6125 results
Cited 3 times since 1988 (0.1 per year)
source: EuropePMC
Journal of pharmaceutical and biomedical analysis,
Volume 6, Issue 6-8, 1 1 1988, Pages 895-902
Evaluation of sample work-up methods and internal standards for the determination of catecholamines in urine by HPLC with electrochemical detection.
Claeys M, Schepers A, Dillen L, De Potter WP
Two sample work-up methods: (I) one consisting of adsorption of the catecholamines onto alumina followed by ion pair extraction and (II) another consisting of isolation by cation exchange and subsequent adsorption onto alumina, have been evaluated for the assay of urinary catecholamines by means of HPLC with electrochemical detection. With the aim of achieving high precision, two internal standards, i.e. dihydroxybenzylamine and epinine, have been compared. The results indicate that clean HPLC c...
Abstract
Ankara Universitesi Dis Hekimligi Fakultesi dergisi = The Journal of the Dental Faculty of Ankara University,
Volume 14, Issue 3, 1 1 1987, Pages 303-306
[The influence of Visco-Gel and Voco-Pak tissue conditioning materials on the bacterial lesion floras of the patients with vestibuloplasties].
Misirligil A, Güngör N, Yilmaz D
Abstract
Cited 16 times since 1987 (0.4 per year)
source: EuropePMC
Research communications in chemical pathology and pharmacology,
Volume 57, Issue 1, 1 1 1987, Pages 15-32
Quantification of myocardial necrosis and cardiac hypertrophy in isoproterenol-treated rats.
Knufman NM, van der Laarse A, Vliegen HW, Brinkman CJ
Administration of a single high dose or multiple low doses of isoproterenol (ISO) to rats induces myocardial necrosis and cardiac hypertrophy. To assess the extent of necrosis we measured myocardial activities of creatine kinase (CK) and aspartate aminotransferase (AST) in the first days after ISO-treatment. After a single high dose and multiple low doses of ISO, necrosis was 10% and 25%, respectively. To quantify the degree of hypertrophy we measured heart weight and myocyte volume, and calcula...
Abstract
Cited 24 times since 1987 (0.6 per year)
source: EuropePMC
Cardiovascular research,
Volume 21, Issue 5, 1 1 1987, Pages 352-357
Morphometric quantification of myocyte dimensions validated in normal growing rat hearts and applied to hypertrophic human hearts.
Vliegen HW, van der Laarse A, Huysman JA, Wijnvoord EC, Mentar M, Cornelisse CJ, Eulderink F
To obtain quantitative information on changes in myocyte size in hearts with increased myocardial mass light microscopical morphometry was used in fixed and stained myocardial tissue sections. A modification of the azan staining procedure made longitudinal (sarcolemma) and transverse (intercalated discs) boundaries visible with a contrast that allowed morphometric analysis. The method was validated in left ventricular tissue of rats ranging in age from 4 to 17 weeks. Myocyte width, cut surface a...
Abstract
Ankara Universitesi Dis Hekimligi Fakultesi dergisi = The Journal of the Dental Faculty of Ankara University,
Volume 14, Issue 2, 1 1 1987, Pages 209-212
[Odontogenic myxoma].
Türker M, Güngör N, Yücetaş S, Yilmaz D, Günhan O
Abstract
Cited 7 times since 1987 (0.2 per year)
source: EuropePMC
Cardiovascular research,
Volume 21, Issue 3, 1 1 1987, Pages 223-229
Relation between ventricular DNA content and number of myocytes and non-myocytes in hearts of normotensive and spontaneously hypertensive rats.
van der Laarse A, Bloys van Treslong CH, Vliegen HW, Ricciardi L
Myocardial DNA concentration and ventricular weight were measured in the hearts of normal and spontaneously hypertensive rats varying in age from 1 day to 1 year and the ventricular DNA content calculated. A linear relation between ventricular DNA content and ventricular weight was observed in both rat strains. This linear relation was deduced theoretically, assuming that the number of ventricular non-myocytes per heart was proportional to ventricular weight and that the number of ventricular my...
Abstract
Hormone research,
Volume 27, Issue 4, 1 1 1987, Pages 195-199
Bromocriptine is unable to suppress TRH-stimulated beta-endorphin/beta-lipotropin and cortisol secretion in normal pregnant women after delivery.
Lamberts SW, Angement R, van der Heijden A, Wladimiroff JW, Hackeng WH, de Jong FH
The course of plasma beta-endorphin/beta-lipotropin, cortisol and prolactin (PRL) levels was followed from 0.5 till 5 h after normal delivery in 13 healthy women. Six subjects who did not want to breast-feed their child received 2.5 mg bromocriptine orally 1 h after delivery. After 3 h the effect of the intravenous administration of 200 micrograms thyrotropin-releasing hormone (TRH) was also measured. Elevated plasma beta-endorphin and cortisol levels decreased after delivery in a (log) linear f...
Abstract
Bollettino della Societa italiana di biologia sperimentale,
Volume 62, Issue 1, 1 1 1986, Pages 89-93
[Mechanical and structural variations in the hypertrophic myocardium of trained swimming rats].
Ricciardi L, ter Keurs HE, vd Laarse A, Vliegen HW
Abstract
Cited 8 times since 1986 (0.2 per year)
source: EuropePMC
Histochemistry,
Volume 84, Issue 4-6, 1 1 1986, Pages 348-354
Methodological aspects of flow cytometric analysis of DNA polyploidy in human heart tissue.
Vliegen HW, Vossepoel AM, van der Laarse A, Eulderink F, Cornelisse CJ
The purpose of the study was to investigate the possibilities of flow cytometry (FCM) for the analysis of DNA polyploidy in human heart tissue. Suspensions of single nuclei were prepared with the detergent-trypsin procedure and stained with propidium iodide. A mathematical correction procedure was developed to correct for background and clumping. For diploid model populations of chicken and trout red blood cells this correction reduced artifactual fractions in the FCM DNA profile to less than 0....
Abstract
Cited 19 times since 1986 (0.5 per year)
source: EuropePMC
Journal of biomechanics,
Volume 19, Issue 10, 1 1 1986, Pages 799-805
Fluid shear as a possible mechanism for platelet diffusivity in flowing blood.
Aarts PA, Steendijk P, Sixma JJ, Heethaar RM
Platelet transport theory is based on convection diffusion and describes adequately the influence of wall shear rate, platelet concentration and axial (down stream) position. Until now, the influence of the predominant factors affecting platelet adherence, the hematocrit and the red cell size, was not included in this theory. Their role remained hidden in the platelet diffusivity (Dw), which was assumed to be related to the shear rate (gamma) expressed in s-1 by a power law function Dw = m gamma...
Abstract
Cited 523 times since 1984 (13 per year)
source: EuropePMC
Circulation,
Volume 70, Issue 5, 1 1 1984, Pages 812-823
Continuous measurement of left ventricular volume in animals and humans by conductance catheter.
Baan J, van der Velde ET, de Bruin HG, Smeenk GJ, Koops J, van Dijk AD, Temmerman D, Senden J, Buis B
An eight-electrode conductance catheter previously developed by us and used to determine stroke volume in dogs was applied in human beings and dogs to measure absolute left ventricular volume quantitatively. For calibration we developed the formula V(t) = (1/alpha)(L2/sigma b)G(t) - Vc, where V(t) is time-varying left ventricular volume, alpha is a dimensionless constant, L is the electrode separation, sigma b is the conductivity of blood obtained by a sampling cuvette, and G(t) is the measured...
Abstract
Cited 22 times since 1984 (0.5 per year)
source: EuropePMC
Journal of applied physiology: respiratory, environmental and exercise physiology,
Volume 56, Issue 4, 1 1 1984, Pages 1053-1059
Breathing pattern during induced bronchoconstriction.
Chadha TS, Schneider AW, Birch S, Jenouri G, Sackner MA
The breathing patterns of normal subjects monitored with respiratory inductive plethysmography were investigated after mild increases in respiratory resistance provoked by aerosolized methacholine during natural breathing and while breathing on a mouthpiece to a pneumotachograph. First, during natural breathing, comparisons of inspiratory ventilation (VI), tidal volume (VT), frequency (f), inspiratory time (TI), fractional inspiratory time (TI/TT), and mean inspiratory flow (VT/TI) were made bef...
Abstract
Cited 7 times since 1982 (0.2 per year)
source: EuropePMC
Clinical science (London, England : 1979),
Volume 63, Issue 5, 1 1 1982, Pages 473-483
Breathing pattern during and after smoking cigarettes.
Tobin MJ, Schneider AW, Sackner MA
Abstract
Cited 167 times since 1982 (3.9 per year)
source: EuropePMC
The American review of respiratory disease,
Volume 125, Issue 6, 1 1 1982, Pages 644-649
Validation of respiratory inductive plethysmography using different calibration procedures.
Chadha TS, Watson H, Birch S, Jenouri GA, Schneider AW, Cohn MA, Sackner MA
We devised a new calibration procedure [least squares method (LSQ)] for respiratory inductive plethysmography (RIP) and compared it with our previously reported simultaneous equation method (SEQ) of analyzing data in 2 body positions and with the method of Stagg and associates using the analysis of individual breaths in a single body position. The values from RIP were compared with simultaneous spirometry (SP) in 20 normal subjects placed in the standing (STD), supine (SUP), sitting, prone, semi...
Abstract
Cited 165 times since 1981 (3.8 per year)
source: EuropePMC
Cardiovascular research,
Volume 15, Issue 6, 1 1 1981, Pages 328-334
Continuous stroke volume and cardiac output from intra-ventricular dimensions obtained with impedance catheter.
Baan J, Jong TT, Kerkhof PL, Moene RJ, van Dijk AD, van der Velde ET, Koops J
To improve assessment of ventricular function during cardiac catheterisation there should be available a continuous registration of stroke volume and cardiac output in addition to ventricular pressure. To obtain the desired volumetric quantities a catheter has been developed which measures changes in intraventricular dimensions by electrical impedance. For this purpose, the catheter is equipped with eight electrodes spaced over a distance equal to the long axis of the left ventricle into which i...
Abstract
Cited 7 times since 1980 (0.2 per year)
source: EuropePMC
Lancet (London, England),
Volume 2, Issue 8206, 1 1 1980, Pages 1241-1242
Hepatitis A in non-human primates in nature.
Smith MS, Swanepoel PJ, Bootsma M
Abstract
Cited 11 times since 1979 (0.2 per year)
source: EuropePMC
Clinical nuclear medicine,
Volume 4, Issue 5, 1 1 1979, Pages 181-190
On the natural history of Plummer's disease.
Wiener JD, de Vries AA
Plummer's disease (autonomous goiter) presents a spectrum of forms, raging from solitary autonomous thyroid nodules to numerous small autonomous areas, and from unequivocal to servere hyperthyroidism. Progression is often very slow, but data on long-term follow up are scare, contradictory and limited to solitary nodules. We re-examined 58 untreated patients on one or more occasions. Follow-up time ranged from 1 to 12 years (average 4 years). There were gross clinical or scintigraphic change...
Abstract
Journal of human nutrition,
Volume 30, Issue 6, 1 1 1976, Pages 377-380
The role of carbohydrates, and of sugar in particular, in our diet.
van Schaik TF, Ing
Abstract
Cited 4 times since 1976 (0.1 per year)
source: EuropePMC
Virology,
Volume 74, Issue 1, 1 1 1976, Pages 232-235
The primary structure of the coat protein of alfalfa mosaic virus (strain 425).
Kraal B, van Beynum GM, De Graaf M, Castel A, Bosch L
Abstract
Cited 7 times since 1975 (0.1 per year)
source: EuropePMC
Zeitschrift fur Lebensmittel-Untersuchung und -Forschung,
Volume 159, Issue 6, 1 1 1975, Pages 337-343
Structure-taste relationship of some sweet-tasting dipeptide esters.
Brussel LB, Peer HG, van der Heijden A
The sweetness of dipeptide esters, structurally related to L-aspartyl-L-phenylalanine methyl ester (Aspartame), depends among other things on molecular size. This paper describes a method for predicting whether a dipeptide ester is sweet or not with the aid of atomic models. The method is based on the determination of the size, length and shape of the side chain (R) of the amino-acid ester attached to L-aspartic acid. We measured the side chains of 28 dipeptide esters, 13 of which were synthesiz...
Abstract
