نتایج جستجو برای: dispersible clay

تعداد نتایج: 22748  

Journal: :Journal of environmental quality 2009
Katerina M Dontsova Charolett Hayes Judith C Pennington Beth Porter

Explosives in soils can present environmental problems for military installations. Fine, mobile particles represent the most reactive fraction of the soil and, therefore, are expected to adsorb explosives and potentially facilitate their transport. The objective of this study was to determine the relative significance of phyllosilicate clay, organic matter, and two forms of extractable iron in ...

Journal: :Geoderma 2021

Structure liming aims to improve soil structure (i.e., the spatial arrangement of particles and pores) its stability against external internal forces. Effects lime application on have received considerable interest, but only a few studies investigated effects macro- mesopore networks. We used X-ray computed tomography image macropore networks (ø ≥ 0.3 mm) in columns mesopores 0.01 aggregates fr...

2017
Ann M. Buchanan Michael Holton Ian Conn Mark Davies Mike Choukour Brian R. Wynne

Dolutegravir (DTG) is approved in the United States to treat HIV-1-infected patients weighing ≥30 kg. A dispersible DTG tablet formulation was recently developed for pediatric patients. This study compares the pharmacokinetics (PK) of the dispersible tablet with that of a previously evaluated granule formulation. In this randomized, open-label, crossover study, 15 healthy adults received single...

ژورنال: علوم آب و خاک 2015
افیونی, مجید , حاج‌عباسی, محمدعلی , مصدقی , محمدرضا, کرمانپور, مهدیه,

Petroleum pollution is an important environmental issue in most of the countries especially those have an oil industry. This study was conducted to investigate the effect of petroleum pollution on soil water repellency and its relation to soil structural stability in Bakhtiardasht area, Isfahan. Polluted and adjacent non-polluted locations were selected to be representative in the green space a...

Journal: :Chemical Engineering Science 2022

The present work investigates mechanisms of permeability impairment as a result low-salinity fluid injection into brine-saturated porous media containing dispersible clays. We computational dynamics model at the pore-scale to simulate detachment, migration and straining fine particles in media. uses an immersed boundary method motion clay fines fluid. In addition hydrodynamic forces, we Derjagu...

2002
J. N. Shaw

Coarse-textured surface horizons are common in highly weathered southeastern US coastal plain soils. These soils have historically been managed under conventional tillage practices, but conservation tillage management practices are increasing. Although clay (<2 �m) contents are low in these surface horizons (typically <100 g kg−1), the reactive nature of this fraction tends to play a dominant r...

Extended abstract 1- Introduction Soil erosion is one of the most important problems in the arid and semi-arid areas in Iran and the knowledge about its content has an important role on the management practices of soil conservation. Topography as one of the soil-making factors affects the physical properties of the soil through the aspect and the degree of the slope. The aspect of the slope c...

Journal: :Neurobiology of aging 2012
Ajeet Rijal Upadhaya Estibaliz Capetillo-Zarate Irina Kosterin Dorothee Abramowski Sathish Kumar Haruyasu Yamaguchi Jochen Walter Marcus Fändrich Matthias Staufenbiel Dietmar Rudolf Thal

Soluble amyloid β-protein (Aβ) aggregates have been identified in the Alzheimer's disease (AD) brain. Dispersed Aβ aggregates in the brain parenchyma are different from soluble, membrane-associated and plaque-associated solid aggregates. They are in mixture with the extra- or intracellular fluid but can be separated from soluble proteins by ultracentrifugation. To clarify the role of dispersibl...

ژورنال: علوم آب و خاک 2004
فؤاد تاجیک, ,

Aggregation is an important temporal property of soil structure that is affected by intrinsic soil properties and also soil use and management. Aggregate stability has a strong influence on many processes in soil such as infiltration, aeration, strength, erosion, and soil’s ability to transmit liquids, solutes, gases, and heat. In this study, undisturbed soil specimens from 0-10 and 10-20 cm de...

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