Results 31 to 40 of about 22,086 (119)
New Phytologist, EarlyView.Biosynthesis and accumulation of tanshinones in the periderm of Salvia miltiorrhiza during secondary root growth. Summary Perennial herbs develop long‐lived roots that undergo repeated cycles of secondary growth, during which the periderm functions as a protective barrier and a major site of specialized metabolite accumulation.
Licheng Liu +19 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2002 目的 证实西比灵对急性脑梗死患者血清中自由基的影响。方法 选取急性脑梗死患者 ,随机分为一般治疗组、自由基清除剂治疗组、西比灵治疗组、自由基清除剂加西比灵治疗组 ,对各组患者于治疗前后进行疗效评定 ,于治疗前、治疗后 3、7、15d分别采静脉血 ,应用WSPS法测定LPO含量 ,化学发光法测定SOD活性。结果 西比灵治疗组LPO含量降低 ,SOD活性稳定 ,自由基清除剂加西比灵组LPO含量降低更加明显。结论 西比灵可抑制脑梗死患者脑组织内自由基的生成 ,与自由基清除剂联合应用疗效更加显著 ...
刘松岩 +4 more
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Gongye shui chuli, 2020 随着环境污染日益严重，各种形式的高级氧化技术逐渐发展起来。其中活化过硫酸盐高级氧化技术由于原料易得，效果显著等优点颇受人们关注。过硫酸盐活化主要产生硫酸根自由基和羟基自由基两种高活性自由基，能够有效去除难降解有机污染物。阐述了过硫酸盐活化体系中两种主要活性自由基的特点及其与有机物的反应机理；综述了活化过硫酸盐的不同方式，做了各种活化方法的技术经济优劣性分析，并对存在问题进行了分析和展望。
米记茹 +6 more
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AI foundation models in plant biology
New Phytologist, EarlyView.Foundation models decode genomes, engineer proteins, phenotype crops, and drive AI agents across plant biology. This figure was created in BioRender (BioRender.com/xcmmkel). Summary Rapid technological progress has enabled plant biologists to accumulate unprecedented volumes of multi‐scale, multi‐modal data, yet this abundance of data has intensified ...
Haopeng Yu
wiley +1 more source
四川大学学报. 自然科学版, 2015 利用溶血与凝聚检查法检测见血青总皂苷体外溶血活性,以及用DPPH自由基法、水杨酸法、邻苯三酚自氧化法研究其体外抗氧化活性.实验结果显示:总皂苷在0.12～0.6mg/mL范围内未表现出溶血作用,但出现了红细胞凝聚现象;对DPPH自由基的清除率与BHT相当,其IC50值为0.17mg/mL;对羟自由基、超氧阴离子自由基的清除率较Vc弱,且在0.025～0.475mg/mL浓度范围内变化不大.
曾春菡, 刘小波, 曹弈璘, 王丽
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Emotion and the Advocacy Coalition Framework: An Affective Dynamics Perspective
Policy Studies Journal, Volume 54, Issue 3, August 2026.ABSTRACT Despite extensive evidence that emotion and cognition are deeply intertwined, the Advocacy Coalition Framework (ACF) lacks an analytically independent emotional mechanism in its causal architecture—an omission that may be particularly consequential in policy subsystems structured around morally charged, identity‐laden policy disputes.
Moshe Maor
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT The construction of core–shell grains can enhance the coercivity of Nd2Fe14B magnets. However, it is a significant challenge to elucidate the formation of these core–shell grains particularly regarding the spontaneous core–shell structure in Y‐substituted Nd2Fe14B alloys.
Sining Fan +13 more
wiley +1 more source
自由基捕捉剂结构对
Fushe yanjiu yu fushe gongyi xuebao探究了N，N-二仲丁基对苯二胺（44PD）、特丁基对苯二酚（TBHQ）、二硫化二异丙基黄原酸酯（DIP）三类自由基捕捉剂对γ射线辐照作用下乙烯-醋酸乙烯共聚物（EVA）结构演化与性能变化行为的影响。热重分析（TGA）结果表明，三类自由基捕捉剂可抑制较高吸收剂量下EVA中聚乙烯链段的裂解。凝胶含量及应力松弛测试结果表明，三类自由基捕捉剂均可抑制EVA内部交联结构的构筑，其中，胺类抗氧剂44PD的抑制效果相对不明显，但吸收剂量较高时，含自由基捕捉剂的EVA，其交联结构较为完善，应力松弛速率较低 ...
胡 心芸 +6 more
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Gongye shui chuli, 2022 为获得低成本、高效率的偶氮染料废水处理方法，采用改性活性炭催化过硫酸盐（PS）氧化降解甲基橙染料废水。通过单因素实验分别研究改性活性炭、PS及Fe2+浓度对甲基橙降解的影响，降解过程遵循拟一级动力学模型，反应速率常数为0.075 7~1.717 8 min-1。采用Box-Behnken Design响应面研究各因素及其交互作用对甲基橙降解的影响，各因素贡献排序为：催化剂投加量>PS浓度>Fe2+浓度，最佳反应条件：催化剂投加量为0.73 g/L、PS浓度为2.0 mmol/L、Fe2 ...
赵娟娟 +6 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Biodegradable zinc (Zn)‐based materials are considered promising candidates for orthopedic applications because of their favorable mechanical properties, controllable biodegradability, and good biosafety profiles. However, their clinical translation is limited by early‐stage corrosion‐induced cytotoxicity and inflammation, as well as ...
Jinlong Mao +9 more
wiley +1 more source