Results 11 to 20 of about 652 (98)

Study on Enrichment and Characterization of Triterpene Acid and Its α-Glycosidase Inhibitory Activity in Vitro from Hippophae rhamnoides Fruit Pomace(沙棘果渣三萜酸富集、表征及其体外α-葡萄糖苷酶抑制活性研究) [PDF]

open access: yesShipin kexue jishu xuebao, 2021
In order to improve the comprehensive utilization of Hippophae rhamnoides fruit pomace, a method for enrichment of the triterpene acids from Hippophae Rhamnoides fruit pomace was established by the octadecylsilyl (ODS) decompression elution, and the type
SU Chenyu(苏晨玉)   +3 more
doaj   +1 more source

Distribution Difference of Nutrients and Functional Components of Various Powders in Milling Layer of Highland Barley by Stratified Milling(青稞分层碾磨中各层粉体的营养及功能成分的分布差异) [PDF]

open access: yesShipin kexue jishu xuebao, 2021
In order to clarify the difference of nutritive composition of each milling layer of highland barley rice, the nutrients and functional composition in different milling layer of powder were compared.
ZHAO Mengmeng(赵萌萌)   +5 more
doaj   +1 more source

An atmospheric physics dataset observed from field stations on Tibetan Plateau

open access: yes中国科学数据, 2022
The Institute of Tibetan Plateau Research, Chinese Academy of Sciences (ITPCAS) has set up five field observation stations on Tibetan Plateau: Nam Co Monitoring and Research Station for Multisphere Interactions ...
Guo Xuejun   +6 more
doaj   +1 more source

Study on Changes of Nutrients, Polyphenol Contents, and Antioxidant Activities of Germinated Hulless Barley(萌发青稞营养成分、多酚含量及抗氧化活性研究) [PDF]

open access: yesShipin kexue jishu xuebao, 2019
In this study, the effects of different germination time on the main nutrients, polyphenol contents, and antioxidant activities of hulless barley were studied using Walan, 14-946, and Kunlun No.15 hulless barley as materials.
LIANG Yuhe(梁雨荷)   +5 more
doaj   +1 more source

祁连—海原断裂带库仑应力演化及地震危险性

open access: yesDizhen xuebao, 2022
祁连—海原断裂带是青藏高原东北缘重要的活动断裂带,调节着青藏高原北东向推挤作用和阿拉善地块的东西向运动。已有地震地质和数值模型结果显示,祁连—海原断裂带目前存在几个强震破裂空段且其上应力积累显著、断层闭锁程度高,2022年1月8日门源MS6.9地震即发生在祁连—海原断裂带西段的断层高闭锁、应力积累显著的破裂空段。为进一步认识祁连—海原断裂带未来的强震危险性,本文收集整理了青藏高原北部的强震破裂模型,并基于分层黏弹性流变模型计算了青藏高原北部1900年以来的强震对祁连—海原断裂带的库仑应力加载。结果显示 ...
Lin Zhu   +3 more
doaj   +1 more source

膜分离蚕豆蛋白酶解产物的理化性质及生物活性Physicochemical properties and biological activity of broad bean protein hydrolysate obtained by membrane separation technology

open access: yesZhongguo youzhi, 2022
以新鲜蚕豆为原料,采用碱溶酸沉法提取蚕豆蛋白,采用4种不同蛋白酶对蚕豆蛋白进行单酶或双酶酶解,通过比较蚕豆蛋白水解度和多肽得率筛选出最优的两种酶复合酶解蚕豆蛋白,将复合酶解液通过膜分离技术分离得到BBPHs-Ⅰ(10 kDa)5个不同分子质量的组分,对5个组分的氨基酸组成、紫外光谱、红外光谱进行分析,同时通过测定体外抗氧化活性及α-葡萄糖苷酶抑制率表征其活性。结果表明:选用菠萝蛋白酶和木瓜蛋白酶对蚕豆蛋白进行复合酶解;与膜分离前比较,膜分离后10 kDa以下的蚕豆蛋白酶解产物总氨基酸含量增加,BBPHs-
邓永蓉1,韩丽娟1,2,杨希娟1,2,党斌1,2,周雯1,张雪1,代云礼1 DENG Yongrong1, HAN Lijuan1,2, YANG Xijuan1,2, DANG Bin1,2, ZHOU Wen2, ZHANG Xue1, DAI Yunli1
doaj   +1 more source

青藏高原坡度坡长因子(

open access: yesShuitu Baochi Xuebao, 2023
地形是影响土壤侵蚀的主要因素,但目前关于青藏高原地形因子的分布格局和影响因素有待研究。基于1弧秒分辨率的SRTM(shuttle radar topography mission)高程数据,计算坡度、坡长、LS因子(slope length and steepness factors, LS),结合高程积分和Hack剖面等,对青藏高原LS因子的分布格局、统计分布特征和影响因素进行研究,结果表明:(1)坡度、坡长和LS因子这3个地形指标,均表现出高原内部小、四周高山大的格局 ...
黎恩丹   +5 more
doaj  

A study on the interaction between ground-air temperature differences over the Qinghai-Tibet Plateau and sea surface-air temperature differences over the Indian Ocean(青藏高原地气温差与印度洋海气温差的相互影响)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2018
青藏高原和印度洋均对我国气候有重要影响,研究高原和印度洋的热力状况及其耦合关系对全面了解我国的天气现象具有重要意义.利用1981 — 2010年(30 a)欧洲中心ERA-interim的青藏高原和印度洋温度资料,以及NCEP/NCAR的垂直速度和风速资料,分析了青藏高原地气温差和印度洋海气温差的特征及其相互影响.结果表明,高原冬、夏季地气温差有所区别:冬季地气温差呈东北-西南向的带状分布,在高原中部、西南边界喜马拉雅山脉地区和东南边界出现了较大的负值中心,其他地区均为正值;夏季地气温差均为正值 ...
SHENZiwei(申紫薇)   +2 more
doaj   +1 more source

利用Lg波Q值反双台层析成像方法研究青藏高原南部地区的地壳衰减

open access: yesDizhen xuebao, 2021
首次基于2017—2019年西藏自治区区域台网27个宽频带固定台站记录的757次地震的波形资料,利用反双台法开展了青藏高原南部地区1 Hz的Lg波Q值层析成像研究。研究中采用3.5—2.4 km/s的速度窗截取了1 981条Lg波,计算得到13 543条路径上的Q值,测试了1°×1°和0.5°×0.5°网格下的棋盘格恢复情况,得到了0.5°×0.5°分辨率的Lg波Q0值层析成像。反演结果显示:青藏高原南部地壳整体的Lg波呈高衰减、低Q值,与P波速度负异常、地热分布及东部的两条裂谷系对应良好 ...
Zhinan Lu   +3 more
doaj   +1 more source

The role of solar radiation and atmospheric circulation in the seasonal temperature changes of Qinghai-Tibet plateau(太阳辐射和大气环流在青藏高原气温季节变化中的作用)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2017
利用1981~2010年共30 a的美国国家环境预报中心(NCEP)再分析格点资料,对青藏高原及其周边温度的季节变化及可能机理进行了研究.发现:地表24 ℃等温线2~3月和11月的南北跳动可能是太阳辐射和季风环流共同作用的结果;200 hPa温度的季节变化早于地面和500 hPa,其原因可能与平流层爆发性增温造成的能量下传有关;青藏高原的低温与低的大气逆辐射密切相关.该结果可为进一步研究青藏高原气候变化及其规律提供参考.
TIANRongxiang(田荣湘)   +4 more
doaj   +1 more source

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