Results 71 to 80 of about 3,156 (150)
Effect of Varying Freeze-Thaw Cycles on Volatile Compounds in Roast Duck: An Investigation Using Headspace-Gas Chromatography-Ion Mobility Spectrometry Combined with Multivariate Statistical Analysis [PDF]
To definite the effect of varying freeze-thaw cycles on the aroma characteristics of roast duck, its volatile compounds were analyzed by sensory evaluation, electronic nose, and headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS) combined ...
GAO Ziwu, HE Jinhua, HOU Xinning, XU Anqi, ZHANG Dequan, WANG Zhenyu
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Analysis of Quality Differences between Tibetan Pork and Duroc×Landrace×Yorkshire Pork under Different Thermal Processing [PDF]
To examine the quality variations between Tibetan pork and Duroc×Landrace×Yorkshire (DLY) pork subjected to different thermal processing methods, this study analyzed changes in cooking loss rate, shear force, texture, and color under boiling, frying, and
Chunhui ZHANG +5 more
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Gaoya dianqi特高压直流输电线路形成的离子流在风力作用下迁移，由于风具有地域性与随机性，造成离子流密度ρj与合成场强E的量化评估困难。目前计及风力的E值统计评估未考虑到风速与风向随机性的关联，且缺少对多风向下离子流迁移的模拟。为此，文中以湖州±800 kV线路为例，将传统二维线路合成场有限元模型拓展到三维，得到—影响下ρj与E的变化规律，并以Copula函数构建概率模型，提出一种安全评估技术。结果表明：风速决定了空间电荷扩散程度，风向决定其扩散轨迹；风速增大使ρj与E先增大后减小；风向与线路走向夹角减小使风力影响减弱；
秦子翌 +4 more
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Shuitu Baochi Xuebao, 2018 通过田间桶栽试验研究了高浓度镉（40 mg/kg）条件下，4种改良剂（有机—无机复合稳定剂、无机高分子复配材料、聚丙烯酸盐复配材料、有机高分子复配材料）对棉田土壤剖面中土壤pH、阳离子交换量（CEC）、镉含量及其形态分布迁移的影响。结果表明：（1）4种改良剂均显著提高了棉田土壤剖面各层的pH和CEC，无机高分子复配材料在0—20 cm土层效果最好，分别增加了0.43个单位和4.43 cmol/kg；（2）改良剂促进土壤可交换态镉向其余4种形态的转化，相关分析表明碳酸盐结合态与可交换态镉含量呈极显著负相关（
安梦洁 +5 more
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Changes in Flavor Substances of Lightly-pickled Cucumbers during Storage Based on Electronic Nose Combined with GC-IMS [PDF]
In order to investigate changes in flavor substances of lightly-pickled cucumbers during storage, volatile compounds were analyzed by electronic nose and gas chromatography-ion mobility spectrometry (GC-IMS).
Dan WANG +6 more
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Dianci bileiqi, 2011 抽取了1支在铁路隧道内挂网运行的复合绝缘子,该绝缘子在运行时表面放电频繁,为了研究该绝缘子运行性能,在实验室进行了自然污闪电压、憎水性、材料拉伸强度、撕裂强度和硬度试验,利用离子色谱仪、电子扫描显微镜、X射线衍射分析、拉曼光谱对硅橡胶表面污秽进行分析,研究结果表明该绝缘子自然污闪电压较高,表面憎水性整体较差,憎水丧失及迁移性有所下降,硅橡胶材料力学性能良好,从污秽物分析结果看出,二水石膏的高温脱水造成憎水性下降以及表面污秽含碳量高,是绝缘子表面放电的主要原因。
谢从珍, 刘洋, 王建国
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基于等离子体射流的电力系统用硅橡胶绝缘材料憎水性提升装置研发
Gaoya dianqi, 2020 硅橡胶复合绝缘材料因其表面憎水性强、耐污闪性能好、少维护等优点,在电力系统中得到了广泛的应用。目前硅橡胶复合绝缘材料制作的绝缘子、套管等设备在同类设备中占比高,但因长期运行在大气环境下易受恶劣气候条件的侵蚀造成积污,导致憎水性降低、外绝缘裕度不足,进而给电网的安全、稳定运行带来了巨大的隐患。文中基于空气等离子体射流提升积污硅橡胶复合绝缘材料憎水性能这一特性,研究恢复硅橡胶材料憎水性等离子体电压、时间等参数特性,研究射流处理后的电气设备用硅橡胶材料机械性能、电性能、憎水性能变化特性 ...
李陈莹 +5 more
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Effects of Drying Methods on Quality Characteristics and Flavor of Dried Apples [PDF]
To investigate the processing methods that could improve the quality of Jingning dried apple snacks, the effects of five drying methods (hot air drying, solar drying, vacuum freeze drying, microwave-pressure puffing drying, and heat pump drying) on ...
Chaozhen ZENG +6 more
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Zhongshan Daxue xuebao. Yixue kexue ban, 2014 摘 要： 【目的】 探讨同型半胱氨酸（Ｈｃｙ）对外周血内皮祖细胞（EPC）迁移、粘附能力的影响。【方法】密度梯度离心法获取单个核细胞，接种于铺有人纤维连接蛋白包被的培养皿，培养７ ｄ后免疫荧光鉴定EPC。实验分对照组（Ｃｏｎｔｒｏｌ，ＣＴ）、５０ μｍｏｌ／Ｌ腺苷（ａｄｅｎｏｓｉｎｅ， Ａｄｅ）组（Ａ５０）、５０ μｍｏｌ／Ｌ Ｈｃｙ组（Ｈ５０）、５０ μｍｏｌ／Ｌ Ｈｃｙ＋５０μｍｏｌ／ＬＡｄｅ组（Ａ５０＋Ｈ５０）和５０ μｍｏｌ／Ｌ Ｈｃｙ＋５０ μｍｏｌ／Ｌ Ａｄｅ＋１０ ｎｇ ...
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Shuitu Baochi Xuebao, 2002 分析了松嫩平原土壤盐渍化过程的特殊性,认为本区土壤盐渍化地球化学模型的建立,必须同时考虑离子交换这一重要的地球化学过程,并提取出土壤盐分迁移的滞留因子R.建立了土壤次生盐渍化地球化学过程模型,探讨了模型的求解方法,模型计算与实测结果表现出较好的拟合度.同时利用该模型对不同环境、不同时间尺度条件下土壤剖面的水分及盐分状况进行了预测.
宋长春 邓伟 李取生
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