Results 71 to 80 of about 177,820 (273)
油酸直接马来酸化制备C22 -三元羧酸Preparation of C22-tricarboxylic acid by Maleinisation of oleic acid
Zhongguo youzhi, 2023 为解决C22-三元羧酸合成过程中均相催化剂残留、原料价格较高等问题，以油酸为原料，在路易斯酸催化下与马来酸酐进行Alder-ene加成反应，水解后得到C22-三元羧酸。对C22-三元羧酸的合成条件进行优化并对产物进行了鉴定；制备C22-三元酸钠表面活性剂并研究其表面性能。结果表明：C22-三元羧酸合成的最佳条件为以FePO4为催化剂、催化剂用量3%（以油酸物质的量计）、马来酸酐与油酸物质的量比3∶ 1、反应温度180 ℃、反应时间10 h，在此条件下C22-三元羧酸产率达到78%，油酸转化率为77.4%；
陈治家，赵杰，张铭远，邓林江，钮腾飞 CHEN Zhijia，ZHAO Jie，ZHANG Mingyuan，DENG Linjiang，NIU Tengfei
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Advanced Materials, EarlyView.Residual magnetization induces pronounced mechanical anisotropy in ultra‐soft magnetorheological elastomers, shaping deformation and actuation even without external magnetic fields. This study introduces a computational‐experimental framework integrating magneto‐mechanical coupling into topology optimization for designing soft magnetic actuators with ...
Carlos Perez‐Garcia +3 more
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Advanced Materials, EarlyView.Ferroelectric Hf0.5Zr0.5O2 epitaxial thin films exhibit a non‐volatile, electrically controlled thermal conductivity enabled by the coupling between oxygen vacancy migration, acting as phonon scatterers, and ferroelectric polarization, acting as ion migration valve.
Dídac Barneo +13 more
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El Trimestre Económico, 2018 Antecedentes: Se ha documentado que la persistencia de la inflación en México ha experimentado un comportamiento inestable a lo largo del tiempo en la distribución de la media condicional.
Marco A. Acosta
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Advanced Science, EarlyView.Cer24:1 levels are reduced in neutrophilic asthma and inversely correlate with disease severity and airway neutrophilia. Restoring Cer24:1 suppresses pathogenic Th17 differentiation by engaging EP2 on CD4+ T cells, thereby dampening the JAK2–STAT3–RORγt axis and reducing IL‐17 production.
Huan Liu +11 more
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The interrelationship between media reports and the recession in Croatia
Croatian Review of Economic, Business and Social Statistics, 2017 This paper builds upon the Economist’s R-word (recession) index by forming a Croatian version of a media news-based economic uncertainty measure. Using the web archives of the four major Croatian news portals (Index.hr, Jutarnji list, Večernji list and ...
Čižmešija Mirjana +2 more
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Market risk, value-at-risk and exponential weighting
Economics and Business Review, 2022 Banks and financial intermediaries are exposed to market risk. The aim of the paper is to explore the implications of legal requirements on market risk valuation. The focus is on the calculation of the permissible weighting factor of the concept of value-
Broll Udo, Förster Andreas
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Alignment of nematic liquid crystals on mixed Langmuir-Blodgett mono-layers
, 1997 Mono-layers of stearic and behenic acids and mixtures of them in different proportions, deposited with the Langmuir-Blodgett technique, were used to study the alignment and the alignment dynamics in nematic liquid crystal cells. A relaxation process from
Durkam +5 more
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A Renal Clearable Probe for In Vivo Monoamine Oxidase (MAO) Detection
Advanced Science, EarlyView.A renal‐clearable Cy7‐based fluorogenic probe enables rapid and non‐invasive detection of monoamine oxidase (MAO) activity in vivo. Upon MAO‐mediated activation, the fluorescent product is efficiently excreted in urine, allowing direct quantification of enzyme overexpression.
Marcia Domínguez +13 more
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MCMC and GLMs for estimating regression parameters: Evidence from non-life Egyptian insurance sector [PDF]
Journal of Humanities and Applied Social Sciences, 2019 Purpose – The purpose of this study is to estimate the linear regression parameters using two alternative techniques. First technique is to apply the generalized linear model (GLM) and the second technique is the Markov Chain Monte Carlo (MCMC) method ...
Mahmoud ELsayed, Amr Soliman
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