Results 11 to 20 of about 9,619 (172)
Abstract For years Colombia has been the world's largest coca producer. Its public management of crops for illicit use has swung between eradication, substitution, and, recently legalization. Forced eradication has been shown to be ineffective, and legalization is an incipient option, so the Peace Agreement puts forward substitution as the path to ...
Mª Josep Cascant‐Sempere +2 more
wiley +1 more source
The domestic struggle for traditional medical knowledge rights
Abstract In China, the local communities and various ethnic minorities still hold, sustain and develop traditional medicial knowledge (TMK), innovations, and practices within the original communities. TMK also has pharmaceutical option value, which has attracted interests in commercial use of TMK for pharmaceutical innovation in China.
Nan Xia
wiley +1 more source
Identifying treponemal disease in early East Asia
Syphilis in China before Vasco da Gama? Abstract Objectives Historic records suggest that a virulent form of treponematosis, sexually transmitted syphilis was introduced to Asia from Europe by the da Gama crew, who landed in India in 1498. Our objective is to assess the gross pathology of human skeletal remains from the Tang dynasty of China to test ...
Yawei Zhou +8 more
wiley +1 more source
为探究不同生物炭混掺量对微咸水蒸发特性的影响,采用离心机试验和室内土柱模拟试验,设置3个生物炭质量添加比例(B0、B2、B4)和4个微咸水矿化度(W0、W1、W3、W5),分析不同处理对微咸水蒸发下的土壤水分特征曲线、孔隙分布、累积蒸发量、盐分运移、土壤温度日变幅的影响,并应用蒸发模型进行拟合分析。结果表明:生物炭和微咸水联合应用下能提高土壤持水能力,增加土壤中的较大孔隙和较小孔隙的比例;土壤累积蒸发量随着生物炭混掺量的增加先减少后增加,生物炭混掺量为2%时可以更好地抑制微咸水蒸发 ...
郑健 +4 more
doaj
A geothermal well in Ganzi was chosen for the study. To provide a reference for the design and construc?tion of a geothermal plant, power generation techniques were selected and the thermodynamic process was calculat?ed based on cold and heat source ...
卜宪标 +3 more
core
Occurrences of dust storms and long‐distance movement of dust across landscapes is constantly increasing in south Asia. This dust is expected to have profound impact on vegetation health and sustainability as dust may contribute to nutrient budgets of the forest ecosystems, while it could impart various stresses to the plants.
Shree P. Pandey +2 more
wiley +1 more source
Seawater desalination by ICP on a new microfluidic chip [PDF]
全球淡水资源匮乏受到越来越多的国家的重视,特别是一些水资源短缺的国 家和地区。海水淡化被认为是获得淡水资源的最佳途径之一。现如今海水淡化方 法发展较为迅速,其中主流技术有反渗透法、电渗析法以及蒸馏法等。 虽然上述三种方法发展较早,技术相对成熟,但能耗大、运营成本高,需要 搭建大型配套设备且不便移动,不易全球推广,特别是在欠发达国家。在淡水资 源短缺急剧严重的今天,寻找一种低能耗、成本低、便携式、使用寿命长、易于 市场推广、适合家庭以及个人使用的新型海水淡化装置迫在眉睫,本文研究设计 ...
葛立凯
core
吸附式水管理和蒸发冷却个人热管理(personal thermal management,PTM)技术在实现自适应温度调节、广泛适用性和低能耗方面具有巨大潜力。然而,设计兼具高效散热和穿着舒适性的高性能耐用吸湿复合材料是一项挑战。最近,Xu等利用两种吸湿聚合物和交联策略,开发出具有出色吸湿性、耐用性、延展性、透气性、耐洗性和抗菌性的吸湿织物。这项工作为全聚合物吸湿复合材料实现高效节能的吸湿和蒸发冷却的PTM应用前景铺平了道路。
高琰, 李洋, 陈晓
semanticscholar +1 more source
Synthesis, Separation and characterization of Fullerenes and Their Perchlorinated Fragments [PDF]
回顾富勒烯科学的发展历程,不难看出宏量合成在其发展过程中的的重要地位。为了寻找高产率的宏量制备方法,人们进行了广泛的探索和深入的研究。经过多年的努力,富勒烯的合成已经有多种方法,但这些制备方法几乎都难以选择性地合成某一种富勒烯,所以分离仍是一个必要而关键的步骤。在富勒烯科学上,另一个至今仍令人迷惑不解的是富勒烯的形成机理,虽然,象C60、C70等都已经可以方便地商业购得,但其形成过程仍旧是一个值得推敲和争论的问题。人们提出了多种机理来解释富勒烯的形成,但没有一个能解释所有的实验现象 ...
谢索原
core +1 more source
蒸发是西南喀斯特地区薄层土壤水分损失的主要途径,浅层土壤水分的存蓄对喀斯特地区农业生产和生态恢复至关重要。以西南喀斯特森林碳酸盐岩红土为研究对象,基于室内蒸渗试验设置4个苔藓生物量(0,0.32,0.64,0.95 kg/m2)和3个松针生物量(0,0.32,0.64 kg/m2)共12种处理,分析森林近地表层覆盖对碳酸盐岩红土蒸发过程及表层温度时空分布的影响规律,并对比3种蒸发模型(Black、Rose、空气动力学蒸发模型)在喀斯特森林碳酸盐岩红土的适用性。结果表明 ...
车陆禄, 刘冬冬, 杨娅, 陈雪
doaj

