In this study, the efficiency of a clean-up method by gel permeation chromatography (GPC) for the separation of pesticides from lanolin is analyzed. The pesticides analyzed belong to two different families, organophosphorous and synthetic pyrethroids. Lanolin, a standard mixture of the pesticides, and a lanolin-pesticides mixture are injected in a GPC column. The recoveries and elution times fr...

Published in Agron. J. 105:721–726 (2013) doi:10.2134/agronj2012.0353 Available freely online through the author-supported open access option. Copyright © 2013 by the American Society of Agronomy, 5585 Guilford Road, Madison, WI 53711. All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, r...

This paper discusses the designs of Generalized Predictive Control (GPC) scheme. GPC is designed in two cases; the first is a multirate system, where the sampling interval of a plant output is an integer multiple of the holding interval of a control input, and the second is a fast-rate single-rate system, where both the holding and sampling intervals are equivalent to the holding interval of th...

AIMS To develop a Glass Polyalkenoate Cement that is suitable for vertebroplasty. METHODS Testing was carried out to assess the effect of gamma irradiation used for sterilisation, on the glass transition temperature as well as its mechanical properties, including compressive strength and biflexural strength in vivo as well as testing GPC and PMMA cements post injection in cadaveric human vert...

This paper presents a review of the current state-of-the-art of numerical methods for stochastic computations. The focus is on efficient high-order methods suitable for practical applications, with a particular emphasis on those based on generalized polynomial chaos (gPC) methodology. The framework of gPC is reviewed, along with its Galerkin and collocation approaches for solving stochastic equ...

We propose an adaptive Wick–Malliavin (WM) expansion in terms of the Malliavin derivative of order Q to simplify the propagator of general polynomial chaos (gPC) of order P (a system of deterministic equations for the coefficients of gPC) and to control the error growth with respect to time. Specifically, we demonstrate the effectiveness of the WM method by solving a stochastic reaction equatio...

Addition of 1-O-alk-1'-enyl-2-lyso-sn-glycero-3-phosphoethanolamine (alkenyl-lyso-GPE) to human neutrophil membrane preparations containing 1-O-[3H]hexadecyl-2-arachidonoyl-sn-glycero-3-phosphorylcholine (1-O-[3H]alkyl-2-arachidonoyl-GPC) resulted in rapid deacylation of the 1-O-[3H]alkyl-2-arachidonoyl-GPC to 1-O-[3H]alkyl-2-lyso-GPC (lyso-platelet-activating factor, lyso-PAF). When acetyl-CoA...

We develop a multi-element generalized polynomial chaos (ME-gPC) method for arbitrary probability measures and apply it to solve ordinary and partial differential equations with stochastic inputs. Given a stochastic input with an arbitrary probability measure, its random space is decomposed into smaller elements. Subsequently, in each element a new random variable with respect to a conditional ...

The performance of Generalized Predictive Control (GPC) algorithm without parameter estimation is studied to investigate its robustness property. A thermal process which can be represented by a general first order plus dead time model is selected as the test plant. GPC is found to be robust to changes in the time constant, less robust to process gain, but rather sensitive to the dead time. It i...

OBJECTIVE The levels of 10 heavy metals (arsenic, bismuth, cadmium, chromium, copper, iron, lead, manganese, nickel, and zinc) in gray Portland cement (GPC), white Portland cement (WPC), gray MTA (GMTA), and white MTA (WMTA) were analyzed by inductively coupled plasma-atomic emission spectrometry (ICP-AES). STUDY DESIGN One gram of each material was digested with 80 degrees C "aqua-regia" (7 ...