フェノール指数
WordNet
- any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups
- a constant number that serves as a measure of some property or characteristic
PrepTutorEJDIC
- フェノール,石炭酸(消毒薬に用いる)
- (数学で)係数,(物理で)係数,率
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/08/06 22:10:37」(JST)
[Wiki en表示]
Phenol coefficient is a measure of the bactericidal activity of a chemical compound in relation to phenol. When listed numerically, the figure expressing the disinfecting power of a substance by relating it to the disinfecting power of phenol may be a function of the standardized test performed. For example, the Rideal-Walker method gives a Rideal-Walker coefficient and the U.S. Department of Agriculture method gives a U.S. Department of Agriculture coefficient.
To calculate phenol coefficient, the concentration of phenol at which the compound kills the test organism in 10 minutes, but not in 5 minutes, is divided by the concentration of the test compound that kills the organism under the same conditions (or, probably more common, dividing the dilution factor at which the tested substance shows activity by the dilution factor at which phenol shows comparable activity). The phenol coefficient may be determined in the presence of a standard amount of added organic matter or in its absence.
A related way to express the bactericidal activity of an agent (at a given concentration) is by employing the formula k = N/C·T where N is the number of surviving cells, C is the concentration of agent applied and T is the time for which the agent is applied, so k is inversely proportional to dose (C·T is collectively called dose).
One way to compare disinfectants is to compare how well they do against a known disinfectant and rate them accordingly using the Phenol coefficient. The disinfectant to be tested is compared with phenol on a standard microbe (usually Salmonella typhi or Staphylococcus aureus). Disinfectants that are more effective than phenol have a coefficient > 1. Those that are less effective have a coefficient < 1.
References[edit source | edit]
Dorland's Illustrated Medical Dictionary. (2004). Phenol c. Obtained Nov. 6, 2006. Salmonella typhosa is used as test organism for this test.
UpToDate Contents
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English Journal
- Antiradical activity of different parts of Walnut (Juglans regia L.) fruit as a function of genotype.
- Akbari V, Jamei R, Heidari R, Esfahlan AJ.SourceDepartment of Biology, Faculty of Science, Urmia University, Serow Road, Urmia, Iran. Electronic address: akbarivali.bio85@yahoo.com.
- Food chemistry.Food Chem.2012 Dec 15;135(4):2404-10. doi: 10.1016/j.foodchem.2012.07.030. Epub 2012 Jul 20.
- The objective of this work was to analyse phenolic compounds and antiradical capacity of different parts of walnut fruit among six genotypes of Juglans regia L. Therefore, total phenolic and flavonoid content were determined and methanolic extracts of walnut genotypes were considered by the reducing
- PMID 22980820
- Removal of phenol from synthetic waste water using Gemini micellar-enhanced ultrafiltration (GMEUF).
- Zhang W, Huang G, Wei J, Li H, Zheng R, Zhou Y.SourceMOE Key Laboratory of Regional Energy and Environmental Systems Optimization, Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
- Journal of hazardous materials.J Hazard Mater.2012 Oct 15;235-236:128-37. Epub 2012 Jul 20.
- Comprehensive studies were conducted on the phenol wastewater ultrafiltration (UF) with the help of various concentrations of cationic Gemini surfactant (N1-dodecyl-N1,N1,N2,N2-tetramethyl-N2-octylethane-1,2-diaminium bromide, CG), conventional cationic surfactant (dodecyl trimethyl ammonium bromide
- PMID 22863578
Japanese Journal
- 吉田 圭吾,清水 有星,飯塚 博
- 日本機械学会論文集 81(827), 15-00098-15-00098, 2015
- … The rice bran carbon (RBC) is manufactured by impregnating a phenol resin with the rice bran, and carbonizing in 900 °C nitrogen gas atmosphere. … The friction coefficient was almost the same for the samples which was mixed with graphite and RBC. …
- NAID 130005089678
- 吉田 圭吾,清水 有星,飯塚 博
- 日本機械学会論文集 advpub(0), 2015
- … The rice bran carbon (RBC) is manufactured by impregnating a phenol resin with the rice bran, and carbonizing in 900 °C nitrogen gas atmosphere. … The friction coefficient was almost the same for the samples which was mixed with graphite and RBC. …
- NAID 130005085638
- S1160103 フェノール樹脂歯車の運転性能評価に関する一考察([S116-01]伝動装置の基礎と応用(1),機素潤滑設計部門)
- 城垣 圭祐,中村 守正,浅井 啓二,五十嵐 俊一,射場 大輔,森脇 一郎
- 年次大会 : Mechanical Engineering Congress, Japan 2014, "S1160103-1"-"S1160103-3", 2014-09-07
- … Operating performance of glass or carbon fiber-reinforced phenol gears have been evaluated under high rotation speed such as 5000min^<-1>. … It was found from operating tests that service life of phenol gears reinforced by carbon fiber was larger than those reinforced by fibers including glass fiber. …
- NAID 110009945257
Related Links
- Definition of phenol coefficient in the Medical Dictionary. phenol coefficient explanation. Information about phenol coefficient in Free online English dictionary. What is phenol coefficient? Meaning of phenol coefficient medical term ...
- phenol coefficient noun Chemistry. the number indicating the effectiveness of a disinfectant as a germicide relative to phenol, which is arbitrarily assigned the number 1: based on the time required to kill a given quantity of a specific ...
Related Pictures
★リンクテーブル★
[★]
- 英
- phenol coefficient, PC
- 同
- 石炭酸係数 carbolic coefficient、フェノール係数 phenol index
- 関
- フェノール
[★]
- 関
- moduli、modulus