凹土对涂料性能的影响研究

以凹土代替部分二氧化钛制备涂料,通过改变凹土的用量测定涂料的性能变化情况,并对凹土进行超细粉碎处理前后对涂料性能的影响进行对比。凹土替代二氧化钛,不但可以改善涂料的某些性能,还可以降低涂料成本,但用量不宜太多,与适量的碳酸钙混合使用效果更好。相同的代替量,超细凹土优于原粉凹土。     

Influence of radiation intensity upon photo-oxidation of unstabilised PVC

Films of unstabilised PVC have been exposed to xenon-arc irradiation at various levels of intensity within a limited temperature range, and the rates of photo-oxidation have been determined by infra-red spectroscopy. It has been found that the rate of reaction is directly proportional to radiation intensity measured in absolute units, and that transposition of time and radiation intensity is valid. The consequences of this finding have been discussed in terms of reaction mechanism and acceleration of the time scale for oxidation of PVC under artificial exposures to the xenon-arc, compared with outdoors exposure to solar radiation at Melbourne and London.     

敏化方式对乳化炸药压力减敏作用的影响

对3种方式敏化的乳化炸药动压作用下的减敏作用进行了研究.用测量系统捕捉该3种乳化炸药发生压力减敏作用前后水中爆炸冲击波,利用冲击波参数计算炸药的压力减敏作用程度,该值反应了压力减敏作用的大小,依据该值分析了敏化方式对压力减敏作用的影响.结果表明,敏化方式对乳化炸药动压下的减敏作用影响很大,该实验条件下分别用膨胀珍珠岩、空心玻璃微球、化学气泡敏化的乳化炸药,压力减敏作用依次减少.     

外商直接投资对我国就业的效应分析

分析了在不同的经济发展阶段外商直接投资对我国就业的影响程度,以及我国外商直接投资的产业结构情况及其对就业的影响.建议继续大力吸引外商直接投资,并通过优惠政策主要吸引外资到第三产业,以缓解我国的就业压力.     

柴油抗磨剂对柴油质量影响分析

随着国Ⅳ、国Ⅴ车用柴油标准的实施,柴油抗磨剂的使用范围不断扩大。不同抗磨剂由于其组成、性质等差异,影响商品柴油质量、使用性能,并出现乳化、酸值偏高、氧化安定性(以总不溶物计)超标问题等,已严重威胁车用柴油质量的稳定。本文介绍了抗磨剂的质量要求,分析了酸/酯型抗磨剂生产工艺、性能特点以及与其他添加剂配伍性等对柴油性能质量的影响,有助于企业合理选择、使用柴油抗磨剂并有效解决加剂柴油的质量问题。     

RINs简介及对炼油商的影响

2013年后RINs交易价格突然大幅上扬,成为业内关注的焦点问题。本文描述了可再生燃料标识码RINs的概念、形成和交易过程,RFS法规对生物燃料调合目标量的要求,并分析了RINs价格大幅上涨的原因及对炼油商的影响。     

Influence of the olfactory sense upon smolt transformation in salmonid fishes

The effect of olfactory deprivation on the process of smolt transformation in Atlantic salmon (Salmo salar L.) was investigated. Salmon parr were rendered anosmic by heat-cauterizing in November, and, together with controls, size, purine deposition (silvering), and mortality were monitored throughout spring in individuals within sibling groups. In May the fish were exposed to seawater (3.2% salinity) to determine levels of smoking in anosmic fish compared with control fish. Olfactory deprivation was found to induce a negative effect on survival in both anosmic fish as well as controls when reared within the same rearing tank. A 54% survival was metered in anosmic fish as opposed to only 26% survival in control fish during the experimental period. The low survival rates observed are suggested to result from abnormal behavior in anosmic fish due to lack of proper olfactory stimuli. Within each strain, the anosmic fish were found shorter and displayed less-silvering than their control fish at the end of the experimental period. Further, since control fish could withstand salinity exposure longer than anosmic fish, smolting is suggested to have been retarded among the anosmic fish. Olfactory influence on smolt transformation may be caused by conspecific pheromones secreted for the purpose of mediating effects of life-history patterns in salmonid fishes.     

中东石化工业发展对中国市场的影响

介绍了中东地区石化工业的发展历程,分析了中东地区石化产品出口贸易情况、主要石化产品的生产成本,以及中东石化产品出口对我国市场的影响。     

日本大地震对石油石化产业的影响

介绍了2011年日本地震灾区炼油石化装置关停情况,分析了其对世界石油石化产业的影响.     

金融危机对石油石化业的影响及应对策略

分析了金融危机对世界经济以及世界和中国石油石化业的影响，并提出了应对策略。     

油价对非常规和替代石油发展的影响

介绍了近年来国际油价高涨引发的人们对非常规和替代石油的乐观期待,指出高油价推动的资源价格全面上涨增大了开发非常规和替代石油的风险,而油价的周期性变化将对发展非常规和替代石油带来巨大的经济风险。     

中国-东盟自贸区对中国石化产业的影响

在简要介绍世界和中国自贸区发展状况的基础上,重点分析研究了即将于2010年建成的中国-东盟自贸区对中国石化产业的影响,建议中国石化产业在充分利用自贸区带来的有利条件和机遇的同时,要注意利用相关贸易救济机制加强对国内石化产业的保护,使其免受进口石化产品的严重冲击.)     

液化成本上涨对我国LNG产业发展的影响

介绍了国际液化天然气（LNG）市场的变化情况和诱因,分析了液化成本上涨的原因,液化项目成本的未来走势及液化项目成本上涨对LNG行业的影响。指出面对新的市场环境,我国LNG产业应及时调整策略,同时政府应给予相应的政策支持,以促进LNG产业健康发展。     

俄罗斯资源国有化政策及其对油气产业的影响

本文就俄罗斯资源国有化政策对油气产业的影响以及俄罗斯能源行业未来的发展等问题进行了讨论。     

Influence of cholesterol feeding and dietary restriction on cholesterol absorption in rabbits

Plasma cholesterol and cholesterol absorption were measured in rabbits given either a standard or cholesterol-rich diet which were fed either ad libitum or reduced to 50% of the control ration. The results confirmed the aggravating effect of dietary restriction on the plama cholesterol response to cholesterol feeding. Hypercholesterolemia was doubled when cholesterol feeding was associated with reduced dietary intake. The percentage of cholesterol absorbed increased significantly in cholesterolfed rabbits on normal caloric ration, while dietary restriction had no effect on this parameter either with the standard or the cholesterol-rich diet. These data indicate that the mechanisms by which plasma cholesterol increases in response to cholesterol feeding involve increased cholesterol absorption. Nevertheless the aggravating effect of dietary restriction cannot be attributed to increased cholesterol absorption.