检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

有机硅材料在化妆品中的应用研究进展

有机硅材料 2024年第5期38卷 90-95页

作者：许天月许子文王文瑞李维实梁龙宁波爱诗化妆品有限公司浙江余姚315400 中国科学院上海有机化学研究所上海200032

有机硅材料凭借良好的配方相容性、优异的上妆质感和抗晕染特性,已被广泛应用于化妆品行业,尤其在彩妆及毛发和面部护理等产品配方中发挥着不可或缺的作用。本文介绍了有机硅乳化剂、有机硅成膜剂、有机硅蜡、硅油和有机硅弹性体等在化... 详细信息

有机硅材料凭借良好的配方相容性、优异的上妆质感和抗晕染特性,已被广泛应用于化妆品行业,尤其在彩妆及毛发和面部护理等产品配方中发挥着不可或缺的作用。本文介绍了有机硅乳化剂、有机硅成膜剂、有机硅蜡、硅油和有机硅弹性体等在化妆品行业的应用研究进展,剖析了基于有机硅材料的化妆品配方体系的组成及原料合成路径,展望了化妆品用有机硅材料的未来发展趋势。

关键词：有机硅弹性体化妆品彩妆应用

在线全文

学校读者我要写书评

暂无评论

铁/硫共掺杂的石墨相氮化碳及其光催化性能

环境保护科学 2024年第3期50卷 71-81页

作者：梁龙陆帅帅刘亚男江芳陈欢南京理工大学环境与生物工程学院南京210094

文章以三聚氰胺、三聚硫氰酸和硝酸铁为原料,通过热聚合法制得铁/硫共掺杂的石墨相氮化碳(Fe/S-CN)催化剂。利用TEM、XRD、FT-IR、EIS等手段对聚合过程中间体和所得Fe/S-CN催化剂进行表征,结果表明三聚氰胺和三聚硫氰酸在热聚合过程中... 详细信息

文章以三聚氰胺、三聚硫氰酸和硝酸铁为原料,通过热聚合法制得铁/硫共掺杂的石墨相氮化碳(Fe/S-CN)催化剂。利用TEM、XRD、FT-IR、EIS等手段对聚合过程中间体和所得Fe/S-CN催化剂进行表征,结果表明三聚氰胺和三聚硫氰酸在热聚合过程中形成铁/硫掺杂的纳米薄层材料。以水中双酚A为目标污染物,考察Fe/S-CN的光催化性能,结果表明在模拟太阳光条件下,2%Fe/S-CN具有最好的污染物降解活性,光照3 h后20 mg/L双酚A的降解率可达92.8%,明显优于硫掺杂石墨相氮化碳和体相石墨相氮化碳。光电流和电化学阻抗的结果表明,铁/硫的掺杂提高了光生电子-空穴对的分离效率;EIS结果说明了金属修饰和非金属掺杂改善了载流子的传输性能,有利于载流子分离。自由基猝灭实验证实,光生空穴、单线态氧和超氧自由基是Fe/S-CN光催化双酚A氧化还原反应的主要活性物种。

关键词：石墨相氮化碳铁/硫共掺杂光催化双酚A

维普期刊数据库博看期刊

Dehydrogenation behavior and mechanism of LiAlH_(4) adding nano-CeO_(2)with different morphologies

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 9426-9434页

作者： Chunmin Zhang long liang Shaolei Zhao Zhijian Wu Shaohua Wang Dongming Yin Qingshuang Wang Limin Wang Chunli Wang Yong Cheng State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of China(USTC)Hefei 230023China National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China College of Life Science and Technology Changchun University of Science and TechnologyChangchun 130022China

Complex hydride LiAlH_(4),as a hydrogen storage material,possesses high theoretical hydrogen storage capacity(10.5 wt.%).However,highly efficient additives are urgently required to modify its thermal stability and sluggish *** additives exhibit unique morphology-dependent ***,the efficient rare earth oxide nano-CeO_(2)additives with different morphologies(nanoparticles,nanocubes,and nanorods)are prepared by the hydrothermal method,and the intrinsic properties are *** three different morphologies of nano-CeO_(2),which are different in the Ce^(3+)content and specific surface area,are added to LiAlH_(4)to improve the dehydrogenation *** LiAlH_(4)-CeO_(2)-nanorod composite exhibits the optimal dehydrogenation behavior,which begins to desorb hydrogen at 76.6℃ with a hydrogen capacity of 7.17 wt.%,and 3.83 wt.%hydrogen is desorbed within 30 min at 140℃.The dehydrogenation process of the composites demonstrates that hydrogen release is facilitated by the in-situ formed CeH_(2).73 and the facile transition between the oxidation states of Ce^(4+)and Ce^(3+).Combined with density functional theory calculations,the addition of nano-CeO_(2)can weaken the Al-H bond and accelerate the decomposition of[AlH_(4)]^(4-)tetrahedron,which is consistent with the reduction of the decomposition activation energy.

关键词： hydrogen storage LiAlH_(4) nano-CeO_(2) morphology

Causes of surface stripe cracks of Ti–4Al–2V alloy cold-rolled sheet

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2014年第5期33卷 522-526页

作者： De-Ming Huang Xiong-Fei Yang Qing-Feng Wei Yong Chen Hua Guo Sheng-long liang Ying Wang Pangang Group Research Institute Co. Ltd. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization

The stripe cracks which formed along rolling direction on the surface of Ti–4Al–2V alloy cold-rolled sheet were observed by stereoscope, scanning electron microscope（SEM）, and energy-dispersive spectrometer（EDS）. Morphology analysis indicates that cracks are dominantly in zigzag shape, with 10–30 mm in length and less than 10 lm in depth, and there is no evidence of crack tips. Chemical composition analysis shows that crack regions feather high oxygen concentration while smooth surface is at normal oxygen level. It is obvious that the occurrence of strip cracks is mainly related to residual oxide on the surface of Ti–4Al–2V alloy cold-rolled sheet.

关键词： Ti-4Al-2V Cold-rolled sheet Surface Stripe cracks

The fecal shield is a double-edged sword for larvae of a leaf beetle

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2023年第2期69卷 173-180页

作者： Zheng-Zhong Huang Ze-Qun Dong Zu-long liang Bin Zhang Huai-Jun Xue Si-Qin Ge Institute of Zoology Chinese Academy of SciencesBeijing 100101China College of Life Sciences The Key Laboratory of Zoological Systematics and Application of Hebei ProvinceHebei UniversityBaoding 071002China College of Life Science Institute of Life Science and Green DevelopmentHebei UniversityBaoding 071002China College of Life Sciences Nankai UniversityTianin 300071China

Larvae of some leaf beetles carry masses of feces covering parts or all of the body,which is called a"fecal shield'In general,the shield is thought to be a defense structure against natural ***,some studies have suggested that defense effectiveness varies depending on the natural *** this study,we used a fecal retention leaf beetle Ophrida xanthospilota(Coleoptera:Chrysomelidae),and 2 local generalist predators(an ant,Camponotus japonicus(Hymenoptera:Formicidae)and a stinkbug,Arma custos(Hemiptera:Pentatomidael)as a system to test the hypothesis that the fecal shield of *** plays different roles in predation behavior of different predators and can provide multiple chemical communication signals in predator-prey *** bioassays showed that the fecal shield of *** larvae repelled the ant *** while attracting the stinkbug *** results also strongly demonstrated that hexane extracts of the fecal shield significantly repelled ***,while dichloromethane(DCM)extracts did not inhibit ant ***,DCM extracts attracted ***,but hexane extracts did ***,we suggest that the fecal shield is a double-edged sword for the larvae of *** results also indicated that the risk-benefit tradeoff of an insect should be estimated at a community level involving multiple enemies(predators and parasites)and herbivores,rather than in a single prey-predator pair.

关键词： ant chemical cues kairomone predatory stinkbug predator-prey interactions

Ginsenoside Rg5 enhances the radiosensitivity of lung adenocarcinoma via reducing HSP90-CDC37 interaction and promoting client protein degradation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2023年第11期13卷 1296-1308页

作者： Hansong Bai Jiahua Lyu Xinyu Nie Hao Kuang long liang Hongyuan Jia Shijie Zhou Churong Li Tao Li Sichuan Cancer Hospital Institute Sichuan Cancer CenterSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengdu610041China School of Medicine University of Electronic Science and Technology of ChinaChengdu610054China School of Clinical Medicine Southwest Medical UniversityLuzhouSichuan646000China State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy West China HospitalSichuan UniversityChengdu610041China

Ginsenoside Rg5 is a rare ginsenoside showing promising tumor-suppressive *** study aimed to explore its radio-sensitizing effects and the underlying *** lung adenocarcinoma cell lines A549 and Calu-3 were used for in vitro and in vivo *** molecular docking prediction and following validation by surface plasmon resonance(SPR)technology,cellular thermal shift assay(CETSA),and isothermal titration calorimetry(ITC)were conducted to explore the binding between ginsenoside Rg5 and 90 kD heat shock protein alpha(HSP90a).The effects of ginsenoside Rg5 on HSP90-cell division cycle 37(CDC37)interaction,the client protein stability,and the downstream regulations were further *** showed that ginsenoside Rg5 could induce cell-cycle arrest at the G1 phase and enhance irradiationinduced cell *** could bind to HSP90a with a high affinity,but the affinity was drastically decreased by HSP90a Y61A ***-immunoprecipitation(Co-IP)and ITC assays confirmed that ginsenoside Rg5 disrupts the HSP90-CDC37 interaction in a dose-dependent *** reduced irradiation-induced upregulation of the HSP90-CDC37 client proteins,including SRC,CDK4,RAF1,and ULK1 in A549 cell-derived xenograft(CDX)*** Rg5 or MRT67307(an IKKε/TBK1 inhibitor)pretreatment suppressed irradiation-induced elevation of the LC3-II/b ratio and restored irradiation-induced downregulation of p62 *** A549 CDX tumors,ginsenoside Rg5 treatment suppressed LC3 expression and enhanced irradiation-induced DNA *** conclusion,ginsenoside Rg5 may be a potential radiosensitizer for lung *** interacts with HSP90a and reduces the binding between HSP90 and CDC37,thereby increasing the ubiquitin-mediated proteasomal degradation of the HSP90-CDC37 client proteins.

关键词： Ginsenoside Rg5 Lung adenocarcinoma Radiotherapy HSP90 CDC37

Physics-based seismic analysis of ancient wood structure:fault-to-structure simulation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2024年第3期23卷 727-740页

作者： Ba Zhenning Fu Jisai Wang Fangbo liang Jianwen Zhang Bin Zhang long State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation (Tianjin University)Tianjin 300350China School of Civil Engineering Tianjin UniversityTianjin 300350China Administrative Office of the Summer Palace Beijing 100091China School of Architecture Tianjin UniversityTianjin 300072China

Based on the domain reduction method,this study employs an SEM-FEM hybrid workflow which integrates the advantages of the spectral element method(SEM)for flexible and highly efficient simulation of seismic wave propagation in a three-dimensional(3D)regional-scale geophysics model and the finite element method(FEM)for fine simulation of structural response including soil-structure interaction,and performs a physics-based simulation from initial fault rupture on an ancient wood *** verification of the hybrid workflow,a large-scale model of an ancient wood structure in the Beijing area,The Tower of Buddhist Incense,is established and its responses under the 1665 Tongxian earthquake and the 1730 Yiheyuan earthquake are *** results from the simulated ground motion and seismic response of the wood structure under the two earthquakes demonstrate that this hybrid workflow can be employed to efficiently provide insight into the relationships between geophysical parameters and the structural response,and is of great significance toward accurate input for seismic simulation of structures under specific site and fault conditions.

关键词： spectral element method finite element method fault-to-structure simulation physical model domain reduction method

激光辅助氩弧焊技术在不锈钢焊接中的应用研究

在线全文

学校读者我要写书评

暂无评论

全面腐蚀控制 2024年第9期38卷 159-162页

作者：何毅利童敏马强龙国梁狄国梅兰州真空设备有限责任公司甘肃兰州730050

激光辅助氩弧焊接技术是一种新兴的高效焊接方法,通过激光与电弧的复合作用,可显著提升焊接效率和接头质量。该技术在不锈钢焊接领域展现出广阔的应用前景。本文针对激光辅助氩弧焊在不同类型不锈钢中的应用进行了系统探讨,旨在为推动... 详细信息

激光辅助氩弧焊接技术是一种新兴的高效焊接方法,通过激光与电弧的复合作用,可显著提升焊接效率和接头质量。该技术在不锈钢焊接领域展现出广阔的应用前景。本文针对激光辅助氩弧焊在不同类型不锈钢中的应用进行了系统探讨,旨在为推动该技术在不锈钢焊接领域的工程应用提供理论指导和技术支撑。

关键词：激光辅助氩弧焊接不锈钢焊接

Non-neuronal muscarinic receptor activation prevents apoptosis of endothelial cells induced by homocysteine

在线全文

学校读者我要写书评

暂无评论

中国应用生理学杂志 2013年第6期29卷 565-572页

作者： Jun LI Chao-liang long Zhi-yuan PAN Yuan-yuan ZHANG Hai WANG Cardiovascular Drug Research Center Institute of Health and Environmental Medicine Academy of Military Medical Sciences

Objective Endothelial apoptosis plays an important role in the initiation of atherosclerosis. It would be useful to clarify whether activation of non-neuronal muscarinic receptor(NNMR) could prevent endothelial apoptosis and atherosclerosis. We investigated the effects of NNMR activation on regulating rat aortic endothelial cells(RAECs) apoptosis induced by homocysteine, an independent risk factor of atherosclerosis, and further studied its molecular mechanism. Methods RAECs were incubated using homocysteine at the concentration of 2.7 mmol/L for 36 h. RAECs were also pre-treated with carbachol or arecoline to examine their effects. RT-PCR was used to assess changes in the gene expression related to cell apoptosis. Results Incubation of RAECs with homocysteine at the concentration of 2.7 mmol/L resulted in morphologic changes, such as cellular shrinkage, membrane blebbing, chromatin condensation and margination. These could be attenuated by pretreatment with carbachol and arecoline at the concentration of 10 μmol/L for 12 h. Homocysteine induced apoptosis in RAECs and the molecular mechanisms were associated with the regulation of fas, fas-L and caspase-8 in the death receptor pathway, bcl-2, bcl-xL and bax in the mitochondrial pathway, caspase-12 in the endoplasmic reticulum pathway and caspase-3, caspase-6 and p53 as downstream effectors. Carbachol and arecoline attenuated the effects of homocysteine on genes in the death receptor pathway, in the mitochondrial pathway and in the downstream pathway. Atropine could reverse all of the effects of arecoline. Conclusion Activation of NNMR by carbacol and arecoline inhibits homocysteine-induced endothelial cell apoptosis mainly through regulation of death receptor pathway, mitochondrial pathway and downstream effectors.

关键词：同型半胱氨酸细胞凋亡毒蕈碱受体血管内皮诱导活化神经细胞动脉粥样硬化