Results 111 to 120 of about 24,826 (264)
Archaeometry, EarlyView.ABSTRACT This study presents the first GC‐MS–based analyses of wide horizontal rim vessels with well‐defined funerary contexts, from Middle Bronze Age Portugal (Quinta do Amorim 2 and Pego). Organic residues from two vessels revealed ruminant fats and plant oils, alongside molecular markers of heat exposure.
João Vinícius Back +5 more
wiley +1 more source
Zhongguo youzhi旨在为柚皮精油（EO）在油脂及其乳液中的应用提供参考，对EO的挥发性成分、总酚含量和抗氧化活性进行了测定，并将EO添加于亚麻籽油及其乳液中，考察不同质量浓度EO对亚麻籽油氧化诱导时间的影响，及对亚麻籽油乳液在60 ℃避光储藏过程中物理稳定性和氧化稳定性的影响。结果表明：EO的主要挥发性成分是以D-柠檬烯为主的萜烯类物质，总酚含量为8.28 mg/mL，EO具有较强的DPPH、ABTS自由基清除能力及还原能力，当其质量浓度为6 mg/mL时，亚麻籽油的氧化诱导时间最长，为4.70 h。在60 ...
邵馨漫1，程晨1，邓乾春2，祝振洲1，夏伏建2，罗芳1，余佳利1，李书艺1 SHAO Xinman1, CHENG Chen1, DENG Qianchun2, ZHU Zhenzhou1, XIA Fujian2, LUO Fang1, YU Jiali1, LI Shuyi1
doaj +1 more source
Streaming potential analysis of hair variation: Ethnicities and environmental exposures
International Journal of Cosmetic Science, EarlyView.Ethnicity and weathering shape electrokinetic behaviour and particle deposition in hair. ζ‐potential magnitudes ranked Caucasian > Indian > Chinese with no significant root‐tip variations. Deposition patterns generally correlate with ζ‐potential but differ by ethnicity, implicating other factors.
Huijun Phoebe Tham +2 more
wiley +1 more source
三级菜籽油280 ℃加热试验的影响因素研究Influencing factors of third-grade rapeseed oil in 280 ℃ heating test
Zhongguo youzhi旨在为菜籽油的工业生产提供理论支撑，研究了三级菜籽油280 ℃加热试验可能的影响因素。对18个280 ℃加热试验合格和15个280 ℃加热试验不合格三级菜籽油的质量指标（酸值、过氧化值、水分及挥发物含量）、甘油酯组成、脂肪酸组成、色泽和叶绿素含量、主要胶溶性组分（磷脂、蛋白质）进行对比，并通过主成分分析（PCA）和皮尔逊相关性（PCCs）分析对各指标进行可视化分析。结果表明：两组三级菜籽油的酸值、过氧化值、水分及挥发物含量、总色泽与叶绿素含量、脂肪酸组成、甘油酯组成之间无显著差异，280 ...
刘书成1，姜碧若2，梁建华2，曾裕2，宋婕1，毕艳兰1,3 LIU Shucheng1, JIANG Biruo2, LIANG Jianhua2, ZENG Yu2, SONG Jie1, BI Yanlan1,3
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Extending Transit Facility to India: Implications for Pakistan’s Bilateral Trade with Afghanistan [PDF]
The paper examines patterns of bilateral trade between Pakistan, India, Afghanistan and CARs. It also investigates whether providing India transit route to Afghanistan has opportunity costs for Pakistan’s trade potential with Afghanistan and CARs.
Aslam, Rizwan +5 more
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Electrokinetic analysis reveals common conditioner ingredient interactions with human hair
International Journal of Cosmetic Science, EarlyView.Novel electrokinetic analysis reveals how cationic surfactant deposition on hair is influenced by chain length and counterion mobility. Longer‐chain surfactants show superior adsorption through enhanced van der Waals interactions, while chloride counterions enable stronger electrostatic interactions.
Huijun Phoebe Tham +4 more
wiley +1 more source
Zhongguo youzhi工业规模的光自养微藻生物质中油脂含量低，无法满足制生物柴油要求，培养过程缺少指导，且现有理论模型在工业规模下缺乏应用验证。为了对大型工业光反应器生产过程进行预测和调整，分析探讨了高含油量微拟球藻培养的技术难点和改进措施，基于一种光吸收系数（f2）估测方法和最大生物质产量的理论模型，提出了一套低成本高含油量微藻培养方案，并在工程中进行实践检验。实践表明：在以跑道池26为光反应器，藻液高度15 cm，氮供应量为改良f/2培养基的1/9条件下，成功生产出油脂含量高于30%的微拟球藻藻粉。综上 ...
黄聪1, 何荣1, 魏帅1, 陈湛平1, 李俊2， 杨黄鹏2， 王珍懿3， 辛凯3， 程军3,4 HUANG Cong1, HE Rong 1, WEI Shuai1, CHEN Zhanping1, LI Jun2, YANG Huangpeng2, WANG Zhenyi3, XIN Kai3, CHENG Jun3,4
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The hidden science of haptics: A pedagogical review of tactile evaluation in cosmetics
International Journal of Cosmetic Science, EarlyView.This review explores the physiological basis of tactile perception and critically examines classical and emerging sensory methods used in cosmetics, advocating for broader methodological integration and recognition of sensory analysis in the field. Abstract Sensory analysis is a cornerstone of cosmetic development, yet remains underrepresented in peer ...
Morgane Postec +2 more
wiley +1 more source
Zhongguo youzhi旨在建立一种脱水蓖麻油指标的快检方法,对不同脱水程度蓖麻油样品进行低场核磁共振（LF-NMR）扫描，结合化学计量学方法，分析弛豫特性指标与脱水蓖麻油样品羟基值、共轭亚油酸和非共轭亚油酸含量的相关性，通过对建模数据、预处理方法和建模方法进行优化，建立脱水蓖麻油羟基值、共轭亚油酸和非共轭亚油酸含量预测模型，并对模型的准确性和稳定性进行验证。结果表明：脱水蓖麻油羟基值、共轭亚油酸和非共轭亚油酸含量与弛豫特性中单组分弛豫时间τ2w、弛豫时间τ21和τ22、峰面积S21和S22均呈现良好的线性关系 ...
王琰，闫枫丹，孙悦文，许盼盼，刘梦洋，李文龙，彭丹，李军 WANG Yan, YAN Fengdan, SUN Yuewen, XU Panpan, LIU Mengyang, LI Wenlong, PENG Dan, LI Jun
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Intra-industry trade in Latin America and the Caribbean [PDF]
An increasingly important component of total world trade is intra-industry trade (IIT). The large volume of literature on IIT is reflective of this importance.
Fullerton, Thomas M., Jr. +2 more
core +1 more source