Results 1 to 10 of about 651 (134)

尿素包合法从葡萄籽油中富集高纯度 亚油酸甲酯及包合Enrichment of high purity methyl linoleate from grape seed oil by urea adduction and characterization of adduction complexes物表征分析

open access: yesZhongguo youzhi, 2022
为提升葡萄籽的使用价值,以葡萄籽油为原料,采用尿素包合法富集高纯度亚油酸甲酯。研究了脂肪酸甲酯与尿素质量比、尿素与95%乙醇质量比、包合时间和包合温度对包合效果的影响,并采用傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)和扫描电子显微镜(SEM)对空白尿素结晶物和包合固形物进行表征。结果表明:制备高纯度亚油酸甲酯的最佳工艺条件为脂肪酸甲酯与尿素质量比1∶ 2、尿素与95%乙醇质量比1∶ 4、包合温度5 ℃、包合时间10 h,在此条件下得到的亚油酸甲酯含量为94.83%,收率为40.41 ...
曾俊1,2,岳杨1,任小娜1,2,茹仙古丽·尤努斯1,2,姜蕾1,2 ZENG Jun1,2, YUE Yang1, REN Xiaona1,2, RUXIANGULI Younusi1,2, JIANG Lei1,2
doaj   +1 more source

Study on Interaction of Rutin and Ferulic Acid with Casein(芦丁和阿魏酸与酪蛋白的相互作用研究) [PDF]

open access: yesShipin kexue jishu xuebao, 2020
Interactions between phenolics and protein play important roles in the stability and bioactivities of functional milks enriched in phenolic compounds.
LEI Xuan(雷选)   +3 more
doaj   +1 more source

Analysis on Nutritional and Edible Quality in Different Parts of Alxa Bactrian Camel Meat(不同部位阿拉善双峰驼肉营养与食用品质分析) [PDF]

open access: yesShipin kexue jishu xuebao, 2022
Camel meat, as a high-protein, low-fat, low-cholesterol meat product with certain medicinal value, has always been an important object of meat nutrition research.In order to explore the quality characteristics of Alxa bactrian camel meat, the upper brain,
SUN Shuyuan(孙树远)   +3 more
doaj   +1 more source

The hydrothermal alteration types and zoning features of Ordovician carbonate in Tarim Basin(塔里木盆地奥陶系碳酸盐岩热液蚀变类型及蚀变流体的分带特征)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2019
已探明塔里木盆地下古生界碳酸盐岩地层储量巨大。对塔里木盆地西北部柯坪-巴楚-阿图什一带的4 块区域开展了系统的野外和重点观测工作,包括蓬莱坝剖面、柯坪水泥厂剖面、托普郎剖面等。本研究通过考察塔里木盆地奥陶系碳酸盐岩热液溶蚀及相关现象。从野外产状、伴生关系以及矿物岩石学特征角度解剖奥陶系地层中热液矿物组合的地质特征。研究表明,该区域存在富镁流体、富氟流体和富硫流体3 种流体,分别来源于封存卤水、火成活动和TSR 热液。不同性质流体蚀变具有相似的分带性。
DINGQian(丁茜)   +4 more
doaj   +1 more source

C-O, Sr isotope composition of the carbonate in Ordovician in Tarim Basin and implication on fluid origin(塔里木盆地奥陶系碳酸盐岩碳氧同位素组成及流体来源讨论)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2011
奥陶系碳酸盐岩储层是塔中地区重要的油气产层.测定塔里木盆地奥陶系热液矿物(方解石、石膏、重晶石等)及围岩的碳氧同位素以及锶同位素,分析结果显示,热液溶蚀围岩后释放的CO2可能是形成方解石中特征氧同位素组成的主控因素;自生碳酸岩矿物的碳同位素组成反映其在成岩期至少有2种碳源,早期形成的碳酸盐岩与二叠纪富13C的碳源相关,成岩早期至晚期的碳酸盐岩的沉淀或重结晶可能与由局部地质事件导致流体在沿裂缝系统运移时混合了有机质降解过程中产生的富12C的CO2有关;87Sr/86Sr值(0.708~0.718 ...
GAOQi-dong(高奇东)   +6 more
doaj   +1 more source

Characteristics and controlling factors of the large carbonate petroleum province in the Tarim Basin, NW China

open access: yesPetroleum Exploration and Development, 2011
A comprehensive analysis of hydrocarbon accumulation conditions and typical reservoirs reveals that a large carbonate petroleum province is formed around the Manjiaer depression in the Tarim Basin and it consists of Ordovician non-structural petroleum ...
Du Jinhu   +5 more
doaj   +1 more source

低温预榨-亚临界正丁烷提取光皮梾木油的理化性质及表征Physicochemical properties and characterization of Cornus wilsoniana fruit oil prepared by low temperature pre-pressing-subcritical n-butane extraction

open access: yesZhongguo youzhi, 2023
为获得高品质的光皮梾木油以作为生物柴油原料,采用低温预榨-亚临界正丁烷提取光皮梾木油,测定油脂提取率及光皮梾木油理化性质和脂肪酸组成,并利用热重分析仪、流变仪、傅里叶红外光谱仪分别对光皮梾木油的热稳定性、流变特性和官能团进行表征。结果表明:采用低温预榨-亚临界正丁烷提取光皮梾木油的油脂提取率为98.54%;光皮梾木油的酸值(KOH)为1.50 mg/g,碘值(I)为100.24 g/100 g,皂化值(KOH)为189.71 mg/g,折光指数为1.472 9;光皮梾木油的脂肪酸组分主要为亚油酸(38 ...
吴经芝1,2,吴红枚1,肖静晶1,2,3,4,李昌珠2,3,4,肖志红2,3,4 WU Jingzhi1,2, WU Hongmei1, XIAO Jingjing1,2,3,4, LI Changzhu2,3,4, XIAO Zhihong2,3,4
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特定培养条件下土壤有机质分解转化规律的研究

open access: yesShuitu Baochi Xuebao, 2004
通过室内培养实验,应用δ~(13)C方法研究了玉米秸秆分解期间,土壤固有及新形成有机质的分解转化规律。结果表明:玉米秸秆分解期间,土壤固有及新形成的有机质都逐渐分解,但前者的分解速度较慢。第360 d时,玉米秸秆和土壤固有有机质的残留率分别为30.0%和92.2%;720 d时分别为25.3%和78.8%。培养初期,富里酸的形成速度大于胡敏酸,而后富里酸转化为胡敏酸或相互转化;与新形成有机质相比,固有有机质中胡敏酸、富里酸的转化速度相对较慢。
张晋京 窦森 曹亚澄
doaj   +2 more sources

施用猪粪对棕壤胡敏酸和富里酸热力学参数的影响

open access: yesShuitu Baochi Xuebao, 2004
应用Vodyanitsky提出的方法,根据元素组成数据,计算了施用猪粪对棕壤胡敏酸(HA)、富里酸(FA)热力学参数的影响。结果表明,HA、FA的形成都是自发进行的放热反应;与HA相比,FA的能态较低,分子结构有序度和热稳定性较高;FA在土壤中比HA更容易形成。施用猪粪后,HA、FA的能态降低,分子结构有序度和热稳定性也降低,形成的自发性减弱且放热量减少,这些与它们元素组成的变化有关。
张晋京 窦森
doaj   +2 more sources

两种培肥措施对黑钙土有机无机复合体腐殖质组成的影响

open access: yesShuitu Baochi Xuebao, 2004
采用Kumada法研究了两种培肥措施对黑钙土及其复合体腐殖质组成的影响。结果表明,在根茬还田的基础上增施有机肥,可使全土及各级复合体的游离态和结合态腐殖质的胡敏酸、富里酸含量及△logK等不同程度地增大,PQ和RF值减小.腐殖化度降低,这种作用在粉粒复合体中表现最为明显。粘粒和粉粒复合体的游离态胡敏酸均为A或B型,细砂均为Rp型。随复合体粒径的增大,游离态胡敏酸类型的变化序列为A型(粘粒)→A型(粉粒)→Rp型(细砂);结合态胡敏酸大多为A型,少数为P或B型。黑钙土增施有机肥培肥后 ...
王杰 赵兰坡 刘会青 王鸿斌 王宇 王艳玲
doaj   +2 more sources

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