List of Articles Oxygen Consumption

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  1 - An Investigation on the Efficiency of SBR In Different Operation Conditions
  Afshin Takdastan Naser Mehrdadi Ali Torabian
  Many industrial & semi industrial countries manage to use SBR in order to industrial & municipal wastewater treatment. Simplicity, flexibility & being economical of this technical biological treatment, lead it to its significance in utilizing for treating of More

  Many industrial & semi industrial countries manage to use SBR in order to industrial & municipal wastewater treatment. Simplicity, flexibility & being economical of this technical biological treatment, lead it to its significance in utilizing for treating of industrial & municipal wastewater. To study this procedure, two units of SBR reactors cylinder made of poly glass with 20 liter volume are used. For seeding the reactors, artificial wastewater with COD of 600 mg/l & BOD of 600 mg/l is used. Reactors with different solid retention time (SRT) (5, 10, 15, 20 & 25 days) are operated. After providing the steady state in the reactors, during 8 months research, sampling and testing parameters such as COD, BOD, MLSS, MLVSS, MLNVSS, pH, DO, SVI, SOUR & F/M were done. The results show that SRT (5, 10, 15, 20 & 25 days) for 10 days duration is the best results for COD removal efficiency without existence of any bulking, pin point flocks and also foaming & dispersed growth difficulties. In this SRT duration, the amount of SVI has been up to 90 mg/l. This SRT system has been used in growth phase and the amount of F/M is 0.25. In the SRT less than 5 days, inorganic material removal & sludge volume index efficiency (SVI=215 mg/l) due to voluminous foaming generation & also fine coagulation generation resulted from lowness MLSS and dispersed growth occurrence respectively was low and it which shows that the system was operated in log growth phase & the amount of F/M has been1.8. Also in the SRT more than 25 days filamentous bulking phenomenon was aggravated and system efficiency due to bad sludge settle ability (SVI=215 mg/l) was low & because of over growth of filamentous bacteria, sludge can not be settled easily. With the increasing of SRT (more than 20 days), due to entrancing to declining phase and increase of inactive & old bacteria, the rate of oxygen consumption & SOUR reached to 7(mgo2/hr/grVSS), however in a low SRT (5 days), due to entrancing log growth phase & increase of active & young bacteria, the rate of oxygen consumption increased & SOUR reached up to 22 (mgo2/hr/grVSS). Manuscript profile
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  2 - Recycling Evaluation of Mill Scale in Electric Arc Furnace
  Saeid Saberifar Fatemeh Jafari Hossein Kardi Mohammad Ali Jafarzadeh Seyyed Ali Mousavi
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  3 - The effect of UCP1 and PPARα genotypes on endurance performance and body composition of obese women after eight weeks of endurance training
  Maryam Kamari Masoud Rahmati Mehdi Boostani
  Introduction: Considering the role of UCP1 and PPARα in fat metabolism, the aim of this study was to investigate the effect of UCP1 and PPARα genotypes on endurance performance and body composition of obese women after an endurance training program.Materials More

  Introduction: Considering the role of UCP1 and PPARα in fat metabolism, the aim of this study was to investigate the effect of UCP1 and PPARα genotypes on endurance performance and body composition of obese women after an endurance training program.Materials and Methods: 23 obese women (30-45 years old, BMI=30) voluntarily participated in the research. Subjects participated in an endurance training program (8 weeks, 5 sessions per week and 30 minutes in each session, by intensity of 55-75% of heart rate reserve). The subjects' height, weight, BMI, body fat percentage, waist-to-hip ratio, and VO2max were evaluated before and after the training program. In order to extract DNA and observe the genetic profile by RFLP method, saliva samples were collected. Subjects were placed in CG and GG groups for PPARα gene and CC and CT groups for UCP1 gene. The frequency of genotypes was checked with chi-square test and the difference between variables was checked with independent t-test.Results: The results of UCP1 gene in CC and CT genotype groups showed that there is no significant difference between pre to post test of VO2max (p=0.823), BMI (p=0.683), fat percentage (p=0.275), waist-to-hip ratio (p=0.113). Also, the results of PPARα gene in CG and GG genotype groups showed that there is no significant difference between pre to post test of VO2max (p=0.739), BMI (p=0.24), fat percentage (p=0.493) and waist-to-hip ratio (p=0.447).Conclusion: UCP1 and PPARα genotypes have no effect on endurance performance and body composition of obese women after an endurance training program. Manuscript profile
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  4 - Comparison of oxygen consumption of three freshwater amphipods, Gammarus loeffleri, G. crinicaudatus, and G. zagrosensis in different salinities
  Z. Zohari M. Zamanpoore A. Vahdati
  Respiration and oxygen consumption in aquatic invertebrates including Gammarus (Crustacea: Amphipoda) are affected by osmotic pressure and salinity. This effect was investigated in three species from ecologically different springs in Fars Province. Oxygen consumption wa More

  Respiration and oxygen consumption in aquatic invertebrates including Gammarus (Crustacea: Amphipoda) are affected by osmotic pressure and salinity. This effect was investigated in three species from ecologically different springs in Fars Province. Oxygen consumption was measured for 1 hour period in various salinities (2 - 10 ppt) using a dissolved oxygen probe. Results showed significant differences in oxygen consumption in salinities 4 - 10 ppt. Oxygen consumption in all three species increased from salinity 2 - 6 ppt, and decreased with increasing salinity to 8 - 10 ppt. It was also significantly higher in salinities of 6 - 8 ppt in G. crinicaudatus, compared to other species. Regarding salinity differences in the environments of these species, it can be said that G. crinicaudatus has more tolerance and adaptability to salinity increase compared to the other two species. The higher oxygen consumption suggests that 6 ppt salinity was critical for all the three species. These three species have probably derived from a common ancestor diverging in time after geographical isolation of its descendant populations. The difference in their physiological responses could be a reflection of adaptation pressures, particularly osmotic conditions of their environments. Manuscript profile
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  5 - The effect of concurrent aerobic resistance exercise on thyroid hormones, body composition, and maximum oxygen consumption of sedentary overweight and obese women with hypothyroidism
  fatemeh loghmani Khartomi mohadeseh dadmanesh Anahita  Shabani
  Introduction: The aim of this study was to investigate the effect of simultaneous resistance aerobic training on selected indicators of body composition, maximal oxygen consumption and thyroid hormones in sedentary overweight and obese women with hypothyroidism. Materi More

  Introduction: The aim of this study was to investigate the effect of simultaneous resistance aerobic training on selected indicators of body composition, maximal oxygen consumption and thyroid hormones in sedentary overweight and obese women with hypothyroidism. Material & Methods: In this semi-experimental study, 24 women with hypothyroidism were randomly divided into two control groups (number = 12 people; body mass index: 31.33±3.62 kg/m2) and experimental (number= 12 people; body mass index: 32.33 ± 4.05 kg/m2) were divided. The experimental group did 8 weeks of simultaneous aerobic-resistance training. Each session consisted of 30 minutes of aerobic training (80-55% of maximum heart rate) and 30 minutes of resistance training. Before and after the 8-week training period, body composition measurements (weight, body mass index, waist-to-hip ratio, and fat percentage), maximum oxygen consumption (Rockport 1609-meter walking test) and blood hormone measurements (TSH and T4) to It was done. Statistical information was measured by SPSS software version 26 and the statistical level α<0.05 was considered. Results: Compared to the pre-test in the experimental group, there was a significant decrease in the variable of weight (p=0.01), body mass index (p=0.008), body fat percentage (p=0.002), TSH (p=0.005) and a significant increase in maximum oxygen consumption (p=0.002), T4 (p=0.01) was seen, but no significant difference was observed in the variable of waist circumference to hip circumference. In the inter-group comparison, there was no significant difference in all the variables in the pre-test, and in the post-test comparison, there was a significant decrease in the experimental group compared to the control group, but there was no change in the waist-to-hip ratio variable. Conclusions: These findings show that resistance aerobic exercise has an effect on selected indicators of body composition, maximal oxygen consumption, and thyroid hormones in sedentary, overweight and obese women with hypothyroidism. Manuscript profile
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  6 - The effect of eight weeks of endurance training with garlic supplementation on aerobic capacity and lactic acid in middle-aged non-professional female athletes
  farhad safari zanjani Leila tavasolian ghomashchi
  Long-term endurance training improves aerobic capacity and lactic acid indicators during rest and sports activity. Increasing aerobic capacity and reducing lactic acid by consuming garlic can enhance these beneficial effects and therefore can increase endurance performa More

  Long-term endurance training improves aerobic capacity and lactic acid indicators during rest and sports activity. Increasing aerobic capacity and reducing lactic acid by consuming garlic can enhance these beneficial effects and therefore can increase endurance performance. Therefore, this study was conducted with the aim of investigating the effect of 8 weeks of endurance training with garlic supplementation on aerobic capacity and lactic acid in non-professional middle-aged female athletes in zanjan city. Healthy non-athlete women were randomly divided into four groups [garlic supplement (with an average age of 52.33), exercise (53.60), garlic and exercise supplement (53.93) and a control (with an average age of 63.53)]. After Bruce's test (pre-test), a garlic supplement group, a training group (only training) and a garlic supplement and training group (garlic plus training) were given, and the control group did not perform any specific activity. The subjects, at the end of the eighth week, were again Bruce's test was performed to analyze the data, independent t-test and covariance analysis were used, and the significance level was 0.05 in all tests. The results showed that there was a significant difference between the consumption of garlic supplement, exercise, garlic with exercise in increasing aerobic capacity and reducing lactic acid. Also, after 8 weeks, garlic supplementation caused a significant difference in maximum oxygen consumption compared to the control group. The findings of the present study show that consuming garlic during exercise has a significant effect on increasing aerobic capacity and reducing lactic acid in non-athletic women. Manuscript profile