A new benzoquinone-containing antimetastatic product

An orally applicable fermentation product of wheat germ containing 0.04% substituted benzoquinone (MSC) was invented by Hungarian chemists under the trade--name of AVEMAR. The following biological effects of this product were observed. Oral administration (3 g/kg body weight) of MSC enhances blastic transformation of splenic lymphocytes of mice. The same treatment shortens the survival time of skin grafts in co-isogenic mouse skin transplantation model, which points to immune-reconstructive effect of MSC. Highly significant anti-metastatic effect of MSC was observed in three metastasis models (3LL-HH, B16, HCR-25). The antimetastatic activity of MSC--besides the immune reconstitution--may also due to the cell-adhesion inhibitory, cell proliferation inhibitory, apoptosis-enhancing and antioxidant effects, which were also observed in our in vitro experiments. Based on the biological effects of MSC--which is non-toxic, according to subacute toxicology studies--this product may be used as an adjuvant in the therapy of malignant neoplasia and other diseases caused by or following immunedeprivation.     

PAPEMP与西部冷却水处理

报道了上海石化研制和生产的多氨基多醚基亚甲基膦酸（PAPEMP）的一系列优良特性。研究表明，该药剂具有很高的钙容忍度，对碳酸钙、硫酸钙、硅酸盐有很强的阻垢能力，能很好地稳定铁、锌、锰的氧化物。文中结合国家的西部大开发，指出，在我国西部较高浓缩倍数下运行的循环冷却水系统中，必将面对高钙、高碱或高硅的局面，因此，这类药剂将非常适用于我国西部冷却水处理。     

三光纤干涉流量测量技术

简要介绍了生产测井对流量计的要求,分析了各种原理的光纤流量计的优缺点提出靶式光纤干涉流量测量原理测量采油井井下流量的方案。在双光纤干涉流量测量的基础上,详细阐明了三光纤干涉流量计的工作原理,推导了流量计的数学模型,给出了三光纤干涉流量测量系统的设计参数,进行了三光纤干涉流量测量系统的仿真和流量测量实验,给出了实验结果。结果表明,三光纤干涉流量计有着诸多的优点,具有广泛的应用前景。     

基于OpenGL实现真实感地形表现的研究

三维真实感图形是科学可视化、计算机动画、虚拟现实的技术核心,也是时空一体化地理信息系统的关键技术,而OpenGL又是目前最新的三维图形国际标准,为了实现地形的真实感显示,讨论了三维真实感地形表现在OpenGL支持下的地形模型映、遥感影象与地形的融合、专题信息与地形的融合、以及动画与虚拟现实等技术实现方法,并在荆江分洪区洪水演进模拟系统等开发中得到应用。     

基于光谱匹配滤波的蚀变信息提取

从遥感图象中提取出围岩蚀变信息，一直是资源遥感应用与评价的重点与难点．在光谱一空间匹配滤波的基础上，发展了基于光谱匹配的蚀变信息提取方法．该方法在0-均值空间，以标准光谱数据库中的矿物光谱为参考光谱矢量，根据图象像元与参考光谱矢量的匹配程度，建立滤波检测器，从光谱匹配的角度进行滤波以及合理的阈值化处理，分割出蚀变信息．以新疆东天山某金矿床和西藏冈底斯某铜矿带的ETM^ 数据为例，从图象背景中提取出与各自矿化相关的蚀变信息，部分蚀变组合分布信息与矿床位置吻合，从而反映该方法通用性较好．     

Hip-Arg-Phe-, Hip-Phe-Arg- and Hip-His-Leu-cleaving dipeptidyl carboxypeptidases in human adrenal tumors

Hip-Arg-Phe-, Hip-Phe-Arg- and Hip-His-Leu-cleaving dipeptidyl carboxypeptidase activities were measured in the supernatant (S2) and pellet (P2) fractions obtained by ultracentrifugation of human adrenal tumor preparations. Negligible enzyme activity was found in cortical tumor whereas highly significant activities were present in the P2 fractions of the two pheochromocytoma specimens. The hydrolysis rates, expressed in terms of the percent of added substrate were 58-66%/60 min for Hip-Phe-Arg, 55-58%/60 min for Hip-Arg-Phe and 19-30%/60 min for Hip-His-Leu. The angiotensin-converting enzyme inhibitor, captopril, differentially inhibited the enzyme splitting Hip-His-Leu versus the one cleaving Hip-Arg-Phe; Hip-Phe-Arg is probably the substrate of both. It is concluded that the Hip-Arg-Phe-cleaving enzyme in adrenomedullary tumor is probably identical to the purportedly novel dipeptidyl carboxypeptidase that we detected earlier in rabbit ear artery wall, which converts (Met5)-enkephalin-Arg6,Phe7 to (Met5)-enkephalin.     

光谱遥感岩矿识别基础与技术研究进展

遥感技术的发展与地物光谱特征的研究密不可分。主要从光谱遥感发展与地质应用的趋势出发,从光谱遥感岩矿识别基础与识别技术方法两方面阐述了光谱遥感的研究进展。对于遥感岩矿的识别基础,主要阐述物谱关联和物理模型研究的技术方法与进展以及其对遥感地质应用的促进与深化。在技术方法方面,主要从多光谱与成像光谱两个层次上,分析利用光谱特征进行岩石矿物识别的研究进展及其潜力与可行性。强调了岩石矿物光谱特征在遥感岩矿识别与地质成因信息提取中的重要性。     

协同GIS——COGIS概念初探

论文从分析 GIS发展的角度 ,提出了协作 GIS(Cooperative GIS) ,即协同操作的地理信息系统 ,简称Co GIS.分析了 Co GIS中天、地、人、机关系 ,指出 Co GIS是面向群体用户、支持人人交互的 GIS;讨论了 GIS组通讯问题 ,并指出 Co GIS要体现以人为本的思想 .Co GIS是在计算机支持协同工作 (CSCW)的基础上 ,面向空间问题 ,融合了地理信息、地理数据、GIS操作及应用等方面的复杂性 ,因此 Co GIS不同于一般的 CSCW应用 ,其在军事指挥、应急响应、电子政务、虚拟企业等领域及群体协作的应用中将有很好的发展前景