• List of Articles


      • Open Access Article

        1 - Optimization of Alkaline Protease Enzyme Using Statistical Methods
        Marzieh  Keyhanian
        the extensive usage of proteases in industries such as pharmacy, nutritious, weaving, paper production, curriery, detergent and silver recycling in crystallography (X-ray) has caused a serious attention to the production of protease enzymes. Bacillus species are bee More
        the extensive usage of proteases in industries such as pharmacy, nutritious, weaving, paper production, curriery, detergent and silver recycling in crystallography (X-ray) has caused a serious attention to the production of protease enzymes. Bacillus species are been used as suitable microscopic organisms for the production of enzymes [1-2]. The design of experiments is a strong tool for improving the quality of products and eliminating the causes of quality losses, especially in the pre-production stages or in the provision of services. Today, there are new methods for performing the design of experiments. These methods have been enhanced by foresighting suitable models in comparing data collection, known as modern test design techniques [3]. The purpose of this review essay is to optimize the production protease enzyme by using the Taguchi statistical method and the effects of different sources of Carbon, Nitrogen, mineral elements, and creating different conditions such a pH, temperature, the duration of incubation and aeration in the production of protease [4]. Manuscript profile
      • Open Access Article

        2 - The Effect of Impulsivity Level on Performance Indicators of Beginner Volleyball Players
        Marjan Hamoun  Navard
        Impulsivity affects cognitive and behavioral aspects. Because in volleyball, the player must decide at the moment and implement its skill, and most of the outcome (outcome) of his performance is functional of his correct decision, his impulsive level can be importan More
        Impulsivity affects cognitive and behavioral aspects. Because in volleyball, the player must decide at the moment and implement its skill, and most of the outcome (outcome) of his performance is functional of his correct decision, his impulsive level can be important. The main purpose of this research was to compare the performance indicators of beginner volleyball players with different impulsivity levels based on Bart (2004). The statistical population of this study was volleyball player girls at Karaj clubs. Among these people were selected by about 300 people. The data gathering tool was Bart's impulsivity questionnaire (2004), Duda and Nicholls Sport Questionnaire (1992) and coach checklist, which measures the indicators of error number and risk of riskaceability. In order to test the hypotheses one- way multivariate analysis of variance (MANOVA) and at a significant level of 0.05 were used with SPSS software. According to the results of this study, there is a significant difference between the high, low and moderate levels in the risk level of players, the number of errors and the sports success of volleyball players. But there was no significant difference between high, low and moderate levels for technical performance of players (1 to 10 questions of instructor checklist including fitness, receiving, pass, defense, reaction time, game intelligence, etc.). In the sports variable, players with high impulsivity players had a significant difference with players with low and moderate impulsivity levels, but there was no significant difference between moderate and low levels in sport success. In variables of risk and number of errors, low impulsivity players had a significant difference with players with high and moderate impulsivity levels, but there was no significant difference between high and moderate levels in riskaceability and error number. Manuscript profile
      • Open Access Article

        3 - The Effect of Water Exercise on Pain and Disability in Patients with Non-Specific Chronic Back Pain and Its Relationship with Changes in Inflammatory Factors
        Mohammad-Ali Kohanpour Saeideh Najd Monireh khademi Sirous  Farsi
        the aim of this study was to investigate the effect of exercise in water on pain and the disability of patients with non-specific chronic back pain and its relationship with changes in inflammatory factors. The statistical sample of the research included 20 women su More
        the aim of this study was to investigate the effect of exercise in water on pain and the disability of patients with non-specific chronic back pain and its relationship with changes in inflammatory factors. The statistical sample of the research included 20 women suffering from non-specific chronic back pain purposefully selected and randomly assigned to three groups: exercise in water and control (10 people in each group). The exercise group participated in a course of 8-week program, while the control group received no intervention and had their normal routine activities. 48 hours before and 48 hours after the intervention, pain and disability and serum levels of CRP and TNF-α were measured. In order to examine and compare the changes of the variables, mixed analysis of variance was used. The results showed that pain and disability as well as serum levels of CRP and TNF-α in the training group were significantly reduced compared to the control group (P<0.05). Also, the results indicated that there was a positive significant relationship between all the variables (P<0.05). It seems that eight weeks of training in water leads to improvement of pain and disability in patients with non-specific chronic back pain. In the meantime, the reduction of inflammation caused by these exercises probably plays a role. However, we need more studies in this field. Manuscript profile