Results 51 to 60 of about 29,838 (168)
Zhongguo shiyan zhenduanxue, 2020 目的探讨在高原地区采用AMBION抽提试剂盒提取RNA的最佳条件。方法采用AMBION抽提试剂盒,对126份大鼠耳蜗(每份耳蜗分为2组,实验组和对照组)提取RNA,实验组采用AMBION抽提试剂盒优化条件提取RNA,对照组按照AMBION抽提试剂盒说明书提取RNA。结果实验组和对照组均能成功提取大鼠耳蜗组织RNA,总RNA的提取量分别为:0.896±0.348μg,0.536±0.404μg(P>0.05);实验组RNA浓度高于对照组,分别为:0.147±0.047μg/μl,0.072±0.022μg/
师晶晶 +5 more
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Ibis, EarlyView.Anthropogenic factors such as artificial lighting at night (ALAN) and natural factors including temperature and moonlight can affect the dawn chorus pattern in birds. However, most studies are conducted in temperate regions. We investigated the effect of anthropogenic and natural factors on dawn chorus timing in eight species of bird across Hong Kong ...
Ann W. Y. To, Sarah A. Collins
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"fordi før så skreiv æ Å-G". En studie om andreklassingers valg av stavemåter.
, 2023 The purpose of this master's thesis has been to look at the choices students in Year 2 make when spelling words. The students participating in this research are in the transition between phonological and orthographic writing, and the study will focus on how these students adopt different spelling strategies. The assignment's data material is taken from
openaire +1 more source
A Systematic Scoping Review of Self‐Regulated Learning With AI in Language Education
International Journal of Applied Linguistics, EarlyView.ABSTRACT The rapid development of artificial intelligence (AI) technology has brought new opportunities for second/foreign language (L2) education while also raising concerns about the use of AI tools. This systematic scoping review provides a snapshot of the current state of research situated at the intersection of self‐regulated learning (SRL) and AI
Zheng Zhang, Sihan Zhou, Barry Bai
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四川大学学报. 自然科学版, 2004 瑞香狼毒根的乙醇索氏提取粗膏及粗膏的正己烷索氏提取物和石油醚索氏提取物对柑桔全爪螨的毒力分别是氧乐果原药毒力的0.34倍、12.8倍和11.5倍,其中可能含有更高毒性的物质.乙醇粗膏的乙酸乙酯索氏提取物对正己烷索氏提取物和石油醚索氏提取物有强烈的抑制减效作用.
潘为高 +6 more
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao +2 more
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Zhongguo shiyan zhenduanxue, 2006 目的为寻找一种高效、简便、实用的石蜡组织中DNA提取方法,本研究比较了三种不同的DNA提取方法对DNA质量的影响。方法选取淋巴相关组织的蜡块21例。三种DNA提取方法分别是简单消化煮沸法,酚/氯仿提纯法和试剂盒法。通过提取DNA的浓度和纯度、PCR扩增保守序列β-globin等方法,比较三种DNA提取方法的优劣。结果试剂盒法提取样品OD260/OD280平均比值位于1.61.8之间;提纯法位于1.31.5之间;简单消化煮沸法位于1.21.3之间。三种方法中,试剂盒法提取的DNA最为稳定 ...
齐宗利 +4 more
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Zhongguo youzhi旨在揭示弱酸高盐法提取菜籽蛋白的潜力，以脱脂低温压榨菜籽饼为原料，MgCl2溶液为提取液，采用弱酸高盐法提取菜籽蛋白，采用单因素实验研究提取温度、提取pH、提取时间、提取液浓度及料液比对菜籽蛋白提取率的影响，采用正交实验进行菜籽蛋白的弱酸高盐法提取工艺优化，并比较弱酸高盐法菜籽蛋白与碱提酸沉法菜籽蛋白在抗营养因子（植酸、硫苷和单宁）含量与感官特性（气味、色泽）上的差异。结果表明：弱酸高盐法提取菜籽蛋白的最佳工艺条件为提取温度50 ℃、提取pH 6.5、提取时间150 min、提取液浓度150 mmol ...
方雪莲1,2，冯子盛1，何静仁1,3,4，杨尚华5，张瑞1,3,4 FANG Xuelian1,2, FENG Zisheng1, HE Jingren1,3,4, YANG Shanghua5, ZHANG Rui1,3,4
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International Journal of Applied Linguistics, EarlyView.ABSTRACT This article examines the language life of young Malaysian Chinese immigrants in Australia and their construction of multi‐membership as reflected in their daily language behaviors. It develops the concept of everyday linguistic citizenship and uses this concept as a theoretical lens to understand how the young adults build, maintain, and ...
Xiaoyi Zhang +2 more
wiley +1 more source
四川大学学报. 自然科学版, 2013 用水蒸气蒸馏法、超声辅助浸提法和索氏提取法提取山桐子果实中的挥发油,用GC-MS分离鉴定其成分并测定各成分的相对含量.水蒸气蒸馏法、超声辅助浸提法和索氏提取法分别分离鉴定出64、50和57个组分,共有化合物38种,其中主要成分为亚油酸、棕榈酸、油酸、角鲨烯、椰子醛和γ-维生素E等.3种提取方法所得山桐子果实挥发油成分有共同特征,也存在着差异,相较之下,水蒸气蒸馏法提取的挥发油成分最多,索氏提取法提取挥发油率最高.
叶扬 +5 more
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