Results 11 to 20 of about 2,191 (179)
Rare Metals, Volume 42, Issue 11, Page 3718-3728, November 2023., 2023 Graphical abstract Abstract A flexible carbon fiber‐confined yolk‐shelled silicon‐based composite is reported as an anode material for lithium storage applications. Silicon nanoparticles (Si NPs) are confined by the N‐doped hollow carbon cages (Si‐NHC) and these uniform dispersed yolk‐shell‐structured Si‐NHC units were encapsulated by the carbon fibers
Dong‐Chen Jia +8 more
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Factors that shape large‐scale gradients in clonality
Journal of Biogeography, Volume 50, Issue 5, Page 827-837, May 2023., 2023 Abstract Aim Many plant species reproduce clonally. However, ecologists still have much to learn about the factors that shape large‐scale patterns in plant clonal growth and reproduction, especially in the southern hemisphere. We addressed this knowledge gap by quantifying relationships between reproductive mode and a suite of plant characteristics and
Hongxiang Zhang +4 more
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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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西藏列廷冈-勒青拉铅锌铁铜钼矿床成矿流体特征:来自流体包裹体及碳氢氧同位素的证据
Earth Science-Journal of China University of Geosciences, 2019 列廷冈-勒青拉矿床位于西藏冈底斯北缘多金属成矿带东侧，是该成矿带内一个独特的同时发育Pb、Zn、Fe、Cu、Mo五种元素矿化的典型矽卡岩型矿床.对该矿床成矿流体性质研究有助于解决这种具有不同来源属性的多金属共生矿床的成矿机制等科学问题.基于此，选取与Fe-Cu-Mo矿化和Pb-Zn-Cu矿化密切相关的矽卡岩矿物和脉石矿物，系统开展了流体包裹体和碳氢氧同位素研究，结果显示二者的成矿流体来源相同并经历了相似的演化过程.矽卡岩阶段主要发育富液相包裹体，成矿流体具有高温中高盐度特征 ...
马旺 +11 more
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Shuitu Baochi Xuebao, 2005 采用第二次土壤普查资料,研究了安徽省不同土地类型表层土壤的有机碳密度和碳库的特点。结果表明,安徽省平均有机碳密度为(31.64±16.39)tC/hm2,林地土壤表层有机碳密度高于全省表层土壤平均有机碳密度,旱作土壤表层有机碳密度则低于全省平均值。有机碳密度的大小顺序为:林地>水稻土耕层>旱地。安徽省表层土壤有机碳储量分布也表现为:林地>水稻土>旱地。表层土壤有机碳总量达0.28 Pg,其中林地占50%,水稻土占23%,而旱地只占18%。因此,人为利用特点是区域土壤碳库和碳密度的主要影响因素。分析表明 ...
许信旺 潘根兴 侯鹏程
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Evolution Characteristics of Soil and Water Conservation Carbon Pool and Its Carbon Sink Potential in Typical Small Watershed of the Loess Plateau [PDF]
[Objective] To investigate the evolution of soil carbon pool under catchment scale integrated soil and water conservation measures and evaluate the potential of soil and water conservation carbon sink. [Methods] Typical small watershed for soil and water
DONG Pengbei +5 more
core +1 more source
Research on carbon emission accounting model for open-pit mines in alpine ecologically fragile areas [PDF]
To accurately measure carbon emissions from open-pit mines in alpine ecologically fragile areas, a rigorous and comprehensive accounting method is essential. This method must account for both direct emissions from mining operations and indirect emissions
Bin BAI +5 more
core +1 more source
Shuitu Baochi Xuebao, 2005 基于重庆市第二次土壤普查的1411个土壤剖面数据，结合重庆市土壤图、土地利用现状图和行政区划图，在地理信息系统技术的支持下，对重庆市土壤有机碳密度及储量进行了估算、同时引入有机碳丰度指数这一指标，对有机碳在不同土壤、不同区域以及不同景观中的分布特征进行了分析。结果表明：重庆市20cm和100cm深度的土壤有机碳储量分别为0．27Tg和1．0Tg；20cm深度的土壤有机碳密度介于0．33～30．36kg／m^2之间．100cm深度的土壤有机碳密度介于1．27～72．69kg／m^2之间 ...
黄雪夏 倪九派 高明 魏朝富 谢德体
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Engineering 2D Materials for High‐Current‐Density Electrocatalytic Water Splitting
Rare Metals, EarlyView.ABSTRACT Water electrolysis is a key method for sustainable hydrogen production, using water as an abundant resource. However, efficient and stable operation at high current densities remains challenging due to energy losses, catalyst degradation, and limited ion–electron transport.
Tianqi Guan +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2023 为探究植被根系作用下不同粒径团聚体内碳组分含量的相对变化及其主要影响因素,以黄土高原地区自然生长的直根系植物铁杆蒿(Artemisia gmelinii Web.)和须根系植物长芒草(Stipa bungeana Trin.)典型植被为研究对象,以退耕1年撂荒地为对照样地(CK),测定各粒径团聚体质量占比及其土壤有机碳(SOC)、颗粒态有机碳(POC)、矿物结合态有机碳(MAOC)含量,分析土壤基本理化性质和根系特征参数与不同粒径团聚体碳组分特征间的相互关系。结果表明:(1)与撂荒地相比 ...
于雯霏 +4 more
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