Showing 6 results for کردجزی
Volume 6, Issue 1 (6-2017)
Abstract
The effect of ascorbic acid on shelf life of rainbow trout (Oncorhynchus mykiss) fillets in the refrigerator based on total microbial load, chemical evaluation was investigated. For this reason, the fish were divided into three groups, including without injections (treatment 1), fish with intravenous injection of ascorbic acid in doses of 0.1 and 0.3% (treatment 2 and 3) and fish with intramuscular injection in doses of 0.1 and 0.3% (treatments 4 and 5). After 62 hours of injection, fish (400 ±10g) were caught and filleted, then kept for 16 days in refrigerator. During this period, every 4 days, peroxide value (PV), thiobarbituric acid (TBA), free fatty acids (FFA), total volatile nitrogen base (TVB-N) and total bacterial load (TVC) indicators were measured. Treatments 3 and 5 showed a significant difference (p≥0.05) in PV, TBA, FFA, TVB-N and TVC indicators in comparison to other treatments. There was also a significant difference between the treatments 3 and 5 (p≥0.05) in the indicators of the TVC, TBA, FFA and TVB-N that indicated better performance of intravenous injection of ascorbic acid 0.3% after 8 days storage in comparison to intramuscular injection of 0.3%. According to the results, in intramuscular or intravenous injection of different doses of ascorbic acid increased the shelf life of rainbow trout fillet during storage in the refrigerator until day 12.
Volume 8, Issue 4 (Fall 2019)
Abstract
Abstract
Aims: For the purpose of marketability and consumer preferences, two types of hand moisturizing products (Alginate gel and Fucoidan cream) produced from Sargassum algae, this study was conducted. then evaluated with a common commercial sample as a control.
Methods: Gel and two cream samples were prepared in 3 jars of 10 g to evaluate 30 individuals as panel members. Evaluation was performed using one product per week and with a one-week break between sessions. The designed questionnaire consisted of sociological questions and 12 characteristics of the products that were rated with 3 points of preference The Friedman test was used to analyze the ratings and the scoring method was used to identify the final product.
Results: Two characteristics of produced cream and gel (moisturizing and shelf life) at a significant level. The gel had the highest moisturizing capacity and the cream had the highest shelf life. Consumers paid more attention to the nourishing and hydrating properties of the skin, being organic and soft in choosing the suitable moisturizer for their hands. They like moisturizing cream of 250 gr jar. Nutrition and hydrating, therapeutic effect and skin repair were also ranked as high priority. Ultimately, the Fucoidan moisturizing cream gained the highest preference in market.
Conclusion: The Fucoidan cream produced from Sargassum algae compared to alginate gel from this alga, as a moisturizer with suitable shelf-life and have other hand cream properties, can be an acceptable commercial product in the market.
Volume 9, Issue 2 (Spring 2020)
Abstract
To identify the behavior of fish consumer in Iran's largest fish market in order to improve sales and obtain customer satisfaction. After designing and completing the questionnaire, descriptive statistics and Friedman test, chi-square and stepwise regression were used for data analysis. Consumers were very much in agreement with the direct sale of Fish by producer in the market, government subsidies to buy fish, and the aquatic properties on the market. Their highest priority is to buy trout and then southern fish, shrimp, Caspian Sea fish and warm-water fish. More than half of consumers were introduced to the market for the first time through advertising and introducing their friends and acquaintances, and 46% were familiar with the market because of their home proximity. The most important marketing mix was advertising, and the most important reason for buying fish from this market was the freshness and diversity of the fish. Research shows that men buy more fish than women cross-country people, women born in coastal areas and high-income buyers. Given the tendency of consumer to be familiar with the market and the importance of advertising, paying attention to this and targeting male buyers will be very effective in market prosperity. Considering the numerous research results, including inserting aquatic properties and installing electronic signage on and off the aquarium in the market and helping improve household income is another way to improve customer satisfaction.
Volume 14, Issue 62 (4-2017)
Abstract
Skin, bones, frames, heads and tails are by-products produced during the processing of fish and prawn. These by-products can be enzymatically hydrolyzed and be converted products with beneficial functional properties. So, Protein hydrolysates were prepared from green tiger prawn (Penaeus semisulcatus) waste using flavourzyme and response surface methodology (RSM) based on 18 treatments was applied to study the effect of enzyme to substrate ratio, temperature and time on the protein. The antioxidant activities were measured using 2,2-diphenyl-1-picryl-hydrazyl (DPPH), hydroxyl radical-scavenging activity and ferric reducing antioxidant power. Totally, products have showen better response in 2,2-diphenyl-1-picryl-hydrazyl (DPPH) scavenging activity in comparison to hydroxyl radical-scavenging activity and Ferric (Fe3+) reducing antioxidant activity.. Among the treatments produced, 7 treatment (hydrolysis temperature of 54.6 0C together with enzyme to substrate ratio of 1.61 % and hydrolysis time of 105.8 min) with degree of hydrolysis (33.5%) and protein (79.5%) were the optimum conditions to obtain the highest antioxidant properties. These results suggested that prawn waste protein hydrolysates could be useful in the food industry.
Volume 16, Issue 86 (4-2019)
Abstract
Volume 16, Issue 97 (March 2020)
Abstract
In recent years, multiple drug resistance in human pathogenic microorganisms have developed due to indiscriminate use of commercial antimicrobial drugs commonly used in the treatment of infectious diseases. This situation forced scientists for searching new antimicrobial substances from various sources, like medicinal plants, which are the good sources of novel antimicrobial chemotherapeutic agents. In this study, the antibacterial effect of Cardin leaf was investigated. Hydroalcoholic extract of this plant was prepared at concentrations of 0.390 to 100 mg/ml and antimicrobial effect of extract were tested with disk diffusion and agar-well diffusion diffusion method against Listeria monocytogenes, Salmonella enteritidis and Pseudomonas aeruginosa strains. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the Cardin extract were investigated by dilution method. In the disk and well diffusion methods, the highest effect of extract on the bacteria was observed at concentration of 100 mg / ml, with the highest diameter of deterioration hole. Of course, the effect on gram-positive bacteria was more than gram negative. The inhibitory concentration of extract (MIC) on Listeria monocytogenes, Salmonella enteritidis and Pseudomonas aeruginosa was 12.5, 25 and 50 mg/ml and the MBC was 50, 100 and 100 mg/ml, respectively. The results showed that effect of Cardin extract on gram-positive bacteria was more than gram negative and the diameter of the non-growth halo increased with increasing concentrations of the extract.
