Australian journal of biological sciences最新文献_第7页

Bluetongue and related viruses in New South Wales: isolations from, and serological tests on samples from sentinel cattle. 新南威尔士州的蓝舌病和相关病毒:从哨岗牛身上分离和对样本进行血清学检测。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880579

I R Littlejohns, R W Burton, J M Sharp

{"title":"Bluetongue and related viruses in New South Wales: isolations from, and serological tests on samples from sentinel cattle.","authors":"I R Littlejohns, R W Burton, J M Sharp","doi":"10.1071/bi9880579","DOIUrl":"https://doi.org/10.1071/bi9880579","url":null,"abstract":"Sentinel cattle at a number of localities in northern and central coastal New South Wales were sampled over the summer and autumn seasons of the years 1979, 1980 and 1981. A total of 118 orbiviruses were isolated; 99 were of the Palyam group, 15 were of the epizootic haemorrhagic disease (EHD) of deer group, and 4 of the bluetongue group. The Palyam group viruses were identified by serotype as 68 Bunyip Creek, 23 CSIRO Village, 7 D'Aguilar and one was not typed. The EHD viruses were identified as 13 type 5 and 2 type 6. All 4 bluetongue viruses were type 21. There was also convincing serological evidence that bluetongue type 1 infection occurred in 1980. Antibody to the bluetongue group, as demonstrated in a gel diffusion precipitin test, was often transient. It appeared to be mostly cross-reactive with, and induced by, other orbivirus infections, particularly those of the EHD group. Viruses of the Palyam group also seemed to be implicated in some circumstances. Where infections by viruses of the bluetongue group were demonstrated, the precipitating antibody responses to a bluetongue group antigen were not noticeably stronger than many which followed EHD virus infection. The results generally confirm previous conclusions, deduced from serological surveys, regarding the frequency of orbivirus infections, the presence of bluetongue viruses, and the transient nature of many bluetongue group antibody reactions.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":"41 4","pages":"579-87"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13994347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Group-specific and type-specific gel diffusion precipitin tests for bluetongue virus serotype 20 and related viruses. 20型蓝舌病病毒及相关病毒的群体特异性和类型特异性凝胶扩散沉淀试验。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880553

J M Sharp, I R Littlejohns, T D St George

引用次数: 4

Development of a radioimmunoassay for plasma C-peptide in sheep: kinetics of C-peptide and effects of exogenous growth hormone and glucose on insulin and C-peptide. 绵羊血浆c肽放射免疫测定法的建立:c肽动力学及外源生长激素和葡萄糖对胰岛素和c肽的影响。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880517

D Leenanuruksa, G H McDowell

引用次数: 2

Statement regarding: Effects of scopolamine hydrobromide on the development of the chick and rabbit embryo. 氢溴酸东莨菪碱对鸡和兔胚胎发育的影响。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880589

引用次数: 1

Relationship between plasma zinc, angiotensin-converting enzyme, alkaline phosphatase and onset of symptoms of zinc deficiency in the rat. 血浆锌、血管紧张素转换酶、碱性磷酸酶与大鼠缺锌症状的关系

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880343

C L White

{"title":"Relationship between plasma zinc, angiotensin-converting enzyme, alkaline phosphatase and onset of symptoms of zinc deficiency in the rat.","authors":"C L White","doi":"10.1071/bi9880343","DOIUrl":"https://doi.org/10.1071/bi9880343","url":null,"abstract":"Recent evidence suggests that changes in plasma zinc concentration may play a central role in the development of early lesions of zinc deficiency. The aim of the following work was to better understand events occurring in plasma during the onset of zinc deficiency, and to investigate biochemical mechanisms by which plasma zinc may exert its effects. Fifty male weanling rats of 90 g weight were allocated to five treatment groups of ten rats each. Treatments were: 1, zinc deficient, mixed diet (1-2 mg Zn per kg): 2, zinc deficient, self-select diet; 3, zinc repleted; 4, control, pair fed; 5, control, ad libitum fed. With the exception of treatment 1, which consisted of a 25% casein diet, all rats were offered protein as a separate component of the diet. Control rats received zinc in the drinking water (100 mg l-1). The sequence of events following initiation of zinc deficiency were: reduced plasma zinc concentration (2 days), reduced plasma angiotensin-converting enzyme and alkaline phosphatase activities (3-4 days), reduced feed intake and growth (5-6 days) and reduced percentage protein intake (12 days). Plasma zinc concentration in the deficient rats was inversely correlated with the growth rate of the rat over the previous 24 h. Zinc repletion resulted in marked overshoot in plasma zinc concentration (300%) and converting-enzyme activity (150%) within 24 h, but a return to normal within 72 h. Alkaline phosphatase activity responded likewise, albeit more slowly. Protein self selection had no effect on the manifestations of zinc deficiency, although reduced protein intake was associated with lower plasma zinc concentration. The results provide evidence of a role for plasma zinc in the development of early clinical signs of zinc deficiency, possibly acting biochemically through reduced activity of zinc-dependent peptidases such as angiotensin-converting enzyme.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":"41 3","pages":"343-56"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1071/bi9880343","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13992997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effects of lys-beta-urogastrone in vivo. 赖氨酸- β尿胃泌素在体内的作用。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880463

A J Campbell, S S Adams, M W Davey, D A Titchen

{"title":"Effects of lys-beta-urogastrone in vivo.","authors":"A J Campbell, S S Adams, M W Davey, D A Titchen","doi":"10.1071/bi9880463","DOIUrl":"https://doi.org/10.1071/bi9880463","url":null,"abstract":"Lys-beta-urogastrone, an analogue of human beta-urogastrone with an additional N-terminal lysine, was shown to have similar effects in mice and sheep to mouse epidermal growth factor (mEGF). Lys-beta-urogastrone in doses of 0.18-3.24 micrograms g-1 body weight caused both precocious separation of eyelids and eruption of incisors in neonatal mice. In 17 sheep, intravenous infusion of the urogastrone analogue over c. 24 h led, towards the end of infusion, to erythema of the muzzle, caused reductions in voluntary food intake (with doses greater than or equal to 50 micrograms kg-1) and generally easier manual harvesting of the fleece (with infusions greater than or equal to 81 micrograms kg-1), with spontaneous shedding of the fleece (c. 14 days after infusions of greater than or equal to 116 micrograms kg-1). In five sheep infusions of 25, 38, 50, 83 and 118 micrograms kg-1 fleece-free body weight, plasma concentrations of lys-beta-urogastrone were near maximal 20 h after the infusions started and were, respectively, 1.1, 1.7, 5.5, 18 and 79 micrograms l-1 plasma. Plasma concentrations of gastrin, somatostatin and pancreatic polypeptide were determined in these five sheep. Plasma gastrin rose sixfold by the end of infusions of 25 micrograms kg-1 of the urogastrone analogue, and tenfold with the higher doses of infusion. Although plasma somatostatin concentrations were variable, a consistent trend was observed; lower levels were apparent during the lys-beta-urogastrone infusions. There was no discernible trend in pancreatic polypeptide concentrations.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":"41 4","pages":"463-74"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14043280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Secretion of LH, FSH and oestradiol-17 beta during the follicular phase of the oestrous cycle in the ewe. 母羊发情周期卵泡期黄体生成素、卵泡刺激素和雌二醇-17的分泌。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880303

G B Thomas, G B Martin, J R Ford, P M Moore, B K Campbell, D R Lindsay

引用次数: 17

Post-heparin triacylglycerol lipases in ovine plasma. 绵羊血浆中肝素后三酰甘油脂肪酶。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880215

R K Tume, R F Thornton, G W Johnson

{"title":"Post-heparin triacylglycerol lipases in ovine plasma.","authors":"R K Tume, R F Thornton, G W Johnson","doi":"10.1071/bi9880215","DOIUrl":"https://doi.org/10.1071/bi9880215","url":null,"abstract":"Lipoprotein lipase and hepatic lipase have been shown to be present in the post-heparin plasma of sheep. Intravenous injection of heparin into sheep produced a rapid increase in the free fatty acid concentration and lipolytic enzyme activity of the plasma, both peaking within 5-15 min and then falling to pre-heparin levels within 30-60 min. Lipolytic activity was not detected in plasma before heparin treatment. Two distinct lipolytic activities were separated from the plasma by chromatography on heparin-Sepharose 6B. Lipoprotein lipase was identified on the basis that the lipolytic activity was dependent upon the addition of plasma, inhibited by 1M NaCl, and inhibited by a specific antiserum against lipoprotein lipase. The second lipolytic activity of plasma was identified as hepatic lipase, as it was not dependent upon plasma for activity, nor was it inhibited by 1M NaCl or antiserum against lipoprotein lipase. Its properties were identical to the lipase extracted from the liver of sheep. Lipoprotein-lipase activity, but not hepatic-lipase activity, was dependent upon the nutritional state of the sheep at the time of heparin injection. However, hepatic lipase comprised a significant proportion of the total lipolytic activity.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":"41 2","pages":"215-21"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14398724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Control of ram sperm adenylate cyclase by divalent cations. 二价阳离子对公羊精子腺苷酸环化酶的控制。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880377

P P Goh, I G White

引用次数: 8

Effects of growth hormone administration on wool growth in merino sheep. 生长激素对美利奴羊羊毛生长的影响。

Australian journal of biological sciences Pub Date : 1988-01-01 DOI: 10.1071/bi9880177

P C Wynn, A L Wallace, A C Kirby, E F Annison

{"title":"Effects of growth hormone administration on wool growth in merino sheep.","authors":"P C Wynn, A L Wallace, A C Kirby, E F Annison","doi":"10.1071/bi9880177","DOIUrl":"https://doi.org/10.1071/bi9880177","url":null,"abstract":"The effects of daily administration of 10 mg of highly purified ovine growth hormone (GH) for a period of 4 weeks on wool growth have been measured in 12 Merino ewes fed either a calculated maintenance energy intake or 1.6 times this amount (six on each ration). Concentrations of hormones, glucose, urea, alpha-amino N and amino acids in the blood were monitored and faeces and urine collected for measurement of nitrogen balance. Wool growth rate decreased by 20% during the 4 weeks of GH treatment in sheep fed the high energy diet, largely because of reduced wool fibre diameter. This was followed by restoration of normal growth and then an increase of up to 20% above control levels, a response which persisted for 12 weeks following cessation of GH administration, and which was due to increases in both fibre length and diameter. GH administration caused marked increases in plasma concentrations of GH, insulin and somatomedin C, glucose and free fatty acids, all of which returned to basal levels following cessation of GH administration. No consistent changes in plasma concentration of T3, T4, cortisol, prolactin or alpha amino N were detected. Plasma urea and methionine levels decreased during GH treatment and returned to, or were raised above, basal levels after the GH treatment period. GH injection also resulted in a net retention of N during treatment, followed by a transient period of net N loss. The GH-induced changes in wool growth may be caused by a change in the partitioning of amino acids between the muscle mass and the skin. No other contributing factor(s) were identified.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":"41 2","pages":"177-87"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1071/bi9880177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14209852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29