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Determination of 9 Organotins in Food Contact Materials(食品接触材料中9种有机锡的检测) [PDF]
Shipin kexue jishu xuebao, 2021 An analytical method for simultaneous determination of organotins in food contact materials with different uses by gas chromatography-mass spectrometry was established.
QIAN Chong(钱冲) +6 more
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Shuitu Baochi Xuebao, 2022 为了探讨中国西北地区土壤有机质现状及影响因素,运用ArcGIS和地统计学结合的方法,研究西北地区土壤有机质的空间分布规律及其影响因素。结果表明:(1)研究区土壤有机质含量处于较低水平,3级及以下占68.94%,有机质变化范围为1.10~107.50 g/kg,均值为20.13 g/kg;通过半方差函数模型分析得到有机质的最适理论模型为球状模型。(2)通过绘制整个西北地区土壤有机质的空间分布图可知,研究区东部区域从宁夏、陕北至甘南、陕南,有机质含量呈现出梯级增加的趋势 ...
雷琪, 蒋洪丽, 吴淑芳, 冯浩
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Zhejiang Daxue xuebao. Lixue ban, 2023 在埋藏过程中，随着埋深的增加，细粒沉积岩的矿物组成、有机质形态、孔隙类型与质量分数等会发生一系列变化。为揭示其变化规律，对有机质热模拟的残样进行了扫描电镜、全岩X射线衍射、镜质体反射率（Ro）、岩石热解、有机碳质量分数等测试。发现在从室温（25 ℃）到550 ℃的升温过程中，有机质形态由团块状向条带状、团块状变化；黏土矿物由层片状逐渐向絮状转化；碳酸盐矿物溶蚀加剧，温度超过500 ℃后，出现溶蚀-沉淀现象；随着温度的升高，由有机质热演化产生的有机质孔的面积不断增加，在450~475 ℃时 ...
尹玲芝(YIN Lingzhi) +4 more
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Shuitu Baochi Xuebao, 2006 利用多目标地球化学调查方法，通过野外实地调查、大面积系统采集土壤表层、深层样品、测试分析和数理统计，探讨了三峡库区不同土壤类型深层和表层土壤中有机质含量分布特征。以紫色土为例探讨了不同分布高程、坡度和不同植被条件下对有机质含量的影响。结果表明：三峡库区土壤有机质含量总体上较低，均为矿质土壤。成土母质类型对土壤有机质含量影响明显，相同自然条件成土作用下，海相石灰岩母岩区的土壤有机质高于陆相砂、泥岩母岩区的土壤。在土地利用方式上，水耕模式有利于增加土壤有机质。地形高程、坡度对紫色土有机质分布影响明显 ...
钟远平, 唐将, WANG Li, 王力
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Journal of Adolescence, EarlyView.ABSTRACT Introduction Following rapid iterations in media technologies, Chinese millennials (born between 1980 and 1995) find themselves in a paradoxical state where digital saturation exists alongside fatigue, making them central practitioners of digital minimalist behavior.
Chao Zhang, Yinze Hao, Jingwen Li
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Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau
People and Nature, EarlyView.Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
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Intangible drivers of tolerance shape human–elephant coexistence in Southwest China
People and Nature, EarlyView.Abstract Southwest China is home to a small but rapidly expanding population of Asian elephants (Elephas maximus), whose growth has intensified conflicts with people living in shared landscapes. These conflicts result in substantial economic losses and occasional human casualties. This coexistence paradox—where conservation success leads to significant
Xiaoyu Yu +4 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Grasslands worldwide are experiencing severe degradation due to overgrazing, climate change and anthropogenic disturbances, resulting in substantial declines in biodiversity and ecosystem functioning.
Xiaoqi Wang +5 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
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