
Web of Science, 2003-02-28, „deconvolution + kinetic*” (453 found)
Mougin P, Thomas A, Wilkinson D, et al.
On-line monitoring of a crystallization process
AICHE J 49 (2): 373-378 FEB 2003
On-Line Monitoring of a Crystallization Process
Patricia Mougina, Alistair Thomasa, Derek Wilkinsona, Graeme Whitea, Kevin J. Robertsb,
Norbert Herrmannc, Robert Jackc and Richard Tweediec
a
Center for Molecular and Interface Engineering, Dept. of Mechanical and Chemical
Engineering, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, U.K.
b
Institute for Particle Science and Engineering, Dept. of Chemical Engineering, University of
Leeds, Leeds LS2 9JT, U.K.
c
Malvern Instruments Ltd., Enigma Business Park, Malvern, Worcestershire, WR14 1XZ, U.K.
Received 28 January 2002; revised 12 September 2002. Available online 7 February 2003.
Abstract
The application of ultrasonic spectroscopy for particle-size measurements was investigated
during the batch crystallization of (L)-glutamic acid -polymorph from an aqueous solution. The
technique, based on measurements of the attenuation of ultrasonic waves through the suspension,
was applied using a prototype ultrasonic spectrometer with a flow-through cell. High-precision
measurements of ultrasonic attenuation in the frequency range 7–110 MHz were performed, the
deconvolution of which enabled in-process measurement of crystal size distribution and solid
concentration throughout the crystallization process. In addition to evincing secondary
nucleation, growth and crystal breakage on-line in real time, the experimental results were used
to obtain kinetic parameters essential for process design, including secondary nucleation rate and
growth rate.
McIntyre NS, Davidson RD, Kim G, et al.
New frontiers in X-ray photoelectron spectroscopy
VACUUM 69 (1-3): 63-71 DEC 24 2002
http://keszei.chem.elte.hu/DSP/X-rayVacuum69.pdf
DOI: 10.1016/S0042-207X(02)00308-1
PII: S0042-207X(02)00308-1
Copyright © 2002 Elsevier Science Ltd. All rights reserved.
New frontiers in X-ray photoelectron spectroscopy
N. S. McIntyre , , R. D. Davidson, G. Kim and J. T. Francis
Surface Science Western, Room G-1, Western Science Centre, University of Western Ontario,
London, Ont., Canada N6A 5B7
Available online 17 October 2002.
Abstract
X-ray photoelectron spectroscopy (XPS) has seen widespread use in applied and basic surface
science studies since 1970. Its capabilities appear to be undergoing a series of improvements,
due both to technological changes and to the culmination of efforts by the XPS community to
solve a series of scientific questions that underlie the technique. This paper describes some of the
advances made in the past 5 yr and uses two particular studies to illustrate the improvements: the
use of mathematical deconvolution to study the initial and extended oxidation of nickel metal,
and the use of XPS imaging to identify electrochemical processes during the pitting corrosion of
a nickel-based alloy. Finally, the use of modern synchrotrons in further improving the
spectroscopic capabilities of XPS will be described.
Author Keywords: XPS; Photoelectron spectroscopy; Oxidation; Surface analysis
Weinmann P, Faraggi M, Moretti JL, et al.
Clinical validation of simultaneous dual-isotope myocardial scintigraphy
EUR J NUCL MED MOL I 30 (1): 25-31 JAN 2003
Endicott JF, Uddin J, Schlegel HB
Some spectroscopic aspects of electron transfer in ruthenium(II) polypyridyl complexes
RES CHEM INTERMEDIAT 28 (7-9): 761-777 2002
Wadhawan JD, Welford PJ, McPeak HB, et al.
The simultaneous voltammetric determination and detection of oxygen and carbon
dioxide - A study of the kinetics of the reaction between superoxide and carbon dioxide
in non-aqueous media using membrane-free gold disc microelectrodes
SENSOR ACTUAT B-CHEM 88 (1): 40-52 JAN 1 2003
http://keszei.chem.elte.hu/DSP/SensActB88.pdf
Vincent L, Sbirrazzuoli N, Vyazovkin S
Evaluation of the dynamic response of a new heat flux calorimeter for kinetic purposes
IND ENG CHEM RES 41 (26): 6650-6655 DEC 25 2002
Doc. type: Article
Language: English
Cited References: 11
Times Cited: 0
Abstract:
A new reaction calorimeter has been developed for measuring the kinetics of reactions
accompanied by small thermal effects. For kinetic purposes, the calorimeter was calibrated by
simulating the heat flow in accord with a certain kinetic equation. This was accomplished by
applying a software-controlled voltage to a resistor placed inside the calorimeter, The
obtained isothermal data were deconvoluted and treated using two different kinetic methods
to explore the effect of deconvolution on the values of the kinetic parameters.
KeyWords Plus:
CONDENSED-PHASE REACTIONS
Addresses:
Vincent L, Univ Nice, Equipe Thermocinet, Parc Valrose, F-06108 Nice 2, France
Univ Alabama, Dept Chem, Birmingham, AL 35294 USA
Univ Nice, Equipe Thermocinet, F-06108 Nice 2, France
Publisher:
AMER CHEMICAL SOC, WASHINGTON
IDS Number: 628LC
ISSN: 0888-5885
**Veldhuis JD, Bidlingmaier M, Anderson SM, et al.
Impact of experimental blockade of peripheral growth hormone (GH) receptors on the
kinetics of endogenous and exogenous GH removal in healthy women and men
J CLIN ENDOCR METAB 87 (12): 5737-5745 DEC 2002
Impact of experimental blockade of peripheral growth hormone (GH) receptors on the
kinetics of endogenous and exogenous GH removal in healthy women and men
Veldhuis JD, Bidlingmaier M, Anderson SM, Evans WS, Wu Z, Strasburger CJ
JOURNAL OF CLINICAL ENDOCRINOLOGY AND METABOLISM
87 (12): 5737-5745 DEC 2002
Document type: Article Language: English Cited References: 43 Times Cited: 0
Abstract:
Organs that respond to and metabolize GH are enriched in cognate high-affinity receptors.
However, whether isologous receptors mediate the de facto access of ligand to cellular
degradative pathways is not known. To address this query, we assessed the distribution and
whole-body elimination kinetics of (endogenous and exogenous) GH before and after
administration of a novel, potent, and selective recombinant human (rh) GH receptor antagonist
peptide, pegvisomant. Sixteen healthy young adults (nine men and seven women) participated in
a double-blind, prospectively randomized, within-subject cross-over study. The intervention
comprised a single sc injection of placebo vs. a high dose of pegvisomant (1 mg/kg sc) timed 62
and 74 h before the overnight sampling and daytime infusion sessions, respectively. The halflife, metabolic clearance rate (MCR), and distribution volume of GH were quantitated by way of:
1) deconvolution analysis of serum GH concentration time series collected every 10 min for 10
h; 2) exponential regression analysis of the decay of GH concentrations after a 6-min iv pulse of
rhGH (1 and 10 mug/kg); 3) calculation of the MCR during constant iv infusion of rhGH (0.5
and 5.0 mug/kg every 2 h); and 4) exponential fitting of the elimination time-course of GH
concentrations following cessation of each constant infusion. Concentrations of GH and
pegvisomant were measured in separate, noncross-reactive, two-site monoclonal,
immunofluorometric assays. Pegvisomant concentrations averaged 4860 +/- 480 mug/liter (+/SEM) across the infusion interval, thus exceeding low steady state GH concentrations by 3000fold. Inhibitory efficacy of the GH receptor antagonist peptide was affirmed by way of a 34%
reduction in the serum total IGF-I concentration, i.e., from 257 +/- 37 (placebo) to 170 +/- 24
(drug) mug/liter (P < 0.001); and a reciprocal 77% elevation of the (10-h) mean GH
concentration, i.e., from 1.3 +/- 0.23 (placebo) to 2.3 +/- 0.42 (drug) mug/liter (P = 0.003).
ANOVA disclosed that prior administration of pegvisomant (compared with placebo) did not
alter: 1) the calculated half-life (minutes) of secreted GH, which averaged 15 +/- 1.3 (placebo)
and 14 +/- 0.69 (drug); 2) the half-time of disappearance (minutes) of an iv pulse of rhGH, 15 +/1.0 (placebo) and 13 +/- 0.5 (drug) (for the 10 mug/kg dose); 3) the distribution volume
(milliliters per kilogram) of rhGH, 59 +/- 6.2 (placebo) and 58 +/- 3.5 (drug); 4) the steady state
GH concentration (micrograms per liter) attained during constant iv infusion of rhGH (at a rate
of 5 mug/kg every 2 h), 18.2 +/- 2.4 (placebo) and 18.3 +/- 2.3 (drug); 5) the half-life (minutes)
of elimination of GH from equilibrium, 16 +/- 0.98 (placebo) and 16 +/- 1.8 (drug); and 6) the
steady state MCR (liters per kilogram per day) of rhGH, 3.8 +/- 0.32 (placebo) and 3.5 +/- 0.31
(drug). In ensemble, the present data refute the a priori postulate that vascular-accessible GH
receptors determine the in vivo pseudoequilibrium kinetics of GH disappearance in the human.
KeyWords Plus:
BINDING-PROTEIN, METABOLIC-CLEARANCE, ANTAGONIST PEGVISOMANT,
EXTRACELLULAR DOMAIN, LUTEINIZING-HORMONE, RATIONAL DESIGN,
PLASMA-INSULIN, RENAL-FAILURE, RAT-LIVER, PROFILES
Addresses:
Veldhuis JD, Mayo Clin, Mayo Clin & Mayo Grad Sch Med, Dept Internal Med, Div
Endocrinol, 200 1st St SW, Rochester, MN 55905 USA
Univ Munich, Klinikum Innenstadt, Med Klin, D-80336 Munich, Germany
Univ Virginia, Sch Med, Ctr Biochem Technol, Gen Clin Res Ctr,Div Endocrinol,Dept Internal
Med, Charlottesville, VA 22908 USA
Publisher: ENDOCRINE SOC, BETHESDA
IDS Number: 628DC
ISSN: 0021-972X
**Yazici AN, Chen RV, Solak S, et al.
The analysis of thermoluminescent glow peaks of CaF2 : Dy (TLD-200) after betairradiation
J PHYS D APPL PHYS 35 (20): 2526-2535 OCT 21 2002
The analysis of thermoluminescent glow peaks of CaF2 : Dy (TLD-200) after beta-irradiation
Yazici AN, Chen RV, Solak S, Yegingil Z
JOURNAL OF PHYSICS D-APPLIED PHYSICS
35 (20): 2526-2535 OCT 21 2002
Document type: Article Language: English Cited References: 27 Times Cited: 0
Abstract:
Variable dose (VD), T-m-T-stop, initial rise (IR), variable heating rate (VHR), peak shape (PS)
and computerized glow curve deconvolution (CGCD) methods are used to determine the number
of peaks, the order of kinetics (b), the activation energy (Ea) and attempt-to-escape frequency (s)
associated with the glow peaks in CaF2: Dy (TLD-200) after beta-irradiation between the dose
level 0.1 and 110 Gy. The T-m-T-stop procedure indicates that the glow curve of this crystal
consists of at least nine glow peaks. The dose variation experiment indicates that seven of them,
namely peaks 1-6 and 8, are of first-order kinetics and peaks 7 and 9 are of general-order
kinetics. However, the T-m-T-stop procedure and the CGCD method have indicated that peak 6
has general-order kinetics too. The activation energy found with the IR, VHR, PS and CGCD
methods for peak 4 yield very close values. For all other peaks, there is no agreement between
the results of all the applied methods. This work also indicates that the post-irradiation annealing
and the heating rate have pronounced effects on the evaluated kinetic parameters of all glow
peaks.
KeyWords Plus: PARAMETERS, TL
Addresses:
Yazici AN, Univ Gaziantep, Dept Engn Phys, TR-27310 Gaziantep, Turkey
Univ Gaziantep, Dept Engn Phys, TR-27310 Gaziantep, Turkey
Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel
Aviv, Israel
Cukurova Univ, Dept Phys, TR-01330 Adana, Turkey
Publisher: IOP PUBLISHING LTD, BRISTOL
IDS Number: 613KN
ISSN: 0022-3727
Riabkov DY, Di Bella EVR
Estimation of kinetic parameters without input functions: Analysis of three methods for
multichannel blind identification
IEEE T BIO-MED ENG 49 (11): 1318-1327 NOV 2002
**Larsen MO, Elander M, Sturis J, et al.
The conscious Gottingen minipig as a model for studying rapid pulsatile insulin secretion
in vivo
DIABETOLOGIA 45 (10): 1389-1396 OCT 2002
The conscious Gottingen minipig as a model for studying rapid pulsatile insulin secretion in vivo
Larsen MO, Elander M, Sturis J, Wilken M, Carr RD, Rolin B, Porksen N
DIABETOLOGIA 45 (10): 1389-1396 OCT 2002
Document type: Article Language: English Cited References: 46 Times Cited: 0
Abstract:
Aims/hypothesis. Pulsatile secretion is important for insulin action and suitable animal models
are important tools for examining the role of impaired pulsatile insulin secretion as a possible
link between beta-cell mass, function and morphology and insulin resistance. This study
examines the vascular sampling site, insulin kinetics, pulsatility and the response to glucose
pulse entrainment to evaluate the Gottingen minipig as a model for studying pulsatile insulin
secretion.
Methods. Basal and glucose entrained insulin secretion was examined in normal minipigs and
evaluated by autocorrelation, cross correlation and deconvolution.
Results. Cross correlation showed a relation between oscillations in insulin concentrations in the
portal and jugular vein in anaesthetised animals (p<0.001 in all animals), confirming the
usefulness of jugular vein sampling for pulse detection. Jugular vein sampling in conscious
animals showed obvious oscillations allowing estimates of burst shape and insulin kinetics.
Glucose entrainment improved the pulsatile pattern (autocorrelation: 0.555 +/- 0.148 entrained vs
0.350 +/- 0.197 basal, p=0.054). Deconvolution analysis resolved almost all insulin release as
secretory bursts (69 +/- 20 basal vs 99.5 +/- 1.2% entrained, p<0.01) with a pulse interval (min)
of 6.6 +/- 2.2 (basal) and 9.4 +/- 1.5 (entrained) (p<0.05) and a pulse mass (pmol/l per pulse)
which was higher after entrainment (228 +/- 117 vs 41.2 +/- 18.6 basal, p<0.001).
Conclusion/interpretation. The ability to fit kinetic parameters directly by deconvolution of
peripheral endogenous insulin concentration time series in combination with the suitability of
jugular vein sampling, rapid kinetics and entrainability makes the Gottingen minipig ideal for
mechanistic studies of insulin pulsatility and its effects on insulin action.
Author Keywords:
pulsatile insulin secretion, insulin kinetics, deconvolution, in vivo model, insulin action
KeyWords Plus:
CLINICAL CHEMICAL VALUES, PLASMA-INSULIN, METABOLIC SYNDROME, LIPIDMETABOLISM, GLUCOSE, OSCILLATIONS, PIG, INDUCTION, DELIVERY, MONKEYS
Addresses:
Larsen MO, Novo Nordisk AS, Dept Pharmacol Res 1, Pharmacol, Res & Dev, Novo Alle 6A1005, DK-2880 Bagsvaerd, Denmark
Novo Nordisk AS, Dept Pharmacol Res 1, Pharmacol, Res & Dev, DK-2880 Bagsvaerd,
Denmark
Royal Vet & Agr Univ, Dept Pharmacol & Pathobiol, Copenhagen, Denmark
Novo Nordisk AS, Dept Assay & Cell Technol, DK-2880 Bagsvaerd, Denmark
Aarhus Univ Hosp, Dept Med M, DK-8000 Aarhus, Denmark
Publisher: SPRINGER-VERLAG, NEW YORK
IDS Number: 611DD
ISSN: 0012-186X
*Kitis G, Pagonis V, Carty H, et al.
Detailed kinetic study of the thermoluminescence glow curve of synthetic quartz
RADIAT PROT DOSIM 100 (1-4): 225-228 2002
Detailed kinetic study of the thermoluminescence glow curve of synthetic quartz
Kitis G, Pagonis V, Carty H, Tatsis E
RADIATION PROTECTION DOSIMETRY
100 (1-4): 225-228 2002
Document type: Article Language: English Cited References: 10 Times Cited: 2
Abstract:
A detailed kinetic analysis has been performed of the thermoluminescence (TL) glow curve of
high purity synthetic quartz. The kinetic parameters of the glow peak at 110degreesC were
evaluated for doses ranging from 0.1 Gy to 100 Gy using glow curve deconvolution (GCD),
initial rise, variable heating rate and phosphorescence decay methods. All the methods gave
results that agree within the experimental errors.
KeyWords Plus:
STIMULATED LUMINESCENCE, SUPERLINEARITY
Addresses:
Kitis G, Aristotle Univ Thessaloniki, Phys Nucl Lab, GR-54006 Thessaloniki, Greece
Aristotle Univ Thessaloniki, Phys Nucl Lab, GR-54006 Thessaloniki, Greece
Western Maryland Coll, Dept Phys, Westminster, MD 21158 USA
Publisher: NUCLEAR TECHNOLOGY PUBL, ASHFORD
IDS Number: 609JJ
ISSN: 0144-8420
Kitis G, Furetta C, Sanipoli C
Thermoluminescence properties of LiMgF3 doped with Ce, Er and Dy
RADIAT PROT DOSIM 100 (1-4): 247-250 2002
Thermoluminescence properties of LiMgF3 doped with Ce, Er and Dy
Kitis G, Furetta C, Sanipoli C
RADIATION PROTECTION DOSIMETRY
100 (1-4): 247-250 2002
Document type: Article Language: English Cited References: 10 Times Cited: 0
Abstract:
The main dosimetric properties are reported of a new perovskite. LiMgF3. doped with Ce, Er
and Dy impurities. An annealing temperature of 400degreesC for one hour is necessary to erase
any previous signal and to stabilise its sensitivity. A readout up to 450degreesC gives the same
result. The glow curve structure consists of two intense and isolated glow peaks at 170degreesC
and 315degreesC. The sensitivity of both glow peaks to beta irradiation increases as the dopant
concentration increases. The sensitivity is higher than that of LiF:Mg,Ti using the glow peaks
4+5 integral. Other properties like TL dose response, fading, sensitivity versus successive
readout and annealing cycles, sensitivity versus the heating rate, sensitivity to light and trapping
parameter evaluation were also carried out.
KeyWords Plus:
CURVE DECONVOLUTION FUNCTIONS, CRYSTALS, KINETICS, LUMINESCENCE
Addresses:
Kitis G, Aristotle Univ Thessaloniki, Phys Nucl Lab, GR-54006 Thessaloniki, Greece
Aristotle Univ Thessaloniki, Phys Nucl Lab, GR-54006 Thessaloniki, Greece
Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy
Publisher: NUCLEAR TECHNOLOGY PUBL, ASHFORD
IDS Number: 609JJ
ISSN: 0144-8420
Lee JI, Kim JL, Chang SY, et al.
Analysis of the glow curves obtained from LiF : Mg,Cu,Na,Si TL material using the
general order kinetics model
RADIAT PROT DOSIM 100 (1-4): 341-344 2002
Pagonis V, Tatsis E, Kitis G, et al.
Search for common characteristics in the glow curves of quartz of various origins
RADIAT PROT DOSIM 100 (1-4): 373-376 2002
*Oswald P, Desmet K, Sandra P, et al.
Determination of the enantiomerization energy barrier of some 3-hydroxy-1,4benzodiazepine drugs by supercritical fluid chromatography
J CHROMATOGR B 779 (2): 283-295 NOV 5 2002
http://keszei.chem.elte.hu/DSP/Jchrom779.pdf
Determination of the enantiomerization energy barrier of some 3-hydroxy-1,4-benzodiazepine
drugs by supercritical fluid chromatography
Oswald P, Desmet K, Sandra P, Krupcik J, Majek P, Armstrong DW
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE
BIOMEDICAL AND LIFE SCIENCES
779 (2): 283-295 NOV 5 2002
Document type: Article Language: English Cited References: 46 Times Cited: 0
Abstract:
The first-order kinetic equation for irreversible reactions was used to determine the
enantiomerization barrier of some of 3-hydroxy-1,4-benzodiazepine enantiomers by supercritical
fluid chromatography (SFC). The racemates of lorazepam, oxazepam and temazepam were
separated by SFC on chiral (R,R)-Whelk-O1 column with supercritical carbon dioxide
containing 12.5% methanol and 0.5% diethylamine as a mobile phase. Peak areas of enantiomers
prior to (A(AO), A(BO)) and after the separation (A(A), A(B),), used for calculation of the
enantiomerization barrier, were determined by computer-assisted peak deconvolution of peak
clusters from the chromatograms. It was demonstrated for the first time that using a model for a
four-peak cluster produces height precise results, and most closely approximates the published
results. The kinetic equation for irreversible reactions was used to determine apparent
enantiomerization rate constants. The dependence of the apparent enatiornerization barrier
(DeltaG(A-->B)(app), DeltaG(B-->A)(app)) on temperature was used to determine apparent
activation enthalpy (DeltaH(R-->S)(app), DeltaH(S-->R)(app)) and entropy (DeltaS(R->S)(app), DeltaS(S-->R)(app)) for all studied benzodiazepines. Elsevier Science B.V. All rights
reserved.
Author Keywords:
enantiomerization energy barrier, enantiomer separation, lorazepam, temazepam, oxazepam
KeyWords Plus:
HUMAN-SERUM-ALBUMIN, PERFORMANCE LIQUID-CHROMATOGRAPHY, CHIRAL
STATIONARY-PHASE, COMPUTER-SIMULATION, GAS-CHROMATOGRAPHY,
ENANTIOSELECTIVE SEPARATION, INTERCONVERSION PROFILES, COLUMN,
HPLC, BENZODIAZEPINES
Addresses:
Krupcik J, Slovak Univ Technol, Dept Analyt Chem, Radlinskeho 9, Bratislava 81237, Slovakia
Slovak Univ Technol, Dept Analyt Chem, Bratislava 81237, Slovakia
State Univ Ghent, Dept Organ Chem, B-9000 Ghent, Belgium
Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA
Publisher: ELSEVIER SCIENCE BV, AMSTERDAM
IDS Number: 609ZR
ISSN: 1570-0232
**Ros JMG, Kitis G
Computerised glow curve deconvolution using general and mixed order kinetics
RADIAT PROT DOSIM 101 (1-4): 47-52 2002
Computerised glow curve deconvolution using general and mixed order kinetics
Ros JMG, Kitis G
RADIATION PROTECTION DOSIMETRY 101 (1-4): 47-52 2002
Document type: Article Language: English Cited References: 10 Times Cited: 0
Abstract:
Some accurate glow curve fitting functions for general and mixed order kinetics glow peaks are
proposed and discussed. These mathematical expressions are used together with peak search and
non-linear minimisation algorithins in order to provide a fast glow curve deconvolution for those
materials which cannot he well fitted using first order kinetics. To test the accuracy of the
proposed method, the result of the fitting of synthetic glow Curves is compared with the original
data giving negligible errors for values of parameters currently found in TL materials.
KeyWords Plus:
DOSIMETRY
Addresses:
Ros JMG, CIEMAT, Av Complutense 22, E-28040 Madrid, Spain
CIEMAT, E-28040 Madrid, Spain
Aristotle Univ Thessaloniki, Nucl Phys Lab, GR-54006 Thessaloniki, Greece
Publisher: NUCLEAR TECHNOLOGY PUBL, ASHFORD
IDS Number: 609JM
ISSN: 0144-8420
Biderman S, Horowitz YS, Oster L, et al.
Glow curve analysis of composite peak 5 in LiF : Mg,ti (TLD-100) using optical
bleaching, thermal annealing and computerised glow curve deconvolution
RADIAT PROT DOSIM 101 (1-4): 69-72 2002
*Pagonis V, Kitis G
On the possibility of using commercial software packages for thermoluminescence glow
curve deconvolution analysis
RADIAT PROT DOSIM 101 (1-4): 93-98 2002
On the possibility of using commercial software packages for thermoluminescence glow curve
deconvolution analysis
Pagonis V, Kitis G
RADIATION PROTECTION DOSIMETRY 101 (1-4): 93-98 2002
Document type: Article Language: English Cited References: 10 Times Cited: 0
Abstract:
This paper explores the possibility of using commercial software for thermoluminescence glow
curve deconvlution (GCD) analysis. The program PEAKFIT has been used to perform GCD
analysis of complex glow curves of quartz and dosimetric materials. First-order TL peaks were
represented Successfully using the Weibull distribution function. Second-order and general-order
TL peaks were represented accurately by using the Logistic asymmetric functions with varying
symmetry parameters. Analytical expressions were derived for determining the energy E front
the parameters of the Logistic asymmetric functions. The accuracy of these analytical
expressions for E was tested for it wide variety of kinetic parameters and was found to be
comparable to the commonly used expressions in the TL literature. The effectiveness of fit of the
analytical functions used here was tested using the figure of merit (FOM) and was found to be
comparable to the accuracy of recently published GCD expressions for first- and general-order
kinetics.
KeyWords Plus:
ANALYSIS COMPUTER-PROGRAMS, FIT
Addresses:
Pagonis V, Western Maryland Coll, Dept Phys, Westminster, MD 21158 USA
Western Maryland Coll, Dept Phys, Westminster, MD 21158 USA
Aristotle Univ Thessaloniki, Nucl Phys Lab, GR-54006 Thessaloniki, Greece
Publisher: NUCLEAR TECHNOLOGY PUBL, ASHFORD
IDS Number: 609JM
ISSN: 0144-8420
*Sartorio A, De Nicolao G, Liberati D
An improved computational method to assess pituitary responsiveness to secretagogue
stimuli
EUR J ENDOCRINOL 147 (3): 323-332 SEP 2002
An improved computational method to assess pituitary responsiveness to secretagogue stimuli
Sartorio A, De Nicolao G, Liberati D
EUROPEAN JOURNAL OF ENDOCRINOLOGY 147 (3): 323-332 SEP 2002
Document type: Article Language: English Cited References: 20 Times Cited: 0
Abstract:
Objective: The quantitative assessment of gland responsiveness to exogenous stimuli is typically
carried out using the peak value of the hormone concentrations in plasma, the area under its
curve (AUC), or through deconvolution analysis. However, none of these methods is
satisfactory, due to either sensitivity to measurement errors or various sources of bias. The
objective was to introduce and validate an easy-to-compute responsiveness index, robust in the
face of measurement errors and interindividual variability of kinetics parameters.
Design: The new method has been tested on responsiveness tests for the six pituitary hormones
(using GH-releasing hormone, thyrotrophin-releasing hormone, gonadotrophin-releasing
hormone and corticotrophin-releasing hormone as secretagogues), for a total of 174 tests.
Hormone concentrations were assayed in six to eight samples between -30 min and 120 min
from the stimulus.
Methods: An easy-to-compute direct formula has been worked out to assess the 'stimulated
AUC', that is the part of the AUC of the response curve depending on the stimulus, as opposed to
pre- and post-stimulus spontaneous secretion. The weights of the formula have been reported for
the six pituitary hormones and some popular sampling protocols.
Results and Conclusions: The new index is less sensitive to measurement error than the peak
value. Moreover, it provides results that cannot be obtained from a simple scaling of either the
peak value or the standard AUC. Future studies are needed to show whether the reduced
sensitivity to measurement error and the proportionality to the amount of released hormone
render the stimulated AUC indeed a valid alternative to the peak value for the diagnosis of the
different pathophysiological states, such as, for instance, GH deficits.
KeyWords Plus:
GROWTH-HORMONE, METABOLIC-CLEARANCE, DECONVOLUTION, SECRETION,
DEFICIENCY, LH
Addresses:
Sartorio A, IRCCS, Ist Auxol Italiano, LSRE, Via Ariosto 13, I-20145 Milan, Italy
IRCCS, Ist Auxol Italiano, LSRE, I-20145 Milan, Italy
IRCCS, Ist Auxol Italiano, Div Malattie Metab 3, Piancavallo, Verbania, Italy
Univ Pavia, Dipartimento Informat & Sistemist, I-27100 Pavia, Italy
Politecn Milan, Dipartimento Elettr & Informat, CESTIA, Consiglio Nazl Ric, I-20133 Milan,
Italy
Publisher: BIO SCIENTIFICA LTD, BRISTOL
IDS Number: 606QD
ISSN: 0804-4643
*Diethelm S, Closset A, Van herle J, et al.
Determination of chemical diffusion and surface exchange coefficients of oxygen by
electrochemical impedance spectroscopy
J ELECTROCHEM SOC 149 (11): E424-E432 NOV 2002
Determination of chemical diffusion and surface exchange coefficients of oxygen by
electrochemical impedance spectroscopy
Diethelm S, Closset A, Van herle J, Nisancioglu K
JOURNAL OF THE ELECTROCHEMICAL SOCIETY 149 (11): E424-E432 NOV 2002
Document type: Article Language: English Cited References: 27 Times Cited: 0
Abstract:
A rigorous mathematical model is developed for the complex impedance of a solid-state
electrochemical cell, which is commonly used for the measurement of oxygen transport, oxygen
exchange kinetics, and thermodynamic properties of nonstoichiometric mixed conducting oxides.
The model leads to a simple equivalent circuit for the cell with unambiguous definition of the
physical significance of its components. A method is proposed for the analysis of experimental
data. The methodology thus developed is validated by comparing the experimental data
measured for a well-studied perovskite (SrCo(0.5)Fe(0.5)O(32)d) with the results obtained from
the completely equivalent potential-step technique. In addition, various electrochemical
properties of the other cell components, such as Pt electrodes and yttria-stabilized zirconia
electrolyte, also obtainable from measurements, show good agreement with the available
literature data. The cell design, which significantly minimizes the gas space in contact with the
sample, has a clear advantage over similar relaxation cells in terms of reducing the dominating
effect of the gas-phase capacitance in numerical data analysis. A possible disadvantage,
however, is the large impedance of the oxygen pump at low oxygen partial pressures, which may
in a similar manner obstruct deconvolution of the sample properties from the measured data. (C)
2002 The Electrochemical Society.
KeyWords Plus:
YTTRIA-STABILIZED ZIRCONIA, MIXED CONDUCTORS, TRANSPORT,
CONDUCTIVITY, INTERFACE, OXIDES
Addresses:
Diethelm S, EPFL, Lab Energet Ind, CH-1015 Lausanne, Switzerland
Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
Norwegian Univ Sci & Technol, Dept Mat Technol & Electrochem, N-7491 Trondheim, Norway
Publisher: ELECTROCHEMICAL SOC INC, PENNINGTON
IDS Number: 604KV
ISSN: 0013-4651
Rall LC, Walsmith JM, Snydman L, et al.
Cachexia in rheumatoid arthritis is not explained by decreased growth hormone secretion
ARTHRITIS RHEUM 46 (10): 2574-2577 OCT 2002
Cachexia in rheumatoid arthritis is not explained by decreased growth hormone secretion
Rall LC, Walsmith JM, Snydman L, Reichlin S, Veldhuis JD, Kehayias JJ, Abad LW, Lundgren
NT, Roubenoff R
ARTHRITIS AND RHEUMATISM 46 (10): 2574-2577 OCT 2002
Document type: Article Language: English Cited References: 18 Times Cited: 0
Abstract:
Objective. Patients with rheumatoid arthritis (RA) lose body cell mass (BCM) by unknown
mechanisms. Since the loss of BCM in normal aging individuals parallels the characteristic agerelated decline in growth hormone (GH) secretion, this study was carried out to determine
whether further decreased GH secretion plays a role in the pathogenesis of this loss of BCM in
RA patients, termed "rheumatoid cachexia."
Methods. GH secretory kinetics were determined by deconvolution analysis in 16 patients with
RA and 17 healthy controls matched for age (mean +/- SD 45.4 +/- 13.2 years and 47.1 +/- 14.6
years, respectively), sex, race, and body mass index. Blood samples were obtained every 20
minutes for 24 hours. Body composition was ascertained using total-body potassium (TBK) as a
measure of BCM and dual x-ray absorptiometry to determine fat mass.
Results. BCM was reduced in patients with RA compared with healthy controls (mean +/- SD
gm TBK 79.5 +/- 9.5 versus 94.9 +/- 1.9, P < 0.0005), but there was no difference in fat mass.
GH kinetic parameters in patients with RA did not differ from those in controls.
Conclusion. These findings suggest that GH kinetics are unaltered in RA patients compared with
healthy subjects; thus, GH deficiency does not account for rheumatoid cachexia.
KeyWords Plus:
TUMOR-NECROSIS-FACTOR, CHRONIC INFLAMMATION, BODY-COMPOSITION,
POSTMENOPAUSAL WOMEN, MASS, STRENGTH
Addresses:
Roubenoff R, Tufts Univ, Nutr Exercise Physiol & Sarcopenia Lab, Jean Mayer USDA HNRCA,
711 Washington St, Boston, MA 02111 USA
Tufts Univ, Nutr Exercise Physiol & Sarcopenia Lab, Jean Mayer USDA HNRCA, Boston, MA
02111 USA
Univ Arizona, Coll Med, Tucson, AZ USA
Univ Virginia, Hlth Sci Ctr, Charlottesville, VA 22903 USA
Tufts Univ New England Med Ctr, Boston, MA 02111 USA
Publisher: WILEY-LISS, NEW YORK
IDS Number: 604QX
ISSN: 0004-3591
*Suda Y, Ono T, Akazawa M, et al.
Preparation of carbon nanoparticles by plasma-assisted pulsed laser deposition method size and binding energy dependence on ambient gas pressure and plasma condition
THIN SOLID FILMS 415 (1-2): 15-20 AUG 1 2002
http://keszei.chem.elte.hu/DSP/ThinSolidFilm415.pdf
Preparation of carbon nanoparticles by plasma-assisted pulsed laser deposition method - size and
binding energy dependence on ambient gas pressure and plasma condition
Suda Y, Ono T, Akazawa M, Sakai Y, Tsujino J, Homma N
THIN SOLID FILMS 415 (1-2): 15-20 AUG 1 2002
Document type: Article Language: English Cited References: 26 Times Cited: 0
Abstract:
Nanometer-size carbon particles were prepared on a Si substrate using pulsed laser deposition
(PLD) assisted by radio frequency (RF) Ar plasma and were compared with ones prepared by
PLD in vacuum and Ar gas. In both the plasma and gas ambiences, experiments were carried out
in Ar pressure p(Ar) ranging from 0.13 to 13 Pa. The particle size increased as p(Ar) increased.
However, the size obtained in the RF Ar plasma was approximately 1.5 times larger than that
prepared in the Ar gas. An X-ray photoelectron spectroscopy (XPS) analysis revealed that the
carbon film covered by the particles was in an amorphous state. The sp(3)/sp(2) carbon ratio of
the film was evaluated by deconvolution of XPS carbon (Is) spectra into three components,
which are attributed to diamond (sp(3)), graphite (sp(2)) and carbon oxide components. The
highest sp(3) /sp(2) ratio was 0.4 in the Ar gas and Ar plasma at p(Ar) = 0.13 Pa. The sp(3)
/sp(2) ratio decreases monotonously, as the particle size increases. The ratio obtained in the Ar
plasma is larger than that in the Ar gas. The effects of p(Ar) and plasma for nanoparticle
characteristics are discussed. (C) 2002 Elsevier Science B.V. All rights reserved.
Author Keywords:
nanoparticle, laser ablation, carbon, RF plasma, amorphous materials
KeyWords Plus:
DIAMOND-LIKE-CARBON, ION KINETIC-ENERGY, SUBPLANTATION MODEL, FILM
GROWTH, ABLATION, SP(3), WAVELENGTH, PARTICLES, EMISSION, XPS
Addresses:
Sakai Y, Hokkaido Univ, Grad Sch Engn, Dept Ingn Elect & Informat, North 13,West 8,
Sapporo, Hokkaido 0608628, Japan
Hokkaido Univ, Grad Sch Engn, Dept Ingn Elect & Informat, Sapporo, Hokkaido 0608628,
Japan
Hokkaido Elect Power Co Inc, Ebetsu, Hokkaido 0670033, Japan
Publisher: ELSEVIER SCIENCE SA, LAUSANNE
IDS Number: 596ZW
ISSN: 0040-6090
Earnhardt RC, Veldhuis JD, Cornett G, et al.
Pathophysiology of hyperinsulinemia following pancreas transplantation - Altered
pulsatile versus basal insulin secretion and the role of specific transplant anatomy in dogs
ANN SURG 236 (4): 480-491 OCT 2002
**Nugent-Glandorf L, Scheer M, Samuels DA, et al.
Ultrafast photodissociation of Br-2: Laser-generated high-harmonic soft x-ray probing of
the transient photoelectron spectra and ionization cross sections
J CHEM PHYS 117 (13): 6108-6116 OCT 1 2002
http://keszei.chem.elte.hu/DSP/JCP117.pdf
Ultrafast photodissociation of Br-2: Laser-generated high-harmonic soft x-ray probing of the
transient photoelectron spectra and ionization cross sections
Nugent-Glandorf L, Scheer M, Samuels DA, Bierbaum VM, Leone SR
JOURNAL OF CHEMICAL PHYSICS 117 (13): 6108-6116 OCT 1 2002
Document type: Article Language: English Cited References: 28 Times Cited: 0
Abstract:
The ultrafast dissociation of gas-phase Br-2 is probed via a 400 nm pump soft-x-ray probe
scheme at five different high-order harmonic wavelengths (13th, 15th, 17th, 19th, and 21st of an
800 nm Ti:sapphire laser). A series of time-resolved ultrafast photoelectron spectra reveals
prompt two-photon ionization features, which allow in situ measurement of the cross correlation
between the pump and probe pulses. Transient features are attributed to ionization of the
dissociative excited state wave packet, and new spectral peaks are associated with the formation
of atomic Br. Deconvolution of time-trace plots of the atomic signals with the cross-correlation
pulse durations reveal similar dissociation times (similar to40 fs) at two probe wavelengths (47
and 42 nm). Analysis of the transient wave packet photoelectron signal suggests an ionization
process that occurs during dissociation, with a broad electron kinetic energy distribution at an
extended Br-Br bond length (R greater than or equal to3 Angstrom). At long delay times (greater
than or equal to500 fs), an enhancement of the ionization cross section of the Br atom compared
to the Br-2 molecule is observed with each of the probe wavelengths, the ratio increasing from a
factor of 21+/-1 to 56+/-5 for probe wavelengths of 61.5 to 38 nm, respectively. The intensity of
the transient wave packet signal on the dissociative state remains nearly constant between the
17th and 19th harmonic probes, indicating that the ionization cross section of the dissociative
state has an entirely different wavelength dependence than the Br atom. The transient wave
packet ionization signal is qualitatively 10%-20% of the simultaneous two-photon (400 nm+soft
x-ray) ionization signal. The results are discussed in terms of the transient dynamics of
dissociative state photoelectron spectroscopy, the correlation between molecular and atomic
ionization probabilities, and above threshold ionization probabilities. (C) 2002 American
Institute of Physics.
KeyWords Plus:
HIGH-ORDER HARMONICS, SPECTROSCOPY, DYNAMICS, PULSES, PHASE
Addresses:
Nugent-Glandorf L, Nortel Networks, M-S 04332F15, Nepean, ON K2H 8E9, Canada
Natl Inst Stand & Technol, Joint Inst Lab Astrophys, Dept Phys, Dept Chem & Biochem,
Boulder, CO 80309 USA, Univ Colorado, Boulder, CO 80309 USA
Publisher: AMER INST PHYSICS, MELVILLE
IDS Number: 593BV
ISSN: 0021-9606

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EUR J NUCL MED 26 (12): 1580-1588 DEC 1999
Ropelato MG, Garcia-Rudaz MC, Castro-Fernandez C, et al.
A preponderance of basic luteinizing hormone (LH) isoforms accompanies inappropriate
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J CLIN ENDOCR METAB 84 (12): 4629-4636 DEC 1999
Wu XN, Yamashita F, Hashida M
Deconvolution analysis for absorption and metabolism of aspirin in microcapsules
BIOL PHARM BULL 22 (11): 1212-1216 NOV 1999