130:(lowering interfacial tension). At these surfaces they naturally orient themselves with their head groups in water and their tails either sticking up and largely out of water (as at the air-water interface) or dissolved in the water-immiscible phase that the water is in contact with (e.g. as the emulsified oil droplet). In both these configurations the head groups strongly interact with water while the tails avoid all contact with water. Surfactant molecules also aggregate in water as
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draw oily substances into their hydrophobic cores, explaining the basic action of soaps and detergents used for personal cleanliness and for laundering clothes. Micelles are also biologically important for the transport of fatty substances in the small intestine surface in the first step that leads
122:(or amphipathic), having a hydrophilic, water interactive "end", referred to as their "head group", and a lipophilic "end", usually a long chain hydrocarbon fragment, referred to as their "tail". They congregate at low energy surfaces, including the air-water interface (lowering
167:, a common cosmetic ingredient often used in sunscreens, penetrates the skin particularly well because it is not very lipophilic. Anywhere from 0.4% to 8.7% of oxybenzone can be absorbed after one topical sunscreen application, as measured in urine excretions.
80:(translated as "fat-loving" or "fat-liking"). Such non-polar solvents are themselves lipophilic, and the adage "like dissolves like" generally holds true. Thus lipophilic substances tend to dissolve in other lipophilic substances, whereas
276:
H. Gonzalez, H., Farbrot, A., Larko. O., and
Wennberg, A. M. (2006). "Percutaneous absorption of the sunscreen benzophenone-3 after repeated whole-body applications, with and without ultraviolet irradiation".
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Hanson KM, Gratton E, Bardeen CJ. (2006). "Sunscreen enhancement of UV-induced reactive oxygen species in the skin".
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Lipophilicity, hydrophobicity, and non-polarity may describe the same tendency towards participation in the
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Affinity of a molecule or a moiety for a lipophilic environment
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Cell membranes are bilayer structures principally formed from
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27:"Lipophilia" redirects here. For the paraphilia, see
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List of boiling and freezing information of solvents
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150:head groups attached to two long alkyl tails.
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161:because fluorocarbons are not lipophilic.
95:" are not synonymous, as can be seen with
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265:Free Radical Biology & Medicine
215:Compendium of Chemical Terminology
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48:"friendly") is the ability of a
235:Invitation to Organic Chemistry
279:British Journal of Dermatology
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231:Alyn William Johnson (1999).
597:Inorganic nonaqueous solvent
76:. Such compounds are called
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582:Acid dissociation constant
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547:Solubility table (data)
414:Apparent molar property
221:, accessed 15 Jan 2007.
177:Ionic partition diagram
157:are not amphiphilic or
118:are compounds that are
89:London dispersion force
512:Total dissolved solids
507:Solubility equilibrium
432:and related quantities
612:Partition coefficient
592:Polar aprotic solvent
527:Enthalpy of solution
454:Volume concentration
449:Number concentration
668:Chemical properties
439:Molar concentration
409:Dilution (equation)
187:Lipophilic bacteria
479:Isotopic abundance
444:Mass concentration
318:Chemical solutions
66:non-polar solvents
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250:978-0-7637-0432-2
155:fluorosurfactants
50:chemical compound
16:(Redirected from
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552:Solubility chart
379:Phase separation
339:Aqueous solution
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44:λίπος "fat" and
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153:By contrast,
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38:Lipophilicity
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29:Fat fetishism
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489:Ternary plot
484:Mixing ratio
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642:Lyonium ion
557:Miscibility
542:Henry's law
120:amphiphilic
116:surfactants
112:Hydrocarbon
107:Surfactants
93:hydrophobic
82:hydrophilic
18:Fat-soluble
637:Amphiphile
632:Lipophilic
627:Hydrophile
622:Hydrophobe
499:Solubility
394:Saturation
364:Suspension
219:lipophilic
203:References
165:Oxybenzone
159:detergents
78:lipophilic
647:Lyate ion
602:Solvation
517:Solvation
459:Normality
148:phosphate
128:emulsions
97:silicones
662:Category
617:Polarity
576:Category
464:Molality
326:Solution
171:See also
136:Micelles
132:micelles
68:such as
567:Solvent
369:Colloid
359:Mixture
114:-based
74:toluene
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70:hexane
64:, and
62:lipids
40:(from
389:Alloy
182:ITIES
46:φίλος
42:Greek
245:ISBN
99:and
58:oils
54:fats
241:283
72:or
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310:e
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