Results 31 to 40 of about 8,968 (152)
Zhendong Ceshi yu Zhenduan针对离心式空调冷水机组的振动噪声问题，采用粒子阻尼技术进行减振降噪研究。首先，对振动特性进行分析，了解机组各结构振动情况以及振动传递路径；其次，建立有限元模型进行动力学分析，对空调机组进行模态分析，研究机组的振动敏感点，获得粒子阻尼器的最佳安装位置；然后，基于离散元法，设计冷水机组粒子阻尼器，比较最优粒子材质、粒径以及阻尼器不同布置方案的耗能值，得到最佳配置方案；最后，搭建实验台对所提方案进行验证。结果表明：冷水机组在386 Hz下，采用阻尼器最优方案时，压缩机机脚振动减少了4.89 dB ...
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中国人(广州地区)红细胞GPT遗传性多态现象的特点及血痕GPT的可测性研究
Zhongshan Daxue xuebao. Yixue kexue ban, 1986 谷丙转氨酶(Glutamic-Pyruvic Transaminase,GPT)是一种具有遗传性多态现象的细胞酶。它在机体各器官组织中广泛存在,尤以肝细胞含量最高。红细胞内GPT含量较少,但也有相当的活性。GPT有两种形式,分别存在于细胞质(可溶性型)和线粒体(线粒体型)之中。GPT分子由两个亚基组成,分子量约114,000道尔顿。
陈跃龙
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Harnessing solar energy for self‐heating presents an effective strategy to suppress surface ice formation. In this paper, we fabricated nano‐silver‐modified multilayer graphene sheets (Ag@MGs) that integrate photothermal and superhydrophobic properties for anti‐icing applications.
Yihan Zhang +7 more
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Zhongguo shiyan zhenduanxue, 2003 目的 构建含有肝细胞生长因子 （HGF）NK4基因的重组腺病毒载体 ,为应用HGF/NK4进行肿瘤基因治疗奠定实验基础。方法 应用AdEasy腺病毒载体系统 ,将PCR扩增所得的NK4基因片段与穿梭质粒pShuttle CMV进行连接 ,获得重组质粒pShuttle CMV NK4 ,将该质粒与腺病毒骨架质粒pAdEasy 1共转化大肠杆菌BJ5 183获得重组腺病毒质粒pAdCMV NK4 ,用该质粒转染 2 93细胞包装产生出重组腺病毒rvAdCMV NK4。重组腺病毒分别经电子显微镜技术及RT ...
介建政 +5 more
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Systematic Entomology, Volume 50, Issue 3, Page 495-518, July 2025.Using genomic data from 285 species across 19 planthopper families, we conducted the first phylogenomic study targeting global planthoppers and inferred their phylogeny with the highest resolution so far. We proposed taxonomic changes including the establishment of a new family Borysthenidae stat. rev. and a new superfamily Meenoploidea superfam.
Junchen Deng +9 more
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Functional Ecology, Volume 39, Issue 6, Page 1550-1566, June 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests store substantial amounts of soil organic carbon (SOC), but SOC stocks differ strongly between forest ecosystems dominated by arbuscular mycorrhizal (AM) or ectomycorrhizal (EcM) fungi.
Mengxu Zhang +10 more
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Zhongshan Daxue xuebao. Yixue kexue ban, 2000 【目的】对Hela 细胞端粒酶进行活性重组并探讨其重组特异性。【方法】以RT-PCR 法从纯化的人端粒酶复合 体中扩增人类端粒酶RNA(hTR)基因片段, 将其克隆至含有SP6 启动子的pGEM3f +质粒中, 构建hTR 的体外转录体系以获 得体外合成的hTR。与端粒酶蛋白组分进行活性重组。四膜虫端粒酶RNA 及16S rRNA 作为重组反应对照组, 以探测其重 组特异性。【结果】经RT-PCR 扩增出450 bp 片段;体外转录重组载体经酶切图谱和PCR 扩增鉴定构建成功;体外转录的 ...
周俊宜, 罗超权
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Veterinary Dermatology, Volume 36, Issue 3, Page 291-301, June 2025.Background – Canine interdigital furunculosis (CIF) is a complex, relapsing inflammatory condition, typically complicated by deep bacterial infections requiring prolonged systemic antibiotics. Hypothesis/Objectives – This split‐body study, where dogs acted as their own control, evaluated whether the adjunctive use of fluorescent light energy (FLE ...
A. Lange +12 more
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Haiyang yu huzhao光倒刺鲃(Spinibarbus hollandi)是我国南部重要经济鱼类，为了解其基因组特征及线粒体基因组结构，首次采用二代高通量测序技术对珠江和赣江水系光倒刺鲃基因组进行Survey分析，并在此基础上提取出两者的线粒体基因组。结果显示珠江和赣江水系光倒刺鲃基因组大小分别为1 769.91 Mb和1 846.46 Mb，均为简单杂合型基因组。珠江和赣江水系光倒刺鲃线粒体基因组长度分别为16 543 bp和16 546 bp，除16S rRNA、tRNA-Leu(UUA)和D-loop区外 ...
赖 洁 +8 more
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野生动物学报, 2016 线粒体基因组全序列的研究是近年来分子生物学研究的重要课题之一。本文对目前GenBank上公布的中国9种蜥蜴科动物线粒体基因组全序列的长度及组成进行分析,建立系统发育树,探讨蜥蜴科物种的起源、演化和亲缘关系。
马微微 刘 欢 赵文阁 刘 鹏
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