To determine the gas produced when cold and dilute nitric acid reacts with copper, we can follow these steps:Step 1: Identify the Reactants The reactants in this reaction are copper (Cu) and cold, dilute nitric acid (HNO3).
It was determined that grafting of the concentrated high-molecular-weight chitosan on MNPs/GO provided efficient drug release and improved DOX loading. Studying the effects of GO and chitosan on the magnetic behavior of the Fe3O4/ GO system showed that GO decreased the contrast ef- ficiency of...
Some prior art discloses the use of concentrated carboxypolymethylene compositions for producing a matrix material having a sufficiently high viscosity, low solubility in saliva, and is sufficiently tacky to retain and hold a dental tray positioned over the patient's teeth for a period greater than...
nitric acid, phosphoric acid and the like, and organic acids such as acetic acid, trifluoroacetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, maleic acid, malonic acid, succinic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, cinnamic acid, mandelic acid, meth...
The organic layers were combined, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The obtained solid was slurried in hexane to give the compound described in the above-mentioned scheme (243 g, 96%). 1H-NMR (DMSO-D6)δ: 7.74 (1H, d, J=5.6 Hz), 8.47 (1H...
Willmar Schwabe Pharmaceuticals (Karlsruhe, Germany) successfully improved methodical procedures for the extraction and standardization of Ginkgo biloba preparation and produced highly concentrated and stable extracts from Ginkgo biloba leaves [1]. The extract of Ginkgo biloba leaves (EGb761) since then ...