Results 81 to 90 of about 397,228 (314)

Prediction of the fouling thermal resistance on the sulphydric acid coolers

Minería y Geología, 2018
Heat exchangers’ fouling causes increased resistance to thermal exchange, with subsequent efficiency loss. Although related analysis has been exposed in previous studies, the available mathematical models do not consider all forms and mechanisms of ...
Andres A. Sánchez-Escalona, Ever Góngora-Leyva, Carlos Zalazar-Oliva   +2 more
doaj  

Research Status of Resource Utilization and Sulfidation Roasting Technology of a Low-grade Nickel Sulfide Ore

Kuangchan zonghe liyong
The reserves of nickel ore resources are rich in China, mainly nickel sulfide.With the continuous exploitation of the high-grade nickel sulfide ore with high quality and easy to choose, its reserves and production are decreasing year by year.
Yingying SHEN, Wenbo GUO, Yutian MA, Bingang LU, Tianyue LIU, Xianshao ZHAO   +5 more
doaj   +1 more source

Evolution semigroups for nonautonomous Cauchy problems

Abstract and Applied Analysis, 1997
In this paper, we characterize wellposedness of nonautonomous, linear Cauchy problems (NCP)  {u˙(t)=A(t)u(t)u(s)=x∈X on a Banach space X by the existence of certain evolution semigroups.
Gregor Nickel
doaj   +1 more source

Light‐Responsive Enzyme‐Loaded Nanoparticles for Tunable Adhesion and Mechanical Wound Contraction

Advanced Functional Materials, EarlyView.
This study presents a photoactivatable enzyme‐loaded mesoporous nanoparticle system (MPDA_PaTy) that enables light‐triggered tunable tissue adhesion and facilitates mechanical wound contraction. Controlled enzymatic crosslinking at tissue or hydrogel interfaces allows on‐demand adhesion.
Junghyeon Ko, Hyeon‐Jin Kim, Jeong‐Uk Kim, Seh Ri Oh, Tae Hoon Kang, Junghwan Byun, Uk‐Jae Lee, Minglin Ma, Su‐Hwan Kim, Byung‐Gee Kim, Nathaniel S. Hwang   +10 more
wiley   +1 more source

A 3D Biofabricated Disease Model Mimicking the Brain Extracellular Matrix Suitable to Characterize Intrinsic Neuronal Network Alterations in the Presence of a Breast Tumor Disseminated to the Brain

Advanced Functional Materials, EarlyView.
A 3D disease model is developed using customized hyaluronic‐acid‐based hydrogels supplemented with extracellular matrix (ECM) proteins resembling brain ECM properties. Neurons, astrocytes, and tumor cells are used to mimic the native brain surrounding.
Esra Türker, Mateo S. Andrade Mier, Jessica Faber, Mike Friedrich, Zan Lamberger, Jeannette Weigelt, Christian Stigloher, Nicoletta Murenu, Natascha Schaefer, Jörg Tessmar, Gregor Lang, Silvia Budday, Katrin G. Heinze, Antje Appelt‐Menzel, Pamela L. Strissel, Reiner Strick, Carmen Villmann   +16 more
wiley   +1 more source

Quantifying Spatio‐Operational Heterogeneity in Electrochemical Devices via Operando Correlative Neutron and X‐Ray Tomography

Advanced Functional Materials, EarlyView.
Heterogeniety in electrochemical systems heavily influences device performance and durability. The study shows unique evidence of spatio‐operational heterogeneity in fuel cells via operando neutron and X‐ray tomography. Large variations in membrane thickness and hydration depend upon location and operating conditions, with implications on membrane ...
Pranay Shrestha, Jacob M. LaManna, Kieran F. Fahy, ChungHyuk Lee, Pascal J. Kim, Jason K. Lee, Elias Baltic, Daniel S. Hussey, David L. Jacobson, Aimy Bazylak   +9 more
wiley   +1 more source

Preliminary study on carboxylation reaction of phenylacetylene with CO₂using nickel catalyst impregnated on mesoporous carbon

, 2020
Ahmed Adnan Hadi, Iman Abdullah, Yuni Krisyuningsih Krisnandi   +2 more
openalex   +1 more source

Determinación de los contenidos de cromo en las espinelas cromíferas del yacimiento laterítico Camarioca Norte

Minería y Geología
Se determinaron los contenidos de cromo en las espinelas cromíferas del yacimiento laterítico Camarioca Norte. Se utilizó la espectroscopía de emisión atómica con fusión inductiva, modelo Spectro ARCOS con modo de observación radial y la fluorescencia de
Jorge Luis Urra-Abraira, José Nicolás Muñoz-Gómez, Alain Carballo-Peña   +2 more
doaj  

Petrologic-geochemical characterization of ultramafic association in Camarioca Sur area of Moa-Baracoa ophiolite complex

Minería y Geología, 2019
Camarioca Sur is a sector in Moa-Baracoa ophiolitic complex composed of pyroxene ultramaphites, gneissic amphiboles, chromium-spinels and amphibolitic granofels, in which the presence of compact and hard rock dykes has been documented, white to dark gray
Yurisley Valdés-Mariño, José Nicolás Muñoz-Gómez, Gerardo Antonio Orozco-Melgar, Idael Francisco Blanco-Quintero, Luis Alberto Pérez-García, Jorge Urra-Abraira   +5 more
doaj  

Array Processing for Radar: Achievements and Challenges

International Journal of Antennas and Propagation, 2013
Array processing for radar is well established in the literature, but only few of these algorithms have been implemented in real systems. The reason may be that the impact of these algorithms on the overall system must be well understood.
Ulrich Nickel
doaj   +1 more source