Results 21 to 30 of about 1,033,759 (150)
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Lignin hydrogenolysis is a promising route to separable aromatic monomers, yet practical upgrading is still hindered by macromolecular mass‐transfer limitations and the aggregation/deactivation of metal sites. Herein, we propose a “dual‐confinement” strategy to construct ultrafine Ru nanoclusters supported on lignin‐based N‐doped hierarchical ...
Tianjin Li +11 more
wiley +1 more source
Gongye shui chuli, 2011 采用静态实验方法对硫酸钙的结晶过程进行了研究，考察了温度、Ca2+和SO42-初始浓度、其他成垢离子及阻垢剂对硫酸钙结晶过程的影响。结果表明，升高温度会缩短硫酸钙结晶初期的“诱导期”，并增加晶体成核速率在结晶过程中的控制比重；Ca2+和SO42-初始浓度越大，硫酸钙结晶速度越快；HCO3-和 PO43-影响硫酸钙结晶过程的原 因在于溶液离子强度的变化使硫酸钙的溶度积发生改变； 阻垢剂对硫酸钙结晶的抑制作用主要以抑制晶体成核过程为主。
徐海, 郦和生, 王岽
doaj +2 more sources
Zhongguo shiyan zhenduanxue, 2022 目的 分析老年患者血管源性脑白质病变与血游离脂肪酸的相关性。方法 纳入2020年9月-2021年7月在吉林大学中日联谊医院南湖神经内科住院的脑小血管病患者194例,根据头MR显示的脑白质病变程度进行Fazekas评分,按照评分结果对纳入患者进行分级。收集患者的一般资料、低密度脂蛋白胆固醇、血同型半胱氨酸及血游离脂肪酸等数据。比较不同程度脑白质病变患者的一般资料及血游离脂肪酸。结果 (1)不同程度的脑白质病变患者在吸烟史、高血压病史、年龄、同型半胱氨酸、月桂酸、山嵛酸、花生酸、硬脂酸、二十二碳六烯酸 ...
doaj
Journal of Sociolinguistics, Volume 30, Issue 4, Page 452-465, September 2026.ABSTRACT This study investigates how ordinary Taiwanese netizens perform linguistic authority by policing others’ use of Mainland Chinese expressions in everyday online interactions not originally intended to be political and how such policing is subsequently supported, resisted, or (de)legitimized in the context of Taiwan–China relations. Three orders
Hsi‐Yao Su
wiley +1 more source
Shuitu Baochi Xuebao, 2007 各种试验土壤腐殖酸的紫外吸收曲线相似,但吸收峰强度和E 465/E 665值差异较大,腐殖酸的腐殖化程度由大至小排序为：紫色潮土HA〉黄壤HA〉中性紫色土HA〉酸性紫色土HA,说明它们组成相似,结构和性质有差异。在此基础上,研究它们对辛硫磷水解的影响。结果表明,不同来源土壤腐殖酸均阻碍辛硫磷的水解,但它们的影响程度有明显的差异。腐殖酸溶液浓度越大,辛硫磷水解速率越慢,相同腐殖酸浓度下以腐殖化程度较高的紫色潮土的作用最大。初步说明辛硫磷的水解速率与土壤腐殖酸的浓度和腐殖化程度有关。
魏沙平 +3 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The regeneration of osteoporotic bone defects is severely hampered by compromised endogenous healing capacity, demanding advanced strategies that actively orchestrate pro‐osteogenic microenvironments. Here, we report an integrated, self‐powered osteo‐regenerative system that uniquely leverages a dual ultrasound‐responsive piezoelectric ...
Bing Tan +6 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 以东乌珠穆沁旗的草原砂土为研究对象，采用正交试验设计的方法，研究了土壤/溶液（固/液）、初始汞浓度、溶液pH、腐殖酸、硝酸钠浓度对东乌珠穆沁旗草原砂土吸附HgCl2的影响。结果表明：固/液越小，初始汞浓度越大，土壤吸附能力越强；土壤对汞的吸附量随溶液pH，外源腐殖酸浓度，硝酸钠浓度的增大而呈现先增大后减小的趋势，当溶液pH为7.5，外源腐殖酸浓度为0.6 mg/g，硝酸钠浓度为0.08 mg/L时，土壤对汞的吸附量分别达到最大。影响砂土吸附HgCl2的因素大小依次为初始汞浓度 > 固/液 > pH ...
王道涵, 李泽龙, 汤家喜
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The design and synthesis of highly efficient electrochemical sensors are pivotal to electrochemical conversion technologies. This study successfully synthesized a composite material comprising two‐dimensional (2D) conductive MXene and nickel‐based metal–organic framework (Ni‐MOF) by stirring at room temperature.
Hai‐Xia Wu +8 more
wiley +1 more source
Dianci bileiqi, 2010 为了提高水泥胶合剂的强度,对硅酸盐水泥和硫铝酸盐水泥胶合剂进行了研究试验。结果表明:采用高标号早强PⅠ型硅酸盐水泥可提高胶合剂强度;在硅酸盐水泥胶合剂中加入适量的微集料,能明显提高胶合剂强度;硫铝酸盐水泥胶合剂在强度上比硅酸盐水泥胶合剂具有显著的优势,而且硫铝酸盐水泥体积膨胀率与硅酸盐水泥胶合剂相近,不存在后期强度倒缩现象,能够用于高强度绝缘子生产。
罗丽鹰, 蔡海龙
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT A facile coprecipitation‐pyrolysis strategy was employed to fabricate Cu/Co nanoparticles (NPs) embedded in nitrogen‐doped carbon matrices (Cu/Co@N‐C) through the carbonization of CuCo‐MOF precursors. Moreover, monometallic counterparts of Cu@N‐C and Co@N‐C were also prepared via carbonization of bimetallic CuZn‐MOF and CoZn‐MOF, respectively.
Weinan Yao +7 more
wiley +1 more source