Results 21 to 30 of about 19,958 (191)

The exohedral Diels-Alder reactivity of the titanium carbide endohedral metallofullerene Ti2C2@D(3h)-C78: comparison with D(3h)-C78 and M3N@D(3h)-C78 (M=Sc and Y) reactivity.

Chemistry (Weinheim an der Bergstrasse, Germany), 2012
The chemical functionalization of endohedral (metallo)fullerenes has become a main focus of research in the last few years. It has been found that the reactivity of endohedral (metallo)fullerenes may be quite different from that of the empty fullerenes.
Garcia Borràs, Marc, Osuna Oliveras, Sílvia, Luis Luis, Josep Maria, Swart, Marcel, Solà i Puig, Miquel   +4 more
openaire   +3 more sources

Efecto del tiempo de exposición al fuego en la resistencia a flexión de vigas de hormigón armado

Gaceta Técnica, 2018
En este artículo se discute la resistencia a flexión de vigas de hormigón armado de sección transversal cuadrada, expuestas al fuego durante diferentes tiempos. Después de ser expuestas se enfriaron a temperatura ambiente durante 24 horas, momento en que
Maritza Elizabeth Ureña Aguirre, Giovanni Josué Alvarado Aguirre   +1 more
doaj   +1 more source

Behavior of geopolymer concrete deep beams containing waste aggregate of glass and limestone as a partial replacement of natural sand

Case Studies in Construction Materials, 2021
The geopolymer concrete has outstanding physical properties and positive impact on environment compared to conventional concrete. Present endeavor highlights a strategy for management of glass and limestone waste to recycle them in geopolymer concrete ...
Sundis M.S. Taher, Shireen T. Saadullah, James H. Haido, Bassam A. Tayeh   +3 more
doaj   +1 more source

Time-Preference Heterogeneity and Multiplicity of Equilibria in Two-Group Bargaining

Games, 2016
We consider a multilateral bargaining game in which the agents can be classified into two groups according to their instantaneous preferences. In one of these groups there is one agent with a different discount factor. We analyze how this time-preference
Daniel Cardona, Antoni Rubí-Barceló
doaj   +1 more source

Molecular Mechanisms Underpinning Aggregation in Acidiphilium sp. C61 Isolated from Iron-Rich Pelagic Aggregates

Microorganisms, 2020
Iron-rich pelagic aggregates (iron snow) are hot spots for microbial interactions. Using iron snow isolates, we previously demonstrated that the iron-oxidizer Acidithrix sp. C25 triggers Acidiphilium sp.
Qianqian Li, Rebecca E. Cooper, Carl-Eric Wegner, Kirsten Küsel   +3 more
doaj   +1 more source

Afectación de la Resistencia a la Flexión en Concretos Modificados con Reciclado de Concreto

Infraestructura Vial, 2017
La necesidad  actual de buscar alternativas para disminuir el impacto ambiental por la explotación cada vez mayor de las canteras y aprovechar los materiales resultantes de los procesos de demolición, en este documento se presentan los resultados ...
Sandra Elodia Ospina Lozano, Lucio Guillermo López Yépez, Jeinner Arley Carrillo Carrillo, Leidy Johanna Díaz Garzón   +3 more
doaj   +1 more source

Generalization of the noise model for time-distance helioseismology

, 2014
In time-distance helioseismology, information about the solar interior is encoded in measurements of travel times between pairs of points on the solar surface. Travel times are deduced from the cross-covariance of the random wave field.
Birch, Aaron C., Fournier, Damien, Gizon, Laurent, Hohage, Thorsten   +3 more
core   +1 more source

Optimal bank credit financing and cost-reducing knowledge for a supplier under different channel structures

Journal of Innovation & Knowledge
This study examines a supply chain consisting of a capital-constrained supplier and a retailer. The supplier sells wholesale products to consumers through the retailer and may also sell directly to consumers via an online channel. Given that the supplier’
Jing Xia, Yujie Xiao, Ling Yao, Chuanxin Xia   +3 more
doaj   +1 more source

ELECTRICAL CONDUCTIVITY OF BORATE-BARIUM GLASS C78-5 IN THE EDUCATION AND GROWTH OF NANOCRYSTALS [PDF]

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2013
The temperature dependence and kinetics of changes in the electrical conductivity at a constant temperature annealing of borate-barium glass C78-5 is investigated experimentally. The values of the activation energy of electrical conductivity in different
A.M. Karmokov, Z.V. Shomakhov, O.A. Molokanov   +2 more
doaj  

Properties of Concrete with Tire Derived Aggregate Partially Replacing Coarse Aggregates

The Scientific World Journal, 2015
Tire derived aggregate (TDA) has been proposed as a possible lightweight replacement for mineral aggregate in concrete. The role played by the amount of TDA replacing coarse aggregate as well as different treatment and additives in concrete on its ...
Gideon Siringi, Ali Abolmaali, Pranesh B. Aswath   +2 more
doaj   +1 more source