High Quality Content by WIKIPEDIA articles! Xenon-135 (135Xe) is an unstable isotope of xenon with a half-life of about 9.2 hours. 135Xe is a fission product of uranium and Xe-135 is the most powerful known neutron-absorbing nuclear poison (2 million barns), with a significant effect on nuclear reactor operation. The ultimate yield of xenon-135 from fission is 6.3%, though most of this is from fission-produced tellurium-135 and iodine-135.
High Quality Content by WIKIPEDIA articles! Xenotime is a rare earth phosphate mineral, whose major component is yttrium orthophosphate (YPO4). It forms a solid solution series with chernovite-(Y) (YAsO4) and therefore may contain trace impurities of arsenic, as well as silicon dioxide and calcium. The rare earths dysprosium, erbium, terbium, and ytterbium, and metal elements like thorium and uranium (all replacing yttrium) are the expressive secondary components of xenotime. Due to uranium and thorium impurities, some xenotime specimens may be weakly to strongly radioactive. Lithiophyllite, monazite, and purpurite are sometimes grouped with xenotime in the informal "anhydrous phosphates" group. Xenotime is used chiefly as a source of...
High Quality Content by WIKIPEDIA articles! Xipamide is a sulfonamide diuretic drug marketed by Eli Lilly under the trade names Aquaphor (in Germany) and Aquaphoril (in Austria). It is used for the treatment of oedema and hypertension.
High Quality Content by WIKIPEDIA articles! Xylamidine is a drug which acts as an antagonist at the 5HT2A receptor, and to a lesser extent at the 5HT1A receptor. It does not cross the blood brain barrier which makes it useful for blocking peripheral serotonergic responses like cardiovascular and gastrointestinal effects, without producing the central effects of 5HT2A blockade such as sedation, or interfering with the central actions of 5HT2A agonists.
High Quality Content by WIKIPEDIA articles! Xylenol or dimethylphenol is an arene compound with two methyl groups and a hydroxyl group. 6 isomers exist of xylenol of which 2,6-xylenol with both methyl group in an ortho position with respect to the hydroxyl group is the most important. The name xylenol is a portmanteau of the words xylene and phenol.
High Quality Content by WIKIPEDIA articles! Xylulose is a ketopentose, a monosaccharide containing five carbon atoms, and including a ketone functional group. It has the chemical formula C5H10O5. In nature, it occurs in both the L- and D-enantiomers.
High Quality Content by WIKIPEDIA articles! The Y(4140) particle is a previously unpredicted particle observed at Fermilab and announced on 17 March 2009. This particle is extremely rare and was detected in only 20 of billions of collisions.
High Quality Content by WIKIPEDIA articles! Y-23684 is an anxiolytic drug with a novel chemical structure, which is used in scientific research. It has similar effects to benzodiazepine drugs, but is structurally distinct and so is classed as a nonbenzodiazepine anxiolytic.
High Quality Content by WIKIPEDIA articles! Yamashita`s gold, also referred to as the Yamashita treasure, is the name given to the alleged war loot stolen in Southeast Asia by Japanese forces during World War II and hidden in caves, tunnels and underground complexes in the Philippines. It is named for the Japanese general Tomoyuki Yamashita, nicknamed "The Tiger of Malaya". Though accounts that the treasure remains hidden in Philippines have lured treasure hunters from around the world for over fifty years, its existence is discounted by most experts. The rumored treasure has been the subject of a complex lawsuit that was filed in a Hawaiian state court in 1988 involving a Filipino treasure hunter, Rogelio Roxas, and the former...
High Quality Content by WIKIPEDIA articles! Ye`elimite is the naturally occurring form of calcium sulfoaluminate, Ca4(AlO2)6SO4. It gets its name from Har Ye`elim in Israel in the Hatrurim Basin west of the Dead Sea where it was first found in nature.
High Quality Content by WIKIPEDIA articles! Young Electric Sign Company (YESCO) is a privately owned manufacturer of electric signs based in Salt Lake City. The company was founded by Thomas Young in 1920 and today has divisions and branches in 10 western states, as well as in Louisiana, Mississippi and Texas. YESCO offers a comprehensive range of services for electronic signs, including design, fabrication, installation and ongoing maintenance.
High Quality Content by WIKIPEDIA articles! Yttrium aluminium garnet (YAG, Y3Al5O12) is a synthetic crystalline material of the garnet group. It is also one of three phases of the yttria-aluminium composite, the other two being yttrium aluminium monoclinic (YAM) and yttrium aluminium perovskite (YAP). YAG is commonly used as a host material in various solid-state lasers. Rare earth elements such as neodymium and erbium can be doped into YAG as active laser ions, yielding Nd:YAG and Er:YAG lasers, respectively. Cerium-doped YAG (YAG:Ce) is used as a phosphor in cathode ray tubes and white light-emitting diodes, and as a scintillator.
High Quality Content by WIKIPEDIA articles! Zaleplon (marketed under the brand names Sonata and Starnoc) is a sedative/hypnotic, mainly used for insomnia. It is a nonbenzodiazepine hypnotic from the pyrazolopyrimidine class. In terms of adverse effects zaleplon appears to offer little improvement compared to both benzodiazepines and other non-benzodiazepine Z-drugs.
High Quality Content by WIKIPEDIA articles! Zhang Zhung, Shang Shung, or Tibetan Pinyin Xang Xung, was an ancient culture and kingdom of western and northwestern Tibet, which pre-dates the culture of Tibetan Buddhism in Tibet. Zhang Zhung culture is associated with the Bon religion, which in turn, has influenced the philosophies and practices of Tibetan Buddhism. The Zhang Zhung are mentioned frequently in ancient Tibetan texts as the original rulers of central and western Tibet. Only in the last two decades have archaeologists been given access to do archaeological work in the areas once ruled by the Zhang Zhung.