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Micro

Humayun khan
Humayun khan

The micro- prefix denotes a factor of one millionth. The symbol for the prefix is the Greek letter mu (亮). When the mu character is unavailable, standards allow substituting it with the letter u. The micro symbol is encoded separately from the Greek letter mu in Unicode for compatibility reasons, though most fonts display them identically. In medical prescriptions, "mcg" is sometimes used instead of "亮g" to avoid misreading.

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Micro- Micro- (Greek letter 亮 or legacy micro symbol 袖) is a unit prefix in the metric system denoting a factor of 106 (one millionth).[1] Confirmed in 1960, the prefix comes from theGreek 亮旅虜 (mikr坦s), meaning "small". The symbol for the prefix comes from theGreek letter亮 (mu). It is the onlySI prefix which uses a character not from the Latin alphabet. "mc" is commonly used as a prefix when the character "亮" is not available; for example, "mcg" commonly denotes a microgram. Also the letter u instead of 亮 is allowed by one of the ISO documents.[2] Examples: Typical bacteria are 1 to 10 micrometres in diameter. Eukaryotic cellsare typically 10 to 100 micrometres in diameter.[3] Prefix Base 1000 Base 10 Decimal English word Adoption[nb 1] Name Symbol Short scale Long scale yotta Y 10008 1024 1 000 000 000 000 000 000 000 000 septillion quadrillion 1991 zetta Z 10007 1021 1 000 000 000 000 000 000 000 sextillion trilliard 1991 exa E 10006 1018 1 000 000 000 000 000 000 quintillion trillion 1975 peta P 10005 1015 1 000 000 000 000 000 quadrillion billiard 1975 tera T 10004 1012 1 000 000 000 000 trillion billion 1960 giga G 10003 109 1 000 000 000 billion milliard 1960 mega M 10002 106 1 000 000 million 1873 kilo k 10001 103 1 000 thousand 1795 hecto h 10002/3 102 100 hundred 1795 deca da 10001/3 101 10 ten 1795 10000 100 1 one deci d 10001/3 101 0.1 tenth 1795 centi c 10002/3 102 0.01 hundredth 1795 milli m 10001 103 0.001 thousandth 1795 micro 亮 10002 106 0.000 001 millionth 1873 nano n 10003 109 0.000 000 001 billionth milliardth 1960 pico p 10004 1012 0.000 000 000 001 trillionth billionth 1960 femto f 10005 1015 0.000 000 000 000 001 quadrillionth billiardth (Proposed) 1964 atto a 10006 1018 0.000 000 000 000 000 001 quintillionth trillionth 1964 zepto z 10007 1021 0.000 000 000 000 000 000 001 sextillionth trilliardth 1991 yocto y 10008 1024 0.000 000 000 000 000 000 000 001 septillionth quadrillionth 1991 1. Prefixes adopted before 1960 already existed before SI. 1873 was the introduction of theCGS system. Comparison between the micro symbol and the Greek letter mu in Linux Libertine SI prefixes Contents
Symbol encoding in character sets Other abbreviating conventions See also References The official symbol for the SI prefix micro- is a Greek lowercase mu (亮).[4] For reasons stemming from its design, there are two different characters in Unicode, which appear slightly different in some fonts, although most fonts use the same glyph. The micro sign (袖) is encoded in the "Latin-1 Supplement" range identical to ISO/IEC 8859-1 (since 1987), at U+00B5 ( Alt + 0181 ),[5] residing at this code point also in DEC MCS (since 1983) and ECMA-94 (since 1985). The Greek letter (亮) is encoded in the Greek range at U+03BC ( Alt + 956 ). According toThe Unicode Consortium, the Greek letter character is preferred,[6] but implementations must recognize the micro sign as well. In circumstances in which only the Latin alphabet is available, ISO 2955 (1974,[7] 1983[8]), DIN 66030 (Vornorm 1973;[9] 1980,[10][11] 2002[12]) and BS 6430 (1983) allow the prefix 亮 to be substituted by the letter u (or even U, if lowercase letters are not available), as, for example, in um for 亮m, or uF for 亮F. Similar, capacitor values according to the RKM code defined in IEC 60062 (IEC 62) (since 1952),EN 60062, DIN 40825(1973), BS 1852 (1974), IS 8186 (1976) etc. can be written as 4u7 (or 4U7) instead of 4亮7 if the Greek letter亮 is not available. In some health care institutions, house rules deprecate the standard symbol for microgram, "亮g", in prescribing or chart recording, because of the risk of misdose via the misreading of poor handwriting.[13] The two alternatives are to abbreviate as "mcg"[13] or to write out "microgram" in full (see also List of abbreviations used in medical prescriptions). But this deprecation, focused on bedside misdose avoidance in contexts where handwriting is often present, does not extend to all health-care contexts and institutions (for example, some clinical laboratories'reports adhere to it, whereas others do not[13]), and in physical sciences academia, "亮g" remains the sole official abbreviation. In medical data exchange according to theHealth Level 7(HL7) standard, the 亮 can be replaced by u as well.[14] Microgram Micrometre Microsecond Square micrometre List of commonly used taxonomic affixes 1. International Bureau of Weights and Measures (2006), The International System of Units (SI)(http://www.bipm.org/ut ils/common/pdf/si_brochure_8_en.pdf)(PDF) (8th ed.), ISBN 92-822-2213-6, archived (https://web.archive.org/web/2 0170814094625/http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf)(PDF) from the original on 2017-08-14 2. ISO 2955 (http://isotc.iso.org/livelink/livelink/4289384/ISO_2955-1983E_repr_of_SI_units_with_limited_char_sets.pd f?func=doc.Fetch&nodeid=4289384), table 2. 3. Biology by Campbell & Reece, tenth edition. Ch. 6 "A Tour of the Cell". p. 98. 4. Prefixes of the International System of Units(http://www.bipm.org/en/measurement-units/prefixes.html), International Bureau of Weights and Measures(page visited on 9 May 2016). 5. (Unicode 1.0, 1991) Symbol encoding in character sets Other abbreviating conventions See also References
Retrieved from "https://en.wikipedia.org/w/index.php?title=Micro-&oldid=894364596" This page was last edited on 27 April 2019, at 12:04(UTC). Text is available under theCreative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to theTerms of Useand Privacy Policy. Wikipedia速 is a registered trademark of theWikimedia Foundation, Inc., a non-profit organization. 6. Unicode Technical Report #25(https://www.unicode.org/reports/tr25) 7. ISO 2955-1974: lnformation processing - Representations of SI and other units for use in systems with limited character sets(1st ed.). 1974. 8. "Table 2". ISO 2955-1983: lnformation processing - Representations of SI and other units for use in systems with limited character sets(http://isotc.iso.org/livelink/livelink/4289384/ISO_2955-1983E_repr_of_SI_units_with_limited_c har_sets.pdf?func=doc.Fetch&nodeid=4289384)(PDF) (2nd ed.). 1983-05-15. Retrieved 2016-12-14. [1] (http://ww w.bgu.ac.il/~averbukh/ISO_2955-1983E.pdf) 9. Vornorm DIN 66030[Preliminary standard DIN 66030] (in German). January 1973. 10. DIN 66030: Darstellungen von Einheitennamen in Systemen mit beschr辰nktem Schriftzeichenvorrat(in German) (1st ed.). 1980. 11. "Neue Normen f端r die Informationsverarbeitung"(http://www.computerwoche.de/a/neue-normen-fuer-die-information sverarbeitung,1184901). Computerwoche(in German). 1981-01-09.Archived (https://web.archive.org/web/20161214 025700/http://www.computerwoche.de/a/neue-normen-fuer-die-informationsverarbeitung%2C1184901)from the original on 2016-12-14. Retrieved 2016-12-14. 12. DIN 66030:2002-05 - Informationstechnik - Darstellung von Einheitennamen in Systemen mit beschr辰nktem Schriftzeichenvorrat(https://www.beuth.de/de/norm/din-66030/50570368) [Information technology - Representation of SI and other units in systems with limited character sets] (in German).Beuth Verlag. May 2002. Retrieved 2016-12-14. 13. Burtis, Carl A.; Ashwood, Edward R.; Bruns, David E. (2012),Tietz Textbook of Clinical Chemistry and Molecular Diagnostics(https://books.google.com/books?id=BBLRUI4aHhkC&pg=PT2241#v=onepage&q&f=false)(5th ed.). 14. "Commonly Used UCUM Codes for Healthcare Units"(http://download.hl7.de/documents/ucum/ucumdata.html). HL7 Deutschland e.V. Retrieved 2015-11-21.

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Micro

  • 1. Micro- Micro- (Greek letter 亮 or legacy micro symbol 袖) is a unit prefix in the metric system denoting a factor of 106 (one millionth).[1] Confirmed in 1960, the prefix comes from theGreek 亮旅虜 (mikr坦s), meaning "small". The symbol for the prefix comes from theGreek letter亮 (mu). It is the onlySI prefix which uses a character not from the Latin alphabet. "mc" is commonly used as a prefix when the character "亮" is not available; for example, "mcg" commonly denotes a microgram. Also the letter u instead of 亮 is allowed by one of the ISO documents.[2] Examples: Typical bacteria are 1 to 10 micrometres in diameter. Eukaryotic cellsare typically 10 to 100 micrometres in diameter.[3] Prefix Base 1000 Base 10 Decimal English word Adoption[nb 1] Name Symbol Short scale Long scale yotta Y 10008 1024 1 000 000 000 000 000 000 000 000 septillion quadrillion 1991 zetta Z 10007 1021 1 000 000 000 000 000 000 000 sextillion trilliard 1991 exa E 10006 1018 1 000 000 000 000 000 000 quintillion trillion 1975 peta P 10005 1015 1 000 000 000 000 000 quadrillion billiard 1975 tera T 10004 1012 1 000 000 000 000 trillion billion 1960 giga G 10003 109 1 000 000 000 billion milliard 1960 mega M 10002 106 1 000 000 million 1873 kilo k 10001 103 1 000 thousand 1795 hecto h 10002/3 102 100 hundred 1795 deca da 10001/3 101 10 ten 1795 10000 100 1 one deci d 10001/3 101 0.1 tenth 1795 centi c 10002/3 102 0.01 hundredth 1795 milli m 10001 103 0.001 thousandth 1795 micro 亮 10002 106 0.000 001 millionth 1873 nano n 10003 109 0.000 000 001 billionth milliardth 1960 pico p 10004 1012 0.000 000 000 001 trillionth billionth 1960 femto f 10005 1015 0.000 000 000 000 001 quadrillionth billiardth (Proposed) 1964 atto a 10006 1018 0.000 000 000 000 000 001 quintillionth trillionth 1964 zepto z 10007 1021 0.000 000 000 000 000 000 001 sextillionth trilliardth 1991 yocto y 10008 1024 0.000 000 000 000 000 000 000 001 septillionth quadrillionth 1991 1. Prefixes adopted before 1960 already existed before SI. 1873 was the introduction of theCGS system. Comparison between the micro symbol and the Greek letter mu in Linux Libertine SI prefixes Contents
  • 2. Symbol encoding in character sets Other abbreviating conventions See also References The official symbol for the SI prefix micro- is a Greek lowercase mu (亮).[4] For reasons stemming from its design, there are two different characters in Unicode, which appear slightly different in some fonts, although most fonts use the same glyph. The micro sign (袖) is encoded in the "Latin-1 Supplement" range identical to ISO/IEC 8859-1 (since 1987), at U+00B5 ( Alt + 0181 ),[5] residing at this code point also in DEC MCS (since 1983) and ECMA-94 (since 1985). The Greek letter (亮) is encoded in the Greek range at U+03BC ( Alt + 956 ). According toThe Unicode Consortium, the Greek letter character is preferred,[6] but implementations must recognize the micro sign as well. In circumstances in which only the Latin alphabet is available, ISO 2955 (1974,[7] 1983[8]), DIN 66030 (Vornorm 1973;[9] 1980,[10][11] 2002[12]) and BS 6430 (1983) allow the prefix 亮 to be substituted by the letter u (or even U, if lowercase letters are not available), as, for example, in um for 亮m, or uF for 亮F. Similar, capacitor values according to the RKM code defined in IEC 60062 (IEC 62) (since 1952),EN 60062, DIN 40825(1973), BS 1852 (1974), IS 8186 (1976) etc. can be written as 4u7 (or 4U7) instead of 4亮7 if the Greek letter亮 is not available. In some health care institutions, house rules deprecate the standard symbol for microgram, "亮g", in prescribing or chart recording, because of the risk of misdose via the misreading of poor handwriting.[13] The two alternatives are to abbreviate as "mcg"[13] or to write out "microgram" in full (see also List of abbreviations used in medical prescriptions). But this deprecation, focused on bedside misdose avoidance in contexts where handwriting is often present, does not extend to all health-care contexts and institutions (for example, some clinical laboratories'reports adhere to it, whereas others do not[13]), and in physical sciences academia, "亮g" remains the sole official abbreviation. In medical data exchange according to theHealth Level 7(HL7) standard, the 亮 can be replaced by u as well.[14] Microgram Micrometre Microsecond Square micrometre List of commonly used taxonomic affixes 1. International Bureau of Weights and Measures (2006), The International System of Units (SI)(http://www.bipm.org/ut ils/common/pdf/si_brochure_8_en.pdf)(PDF) (8th ed.), ISBN 92-822-2213-6, archived (https://web.archive.org/web/2 0170814094625/http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf)(PDF) from the original on 2017-08-14 2. ISO 2955 (http://isotc.iso.org/livelink/livelink/4289384/ISO_2955-1983E_repr_of_SI_units_with_limited_char_sets.pd f?func=doc.Fetch&nodeid=4289384), table 2. 3. Biology by Campbell & Reece, tenth edition. Ch. 6 "A Tour of the Cell". p. 98. 4. Prefixes of the International System of Units(http://www.bipm.org/en/measurement-units/prefixes.html), International Bureau of Weights and Measures(page visited on 9 May 2016). 5. (Unicode 1.0, 1991) Symbol encoding in character sets Other abbreviating conventions See also References
  • 3. Retrieved from "https://en.wikipedia.org/w/index.php?title=Micro-&oldid=894364596" This page was last edited on 27 April 2019, at 12:04(UTC). Text is available under theCreative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to theTerms of Useand Privacy Policy. Wikipedia速 is a registered trademark of theWikimedia Foundation, Inc., a non-profit organization. 6. Unicode Technical Report #25(https://www.unicode.org/reports/tr25) 7. ISO 2955-1974: lnformation processing - Representations of SI and other units for use in systems with limited character sets(1st ed.). 1974. 8. "Table 2". ISO 2955-1983: lnformation processing - Representations of SI and other units for use in systems with limited character sets(http://isotc.iso.org/livelink/livelink/4289384/ISO_2955-1983E_repr_of_SI_units_with_limited_c har_sets.pdf?func=doc.Fetch&nodeid=4289384)(PDF) (2nd ed.). 1983-05-15. Retrieved 2016-12-14. [1] (http://ww w.bgu.ac.il/~averbukh/ISO_2955-1983E.pdf) 9. Vornorm DIN 66030[Preliminary standard DIN 66030] (in German). January 1973. 10. DIN 66030: Darstellungen von Einheitennamen in Systemen mit beschr辰nktem Schriftzeichenvorrat(in German) (1st ed.). 1980. 11. "Neue Normen f端r die Informationsverarbeitung"(http://www.computerwoche.de/a/neue-normen-fuer-die-information sverarbeitung,1184901). Computerwoche(in German). 1981-01-09.Archived (https://web.archive.org/web/20161214 025700/http://www.computerwoche.de/a/neue-normen-fuer-die-informationsverarbeitung%2C1184901)from the original on 2016-12-14. Retrieved 2016-12-14. 12. DIN 66030:2002-05 - Informationstechnik - Darstellung von Einheitennamen in Systemen mit beschr辰nktem Schriftzeichenvorrat(https://www.beuth.de/de/norm/din-66030/50570368) [Information technology - Representation of SI and other units in systems with limited character sets] (in German).Beuth Verlag. May 2002. Retrieved 2016-12-14. 13. Burtis, Carl A.; Ashwood, Edward R.; Bruns, David E. (2012),Tietz Textbook of Clinical Chemistry and Molecular Diagnostics(https://books.google.com/books?id=BBLRUI4aHhkC&pg=PT2241#v=onepage&q&f=false)(5th ed.). 14. "Commonly Used UCUM Codes for Healthcare Units"(http://download.hl7.de/documents/ucum/ucumdata.html). HL7 Deutschland e.V. Retrieved 2015-11-21.