[Medical and social implications of sexual dysfunction and safety of antihypertensive therapy in hypertensive patients].

To determine the effect of valsartan on the androgen status and erectile function in hypertensive patients. 60 hypertensive patients of 40-65 years of age were included in the study. All patients filled in the questionnaire on aging male symptoms scale and international index of erectile function before and 3 months after the course of antihypertensive therapy.

Hydrophobically Associating Alginate Derivatives: Surface Tension Properties of Their Mixed Aqueous Solutions with Oppositely Charged Surfactants.

The comparative study of the interfacial properties of an anionic polysaccharide, sodium alginate (Alg), and its hydrophobically modified derivative (Alg-C(12)), covalently substituted by dodecyl chains (12% mol/mol saccharide unit), was carried out in the absence or in the presence of an oppositely charged surfactant, dodecyltrimethylammonium bromide (DTAB). The drastically different behaviors which were observed are interpreted in terms of the arrangement and mobility of the hydrophobic long alkyl chains, depending on the nature of their fixation, covalent or ionic, on the polysaccharide backbone. Copyright 2000 Academic Press.