Natural repeated backcrosses lead to triploidy and tetraploidy in parthenogenetic butterfly lizards (Leiolepis: Agamidae).

Obligatory parthenogenesis in vertebrates is restricted to squamate reptiles and evolved through hybridisation. Parthenogens can hybridise with sexual species, resulting in individuals with increased ploidy levels. We describe two successive hybridisations of the parthenogenetic butterfly lizards (genus Leiolepis) in Vietnam with a parental sexual species.

Active oxygen-associated control of rice blast disease by riboflavin and roseoflavin.

Exogenous riboflavin and its dimethylated amino(nor)-derivative roseoflavin were studied in their ability to protect susceptible rice plants from blast disease and to induce fungitoxicity mediated by active oxygen. Both compounds, either added to the inoculum (10 microg/ml) or to soil (40 mg/kg, two days prior to inoculation), induced disease resistance, i.e.

[Effect of brerlipril in patients with non-insulin dependent diabetes mellitus and mild or moderate arterial hypertension as indicated by 24-h blood pressure monitoring].

Aim: To study a hypotensive effect of berlipril, an ACE inhibitor, using 24-h BP monitoring in patients with non-insulin-dependent diabetes mellitus (NIDDM) combined with stable mild or moderate arterial hypertension (AH).

Materials And Methods: 22 NIDDM patients with mild or moderate AH were treated with berlipril. 24-h monitoring of BP was made in all the patients before and 3 months after the treatment.

[A method for studying the morbidity risk for sexually transmitted infections in youthful populations].

The method, developed on the basis of disperse analysis, includes anonymous questioning by multicomponent questionnaires containing several blocks of questions which cover the social composition, level of knowledge, behavioral and sexual orientation, control of the reliability of answers, etc. The correlative dependence of individual blocks permits the evaluation of the level and dynamics of the formation of microsocial environment at an institution. The use of this method makes it possible to differentiate youth subpopulations by the epidemiological importance of their risk of infection and its elements in the structure of an individual institution, to find out behavioral "groups of risk" and, in accordance with the data thus obtained, to build the system of propaganda adapted to these individual subpopulations and to the whole institution.

[Weight gain during pregnancy in relation to somatic types of women].

The paper presents findings on weekly weight gain in pregnant women as related to constitutional make-ups. Normal and apparently normal pregnant women who were followed up at an antenatal clinic from 7-8 to 40-41 week's gestation have been assigned at the beginning of pregnancy to three weight groups: normal body weight, excessive body weight due to increased fat deposition and deficient body weight. Anthropometric measurements at 7-8, 25-26 and 36-37 weeks showed that weight gain and fat accretion were highest in pregnancies with an initial deficient body weight and lowest in pregnant women with adiposity.