Results 131 to 140 of about 742,946 (271)
, 2011 针对1种典型的酸性、高有机质含量类型土壤——红树林土壤,从DNA产量、DNA纯度、土壤腐殖酸类物质的提取量以及DNA提取物PCR(polymerase chain reaction)扩增反应的敏感度等方面比较了不同提取缓冲液对土壤DNA品质的影响。结果表明,酸性SDS(sodium dodecyl sulfate)提取缓冲液所获得的土壤DNA产量及纯度均较低;PVP(polyvinylpyrrolidone)提取缓冲液所获得的土壤DNA产量较高,但土壤腐殖酸类物质的提取量亦远高于其他提取缓冲液 ...
蒋云霞, 郑天凌
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT A synergistic strategy combining a Ti interlayer and circular beam oscillation was proposed to improve the laser weldability of 6082‐T6 aluminum alloy. The Ti interlayer suppressed porosity, eliminated columnar grains, and significantly reduced grain size by 67.7% at the weld center. Mechanistically, fine L12‐Al3Ti precipitates clearly showing
Zhongping Hou +8 more
wiley +1 more source
四川大学学报. 自然科学版, 2005 利用微波效应,以水为溶剂提取川楝素.研究了微波功率、微波占空比、微波作用时间、溶剂用量等因素对川楝素提取率的影响.确定最佳的提取工艺条件为:微波功率300W,微波作用时间10min,固液比为1∶30,微波占空比50%.提供了一条以水为溶剂、微波为热源提取川楝素的绿色化学途径.
唐英 +6 more
doaj
[A multiscale feature extraction algorithm for dysarthric speech recognition]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023 Zhao J +5 more
europepmc +1 more source
, 2009 采用酸热法、有机溶剂法和热裂解法,利用滇池的水华蓝藻进行提取生物燃料的研究,并比较了这些方法的提取效率。滇池的水华蓝藻以微囊藻为主,酸热法和有机溶剂法提取的总酯含量为蓝藻干重的5%~10%,平均为7.21%;热裂解法提取生物燃料的效率最高,所提取的生物能(烃类)含量为蓝藻干重的16.5%~19.3%,平均为18.17%。表明利用水华蓝藻提取生物燃料符合现实水环境治理的需要 ...
樊庆春 +5 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Precise control of removal thickness is critical for laser cleaning of multilayer aerospace coatings particularly for selective removal without substrate exposure. However, the process response becomes highly sensitive near coating interfaces, making reliable parameter selection difficult.
Fanzhou Zeng +6 more
wiley +1 more source
Shuitu Baochi Xuebao[目的] 水土保持措施类型及其配置模式复杂繁多,准确识别与精细化提取水土保持措施详细配置信息是获取水土保持措施因子值的基础。[方法] 水土保持措施信息获取方式主要有传统的野外调查、卫星遥感影像和无人机近景摄影等,其识别与提取方法主要包括目视解译、传统的机器学习、面向对象分类方法及深度学习模型。通过梳理国内外水土保持措施识别与提取方法的研究成果,总结存在的不足并提出研究展望。[结果] 在语义分割中未来的特征融合与多模态学习、弱监督与半监督学习、集成学习和元学习等均可被运用到水土保持措施提取中。[结论 ...
田培, 任益伶, 陈妍
doaj
In vivo antioxidant activity of rabbiteye blueberry (Vaccinium ashei cv. 'Brightwell') anthocyanin extracts. [PDF]
J Zhejiang Univ Sci B, 2023 Wang J +6 more
europepmc +1 more source
, 2009 目的:采用超声波辅助技术提取迭鞘石斛多糖。方法:在单因素试验基础上,通过正交设计对提取工艺进行优化,主要考察因素为提取时间、温度和pH。结果:影响超声波辅助技术提取石斛多糖的主要因素为提取温度,优选方案为温度100℃、时间25min、pH7。结论:该方法简单,高效,具有良好的精密度和稳定性,重复性好 ...
罗傲雪, 淳泽, 罗傲霜, 范益军
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Bimetallic structures fabricated by laser powder bed fusion (LPBF) provide an effective strategy for achieving multifunctional integration, yet interfacial structural continuity and the role of lattice defects remain insufficiently understood.
Jinguo Ge, Shuo Yin
wiley +1 more source