School of Health and Nutrition

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The Faculty of Health was established under the name of “Faculty of Health and Nutrition” in 1991 by incorporating the departments of Biochemistry and Nutrition of the Faculty of Pharmacy; Health Department of the Faculty of Medicine; and the department of Disease Control and Environmental Health of the Faculty of Paramedical Sciences. The Faculty of Health was located at the building of the Faculty of Pharmacy, Rehabilitation and Dentistry for several years. In 2001, the faculty was relocated to its main building and formally began its educational activities. The Faculty of Health began its research and educational activities in 2012. The school of Nutrition was firstly established as a department inside the School of Health and Nutrition in 1991 following the merging of the departments of Biochemistry and Nutrition from the school of Pharmacy (1974), the department of Health from the school of Medicine (1953) and the departments of Environmental Health and Disease Control (1987) from the school of Paramedical sciences. The school gained its independency and has started its educational activities with independent staff and facilities and its own educational space and laboratories in 2012.

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Author: search.filters.author.Ahangari, Hossein

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    Evaluation of the performance of optical nanosensor for detection and measurement of the biogenic amines of putrescine and cadaverine in Cyprinus carpio
    (Tabriz University of Medical Sciences Faculty of Nutrition and Food Sciences, 2023) Ahangari, Hossein; Ehsani, Ali; Minami, Tsuyoshi
    Evaluation of the performance of optical nanosensor for detection and measurement of the biogenic amines of putrescine and cadaverine in Cyprinus carpio Hossein Ahangari, Hamed Hamishekar, Balal Khalilzadeh, Tsuyoshi Minami, Ali Ehsani Abstarct Background: Putrescine and cadaverine are of most important microbial metabolites that are used as an indicator of food freshness, and recent studies have revealed their role in the occurrence of food poisoning symptoms. The standard methods of measuring these microbial metabolites are based on chromatography. In addition, various nanosensors have been investigated in the identification of biogenic amines with higher accuracy and comparable speed to standard methods. Purpose: In this study, the efficiency of the colorimetric nanosensor based on synthesized gold nanoparticles and coated by glutaraldehyde was evaluated in the detection of putrescine and cadaverine in carp samples to evaluate the ability of this nanosensor to replace or development of standard techniques. Methods: Gold nanoparticles were used for the first time by the method developed in this study and using glutaraldehyde as a reducing and coating agent for the synthesis of the nanosensor in evaluation of putrescine and cadaverine. The characteristics of gold nanoparticles were evaluated by SEM, TEM, DLS, FTIR and the level of putrescine and cadaverine in fish samples were measured by HPLC-MS/MS. Results and Discussion: Stable gold nanoparticles with zeta potential and average nanoparticle size of -31.2±2.3 mV and 5.7±0.5 nm were successfully synthesized at room temperature without the need for special conditions and materials of previous studies. This nanosensor detected the putrescine and cadaverine with a detection limit of 0.12 ppm and a linear range of 0.5-3.5 ppm and showed practical results in evaluating the biogenic amines in food samples. The obtained results show the capacity of the nanosensor as an alternative to expensive methods that can be developed in the form of paper based test strips based on color change in monitoring of food freshnes. The results obtained from the nanosensor indicate its appropriate capacity as a method in replacing or development of standard methods for biogenic amines measurment. This nanosensor can be developed in the form of test strips based on color change in freshness monitoring of the food samples. Keywords: Biogenic Amines; Gold Nanoparticles; Nanosensor; Glutaraldehyde; Colorimetric detection
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    Evaluation of microbial quality of enteral feedings made at Tabriz Imam Reza (AS) hospital and implementation of the Hazard Analysis and Critical Control Point system to make them standard
    (Tabriz University of Medical Sciences, School of Health, 2020) Ahangari, Hossein; Tarighat-Esfanjani, Ali; Food Hygiene and Safety; Ehsani, Ali; Hashemi, Mohammad
    Abstarct Background: Consumption of contaminated enteral tube feedings can cause several infections in immunocompromised patients. To control the risks of microbial contamination as well as to prevent food safety problems such as food poisoning and foodborne infections, the microbial quality of enteral tube feedings must be monitored continuously. Purpose: Evaluation of microbial quality of enteral tube feedings and identification of Staphylococcus, Pseudomonas and Klebsiella species and implementation of HACCP system to standardize the microbial quality. Methods: Bacterial strains of enteral tube feeding samples were isolated and counted using specific culture media and final confirmation was performed using PCR. After the bacterial counting, the HACCP was performed and the CCPs were controlled for declining of the bacterial contamination. Results: Based on the results of counting the number of bacterial colonies of samples and comparing them with the FDA standard for approved hospital foods, 57% of the solutions have a higher microbial load than the standard. By the implementation of the HACCP system, the bacterial count of isolated species was reduced and total mesophilic count of the samples was 17% decreased. Conclusion: Improving hygienic conditions in the preparation room of the enteral feedings, together with the employment of the HACCP system to prevent contamination, helps to avoid the foodborne diseases as much as possible. Keywords: Enteral Tube Feeding; Microbiological Analysis; 16S rRNA amplification; Polymerase Chain Reaction