Results 51 to 60 of about 184,175 (290)

Laser‐Induced Graphene from Waste Almond Shells

open access: yesAdvanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova   +9 more
wiley   +1 more source

The Egnatia Motorway and The Changes in Interregional Trade in Greece: An Ex Ante Assessment [PDF]

open access: yes, 2009
The Egnatia Motorway, located in the northern part of Greece, constitutes one of the most important, as well as ambitious, projects of the Trans-European Transport Networks programme (TETN) funded by the European Commission.
Polyzos, Serafeim
core   +1 more source

Pore Size Effects of Mesoporous N‐Doped Carbon Nanospheres as Advanced Support Material on the Activity of Molybdenum Sulfide Catalysts for the Hydrogen Evolution Reaction

open access: yesAdvanced Functional Materials, EarlyView.
By tuning the pore size of mesoporous N‐doped carbon (MPNC) nanospheres as support material for molybdenum sulfide, the electrochemical activity of the composite material for the hydrogen evolution reaction can be optimized. An ideal MPNC pore size of 60 nm allows a high number of molybdenum sulfide active sites while maintaining efficient proton and ...
Niklas Ortlieb   +3 more
wiley   +1 more source

El legado tecnológico de la Segunda Guerra Mundial

open access: yesPrisma Tecnológico, 2018
En este artículo presentamos cuatro de las innumerables tecnologías que fueron desarrolladas durante la segunda Guerra Mundial y de las que sus variantes hoy en día tienen un uso imprescindible en nuestro diario ...
Guadalupe González
doaj   +1 more source

A comparison of the physical and chemical composition of UK waste streams based on hypothetical compound structure [PDF]

open access: yes, 2008
The suitability and effectiveness of a waste treatment process or strategy depends upon a waste stream’s physical and chemical composition. Chemical properties of UK waste streams, particularly MSW, are limited while physical properties are better ...
Chester, M., Lees, M., Stupples, D.
core  

Role of Histidine‐Containing Peptoids in Accelerating the Kinetics of Calcite Growth

open access: yesAdvanced Functional Materials, EarlyView.
Amphiphilic histidine‐containing peptoids mimic carbonic anhydrase (CA) to accelerate calcite step growth. In the presence of Zn2+, they promote the deprotonation of HCO3−, the desolvation of Ca2+, and the reorganization of interfacial hydration layers, thereby reducing the activation barrier for calcite growth.
Mingyi Zhang   +5 more
wiley   +1 more source

El etanol como materia prima petroquímica

open access: yesIngeniería e Investigación, 1981
En este trabajo se presentan los aspectos relevantes de un programa a de investigación, aprobado por el CINDEC y COLCIENCIAS, sobre el desarrollo y estudio cinético de catalizadores para algunas reacciones químicas en las que el etanol está involucrado ...
Luis M. Carballo, Francisco Sánchez
doaj  

La explotación minera en la Región Andina: un enfoque termodinámico [PDF]

open access: yes, 2017
La extracción de recursos naturales en América Latina ha sido y sigue siendo una actividad que tiene diversas implicaciones tanto en aspectos sociales como culturales, económicos y políticos.
Calvo, Guiomar   +5 more
core  

Laser‐Welded Cellulose‐Carbon Nanotube Nanocomposites as a 3D Scaffold of Si Anodes for High‐Performance Lithium‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A Si anode comprising entangled networks of cellulose and SWCNT (C‐CNT) nanocomposites as an anode electrode for a high‐performance LIB is realized by fully utilizing the generated microstructure of a novel conductive 3D scaffold via a low‐temperature and eco‐friendly process. Additionally, localized heating via photo‐thermal conversion can be utilized
Boeun Ryu   +5 more
wiley   +1 more source

Particularităţile calculului termic al motorului diesel alimentat cu biocombustibil

open access: yesAgricultural Science, 2011
The paper presents the peculiarities of thermal calculation of the compression ignition engines and determines the comparative parameters of the working cycle process, energy and economy indicators, functioning of pressure gas cylinder of the diesel ...
BEŞLEAGĂ Igor
doaj  

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