VARIA\ \4llol ĄlZLoDĄl'hlF-4w HRLL/Ucc_7'' VA'l' lN ho.kowlL_/' MlcH ĄL NACHAlsLl'i MlcHAL l\oloDŻlElcŻ\ r' ńolckulamcgo tll' RozplG?nig lo ZapcwnE]ą loz},uszczłlrc w wodzic i plJ'na.h Jśoowych górne€ o od.i a plawodu Po_ tarnow*onjcjonowczwiązkiPowioz.hniowo.z]'nnc (zPc) 2 3!UPy cshów Po1ioks),etylPnosolbihnólV z kUasańi lluszczolwni (,,TLvea/), stów kwasu sea ryńoilego z glikolami poliÓksyrt}'leńÓ ymi ("cten Pho/'), a iakże.blów slilÓli Pok,Ll]ret-vlenowych i al koholi dusz.zowy.h (,,Bril!, kóF $ rehnÓloBii Po$a.i lckóv Pclnią lunk j? biÓd*rad.walny.h .n l8atoróN isolubilizabró\'(pośrĆdnikćwroŻPlgĆŻalńoś.i) Związki Powielzchniowo.zynne z g py polioksyetylenowanych € strów kwasów tluszczorłJych cz' I. RówNowAcAH\.DRoFILowo_LIPoFIrowA {IJIB) I PARAMIm Ro7PUS7C7AL\oscl A T\T AKl \ |{Noicl PowltRzCHNlot\EJ l.RoDt KTó!\ oKs\.ETYLENowANtA EsTRów METYLowYcH KwAsów 1ŁUszczowYcH oLEJU RZEPAXOwEGO SURFACTANTS FROM TH! (;ROUP OF FI\TTY ACIDS POLYOXY, ETHYL'NATIID ESTERS P i I. HYDROPHYLIC.LPOPHILIC EQUILIB, RIUM (LILII),9OLUBILITY PARAMETER AND AfiPE OF SURFACE AC. TIVITY OF THE RAPE OIL F TTY AC]DS METHYL ESTERS OX1EI]IYLE. sunmrry-Posibiliiv of rhe appli.ation or done6h. surfa.bnb (zrc) fron llrc,,Rofam" sclies (ohi. acid oryelhyl.nated freihyl esleB) in a dfus fÓrn rf. oloq\. ' 'Pq.tr\aJB
Zwi¹zki powierzchniowo czynne z grupy polioksyetylenowanych estrów kwasów t³uszczowych Cz. II. PODSTAWOWE WIELKOOECI LEPKOOECIOWE A RÓWNOWAGA HYDROFILOWO-LIPOFILOWA PRODUKTÓW OKSYETYLENOWANIA ESTRÓW METYLOWYCH KWASÓW T£USZCZOWYCH OLEJU RZEPAKOWEGO * *) Streszczenie-Przedmiotem badañ by³y roztwory wodne szeregu homologicznego zwi¹zków powierzchniowo czynnych typu "Rofam" ró¿ni¹cych siê liczb¹ wbudowanych ugrupowañ tlenku etylenu. Okreoelono wp³yw liczby tych ugrupowañ na równowagê hydrofilowo-lipofilow¹, w³aoeciwooeci hydrodynamiczne oraz aktywnooeae powierzchniow¹. Wyniki pos³u¿y³y do okreoelenia mechanizmu solubilizacji i oszacowania wp³ywu tego procesu na dostêpnooeae farmaceutyczn¹ i biologiczn¹ micelarnego adduktu "Rofamów" w modelowych formach oerodków farmaceutycznych. S³owa kluczowe: solubilizacja, zwi¹zki powierzchniowo czynne, "Rofamy", roztwory wodne, równowaga hydrofilowo-lipofilowa, w³aoeciwooeci hydrodynamiczne, aktywnooeae powierzchniowa. SURFACTANTS FROM THE GROUP OF FATTY ACIDS POLYETHYLENATED ESTERS. PART II. BASIC VISCOMETRIC VALUES AND SOLUBILITY PARAMETER IN RELATION TO HYDROPHI-LIC-LIPOPHILIC BALANCE OF THE PRODUCTS OF OXYETHYLENATION OF RAPE OIL FATTY ACIDS METHYL ESTERS Summary-Aqueous solutions of homologous series of "Rofam" type surfactants (ZPC) based on rape oil fatty acids methyl esters, differing in oxyethylene segments content (nTE), were the subjects of investigations. Content of oxyethylene segments nTE, determined by 1 H NMR, allowed to verify ZPC molecular weight and to calculate structural hydrophilic-lipophilic balance (HLB, by Davis or Griffin methods) as well as required solubility level of the balance (HLB R) (Table 1). The following values were determined on the basis of viscometric measurements: limiting viscosity number [η], viscometric average molecular weight (M η), specific volume (Ω) and hydrodynamic radius of micelle (R obs) (Table 2 and 3). Viscometric measurements let also calculate average number of water molecules hydrating the micelle built of "Rofam" homologous structures. Determination of critical micellar concentration (cmc) was the base for calculation of thermodynamic potential of micelle formation () and micellar level of hydrophilic-lipophilic balance (HLBcmc) (Table 4, Fig. 1-3). The value of surfactant's lipophilic core upthrust over the phase boundary (Am, Fig. 4) let analyze the effect of oxyethylene segments' content in "Rofam" molecule structure on its potential solubilization properties. The results of investigations and the values calculated on this basis make clearer the mechanism of solubilization of lipophilic drugs what determines the pharmaceutical and biological availability of micellar adducts from the model forms of drugs.
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