Reference

Solution properties of mixed surfactant system

Solution properties of mixed surfactant system. II. Electric properties of anionic-nonionic surfactants in aqueous solutions. Ogino, Keizo; Tsubaki, Nobuyuki; Abe, Masahiko (Fac. Sci. Technol., Sci. Univ. Tokyo, Noda 278, Japan). J. Colloid Interface Sci., 98(1), 78-83 (English) 1984. CODEN: JCISA5. ISSN: 0021-9797. DOCUMENT TYPE: Journal CA Section: 66 (Surface Chemistry and Colloids) Section cross-reference(s): 68 Elec. properties of mixed anionic-nonionic surfactants in aq. solns. above the CMC were studied in term of pNa values, elec. conductivities, and dielec. consts. Elec. cond. 84425-94-5 and 9004-95-9 are cas registry numbers of chemicals which are used as reagents here. and dielec. const. were measured in the frequency range 220 Hz to 1 MHz. The degree of ionic dissocn. and the no. of effective carriers (Na+) of mixed micelle increase with increasing concn. of nonionic surfactant. In spite of the increase of the no. of carriers (Na+), the activation energy for conduction increases with increasing concn. of nonionic surfactant. This may be attributed to the fact that the surface charge densities of counterions of mixed micelles decrease with increasing mixed micellar sizes. .

Effect of the nonionic surfactant on the rectal absorption of gentamycin

Effect of the nonionic surfactant on the rectal absorption of gentamycin. II. Effect of aging of the experimental animals. Toya, Harumasa; Shinmen, Tomoji; Kato, Yoshiko; Yamazaki, Masaru; Kamada, Akira (Res. Lab., Sawai Pharm. Co., Ltd., Osaka 535, Japan). Chemotherapy (Tokyo), 31(12), 1109-13 (Japanese) 1983. CODEN: NKRZAZ. ISSN: 0369-4682. DOCUMENT TYPE: Journal CA Section: 1 (Pharmacology) Section cross-reference(s): 63 When a single dose of gentamycin (I) [1403-66-3] was administered rectally in dogs (2-4 mo old), the ratio of plasma concn. after this administration to that after i.m. administration was 13%, whereas in adult (1-2 yr-old) and old dogs (8-10 yr-old) I was scarcely absorbed. When the suppository base consisted of polyethyleneglycol cetyl ether [9004-95-9] (1%) the ratios in young, adult, and old dogs were 20.1, 15.6, and 11.6%, resp. 9004-95-9 and 1403-66-3 which are cas registry numbers of substances are two of reagents here. When the suppository base consisted of saponin (1%) the ratios were 24.2, 25.0, and 14.5%, resp. .