Results 91 to 100 of about 731,347 (200)

响应面优化氯化胆碱-丙三醇体系提取芝麻蛋白工艺条件 "Response surface optimization of the extraction process conditions for sesame protein using choline chloride-glycerol system"

open access: yesZhongguo youzhi
为提高芝麻油副产物芝麻饼粕中蛋白质的综合利用率,以芝麻粕为原料,选用氯化胆碱-丙三醇(物质的量比1∶ 3)体系(低共熔溶剂,DES)提取芝麻蛋白,通过单因素试验和响应面试验优化提取工艺条件,分析最优条件下提取的芝麻蛋白的功能特性,并采用傅里叶变换红外光谱和扫描电子显微镜对芝麻蛋白进行结构表征,同时与传统碱溶酸沉法提取工艺进行对比。结果表明:DES提取芝麻蛋白的最优条件为DES含水量10%、固液比1∶ 29.4、提取温度59.0 ℃、提取时间1 h、搅拌速度 750 r/min,在此条件下芝麻蛋白提取率为(
曹培换1,张晨霞1,刘燕2,马宇翔1,刘华敏1,郑永战1,3 "CAO Peihuan1,ZHANG Chenxia1,LIU Yan2,MA Yuxiang1, LIU Huamin1,ZHENG Yongzhan1,3"
doaj   +1 more source

一锅法提取锦灯笼宿萼及果实中玉米黄素的方法

open access: yes, 2014
本发明涉及玉米黄素的提取方法,具体地说是一锅法从锦灯笼宿萼及果实中提取玉米黄素,将提取液与皂化液同时加入锦灯笼宿萼及果实中,提取和皂化一步完成,经过简单分离、干燥后即可得到玉米黄素提取物。本发明所采用的方法将提取和皂化一步完成,工艺简单、效率高、有机溶剂用量少、玉米黄素收率高,可应用于食品、保健食品、药品、化妆品等领域 ...
邹汉法,  靳艳
core  

Lattice‐Defect‐Coordinated Microstructural Continuity and Mechanical Compatibility in LPBF‐Fabricated CoCrNi/316L Bimetallic Structures

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Bimetallic structures fabricated by laser powder bed fusion (LPBF) provide an effective strategy for achieving multifunctional integration, yet interfacial structural continuity and the role of lattice defects remain insufficiently understood.
Jinguo Ge, Shuo Yin
wiley   +1 more source

紫茎泽兰提取物抑制食源性致病菌的研究

open access: yes四川大学学报. 自然科学版, 2009
用黄芪,苦参,狼毒提取物为阳性对照对紫茎泽兰提取物进行抑菌活性比较。并利用液液萃取、色谱法对紫荆泽兰醇提物进行分离精制。结果表明,紫茎泽兰醇提物具有明显抑菌效果,且效果优于狼毒提取物和黄芪提取物;对紫茎泽兰醇提物进行分离精制及抑菌试验,结果显示其乙酸乙酯萃取物柱层析组分SF4-2抑菌活性最强,能显著抑制沙门氏菌,蜡样芽孢杆菌,金黄色葡萄球菌和枯草芽孢杆菌生长,可用于食源性抗菌制剂的开发利用。
王婧   +6 more
doaj  

一种从菊芋枝叶中提取甾醇的方法

open access: yes, 2014
本发明涉及植物甾醇的生产制备领域,具体地说是一种从菊芋枝叶中提取甾醇的方法。具体以菊芋枝叶为原料,原料浸在石油醚-乙醇体系中,5-35℃下搅拌反复浸提,浸提后溶剂旋蒸回收后得浓缩浸膏,所得浸膏依次进行硅胶柱层析、凝胶柱层析和制备高效液相色谱分离,分别得纯度均大于90%的β-谷甾醇(I)和豆甾醇(II)。本发明所使用的提取方法能够保持产品的天然特性,所用溶剂可以回收再利用,常温提取减少溶剂挥发损失并节约能源,石油醚乙醇毒性小 ...
季乃云, 王超之, 苗凤萍
core  

Role of funders in embedding tests in conservation practice

open access: yesConservation Biology, Volume 40, Issue 5, October 2026.
Abstract Effective conservation practice requires decisions based on reliable and relevant evidence, but significant gaps in the evidence base exist. Incorporating well‐designed tests of the effectiveness of interventions for biodiversity in conservation projects is one of the best ways to scale up the rate of evidence generation.
Rebecca K. Smith   +28 more
wiley   +1 more source

微藻食用油脂的提取与净化

open access: yes, 2016
近年来,使用微藻生产食用油脂进入了人们的视野。微藻油脂以甘油三酯为主,脂肪酸组成与植物油类似,有些还含有极具健康价值的多不饱和脂肪酸。本文考察了几种常见富油微藻生产食用油脂的潜力,并以微拟球藻藻粉为原料,建立了富含多不饱和脂肪酸的微藻油脂提取和精炼工艺。考察了小球藻、栅藻和微拟球藻油脂和藻渣应用于生产食用油的前景。使用适用于食用油生产的正己烷获得微藻油脂,小球藻和微拟球藻油脂收率均在50%左右,是栅藻的两倍,且小球藻藻油的中性脂含量最高;三种藻油脂的中性脂脂肪酸组成均以C16和18脂肪酸为主 ...
黄燕飞
core  

Risks of concealing environmental degradation

open access: yesConservation Biology, Volume 40, Issue 5, October 2026.
Abstract Current practice seeks to conceal the visual impact of land‐use change (i.e., development). Six percent of development impact assessments in Australia and 14% of the World Bank's assessments recommend visual impact mitigation. This mitigation results in, for example, vegetated buffer strips alongside cleared agricultural areas and earthen ...
Matt W. Hayward   +8 more
wiley   +1 more source

一种从菊芋叶片中提取纯化绿原酸的方法

open access: yes, 2013
本发明涉及一种从菊芋叶片中提取纯化绿原酸的方法。本发明以菊芋叶为原料,经加热回流或超声提取,固液分离后得绿原酸提取液,再经膜分离和膜浓缩后过大孔树脂柱,流加洗杂液洗杂,用洗脱液洗脱至高效液相色谱(HPLC)检测无绿原酸流出,并收集洗脱液,洗脱液减压浓缩,经活性炭脱色,再经喷雾干燥后得绿原酸纯度为94%以上的高纯度绿原酸。该方法不仅样品处理量大,操作简单,适用于工业化生产,而且弥补了金银花等中药资源作为绿原酸提取原料的不足,变废为宝,为提取绿原酸提供一个新的来源,具有较好的经济效益 ...
方圣涛, 夏传海, 孙鹏程
core  

Integrating fossil data in ecological niche models to improve predictions of future habitat of Caribbean corals

open access: yesConservation Biology, Volume 40, Issue 5, October 2026.
Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams   +3 more
wiley   +1 more source

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