接种量对泔脚发酵产氢余物甲烷化的强化研究

 以城市生活垃圾厌氧消化污泥为接种物,考察了15％、30％、45％、60％的接种量对泔脚发酵产氢余物中温（36℃）批式厌氧消化的影响。结果表明：泔脚发酵产氢余物的产沼能力随着接种量的增大而增强。结合Gompertz模型拟合结果及理论分析,60%的接种量为泔脚发酵产氢余物沼气化的最佳接种量,其沼气化的延迟时间λ、产甲烷率、生物气中甲烷的最高体积含量分别为：4.37d,388.72mL/g,80.4％。消化结束后,除产沼过程失败的15％接种量以外,厌氧消化余物的pH值在 6.70～7.00之间,这为沼气中甲烷的高体积含量（高于常规厌氧消化的最高甲烷体积含量75%）提供了证据。     

偶应力/应变梯度弹塑性理论有限元实现

引入了偶应力弹塑性理论的增量形式,并提出了一种新的应变梯度理论,该理论引入了两个细观材料长度,结构较为简便.采用RCT9+RT9单元对软化材料的剪切带问题进行分析,该单元无多余零能模式且满足C0-1分片检验,即同时满足C1常曲率分片检验和C0线性应力分片检验.数值结果表明,利用传统弹塑性理论分析剪切带问题会出现显著的网格依赖性现象,而偶应力/应变梯度理论可以有效地避免这一问题,使计算结果收敛,此外,剪切带宽度随细观材料长度的减小而变窄.     

复杂系统的模糊可靠性分析

应用普通可靠性和模糊可靠性的基本理论，建立了复杂系统的模型可靠性数学模型，并以实例具体说明了计算方法.     

Transformation of GbSGT1 gene into banana by an Agrobacterium-mediated approach

SGT1 is a homologue of the yeast ubiquitin ligase-associated protein. It controls some protein degradation and activates defense pathway in plants. Cotton GbSGT1 gene (Gossypium barbadense) has been isolated and characterized in previous work. In this study, the plant expression vector pBSGT1 with bar gene as a selection agent was constructed and transgenic banana was obtained via Agrobacterium-mediated transformation with the assistance of particle bombardment and screened with PCR and Basta spreading on banana plant leaves. Estimating of transgenic banana plants for resistance to Panama wilt is in progress.     

Transformation of GbSGT1 gene into banana by an Agrobacterium-mediated approach

SGT1 is a homologue of the yeast ubiquitin ligase-associated protein. It controls some protein degradation and activates defense pathway in plants. Cotton GbSGT1 gene (Gossypium barbadense) has been isolated and characterized in previous work. In this study, the plant expression vector pBSGT1 with bar gene as a selection agent was constructed and transgenic banana was obtained via Agrobacterium-mediated transformation with the assistance of particle bombardment and screened with PCR and Basta spreading on banana plant leaves. Estimating of transgenic banana plants for resistance to Panama wilt is in progress.     

产学研合作中存在的问题及对策分析

产学研合作是企业、高校和研究结构实现资源优势整合的一种有效途径。但过去几年的实践经验表明,目前的这种合作方式中还存在着诸多问题与不足,并没有达到预期效果。从不同角度对目前产学研合作中存在的主要问题进行了阐述和分析并根据问题实质提出了一些建设性意见。     

超声内镜诊断上消化道黏膜下病变临床价值分析

目的探讨超声内镜(EUS)诊断上消化道黏膜下病变的临床价值.方法回顾分析行超声内镜(EUS)检查的258例上消化道胃黏膜下病变患者临床资料,上述患者行手术或微创手术(ESD等)切除,均有术后病理资料,以术后病理学检查为金标准,通过计算并比较EUS对不同病理类型和病变起源的上消化道黏膜下病变诊断的灵敏度与特异度,对EUS诊断上消化道黏膜下病变的临床价值进行评价分析.结果 EUS对不同病理类型诊断的灵敏度:脂肪瘤平滑肌瘤异位胰腺间质瘤,平均灵敏度为90.97%,组间比较差异无统计学意义(P0.05),特异度:脂肪瘤异位胰腺间质瘤平滑肌瘤,平均特异度96.17%,组间比较差异无统计学意义(P0.05);EUS对不同起源层次的上消化道黏膜下病变诊断灵敏度以固有肌层最高(91.18%),与固有肌层比较,黏膜下层特异度最低(79.41%),差异具有统计学意义(P0.05),平均灵敏度为85.55%,平均特异度为93.27%,各组间特异度比较差异无统计学意义(P0.05).结论 EUS对上消化道黏膜下病变有较高的诊断价值,可为临床诊治上消化道黏膜下病变提供有力证据.