Results 51 to 60 of about 742,946 (271)
Conservation Biology, EarlyView.Abstract The sustainability of area‐based conservation initiatives depends on their value to society. Conservation often focuses inside protected areas, but the impacts of protected areas beyond their boundaries (spillovers) are critical for their social license.
Ilaria Gliottone +5 more
wiley +1 more source
四川大学学报. 自然科学版, 2004 瑞香狼毒根的乙醇索氏提取粗膏及粗膏的正己烷索氏提取物和石油醚索氏提取物对柑桔全爪螨的毒力分别是氧乐果原药毒力的0.34倍、12.8倍和11.5倍,其中可能含有更高毒性的物质.乙醇粗膏的乙酸乙酯索氏提取物对正己烷索氏提取物和石油醚索氏提取物有强烈的抑制减效作用.
潘为高 +6 more
doaj
"fordi før så skreiv æ Å-G". En studie om andreklassingers valg av stavemåter.
, 2023 The purpose of this master's thesis has been to look at the choices students in Year 2 make when spelling words. The students participating in this research are in the transition between phonological and orthographic writing, and the study will focus on how these students adopt different spelling strategies. The assignment's data material is taken from
openaire +1 more source
Pest‐preservation paradox among insects
Conservation Biology, EarlyView.The pest‐preservation paradox is a non‐binary perspective that insects range from those that are harmful and requiring management on the one side, to those requiring conservation intervention on the opposite end of the spectrum. Importantly, the vast majority of insects occur somewhere in the center of the two extremes, and their position along the ...
Michael J. Samways +3 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2006 目的为寻找一种高效、简便、实用的石蜡组织中DNA提取方法,本研究比较了三种不同的DNA提取方法对DNA质量的影响。方法选取淋巴相关组织的蜡块21例。三种DNA提取方法分别是简单消化煮沸法,酚/氯仿提纯法和试剂盒法。通过提取DNA的浓度和纯度、PCR扩增保守序列β-globin等方法,比较三种DNA提取方法的优劣。结果试剂盒法提取样品OD260/OD280平均比值位于1.61.8之间;提纯法位于1.31.5之间;简单消化煮沸法位于1.21.3之间。三种方法中,试剂盒法提取的DNA最为稳定 ...
齐宗利 +4 more
doaj
, 2014 本发明公开了一种易变山羊草的咖啡因提取物及其提取方法与应用，属于生物工程领域。本发明中易变山羊草的咖啡因提取物的提取方法的具体步骤如下：取易变山羊草根部清洗后切成片，在80℃烘箱中烘干6小时彻底去除水分，然后用粉碎机粉碎，过60目筛后，把10克粉碎的易变山羊草根部样放入50毫升的萃取釜中，采用无水乙醇作为夹带剂，在CO2提取仪中30MPa，60℃萃取2h，其中CO2流量控制在1.5LPM，获得易变山羊草的咖啡因提取物。本发明研究表明＞0.1％浓度的咖啡因对植物病原线虫有生长有抑制作用 ...
郑明辉 +6 more
core
Conservation Biology, EarlyView.Abstract Global farmland biodiversity is declining rapidly, threatening both natural ecosystems and agricultural production. Although agri‐environmental schemes incentivize farmers to adopt environmentally friendly measures, the spatial mismatch between their local implementation and the landscape‐scale habitat requirements of farmland species has been
Annika L. Hass +5 more
wiley +1 more source
四川大学学报. 自然科学版, 2013 用水蒸气蒸馏法、超声辅助浸提法和索氏提取法提取山桐子果实中的挥发油,用GC-MS分离鉴定其成分并测定各成分的相对含量.水蒸气蒸馏法、超声辅助浸提法和索氏提取法分别分离鉴定出64、50和57个组分,共有化合物38种,其中主要成分为亚油酸、棕榈酸、油酸、角鲨烯、椰子醛和γ-维生素E等.3种提取方法所得山桐子果实挥发油成分有共同特征,也存在着差异,相较之下,水蒸气蒸馏法提取的挥发油成分最多,索氏提取法提取挥发油率最高.
叶扬 +5 more
doaj
, 2005 本发明属医药技术领域，公开了抗肿瘤植物提取物及其提取方法。以蓼科植物束序苎麻(Boehmeria siamensis Craib，Urticaceae)为原料，经溶剂提取和层析方法分离并鉴定了两个新的菲并喹喏里西定型生物碱：3，6，7-三甲氧基-11，12，13，14，14a，15-六氢-9H-菲[9，10-b]并喹喏里西定和3，7-二甲氧基-6-羟基-11，12，13，14，14a，15-六氢-9H-菲[9，10-b]并喹喏里西定，体外抗肿瘤活性实验表明 ...
田雅娟 +7 more
core
Integrating migratory connectivity data into the conservation of Australian sharks and rays
Conservation Biology, EarlyView.Abstract Understanding migratory connectivity is important for conserving highly mobile marine species facing escalating threats. Establishing baseline information on migratory connectivity is necessary for identifying species and regions requiring transboundary cooperation for their conservation.
Diego F. Bezerra +9 more
wiley +1 more source