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2 results about "Estriol" patented technology
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Estriol (E3), also spelled oestriol, is a steroid, a weak estrogen, and a minor female sex hormone. It is one of three major endogenous estrogens, the others being estradiol and estrone. Levels of estriol in women who are not pregnant are almost undetectable. However, during pregnancy, estriol is synthesized in very high quantities by the placenta and is the most produced estrogen in the body by far, although circulating levels of estriol are similar to those of other estrogens due to a relatively high rate of metabolism and excretion. Relative to estradiol, both estriol and estrone have far weaker activity as estrogens.
Intermittent electrocatalytic treatment method for trace estrogen in reclaimed water
This invention relates to the field of water treatment technology and discloses an intermittent electrocatalytic treatment method for trace estrogen in reclaimed water. The method is carried out in a three-dimensional electrode reactor. Before formal treatment, a pre-treated water sample containing the estrogen to be removed is used to pre-saturate the particle electrode. Subsequently, reclaimed water containing one or more estrogenic pollutants is continuously introduced into the reactor, operating at a current density of 1.0–10.0 mA / cm², a hydraulic retention time of 5–20 min, and an aeration rate of 0–3.0 L / min. An intermittent power supply mode with alternating power on and off is employed, wherein the ratio of power on time to power off time is 1:1, and the power off time is 2–120 s. During the power off phase, the estrogen to be removed accumulates on the surface of the particle electrode. During the power on phase, the particle electrode repolarizes to form a micro-battery and undergoes electrochemical oxidation in conjunction with the anode, causing direct oxidation and / or indirect oxidation mediated by an electrogenerated oxidant, while the particle electrode achieves in-situ regeneration. The method is applicable to the treatment of trace amounts of estrogens in reclaimed water, preferably one or more of estrone (E1), 17β-estradiol (E2), estriol (E3), 17α-ethinylestradiol (EE2), and bisphenol A (BPA). This invention can reduce the artificially inflated impact of adsorption on the evaluation of treatment effectiveness, and reduce energy consumption while ensuring treatment efficiency.
Owner:ZHENGZHOU UNIV
Estriol vaginal ring
Disclosed is a vaginal ring delivering estriol. The ring is suitable for use in the treatment of vaginal and vulva atrophy. It has a core-shell structure of ethylene vinyl acetate copolymers. Both the core and the shell are loaded with estriol, with the concentration of estriol in the core exceeding that in the shell. The core and shell have a different copolymer composition, with the vinyl acetate in the core being higher than that in the shell.
Owner:VARI BIOSCIENCE GMBH