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Showing 2 results for Zahedifar
Volume 7, Issue 3 (Summer 2019)
Abstract
Aims: One of the most important factors in public health is oral and dental health. Determining the level of knowledge and attitude and the applicable criteria are effective factors in reducing dental problems. This study was conducted to determine the effective factors on oral hygiene based on the Health Belief Model (HBM) in students of Paramedicine, Qazvin University of Medical Sciences.
Materials & Methods: This is a descriptive-analytical. The present study was conducted on 300 students that were selected by using a multi-stage random sampling method. The data collection tool was based on a standard questionnaire of health belief model. The obtained data were analyzed by SPSS 20 software, descriptive statistics, and Pearson coefficient tests, variance analysis, Turkey test, and linear regression logistic regression was taken as a significant level of 0.05.
Findings: The mean of health behaviors among students was moderate (52.38±5.95). The regression analysis showed that constructs perceived barriers, self-efficacy and perceived benefits predict tooth decay prevention behaviors (p≤0.05). Pearson's test showed a positive and significant relationship between perceived barriers and behavior (r=-0.471, p=0.00).
Conclusion: In order to promote health behaviors among the student’s perceived barrier self-efficacy and perceived benefits, as the most important predictors of student behavior for holding educational courses should be used.
M. Zahedifar, N. Karimi, H. Fazaeli, S. A. Mirhadi,
Volume 16, Issue 4 (7-2014)
Abstract
The aim of this study was to investigate the effect of steam treatment on nutritive value of date (Phoenix dactylifera) leaves. Date leaves were chopped and mixed with water or sulfuric acid solution to contain 50% moisture with or without 1% sulfuric acid. Steam treatment of the date leaves was carried out using three levels of steam pressure (14, 17 and 20 bar), three reaction times (120, 180, and 240 seconds) and two levels of acid (0 and 1 percent). The treated samples were analyzed for chemical composition including: cell wall components, ash, total extractable phenolics, water soluble sugars, and reducing sugars. Dry matter loss (DML), enzymic hydrolysis, and in vitro gas production of the samples were also measured. Results showed that steam treatment significantly affected (P< 0.05) cell wall components. An increasing trend was observed in DML by increasing harshness of treatment conditions. The lowest DML (12.7 g kg-1) was observed in the auto-hydrolyzed (steam treatment without addition of exogenous acid) sample treated at 14 bar pressure and 120 seconds reaction time and the highest DML (78.8 g kg-1) was observed in the acid-hydrolyzed (addition of 10 g kg-1acid prior to treatment) samples treated at 20 bar pressure and 180 and 240 seconds reaction times. Steam treatment significantly (P< 0.05) decreased neutral detergent fiber (NDF) content but increased acid detergent lignin (ADL). Maximum changes in hemicellulose and water soluble sugars were observed in acid-hydrolyzed samples, in which hemicellulose decreased from 264.6 g kg-1 in control to 72.2 g kg-1 in the sample treated at 20 bar and 240 seconds and water soluble sugars increased from 14.0 g kg-1 in the control to 101.8 g kg-1 in the sample treated at 17 bar and 240 seconds. Enzymic hydrolysis of date leaves was improved after steam treatment and higher improvement was observed in acid-hydrolyzed samples. Gas production was significantly increased (P< 0.05) in all incubation times after steam treatment. The maximum increase in metabolizable energy (ME) estimated by gas production was from acid-hydrolyzed sample treated at 20 bar and 240 seconds. In auto-hydrolyzed samples, the biggest increase in ME was observed in the sample treated at 20 bar and 180 seconds. The results suggest that steam treatment could be used for upgrading the nutritive value of date leaves in the regions where date is grown and animals are encountered with severe feed shortage.
