نتایج جستجو برای: sediment injection

تعداد نتایج: 194023  

2005
Filip J. R. Meysman Oleksiy S. Galaktionov Britta Gribsholt Jack J. Middelburg

The physical mechanism that drives bioirrigation is strongly dependent on the permeability of the sediment. We advance two mechanisms, each described by a corresponding microenvironment model. In muds, burrow water cannot penetrate the sediment, so bioirrigation is intrinsically driven by diffusional transfer across the burrow wall. This ‘‘diffusive’’ mode of bioirrigation is accurately describ...

2014
Kaipo Perez Kuʻulei S. Rodgers Paul L. Jokiel Claire V. Lager Daniel J. Lager

Survival and settlement of Pocillopora damicornis larvae on hard surfaces covered with fine (<63 µm) terrigenous red clay was measured in laboratory Petri dishes. The dishes were prepared with sediment films of various thicknesses covering the bottoms. Coral larvae were incubated in the dishes for two weeks and the percent that settled on the bottom was determined. There was a statistically sig...

2016
Bao Son Trinh Brian Reid Kevin Hiscock

BACKGROUND Sorption and biodegradation are the primary processes of organic pollution remediation in aquatic and soil/sediment environments. While researchers have substantially reported their findings regarding these processes, little attention has been given to description of experimental apparatus. This technical paper aims to present the development and detailed design of a fixed-bed column...

2013
Beth N. Orcutt Douglas E. LaRowe Jennifer F. Biddle Frederick S. Colwell Brian T. Glazer Brandi Kiel Reese John B. Kirkpatrick Laura L. Lapham Heath J. Mills Jason B. Sylvan Scott D. Wankel C. Geoff Wheat

The vast marine deep biosphere consists of microbial habitats within sediment, pore waters, upper basaltic crust and the fluids that circulate throughout it. A wide range of temperature, pressure, pH, and electron donor and acceptor conditions exists-all of which can combine to affect carbon and nutrient cycling and result in gradients on spatial scales ranging from millimeters to kilometers. D...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2016
Dominic A Hodgson Michael J Bentley James A Smith Julian Klepacki Keith Makinson Andrew M Smith Kevin Saw Reed Scherer Ross Powell Slawek Tulaczyk Mike Rose David Pearce Matt Mowlem Peter Keen Martin J Siegert

Accumulations of sediment beneath the Antarctic Ice Sheet contain a range of physical and chemical proxies with the potential to document changes in ice sheet history and to identify and characterize life in subglacial settings. Retrieving subglacial sediments and sediment cores presents several unique challenges to existing technologies. This paper briefly reviews the history of sediment sampl...

Journal: :Journal of environmental sciences 2014
Fengyu Zan Shouliang Huo Jingtian Zhang Li Zhang Beidou Xi Lieyu Zhang

Arsenic (As) fractions in the sediments of seven lakes from East Plain Ecoregion and six lakes from Yungui Plateau Ecoregion, China, were investigated. Results indicated that the total As concentrations in sediment samples of lakes of the East Plain Lake Ecoregion are higher than those of Yungui Plateau Lake Ecoregion. Residual As is the main fraction in sediment samples of lakes from both ecor...

ژورنال: تحقیقات موتور 2019

High pressure amount of fuel in new generation diesel engines’ injector equipped with multiple and small nozzle holes has created significant improvement in the outgoing spray behavior and engine performance. On the other hand, poor fuel quality and injector nozzle embedded in high temperature combustion chamber form fundamental deposits on the nozzle leading to fuel spray inappropriate behavio...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2007
Fabrina R S Bentlin Fábio A Duarte Valderi L Dressler Dirce Pozebon

This work deals with As determination in marine sediment using ultrasound for sample preparation. It is shown that As can be quantitatively extracted from marine sediment using 20% (v/v) HCl and sonication. The slurry is centrifuged and the analyte is determined in the supernatant by hydride generation atomic absorption spectrometry (HG AAS). A flow injection (FI) system is employed for hydride...

Journal: :Geomorphology 2014
Brian W Miller Martin W Doyle

Researchers have independently documented the effects of land use on rivers and threats to river management institutions, but the relationship between changes in institutional context and river condition is not well described. This study assesses the connections between resource management institutions, land use, and rivers by integrating social science, geospatial analysis, and geomorphology. ...

2004
Robert C. Borden Kapo M. Coulibaly

3D-39, in: A.R. Gavaskar and A.S.C. Chen (Eds.), Remediation of Chlorinated and Recalcitrant Compounds—2004. Proceedings of the Fourth International Conference on Remediation of Chlorinated and Recalcitrant Compounds (Monterey, CA; May 2004). ISBN 1-57477-145-0, published by Battelle Press, Columbus, OH, www.battelle.org/bookstore. GUIDELINES FOR EFFECTIVE DISTRIBUTION OF EMULSIFIED EDIBLE OILS...

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