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micelle

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17:54 Dec 11, 2009
English to Danish translations [PRO]
Tech/Engineering - Chemistry; Chem Sci/Eng
Additional field(s): Engineering: Industrial
English term or phrase: micelle
Definition from Alconox, Inc.:
A sub-microscopic aggregate of molecules. In the context of cleaners, these molecules are surfactants usually arranged in sphere or rod shapes with their hydrophilic ends facing outward into the water solution and hydrophobic ends facing the inside of the aggregate. Micelles can hold hydrophobic oil molecules at their centers to create stable emulsions.

Example sentence(s):
  • Grease and oil are nonpolar and insoluble in water. When soap and soiling oils are mixed, the nonpolar hydrocarbon portion of the micelles break up the nonpolar oil molecules. A different type of micelle then forms, with nonpolar soiling molecules in the center. Thus, grease and oil and the 'dirt' attached to them are caught inside the micelle and can be rinsed away. About.com
  • Using micelles for cleaning is not a new idea. Common household detergents contain micelles, which dramatically increase the capacity of the washwater to pick up organic contaminants. Micelles could likewise be used to remove organic contaminants from industrial waste streams. Massachusetts Institute of Technology
  • In a micelle, the tails of the soap molecules are oriented toward and into the grease, while the heads face outward into the water, resulting in an emulsion of soapy grease particles suspended in the water. Chemistryexplained.com/
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Summary of translations provided
5 +1micelle
Helle Sabroe


  

Translations offered


3 days 2 hrs   confidence: Answerer confidence 5/5 peer agreement (net): +1
micelle


Definition from http://intranet.sctknud-gym.dk/lrere/PB/:
Overfladeaktive stoffer indeholder molekyler, som er opbygget af en lang upolær kæde bestående udelukkende af carbonatomer og hydrogenatomer samt en polær ende. I vandige opløsninger vil de spontant kunne organisere sig i miceller, hvis koncentrationen overstiger den kritiske koncentration. Molekylernes upolære kæder vender i en micelle ind imod hinanden, mens de polære ender vender ud i den vandige opløsning. I denne øvelse fremstilles miceller med en diameter på 1-5nm.

Example sentence(s):
  • Micellernes indre kan ”opløse” upolære for¬bin¬delser, og hvis den upolære forbindelse er et farvestof bliver opløsningen herved farvet. - http://intranet.sctknud-gym.dk/lrere/PB/  
  • Detergenterne kan danne små kugler, miceller, hvor de nonpolære kæder vender ind mod hinanden og den polære del vender ud mod opløsningsmidlet. Da micellernes indre er nonpolært vil det have fedtopløsende egenskaber. Micellerne kan optage fedt i deres indre og være med til at opløse fedt i vaskevandet. Man siger, at fedtet danner en emulsion i vandet. Der dannes kun miceller, når koncentrationen af et overfladeaktivt stof er større end en bestemt koncentration. Denne koncentration kaldes den kritiske micelle koncentration (CMC, fra engelsk Critical Micelle Concentration). For forskellige overfladeaktive stoffer gælder der forskellige CMC’er. - H. C. Ørsted Ungdomslaboratorium  
Helle Sabroe
Local time: 23:00
Native speaker of: Native in EnglishEnglish, Native in DanishDanish

Votes in favor of/against selecting this as the best translation of the term asked
Yes  NetLynx: Ja, simpelthen ...
3 days 3 hrs
  -> Tusind tak!
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