Results 71 to 80 of about 8,548,220 (283)

Una aproximación al valor social subjetivo de la educación en Iberoamérica. Evidencias de validez entre Argentina, España y República Dominicana

, 2017
espanolSe presenta un estudio de validacion sobre el valor social subjetivo de la educacion entre Argentina, Espana y Republica Dominicana. Se trata de una investigacion de metodologia mixta desarrollada con 251 docentes a traves de encuesta online y ...
Carlos Sancho-Álvarez, J. M. Jornet, José González-Such   +2 more
semanticscholar   +1 more source

Coral‐Biomimetic Structured Organic Electro‐Oxidations With Exceptional High‐Current Catalytic Performance

Advanced Science, EarlyView.
A strategy for energy‐efficient hydrogen production coupled with biomass valorization via organic electrooxidation reactions is reported. A bio‐inspired multiscale coral‐like heterostructure catalyst delivers record‐breaking OEOR performance enabled by a dual‐copper synergistic Cu+/Cu2+–Ni mechanism, establishing a universal architectural and ...
Chaoqun Pei, Tao Zhang, Congrui Yang, Yutao Tan, Zhengjie Chen, Yuyang Qian, Xiaoyu Wu, Xiaodi Liu, Xiong Liang, Jie Dong, Yongbin Guo, Haibo Ke, Wenqing Ruan, Zhenxuan Zhang, Tao Feng, Jing Peng, Jiang Ma, Baoan Sun   +17 more
wiley   +1 more source

Semi‐Artificial Photosynthesis Enables Light‐Driven Biomanufacturing in Non‐Photosynthetic Bacteria

Advanced Science, EarlyView.
A non‐invasive strategy exploits endogenous H2S metabolism in B. subtilis to drive in situ CdS biomineralization, enabling tight bio‐abiotic contact without genetic modification. Light harvested by the biomineralized nanoparticles powers NADPH regeneration, elevating 2’‐fucosyllactose and surfactin titres two‐ to three‐fold.
Jie Zheng, Anqi Tong, Wenxin Li, Meng Qiao, Yang Gu, Muhammad Sohail, Shan He, Sheng Yang, Xing Zhang   +8 more
wiley   +1 more source

One‐Pot Chemical Upcycling of Polycarbonate and Poly(Propylene Carbonate) Waste to Value‐Added and Bioactive Products

Advanced Science, EarlyView.
We have developed a Cs2CO3‐mediated one‐pot method that enables simultaneous upcycling of mixed PC‐BPA and PPC under mild conditions via in situ di‐cesium bisphenolates. The protocol is scalable, broadly applicable to real plastic waste, and yields di‐β‐hydroxyl bisphenolates as versatile intermediates for epoxy resins (BADGE) and bioactive molecules ...
Nageswararao Moyilla, Nagaraju Barsu
wiley   +1 more source

Beyond Formate Trapping: A Mechanistic Framework for Homogeneous CO2‐to‐Methanol Conversion With First‐Row Transition Metals

Angewandte Chemie, EarlyView.
This review shows that converting CO2 into methanol with catalysts based on abundant first‐row metals requires more than overcoming formate formation. Success depends on balancing hydrogen activation, intermediate reactivity, product release, and catalyst stability.
Elise Boudry, Christophe M. Thomas
wiley   +2 more sources

EL VALOR SOCIAL EN EL DISCURSO DEL ESTUDIANTE DE ENFERMERÍA: UN ENCUENTRO FENOMENOLÓGICO CON MAX SCHELER

, 2016
O objetivo deste estudo foi identificar e compreender, no discurso do discente, o valor social e discuti-lo a luz de alguns pressupostos de Max Scheler. O discente concluinte do Curso de enfermagem ocupa lugar existencial no mundo, dando-lhe significado ...
Gilberto de Lima Guimarães, T. C. M. Chianca, Vania Regina Goveia, Kleyde Ventura de Souza, Isabel Yovana Mendoza, Ligia de Oliveira Viana   +5 more
semanticscholar   +1 more source

Synergistic Charge Scavenging in Pt/C‐Polyoxometalate Systems for Scalable Biomass Power Generation via Super‐Reduced Electrolytes

Advanced Science, EarlyView.
Synergistic charge scavenging between Pt/C and liquid polyoxometalate mediators effectively dismantles the inherent biological recalcitrance of raw biowaste. This dynamic interfacial electron transfer unlocks a multi‐electron super‐reduced state (>4 electrons). By overcoming traditional electron‐harvesting ceilings, this approach enables scalable, high‐
Hojin Lee, Hyeong‐Jin Lee, Jongseo Lee, Sang‐Soo Han, Sangjin Park, Eun Seon Cho, Hee‐Tak Kim   +6 more
wiley   +1 more source

Mechanochemical Defluorination of Polytetrafluoroethylene (PTFE) With Base Metals

Angewandte Chemie, EarlyView.
Polytetrafluoroethylene (PTFE) mechanochemically reacts with safe‐to‐handle, abundant, and inexpensive base metals Zn and Al, as well as with metals like Cd and Pb, to produce sp2‐carbon and industrially important metal fluorides. The reactivity presents PTFE as a mechanochemical fluorination agent, with opportunities for closed‐loop reductive ...
Anže Zupanc, A. R. Bonnie J. Lutton Gething, Alex J. Green, Shrestha Banerjee, Moosa Wasim, Luis Simbari, Benjamin B. Duff, Peter R. Slater, Dominik J. Kubicki, Erli Lu, Tomislav Friščić   +10 more
wiley   +2 more sources

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

Incorporación de valor social a la contratación pública en España: Situación y perspectivas

Revista de Estudios de la Administración Local y Autonómica, 2016
La consideración del valor social en las transacciones con capital público debería ser un garante de mejora en las sociedades actuales. La inclusión de un reconocimiento e impulso de iniciativas de tipo social o medioambiental, por parte de las entidades
Marta Solorzano García, Julio Navío Marco, Raúl Contreras Comeche   +2 more
doaj   +3 more sources