The electrostatics of micellar growth is reviewed and extended for solutions containing excess salt. In dilute solution the expansion of a linear micelle with increasing salt concentration is explained for a wide range of ionic strength. When the micellar charge density is very high, counterions condense nonuniformly onto the micellar rod. In that case the micelle may contract upon the addition...

Bu çalışmada, 5-Metil-4-(2-tiazolilazo)-resorsinolün spektroskopik ve elektrokimyasal davranışı üzerindeki yüzey aktif madde etkileri, nötr pH'ta sulu bir çözeltide incelenmiştir. Araştırmada dodesilpiridinyum klorür (DDPC), setilpiridinyum (CPC) (katyonik), Triton X100, Tween 20 (noniyonik) sodyum dodesil sülfat (SDS) (anyonik) kullanılmıştır. Yüzey maddenin eklenmesi üzerine boyarmaddenin abs...

Abstract The encapsulation of substrates within micellar structures gives rise to a multitude effects beyond simple solubilization in water. When incorporated photochemical reaction design media may offer possibilities control both reactivity and selectivity. Herein, we describe various important phenomena such as encapsulation, polarity differences, electrostatic interactions hydrogen bonding,...

in this work the acidity constants of thiamine in water and water-triton x-100 micelle media solutions, at 25 °c, have been determined spectrophotometrically. to evaluate the ph- absorbance data, a resolution based on the combination of soft-and hard-modeling is applied. the acidity constants of all related equilibria are estimated using the whole spectral fitting of the collected data to an es...

Dissolution behaviour of both 5, 5-diphenyl hydantoin sodium commonly known as dilantin sodium (DS) and its corresponding marketed capsule dilantin have been studied in aqueous as well as micellar media. Percentage dissolution of both DS and its marketed capsule are found to be low as expected in aqueous medium due to its very low solubility in water. However, their dissolution tendency is foun...

The H-point standard addition method (HPSAM), based on spectrophotometric measurements for simultaneous determination of beryllium and aluminium, is described. This method is based on the difference between their rates of reactions with Chrome Azurol S (CAS) in cetyltrimethylammonium bromide (CTAB) micellar media. The results showed that beryllium and aluminium could be determined simultaneousl...