Results 41 to 50 of about 52,467 (200)
Lessons from an eradication under multiple constraints of an island rat population of record density
Conservation Biology, EarlyView.Abstract Invasive rats threaten island biodiversity, disrupting ecosystems and endangering native species. Although rat eradication has succeeded on many islands, tropical islands present unique management challenges. Strict regulations and financial constraints on some tropical islands further limit proven eradication methods, complicating rodent ...
Tatiane Micheletti +7 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2020 目的探讨在高原地区采用AMBION抽提试剂盒提取RNA的最佳条件。方法采用AMBION抽提试剂盒,对126份大鼠耳蜗(每份耳蜗分为2组,实验组和对照组)提取RNA,实验组采用AMBION抽提试剂盒优化条件提取RNA,对照组按照AMBION抽提试剂盒说明书提取RNA。结果实验组和对照组均能成功提取大鼠耳蜗组织RNA,总RNA的提取量分别为:0.896±0.348μg,0.536±0.404μg(P>0.05);实验组RNA浓度高于对照组,分别为:0.147±0.047μg/μl,0.072±0.022μg/
师晶晶 +5 more
doaj
Zhongguo youzhi, 2022 建立了适用于蛋黄卵磷脂（供注射用）中棕榈酸、棕榈油酸、硬脂酸、油酸、亚油酸、花生四烯酸、二十二碳六烯酸含量测定的分析方法。样品在具塞试管直接水浴加热甲酯化，正庚烷常温振荡提取后进气相色谱仪在起始柱温210 ℃下进行分析，利用外标法计算7种脂肪酸的含量。方法的专属性、精密度、准确度、耐用性考察均符合规定，在一定的质量浓度范围内，7种脂肪酸甲酯质量浓度与峰面积具有良好的线性关系，相关系数均大于0.999。该方法适用于蛋黄卵磷脂（供注射用）中7种脂肪酸含量的测定。 The method for the ...
温恺嘉，梁北梅，李咏华，林元亨，唐顺之，许文东 WEN Kaijia, LIANG Beimei, LI Yonghua, LIN Yuanheng, TANG Shunzhi, XU Wendong
doaj +1 more source
地矿测绘, 2020 为有效解决地性线的自动提取质量问题,进行了在ArcGIS环境下地性线自动提取的实验,经对实验结果的分析认为：以规则格网DEM为数据源,基于水文分析模型自动提取地性线,数据完整、准确度高、现场操作简单易行,较好指导了现场测量。对今后地性线的提取具有一定的借鉴意义。
金玲 连, 玉芝 李, 志强 徐
semanticscholar +1 more source
Distribution, scale, and drivers of mass mortality events in Europe's freshwater bivalves
Conservation Biology, EarlyView.Abstract Mass mortality events (MMEs) are decimating populations and compromising key ecosystem functions around the globe. One taxon particularly vulnerable to MMEs is freshwater bivalve mollusks. This group has important ecosystem engineering capacities and includes highly threatened and highly invasive taxa.
Daniel A. Cossey +39 more
wiley +1 more source
地矿测绘, 2020 针对传统建筑物点云提取算法中先滤波后提取依赖滤波精度,离散点云组织方式与参数设置困难,泛化能力弱等问题,利用改进的加权随机森林模型对LiDAR点云建筑物进行提取。首先针对传统随机森林算法等权投票方式导致分类器整体性能下降的问题,对随机森林分类的投票预测模型进行改进,并实现基于改进的加权随机森林模型对LiDAR点云建筑物的粗提取,然后运用改进的迭代三角网方法对初始建筑物点云进行精确提取,最后利用栅格化连通性原则实现建筑物点云的单体分割 ...
绍轩 洪, 枫 袁, 吉婧 齐
semanticscholar +1 more source
The collective application of shorebird tracking data to conservation
Conservation Biology, EarlyView.Abstract Addressing urgent conservation issues, such as the drastic declines of North American migratory birds, requires creative, evidence‐based, efficient, and collaborative approaches. The abundance of over 50% of monitored North American shorebird populations has declined by over 50% since 1980. To address these declines, we developed a partnership
Autumn‐Lynn Harrison +71 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2009 研究了紫心甘薯总黄酮的微波提取工艺及其抗氧化活性.以芦丁为标准品,通过选用L9(34)正交表设计实验,确立提取总黄酮的最佳条件并以VC为对照品,采用DPPH •（二苯代苦味酰自由基）法研究提取物的抗氧化活性.紫心甘薯总黄酮的最佳提取条件为：乙醇浓度70%,提取温度80 ℃,料液比1 ：20,提取时间35 min；测得紫心甘薯薯肉和薯皮中总黄酮含量分别为1.55%和3.30%,二者抗氧化活性以半数抑制浓度(IC50)表示分别为0.020 4 ,0.019 2mg •mL-1 ...
GAOLi-wei(高丽威) +1 more
doaj +1 more source
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
Using incentive payments to promote human–carnivore coexistence
Conservation Biology, EarlyView.Abstract For many large carnivores, minimizing the financial burden they impose on local people is critical to their conservation. Incentive‐based programs that provide people with financial benefits for taking pro‐conservation actions or achieving conservation goals are a promising tool for promoting human–carnivore coexistence. Although the number of
Adam Pekor +9 more
wiley +1 more source