High Quality Content by WIKIPEDIA articles! Propene, also known as propylene or methylethylene, is an unsaturated organic compound having the chemical formula C3H6. It has one double bond, and is the second simplest member of the alkene class of hydrocarbons, and it is also second in natural abundance.
High Quality Content by WIKIPEDIA articles! Propiomazine (Largon, Propavan, Indorm, Serentin, Indorm, Dorevane, Dorevan) is an antihistamine blocking H1 receptors. It is used to treat insomnia, and to produce sleepiness or drowsiness and to relieve anxiety before or during surgery or other procedures and in combination with analgetics also during labor. Propiomazine is a phenothiazine, but is not used as a neuroleptic because it does not block dopamine receptors well.
High Quality Content by WIKIPEDIA articles! Propofol (INN, marketed as Diprivan by AstraZeneca) is a short-acting, intravenously administered hypnotic agent. Its uses include the induction and maintenance of general anesthesia, sedation for mechanically ventilated adults, and procedural sedation. Propofol is also commonly used in veterinary medicine. Propofol is approved for use in more than 50 countries, and generic versions are available.
High Quality Content by WIKIPEDIA articles! Propranolol (INN) is a sympatholytic non-selective beta blocker. Sympatholytics are used to treat hypertension, anxiety and panic. It was the first successful beta blocker developed. Propranolol is available in generic form as propranolol hydrochloride, as well as an AstraZeneca and Wyeth product under the brand names Inderal, Inderal LA, Avlocardyl (also available in prolonged absorption form named "Avlocardyl Retard"), Deralin, Dociton, Inderalici, InnoPran XL, Sumial, Anaprilinum (depending on marketplace and release rate), Bedranol SR (Sandoz).
High Quality Content by WIKIPEDIA articles! Propylketobemidone is an opioid analgesic that is an analogue of ketobemidone. It was developed in the 1950s during research into analogues of pethidine and was assessed by the United Nations Office on Drugs and Crime but was not included on the list of drugs under international control, probably because it was not used in medicine or widely available.
High Quality Content by WIKIPEDIA articles! The proton is a subatomic particle with the symbol p or p+ and a positive electric charge of 1 elementary charge. One or more protons are present in the nucleus of each atom, along with neutrons. The number of protons in each atom is its atomic number.
High Quality Content by WIKIPEDIA articles! Pseudomalachite is a phosphate of copper with hydroxyl, named from the Greek for “false” and “malachite”, because of its similarity in appearance to the carbonate mineral malachite, Cu2(CO3)(OH)2. Both are green coloured secondary minerals found in oxidised zones of copper deposits, often associated with each other. Pseudomalachite is polymorphous with reichenbachite and ludjibaite. It was discovered in 1813. Prior to 1950 it was thought that dihydrite, lunnite, ehlite, tagilite and prasin were separate mineral species, but Berry analysed specimens labelled with these names from several museums, and found that they were in fact pseudomalachite. The old names are no longer recognised by...
High Quality Content by WIKIPEDIA articles! PSR B1937+21 is a pulsar located in the constellation Vulpecula a few degrees in the sky away from the first discovered pulsar, PSR B1919+21. The name PSR B1937+21 is derived from the word "pulsar" and the declination and right ascension at which it is located, with the "B" indicating that the coordinates are for the 1950.0 epoch. PSR B1937+21 was discovered in 1982 by Don Backer, Shri Kulkarni, Carl Heiles, Michael Davis, and Miller Goss. It is the first discovered millisecond pulsar, with a rotational period of 1.557708 milliseconds, meaning it completes almost 642 rotations per second. This period was far shorter than astronomers considered pulsars capable of reaching, and led to the...
High Quality Content by WIKIPEDIA articles! Pulegone is a naturally occurring organic compound obtained from the essential oils of a variety of plants such as Nepeta cataria (catnip), Mentha piperita, and pennyroyal. It is classified as a monoterpene.
High Quality Content by WIKIPEDIA articles! Pyrazinamide is a drug used to treat tuberculosis. The drug is largely bacteriostatic, but can be bacteriocidal on actively replicating tuberculosis bacteria.
High Quality Content by WIKIPEDIA articles! Pyrene is a polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromatic system. The chemical formula is C16H10. This colourless solid is the smallest peri-fused PAH (one where the rings are fused through more than one face). Pyrene forms during incomplete combustion of organic compounds.
High Quality Content by WIKIPEDIA articles! Pyrex (trademarked as PYREX) is a brand which was introduced by Corning Incorporated in 1915 for a line of clear, low-thermal-expansion borosilicate glass used for laboratory glassware and kitchenware.
High Quality Content by WIKIPEDIA articles! Pyridoxamine is a vitamer in the vitamin B6 family, which includes pyridoxal and pyridoxine. Pyridoxamine is converted to the biologically active form of vitamin B6, pyridoxal 5-phosphate, via the vitamin B6 salvage pathway. Vitamin B6 acts as an enzyme cofactor in a variety of metabolic processes. In food, pyridoxamine is commonly found as a 5’-phosphate derivative, which is hydrolyzed by intestinal phosphatases to pyridoxamine and absorbed in the jejunum. Absorbed pyridoxamine is converted to pyridoxamine 5’-phosphate by pyridoxal kinase, which is further converted to the active pyridoxal 5-phosphate by pyridoxamine-phosphate transaminase or pyridoxine 5’-phosphate oxidase.
High Quality Content by WIKIPEDIA articles! Pyrovalerone (Centroton, Thymergix, O-2371) is a psychoactive drug with stimulant effects via acting as a norepinephrine-dopamine reuptake inhibitor (NDRI), and is used for the clinical treatment of chronic fatigue or lethargy and as an anorectic or appetite suppressant for weight loss purposes. It was developed in the late 1960s and has since been used in France and several other European countries. Though pyrovalerone is still occasionally prescribed, it is used infrequently due to problems with abuse and dependence. Pyrovalerone is a Schedule V controlled substance in the United States (U.S.), and is the only stimulant in that category. In Britain, it is in the Class C category and In...
High Quality Content by WIKIPEDIA articles! Pyrrolysine (abbreviated as Pyl or O) is a naturally occurring, genetically coded amino acid used by some methanogenic archaea and one known bacterium in enzymes that are part of their methane-producing metabolism. It is similar to lysine, but with an added pyrroline ring linked to the end of the lysine side chain. Produced by a specific tRNA and aminoacyl tRNA synthetase, it forms part of an unusual genetic code in these organisms, and is considered the 22nd proteinogenic amino acid.
High Quality Content by WIKIPEDIA articles! Qatalum is 50-50 joint venture aluminium smelter project between Qatar Petroleum and Norsk Hydro. It will be the largest aluminium plant ever launched. It is located in Mesaieed, Qatar. It will have a capacity in the first phase of 585,000 tonnes of primary aluminium, all to be shipped as value added aluminium casthouse products. A 1350 MW natural gas power plant will also be built to ensure a stable supply of electricity.
High Quality Content by WIKIPEDIA articles! QH-II-66 (QH-ii-066) is a sedative drug which is a benzodiazepine derivative. It produces some of the same effects as other benzodiazepines, but is much more selective than most other drugs of this class and so produces somewhat less sedation and ataxia than other related drugs such as diazepam and triazolam, although it still retains anticonvulsant effects.