Characterization Of Graphene Oxide Nanofilms Obtained By The Saw Atomization

Due to its ability to absorb water molecules, graphene oxide (GO) is considered a promising material for sensitive coatings in fast surface acoustic wave (SAW) humidity sensors. In this work, we characterize GO films obtained by the SAW atomization technique. It is shown that the atomized submicroliter droplets of aqueous suspension of GO can be deposited onto the surface of Si, LiNbO3 or quartz substrates forming discrete or continuous films of nanometer thickness. The deposited films were examined using AFM and electron microscopy. We discuss the dependence of thickness and structure of the obtained GO films on the parameters of deposition: the number of atomized droplets, a volume of the initial droplet, a distance between the atomizer and the sample, etc. To evaluate the adsorption characteristics of the obtained GO films, we used them as sensitive coatings of the SAW humidity sensors. We found that the adsorption characteristics of the GO films are determined by fast adsorption on the surface of GO sheets and slow adsorption, attributed to limited penetration of water molecules between the sheets, and depend on the number of deposited layers.7

Characterization of graphene oxide nanofilms obtained by the saw atomization

Due to its ability to absorb water molecules, graphene oxide (GO) is considered a promising material for sensitive coatings in fast surface acoustic wave (SAW) humidity sensors. In this work, we characterize GO films obtained by the SAW atomization technique. It is shown that the atomized submicroliter droplets of aqueous suspension of GO can be deposited onto the surface of Si, LiNbO3 or quartz substrates forming discrete or continuous films of nanometer thickness. The deposited films were examined using AFM and electron microscopy. We discuss the dependence of thickness and structure of the obtained GO films on the parameters of deposition: the number of atomized droplets, a volume of the initial droplet, a distance between the atomizer and the sample, etc. To evaluate the adsorption characteristics of the obtained GO films, we used them as sensitive coatings of the SAW humidity sensors. We found that the adsorption characteristics of the GO films are determined by fast adsorption on the surface of GO sheets and slow adsorption, attributed to limited penetration of water molecules between the sheets, and depend on the number of deposited layers7

Alcohol consumption among pregnant and non-pregnant women in Russia: evidence for prevention

Background. Russia has one of the highest levels of alcohol consumption in the world and increasingly hazardous drinking inyoung women. Prenatal alcohol exposure is associated with adverse pregnancy outcomes and Fetal Alcohol Spectrum Disorders (FASD) in children. Data on women's alcohol consumption and risk for alcohol-exposed pregnancies necessary for developing prevention of FASD in Russia are limited. Aims: to estimate the prevalence of alcohol use and hazardous drinking and risk for alcohol-exposed pregnancies in women of childbearing age. Materials and methods. Women were recruited at public women's clinics in two regions in Russia. Women of childbearing age (n = 648) completed a face-to-face structured interview which assessed alcohol consumption and contraception use. Results. Among non-pregnant women, 89 % reported consuming alcohol and 65 % reported binge drinking in the last three months; 70 % of women in Nizhny Novgorod Region and 44 % in Saint-Petersburg may become pregnant, including 12 % in Nizhny Novgorod Region and 9 % in Saint-Petersburg who were trying to conceive. These women consumed alcohol at similar rates and amounts as women who were not at-risk for pregnancy. Among currently non-pregnant women, 32 % in Saint-Petersburg and 54 % in Nizhny Novgorod Region reported not using contraception consistently and at-risk drinking; therefore, they were at risk for alcohol-exposed pregnancy. After pregnancy identification: 20 % reported continued drinking. Significant differences in drinking and risk for alcohol-exposed pregnancy between women in Saint-Petersburg and Nizhny Novgorod Region were identified. Conclusions. Although the majority of Russian women decrease alcohol consumption after pregnancy identification, high levels of drinking were reported around conceptions and prior to pregnancy identification

THE STUDY OF INTERCORRELATION ALCOHOL USAGE WOMEN WITH THEIR UNDERSTANDING OF ALCOHOLIC BEHAVIOR

The article shows a fragment of research grant project results of the study of psychological factors that influence the alcohol consumption by childbearing age women in Russia. Research materials of sample of 360 non-pregnant women living in Nizhny Novgorod and Nizhny Novgorod region, at risk for alcohol use, described. Selected socio-psychological determinants of alcohol use by women of childbearing age in high-risk amounts, at the group level that are associated with the perceptions of women about drinking alcohol other people. Presentation about the use of alcohol by spouses of women significantly affect alcohol use by women (