منابع مشابه
The relative transfer of estrogens and their sulfates across the guinea pig placenta: sulfurylation of estrogens by the placenta.
In a recent report from these laboratories (2), an in situ perfusion method was described which could be used to measure the transfer of substances in either direction across the guinea pig placenta. When the procedure was applied to the estrogens, it was found that the unconjugated hormones, estrone, estradiol170, and estriol were transferred quickly under conditions in which the placenta pose...
متن کاملThe separation of natural estrogens by countercurrent distribution.
The development of fluorometric methods (l-4) for the quantitative estimation of estrogens in the small quantities present in human urine has opened the way for improvements in the procedures utilized for the extraction and separation of these compounds. A study of the partition coefficients of estrone, estradiol-178,’ and estriol in various solvent systems has been of great value in the develo...
متن کاملQuantitative fluorometric method for the determination of the natural estrogens.
This communication deals principally with the development of a method for the quantitative fluorometric measurement of the natural estrogens and introduces data on a similar test method for the quantitative determination of cholesterol. To achieve this goal, use has been made of the condensat.ion reaction of phenolic steroids with phthalic anhydride (1, 2). In view of the wide-spread interest i...
متن کاملNatural estrogens: a review of the primary literature.
Andrew Glasnapp, RPh, FIACP, PharmD Professional Compounding Centers of America, Inc. 9901 S. Wilcrest, Houston, TX 77099 The average age of women at menopause has remained approximately 50.4 years for centuries.1 Thus, women today may spend 30% of their lives with reduced ovarian hormonal concentrations. It is estimated that 75% to 85% may develop symptoms secondary to this hormonal decline th...
متن کاملTheoretical study of the effect of hydrogen addition to natural gas-fueled direct-injection engines
The preparation of air–fuel mixture is considerably dependent on fluid flow dynamics to achieve improved performance, efficiency, and engine combustion in the appearance of flow. In this study, the effects of mixtures of hydrogen and compressed natural gas (CNG) on a spark ignition engine are numerically considered. This article presents the results of a direct-injection engine using methane–hy...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1968
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.22-0254