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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Food & Health
- نوع مقاله: Journal Article
- کلمات کلیدی: Pediatric,Food Security,Anthropometric indices,Hamedan city
- چکیده:
- چکیده انگلیسی: Food insecurity is one of the issues that have a serious impact on the nutritional status of all individuals in society, especially children and given that food insecurity can be a precursor of health, developmental and nutritional problems, determining the factors associated with it, is also essential in any community it seems. According to this, this study aimed to determine the relationship between food security, socioeconomic status and anthropometric indices in children 2-5 years in Hamedan city. In this analytical descriptive cross-sectional study, 683 children 2-5 years (360 boys, 323 girls) from Hamedan city and villages were selected by systematic cluster sampling methods from the Hamedan University of Medical sciences. HFLAS 9-item questionnaire to investigate food security, and also, a general questionnaire was completed through interviews with mothers of children. Also, children of anthropometric Z scores were measured by using the world health organization (WHO) Anthro software basal on WHO 2007 standards. Eventually, data were analyzed by SPSS software. According to this study, there was a significant correlation between the mother's and father's education and occupation, frequency of snack and food security with children's weight for age (p <0.05). Also, there was a significant correlation between the mother's and father's job, frequency of snack with children's weight for height (p <0.05). While BMI for age had a significant correlation with maternal education, (p <0.05). Also, height for age correlated with the mother’s education and occupation, father’s education, number of snacks and food security (p <0.05). Also, no significant difference was found between other components (p>0.05). The result of this study shown that there was a significant correlation between food security, Z score height for age, Z scores BMI for age, mother's and father's education, mother's job and socioeconomic status of the household.
- انتشار مقاله: 27-05-1398
- نویسندگان: Golnaz Majdizadeh,Zahra Vafaei Mastanabady,Zahra Zare,Mena Farazi,Zahra Mohammadizadeh,Ariyo Movahedi,Mina Minaie,Zahra Abdollahi,Ahmadreza Dorosty Motlagh,Maryam Zarei,Arezoo Kavei,Hassan Hamedi
- مشاهده
- جایگاه : پژوهشی
- مجله: Challenges in Nano and Micro Scale Science and Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Chitosan,Gelatin,Cardiac tissue engineering,Electrical Properties,Functionalized multi-walled carbon nanotube
- چکیده:
- چکیده انگلیسی: Abstract
This work introduces the novel gelatin/chitosan blend scaffolds containing different amounts of functionalized multi-walled carbon nanotubes (f-MWCNTs) up to 0.1wt%, which were prepared by freeze drying (freezing and lyophilization). The composite scaffolds were characterized by Fourier transformed infrared spectroscopy (FTIR) to distinguish the functional groups and different bonds in the structure of composite, and field-emission scanning electron microscope (FE−SEM) to evaluate the morphology of scaffolds. The scaffolds with the porosity of 89−93% and pore size of 40−200µm could be obtained by freezing at −20 °C and subsequent lyophilization. The porosity and swelling ratio of scaffolds were decreased, but the pore diameter was increased with an addition of f-MWCNTs. The electrical conductivity of incorporated scaffolds showed a significant increase with f-MWCNTs at an amount of 0.05wt%, and could achieve to those of the heart muscle. Compressive mechanical properties of the scaffolds revealed that the incorporation of f-MWCNTs led to significantly stiff the biopolymeric scaffold. The findings indicate that these novel fabricated composite scaffolds have microstructurally and electrically the potential to use in cardiac tissue engineering applications.- انتشار مقاله: 13-11-1395
- نویسندگان: Abdorreza Sheikh-Mehdi Mesgar,Zahra Mohammadi,Setareh Khosrovan
- مشاهده
- جایگاه : پژوهشی
- مجله: Physical Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Nanoparticles,Photocatalysis,ultrasonic irradiation,Cu-doped ZnS
- چکیده:
- چکیده انگلیسی: Ultrasonic-assisted method was applied for preparation of Cu+2-doped ZnS nanoparticles (mole fractions of Cu+2 ions are 0.000, 0.015, 0.030 and 0.060) in water as a template-free and green method at 30 min. The prepared nanoparticles were investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and UV–Vis diffuse reflectance spectra (DRS) techniques. In the prepared nanoparticles, Cu+2 ions are incorporated into the ZnS lattice. The nanoparticles have absorption edges at visible light region. The SEM images demonstrate that size of the nanoparticles decreases with Cu+2 content. To achieve maximum degradation efficiency, the influence of various operational parameters such as mole fraction of Cu+2 ions, ultrasonic irradiation time, catalyst weight, calcination temperature, concentration of methylene blue (MB) and pH of solution on the degradation rate constant was investigated under visible light irradiation and the results discussed. It was found that the degradation reaction followed pseudo first-order kinetics. The nanoparticles with 0.015 mole fraction of Cu+2 ions exhibit highest activity among the prepared samples.
- انتشار مقاله: 01-04-1392
- نویسندگان: Aziz Habibi-Yangjeh,Zahra Poormohammadi-Ahandani,Mahsa Pirhashemi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Teaching Language Skills
- نوع مقاله: Journal Article
- کلمات کلیدی: code-switching,Classroom Discourse,Bilingual context,High and low achievers
- چکیده:
- چکیده انگلیسی: In English as a Foreign Language (EFL) and bilingual language classrooms, code-switching is widespread among teacher-student and student-student interactions; however, there seem to be few or no studies tracking the perceptions and practices of EFL learners toward code-switching. Therefore, the aim of this study was to identify the perceptions and practices of high and low achievers toward teacher code-switching with focus on the possible limitations and benefits that it might have in language classrooms. For this purpose, the researchers used a qualitative design in the form of grounded theory. Accordingly, 11 high and 13 low achievers were interviewed individually and in focus groups. Further, the elicited responses were transcribed and codified using Straus and Corbin’s (1998) constant comparative method. In addition, for the purpose of validation, real observations of 10 university classes in different English courses were made. The findings revealed 4 major themes and 26 categories for high and low achievers. Consequently, the findings implicated that code-switching was an advantageous tool at the disposal of English teachers.
- انتشار مقاله: 17-03-1398
- نویسندگان: Zahra Mohammadi Salari,Fazlolah Samimi,Shahram Afraz
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Kerman University of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Premenstrual Syndrome,cognitive emotion regulation strategies,Traumatic experiences
- چکیده:
- چکیده انگلیسی: Background: The goal of the present study was to investigate the prediction of severity of premenstrual syndrome based on traumatic life experiences and adaptive and maladaptive emotion regulation strategies. Methods: this was a descriptive-correlational study. The participants included a total of 207 adolescent girls studying in the high schools of Shiraz selected through convenience sampling method. The Premenstrual Symptoms Screening Tool (PSST), the Cognitive Emotion Regulation Questionnaire (CERQ), and the Traumatic Experiences Checklist (TEC) were used to gather data. Means, standard deviations, Pearson correlation coefficient and regression analysis were used to analyze the data. Results: The results indicated a significant relationship between premenstrual syndrome and maladaptive cognitive emotion regulation strategies, so that catastrophizing predicted 37% of the variance of premenstrual syndrome. In addition, there was a significant relationship between premenstrual syndrome and traumatic events, so that threat to life/bizarre punishment/intense pain as a traumatic event, predicted 34% of the variance of premenstrual syndrome. However, no significant association was found between premenstrual syndrome and adaptive cognitive emotion regulation strategies. Conclusion: The results suggest that emotion regulation-based interventions and trainings can be useful in helping female students apply adaptive cognitive emotion regulation strategies in coping with premenstrual syndrome.
- انتشار مقاله: 29-10-1397
- نویسندگان: Zahra Mohammadi,Mobarakeh Ansari,Mozhgan Falahatdoost,Mahsa Rohani Anaraki
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Information Technology Management
- نوع مقاله: Journal Article
- کلمات کلیدی: Performance Evaluation,Decision support system,Multi-Criteria Decision Making Methods,Bank branches rating,Promethee II method
- چکیده:
- چکیده انگلیسی: The banks are the most important symbol of monetary market in any country without exception. As the optimum function of the banks have important role in economic development of the country, creating the ground for qualitative and quantitative promotion of the banks performance in healthy competition can play important role in achieving the goals. One of the methods helping the bank’s branches to identify the competitive position and performance quality is evaluation of their performance from various aspects and their ranking. The aim of present study is to design a decision support system based on Promethee II method as a complete and comprehensive method and by automatic ranking, despite considering the qualitative and quantitative indices, it is done in by low time and costs with high precision. Thus, it is possible to analyze the sensitivities to be sure of the initial selections and changing the indices and values dependent upon the environmental changes are provided for branches evaluators. The system output is the rank associated to each branch based on Promethee II method.
- انتشار مقاله: 27-02-1393
- نویسندگان: Ameneh Khadivar,Zahra Mohammadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Education Experiences
- نوع مقاله: Journal Article
- کلمات کلیدی: Performance,improvement,Staff,OJT- Based Model,IFMO
- چکیده:
- چکیده انگلیسی:
One of the traits of excellent organizations is to effectively use staff that present desirable performance and have engagement towards their organizations while trying to promote their knowledge, skill, and attitude and the other employees to solve issues and problems in working context. The aim of this research is to design an on-The- Job Training(OJT) Model and test it to promote and improve staff's performance among staff of Iran Forensic Medicine Organization (IFMO). This is a cross-sectional study which is done based on descriptive and analytical method. The study population is 2800 people working in IFMO in 2017 among which 338 persons were randomly selected based on Cochran's Formula using multi-stage clustering sampling among 15 selected provinces. Data was gathered via two researcher-structured questionnaires including OJT and performance improvement parameters. Face-related and constructive validity of the questionnaires were approved by elite and experts while using Cronbach's Alpha Coefficient showed an acceptable reliability, respectively 0.89 and 0.87. Some appropriate statistical indices were used to analyze the gathered data including frequency, Mean, SD, Pearson's Correlation Coefficient, and SEM. Findings show that there isa positive significant relationship between OJT's indices including need assessment, aims and priorities, content, planning and implementation, way of evaluation, executive management, facilities and equipment, technology and learners with PI's factors including job performance, individual performance, and organizational performance. Also, findings show that the best predictor is modern technology for PI regarding OJT-based model.- انتشار مقاله: 23-12-1396
- نویسندگان: Zahra Mohammadi,Hadi Rezghi Shirsavar,Mohammad Sadegh Ziaeiy,Shahram Hashemnia
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Dentistry, Shiraz University of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Bond strength,CAD-CAM,casting,metal-ceramic,milled sintered alloy
- چکیده:
- چکیده انگلیسی: Statement of the Problem: Success of metal-ceramic restorations depends on the bond strength between porcelain and alloy. These restorations can be fabricated through different casting and computer-aided design/compute-aided manufacturing (CAD-CAM) techniques.
Purpose: This study aimed to compare the bond strength of porcelain to milled sintered (Sintron) and casting (Co-Cr and Ni-Cr) base metal alloys.
Materials and Method: In this in-vitro experimental study, 63 rectangular bars (25×3×0.5 mm) were fabricated of three base metal alloys: casting Ni-Cr, casting Co-Cr, and milled sintered Co-Cr alloy. Feldspathic porcelain (3×8 mm) was applied at the center of each bar with 1.5 mm thickness. The specimens were thermally aged. Bond strength was evaluated through three-point flexural test. Failure mode was evaluated by optical and electron microscope. Data were analyzed with one-way ANOVA and Tukey's post hoc test (α=0.05).
Results: The mean flexural bond strength of porcelain to milled sintered Co-Cr alloy (24.58±5.16 MPa) was significantly higher than that of casting Ni-Cr (21.13±6.34 MPa) (p = 0.03) and casting Co-Cr (20.98±4.84 MPa) alloys (p = 0.04). However, the two casting alloys were not significantly different in this regard (p = 0.93). Failure mode in all specimens was of cohesive type.
Conclusion: Bond strength of CAD-CAM milled sintered Co-Cr alloy was better than that of the conventional casting alloys and can serve as a suitable alternative to those alloys.- انتشار مقاله: 24-09-1398
- نویسندگان: Zahra Mohammadi,Meysam Mahabadi,Gholamreza Tabbakhian,Mahmud Talaakoob
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Plant Physiology
- نوع مقاله: Journal Article
- کلمات کلیدی: Medicinal plant,Allelopathy,Phytotoxicity ,Photosynthetic pigment
- چکیده:
- چکیده انگلیسی: Allelopathic effects of plant residues is an important research avenue regarding optimization of rotation systems in agronomy. The aim of this study was to investigate the allelopathic effects of four plant residues, namely, black cumin, dragonhead, dill, and soybean on the germination and growth of wheat (Triticum aestivum) in different cropping systems. Results showed that application of organic manure for previous crops reduced the residue phytotoxicity and consequently alleviated the adverse effect of plant residues on the leaf area, length, and dry weight of the wheat root, affecting chlorophyll a, chlorophyll b, and carotenoids of wheat seedling leaves. In the presence of plant residue, the length and dry weight of the wheat roots were more negatively affected in comparison with shoots. The greatest allelopathic inhibition was observed for the wheat cultivated in the residue of black cumin, but soybean, dill, and dragonhead residues also potentially showed inhibition effects. It can be concluded that agroecosystems in which autumn wheat is in the rotation should be avoided where there are residues of soybean, black cumin, dragonhead, and dill. The tillage system in the same condition may not be agronomically suitable because of the allelopathic effects of previous crops.
- انتشار مقاله: 29-10-1398
- نویسندگان: Sian Fallah,Zahra Alimohammadi,Zohrab Adavi,Mojtaba Karimi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Pharmaceutical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Porosity,hydroxyapatite,Dissolution,Crystallinity,Plasma spray,Recrystallization
- چکیده:
- چکیده انگلیسی: The in vitro dissolution of plasma-sprayed hydroxyapatite (PHA) coatings with different characteristics, produced by various spraying conditions, in a Tris-buffered solution at pH 7.4 was experimentally studied through the measurement of calcium ions release with Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), and then modeled. Three coating characteristics, the crystallinity, the degree of recrystallization and the porosity were evaluated. The analytical modeling revealed that the calcium dissolution process was composed of two stages. The first stage was found to be both surface and diffusion controlled. The second stage was an exactly diffusion controlled dissolution. In the first stage, the solubility and dissolution rate of the PHA coatings were mainly increased with decreasing the crystallinity, and partly with increasing the degree of recrystallization and the porosity. The degree of recrystallization was found to control the dissolution rate of the PHA coatings in the second stage. It was suggested that the promotion of a rapid integration of implant to bone can be achieved by the optimization of the degree of crystallinity and recrystallization at coating surface.
- انتشار مقاله: 27-09-1386
- نویسندگان: Zahra Mohammadi,Aliakbar Ziaei-Moayyed,Abdorreza Sheikh Mehdi Mesgar,Mohammad Hossain Afdjei
- مشاهده