ABSTRACT
Introduction: World Health organization stated that, approximately one third of the world' population older than 15 years are smokers. Cigarette smoking affects reproductive health in both men and women with poorly understandable mechanisms. Some of the studies focused on the relation between cigarette smoking and the principal semen analysis' variables such as concentration, Morphology and Motility. In this study, we compared the semen parameters between smokers and non-smokers fertile men with time to pregnancy less than one year
Materials and Methods: this case control study was done on proved fertile men in Assiut university hospital between March 2013 and September 2015. The subjects of the study were classified into 2 groups; smokers and non-smokers and their semen parameters were compared
Results: 93 fertile men were included in the present study. 50 non-smokers and 43 smokers the mean age of subjects was not significantly different between the two groups. There were no significant differences among groups according to semen volume, sperm concentration, total sperm count, motility and vitality. However, normal forms were statistically higher in nonsmokers than in smokers
Conclusion: according to our results, semen parameters [semen volume, sperm concentration, total sperm count, motility and vitality] were lower in smokers but without significant differences between groups. Normal forms were higher significantly in nonsmokers than in smoker's fertile men
ABSTRACT
Introduction: the WHO periodically releases manuals for the laboratory examination and processing of human semen. The WHO [2010] semen analysis criteria are likely to have a significant effect on the management of male infertility as the adoption of the new WHO reference values will likely lead to more men being classified as fertile
Aim of the work: to study and analyze the different semen parameters of fertile men in Assiut and comparing this with both WHO manuals 1999 and 20 10 parameters
Materials and Methods: this case control study was done on proved fertile men with time to pregnancy less than 1 year in assiut university hospital between March 20 13 and September 20 15
Results: 93 fertile men were included in the present study. The lower fifth centile for semen parameters were as follow, semen volume: 1.7, sperm concentration: 20 mill/ml, total sperm count: 45 mill/ejaculate, progressive motility: 42%, vitality: 70%, normal forms: 5%
Conclusion: according to our results, semen parameters in Assiut governorate is close to WH0, 2010 parameters and our results may also serve as reference values for future studies of fertile men from the general population in Egypt
ABSTRACT
Ferric/copper mixed oxides samples having the formula 0.25Fe2O3/CuO were prepared by thermal decomposition of their mixed hydroxides at 400 °C. The mixed hydroxides were prepared by cooprecipitation method using iron and copper nitrates solution using NaOH at pH = 8. The obtained solid was exposed to different doses of gamma-rays varying between 0.2 MGy and 1.6 MGy. The techniques employed were XRD, nitrogen adsorption measurements at -196 °C and ethanol and isopropanol conversion using micropulse technique at temperatures between 250-400 °C. The results obtained revealed that the investigated system consisted of nano crystalline CuO [major phase] and poorly crystalline Fe2O3 as a minor phase. The exposure to gamma-irradiation resulted in a measurable decrease a the crystallite size of CuO [major phase], a dose of 1.6 MGy brought about a significant drop in the crystallite size from 31.4 to 19.2 nm. This treatment led also to a progressive increase in the BET=surface area to an extent proportional to the dose of gamma-rays employed. The investigated solid samples acted as dehydration catalysts converting ethanol and isopropanol into ethene and propene, respectively. Their activity was found to increase by increasing the dose of gamma-rays reaching to a maximum limit at a dose of 0.4 MGy. However, a dose of 0.8 MGy led to a sudden drop in the catalytic activity of various solids which retained most of their initial activity upon exposure to a dose of 1.6 MGy. The results obtained were discussed in terms of the role of gamma-rays in modifying the chemistry of the surface of the treated solids and the decrease in the crystallite size with subsequence increase in their SBET
Subject(s)
Copper/chemistry , Oxides/chemistry , Gamma Rays/adverse effectsABSTRACT
The effects of gamma-irradiation [0.2, 0.4 and 0.8 MGy] on surface and catalytic properties of rice husk carbon activated by zinc chloride and steam have been investigated. The techniques imployed were nitrogen adsorption at -196°C and adsorption of carbon dioxide at room temperature and adsorption of sando cryl blue dye and H2O2 decomposition at 30-50°C. Also, the surface functional groups of different investigated carbon have been also determined by using neutralization with Na2CO3, NaHCO3, NaOH and NaOEt. The results revealed that the unactivated carbon measures a small specific surface area which increases upon [8-10 fold] by activation with ZnCI2 and stream. gamma-irradiation brought about a measurable significant increase in the specific surface area to an extent proportional to the dose of gamma-rays. The values of the specific surface area determined by the CO2 adsorption are much smaller than those measured by N2 adsorption this finding indicates the inaccessibility of a portion of micropore for CO2 adsorption. The investigated carbons acted as a catalyst of H2O2 decomposition and having activities much increased by activation either with ZnCI2 or steam and also by exposure to gamma-irradiation