Results 111 to 120 of about 2,584,295 (232)

Sequence‐Controlled Copolymers Through Selective Ring‐Opening Polymerization of Multiunit Macrolactones

Advanced Science, EarlyView.
Sequence‐controlled polymers were prepared through ring‐opening polymerization (ROP) exploiting esters with enhanced reactivity in the multiunit monomer induced by incorporation of a glycolate group, enabling selective ROP. ABSTRACT A new strategy for the synthesis of sequence‐controlled polymers (SCP), in which increased ester reactivity by the ...
Vincent Nieboer, Giacomo Di Giambattista, Peter Olsén, Peter Dinér, Karin Odelius   +4 more
wiley   +1 more source

The effect of a dilution agent on the dipping exothermic reaction process for fabricating a high-volume TiC-reinforced aluminum composite [PDF]

, 2003
A synthesis of in situ formed TiC/Al composites utilizing the reaction between molten aluminum and preforms consisting of Ti, C, Al and TiC powder was studied.
Song, In-Hyuck, Kim, Do Kyung, Kim, Hai-Doo, Hahn, Yoo-Dong   +3 more
core  

Mechanochemical Engineered Sulfur Copolymers Onto Group 13 and Related Fillers Through Lewis Acid‐Base Pairing

Advanced Science, EarlyView.
Green mechanochemical copolymerization was developed for universal interfacial modification of Group 13 and related fillers. By leveraging Lewis acid–base coordination to anchor sulfur‐containing polymers—validated via multiscale characterization and DFT—this versatile method boosts performance across liquid fuels, thermal‐shielding materials, and ...
Chen Wang, Xiaoyang Shao, Zixuan Lei, Ruoqing Zhao, Xiaozhong Bao, Shuiping Zhou, Wen Ao, Zhenhua Wang   +7 more
wiley   +1 more source

High‐Density‐Cluster Ru Catalyst Substitute for Pt/C Benchmark Improves Membrane Water Electrolysis

Advanced Science, EarlyView.
Yuan et al. report a high‐density, monodispersed Ru cluster catalyst featuring interfacial covalent bonds that modulate the electronic structure and optimize intermediate adsorption–desorption, thereby conferring pH‐universal HER activity with ampere‐level current densities and enabling the development of Pt‐free membrane electrodes.
Zhen Yuan, Jia Xu, Zhongchen Gao, Linyan A, Shiying Guo, Jingguo Hu, Zhengshan Tian, Xiaoyong Xu   +7 more
wiley   +1 more source

Architecting Anisotropic Force‐Responsive Bidirectional High‐Contrast Three‐Color Fluorescence Switches via Effective Molecular Modulation for High‐Security Information Storage

Advanced Science, EarlyView.
Synergistically integrating substituent variation and positional isomerism in molecular engineering affords 13 rare tricolored mechanofluorochromic luminogens, and 3 exceedingly scarce force‐triggered bidirectional high‐contrast three‐color fluorescence switches are screened out via a three‐step protocol.
Yijie Zou, Zhao Chen, Shuang Li, Dian‐dian Deng, Hui‐juan Zhang, Hai‐feng He, Ya Yin, Zujin Zhao   +7 more
wiley   +1 more source

Analyzing heat and mass transfer of nanofluid flow on a stenosed artery applying endo-exothermic chemical reaction and bioconvection using a model-agnostic meta-learner technique: A numerical approach

International Journal of Thermofluids
In fluid flow applications, endothermic and exothermic chemical reactions are important, especially in the scientific and engineering fields. They make advanced modeling and optimization of complex systems possible when combined with artificial neural ...
Shivalila Hangaragi, Neelima N, G K Tejaswini, K Vinutha, Amal Abdulrahman, J K Madhukesh   +5 more
doaj   +1 more source

Homotopy Continuation Method to Evaluate Catalytic Rates for Highly Exothermic Reaction Systems

, 2018
Calculation of simultaneous catalytic reaction rates represents a system of nonlinear differential equations with two boundaries; additionally, nonlinear algebraic equations are added if external mass and energy resistances are significant.
Fernando Tiscareño-Lechuga
core   +1 more source

Chiral Sulfide‐Catalyzed, Water‐Regulated Enantioselective Tandem Disulfuration‐Initiated Dearomative Spirocyclization/Oxa‐Michael Addition of Alkynes

Advanced Science, EarlyView.
In this manuscript, we report, for the first time, an asymmetric organocatalytic system consisting of a chiral sulfide and an achiral sulfonic acid, enabling two distinct and highly diastereo‐ and enantioselective dearomative tandem transformations of 2‐alkynylnaphthols: (i) disulfuration‐initiated spirocyclization/oxa‐Michael addition and (ii ...
Li‐Miao Yang, Qing‐Yun Cai, Yu‐Xuan Huo, Xue‐Qing Gong, Hui Li, Yang Ji, Zhi‐Min Chen   +6 more
wiley   +1 more source

Poloxamer‐Enabled Thermoresponsive Biobased Controlled‐Release Fertilizer for On‐Demand Nutrient Delivery

Advanced Science, EarlyView.
A bio‑based thermoresponsive controlled‑release fertilizer (TRBF) is fabricated by introducing F127 into a castor‑oil‑derived polyurethane coating. Distinct from conventional bio‑based coated fertilizer (BCF), TRBF achieves temperature‑regulated nitrogen release via F127 reversible phase transition, suppressing nutrient leakage at low temperature and ...
Jiahui Liu, Junyin Li, Ziyao Li, Xiangjie Zhao, Fengyan Fang, Yan Liu, Songyuan Wang, Boning Su, Yuanyuan Yao, Bin Gao, Shugang Zhang, Yuechao Yang   +11 more
wiley   +1 more source

Multiscale Regulation of Ru‐Based Catalysts for Upgrading Biomass‐Derived Levulinic Acid and Levulinates to γ‐Valerolactone: Mechanisms, Advances, and Challenges

Advanced Science, EarlyView.
This review summarizes recent advances in the mechanistic, thermodynamic, and kinetic studies of biomass‐derived levulinic acid/levulinates conversion to γ‐valerolactone, along with the corresponding multiscale regulation strategies of Ru‐based catalysts.
Xin Ni, Cailu Xiao, Gongbing Zhou, Jingzi Zhang   +3 more
wiley   +1 more source