فهرست مطالب m. borhani

Due to the efficiency of 17-4PH steel in gas turbines and contact with external particles such as dust and foreign objects, physical deposits such as oil vapors will undergo cracks, wear, and chemical corrosion during operation and will be removed from the cycle of use. Part replacement is not cost-effective due to the high cost of raw materials. In this research, the corrosion resistance of 17-4PH steel cladding and stellite6 on 17-4PH steel substrate was investigated by the Tafel polarization test; In the cyclic polarization curve for 17-4PH steel, the direct scan current density is lower than the reverse scan, and positive hysteresis is seen in the cyclic polarization curve. Also the partially formed passive layer is unstable and fragile. In the 17-4PH cladding, the direct scan current density is lower than the reverse scan, and positive hysteresis is observed in the polarization curve. Also the formed passive layer is resistant to the formation of new holes. In the cover of stellite6, according to the shape of this cover, it has high pitting corrosion resistance in this solution; It forms a negative hysteresis curve and its inverse curve is located in a lower current density than the straight curve; Therefore, the corroded areas can repair themselves by forming a passive layer. By examining the results, it was found that the corrosion rate of stellite6 and stainless steel claddings has decreased by 91% and 50% compared to the substrate.

Varroa spp. is an important ectoparasite in the honey bee that is distributed worldwide and it may cause to decrease in the population in the honey bee colonies. This study was conducted to determine the frequency of seasonal distribution of Varroa mite in apiaries of Kerman province from 2017-to 2018. 1500 hives were sampled randomly in different apiaries in the Kerman province. Detection of   Varroa spp. infestation in adults honey bees was conducted by Ether wash. The prevalence of Varroa spp infestation in apiaries was 32.9%. The highest frequency of infection in winter was determined as 46.6% and the lowest infection rate was found in spring (24%). The highest and lowest mean density rate of infestation were 33% and 17%.  Regarding the rate of prevalence of Varroa spp in the apiaries of Kerman province, it needs to have a regular control program in order to decrease the rate of infestation in this region.

Many people with hypertension are unaware of their problem. As hypertension may have no warning signs and causes serious complications, designing effective interventions to sensitize the community towards its control is necessary. The current study aimed to evaluate the effectiveness of self-care educational programs for hypertension in rural areas.

In this quasi-experimental study, 136 patients with hypertension from rural areas of Minodasht county were studied in 2019. Two-stage random cluster sampling was used to select participants. Data were collected by a self-administered questionnaire whose validity and reliability were assessed. The questionnaire consisted of demographic and related outcomes parts (adherence to diet and drug therapy, physical activity, adherence to control (measurement) of blood pressure, and feelings related to behavior). Data were analyzed using paired t-tests and covariance by SPSS 19.

Based on the paired t-test, the mean of measured dimensions was significantly increased after providing the intervention (p<0.05). The covariance analysis was also statistically significant (p<0.05), after removing the pre-test effects of variables.

This study showed the positive effects of educational interventions on those who suffer from hypertension. Educational programs, as a core component of health promotion, can improve the knowledge, attitudes, and skills of trainees to maintain and adhere to promote their health.

Traditional Iranian Medicine (TIM) is a comprehensive medical system، which is different from the modern medicine in various aspects. To find out why the TIM is considered a comprehensive medical system، the philosophical foundations of the TIM in the fields related to medical sciences، medical profession، and clinical practice should be defined. In this paper، with a rational and philosophical (rather than historical) approach، we have addressed scientific reasoning in the TIM، with the results related to the field of medical philosophy (as one of the second-order philosophies). The thinking system of TIM and modern medicine are different in their approach to man، life، and health; definition of basic concepts such as health، disease، and treatment; theorizing the medical sciences; and employment of comparative and deductive logics. The current paper addresses these topics. In the paper، we have attempted to demonstrate how the thinking system of the TIM has influenced principles of diagnosis، rational of clinical decision making، different levels of disease treatment، and evaluation of a hypothesis in clinical experiences

We evaluated 229 cases of children who were born in the first half of the year. These cases refered to the ten health centers in Rasht in 1995. There were 116 (50.66%) boys and 113 (49.34%) girls in this research. We saw that 96 boys were feed through the breast milk in the first four months, and 20 boys were feed through the formula and we saw 102 girls out of 113 were feed through the breast milk and 11 girls were feed through the formula. According our growth chart we understood that: 1) New separate chart is needed for breast fed Infants. 2) Breast fed infants were leaner than their counterparts, the slower growth and lower energy intake of the breast fed infants were associated with normal accelerated development and they were less morbidity from infectious illness. We had shown that breast feeding has increased about fifth fold. It is due to promotion of breast milk feeding with the university and health centers. The rule of Islamic religion was an important factor in the promotion of breast feeding. Finally the most important factor which was effective in the loss of breast milk, is insufficient breast milk that it is misapprehension.