elham saeedi

 Hypomagnesaemia secondary to the use of proton-pump inhibitor (PPI) is associated with the reduction of blood pressure.

 To determine the effect of PPI and ranitidine on the reduction of serum magnesium level and blood pressure in chronic hemodialysis patients with hypotension.

 In this double-blind randomized clinical trial, 44 hemodialysis patients who met the requirements entered the study. First, blood sample was taken from each of the patients and their serum magnesium level as well as their blood pressure was checked and recorded. Then, the patients in the intervention group received daily doses of ranitidine placebo (150 mg) and pantoprazole (40 mg) and those in the control group received daily doses of pantoprazole placebo (40 mg) and ranitidine (150 mg) for three months. After the intervention, blood samples were taken again in order to assess the patients’ serum magnesium level. The obtained data were fed into SPSS Software and analyzed.

 The mean age of the patients was 60.14±12.98 years. Moreover, 63.6% of the total patients were female. In the group of patients who had received pantoprazole, diastolic pressure reduced significantly at the end of the study as compared to the beginning of the study. Moreover, in the patients receiving pantoprazole indicated a significant reduction of magnesium at the end of the study as compared to the beginning of the study.

 In this study, a significant relationship was also observed between the use of PPI and hypomagnesemia in hemodialysis patients.
Trial registration: The trial protocol was approved in the Iranian Registry of Clinical Trials (identifier: IRCT20150808023559N19; https://en.irct.ir/trial/42478, ethical code# IR.ARUMS. REC.1398.295).

Sport is currently one of the most attractive markets in the field of investment. Iran's sports sector in general and Alborz province in particular are supported by government resources, and these government resources are dependent on various crises in the country such as currency market fluctuations and other unpredictable crises such as the corona virus.Therefore it is more important to pay attention to the issue of investing in sports in Alborz province for the development of the health sector, championship sports and professional sports of this province.With this description, this research was conducted with the aim of identifying the investment opportunities of the private sector in sports in Alborz province.The reason for choosing the topic of investing in sports is that, as Andreff & Andreff (2009) pointed out, investing in sports has been neglected. Also, only two foreign researches (Farouk, 2016) and two domestic researches (Jaffrey & Hemtinejad, 2021) were found in identifying private sector investment opportunities in sports. But none of them have focused on identifying investment opportunities in Iran's sports in general and Alborz province in particular. The present research method was qualitative in terms of practical results, exploratory purpose and in terms of the type of data.In this research, the statistical population of the current research is the previous and current heads of the General Directorate of Sports and Youth in Alborz province during the last five years, the previous and current deputy heads of the General Directorate of Sports and Youth in Alborz province during the last five years, the previous and current heads of sports departments andthe youth of the cities of Alborz province during the last five years, sports management professors of Alborz province who are aware of the issue of investing in sports, Knowledge-based sports companies, start-ups and sports equipment manufacturing companies in Alborz province.In order to collect information in this research, first, the investment opportunities of the private sector in sports in Alborz province were collected. Due to the lack of information in this area, semi-structured interviews were used. The interview time varied from 30 minutes to one hour and 45 minutes.In the interview process, the questions were asked in an order in which they have a logical system.Also, in the process of the interviews, considering that the interviewees did not allow the audio recording of the interview, the researcher used the method of note-taking and noted down and recorded the concepts and themes of the interviewees.The data analysis method in this part was based on thematic analysis method.Also, a PhD in sports management was requested to participate in the research as a research associate (coder) and help in reviewing the codings.At the end of this stage, after the necessary corrections, questionnaire items were prepared to use fuzzy Delphi to agree on the number of items. The descriptive findings of the research show that 5.6% of the people in the research sample are women and 94.4% are men. 5.6% of the statistical sample is in the age group of 30 years and under, 22.2% in the age group of 31 to 40 years, 55.5% in the age group of 41 to 50 years, and 16.7% in the age group of 51 years and older. 5.6% of participants' educational qualifications were diploma and sub-diploma, 16.7% bachelor's degree and 77.7% master's degree and above. The findings of the present research identify and rank seven opportunities for sports goods manufacturing companies, sports medicine, sports knowledge-based companies, sports start-ups, sports supplement manufacturing companies, sports venues and sports tourism. It led to investment in sports in Alborz province. These findings are consistency with the results of Farouk (2019), Noble (2019), Khatat Nejad (2016), Farouk (2019), Jæger (2019), Martín-González et al (2021),Campbell (2011), Mayol (2012), Alonso & Fernandez-Garcıa (2020), Deloitte (2017), Ratten & Thompson (2020) and Lakshmi & Narisetti (2020) . Based on the result, the highest average rank is related to the component of sports goods manufacturing companies and the lowest rank is related to the component of sports tourism. Considering the large area of Alborz province and its proximity to the capital and the high demand for the export of sports equipment to the whole country and abroad, it has led to the greatest desire to invest in sports goods manufacturing companies. While the dispersion and insufficient financial efficiency of sports tourism in Alborz province has led to the least willingness to invest in this sector.The findings of the present research identify and rank seven opportunities for companies producing sports goods, sports medicine, knowledge-based sports companies, sports start-ups, companies producing sports supplements, sports venues and sports tourism. It led to investment in sports in Alborz province. These findings are in agreement with the results of Nobel (2019) in the component of sports facilities; with the results of Martin Gonzalez, Surratt and Luke Gill (2021) in the sports tourism component; with the results of Campbell (2011) in the component of sports goods manufacturing companies; with the results of Alonso and Fernandez-Garcia (2020) in the component of sports supplement manufacturing companies; It is consistent with the results of Rotten and Thompson (2020) in the sports start-up component and with the results of Lakshimi and Naristi (2020) in sports medicine. On the other hand, it is inconsistent with some of the results of Farogh (2019) that there are other investment opportunities such as sports events, sports marketing, launching sports channels, sports financial support in the field of sports. In the end, by identifying seven factors and 71 indicators for the investment opportunities of the private sector in the sports of Alborz province, it can be said that there are various opportunities for investing in the sports of Alborz province, and attention can be paid to each of them for revenue from sports investors.

The purpose of this study was present the mental model, identifying and ranking the mental model components of the sports companies managers in manufacturing sector of Iranian sports industry, using fuzzy Delphi technique. The present study is a combination (qualitative and quantitative), descriptive-analytic, and time-based research, which is applied in terms of purpose and is a field research, in terms of data collection. The statistical population of the study includes the managers of companies producing Iranian sports equipment, according to statistics announced through the official website of the Ministry of Industry, Mines and Trade of the country, 255 people (236 men and 19 women). The statistical sample was selected purposefully in the qualitative part and in the quantitative part by the total number method. In the qualitative part, fuzzy Delphi method was used and in the quantitative part, exploratory factor analysis and structural equations were used. Findings showed that the components of mental ability, mental involvement, mental history and psychological characteristics have an explanatory role in shaping the mental model of managers. Other findings showed that the highest rank is related to mental ability and the lowest rank is related to mental conflict. Therefore, managers can use their mental ability to solve the company's problems.

 Moral distress is one of the important issues in the field of medical ethics that can have different effects on nurses, patients and health systems. One of the important effects of this phenomenon is professional stress in nurses. The aim of this study was to determine the relationship between moral distress and occupational stress of nurses in Tehran University of Medical Sciences in the care of Covid 19 patients.

 This descriptive-analytical study was performed on a sample size of 265 nurses working in the ward 19 in the hospitals of Tehran University of Medical Sciences in 2021. Sampling was done by stratified and simple random method. Data were collected using a demographic questionnaire, Corelli Moral Distress, and Wolfgang Occupational Stress. Then they were analyzed by SPSS software version 16 using descriptive (percentage, frequency, mean, standard deviation) and inferential (Pearson correlation coefficient) statistical tests.

Ethical Considerations: 

In this study, criteria concerned with moral principles as confidentiality,  personal satisfaction and freedom of participants in cooperation or non –cooperation during the study  process have been observed.

 The results showed that moral distress with a mean standard deviation of 99.52±  26.32 was at a low to moderate level. Also, the mean and standard deviation of occupational stress was 80.32±10.40. There was a statistically significant relationship between moral distress and nurses' professional stress (p <0.001).
 

 Caring for Covid 19 patients increases nurses 'stress, which has a positive effect on nurses' moral distress. Therefore, it is suggested that due to the existing conditions, necessary measures should be taken to reduce stressors.

The aim of this study was to identify the cognitive function of Payame Noor University students about Covid 19 virus using fuzzy Delphi technique. The present study is a qualitative research, based on the present time, in terms of applied purpose, and in terms of collecting field information. The statistical population consisted of master and bachelor students of Payame Noor University of Alborz province. Non-random sampling method was selected. Data were also collected through in-depth and semi-structured interviews, and fuzzy Delphi technique was used to reach a possible agreement between experts to eliminate possible biases. Findings showed that the components of political cognition, economic cognition, cultural and social cognition, behavioral cognition and belief cognition had an explanatory role in shaping students' cognitive performance. Thus, students can solve the problems about the Covid virus 19 by identifying cognitive function. Also, other research findings showed that the highest rank is related to behavioral cognition and the lowest rank is related to political cognition. Thus, in cognitive performance, students gained more behavioral cognition, and their least cognition was political cognition.

In business, many manufacturers are struggling to produce their own products. According to this issue, the purpose of this study is the effect of mental model on open innovation in the production sector of Iran's sports industry with the mediating role of talent management. The research method is descriptive-analytical, based on present time, in terms of practical purpose, and in terms of field In the field of trade, many manufacturers try to produce their products. According to this issue, the purpose of this study is to determine the effect of mental model on open innovation in the production sector of Iran's sports industry with the mediating role of talent management. The research method is correlation in the form of structural equations, based on the present tense, in terms of applied purpose, and in terms of collecting field information. The statistical population includes the managers of Iranian sports equipment manufacturers, according to the statistics announced through the official website of the Ministry of Industry, Mines and Trade of the country: 255 people (236 men and 19 women).The statistical sample was selected by total method. The measuring instruments were used from three questionnaires of Saeedi Mental Model (2020), Philips and Roper Talent Management (2009) and Open Innovation of Rangus and Drnovšek (2013). The results of structural equations showed that the mental model affects open innovation in the manufacturing sector of Iran's sports industry with the mediating role of talent management. So managers use open mindedness and talent management to achieve open innovation. Therefore, it is suggested that managers of sports companies in the production of sports products to be able to make optimal use of talent management for their employees, in order to achieve open innovation with the help of a suitable and capable mental model.

This research aimed to predict the relationship between emotional intelligence and anger rumination with aggression

The research was a correlation method. The population was all students of Tabriz University and 377 students were selected by multistage cluster sampling. They answered questionnaires of Bar-on emotional intelligence questionnaire (1997), Bass and Perry aggression questionnaire (1992), and Sukhodolsky et al. anger rumination questionnaire (2001). The data were analyzed by multiple regression.

Data analysis showed that emotional intelligence and anger rumination were able to significantly predict aggression changes, while emotional intelligence negatively and anger rumination had a positive role in explaining aggression. Beta coefficients indicated that emotional intelligence with the highest value (-0.64) had a greater role in explaining aggression

Based on the findings, it can be deduced that aggression is influenced by cognitive and emotion management and control factors and it is necessary to emphasize cognitive and emotional skills.

Sedimentation by gravity is a common, highly applicable separation method for the suspended solid particles of water and wastewater. Sedimentation basin is an important component of every water treatment process. Due to high maintenance costs of these basins, up to about 30% of all costs in a water treatment plant, optimum performance of settling basin is very significant. In order to improve the efficiency of the basin, engineers have proposed various methods, among which, “changing the geometry along with installation of baffle in the basin” is economic and has attracted the attention of researchers. In the present paper, numerical simulation was made by using Flow3D software and RNG k-ε turbulence model for a flow consisting of settlement particles in the rectangular settlement basin by a finite volume method (FVM). This study aims at numerical simulation of the hydraulic flow in settling basins with various baffle configurations, and finally, obtaining the best geometry for the baffle. Considering the relative consistency of the numerical model results and the experimental data, the numerical simulation results were validated using the Flow3D model. The results showed that the flow in the settling basin is severely affected by the baffle. According to the studied models, it is clear that the baffles installed with lower height and closer to the basin inlet and baffles with high height and far away from the basin inlet have the most effective case on the settlement efficiency.

Giardia lamblia is a protozoan parasite with universal distribution in human populations. This infections transfer to human via contaminated foods and waters with Giardia cysts. The Knowledge on the incidence of this agent in the potential infection sources can provide valuable information for control and the spread of this parasite to human communities. This study was aimed to isolate and identify the Giardia lamblia cysts in the surface waters of Rasht city, Guilan province, north of Iran with microscopy and PCR assay.
This cross-sectional study was performed on 45 samples of surface waters collected from rivers and wetlands in the vicinity of Rasht city. The samples were concentrated using nitrocellulose membrane filters, and the sediments were examined for Giardia cysts by microscopy with a magnification of 1000 X. Also, DNA was extracted from the sediments, and the heat shock protein gene of G. lamblia was amplified. From 45 samples, 33.33% and 40% were positive by microscopy and PCR, respectively.
In comparison with the standard microscopic method, PCR showed more sensitivity for detection of G. lamblia cysts in water samples

One of the climate change sign is variation in greenhouse gases in the Earth's atmosphere. Carbon dioxide is the most important greenhouse gas that is released into the atmosphere by humans. It is expected that addition of carbon dioxide could effect the energy balance and global climate. Climate change is effective on agricultural productions. It is clear that different plants have different responses to Co2 variation. These responses are consisting of yield, growth characteristic and variation in root/shoot ratio of plants. On the other hand, using growing media are expanding for plants because of their advantages such as plants nutrient control, reducing the incidence of diseases and pests and increasing the quantity and quality rather than soil cultivation. Properties of various materials as substrates influence directly or indirectly on plant growth and crop production., Hydroponic method can be considered as one of the important methods to optimize water use in agriculture, especially in many countries are located in arid and semi-arid regions that have water crisis. Lisianthus is one of the most beautiful flowers with folded petals in white, blue and purple. I-ts scientific name is Eustoma grandiflorum from the family of Gentianaceae and native to North America. It has variety of annual, biennial or short-lived perennial. The aim of this study was to explore the effect of Co2 enrichment on growth response of aboveground and belowground of Eustoma grandiflorum under increasing of Co2 greenhouse gases in hydroponic culture. The experiment was done as a split-plot based on completely randomized experimental design with three replications at greenhouse of Ferdowsi University of Mashhad. The treatments were consists of three concentrations of carbon dioxide (380 as controls, 750 and 1050 ppm) as main plots and two cultivars Yodel white and GCREC-blue as subplots. Some characteristic such as plant height, internode length, root volume, root area, root and shoot dry weight were measured. Data were analyzed by JMP software Version 8 using analysis of variance (ANOVA) and significant differences between means were determined by using LSD test at P The results of analysis of variance indicated that the effect of Co2 treatment was significant (p