4 results about "Estrone" patented technology

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.

The application discloses a wheat Tilletia indica-specific biomarker combination, a screening method and application thereof, and the biomarker combination comprises 20-hydroxyarachidonic acid, 1-octadecyl lysophosphatidic acid, linolenic acid, 13-hydroxydocosahexaenoic acid, 4-methoxy estrone, hypoxanthine, 3-hydroxymyristic acid, beta-ecdysterone, 17-phenyltrinorprostaglandin F2 alpha cyclopropylmethylamide, 11,12-dihydroxyeicosatrienoic acid and oxidized octadecadienoic acid. When the biomarker combination is used for identifying Tilletia indica, the time-consuming long and the accuracy easily interfered by the spore development stage limitations of traditional morphological identification are overcome; in view of the molecular level identification difficulty caused by the high genome homology of Tilletia indica and Tilletia controversa, the application digs the feature difference at the level of metabolomics, and constructs a specific chemical fingerprint, so that the technical bottleneck that the close relatives are difficult to accurately distinguish is effectively solved.

This invention discloses a method for detecting steroid hormones using furoyl chloride derivatization-liquid chromatography-tandem mass spectrometry. This invention utilizes furoyl chloride to derivatize steroid hormones, and the combination with liquid chromatography-tandem mass spectrometry enables highly sensitive and accurate quantification of trace amounts of steroid hormones such as estrone and estradiol in biological matrices. Compared with existing technologies, the method for detecting steroid hormones using furoyl chloride derivatization-liquid chromatography-tandem mass spectrometry provided by this invention exhibits high recovery, a wide linear range, good linearity, low detection limit, and mild reaction conditions with a simplified reaction procedure.