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Showing 8 results for rajabi
E Habibi, H Rajabi, H Dehghan,
Volume 22, Issue 2 (6-2014)
Abstract
Abstract:
Background: Visual fatigue could decrease precision and increase human error, hence declining productivity. Development of ergonomic laboratory instruments for diagnosing, evaluating, and monitoring visual fatigue could help productivity enhance in different occupations. This study aims to develop and validate laboratory instrument of visual fatigue (VFM-90.1).
Method & Materials: VFM-90.1 was designed and programmed based on registering changes in Flicker value. Then a cross sectional study was done to validate instrument, enrolling 248 users of video display terminals (VDT) and using visual fatigue questionnaire of VDT users. For measuring error of the instrument, an oscilloscope was use as the initial standard and for analyzing the data simultaneously gathered through the questionnaires and the instrument, spss11.5 was employed, subsequently, sensitivity-specificity values calculated and receiver operating characteristic (ROC) curve and areas of visual fatigue, obtained.
Finding: VFM-90.1 had resolution of 0.1 Hz and the average error of 0.8%. The maximum changes in flicker value and questionnaire score (prior to and after intervention) was calculated respectively as (-4.1) Hz and 5.83 (in 0-10 scale). The correlation between instrument results and the questionnaire was (-0.87) and cutoff points at (-0.5), (-2.2), and (-3.4) were defined as non, low, and moderate visual fatigue areas, respectively. The values less than (-3.4) were assigned to indicate severe visual fatigue area.
Conclusion: VFM-90.1 has scientifically adequate precision and authenticity and could be used as an initial standard instrument in ergonomic laboratories regarding easy application in scientific research and clear evaluation and interpretation of the data on visual fatigue obtained from this instrument. So, an effective measure could be taken to enhance ergonomic and occupational health.
Haniye Moallem Bandani, Majid Rajabian, Fardin Alimalayeri, Vahid Mohammadi, Donya Arefi, Somayeh Dahmardeh, Saeed Mohammadi, Ali Shahruzian,
Volume 23, Issue 3 (9-2015)
Abstract
Introduction: nowadays, cow's milk is one of the most important and commonly used animal milk consumed by human and it is a unique source of food for all ages. When the milk is contaminated with heavy metals such as lead and cadmium, it is considered a threat to human. Lead and Cadmium poisoning cause adverse effects on human, which is more common in childhood period. This study aimed to investigate the Lead and Cadmium level in caw milk in Zabol.
Material & methods: Randomly, 100 samples of milk were directly collected from the farms cows of the 5 Zabol's areas that tested to determine Lead and Cadmium residues by using Association of Analytical Communities (A.O.A.C) protocol. The heavy metals were determined by using a Rayleigh atomic absorption spectrome equipped with hollow cathode lamps (HCL) at 283.3 nm for Lead (Pb) and at 228.8 nm for cadmium. The Kolmogorov-Smirnov test. The results were analyzed by SPSS software.
Findings: It was indicated that the mean of lead level was 9.175± 2.581 ppb and for cadmium 4.557 ± 1.08 ppb in raw milk. P-values equal to 0.057(p<0.05) ppb for lead and was considered for cadmium was 0.435 (p<0.05) ppb. The standard levels for lead and cadmium were considered 1000 ppb and 10 ppb respectively Lead and cadmium contamination was less than standard in all milk samples. Discussion & Conclusion: The measuring of the samples showed that the Lead and Cadmium level were lower than the global standard, so all of the collected fresh milk was clean, pure and safe.
Ghafour Ghafari, Lotfali Bolboli, Ali Rajabi, Saber Saedmochshi,
Volume 23, Issue 7 (2-2016)
Abstract
Introduction: Cardiovascular diseases especially atherosclerosis, are the main causative of disability and death in all over the world and they have increasing spread in Iran. Homocysteine and fibrinogen are two new risk factors for prediction of atherosclerosis. Considering this, our aim in this study was to evaluate the effect of 8 weeks aerobic training on serum predictive inflammatory markers of atherosclerosis and lipid profile in obese elderly women.
Materials & methods: In a quasi-experimental study, 44 obese women (BMI≥30) 55 to 65 years old as volunteer, were selected and randomly divided into two groups of experiment (22 individuals) and control (22 individuals). Training program included aerobic exercise with 45 to 65 percent of maximum heart rate for 1 hour per session and 3session per week and continued for 8 weeks. Blood samples were collected after 12 hours fasting in the pre-test and 48 hours in the post-test to measure homocysteine, fibrinogen, high-sensitivity protein (CRP) and lipid profile.
Findings: Present study data shows that a significant decrease was observed in homocysteine (p=0.004), hs-CRP (p=0.009), cholesterol (p=0.037), triglyceride (p=0.017) and LDL-C (p=0.047) levels in experimental group; while there wasn't significant relation between study variability in control group. Also, a significant difference was observed in comparison between control and experimental groups about homocysteine (p=0.000), hs-CRP (p=0.037), cholesterol (p=0.049), triglyceride (p=0.000) and LDL-C (p=0.012). There was a significant relation between body fat percentage(r=0.87) and body mass index(r=0.68) with homocysteine.
Discussion & Conclusions: To sum up, by losing weight and body fat, homocysteine, CRP and also the increase of HDL study results showed that 8 week aerobic training can lead to reduction of cardiovascular risk factors and improving the health status in the elderly women.
Mehdi Jafari, Seyyed Meysam Mousavi, Mina Anjomshoa, Mohamad Ezati Asar, Ghasem Rajabi Vasokolaei, Jamil Sadeghifar,
Volume 25, Issue 2 (7-2017)
Abstract
Introduction: Equitable distribution of health care services is prerequisite of success to the national development programs. This study was conducted to assess the townships of Ilam province in terms of enjoyment of health care services.
Materials & methods: This cross-sectional study was carried out in Ilam province using 14 health care services indices. Data were collected by a data collection form made by the researcher using statistical yearbook of Statistical Center of Iran (SCI) in 2011. Ilam townships were assessed with 5 methods using Microsoft Excel 2010 (disharmonious index of Morris; standardized score; Scalogram; Numerical Taxonomy; TOPSIS) and given the different methods did not reach a general consensus, Copeland's method was used.
Findings: The findings indicated that there existed unequal distribution of health care services across the townships of Ilam province. According to the Copeland method, Ilam and Malekshahi townships have been ranked the first and last regarding the enjoyment of health care services, respectively.
Discussion & conclusions: As a result, health care services have been settled in the provincial center (Ilam Township). The policies leading to the development of health care services in large cities are the major important factors in the unequal distribution of health care services. The results of this study can provide illustration of current situation of enjoyment of the health care services and promote the evidence-informed decision making (in national and local levels) for policymakers.
Miss. Mahin Kokhazadeh, Mr. Hossein Rajabi, Ms. Samira Rasaneh, Mr. Mohammad Ali Askari, Miss. Parisa Taheri,
Volume 25, Issue 6 (3-2018)
Abstract
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Introduction: One of the most common applications of medical isotopes is in treatment of cancer and hyperthyroidism using Iodine-131. The Iodine-131 cumulates in cancerous cells and acts as a source of radioactive emissions. Apparently, local and temporal distributions of the radioactive material are different in various organs. In this paper, the effect of radioactive Iodine distribution on the amount of exposure at different distances has been investigated.
Materials & Methods: This analysis has been carried out using adult NCAT phantoms, Monte-Carlo simulation, and GATE code. By applying the same amount of activity on five different organs of the phantom, the quality and quantity of energy has been computed as well as the amount of emitted exposures at distances of one, two, and three meters. Then, by setting thyroid as the basis, the difference of exposure emitted from other four organs has been calculated and analyzed using KS test.
Findings: Simulation results had been showed that the amounts of exposure that emitted from aforementioned organs are significantly different at the distance of one meter whereas this difference diminishes significantly at distances of two and three meters. In other words, the effect of radioactive Iodine integration location on the emitted exposure is being trivial as the distance increases.
Discussion & Conclusions: Distinct TEDE values must be defined for each of the aforementioned organs and confirmed before releasing patients who will be faced to the others at short distances. Otherwise, guidelines must be considered for the others who will be faced to the released patient.
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Mehrzad Hamidi, Majid Jalalifarahani, Hossein Rajabi, Forozan Yousefjamal,
Volume 26, Issue 1 (5-2018)
Abstract
Introduction: Internet addiction disorder (IAD) is a socio-psychological disorder which includes a habitual dependence to the Internet and its compulsive and obsessive misuse. This research intends to clarify the association of various types of social skills, self-efficacies, lifestyles, with IAD among high school sport students.
Materials & methods: Considering the goal, this research was a practical. The samples covered 129 high school sport students of secondary school at their second term of the school year 2016-17 in Ilam ( southern Iran), selected through multistage stratified sampling. Data was gained using the following scales: General Self-Efficacy Scale (GSE), Teenage Inventory of Social Skills (TISS), Lifestyle Questionnaire (LSQ), and Internet Addiction Test (IAT). Data analysis was carried out using SPSS 19 and smart PLS3 applications, respectively.
Findings: According to the results, the secondary school sport students’ social skills score at Ilam province was 126.98, GSE 63.51, LSQ 273.51, and IAT 45.88. At. Life style, up to a certainty of 90%, proved to moderate the association between such students’ GSE and their IAT.
Discussion & conclusions: Based on the results of the current study, lifestyle acted as a moderator in the association of secondary school students’ self-efficacy with internet addiction. it seems necessary to interfere and make effective interventions to improve the students’ lifestyle and strengthen their self-efficacies to prevent internet addiction among them.
Babak Farzad, Nabi Shamsaei, Hamid Rajabi, Reza Gharakhanlou, Seyed Behnamedin Jameie,
Volume 26, Issue 4 (11-2018)
Abstract
Introduction: Irisin is a myokine that is suggested to be a link between skeletal muscles and other tissues. Simultaneous presence of irisin and glutamate decarboxylase enzyme in purkinje cells of cerebellum led us to examine the potential role of irisin. As glutamate decarboxylase enzyme is responsible for converting glutamate excitatory neurotransmitter to GABA inhibitory neurotransmitters.
Materials & Methods: Forty male Wistar rats (weight: 180±20 g) were assigned to five groups as follows: 1) CCI neuropathic pain with swimming training (CCIST); 2) CCI neuropathic pain without swimming training (CCI); 3) No CCI neuropathic pain with swimming training (ST); No CCI neuropathic pain without swimming training (Control); 5) CCI sham surgery (Sham). CCI and CCIST groups underwent peripheral nerve injury by four loose ligatures on the sciatic nerve. The swimming training program included two weeks of swimming (5 sessions per week, 30-60 min per session). The protein expression of irisin in L4-L6 regions was evaluated by western blotting technique.
Findings: Irisin expression in the CCIST2 (P=0.039) and ST2 (P=0.016) groups was lower than in the CCI group. However, there was no significant difference between two training groups.
Discussion & Conclusions: If we assume a similar role for irisin in the nervous system as in adipose tissue, the lower level of irisin in the two training groups can be justified as it is less needed to reduce ATP production as an excitatory neurotransmitter in the spine.a
Mohammad Shekarzadeh, Abas Mohammad Poor, Mehdi Abasi Roshan, Mehran Rajabi Sahneh Saraie, Mostafa Daryaie,
Volume 26, Issue 6 (3-2019)
Abstract
Introduction: Type 2 diabetes mellitus is a complex heterogeneous group of metabolic conditions characterized by increased levels of blood glucose due to impairment in insulin action and/or insulin secretion. The TCF7L2 gene is considered as one of the major genes susceptible to diabetes.The single nucleotide polymorphism rs7903146 is located in intron 3 of this gene, which is significantly effective in type 2 diabetes.
Materials and methods: In this case-control study, 141 patients and 86 healthy subjects were present. 5cc peripheral blood of diabetics was collected in EDTA-containing tubes. Genomic DNA was extracted using salting-out method and polymorphism genotype was investigated using PCR-RFLP method.
Findings: Genotype and allele frequencies of the rs7903146 polymorphism differed significantly between type 2 diabetic patients and non-diabetic subjects (P = 0.0468 and P = 0.0474 , respectively). The frequency of T allele was 54.5% in type 2 diabetes group and 39.5% in non-diabetic subjects, and this allele was significantly associated with type 2 diabetes risk (OR = 1.8333, 95% CI 1.0456 – 3.2144).
Discussion & Conclusion: Our results confirmed the association between the rs7903146 polymorphism of the TCF7L2 gene and the increased risk of type 2 diabetes in the west-Mazandaran, Iran.
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