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- Chemistry; Chem Sci/Eng
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- 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. Alconox, Inc.
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- 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
by - 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
by - 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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- Chemistry; Chem Sci/Eng
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- In ambiente acquoso, molecole che hanno parti polari o ioniche e parti non polari (molecole anfifiliche) formano aggregati di molecole, detti micelle. Nelle micelle, le parti polari si trovano sulla superficie dell’aggregato in contatto con l’acqua, mentre le parti non polari sono segregate all’interno. La parte interna di una micella, formata da lunghe catene alchiliche non polari, è simile ad una goccia di olio o di benzina. Università di Napoli Federico II - by Serena Arduini
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- Le strutture delle micelle possono avere diverse forme: sferiche, cilindriche, lamellari e discoidali. Nei solventi polari in genere la parte idrofobica e lipofilica si orienta all’interno di una sfera, mentre la parte idrofilica si orienta all’esterno. In solventi apolari l’orientamento è inverso (si parla di micella inversa). - Wikipedia
by Serena Arduini - Il modo nel quale le caseine si aggregano all'interno del latte è oggetto di ampio dibattito. Lo schema attualmente più accettato è presentato sotto forma di disegno dal Prof. Douglas dell'università di Guelph [4] (per una review di tutti i modelli proposti ad oggi si veda il lavoro di Phadungath)[5]. Secondo tale schema la micella di caseine è pressappoco sferica, fortemente idratata e molto aperta allo scambio di acqua con la fase continua. Le catene polipeptidiche interne sono legate a dare una matrice (in inglese cross-linked) per mezzo di inclusioni di calcio fostato grandi alcuni nanometri. - Wikibooks - Chimica organica
by Serena Arduini - I saponi in acqua formano strutture sopramolecolari dette “micelle” (delle microscopiche gocce): le code apolari degli acidi grassi, che fuggono l’acqua, sono rivolte verso il centro della micella mentre la testa polare (il gruppo carbossilico dissociato –COO-) è rivolto verso l’acqua perché è carico (interagisce con gli H parzialmente positivi dell’acqua). Quindi il centro della micella è apolare. - Studenti.it - I lipidi
by Serena Arduini - Related KudoZ question
Compare [close] - Czech
- Chemistry; Chem Sci/Eng
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- Micely jsou shluky molekul tenzidů dispergované v kapalném médiu. Typická micela ve vodném roztoku vytváří agregáty s hydrofilní částí molekuly orientovanou do vodného prostředí a hydrofóbní částí skrytou uvnitř. wikipedia - by David König
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- Hydrofobní konce molekul se snaží minimalizovat kontakt s vodným prostředím, což vede ke tvorbě micel – tvorbou micel se snižuje energie systému. - wikipedia
by David König - Related KudoZ question
Compare [close] - Bulgarian
- Chemistry; Chem Sci/Eng
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- Мицелите - динамично променящи се структури с полуживот части от секундата.
Физикохимия - Лекция 8 - by DDraganova
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- За целите на тези критерии "повърхностноактивно вещество" означава всяко органично вещество и/или препарат, използвано в детергентите, което притежава повърхностноактивни свойства и което се състои от една или няколко хидрофилни групи и от една или няколко хидрофобни групи от такова естество и размер, че е в състояние да намали повърхностното напрежение на водата и да образува мономолекулни слоеве с покривен или адсорбиращ ефект на границата вода — въздух, както и да образува емулсии и/или микроемулсии, и/или мицели, и да позволява адсорбция на границата вода — твърдо тяло. - Достъп до правото на �
by DDraganova - Изучават се свойствата на моделни надмолекулни липид-протеинни структури – мицели, монослоеве, бислоеве, везикули, микро- и наночастици, по-сложно организирани системи и новите методи за тяхното изучаване. - БИОФИЗИКОХИМИЯ - Анот�
by DDraganova - Related KudoZ question
Compare [close] Compare [close] - Greek
- Chemistry; Chem Sci/Eng
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- μικήλλιο
(χημ.) συσσωμάτωμα πολύ μικρών διαστάσεων αποτελούμενο από μερικές δεκάδες έως εκατοντάδες άτομα, ιόντα, ή μόρια, χαλαρά συνδεδεμένα μεταξύ τους.
lexilogia - by Argyro Verganelaki
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- Η κρυστάλλωση των διαλυτοποιημένων μεμβρανικών πρωτεϊνών παρουσιάζει ιδιαίτερη δυσκολία, διότι η πρωτεΐνη περιβάλλεται από το μικκύλιο του απορρυπαντικού, το οποίο αποτελεί κρίσιμο παράγοντα για το σχηματισμό του κρυσταλλικού πλέγματος - Πανεπιστήμιο Κρήτης
by Argyro Verganelaki - Related KudoZ question
Compare [close] - Catalan
- Chemistry; Chem Sci/Eng
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- Agregació de molècules amfipàtiques en un medi aquós formant una estructura esfèrica en què les porcionshidrofòbiques es troben a l'interior i les porcions hidròfiles a l'exterior, en contacte amb l'aigua. TERMCAT - by iolanda casacuberta
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- Els lípids vénen de l'estómac en forma de gotes. En arribar al duodè es produeix l'emulsió, procés en el què les micel·les de sals biliars provoquen la fragmentació/disgregació de les gotes de lípid, en diminutes gotes, així hi ha més TAGs exposats en la superfície. - wapedia
by iolanda casacuberta - La pressurització de la llet de cabra provoca la modificació de l'estructura de la micel·la de caseïna. En tractaments a 20 ºC, es produeix una disgregació amb la formació posterior de cadenes de submicel·les. - Universitat Autònoma de Barcelona
by iolanda casacuberta - Com aquestes es mouen, aquest moviment facilita que el greix enganxat a la roba deixi d'estar adherit a ella: es formen micel·les de greix que es dispersen per la dissolució (aigua-sabó): en definitiva, netegem gràcies al sabó - xtec
by iolanda casacuberta - Related KudoZ question
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