Results 21 to 30 of about 3,697 (118)
Harnessing social media data to track species range shifts
Conservation Biology, EarlyView.Abstract Biodiversity monitoring programs and citizen science data remain heavily biased toward the Global North. Especially in megadiverse countries with limited biodiversity records, incorporating social media data can help address existing data gaps.
Shawan Chowdhury +15 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The rapid advancement of 5G communication technology has intensified electromagnetic pollution, creating an urgent demand for flexible multifunctional fabrics with efficient electromagnetic interference (EMI) shielding performance. This study proposes a novel material‐stacked construction strategy to fabricate multifunctional MXene/cellulose ...
Zong‐Kai Yan +9 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT High‐power piezoelectric ceramics which have a wide operating temperature range are essential for sensor and actuator applications in extreme conditions. However, their development is fundamentally hindered by the inherent trade‐off among key parameters (TC, d33, Qm).
Rui Yan +10 more
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不同剂量氯吡格雷对急性脑梗死患者神经功能及预后不良事件的影响 [PDF]
, 2019 目的探讨不同剂量氯吡格雷治疗急性脑梗死(CI)患者的效果及安全性。方法选取86例急性CI住院患者,采用简单随机分组法分为大剂量组(n=43)与小剂量组(n=43)。在常规对症治疗基础上,大剂量组给予氯吡格雷150 mg,小剂量组给予氯吡格雷常规剂量75 mg,均持续治疗3个月。比较2组治疗前后血小板计数、血小板聚集率、美国国立卫生研究院卒中量表(NIHSS)评分、预后不良事件发生情况。结果大剂量组治疗后血小板计数、血小板聚集率、NIHSS评分均较治疗前显著下降(P 0.05)。大剂量组神经功能恶化率4.
张旭, 蔡海明, 郑燕红
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Religious uses shape the selection and distribution of Chinese Buddhist tree species
People and Nature, Volume 7, Issue 9, Page 2094-2105, September 2025.Abstract As a widely disseminated world religion, Buddhism's selection of religious species may profoundly impact candidate species distribution. This study sampled 246 Chinese temples covering diverse regions to investigate the selection modes of Buddhist tree species (BTS) and the alien religion's influence on Chinese indigenous biodiversity and ...
Cheng Jin +8 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2004 目的研究亚低温状态下,大鼠急性脑缺血时氧自由基超氧化物歧化酶（SOD）和一氧化氮（NO）、一氧化氮合酶（NOS）的改变,探讨亚低温对缺血脑组织的保护机制。方法将45只Wistar大鼠随机分为9组,假手术组5只,缺血组及亚低温组又根据缺血、亚低温时间不同分为3h、24h、48h、72h亚组（各组均为5只）。动物模型参照Longa、Koizumi和刘亢丁等人的方法,采用颈内动脉线栓法制备大脑中动脉闭塞（MCAO）模型。结果比较缺血组和亚低温组,可见亚低温组栓塞侧脑组织SOD的生成和释放明显增加 ...
孙宏霞, 付铁娟, 刘亢丁
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亚临界低温萃取小米糠油的工艺条件优化Process optimization of subcritical low-temperature extraction of millet bran oil
Zhongguo youzhi旨在促进小米糠资源利用，采用亚临界低温萃取技术提取小米糠油，通过单因素试验考察了萃取时间、萃取温度、料液比对小米糠提油率的影响，并在此基础上以小米糠提油率为指标，运用响应面试验对亚临界低温萃取小米糠油的工艺条件进行优化。结果表明：亚临界低温萃取小米糠油的最佳工艺条件为萃取时间25 min、萃取温度35 ℃、料液比1∶ 4，在此条件下小米糠的提油率为95.3%。综上，该工艺可用于小米糠油的有效提取。 Aiming to promote the utilization of millet bran ...
李俊超1，秦学磊1，蔡佳峻2，任春明3，刘梁3 LI Junchao1, QIN Xuelei1, CAI Jiajun2, REN Chunming3, LIU Liang3
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邻苯二甲酰亚胺钾催化合成生物柴油Synthesis of biodiesel catalyzed by potassium phthalimide
Zhongguo youzhi, 2022 针对酯交换法合成生物柴油中均相催化剂不容易分离和非均相催化剂易失活和用量大等问题，提出用邻苯二甲酰亚胺钾催化大豆油和甲醇合成生物柴油。通过单因素实验考察了催化剂邻苯二甲酰亚胺钾用量、醇油摩尔比、反应温度和反应时间对甘油三酯转化率的影响，并利用Design-Expert软件通过响应面实验对合成反应条件进行了优化。考察了邻苯二甲酰亚胺钾在甘油和甲醇中的溶解度和作为催化剂的重复使用性能。通过红外光谱和气相色谱-质谱对生物柴油的结构和组成进行了分析。结果表明：合成生物柴油的最佳反应条件为反应温度60 ...
韩桂强，杨帅，冯树波 HAN Guiqiang，YANG Shuai，FENG Shubo
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Functional Ecology, Volume 39, Issue 2, Page 635-652, February 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Invasive plants are a major cause of the global biodiversity crisis; it is therefore crucial to understand mechanisms that contribute to their success. South‐western Australia is a global biodiversity hotspot with extremely low soil phosphorus (P) concentrations.
Dan Tang +7 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2009 目的研究亚低温状态下,大鼠急性脑缺血时氧自由基—超氧化物歧化酶（SOD）和一氧化氮（NO）、一氧化氮合酶（NOS）的改变,探讨亚低温对缺血脑组织的保护机制。方法将45只Wistar大鼠随机分为9组,假手术组5只,缺血组及亚低温组又根据缺血、亚低温时间不同分为:3 h2、4 h4、8 h7、2 h亚组（各组均为5只）。采用颈内动脉线栓法制备大鼠大脑中动脉闭塞（MCAO）模型。结果比较缺血组和亚低温组,可见亚低温组栓塞侧脑组织超氧化物歧化酶（SOD）的生成和释放明显增加;亚低温组血清中一氧化氮（NO ...
林淑香 +3 more
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