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PX or px may refer to: In business * PX Index, index of the Prague Stock Exchange * Air Niugini (IATA airline code PX) * Part exchange, a type of contract * Post exchange, a store operated by the Army and Air Force Exchange Service on US Army posts * Praxair (stock symbol PX) * Power exchange, the entity that operates an electricity market through which electricity is traded * Phone Number Medicine * Medical prescription, (only if misprinted as the symbol "℞" can be mistaken for "Px") * Medical procedure, a Prognosis or Physical Exam * Patient experience Chemistry * p-Xylene (Paraxylene), an aromatic hydrocarbon, based on benzene with two methyl substituents, of which PX is the industrial symbol. * Peroxidase * Pyroxenes, commonly abbreviated to Px, are a group of important rock-forming inosilicate minerals * Protein crystallography, the study of protein crystals to determine the molecular structure of proteins Other uses * Pixel, in digital displays * PX clade, a taxonomic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chi Rho
The Chi Rho (☧, English pronunciation ; also known as ''chrismon'') is one of the earliest forms of Christogram, formed by superimposing the first two (capital) letters—chi and rho (ΧΡ)—of the Greek word ( Christos) in such a way that the vertical stroke of the rho intersects the center of the chi. The Chi-Rho symbol was used by the Roman Emperor Constantine I (r. 306–337 AD) as part of a military standard ( vexillum). Constantine's standard was known as the Labarum. Early symbols similar to the Chi Rho were the Staurogram () and the IX monogram (). In pre-Christian times, the Chi-Rho symbol was also used to mark a particularly valuable or relevant passage in the margin of a page, abbreviating ''chrēston'' (good). Some coins of Ptolemy III Euergetes (r. 246–222 BC) were marked with a Chi-Rho. Although formed of Greek characters, the device (or its separate parts) is frequently found serving as an abbreviation in Latin text, with endings added appropriate t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phaeophyceae
Brown algae (singular: alga), comprising the class Phaeophyceae, are a large group of multicellular algae, including many seaweeds located in colder waters within the Northern Hemisphere. Brown algae are the major seaweeds of the temperate and polar regions. They are dominant on rocky shores throughout cooler areas of the world. Most brown algae live in marine environments, where they play an important role both as food and as a potential habitat. For instance, '' Macrocystis'', a kelp of the order Laminariales, may reach in length and forms prominent underwater kelp forests. Kelp forests like these contain a high level of biodiversity. Another example is ''Sargassum'', which creates unique floating mats of seaweed in the tropical waters of the Sargasso Sea that serve as the habitats for many species. Many brown algae, such as members of the order Fucales, commonly grow along rocky seashores. Some members of the class, such as kelps, are used by humans as food. Between 1,500 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
P-Xylene
''p''-Xylene ( ''para''-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as xylenes. The ''p-'' stands for ''para-'', indicating that the two methyl groups in ''p''-xylene occupy the diametrically opposite substituent positions 1 and 4. It is in the positions of the two methyl groups, their arene substitution pattern, that it differs from the other isomers, ''o''-xylene and ''m''-xylene. All have the same chemical formula C6H4(CH3)2. All xylene isomers are colorless and highly flammable. The odor threshold of ''p''-xylene is 0.62 parts per million (ppm). Production The production of ''p''-xylene is industrially significant, with annual demand estimated at 37 million tons in 2014, and still on the increase. ''p''-Xylene is produced by catalytic reforming of petroleum naphtha as part of the BTX aromatics (benzene, toluene and the xylene isomers) extracted from the catalytic reformate. The ''p''-xylene is then separated out ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stramenopiles
Stramenopile is a clade of organisms distinguished by the presence of stiff tripartite external hairs. In most species, the hairs are attached to flagella, in some they are attached to other areas of the cellular surface, and in some they have been secondarily lost (in which case relatedness to stramenopile ancestors is evident from other shared cytological features or from genetic similarity). Stramenopiles represent one of the three major clades in the SAR supergroup, along with Alveolata and Rhizaria. Members of the clade are referred to as 'stramenopiles'. Stramenopiles are eukaryotes; since they are neither fungi, animals, nor plants, they are classified as protists. Most stramenopiles are single-celled, but some are multicellular algae including some brown algae. The group includes a variety of algal protists, heterotrophic flagellates, opalines and closely related proteromonad flagellates (all endobionts in other organisms); the actinophryid heliozoa, and oomycetes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroxenes
The pyroxenes (commonly abbreviated to ''Px'') are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks. Pyroxenes have the general formula , where X represents calcium (Ca), sodium (Na), iron (Fe II) or magnesium (Mg) and more rarely zinc, manganese or lithium, and Y represents ions of smaller size, such as chromium (Cr), aluminium (Al), magnesium (Mg), cobalt (Co), manganese (Mn), scandium (Sc), titanium (Ti), vanadium (V) or even iron (Fe II) or (Fe III). Although aluminium substitutes extensively for silicon in silicates such as feldspars and amphiboles, the substitution occurs only to a limited extent in most pyroxenes. They share a common structure consisting of single chains of silica tetrahedra. Pyroxenes that crystallize in the monoclinic system are known as clinopyroxenes and those that crystallize in the orthorhombic system are known as orthopyroxenes. The name ''pyroxene'' is derived from the Ancient Greek words for 'fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PX Index
The PX Index (until March 2006 the PX 50) is a capitalization-weighted index of major stocks that trade on the Prague Stock Exchange. Selected as the starting exchange day (a benchmark date) for the Index PX 50 was 5 April 1994 and its opening value was fixed at 1,000 points. At this time the index included 50 companies traded on the Prague Stock Exchange, accordingly named PX 50. In 2014 Prague Stock Exchange introduced total return index PX-TR, that share same base as PX Index, but unlike PX index take into account dividends. History PX-50 After an initial boom encouraged by voucher privatization (the top was in February 1994 retroactively calculated on 1245 points) the index started to decline fast, and ended the year 1994 with 557 points. In 1995 the decline continued (influenced by the Mexican crisis, that discouraged foreign investors from emerging markets) and the index reached its first bottom on 29 June with 387 points. Then the index increased slowly and ended the y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pixel
In digital imaging, a pixel (abbreviated px), pel, or picture element is the smallest addressable element in a raster image, or the smallest point in an all points addressable display device. In most digital display devices, pixels are the smallest element that can be manipulated through software. Each pixel is a sample of an original image; more samples typically provide more accurate representations of the original. The intensity of each pixel is variable. In color imaging systems, a color is typically represented by three or four component intensities such as red, green, and blue, or cyan, magenta, yellow, and black. In some contexts (such as descriptions of camera sensors), ''pixel'' refers to a single scalar element of a multi-component representation (called a ''photosite'' in the camera sensor context, although '' sensel'' is sometimes used), while in yet other contexts (like MRI) it may refer to a set of component intensities for a spatial position. Etymology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
XP (other)
XP may refer to: Medicine * Xanthelasma palpebrarum, a cholesterol deposit in the eyelid * Xeroderma pigmentosum, a genetic disorder Computing * Windows XP, an operating system * Microsoft Office XP, a version of the software suite * Athlon XP, a series of AMD microprocessors * Extreme programming, a software development methodology * XP, a complexity class in parameterized complexity Technology * Ilford XP, a chromogenic black and white film made by Ilford Photo Gaming * Experience point, a unit for measuring a character's progress in role-playing games Transport * Boeing XP-7, a prototype United States biplane fighter of the 1920s * Experimental pursuit, a USAAC aircraft designation, used by e.g. the Lockheed XP-38 Lightning * Avelo Airlines (IATA code) Other uses * Chi Rho, a Christian symbol * Experience point, a unit of measurement in role-playing games * XP, an emoticon An emoticon (, , rarely , ), short for "emotion icon", also known simply as an emote ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PXS (other)
PXS may refer to: *The PXS suit, a NASA prototype space suit *The ticker symbol for Provexis on the London Stock Exchange *The ticker symbol for an exchange-traded fund on the Toronto Stock Exchange *PXS, an abbreviation variant for PES or Pseudoexfoliation syndrome See also * * * PX (other) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedro Ximénez
Pedro Ximénez (also known as PX and many other variations) is the name of a white Spanish wine grape variety grown in several Spanish wine regions but most notably in the '' denominación de origen'' (DO) of Montilla-Moriles. Here it is used to produce a varietal wine, an intensely sweet, dark, dessert sherry. It is made by drying the grapes under the hot sun, concentrating the sweetness (similar to straw wine production), which are then used to create a thick, black liquid with a strong taste of raisins and molasses that is fortified and aged in solera.J. Robinson, J. Harding and J. Vouillamoz ''Wine Grapes - A complete guide to 1,368 vine varieties, including their origins and flavours'' pgs 776-777 Allen Lane 2012 Historically Pedro Ximénez is grown in Australia to make fortified wines and sherry type wines known by the Australian term - Apera. It is often used for blending and to make botrytised dessert wines and still lends itself in the Swan Valley to the making of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation PX
Operation PX, also known as Operation Cherry Blossoms at Night, was a planned Japanese military attack on civilians in the United States using biological weapons, devised during World War II. The proposal was for Imperial Japanese Navy submarines to launch seaplanes that would deliver weaponized bubonic plague, developed by Unit 731 of the Imperial Japanese Army, to the West Coast of the United States. The operation was abandoned shortly after its planning was finalized in March 1945 due to the strong opposition of General Yoshijirō Umezu, Chief of the Army General Staff. Overview Operation PX was proposed in December 1944 by the Japanese Naval General Staff, led by Vice-Admiral Jisaburō Ozawa. The name for the operation came from the Japanese use of the code name PX for Pestis bacillus-infected fleas. In planning the operation, the navy partnered with Lieutenant-General Shirō Ishii of Unit 731, who had extensive experience on weaponizing pathogenic bacteria and human vul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xanthophyceae
Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. Most live in fresh water, but some are found in marine and soil habitats. They vary from single-celled flagellates to simple colonial and filamentous forms. Xanthophyte chloroplasts contain the photosynthetic pigments chlorophyll ''a'', chlorophyll ''c'', β-carotene, and the carotenoid diadinoxanthin. Unlike other heterokonts, their chloroplasts do not contain fucoxanthin, which accounts for their lighter colour. Their storage polysaccharide is chrysolaminarin. Xanthophyte cell walls are produced of cellulose and hemicellulose. They appear to be the closest relatives of the brown algae. Classifications The species now placed in the Xanthophyceae were formerly included in the Chlorophyceae. In 1899, Lüther created the group Heterokontae for green algae with unequal flagella. Pascher (1914) included the Heterokontae in the Chrysophyta. In 1930, Allorge renamed the group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
