Phase change materials (PCM) have been widely used in Thermal Energy Storage (TES) Systems. Considering the energy efficiency and use of domestic hot water, melting temperature range phase is considered to be optimal 50–60 °C. The most commonly sodium acetate trihydrate-based material, which has advantages high latent heat low price, but its supercooling, thermal conductivity, separation affect...

A green liquid chromatographic method is considered in this work to minimize the environmental impact of waste solvents. One important principle replace or eliminate use hazardous organic Organic impurities any active pharmaceutical ingredient could arise either during process its synthesis, as degradation products developed throughout shelf-life. Remdesivir (RDS) an antiviral drug, approved by...

The title compound, [ZnCl(2)(C(21)H(15)N(3))], was obtained from the reaction of ZnCl(2)·4H(2)O with 4'-phenyl-terpyridine (L) and disodium 2,6-dipicolinate. The Zn(2+) cation is ligated by the N atoms of the tridentate L ligand and two chloride anions, forming a ZnN(3)Cl(2) polyhedron with a distorted trigonal-bipyramidal coordination geometry. In the crystal, nonclassical C-H⋯Cl hydrogen bond...

A FEw reports have appeared in the literature suggesting that long-term topical steroids may be associated with the development of posterior subcapsular cataract in the treated eye(s) (Valerio, 1963; Cronin, 1964; Streiff, 1964; Becker, 1964; Crews, 1965). Cronin (1964) described unilateral posterior subcapsular cataract in a 19-year-old male treated for one year with topical steroids and Idoxu...

OBJECTIVE To study whether antenatal or neonatal glucocorticoid therapy to reduce the incidence and severity of chronic lung disease in preterm infants is associated with long-term adverse cardiac effects and hypertension. DESIGN Retrospective matched-cohort study. SETTING Outpatient clinic of a tertiary care hospital. PARTICIPANTS One hundred ninety-three children aged 7 to 10 years who ...

The mechanism of the r,-ribulose 5-phosphate 4-epimerase has been examined. In agreement with previous observations (MCDONOUGH, M. W., AND WOOD, M. A. (1961) J. Biol. Chem. 236, 1220) no exchange of hydrogen with Hz0 is observed. Suitable double label experiments indicate that hydrogen transfer in the reaction is intramolecular. The data for kinetics of the exchange of the hydrogen at C-3 of su...

A new simple and rapid TLC-densitometric procedure for the separation and identification of betamethasone and its related substances, betamethasone-17,21-dipropionate, betamethasone-17-valerate, betamethasone-21-valerate and also betamethasone disodium phosphate was developed. One of the chromatographic systems proposed in this study, which has been satisfactory applied in separation of four pa...