木霉菌可湿性粉剂对番茄枯萎病防治效果探究

为了评价木霉菌可湿性粉剂对番茄枯萎病的防治效果，进行了木霉菌可湿性粉剂（2×10⁸ cfu/g）防治番茄枯萎病的田间试验。结果表明，木霉菌可湿性粉剂用量为15 000 g/hm²时，药后90 d，对番茄枯萎病的防效可以保持在70%以上。因此，木霉菌可湿性粉剂对番茄枯萎病具有较好的防治效果，与对照药剂防效相当，可以用来防治番茄枯萎病，并具有明显的促生长作用。     

基于RS/GIS的管道建设工程路线方案确定方法研究

从环境保护的角度出发,提出了运用RS/GIS技术确定管道工程建设项目最优环境路线的方法.该方法从社会、生态、水和噪声4个方面考虑管道工程建设项目对环境的影响,通过Delphi法和层次分析法确定各评价指标的权重,根据评价指标环境敏感度大小对评价区域划分敏感等级,依据Bellman最优化原理,用最短距离确定环境最优路线,并...     

超声协同纳米TiO_2光催化降解活性染科的初步研究

将超声氧化与多相光催化技术相结合并且用于活性染料的降解，实验发现超声增强光催化技术可以有效降解该活性染料，而且在超声增强光催化体系中存在较强的协同催化降解作用，     

四棱豆的良种选育研究

以常规栽培种K0014为对照，对选出的4个四棱豆良种进行了主要生物学特性记载和产量分析。结果表明：该4个良种均适合南充地区栽培，其中K009和K0010具高产，抗病特性；96-13具早熟，高产，抗病特性；96-14-1具矮生直立，抗病特性。     

配位不饱和铁邻菲啉(2,2′-联吡啶)配合物对烷基苯的催化氧化

以铁 邻菲啉及铁 2 ,2′ 联吡啶配合物为催化剂 ,常压氧气为氧化剂 ,在 110℃对乙基苯、正丙苯、正丁苯及对二甲苯等烷基苯进行氧化 ,得到了相应的酮和醇 ;讨论了温度、底物与催化剂物质的量之比及烷基苯侧链对催化剂催化性能的影响 .     

A new species of Cerchysiella (Hymenoptera: Encyrtidae) parasitic in larva of chestnut trunk borer (Coleoptera: Cerambycidae) from China with notes on its biology

A new species of Cerchysiella Girault (Hymenoptera: Chalcidoidea, Encyrtidae), Cerchysiella raddeii Yang, sp. nov., is described from China. It is a gregarious koinobiont endoparasitoid in mature larvae of the chestnut trunk borer, Massicus raddei (Blessig) (Coleoptera: Cerambycidae), a serious pest which causes severe damage to many oak tree species, particularly Quercus mongolica and Quercus liaotungensis (Fagaceae) in forested areas of northeastern China. The new species is one of the principal natural enemies of the wood borer and it has high potential as a biological control agent with parasitism rates of 6.7%, large numbers of adult wasps were reared from a single host larva (average 1083.8), and there is a high female : male sex ratio (9.67 : 1).     

杨桃鸟羽蛾的形态特征与生物学特性

杨桃鸟羽蛾(Diacrotricha fasciola Zeller)属鳞翅目(Lepidopter)羽蛾科(Pterophoridae),以幼虫取食嫩梢叶片造成叶片孔洞或缺刻、或在花期同时蛀食为害花蕾造成落花和花穗枯死,对杨桃生产造成严重影响.本文通过田间调查和室内饲养观察,阐述了鸟羽蛾的形态特征、生物学特性；通过系统调查,探明了杨桃鸟羽蛾的为害率和自然种群动态.     

H_3PMo_(12)O_(40)掺杂氧化制备聚吡啶及其表征

采用杂多酸H3PMo12O40为氧化剂和掺杂剂,化学氧化法制备掺杂态聚吡啶.用红外光谱、扫描电镜等手段表征产物的结构和微观形貌,并研究掺杂态聚吡啶的循环伏安特性和热稳定性.结果表明,制备的掺杂态聚吡啶形貌为0.1～0.6 μm的不规则颗粒,能表现出杂多酸和掺杂态聚吡啶的电化学行为,并具有一定的热稳定性,聚吡啶在511 ℃以上分解失重.     

Protein oxidation and 20S proteasome-dependent proteolysis in mammalian cells

The generation of reactive oxygen species is an inevitable aspect of aerobic life. In addition to being exposed to free radicals in the environment, aerobic organisms must also deal with oxygen radicals generated as byproducts of a number of physiological mechanisms - for example, by the mitochondrial and endoplasmic reticulum electron transport chains, and by cells of the immune system. Although most organisms are equipped with several lines of defense against oxidative stress, these defensive mechanisms are not 100% effective, and oxidatively modified forms of proteins accumulate during aging, and in many pathological conditions.?Oxidatively modified proteins can form large aggregates due to covalent cross-linking or increased surface hydrophobicity. Unless repaired or removed from cells, these oxidized proteins are often toxic and can threaten cell viability. Mammalian cells exhibit only limited direct repair mechanisms, and oxidatively damaged proteins appear to undergo selective proteolysis, primarily by the major cytosolic proteinase, the proteasome. Interestingly, it appears that the 20S 'core' proteasome conducts the recognition and elimination of oxidized proteins in an ATP-independent and ubiquitin-independent pathway. Received 31 May 2001; accepted 26 June 2001     

栗链蚧生物学特性和防治研究

栗链蚧在湖北孝感1年发生2代，以受精雌成虫在树干、枝条上越冬。叶期间使用石硫合剂、花保、松脂剂防效很好。在卵的盛孵期使用甲胺磷等内吸剂，也能达到满意的效果。