关于我省农业产业结构调整的几点思考

江西是传统的农业大省,要调整农业产业结构,就必须增强广大农村基层干部调整农业产业结构的紧迫感,结合市场需求,发挥我省优势,理清调整思路,尤其在农村政策、农业信息、农产品加工与销售等方面要强化政府服务的职能.只有这样,才能真正做到增加农民收入,减轻农民负担,促进农业发展,保证农村稳定.     

半胱胺对大鼠血脂代谢和抗氧化能力的影响

在高能量/高脂日粮条件下,研究半胱胺对大鼠血脂和机体抗氧化能力的影响。结果表明:高能量/高脂日粮提高大鼠血浆TC,TG,TC/HDL-C,TG/HDL-C的水平;与高能量/高脂日粮组相比,添加半胱胺降低TC,TG,LDL-C,TC/HDL-C,TG/HDL-C和血糖的水平;高能量/高脂日粮不能诱导明显的氧化应激,添加半胱胺日粮对氧化还原指标影响不明显。表明高能量/高脂日粮能提高血脂水平,添加半胱胺可恢复血脂。     

THIABENDAZOLE RESISTANCE IN FIELD POPULATIONS OF HAEMONCHUS CONTORTUS

Six populations of H. contortus were selected for a study of thiabendazole resistance from a collection of 40 populations made during a survey of the efficiency of thiabendazole on the Northern Tablelands of New South Wales. Based on survey results, 3 of these populations were considered susceptible and the remaining 3 were considered resistant. However, when these populations were compared with a known susceptible strain on the ability of their eggs to hatch in a solution containing thiabendazole and 0.1% NaCl all 6 had significantly greater LC50's. The resistance ratios of the LC50 for each of the 6 populations to that of the known susceptible strain were 5.1, 4.3, 3.2, 3.1, 2.3, and 1.6 respectively. Following dosing of their host with 44 mg/kg thiabendazole the resistance ratios of the survivors increased to 5.4, 5.1, 4.7, 4.4, 3.1 and 2.4. Eggs produced by the F1 generation of the worms surviving 44 mg/kg thiabendazole did not revert back to the lower LC50's of the unselected parents. Rather the LC50 remained at a level near that of a known highly resistant strain of H. contortus.     

Speech: relation of nonfluency to information value

In spontaneous speech and oral reading of stutterers, likelihood of nonfluency occurring on any word is not related to the amount of information carried by that word. The same is true for spontaneous speech of normal speakers. Previous contrary findings can be accounted for by the relationship between information value and word length.     

High performance liquid chromatography and pharmacokinetics of the non-steroidal anti-inflammatory drug oxindanac in calves

A high-performance liquid chromatographic method for the determination of the non-steroidal anti-inflammatory drug, oxindanac, in calf plasma is described. Recoveries over the concentration range 0.3 75 to 62.5 μg/ml were 90.2–107.8% with interassay coefficients of variation of 2.1–22.3%. The limit of detection was estimated as 0.10 μg/ml and the limit of quantification calculated to be 0.24 pg/ml in a 1 ml plasma sample. This method was used to establish the pharmacokinetics following intravenous (i.v.), intramuscular (i.m.) and oral (p.o.) administration to calves of oxindanac at a dose rate of 2 mg/kg. The elimination t ¹/₂, was long ( t 1/2 21.2 h after i.v. injection) and absorption was rapid (t¹/_2B 0.072 h) and complete ( F > 100%) following i.m. administration. Bioavailability was incomplete ( F = 66.6%) following p.o. administration to calves that had been fed on milk, and Wagner-Nelson analysis revealed twoabsorption phases ( t ¹/₂'s 0.20 and 1.9 h). Oxindanac produced long-lasting inhibition of serum TxB₂ production, with mean k_max values (% inhibition) of 96.8, 94.1 and 81.3 following i.v., i.m. and p.0. administration, respectively. A single i.v. or i.m. injection of 2 mg/kg oxindanac will probably be active in calves for at least 36–48 h.     

江西阳际峰自然保护区土壤的微生物学性状

研究阳际峰自然保护区不同海拔梯度土壤剖面状况及其微生物学性状,探讨土壤微生物量C与N、酶活性、微生物商与呼吸速率的变化及其相互关系。结果发现,不同海拔梯度土壤在微生物学性状上均有较大差异。总的趋势是植被覆盖度高,地形平缓,土层厚,微生物活性强,且与海拔梯度呈显著正相关。在剖面分布上,也有明显的层次差异,即随土层的增加而减少。     

A scientifically based profession?

For the veterinary profession to be truly science based all of its members need to be engaged, says Lance Lanyon.     

Synovial tumours in dogs

The morphological characteristics, breed predispositions, site predilections and behaviour of three of the most common types of synovial tumours were discussed. Synovial histiocytic sarcoma represents 50% of synovial tumours, occurring in breeds predisposed to histiocytic sarcoma, and has a poor prognosis. Their histological appearance is similar to histiocytic sarcomas occurring elsewhere. The stifle is the most common site; dogs with ruptured cranial cruciate ligament are predisposed. Synovial cell sarcoma represents 15% of synovial tumours in dogs. They have non-specific spindle cell morphology, and can only be distinguished using cytokeratin immunohistochemistry, which will label a small percentage of the spindle cells. Amputation is often curative, but metastases can occur. Synovial myxoma represents 20% of synovial tumours in dogs. They have a characteristic morphology of myxomatous nodules filling the joint cavity and sometimes extending into the surrounding tissues, including bone. Labrador Retrievers and Doberman Pinschers are predisposed, and the stifle and digit are the most common sites. Prognosis is good; even with incomplete excision some dogs survive years without progression or metastasis. Histopathological examination of synovial tumours is essential to determine the course of treatment, and prognosis.