西藏地区需水量预测分析

通过对西藏水资源的现状分析,摸清了西藏水资源的基本状况。根据西藏地区过去分行业的用水情况及未来社会经济发展的预测,分析了西藏地区需水量预测的影响因素,应用灰色系统理论建立西藏地区需水预测模型,对西藏自治区2010年和2020年需水进行了预测分析,有助于西藏地区采取合理的用水规划措施,减少成本开支,促进西藏经济社会的可持续发展。2010～2020年,随着经济发展逐步进入稳定时期,社会总体科技水平将有较大发展,节水政策、节水技术和设施得到较好的实施,全社会用水水平也逐渐趋于平稳,年需水增长速度减缓,并逐步达到基本平稳,平均年递增率为1.5％。     

黄水沟水文站月水量预报方案的编制

黄水沟位于新疆巴音郭楞蒙古自治州和静县境内,发源于中天山的天格尔山南坡,是一条雨雪混合补给性河流。黄水沟水文站(位于山口处)以上集水面积4311km2,流域面上的降水经过10余条一级支流、10余条二级支流及若干条三级支流的汇集调蓄,自北向南汇集于山口。山口以上河段至今没有修建控制型水利工程。利用黄水沟站49年的水文资料,运用数理统计方法,分析月水量要素自身的统计规律或月水量要素与其他有关因子之间的统计关系,进行黄水沟月水量的预报方案编制,提高未来可能来水量的预报精度,为当地防洪抗旱、水量调度与管理部门在进行河流(流域)水资源统一规划与可持续利用时提供比较准确的未来可能来水量预报。     

基于序关系法的建筑企业技术创新风险灰色聚类评价

目前我国建筑行业竞争激烈,技术创新作为提高建筑企业核心竞争力和可持续发展能力的重要渠道,得到越来越多企业的重视。针对建筑企业技术创新风险影响因素不确定和风险环境复杂的特点,建立了建筑企业技术创新风险的评价指标体系。选用序关系法对指标赋权,结合灰色聚类法进行评价分析,得到建筑企业的技术创新风险值。并通过实证研究证明其有效性,为建筑企业技术创新管理提供良好的指导。     

Beta-glucuronidase in human mammary carcinomas

The result of prompt squatting is an increase of the venous return and of the arterial resistance. Consequences are increasing of the end-diastolic and systolic chamber pressure, stroke volume, average arterial blood pressure as well as decreasing of the frequency of the pulse controlled by baro-receptors. The regulatory mechanism both change the intensity of heart murmurs of various cardiopathies and of functional heart murmurs in children. Only the systolic murmur of muscular subvalvular aortic stenosis softens. The experiment is most valuable for the recognition of mild insufficiency of semilunar valves.     

Electrocardiographic abnormalities in hypothyroidism before and after exercise

Eleven men and 50 women with severe hypothyroidism were studied. All patients had a serum PBI less than 3.0 mug/100 ml, 131I 24 hours uptake less than 13% and a a photomotogram contraction and half relaxation time of 380 msec or more. Before exercise the mean +/- SE heart rate was 68.39 +/- 3.26/min, the PR interval 17.08 +/- 0.37 csec, the QRS voltage (sum of the QRS amplitude in leads I, II and III) 16.44 +/- 0.89 mm (10mm = 1.0 mV) and the T wave amplitude 0.06 +/- 0.15 mm. A significant correlation (p less than 0.05) existed between the PBI values and the QRS voltage. Following exercise there was a significant acceleration of the heart rate (+ 23.39/min, p less than 0.001), shortening of the PR interval (-0.66 csec, p less than 0.02) and T wave elevation (+ 0.40 mm, p less than 0.001). ST segment changes were not observed in any case. Replacement treatment in 7 cases resulted in a significant change in the resting heart rate (+ 11.86/min. p less than 0.025), PR interval (-3.28 mm, p less than 0.025) and T wave height (+ 2.50 mm, p less than 0.01). These findings suggest that exercise may be used in the differentiation between hypothyroidism and coronary heart disease. The theoretical importance of these findings is also discussed. An increase in cardiac energy demands during exercise may be the cause for some of the ECG changes observed on exertion.     

Therapeutic comparison of thiol compounds in severe paracetamol poisoning

Twelve patients with toxic blood concentrations of paracetamol were treated with either cysteamine or amino-acid solution. None of the patients developed severe liver damage, although transient mild biochemical abnormalities developed in three. None of the patients treated with amino-acid solution had side effects due to therapy, whereas all those treated with cysteamine did. It is recommended that amino-acid solutions be used as a temporary measure in patients suspected of massive paracetamol overdose while awaiting estimation of blood paracetamol concentration.     

Further characterization of the complementation group B temperature-sensitive mutant of respiratory syncytial virus

ts-2, a temperature-sensitive and plaque morphology mutant of respiratory syncytial virus and sole representative of complementation group B, was compared with members of the other complementation groups of respiratory syncytial virus (group A [ts-1] and group C [ts-7]). ts-2 was found to be 10- to 1,000-fold more restricted in growth and ability to spread at restrictive temperatures (37, 38, and 39 degrees C) than at the permissive temperature (32 degrees C). In temperature shift-up experiments, the ts defect of ts-1 and other members of complementation group A was found to effect a late function that was required for at least 13 h in the replicative cycle. The ts lesion of ts-7 affected a function early in the replication cycle. In contrast, ts-2 was not temperature sensitive when studied by the shift-up technique. The discrepancy between the ts plaque property and failure to detect temperature sensitivity during the shift-up experiment was resolved when it was shown that ts-2 had a defect in adsorption or penetration or both at the restrictive temperature. Clonal analysis of revertant ts-2 showed a coordinate restoration of ts+ phenotype ans syncytium-forming capacity. It appears that ts-2 has a defect in a protein that is involved in adsorption and/or penetration of virus and is also responsible for cell fusion activity.     

Immunity to Trichinella spiralis. VII. Resistance stimulated by the parenteral stages of the infection

In three experiments mice were given three intravenous injections of Trichinella spiralis newborn larvae produced in vitro. Following a challenge infection of newborn larvae the mice were shown to be on the average 85% resistant i.e., only 15% of the challenge larvae developed to encysted muscle stage larvae in these mice; when the challenge consisted of normal muscle larvae administered per os, the mice were 51% resistant. Neither the number nor longevity of adult worms in the intestines was affected by this immunization procedure.     

Antibiotic resistance patterns of metal-tolerant bacteria isolated from an estuary

Estuarine bacteria isolated on metal-containing media were also found to be antibiotic resistant; ampicillin and chloramphenicol were the antibiotics to which resistance was most common. Patterns of antibiotic resistance were found associated with a variety of taxa.