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Class I (other)
Class I may refer to: * Class I antiarrhythmic * Class I electrical appliance, a device constructed according to electrical grounding specifications in the IEC 60536-2 standard * Class I bacteriocin, a type of toxin produced by some bacteria *Class I biosafety cabinet *Class I laser, a type of eye-safe laser defined in the ANSI Z136 standard *Class I rail carrier, a type of major freight railroad company in Canada * Class I railroad, a type of major freight railroad company in the United States See also *Class 1 (other) Class 1 may refer to: * Class I railroad, a term used in North American railroad size classification * Class 1 Touring Cars, an FIA classification for cars in motor racing * Class 1 World Powerboat Championship * Classes of U.S. Senators * SCORE ... * I class (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class I Antiarrhythmic
Antiarrhythmic agents, also known as cardiac dysrhythmia medications, are a group of pharmaceuticals that are used to suppress abnormally fast rhythms ( tachycardias), such as atrial fibrillation, supraventricular tachycardia and ventricular tachycardia. Many attempts have been made to classify antiarrhythmic agents. Many of the antiarrhythmic agents have multiple modes of action, which makes any classification imprecise. Vaughan Williams classification The Vaughan Williams classification was introduced in 1970 by Miles Vaughan Williams.Vaughan Williams, EM (1970) "Classification of antiarrhythmic drugs". In ''Symposium on Cardiac Arrhythmias'' (Eds. Sandoe E; Flensted-Jensen E; Olsen KH). Astra, Elsinore. Denmark (1970) Vaughan Williams was a pharmacology tutor at Hertford College, Oxford. One of his students, Bramah N. Singh, contributed to the development of the classification system. The system is therefore sometimes known as the Singh-Vaughan Williams classification. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Appliance Classes
Appliance classes (also known as protection classes) specify measures to prevent dangerous contact voltages on unenergized parts, such as the metallic casing, of an electronic device. In the electrical appliance manufacturing industry, the following appliance classes are defined in IEC 61140 and used to differentiate between the protective-earth connection requirements of devices. Class 0 These appliances have no protective-earth connection and feature only a single level of insulation between live parts and exposed metalwork. If permitted at all, Class 0 items are intended for use in dry areas only. A single fault could cause an electric shock or other dangerous occurrence, without triggering the automatic operation of any fuse or circuit breaker. Sales of such items have been prohibited in much of the world for safety reasons, for example in the UK by Section 8 of The Low Voltage Electrical Equipment (Safety) Regulations 1989and New Zealand by thElectricity Act A typical examp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEC 60536-2
The International Electrotechnical Commission (IEC; in French: ''Commission électrotechnique internationale'') is an international standards organization that prepares and publishes international standards for all electrical, electronic and related technologies – collectively known as "electrotechnology". IEC standards cover a vast range of technologies from power generation, transmission and distribution to home appliances and office equipment, semiconductors, fibre optics, batteries, solar energy, nanotechnology and marine energy as well as many others. The IEC also manages four global conformity assessment systems that certify whether equipment, system or components conform to its international standards. All electrotechnologies are covered by IEC Standards, including energy production and distribution, electronics, magnetics and electromagnetics, electroacoustics, multimedia, telecommunication and medical technology, as well as associated general disciplines such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class I Bacteriocin
Lantibiotics are a class of polycyclic peptide antibiotics that contain the characteristic thioether amino acids lanthionine or methyllanthionine, as well as the unsaturated amino acids dehydroalanine, and 2-aminoisobutyric acid. They belong to ribosomally synthesized and post-translationally modified peptides. Lanthionine is composed of two alanine residues that are crosslinked on their β-carbon atoms by a thioether (monosulfide) linkage. Lantibiotics are produced by a large number of Gram-positive bacteria such as '' Streptococcus'' and ''Streptomyces'' to attack other Gram-positive bacteria, and as such, they are considered a member of the bacteriocins. Bacteriocins are classified according to their extent of posttranslational modification. The lantibiotics are a class of more extensively modified bacteriocins, also called Class I bacteriocins. (Bacteriocins for which disulfide bonds are the only modification to the peptide are Class II bacteriocins.) Lantibiotics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biosafety Cabinet
A biosafety cabinet (BSC)—also called a biological safety cabinet or microbiological safety cabinet—is an enclosed, ventilated laboratory workspace for safely working with materials contaminated with (or potentially contaminated with) pathogens requiring a defined biosafety level. Several different types of BSC exist, differentiated by the degree of biocontainment they provide. BSCs first became commercially available in 1950. Purposes The primary purpose of a BSC is to serve as a means to protect the laboratory worker and the surrounding environment from pathogens. All exhaust air is HEPA-filtered as it exits the biosafety cabinet, removing harmful bacteria and viruses. This is in contrast to a laminar flow clean bench, which blows unfiltered exhaust air towards the user and is not safe for work with pathogenic agents. Neither are most BSCs safe for use as fume hoods. Likewise, a fume hood fails to provide the environmental protection that HEPA filtration in a BSC would p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ANSI Z136
Laser radiation safety is the safe design, use and implementation of lasers to minimize the risk of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to permanent eye injuries, the sale and usage of lasers is typically subject to government regulations. Moderate and high-power lasers are potentially hazardous because they can burn the retina, or even the skin. To control the risk of injury, various specifications, for example 21 Code of Federal Regulations (CFR) Part 1040 in the US and IEC 60825 internationally, define "classes" of laser depending on their power and wavelength. These regulations impose upon manufacturers required safety measures, such as labeling lasers with specific warnings, and wearing laser safety goggles when operating lasers. Consensus standards, such as American National Standards Institute (ANSI) Z136, provide users with control measures for laser hazards, as well as various tables help ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class I Rail Carrier
In the United States, railroad carriers are designated as Class I, II, or III, according to annual revenue criteria originally set by the Surface Transportation Board in 1992. With annual adjustments for inflation, the 2019 thresholds were US$504,803,294 for Class I carriers and US$40,384,263 for Class II carriers. (Smaller carriers were Class III by default.) There are seven Class I freight railroad companies in the United States including two Canadian carriers with subsidiary trackage in the United States: BNSF Railway, Canadian National Railway (via its subsidiary Grand Trunk Corporation), Canadian Pacific Railway (via its subsidiary Soo Line Corporation), CSX Transportation, Kansas City Southern Railway, Norfolk Southern Railway, and Union Pacific Railroad. (Mexico's Ferromex and Kansas City Southern de México would qualify as Class I, but do not operate within the United States.) In addition, the national passenger railroad in the United States, Amtrak, would qualify as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class 1 (other)
Class 1 may refer to: * Class I railroad, a term used in North American railroad size classification * Class 1 Touring Cars, an FIA classification for cars in motor racing * Class 1 World Powerboat Championship * Classes of U.S. Senators * SCORE Class 1, unlimited off-road racing buggies * The first class in terms of hiking difficulty in the Yosemite Decimal System * A contribution class in the National Insurance system in the UK * An IEC protection class in the electrical appliance manufacturing industry * A class in laser safety See also * Class I (other) * Class 01 (other) * First class (other) First class (or 1st class, Firstclass) generally implies a high level of service, importance or quality. Specific uses of the term include: Books and Comics * ''First Class'', a comic strip in ''The Dandy'' (1983-1998) * ''X-Men: First Class' ... * NSB El 1, an electric locomotive of Norway * NSB Di 1, a diesel locomotive of Norway {{disamb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
