Hyperadrenocorticism associated with excessive sex hormone production by an adrenocortical tumor in two dogs.     

H M Syme  J C Scott-Moncrieff  N G Treadwell  M F Thompson  P W Snyder  M R White  J W Oliver 《Journal of the American Veterinary Medical Association》2001,219(12):1725-8, 1707-8

An 11-year-old spayed female Labrador Retriever and a 9-year-old castrated male miniature Poodle were evaluated because of clinical signs of hyperadrenocorticism. Cortisol testing did not support a diagnosis of hypercortisolemia in either dog; however, imaging studies revealed unilateral adrenal tumors in both dogs. Serum concentrations of 17-hydroxyprogesterone, progesterone, and estradiol were high in both dogs, and androstenedione concentrations were also high in 1 dog. It is suspected that sex hormone secretion by the adrenal tumors in these dogs resulted in clinical signs of hyperadrenocorticism. Clinical signs and hormonal abnormalities resolved in the male dog after surgical resection of the tumor. There was no improvement in clinical signs after treatment with mitotane in the female dog, which died 2 months after diagnosis. Histologic evaluation confirmed the presence of adrenocortical carcinoma in both dogs.  相似文献   

Hypercalcaemia associated with chronic lymphocytic leukaemia in a Giant Schnauzer.     

M Kleiter  R Hirt  G Kirtz  M J Day 《Australian veterinary journal》2001,79(5):335-338

A 7-year-old male Giant Schnauzer was referred with a history of severe vomiting, lethargy, weight loss, polydipsia and polyuria. Detailed investigations revealed leucocytosis with a marked lymphocytosis, mild non-regenerative anaemia, thrombocytopenia, hypercalcaemia and azotaemia. Circulating lymphocytes were small and well-differentiated, and the same lymphoid population was present in bone marrow. Chronic lymphocyctic leukaemia with associated paraneoplastic hypercalcaemia was diagnosed. Immunohistochemical staining of a bone marrow biopsy revealed a neoplastic B-cell line expressing CD79. The dog responded to therapy with prednisolone and chlorambucil for a period of 8 months.  相似文献   

Effects of Benzyl Adenine and Abscisic Acid on Grain Yield and Yield Components in Triticale and Wheat     

T. Sivakumar  Virendranath  & G. C. Srivastava 《Journal of Agronomy and Crop Science》2001,186(1):43-46

Grain yield and yield components (grains per ear, grain weight, 1000-grain weight, ear weight, ear seed ratio and dry matter partitioning between ear and seed) were examined in a wheat genotype (PBW-343) with well-filled grains and a Triticale genotype (DT-46) with poorly filled grains (showing grain shrivelling) grown in pots. Six days after anthesis (DAA), benzyladenine (BA) @2 µg ear⁻¹ and abscisic acid (ABA) @4 µg ear⁻¹ were injected at the base of the mother shoot ear in both species. It was observed that, in both wheat and Triticale , BA increased the grain weight, grain number and partitioning of dry matter between ear and seed, whereas ABA decreased the grain weight, grain number and dry matter partitioning between ear and seed. However, these decreases were slower in Triticale than in wheat. BA treatment increased the grain dry matter accumulation, which in turn resulted in better filling of grains and increased the grain weight in both wheat and Triticale . The average grain weight of Triticale was lower than that of wheat. Thus, it appears that variation in grain weight between wheat and Triticale might be due to different availabilities of growth-promoting phytohormones such as cytokinins and assimilates.  相似文献   

我国农业区域开发简史及历史经验     

王缨 《湖北农学院学报》1990,(3)

本文讨论了中国农区开发之始、几个主要农区的深开发、黄淮江湖的连片开发、海河流域的开发、其它农区的开发和农区开发的历史经验与教训。完好的灌溉系统、导致深开发的人工运河和农业技术是开发成功的要素。  相似文献   

有初始缺陷板件超屈曲强度的半分析法研究     

舒兴平  王世纪 《湖南农业大学学报(自然科学版)》1990,17(2)

本文应用大挠度理论分析了初始缺陷对板件超屈曲强度的影响,并为板件后屈曲分析提出了一个样条函数半分析计算法.该法对各种载荷及位移边界条件板件均可进行计算,与有限元法等相比较,具有计算量少,精度高等显著特点.数值计算结果为冷弯型钢结构设计提供了较完善的理论依据.  相似文献   

Survey of tick infestation and tick-borne ehrlichial infection of dogs in Ishigaki Island, Japan.     

H Inokuma  G Nane  T Uechi  Y Yonahara  P Brouqui  M Okuda  T Onishi 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2001,63(11):1225-1227

Twelve (54.5%) of 22 free-roaming dogs in Ishigaki Island had tick infestation identified as Rhipicephalus sanguineus. There were 121 ticks recovered and consisted of 28 females, 58 males, 22 nymphs and 3 larvae. Infection of dogs possibly with canine ehrlichial pathogens was examined by both indirect immunofluorescence assay and polymerase chain reaction (PCR). Two dogs of the 13 examined were sero-positive for the human granulocytic ehrlichia agent, and one of two dogs was PCR positive for Ehrlichia platys. This dog had platelet numbers slightly lower than normal value, however, no morulae were found within platelet on peripheral blood smear stained with Giemsa.  相似文献   

Trends in mortality ratios among cattle in US feedlots.     

G H Loneragan  D A Dargatz  P S Morley  M A Smith 《Journal of the American Veterinary Medical Association》2001,219(8):1122-1127

OBJECTIVE: To evaluate trends in feedlot cattle mortality ratios over time, by primary body system affected, and by type of animal. DESIGN: Retrospective cohort study. ANIMALS: Approximately 21.8 million cattle entering 121 feedlots in the United States during 1994 through 1999. PROCEDURES: Yearly and monthly mortality ratios were calculated. Numbers of deaths were modeled by use of Poisson regression methods for repeated measures. Relative risks of death over time and by animal type were estimated. RESULTS: Averaged over time, the mortality ratio was 12.6 deaths/1,000 cattle entering the feedlots. The mortality ratio increased from 10.3 deaths/1,000 cattle in 1994 to 14.2 deaths/1,000 cattle in 1999, but this difference was not statistically significant (P = 0.09). Cattle entering the feedlots during 1999 had a significantly increased risk (relative risk, 1.46) of dying of respiratory tract disorders, compared with cattle that entered during 1994, and respiratory tract disorders accounted for 57.1% of all deaths. Dairy cattle had a significantly increased risk of death of any cause, compared with beef steers. Beef heifers had a significantly increased risk of dying of respiratory tract disorders, compared with beef steers. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggested that although overall yearly mortality ratio did not significantly increase during the study, the risk of death attributable to respiratory tract disorders was increased during most years, compared with risk of death during 1994. The increased rates of fatal respiratory tract disorders may also reflect increased rates of non-fatal respiratory tract disorders, which would be expected to have adverse production effects in surviving animals.  相似文献   

入世后国有大中型种子企业发展的思考     

王铁臣 《种子世界》2001,(12):8-9

发展农业生产、提高农产品效益的最有效最经济的途径是种子.故此我们需要从战略的高度来关注种子公司的发展.那么,在我国加入WTO(世贸组织)之后,我国的种子公司如何面对新的机遇与挑战,如何在国际竞争中立于不败之地,如何发展和壮大中国的种子产业,值得深思.  相似文献   

建筑物的机械排烟     

曹顺学  王鹏翔  陈星  李双庆  于宏元  毕海源 《林业科技情报》2001,33(4):83-83

本文作者从实际经验出发,详细阐述了建筑物的机械排烟原理及设计施工,管理中的各项注意事项。  相似文献   

Propagation techniques on root turion sprout browse ofPopulus davidiana Dode     

Xing Ya-juan  Wang Qing-gui  Wang Yan-he 《林业研究》2001,12(2):143-145

The root segments selected from dominant trees ofPopulus davidiana Dode were taken as reproductive material and were buried in different depths to carry out the reproduction of root turion sprout. The affecting factors of gemination rate, survival rate, and height growth for cutting wood of root sprout were comparatively analyzed. The results showed that the best suitable substrate for burying root is pearlite, with a germination rate of 15.16%. 3–4-cm root segments has the highest rate of germination (12.4%). The mixture of sand and soil (2∶1) is the best cutting substrate, with a survival rate of 81.3%, while as to height growth of cutting wood, the mixture of turfy and soil (1∶1) is the best. The cutting woods selected from different positions of stem show difference in height growth. The cutting wood from top stem is higher obviously than those from middle or low stem. Biography: XING Ya-juan (1969-), female, assistant researcher in Forest Research Institute of Heilongjiang Province, Harbin 150040, P. R. China. Responsible editor: Song Funan  相似文献