Results 11 to 20 of about 9,642,220 (333)

Field, Laboratory and Modeling Evidence for Strong Attenuation of a Cr(VI) Plume in a Mudstone Aquifer Due to Matrix Diffusion and Reaction Processes

open access: yesSoil Systems, 2021
This study uses a combination of conventional and high resolution field and laboratory methods to investigate processes causing attenuation of a hexavalent chromium (Cr(VI)) plume in sedimentary bedrock at a former industrial facility.
Steven Chapman   +6 more
doaj   +1 more source

Multicomponent Reactions [PDF]

open access: yesMolecules, 2019
Multicomponent Reactions appear to be ideal for any form of synthesis, because of their numerous advantages in terms of sustainability and selectivity in building up complex molecular architectures, with high molecular diversity. This Special Issue collects seven contributions which expand our knowledge about Multicomponent Reactions, providing a good ...
openaire   +4 more sources

INTENSIFY HEAT-RESISTANT BINDER BASED ON PORTLAND CEMENT

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2016
Aim. The article presents the results of a study of heat-resistant binder based on Portland cement with the addition of a local mill ground minerals.Methods. Activation is carried out on a planetary mill "Activator - 4M".
R. M. Curbanov   +2 more
doaj   +1 more source

Numerical Simulation of Non-Linear Models of Reaction—Diffusion for a DGT Sensor

open access: yesAlgorithms, 2020
In this work, we present a novel strategy for the numerical solution of a coupled system of partial differential equations that describe reaction–diffusion processes of a mixture of metals and ligands that can be absorbed by a sensor or a microorganism ...
Joan Cecilia Averós   +2 more
doaj   +1 more source

Profile of Physical Conditions of High School Futsal Players in Gorontalo

open access: yesJuara, 2023
The purpose of this study was to determine the physical condition of each futsal player at SMA Negeri 1 Gorontalo; this was to provide an overview to the coach regarding the physical condition of each individual.
Gilang Ramadan, Giofandi Samin
doaj   +1 more source

Methyl esters selectivity of transesterification reaction with homogenous alkaline catalyst to produce biodiesel in batch, plug flow, and continuous stirred tank reactors [PDF]

open access: yes, 2014
Selectivity concept is essential in establishing the best operating conditions for attaining maximum production of the desired product. For complex reaction such as biodiesel fuel synthesis, kinetic studies of transesterification reaction have revealed ...
Kamarudin, S. K.   +3 more
core   +3 more sources

A Comparison of Bimolecular Reaction Models for Stochastic Reaction Diffusion Systems [PDF]

open access: yes, 2013
Stochastic reaction-diffusion models have become an important tool in studying how both noise in the chemical reaction process and the spatial movement of molecules influences the behavior of biological systems. There are two primary spatially-continuous
Agbanusi, Ikemefuna C.   +1 more
core   +1 more source

The Ti/c-Si solid state reaction : III. The low-temperature reaction kinetics [PDF]

open access: yes, 1990
Thin Ti layers (≈10nm) are grown on top of a clean Si(111) substrate. Heating these layers initiates a solid state reaction, yielding a monosilicide phase at ≈350°C and a C49 disilicide at ≈450°C.
Nijs, J.M.M. de, Silfhout, A. van
core   +9 more sources

Oxygen Consumption Characteristics in 3D Constructs Depend on Cell Density

open access: yesFrontiers in Bioengineering and Biotechnology, 2019
Oxygen is not only crucial for cell survival but also a determinant for cell fate and function. However, the supply of oxygen and other nutrients as well as the removal of toxic waste products often limit cell viability in 3-dimensional (3D) engineered ...
Chiara Magliaro   +6 more
doaj   +1 more source

Sound Quality Characteristics of Importance for Preschool Children’s Perception and Wellbeing After an Acoustic Intervention

open access: yesFrontiers in Built Environment, 2021
In Sweden preschool-age children spend most of their waking hours at preschool. At this age children undergo substantial physical and mental development and their hearing sensations may not be comparable to those of an adult.
Kerstin Persson Waye, Jonas Karlberg
doaj   +1 more source

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