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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
wiley +1 more source
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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, 2008 浊点萃取是近年来出现的一种新兴的液-液萃取技术，它不使用挥发性有机溶剂，不影响环境。它以中性表面活性剂胶束水溶液的增溶性和浊点现象为基础，通过改变实验参数引发相分离，将疏水性物质与亲水性物质分离。作为一种分离富集的手段，浊点萃取具有萃取效率高、富集因子大、操作简便、安全、经济、便于实现联用等优点，越来越受到人们的关注和重视。本文在详细考察了非离子表面活性剂胶团溶液相行为的基础上，建立了以浊点萃取法为分离富集手段测定中草药有效成份的含量，并且通过微波辅助提取建立了分离纯化中草药有效成分的新方法 ...
孙晨
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International Journal of Applied Linguistics, EarlyView.ABSTRACT This computational linguistic study analyzes 8743 Rednote posts to examine how sentiment, emotion, and content domain collectively shape social comparison dynamics on social media. We identify four key findings: (1) an emotional gradient, where upward comparison content exhibits the highest sentiment scores and downward comparison the lowest; (
Michelle Mingyue Gu +7 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2009 研究了紫心甘薯总黄酮的微波提取工艺及其抗氧化活性.以芦丁为标准品,通过选用L9(34)正交表设计实验,确立提取总黄酮的最佳条件并以VC为对照品,采用DPPH •（二苯代苦味酰自由基）法研究提取物的抗氧化活性.紫心甘薯总黄酮的最佳提取条件为：乙醇浓度70%,提取温度80 ℃,料液比1 ：20,提取时间35 min；测得紫心甘薯薯肉和薯皮中总黄酮含量分别为1.55%和3.30%,二者抗氧化活性以半数抑制浓度(IC50)表示分别为0.020 4 ,0.019 2mg •mL-1 ...
GAOLi-wei(高丽威) +1 more
doaj +1 more source
"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
, 2013 本发明公开了一种微生物油脂提取方法，属于生物工程下游技术领域。以产油微生物发酵醪液为原料，经过酶解、有机溶剂浸提得到微生物油脂，浸提率最高可达100%。本发明不需要浓缩发酵醪液、回收菌体、干燥菌体等前处理操作，酶解条件温和，处理时间短，浸提温度低，浸提率高，对设备要求低，所用有机溶剂毒性小，大大降低了微生物油脂提取过程中动力和能量的消耗，降低了过程成本，减轻了对环境的污染和人体健康的损害 ...
靳国杰, 赵宗保, 杨帆
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Synthesizing Empirical Research on Learner Metacognition in Second Language Writing
International Journal of Applied Linguistics, EarlyView.ABSTRACT Despite considerable research interest in learner metacognition in second language (L2) writing, there is not yet a review that synthesizes the existing empirical findings and discusses their implications. To fill the void, this systematic review synthesized 39 empirical studies on learner metacognition in L2 writing and examined their salient
Chen Li, Icy Lee, Zhicheng Mao
wiley +1 more source
, 1993 一种薏苡仁酯的提取方法，其特征在于是采用索氏提取器，以丙酮溶剂对原料进行回流抽提。同时在进行层析柱分离处理时采用碱或氨水处理的碱性氧化铝吸附剂层析柱。该工艺与目前采用的技术相比，抽取溶剂丙酮用量少，不用碱洗及用溴麝香草酚蓝指示剂处理氧化铝吸附剂。其工艺过程短，简便易行，分离效果好，产品的收率高可达０．６％，并可较大幅度降低生产成品，因此适于在工业生产中应用 ...
刘和众
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