PBT Substances

	PBT Substances PBT may refer to: Science and technology * Persistent, bioaccumulative and toxic substances, a class of compounds that have high resistance to degradation * Polybutylene terephthalate, plastic used as an electrical insulator * Provider Backbone Transport, IEEE 802.1 networking technology * Preliminary breath test, with a hand-held breathalyzer * Property-based testing, a software testing framework; for example see QuickCheck Other uses * Permian Basin Royalty Trust (NYSE symbol) * Profit before tax, a variation of EBIT * Progressing Ballet Technique, a form of cross training used for ballet that is uses ballet specific exercises similar to Pilates * Pittsburgh Ballet Theatre The Pittsburgh Ballet Theatre (PBT) is an American professional ballet company based in the Strip District of Pittsburgh, Pennsylvania (USA). History 1969 - Founding The Pittsburgh Ballet Theatre was founded in 1969 by a Yugoslavian choreog ... , a ballet company in Pennsylvania, USA {{disambi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Persistent, Bioaccumulative And Toxic Substances Persistent, bioaccumulative and toxic substances (PBTs) are a class of compounds that have high resistance to degradation from abiotic and biotic factors, high mobility in the environment and high toxicity. Because of these factors PBTs have been observed to have a high order of bioaccumulation and biomagnification, very long retention times in various media, and widespread distribution across the globe. Most PBTs in the environment are either created through industry or are unintentional byproducts.Blais J. 2005. Biogeochemistry of persistent bioaccumulative toxicants: processes affecting the transport of contaminants to remote areas. Canadian Journal of Fisheries and Aquatic Sciences 62: 236-243. History Persistent organic pollutants (POPs) were the focal point of the Stockholm Convention 2001 due to their persistence, ability to biomagnify and the threat posed to both human health and the environment. The goal of the Stockholm Convention was to determine the classification of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Polybutylene Terephthalate Polybutylene terephthalate (PBT) is a thermoplastic engineering polymer that is used as an insulator in the electrical and electronics industries. It is a thermoplastic (semi-)crystalline polymer, and a type of polyester. PBT resists solvents, shrinks very little during forming, is mechanically strong, is heat-resistant up to (or with glass-fibre reinforcement), and can be treated with flame retardants to make it noncombustible. It was developed by Britain's Imperial Chemical Industries (ICI). PBT is closely related to other thermoplastic polyesters. Compared to PET (polyethylene terephthalate), PBT has slightly lower strength and rigidity, slightly better impact resistance, and a slightly lower glass transition temperature. PBT and PET are sensitive to hot water above (140 °F). PBT and PET need UV protection if used outdoors, and most grades of these polyesters are flammable, although additives can be used to improve both UV and flammability properties. Applications P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Provider Backbone Transport Provider Backbone Bridge Traffic Engineering (PBB-TE) is an approved telecommunications networking standard, IEEE 802.1Qay-2009. PBB-TE adapts Ethernet technology to carrier class transport networks. It is based on the layered VLAN tags and MAC-in-MAC encapsulation defined in IEEE 802.1ah (Provider Backbone Bridges (PBB)), but it differs from PBB in eliminating flooding, dynamically created forwarding tables, and spanning tree protocols. Compared to PBB and its predecessors, PBB-TE behaves more predictably and its behavior can be more easily controlled by the network operator, at the expense of requiring up-front connection configuration at each bridge along a forwarding path. PBB-TE Operations, Administration, and Management (OAM) is usually based on IEEE 802.1ag. It was initially based on Nortel's Provider Backbone Transport (PBT). PBB-TE's connection-oriented features and behaviors, as well as its OAM approach, are inspired by SDH/SONET. PBB-TE can also provide path protection ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Preliminary Breath Test A breathalyzer or breathalyser (a portmanteau of ''breath'' and ''analyzer/analyser'') is a device for estimating blood alcohol content (BAC), or to detect viruses or diseases from a breath sample. The name is a genericized trademark of the Breathalyzer brand name of instruments developed by inventor Robert Frank Borkenstein in the 1950s. Origins A 1927 paper produced by Emil Bogen, who collected air in a football bladder and then tested this air for traces of alcohol, discovered that the alcohol content of 2 litres of expired air was a little greater than that of 1 cc of urine. However, research into the possibilities of using breath to test for alcohol in a person's body dates as far back as 1874, when Francis E. Anstie made the observation that small amounts of alcohol were excreted in breath. Also, in 1927 a Chicago chemist, William Duncan McNally, invented a breathalyzer in which the breath moving through chemicals in water would change color. One use for his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	QuickCheck QuickCheck is a software library, specifically a combinator library, originally written in the programming language Haskell, designed to assist in software testing by generating test cases for test suites – an approach known as property testing. Software It is compatible with the compiler, Glasgow Haskell Compiler (GHC) and the interpreter, Haskell User's Gofer System ( Hugs). It is free and open-source software released under a BSD-style license. In QuickCheck, assertions are written about logical properties that a function should fulfill. Then QuickCheck attempts to generate a test case that falsifies such assertions. Once such a test case is found, QuickCheck tries to reduce it to a minimal failing subset by removing or simplifying input data that are unneeded to make the test fail. The project began in 1999. Besides being used to test regular programs, QuickCheck is also useful for building up a functional specification, for documenting what functions should be doing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Permian Basin Royalty Trust The Permian Basin Royalty Trust () is a United States oil and natural gas royalty trust based in Dallas, Texas. With a market capitalization of US $790,000,000, and an average daily trading volume of about 186,000 shares at the end of 2007, it was one of the largest royalty trusts in the United States. Its source of revenue is oil and gas pumped from the geologic formation for which it is named, the Permian Basin in west Texas, as well as a few locations in other parts of the state. Most of the Trust's properties are on the Waddell Ranch in Crane County, Texas, where it owns a 75% net overriding royalty interest in the fee mineral interests (in this case, oil and natural gas). Other properties of the trust are in 32 other Texas counties, most of which are in the western portion of the state, on the High Plains; the trust owns a 95% net overriding royalty interest in all of its properties outside of the Waddell Ranch. The principal productive zones for oil on the Waddell Ranch a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Profit Before Tax In accounting and finance, earnings before interest and taxes (EBIT) is a measure of a firm's profit that includes all incomes and expenses (operating and non-operating) except interest expenses and income tax expenses. Operating income and operating profit are sometimes used as a synonym for EBIT when a firm does not have non-operating income and non-operating expenses. Formula EBIT = (net income) + interest + taxes = EBITDA – (depreciation and amortization expenses) operating income = ( gross income) – OPEX = EBIT – (non-operating profit) + (non-operating expenses) where EBITDA = earnings before interest, taxes, depreciation, and amortization OPEX = operating expense Overview A professional investor contemplating a change to the capital structure of a firm (e.g., through a leveraged buyout) first evaluates a firm's fundamental earnings potential (reflected by earnings before interest, taxes, depreciation and amortization (EBITDA) and EBIT), and then determines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Progressing Ballet Technique Progressing Ballet Technique (PBT) is a program developed by Marie Walton-Mahon to help students advance in all dance forms by training muscle memory. PBT focuses on core stability In kinesiology, core stability refers to a person's ability to stabilize their Core (anatomy), core (all parts of the Human body, body which are not Limb (anatomy), limbs). Stability, in this context, should be considered as an ability to Motor co ..., weight placement and alignment. PBT is practiced internationally. References Ballet technique {{ballet-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]