Results 41 to 50 of about 1,399 (81)
Gaoya dianqi, 1997 利用动态图象高速微机采集系统,对纵向磁场线圈触头真空电弧形态进行了研究,触头开距从10mm到40mm变化,得出在相同电弧电流下,电弧扩散区域随开距增加而增加;电弧电压随开距增加而呈线性增加;弧柱电弧电场强度随开距增加而减少。这说明在长开距下,由于弧柱表面积增加,扩散到弧柱外的电子、离子和金属粒子相应增多,因而使输入到弧隙的能量增加以加热触头表面和加强粒子的扩散。
武建文, 王毅, 王季梅
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World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT Urban expansion significantly impacts flood risk, particularly in rapidly growing areas where impervious surfaces exacerbate surface runoff. This study examines spatial patterns of urban growth and their effects on flood exposure in Mecklenburg County, North Carolina, from 2011 to 2021.
Pegah Madadi, Azad Sadeghi
wiley +1 more source
The Role of Public Finance to Address the Global Finance Gap for Drinking Water Services
World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT Meeting SDG target 6.1 for drinking water requires addressing the finance gap between the funds available from tariffs, taxes and transfers, and the life‐cycle costs of sustaining these services. While there are li‐mitations to applying repayable finance to address this gap, governments can be well suited to support both drinking water ...
Kristina Nilsson
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2004 【目的】应用荧光PCR技术检测单细胞β地中海贫血(β地贫)基因,并与巢式PCR相比较,探讨荧光PCR应用于β地贫植入前诊断中的可行性。【方法】获取β地贫41-42突变杂合子单个淋巴细胞,用巢式PCR及荧光PCR技术检测β珠蛋白基因。【结果】160个淋巴细胞进行荧光PCR扩增,β地贫基因的平均扩增效率为92.5%,等位基因脱扣(ADO)率为8.8%;240个淋巴细胞进行巢式PCR扩增,β地贫基因的扩增效率为91.7%,ADO率为15.8%。两种方法的扩增效率没有统计学差异 ...
邓捷
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Changes in Key Biodiversity Area networks following national comprehensive assessments
Conservation Biology, Volume 40, Issue 1, February 2026.Making comprehensive assessments of Key Biodiversity Area (KBA) networks in a country greatly increases their number and area. Countries that have not yet done so will be missing about half of these globally significant sites and missing the opportunity to get 30 × 30 conservation in the right places. Abstract Key Biodiversity Areas (KBAs) are sites of
Andrew J. Plumptre +46 more
wiley +1 more source
Politics &Policy, Volume 54, Issue 1, February 2026.ABSTRACT Psychedelic interventions are not publicly available through Canada's healthcare system. Despite growing scientific evidence, public interest, and efforts to expand access to psychedelic therapies for end‐of‐life psychological suffering, Canadian policies remain restrictive.
Sarah Kratina +4 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1997 摘 要 建立泌尿生殖系统沙眼衣原体感染阳性标本直接基因分型方法。先用敏感的扩增沙眼衣原体特异质粒 的引物扩增500份临床标本, 初筛选出100份阳性标本再用扩增沙眼衣原体主要外膜蛋白( MOM P)基因的引物扩 增, 并用嵌套式PC R使阳性标本能扩增出MOMP基因, 对获得的MOMP基因用限制性酶切片段长度多态性 ( RFLP)方法进行基因分型,并用银染观察结果。其中E型比例最高,占47% ; F型为16% ; Da、G型均为6% ; Ba、D 型各占5% ; H型及K型均为1% ,混合型K /
汪玎妍 郭辉玉 罗宪玲 蒋文玲 李质怀
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Zhongguo shiyan zhenduanxue, 2020 急性传染病具有传播速度快、传播范围广、不易控制等特点,严重威胁着广大人民群众的生命安全,其快速检测、早期诊断尤为重要。环介导等温扩增技术(LAMP)是新型的基因扩增技术,可在恒温环境下快速、灵敏、高效、特异地进行基因扩增,具有特异性强、灵敏度高、检测耗时短、操作简便等优点。
赵阳 +5 more
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干血滤纸片DNA分析新生儿CYP21基因和SRY基因方法初探
Zhongshan Daxue xuebao. Yixue kexue ban, 2008 【目的】 初步探讨干血滤纸片DNA分析新生儿CYP21基因和SRY基因的方法? 【方法】 采用chelex-100提取20例新生儿的干血滤纸片DNA,采用一步法PCR扩增CYP21基因Exon1-3片段,与脐带血DNA的结果进行比较?同时检测了11例男性新生儿样本的SRY基因? 【结果】 应用干血滤纸片DNA模板,一步法PCR扩增CYP21基因的扩增效率为10%(2/20),脐带血的扩增结果为100%?SRY基因的扩增效率为100%(11/11)?
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Dianci bileiqi, 2020 液体硅橡胶作为电缆附件的组成材料,其密封受潮是电缆发生故障的重要原因之一,因此研究其吸水特性及其对电气性能的影响意义重大。研究了水分子在液体硅橡胶中的扩散模型,温度对水分子扩散过程的影响以及吸水对液体硅橡胶电学性能的影响。结果表明,水分子在液体硅橡胶中扩散过程符合Langmuir扩散模型,而不符合经典的Fick扩散模型,即水分子以"自由态"和"结合态"两种状态存在于在液体硅橡胶中;温度会同时影响水分子扩散进液体硅橡胶和液体硅橡胶中小分子硅氧烷和填料溶解两个过程 ...
尹桂来 +5 more
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