金矿化地质地球化学特征

作者发现金矿（化）点２０余处，包括４个类型：（１）受花岗岩中相关剪切带控制的黄铁绢英岩金矿；（２）多金属硫化物石英型脉型金银矿；（３）陆相含炭岩系沉积改造层控金矿；（４）陆相砾岩金矿。（１）、（３）两种类型金矿具工业规模。黄铁绢英岩金矿主要赋存在以胶东群为交代基体的重熔花岗岩或交代花岗岩的构造蚀变带中心。这类构造蚀变带是遭受长期构造应力作用并叠加后期构造破裂经热液蚀变形成的。成矿热液为中温碱性溶液，金多呈金氯络合物形式被活化搬运。该类型金矿与强绢英岩化蚀变关系密切，在韧性剪切带基础上发育的蚀变糜棱岩化花岗岩带上等间距成群出现。陆相含炭岩系沉积改造层控金矿，为缓倾斜层状、似层状、透镜状矿体，受下白垩统莱阳群一段上、下含炭岩系控制。金矿在上、下含炭岩系中多层出现。此类矿床为晚元古代胶北地体隆起为陆，风化剥蚀产物沉积在中生代断陷盆地陆相湖泊基底堆积物中，由于盆地底部丰富的有机质及粘土对古风化产物中分解的自然金的富集作用形成了富金矿源层，ＡＵ：１４－８００ｐｐｂ。在燕山晚期强烈构造变动影响下，成矿热液活动，有机炭在矿床改造过程中进一步富金作用，形成工业矿床。这是一新类型金矿。     

找矿标志研究

作了综合物探研究，包括１／２０万重力和航磁，１／２．５万航磁、航放和航电。航片及卫片解释。重要矿化地段的地面物探研究。水系沉积物化探异常研究及岩石地球化学研究。数学地质（聚类分析、因子分析和四归分析）研究。对各类金矿的找矿标志进行研究并确定了找矿准则。     

QDTA／T／EGD／GC在线联用技术X．菱铁矿、高岭石、白云石、方解石、石英五元混合矿物的组成分析

应用已建立的ＤＴＡ／Ｔ／ＥＧＤ／ＧＣ在线联用技术及其装置，在ＣＯ＿２和空气下鉴定了白云石中的微量菱铁矿；在空气下测定了方解石的纯度；在Ｎ＿２气下对配合的菱铁矿、高岭石、白云石、方解石、石英五元混合矿物的组成进行了分析。实验结果表明：白云石／方解石（１：１）的混合矿在ＣＯ＿２下两者热分解释放出ＣＯ＿２的三个吸热效应，在ＤＴＡ曲线上皆可显示其对应的峰形特征而得到判别。     

Two virus-encoded RNA silencing suppressors, P14 of Beet necrotic yellow vein virus and S6 of Rice black streak dwarf virus

Functional analysis for gene silencing suppressor of P14 gene of Beet necrotic yellow vein virus and S6 gene of Rice black streak dwarf virus was carried out by agro- infiltration with recombinant vectors of Potato virus X. The phenotype observation of green fluorescent protein (GFP)expression and Northern blot showed that the gene silencing of gfp transgenic Nicotiana benthamiana induced by homologous sequence was strongly suppressed by the immixture infiltration of either the P14 or the $6. In the suppressed plants, the gfp mRNA accumulation was higher than that in the non-suppressed controls and the symptoms caused by PVX infection became more severe, especially the gfp DNA methylation of plant genome was significantly inhabited when co-infiltrated with RBSDV S6 gene. These results suggested that these two virus genes were potentially to encode for proteins as RNA silencing suppressors.     

手背静脉识别系统的研究

介绍了手背静脉识别系统的图像处理和相关法识别算法,并通过实验证明了系统的可行性。     

运用张性纤维状岩脉计算拉伸量的原理和方法

该文讨论了张性纤维状岩脉的地质特征、拉伸方向的确定以及拉伸量的计算原理和方法,从而获得武当山推覆构造推覆期后伸展变形的拉伸量为9.1%。     

水压支柱支护特性及其在深井开采中的应用

研究了水压支柱的工作原理、支柱的阻力特性曲线以及水压支柱的等效刚度和阻力增量等参数,并确定了工作面顶板下沉量与支柱初撑力、支柱阻力增量之间的相互关系,求出了水压支柱的最小初撑力、额定初撑力和额定支柱工作阻力等参数的计算方法;此外,还对水压支柱的让压性能及其在湘西金矿深井缓倾斜复杂薄矿脉开采工艺技术中的应用进行了分析.得出:湘西金矿深部试验采区水压支柱的额定初撑力为162kN,额定工作阻力为200kN,合理支护网度为2.0m×2.0m;水压支柱在湘西金矿的使用,改善了采空区顶板的受力条件,为落矿、运搬及充填工作提供了良好的作业环境,为缓倾斜薄矿脉强化开采提供了可靠的安全保障.     

Structure and morphogenesis of bacteriophage T4

Bacteriophage T4 is one of the most complex viruses. More than 40 different proteins form the mature virion, which consists of a protein shell encapsidating a 172-kbp double-stranded genomic DNA, a tail, and fibers, attached to the distal end of the tail. The fibers and the tail carry the host cell recognition sensors and are required for attachment of the phage to the cell surface. The tail also serves as a channel for delivery of the phage DNA from the head into the host cell cytoplasm. The tail is attached to the unique portal vertex of the head through which the phage DNA is packaged during head assembly. Similar to other phages, and also herpes viruses, the unique vertex is occupied by a dodecameric portal protein, which is involved in DNA packaging.Received 18 February 2003; received after revision 16 April 2003; accepted 9 May 2003     

超声诊断下肢深静脉血栓形成116例观察

目的：探讨超声在下肢深静脉血栓形成中的应用价值.方法：通过超声对116例下肢静脉血栓病人的诊断和疗效观察进行分析和探讨.结果：116例病人经抗凝、溶栓治疗一周的复查、超声示血栓段静脉管腔缩小血流通畅,血栓再通.结论：超声为下肢静脉血栓形成提供了早期、无创、高敏感的检查方法.     

Characterization of microbe cementitious materials

A new generation of cement, microbe cement, has been developed in response to the ever increasing awareness of environmental protection. Microbe cement is a new strengthening material based on microbiologically induced precipitation of calcium carbonate. This paper confirms the feasibility of binding loose sand particles using microbe cement and details the cementation mechanism of microbe cement. We have also prepared microbe cementitious materials (biosandstones). The compressive strength of the bio-sandstone, which depends on the content of calcium carbonate produced by microbially induced precipitation and the bio-mediated calcite crystal size, could be up to 12 MPa at an age of 20 days. By increasing the precipitated calcite content, the compressive strength and microstructure of bio-sandstone could be improved.