Results 21 to 30 of about 4,459,435 (166)
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Germanium is a critical dispersed metal, yet sustainable recovery from dilute solutions is limited by sorbents that are difficult to regenerate and operate in continuous mode. Here, we fabricate a regenerable 3D‐printed hydrogel monolith (3D‐ATO‐GS) by integrating hydroxyl‐rich amorphous TiO2 nanoparticles into an alginate/gelatin scaffold ...
Wenhuan Guo +6 more
wiley +1 more source
Gongye shui chuli, 2020 以2，4-二氯苯氧乙酸（2，4-D）为模板分子，改性壳聚糖为载体，甲基丙烯酸、丙烯酰胺、2-乙烯基吡啶为功能单体合成了3种2，4-D表面分子印迹聚合物。通过FT-IR和SEM对聚合物进行了表征，考察了3种表面印迹聚合物对2，4-D的吸附性能、吸附等温线和吸附动力学。结果表明，3种表面分子印迹聚合物对2，4-D均具有较好的吸附效果、符合Langmuir方程和准二级动力学方程。热力学分析结果表明，该吸附过程为自发、熵增和吸热过程。
仝海娟 +5 more
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四川大学学报. 自然科学版, 2005 作者将分子模拟技术应用于材料介电性能研究中,以了解介电常数随温度变化规律的问题,从而有效地分析相关的微观结构特性.首先利用分子动力学对微观结构模型进行恒温下的分子动力学计算,然后对于该动力学结构模型再进行第一性原理计算,得到该温度下能带结构和介电常数等.通过改变分子动力学设定的温度,得到不同温度下材料微观结构的变化情况以及介电常数随温度的变化规律.作者分析了二氧化硅晶体微观结构和介电常数之间的关系,得到费米能量、禁带宽度和晶胞体积成反比关系的规律,建立了二氧化硅晶体介电常数和温度之间的关系.
谢小军 +4 more
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Gongye shui chuli, 2020 以地下水中NO3-为目标污染物，研究氯型季胺特种树脂（CQASR）对NO3-的吸附动力学与热力学。结果表明：离子交换过程在60 min时达到吸附平衡，吸附动力学可用准二级动力学模型较好拟合，离子交换过程主要受液膜扩散控制；吸附等温线可用Freundlich模型较好拟合，吸附热力学表明离子交换过程为自发吸热反应；离子选择性说明CQASR可作为地下水中NO3-去除专用树脂；FTIR分析发现CQASR树脂本身存在甲胺盐酸盐官能团，可能与树脂选择性去除NO3-有关。
由晗杨 +6 more
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Functional Ecology, Volume 40, Issue 7, Page 2068-2082, July 2026.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
wiley +1 more source
四川大学学报. 自然科学版, 2013 在凝聚相含能材料的反应过程中,反应体系往往需要高温高压的反应条件,且其中原子、分子的反应往往具有不同于气态分子的反应路径.因此,除需对体系分子的结构及电子性质进行计算分析外,还需对体系分子做反应动力学分析.本文采用ReaxFF分子动力学方法模拟了凝聚相下1,3,5-三氨基-2,4,6-三硝基苯(TATB)分子的初始反应过程,通过对分子产物随时间的分布、分子产物在不同时间段内的分布等分析,总结了其在反应初期的一些反应过程.结果显示,C-NO2键的断裂及质子转移为引起更复杂化学反应的初始反应.
王君, 郭峰, 程新路, 唐翠明
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Functional Ecology, Volume 40, Issue 7, Page 2128-2142, July 2026.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
wiley +1 more source
四川大学学报. 自然科学版, 1994 利用非线性量子自陷理论研究苯的特征能级庞小峰，游寿泉，游寿星（西南民族学院）（四川乐山教育学院）（四川大学）根据最近发展起来的非线性量子自陷理论可用来计算高分子和小分子振动能谱及其动力学特征￣［１～９］，我们利用分立的量子化自陷方程研究了苯（Ｃ＿６Ｈ...
庞小峰, 游寿泉, 游寿星
doaj
Methods in Ecology and Evolution, Volume 17, Issue 7, Page 2123-2134, July 2026.Abstract Elliptic Fourier analysis (EFA) is often employed in geometric morphometrics (GM), but the normalization of elliptic Fourier descriptor (EFD) has persistently posed challenges for obtaining unique and comparable results, especially in the application of outline‐based GM methods, which limits the implementation in automated analysis of numerous,
Hui Wu +6 more
wiley +1 more source
Dehydrogenation Thermodynamic and Kinetic Challenges of Mg‐Ni‐Based Alloy Hydrides
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Solid‐state hydrogen storage stands as a pivotal, safe, and efficient solution for the future hydrogen economy. Among diverse hydrogen storage systems, Mg‐Ni‐based alloy hydrides are recognized as cornerstone materials. However, their practical application is hindered by two core challenges: the high thermodynamic stability of the hydride ...
Jinglan He +6 more
wiley +1 more source