• Publications
  • Influence
Salivary cortisol testing in children.
  • N. A. Schmidt
  • Medicine
  • Issues in comprehensive pediatric nursing
  • 1 July 1997
Biological markers can identify links between human biology and human behavior. Cortisol, a marker of hypothalamic-pituitary-adrenocortical axis function, is a useful measure in research. NewerExpand
  • 63
  • 3
Steroid profiling--an update.
Extraction of steroids from urine with C18 solid-phase extraction cartridges results in an extract containing impurities. If, during the extraction of hydrolyzed urine, an amino (NH2) column isExpand
  • 46
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Coercive force and 90° domain wall motion in ferroelectric PLZT ceramics with square hysteresis loops
The polarization reversal of some tetragonal-phase PLZT ceramics is studied. The results are explained in terms of 90° domain wall motions. A reported theory originally derived for rhombohedral-phaseExpand
  • 54
  • 2
Profiling urinary steroids. A reliable procedure.
Abstract A relatively simple method of gas chromatography, permiting the quantitative estimation of the most important urinary 17-ketosteroids and 17-OH corticosteroids, is reported. The procedureExpand
  • 19
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Steroid profile for urine: reference values.
We describe a project, participated in by 24 institutions in The Netherlands and Belgium, to determine normal reference values for steroids in urine by capillary gas chromatography. Urine samplesExpand
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Application of diethylstilbestrol dipropionate in bulls. I. Excretion of residues in urine and faeces and histological and immunohistochemical changes in the prostate.
In this experiment 20 one year old bulls received a single intramuscular injection of the anabolic preparation diethylstilbestrol dipropionate (DES-DP) (an oil preparation or an emulsion). FourExpand
  • 7
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Correction of instrument- and reagent-based differences in determination of the International Normalized Ratio (INR) for monitoring anticoagulant therapy.
As recommended by the World Health Organization, standardization of prothrombin time assays involves conversion of prothrombin times into International Normalized Ratios (INR). We investigated theExpand
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A rapid method for the assay of oestriol and pregnanolone in pregnancy urine
Abstract A simple, rapid and accurate method for assaying the above steroids is described. Hydrolysis of the steroid conjugates is performed under optimum conditions.
  • 23
Gas chromatography in the estimation of urinary metanephrines and VMA.
Abstract Urine is extracted with ethyl acetate at a highly acid pH. Hydrolysis of the aqueous phase by hydrochloric acid is followed by oxidation of the metanephrines to vanillin using sodiumExpand
  • 26
Photometric assay of differentiated oestrogens in urine following enzyme hydrolysis and gel filtration.
Abstract A relatively simple and accurate method is described for the assay of oestrone, oestradiol-17β and oestriol in low-titre urines. Enzyme hydrolysis of the specimen of urine is followed byExpand
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