Results 31 to 40 of about 22,415 (117)
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li +8 more
wiley +1 more source
胰岛素样生长因子1对于实验性动脉粥样硬化斑块细胞组织结构的影响
Zhongguo shiyan zhenduanxue, 2013 目的探讨应用胰岛素生长因子1（IGF-1）对于动脉粥样硬化斑块平滑肌细胞的影响,为其应用于控制斑块易损性提供理论依据。方法雄性新西兰大白兔18只,随机分为3组,每组6只,分别为模型组、IGF-1干预组、辛伐他汀干预组。制作动脉粥样硬化模型。处死后解剖分离腹主动脉斑块标本,组织染色测量斑块纤维帽厚度及纤维帽的厚度与脂核横截面厚度的比值;免疫组化测量斑块平滑肌细胞含量,进行统计学分析。结果 IGF-1组与模型组比较,在斑块肩部及顶部,两者差异有统计学意义;辛伐他汀组与模型组比较,二者差异有统计学意义 ...
刘洋, 许金鹏, 刘福林
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Magnesium (Mg)‐based composites are regarded as promising lightweight materials with significant potential for structural applications. The structure–property relationships of bionic Mg‐based composites remain unclear. Herein, three honeycomb‐like Mg‐Fe composites are fabricated to uncover the underlying strengthening mechanisms.
Fan Zhang +5 more
wiley +1 more source
Shuitu Baochi Xuebao目的研究寒温带天然次生林土壤微生物生物量及其化学计量特征，分析纯林及其混交林树种互作对土壤微生物生物量的改变，为天然次生林土壤碳氮磷养分利用机制和养分循环研究提供参考。方法以寒温带白桦林、山杨林和白桦-山杨混交林（简称混交林）为研究对象，在每种林型内选择典型地段设置3块20 m×30 m的样地，在每个样地内，按照“S”形设置5个采样点，于2024年5—9月采集0~5、5~10、10~20 cm土层土壤样品，采用改进的氯仿熏蒸法测定土壤微生物生物量碳（Cmic）、氮（Nmic）、磷（Pmic）质量分数 ...
庞月健 +3 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The inherent brittleness of hardmetals stems from the rigid covalent bond in the ceramic matrix and the sharp ceramic/metal interface, which restricts the nucleation and motion of dislocations. In this study, a novel strategy is proposed to activate significant dislocation behaviors in the WC matrix by employing a non‐equiatomic CoNiFeCr ...
Cheng Qian +9 more
wiley +1 more source
福州市不同种植年限茉莉花园土壤碳、氮、磷及生态化学计量比特征
Shuitu Baochi Xuebao, 2022 为了阐明种植年限对茉莉花园土壤碳(C)、氮(N)、磷(P)及其生态化学计量特征的影响, 以福州市种植年限约为3(J-3), 10(J-10), 15(J-15), 30(J-30), >40(J-40)年的茉莉花园为研究对象, 对土壤C、N、P与生态化学计量比及其影响因子进行了测定与分析。结果表明: (1)与J-3相比, 随着种植年限的增加J-10、J-30、J-40土壤容重显著下降29%, 19%和18%(P < 0.05), J-10、J-15、J-30、J-40土壤黏粒含量分别显著降低26 ...
黑杰 +10 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT NASICON‐type Na4VMn(PO4)3 (NVMP) is a promising high‐capacity cathode for sodium‐ion batteries, yet its practical deployment is hindered by Mn3+‐driven lattice distortion, persistent oxygen vacancy defects, and sluggish Na+ transport, collectively resulting in accelerated performance degradation.
Deyi Zhang +10 more
wiley +1 more source
Shuitu Baochi Xuebao, 2023 为揭示不同固沙林模式恢复过程中主要养分含量变化关系与差异特征。以榆林毛乌素沙区半固定沙地以及恢复25~56年的人工灌木和乔木林地为对象,测定和分析从枯落物层到腐殖质层,再到矿质土层碳(C)、氮(N)、磷(P)含量及其化学计量比随恢复年限和连续体剖面的动态变化特征及相关关系。结果表明:不同恢复年限2种林地C、N、P含量及其化学计量均表现为枯落物层＞腐殖质层＞矿质土层。但随林地恢复年限延长,2种林地枯落物、腐殖质及矿质土层C含量均显著增加,到恢复56年时,分别比半固定沙地平均增加1.76,35.70,6 ...
杨京 +6 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Efficient catalytic materials are vital for addressing the polysulfide shuttle and sluggish redox kinetics in lithium–sulfur batteries. Herein, we report a facile sugar‐blowing method to prepare porous carbon‐supported FeCoNiCuPt high‐entropy alloy (HEA) nanospheres with abundant lattice defects in a single crystalline phase.
Guixiang Zhong +8 more
wiley +1 more source
Gongye shui chuli, 2021 蛋壳粉对废水中铅和镉的吸附符合Langmuir吸附等温式和拟二级吸附动力学模型，且无明显解吸特征。基于此特征开发出强化吸附工艺，建立了可计算出水浓度的强化吸附数学模型，并进行了实验验证。当铅和镉的初始质量浓度为10 mg/L，经强化吸附后，铅和镉出水平均质量浓度分别为0.88 mg/L和0.98 mg/L，且实验值与模型计算值吻合良好。相比于传统吸附，铅和镉的出水平均质量浓度可分别降低14.54%和44.58%。
邱磊, 丁珣, 韩非
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