Eclogitic diamond formation at jwaneng: No room for a recycled component   总被引：4，自引：0，他引：4  

P Cartigny  JW Harris  M Javoy 《Science (New York, N.Y.)》1998,280(5368):1421-1424

Eclogitic diamonds have a large range of delta13C values, whereas peridotitic diamonds do not. Paired delta15N-delta13C-N variations in 40 eclogitic diamonds from the Jwaneng kimberlite in Botswana show that neither the influence of recycled biogenic carbon nor the global and primordial heterogeneity of mantle carbon are likely for the origin of the large delta13C range; the data instead support a fractionation process. It is proposed that carbonatitic mantle melts from which diamonds crystallize undergo different evolutions before diamond precipitation, when percolating through either a peridotite or an eclogite. These different evolutions, reflecting the presence or absence of olivine, can account for their respective delta13C distributions.  相似文献   

Neurological diseases of ruminant livestock in Australia. II: toxic disorders and nutritional deficiencies     

JW Finnie  PA Windsor  AE Kessell 《Australian veterinary journal》2011,89(7):247-253

The second in this series of clinical reviews on neurological diseases in ruminant livestock in Australia examines toxic disorders associated with plant and microbial toxins as well as the neurological effects of vitamin and mineral deficiencies. The aim of these reviews is to assist in the surveillance of neurological diseases, especially the transmissible spongiform encephalopathies.  相似文献   

Large felid leucoencephalomyelopathy in a Sumatran tiger (Panthera tigris sumatrae) from an Australian zoo     

DM Hanshaw  DJ McLelland  J Manavis  JW Finnie 《Australian veterinary journal》2019,97(8):277-282

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Axonal Spheroid Accumulation In the Brainstem and Spinal Cord of A Young Angus Cow with Ataxia          下载免费PDF全文

DM Hanshaw  JW Finnie  J Manavis  AE Kessell 《Australian veterinary journal》2015,93(8):283-286

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Alzheimer type II astrocytes in the brains of pigs with salt poisoning (water deprivation/intoxication)     

JW Finnie  PC Blumbergs  MM Williamson 《Australian veterinary journal》2010,88(10):405-407

The finding of Alzheimer type II astrocytes, in addition to the pathognomonic combination of laminar cerebrocortical necrosis and eosinophil infiltration, in the brains of pigs is reported for the first time in cases of indirect salt poisoning following water deprivation.  相似文献   

Pyrrolizidine alkaloidosis of cattle associated with Senecio lautu     

JW NOBLE  JdeB CROSSLEY  BD HILL†  RJ PIERCE†  RA McKENZIE‡  M. DEBRITZ§  AA MORLEY¶ 《Australian veterinary journal》1994,71(7):196-200

Summary Serious incidents of pyrrolizidine alkaloidosis of cattle in 10 herds exposed to the Australian native plant, Senecio lautus (Asteraceae), were seen in central Queensland during 1988–1992. The deaths of 226 cattle were recorded. A mean of 8% of cattle died in affected groups (range 2 to 58%). Sickness and deaths usually occurred some months after access to S lautus. Typically, affected cattle lost body condition to the point of emaciation before dying and had persistent diarrhoea. Some animals developed abnormal behaviour and died after a shorter illness. Liver specimens from affected cattle in all herds contained lesions consistent with pyrrolizidine alkaloidosis. Thin layer chromatography of extracts of blood and liver samples from cattle from 5 herds detected pyrrolic metabolites. The identity of these was confirmed by mass spectroscopy on samples from one herd. Unseasonal autumn and winter rain after a dry summer appeared to favour growth of S lautus at the expense of other pasture species. A subsequent dry period promoted consumption of S lautus and was followed by a cluster of poisoning incidents.  相似文献   

Controlled parturition in sheep using clenbuterol hydrochloride     

J W PLANT  J K BOWLER 《Australian veterinary journal》1988,65(3):91-93

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弓形虫感染绵羊的诊断与治疗措施     

王家玮  肖玲  郑行义  魏成富  余均 《中国兽药杂志》2007,41(5):44-45

根据一起疑似弓形虫感染绵羊的发病情况、临床症状、病理剖检和实验室诊断,以及针对性治疗和控制,诊断该群绵羊疾病由弓形虫感染引起,并根据当地情况,提出了针对性的防治措施,为羊群弓形虫感染诊治提供参考和借鉴。  相似文献   

Comparison of root- and shoot-acting growth retardants on a grass/clover sward     

T. W. PARR  R. H. MARRS  L. A. BOORMANR  R. A. PLANT 《Weed Research》1987,27(1):69-78

The effects of six grass growth retardants, maleic hydrazide (±2,4-D), mefluidide, paclobutrazol, EL500 and a mixture of mefluidide with paclobutrazol on a grass/clover sward were compared over a 3-year period. Maleic hydrazide, which is the most commonly used retardant, gave poor levels of growth control except when used with 2,4-D. Greatest growth suppression, a 38% reduction in dry matter production from May to July, was obtained from a mixture of mefluidide and paclobutrazol. Differences were observed between the effects of the shoot-acting retardants, maleic hydrazide and mefluidide and the root-acting retardants, paclobutrazol and EL500. Shoot-acting retardants were less effective in wet weather and lasted for a shorter period than root-acting retardants. They also increased compensatory growth after a period of growth suppression, and increased the proportion of clover in the sward.  相似文献   

飞机喷洒青虫菌六号液剂防治马尾松毛虫     

PLANT PROTECTION INSTITUTE  HUBEI ACADEMG OF AGRICULTURAL SCIENCES et al. 《中国生物防治》1987,(2)

飞机喷洒青虫菌6号液剂,大面积防治松毛虫的试验表明,常量喷雾用菌剂1125—1500克/公顷和低量喷雾1500—2250克/公顷,2—3天后防效可达90％以上,而且具有明显的后效。但防治区低量喷雾的防治效率比常量快.青虫菌剂对林间天敌昆虫、鸟类、蜜蜂等均安全。  相似文献