Detection and analyses of coagulation and fibrolysis factor mRNA levels in tissue of hepatocellular carcinoma patients

AIM:To detect the mRNA expression of tissue factor (TF), urokinase-type plasminogen activator (u-PA) and urokinase-type plasminogen activator receptor (u-PAR) in the samples of hepatocellular carcinoma (HCC) and adjacent tissue, and to elucidate their association with clinical significance. METHODS:The mRNA levels of TF, u-PA and u-PAR in 27 human HCC tissue samples with their adjacent tissue samples and 27 normal liver tissues were detected by RT-PCR. The relationship between the mRNA expression and their clinic-pathological data were also analyzed. RESULTS:The expressive rate of TF, uPA and uPAR in HCC tissue samples was 62.96% (17/27), 70.37% (19/27), 77.78% (21/27), respectively and relative expression intensity of TF, uPA and uPAR were 0.567±0.268, 0.964±0.458 and 0.784±0.322, respectively, which were significantly higher than those in adjacent tissue group and normal liver group (P<0.05). TF, uPA and uPAR mRNA levels were all significantly higher in larger size and in the invasive and metastatic subgroup (P<0.05). There had positive relationship between the mRNA expressions of these three factors. CONCLUSION:The results indicate that TF, uPA and uPAR might play an important role in hepatic carcinogenesis, invasiveness and metastasis.     

广西玉米纹枯病菌培养性状及其致病力研究

从广西玉米主产区的8个县市秋玉米的纹枯病病株中分离出8个玉米纹枯病菌株,经生物性状的观察和菌丝融合群测定表明,它们都属于立枯丝核菌AGk-1-IA融合群;腐生定殖能力和致病力测定表明,菌株GX4、GX1的腐生定殖能力和致病力最强。     

花生幼苗不同切断及其愈伤组织的农杆菌介导转化

试验进行了不同花生外植体（成熟胚的幼叶、胚轴、子叶等）的直接农杆菌转化与花生愈伤组织的农杆菌转化,比较其感染后的诱芽与上分化生长情况,并对影响农杆菌介导转化花生的因素进行了探讨.结果表明农杆菌的生长状况、浓度及侵染时间和筛选剂的浓度是影响农杆菌介导花生转化的主要因素;褐化是影响其转化的关键问题.     

Towards identifying pathogenic determinants of the chickpea pathogen <Emphasis Type="Italic">Ascochyta rabiei</Emphasis>

Ascochyta blight is a serious disease of cool-season grain legumes (chickpea, faba bean, lentil and pea) caused by fungal species of the anamorphic genus Ascochyta and related genera. Despite extensive studies on the biology, ecology, epidemiology and management of the disease, little is known about the pathogenic determinants of these pathogens. This research aims at using Ascochyta rabiei as a model for the genus in investigating genetic factors of pathogenicity, with the ultimate goal of elucidating pathogenic mechanisms. Three advances were made: (1) insertional mutants with altered pathogenicity were identified through in vivo screening, and genomic regions adjacent to the insertion sites in selected mutants were determined; (2) a phage library of A. rabiei genomic DNA was constructed, and the library was estimated to provide complete coverage of the A. rabiei genome. This library was used successfully to recover clones with DNA adjacent to insertional mutation sites and to isolate specific genes; (3) DNA probes specific for an acyl-CoA ligase (cps1) and a polyketide synthase gene (pks1) were developed and library clones containing the corresponding genomic regions were identified from the phage library. These advances provide the foundation and necessary tools for experimentation of ectopic complementation assays and targeted mutagenesis to elucidate the genetic mechanisms of pathogenicity of A. rabiei.     

遮光对青榨械光合速率及叶绿素荧光参数的影响

研究了遮光15％、35％、50％和全光照处理对青榨槭新梢生长、叶片色素含量、净光合速率以及叶绿素荧光参数的影响。结果表明，随着遮光度增加，叶片色素含量增加，叶绿素a／b减小；叶片净光合速率（Pn）、初始荧光（Fo）、原初光能转化效率（Fv／Fm）和光化学猝灭系数（qP）增加，但非光化学猝灭系数（qN）降低。全光照和遮光15％处理条件下，Pn日变化呈双峰曲线，而35％和50％处理条件下呈单峰曲线；遮光35％和50％处理条件下Fv／Fm日变化幅度较小，15％和全光照处理条件下Fv／Fm日变化呈先上升后下降再上升趋势。50％遮光处理青榨槭幼苗Pn最高，新梢年生长量最大，可在育苗生产中应用。     

罗布泊南部野双峰驼的分布与环境

在１９９５－１９９６年两年调查的基础上,我们又利用家驼队深入荒漠腹地,考察了罗布泊南部野双峰驼的分布和栖息环境,结果表明在罗布泊南部的湖岸区,阿尔金山北麓及山前丘陵地带均有野驼分布,库姆塔沙漠中部无野驼进入,但其西侧戈壁及丘间谷地为野驼南北迁徒的通道,冬季野驼主要集中活动在科什兰孜等罗布泊南岸及阿奇克谷地;夏季主要在山区北麓活动,所以应将该区域与上述分布区同归于一个分布区整体,即南北配置的景观复合     

氟罗沙星对禽败血霉形体（Mycoplasma gallisepticum）病的药效研究

体外抑菌试验测得氟罗沙星（Ｆｌｅｒｏｘａｃｉｎ）对禽败血霉形体（Ｍｙｃｏｐｌａｓｍａｇａｌｉｓｅｐｔｉｃｕｍ）的最小抑菌浓度（ＭＩＣ）为０．０１５ｍｇ／Ｌ。体内药效试验表明,氟罗沙星以２５、５０、１００ｍｇ／Ｌ饮水给药和以５、１０、１５ｍｇ／ｋｇ肌注给药（１次／ｄ）,连续用药５ｄ,对人工气囊接种禽败血霉形体培养液（０．２ｍＬ,约含１０８ｃｆｕ）的雏鸡,保护率均为１００％（３０／３０）,而感染不给药组雏鸡存活率为９３．３％（２８／３０）;相对增重率分别为９０．８％、９１．５％、９２．３％和９１．５％、９１．８％、９２．９％,显著高于感染不给药组（７３．２％）;气囊损伤分分别为２．９３、２．６２、０．９３和１．８、１．１、１．０,而感染不给药组为６．５７,差异显著（Ｐ＜０．０５）;血清玻板凝集试验阳性率分别为２０％（２／１０）、１０％（１／１０）、０（０／１０）和３０％（３／１０）、１０％（１／１０）、１０％（１／１０）,均极显著低于感染不给药组１００％（１０／１０）（Ｐ＜０．０１）。氟罗沙星不同给药途径及不同剂量间药效差异不显著。     

乡土观赏竹在重庆北碚城市景区中的应用

重庆北碚乡土竹类植物共有11属51种,其中35种已在园林中得到应用。该文分析了各竹种的观赏特性及应用前景,对竹子在北碚区城市景区中的应用进行了探讨,为市区丰富园林绿化树种,增添园林景观,为类似城市旅游景区提供一定的参考。