyrethroids for their potencies to stimulate and block the nerve which is the primary target site. Both stimulating and blocking actions on the nerve can be assessed with this preparation. Certain pyrethroids are active insecticidally despite their weak nerve action, whereas some other pyrethroids are relatively moderate in killing insects despite their potent nerve action. Thus the new method can be effectively used to establish the true structure-activity relationship of synthetic pyrethroids or any other insecticides acting directly on the nerve.  相似文献   

The pathogenesis of experimental Haemonchus longistipes infection in camels     

I H Arzoun  H S Hussein  M F Hussein 《Veterinary parasitology》1984,14(1):43-53

The pathogenesis and clinical signs of Haemonchus longistipes infection were studied in four experimentally infected camels two of which were adults and the other two were young. In the former animals, an acute infection developed, characterized by mucoid diarrhoea, anorexia, anaemia, loss of body weight, oedema of the lower parts of the limbs, general malaise and death at 8-10 weeks post-infection. In the two younger camels, a less dramatic disease was encountered with less severe symptoms and no oedema, but also terminating fatally at 19-20 weeks post-infection. Parasitological, haematological and biochemical parameters were determined during the course of the infection and were mostly comparable with those usually encountered in haemonchosis of other animals.  相似文献   

Electrophoretic comparison of the genomes of North American bluetongue viruses, one Australian bluetongue virus, and three other related orbiviruses   总被引：2，自引：0，他引：2  

D L Knudson  W K Butterfield  R E Shope  T E Walton  C H Campbell 《Veterinary microbiology》1982,7(4):285-293

The genomes of U.S. bluetongue viruses, an Australian bluetongue virus, and three other related orbiviruses were analyzed by polyacrylamide gel electrophoresis. The genomes were comprised of ten segments of double-stranded (ds) RNA. Estimates of the molecular weights of the dsRNA segments revealed that the U.S. bluetongue serotypes were remarkably similar. Although the dsRNA profiles of the viruses exhibited common segments, each virus had a distinct dsRNA profile. The usefulness of the genome analysis as a diagnostic tool for identification and for epidemiologic studies is discussed.  相似文献   

The mode of action and neurotoxicity of mirex,chlordecone, and four hydrogenated mirex analogs     

J.R. Bloomquist  D.L. Shankland 《Pesticide biochemistry and physiology》1983,19(3):235-242

The toxicity and neurological effects of mirex, chlordecone, and four hydrogenated mirex analogs were evaluated on the American cockroach. The severity of poisoning symptoms correlated with the ability of each compound to increase spontaneous activity and prolong synaptic afterdischarge in ganglia of the ventral nerve cord. Afterdischarge across the metathoracic ganglion was consistent with a characteristic wing splaying symptom in mirex-poisoned cockroaches. The actions of hemicholinium-3 and nicotine on nerve cords from mirex-poisoned cockroaches are described and are consistent with a hypothesis that the increased spontaneous activity and afterdischarge are the result of enhanced transmitter release in ganglia of poisoned animals.  相似文献