Quantitative characteristics and chemical composition in Caspian roach (Rutilus rutilus caspicus) sperm

In this study, quantitative characteristics and chemical composition of in roach (Rutilus rutilus caspicus) sperm were investigated. Sperm traits included sperm movement duration, percentage of motile spermatozoa, sperm density, spermatocrit and sperm volume. Some seminal plasma characteristics (sodium, potassium, calcium, magnesium and chloride) were investigated. In addition, some metabolites of seminal plasma (glucose, cholesterol and protein) were measured. The Na+ and K+ ions correlated negatively with spermatozoa motility (r = -0.0518, p<.05 and r =-0.3597, p<.01) respectively. Also, there were significant positive correlations between Ca2+ and Cl- ions with spermatozoa motility (r = 0.2945, p<.05 and r= 0.1379, p<.01), respectively. Mg+2 was positively correlated with glucose and protein (r = 0.046, p<.05 and r = 0.694, p<.05), respectively. On the other hand, a significant positive relationship was found between Na+ and K+ (r = 0.548, p<.01). These parameters can be used to evaluation of sperm quality and collecting information about developing procedures for artificial fertilization of roach

The influence of ovarian fluid on the sperm physiology of Rutilus kutum

Motility parameters of the spermatozoa in most fish species spawning in fresh water like Rutilus kutum lasts for a short time after activation. Ovarian fluid significantly influenced sperm motility (motility duration period) and percent motility (progressive forward motile sperm). Both of these variables generally increased as the concentration of ovarian fluid increased from 33% to 50%, respectively. It is concluded that ovarian fluid enhances sperm movement in this species at appropriate level and thus has the potential to influence fertilization capacity

Multi-Response Design Optimisation of a Combined Fluidised Bed-Infrared Dryer for Terebinth (Pistacia atlantica L.) Fruit Drying Process Based on Energy and Exergy Assessments by Applying RSM-CCD Modelling

The present investigation aimed to perform an optimisation process of the thermodynamic characteristics for terebinth fruit drying under different drying conditions in a fluidised bed-infrared (FBI) dryer using response surface methodology (RSM) based on a central composite design (CCD) approach. The experiments were conducted at three levels of drying air temperature (40, 55, and 70 °C), three levels of drying air velocity (0.93, 1.765, and 2.60 m/s), and three levels of infrared power (500, 1000, and 1500 W). Energy and exergy assessments of the thermodynamic parameters were performed based on the afirst and second laws of thermodynamics. Minimum energy utilisation, energy utilisation ratio, and exergy loss rate, and maximum exergy efficiency, improvement potential rate, and sustainability index were selected as the criteria in the optimisation process. The considered surfaces were evaluated at 20 experimental points. The experimental results were evaluated using a second-order polynomial model where an ANOVA test was applied to identify model ability and optimal operating drying conditions. The results of the ANOVA test showed that all of the operating variables had a highly significant effect on the corresponding responses. At the optimal drying conditions of 40 °C drying air temperature, 2.60 m/s air velocity, 633.54 W infrared power, and desirability of 0.670, the optimised values of energy utilisation, energy utilisation ratio, exergy efficiency, exergy loss rate, improvement potential rate, and sustainability index were 0.036 kJ/s, 0.029, 86.63%, 0.029 kJ/s, 1.79 kJ/s, and 7.36, respectively. The models predicted for all of the responses had R2-values ranging between 0.9254 and 0.9928, which showed that they had good ability to predict these responses. Therefore, the results of this research showed that RSM modelling had acceptable success in optimising thermodynamic performance in addition to achieving the best experimental conditions.info:eu-repo/semantics/publishedVersio

Incidence of Acne vulgaris in the schoolsof Sari, Iran during 2003-2004

Background and purpose: Acne vulgaris is a very common cutaneus disorder as chronic inflammation of sebaceous glands of the skin of face, chest and back that affects everyone almost once in life time. The goal of this study was to determine the prevalence of Acne vulgaris in schools of Sari in 2003-2004.Materials and Methods: In this cross-sectional-analytical study, stratified sampling method was used, to divide male and female groups, and then a multistage random sampling was performed. All of the samples were examined for Acne vulgaris by a dermatologist, according to reliable clinical and diagnostic criteria. Questionnaires containing demographic, epidemiologic and clinical variables were filled in accordingly.Results: Two hundred samples from each stratum (400 overall), with a mean age of 15±1.51 and range of 12 of 18 years were selected. One hundred and sixty three subjects (40.75 %) were affected, 50 (30.6 %) male and 113 (69.4 %) female with the condition being mild in 150 (92.02 %) and moderate in 13 (7.98 %) of the patients. The highest prevalence was in 16 years olds 52 (62.65 %) and the lowest was 2 (7.4 %) in 12 years olds.Conclusion: According to the relatively high prevalence of Acne vulgaris in puberty, especially in females, performing continuous epidermiologic studies can be a good step for interventional studies, and preventing psychologic problems caused by the disease and hence increasing the health level of the community

Assessment of the frequency of all kinds of cutaneous warts in school age male students in Behshahr in 2003-2004

Abstract Background and purpose: Warts are benign epidermal lesions, caused by human papilloma viruses (HPVS). These lesions occur in different body surfaces with different shapes, and they are sometimes predisposing factors for some kinds of malignancies.Determining the frequency of all kinds of cutaneous warts in male students of primary, guidance and high schools in Behshahr in 2003-2004 was the main objective of this study.Materials and Methods: In this descriptive study, 1200 male students of primary, guidance and high schools between 7 to 18 years of age were randomly allocated and divided into 3 groups each with 400 students. Subjects of each group were examined by a dermatologist, according to valid clinical and diagnostic indicators about affliction to all kinds of cutaneous warts. Epidemiological and clinical data were collected in questionnaires and were analyzed using descriptive statistical tests and SPSS software. Results: Our study showed the total frequency of warts to be 10.4%. They were most common in students of high school with 12.3% . One hundred and nineteen cases were common wart, 20 plantar, 5 flat, 4 filiform and 1 was anogenital wart.Conclusion: Epidemiological studies can play a basic role in interventional health therapeutic studies in society for reduction of incidence, morbidity, and mortality of dermatological diseases, followed by improvement of society health

U-shaped microstrip patch antenna with novel parasitic tuning stubs for ultra wideband applications

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Very ultra-wideband printed CPW-fed slot antenna

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