Preparation of 2-Chlorobenzonitrile, and benzonitrile are reported here from the corresponding 2-Chlorobenzaldehyde and benzaldehyde by the reaction of ammonium hydroxide/VPO titania, VPO bulk (...

Background: Cryopreservation of ovarian tissue is an important option in order to preserve the fertility of cancer patients undergoing chemotherapy and radiotherapy. There are many reports on adding some materials such as calcium, ascorbate and antioxidants to freezing medium. Vanadium is one of the minerals, which is very important as a trace element for normal cell function as well as develop...

A portable sensor for the analysis of phosphate in aqueous samples has been developed. The sensor incorporates microfluidic technology, colorimetric detection, and wireless communications into a compact and rugged portable device. The detection method used is the molybdenum yellow method, in which a phosphate-containing sample is mixed with a reagent containing ammonium metavanadate and ammoniu...

High purity ammonium metavanadate (NH4VO3) is the most vital chemical to produce V2O5, VO2, VN alloy, VFe alloy and VOSO4, which have some prospective applications for high strength steel, smart window, infrared detector imaging, large scale energy storage system. NH4VO3 usually produced by spontaneous crystallization from aqueous solution due its sharp dependence of solubility on temperature. ...

본 연구에서는 소듐바나데이트 수용액에 염화암모늄을 첨가하여 암모늄메타바나데이트를 침전시킬 때, 암모늄메타바나데이트의 용해도와 암모늄이온의 분해율이 침전반응에 미치는 영향을 알아보았다. 침전온도와 수용액 pH가 증가함에 따라 암모늄 이온의 증가하였으며 45 ℃에서 pH 9.3일 때 분해율은 81% 이상으로 8일 때와 비교하였을 약 4배 정도 증가하였다. 그러므로 침전 반응에 큰 두 인자를 고려하여 침전반응을 수행한 결과, 침전온도가 침전속도가 증가하였으나 35 ℃ 이상에서는 침전온도의 영향이 크지 않았다. 침전반응 속도론적 고찰을 통하여 얻은 침전반응의 활성화 에너지는 42.3 kJ/mol이었다. 이와 같은 연구를 용해도를 고려하였을 침전온도는 낮을수록 바나듐 회수율에 유리하였다. 또한 분해를 수용액의 ...

Mouse erythroleukemia (Mel) cells have a cell cycle-dependent high sensitivity to chemical and physical mutagens. This report shows that a 5 h exposure to 0.1 or 0.01 microg/ml metavanadate during the initial period of erythroid differentiation induction was sufficient to permanently damage the ability of treated Mel cells and their progeny to undergo erythroid differentiation, without affectin...