马尾松3种重要害虫的防治

采用化学和物理方法防治马尾松3种重要害虫(松梢螟、松实小卷蛾、油松小卷蛾).结果表明,用氧化乐果与杀灭菊酯交替防治幼虫,结合灯光诱杀成虫,可有效控制3种害虫的危害.     

Studies on the physiological behavior of Pinus merkusii Jungh. and Pinus massoniana Lamb

In rats, an intrarenal injection of nickel subsulfide (Ni3S2) regularly caused, within 2 months, an erythrocytosis and eventually a renal carcinoma in 40 per cent of the animals. Despite their great pleomorphism, the neoplastic renal cells appeared to be of the same lineage but showed a pronounced tendency to evolve toward an anaplastic, spindle-cell variant. By electron microscopy, they exhibited varying degrees of differentiation with surface specialization, suggesting an epithelial origin. There was no indication that the erythrogenic and carcinogenic responses to Ni3S2 were interrelated as the high hemoglobin and erythrocyte values tended to retrocede with the development of the renal carcinoma. Other nickel salts and a variety of divalent metallic preparations failed to produce similar changes when administered under identical conditions. The possible mechanism of NI3S2 at the cellular level is briefly discussed.     

计算机视觉技术在农作物病虫草害防治中的研究进展

综述了国内外计算机视觉技术在农作物病虫草害方面的应用进展,分析了计算机视觉技术在农作物病虫草害自动识别与诊断中的应用前景,提出了目前在实际应用中存在的问题及改进方向.     

工程设计中集散控制系统（DCS）的选型

介绍了DCS的发展阶段和总体评价,对CPU功能、操作站功能、通信网络功能等进行评价,指出DCS的选型应注重其经济性、技术服务,了解DCS的应用实绩,在商务谈判中应把握主动权。     

Appropriate Blood Pressure Control in NIDDM (ABCD) Trial

The ABCD (Appropriate Blood Pressure Control in Diabetes) Trial is a large, prospective, randomized clinical trial of 950 patients with non-insulin-dependent diabetes mellitus (NIDDM) designed to compare the effects of intensive blood pressure control with moderate control on the prevention and progression of diabetic nephropathy, retinopathy, cardiovascular disease, and neuropathy in NIDDM. The secondary objective is to determine equivalency of the effects of a calcium channel blocker (nisoldipine) and an angiotensin-converting-enzyme inhibitor (enalapril) as a first-line antihypertensive agent in the prevention and/or progression of these diabetic vascular complications. The study consists of two study populations aged 40-74 years, 470 hypertensive patients (diastolic blood pressure of > or = 90.0 mmHg at time of randomization) and 480 normotensive patients (diastolic blood pressure of 80.0 mmHg at time of randomization). The study duration is 5 years and is scheduled to end in May of 1998. Patients are randomized to receive either intensive antihypertensive drug therapy or moderate antihypertensive drug therapy. Patients are also randomized to nisoldipine or enalapril, with open-label medications added if further blood pressure control is necessary. The primary outcome measure is glomerular filtration rate as assessed by 24-h creatinine clearance. Secondary outcome measures are urinary albumin excretion, left ventricular hypertrophy, retinopathy, and neuropathy. Cardiovascular morbidity and mortality will also be evaluated. Given the data showing the impact of hypertension on complications in NIDDM, the ABCD Trial is designed to determine if intensive antihypertensive therapy will be more efficacious than moderate antihypertensive therapy on the outcome of diabetic complications in NIDDM.     

SWRH82B钢中w(N)的控制

分析了武钢一炼钢厂SWRH82B生产过程中导致钢水增氮的各种因素，介绍了相应的控制措施及效果。