oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 72 )

2018 ( 1164 )

2017 ( 1167 )

2016 ( 1227 )

Custom range...

Search Results: 1 - 10 of 304689 matches for " Y.L Yu "
All listed articles are free for downloading (OA Articles)
Page 1 /304689
Display every page Item
PREDICTION OF BIOAVAILABILITY OF CHLORPYRIFOS RESIDUES IN SOIL TO EARTHWORMS
X.M Wu,Y.L Yu,M Li,Y.H Long
Journal of Soil Science and Plant Nutrition , 2011,
Abstract: An incubation test was conducted to investigate the effect of aging on bioavailability of chlorpyrifos in soil and to assess the feasibility of chemical extraction techniques for predicting bioavailability of chlorpyrifos in soil. Chlorpyrifos was spiked into sterilized soil and aged in microcosms for up to 120 days. The earthworms were incubated in the spiked soils, at 0, 7, 14, 30, 60, and 120 days after spiking, for a period of 7 days. After exposure, chlorpyrifos concentrations in the earthworm tissues were determined. Change in chemical extractability of soil-chlorpyrifos was measured using a several solvent systems including methanol, methanol-water (9:1), acetone-water (5:3), and water. The results show that chemical extractability and earthworm bioavailability of chlorpyrifos in soil decreased with aging. The amount of aged and unaged chlorpyrifos recovered from soil varied with the individual chemical extractant and extraction method. Concentrations of chlorpyrifos in Eisenia foetida were significantly higher than in Allolobophora caliginosa, suggesting that the bioavailability of chlorpyrifos was a species-dependent process. The extractability of chlorpyrifos by chemical solvents was significantly correlated with bioavailability fraction of E. foetida and A. caliginosa, showing that these extraction techniques may be efficient for predicting bioavailability of chlorpyrifos in soil.
Prof. A.P. Misra Memorial Lifetime Achievement Award (2008-09) - Y.L. Nene
Y.L. Nene
Indian Phytopathology , 2011,
Abstract:
Chr. M ller, Jacob Cornelisz. van Oostsanen und Doen Pietersz. Studien zur Zusammenarbeit zwischen Holzschneider und Drucker im Amsterdam des frühen 16. Jahrhunderts
Y.L. Bleyerveld
BMGN : Low Countries Historical Review , 2007,
Abstract:
I.M. Veldman, Profit and pleasure. Print books by Crispijn de Passe
I.M. Veldman, Crispijn de Passe and his progeny (1564-1670). A century of print production

Y.L. Bleyerveld
BMGN : Low Countries Historical Review , 2003,
Abstract:
A. de Vries, Ingelijst werk. De verbeelding van arbeid en beroep in de vroegmoderne Nederlanden
Y.L. Bleyerveld
BMGN : Low Countries Historical Review , 2005,
Abstract:
G.W.C. van Wezel, P. le Blanc, De Onze-Lieve-Vrouwekerk en de grafkapel voor Oranje-Nassau te Breda
Y.L. Bleyerveld
BMGN : Low Countries Historical Review , 2004,
Abstract:
PREDICTION OF BIOAVAILABILITY OF CHLORPYRIFOS RESIDUES IN SOIL TO EARTHWORMS
Wu,X.M; Yu,Y.L; Li,M; Long,Y.H; Fang,H; Li,S.N;
Journal of soil science and plant nutrition , 2011, DOI: 10.4067/S0718-95162011000100004
Abstract: an incubation test was conducted to investigate the effect of aging on bioavailability of chlorpyrifos in soil and to assess the feasibility of chemical extraction techniques for predicting bioavailability of chlorpyrifos in soil. chlorpyrifos was spiked into sterilized soil and aged in microcosms for up to 120 days. the earthworms were incubated in the spiked soils, at 0, 7, 14, 30, 60, and 120 days after spiking, for a period of 7 days. after exposure, chlorpyrifos concentrations in the earthworm tissues were determined. change in chemical extractability of soil-chlorpyrifos was measured using a several solvent systems including methanol, methanol-water (9:1), acetone-water (5:3), and water. the results show that chemical extractability and earthworm bioavailability of chlorpyrifos in soil decreased with aging. the amount of aged and unaged chlorpyrifos recovered from soil varied with the individual chemical extractant and extraction method. concentrations of chlorpyrifos in eisenia foetida were significantly higher than in allolobophora caliginosa, suggesting that the bioavailability of chlorpyrifos was a species-dependent process. the extractability of chlorpyrifos by chemical solvents was significantly correlated with bioavailability fraction of e. foetida and a. caliginosa, showing that these extraction techniques may be efficient for predicting bioavailability of chlorpyrifos in soil.
Melt Infiltration Casting Of Zr57Al10Nb5Cu15.4Ni12.6 Amorphous Matrix Composite  [PDF]
K.Q. Qiu, Y.L. Ren
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2004, DOI: 10.4236/jmmce.2004.32010
Abstract: The Zr57Al10Nb5Cu15.4Ni12.6 bulk metallic glass-forming alloy is reinforced with tungsten fiber. Cylindrical samples up to 6.3 mm in diameter and 7cm in length have been synthesized using melt infiltration casting method. The structure and microstructure of the composites processed in typical conditions were analyzed by x-ray diffraction and scanning electron microscopy. The suitable interface reaction and fully amorphous matrix can only be obtained through the combination of a suitable infiltration temperature and time. The processing conditions were more rigorous compared to those of making Zr-Ti-Ni-Cu-Be matrix composite due to intermetallic compound nucleation when exposed to the tungsten fibers. A technique map, including infiltrating temperature and time is presented in this paper.
Social Capital, IT Capability, and the Success of Knowledge Management Systems
Irene Y.L. Chen
Knowledge Management & E-Learning : an International Journal , 2009,
Abstract: Many organizations have implemented knowledge management systems to support knowledge management. However, many of such systems have failed due to the lack of relationship networks and IT capability within organizations. Motivated by such concerns, this paper examines the factors that may facilitate the success of knowledge management systems. The ten constructs derived from social capital theory, resource-based view and IS success model are integrated into the current research model. Twenty-one hypotheses derived from the research model are empirically validated using a field survey of KMS users. The results suggest that social capital and organizational IT capability are important preconditions of the success of knowledge management systems. Among the posited relationships, trust, social interaction ties, IT capability do not significantly impact service quality, system quality and IT capability, respectively. Against prior expectation, service quality and knowledge quality do not significantly influence perceived KMS benefits and user satisfaction, respectively. Discussion of the results and conclusion are provided. This study then provides insights for future research avenue.
Understanding Retailers’ Acceptance of Virtual Stores
Irene Y.L. Chen
Knowledge Management & E-Learning : an International Journal , 2010,
Abstract: The acceptance of e-commerce among consumers has stimulated the rise of virtual stores. Increasing traditional retailers or people who do not have sufficient capital for maintaining a brick-and-mortar store have considered using virtual stores to reach global market. In the e-commerce literature, there has been rich research evidence concerning consumers’ acceptance of virtual stores. However, rigorous academic research on retailers’ acceptance of virtual stores is relatively scarce today. This study draws upon the theory of planned behavior and information richness theory to propose an integrated theoretical model. A field survey is used to collect data from e-tailers. The data are analyzed to examine the six relationships posited in the research model. Findings of this study provide a further research avenue for e-commerce, and implications for those who are managing or considering using virtual stores.
Page 1 /304689
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.