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Nowadays, due to the environmental problems caused by packaging based on synthetic polymers, the use of producing edible films based on biopolymers like polysaccharides, proteins, and fats has been interested. According to all the useful features of psyllium seed hydrocolloid (PH), the aim of this study was to evaluate the possibility of antimicrobial biodegradable edible film production using pH, glycerol, nisin (0, 5000 and 10000 IU/g) and Ethylenediaminetetraacetic acid (EDTA), (0, 15 and 30 wt%). The diameter of the inhibition zones against pathogenic bacteria on medium surface were measured as antimicrobial activity of films. The results showed that films containing nisin and EDTA significantly inhibition of Staphylococcus aureus) and Salmonella typhimurium growth. With increasing concentration of nisin and EDTA the inhibitory power of film against pathogenic bacteria increased. Maximum inhibition was obtained at 3416.03 IU/g concentration of nisin and highest concentration of EDTA (30%). At the optimal point, the inhibition zone against S. aureus and S. typhimurium was 2.02±0.2 and 2.2±0.3 cm, respectively. Tensile and elongation of optimal film was 13.41 Mpa and 28.51%, respectively. According to results of this study, novel biodegradable antimicrobial PH film could be suggested as meat product packaging.

IntroductionAppropriate and effective decolorization of raw and thin juice in sugar refineries is considered as an important process to obtain premium quality sugar, which due to the problems of its conventional process, membrane processes as effective and environmentally friendly processes can be used in parts of sugar industries. Among the disadvantages of the usual methods to remove membrane fouling, it can be mentioned the destruction of the membrane, environmental pollution, the remaining detergents in the membrane and the product, especially in the pharmaceutical and food industries, and the increase in production costs. Therefore, it seems that physical methods such as pre-filtration of the incoming feed, using turbulent and pulse currents to prevent excessive compression of the gel layer formed on the membrane surface are more effective and have fewer disadvantages. One of the ways to change the flow of feed entering the membrane surface is bubbling, which causes mixing the flow and increases the tangential shear stress. In fact, the hydrodynamic force that creates bubbles causes both the dragging force and the lifting force and leads to the removal of fouling and reducing the phenomenon of concentration polarization. Materials and Methods In this research, an ultrafiltration membrane (MWCO=10 KDa) pilot with a flat module (effective surface 40 square centimeters) was used to purify raw beet juice (which had passed a stage of pre-treatment with microfiltration) at the temperature of about 30 degrees Celsius and a trans membrane pressure of 3.5 bar during the process. Nitrogen gas in the amount of 0.5, 1 and 1.5 liters per minute was used in two continuous and interrupted modes for bubbling. In this way, in the interrupted mode, after every 3 minutes of filtration, the filtration process was carried out with gas for one minute. The factors such as flux, fouling and membrane resistance as membrane efficiency's factors and parameters like color, purity and turbidity as purification factors was investigated in the form of a completely random design and compared with control filtration conditions (without bubble generation). The results of this research were statistically analyzed using SAS (version 1.9) and Microsoft Office Excel 2019 software. The average data of each test in three repetitions was compared with the least significant difference (LSD) test at the 95% level. Results and DiscussionIncreasing the amount of gas during the bubbling process improved the flow rate. Also, the results showed that the decreasing trend of the permeate flux at the gassing rate of 1.5 L/min was less than other treatments and more stable conditions were seen in the sap flux during the process. Also, the amount of flux in the interrupted form of bubbling showed that after the application of bubbling, although the amount of flux increased, but after that, during the ultra-refining process, the flux decreased again and did not remain constant at that level. But in general, despite the fact that the average flux was higher in the continuous process compared to the interrupted state, there was no significant difference between them. The results related to the amount of membrane fouling after applying the process showed that by applying bubble generation in both continuous and interrupted mods, the fouling was significantly reduced compared to the usual state of ultrafiltration. Also, as the amount of gas entering the feed stream increased, the membrane fouling decreased, which was slightly higher in the continuous state than in the interrupted mod. The overall hydrodynamic resistance of the membrane in different filtration modes showed that the difference between the overall resistance of the membrane in the ultrafiltration and the ultrafiltration process with gasification is quite significant. However, although the overall resistance of the membrane in the interrupted gassing state is higher than its continuous state due to more clogging, there is no significant difference between them (P

Nowadays if essential oils can remain stable in food processing conditions, they can be used as an alternative to synthetic preservatives in food products. In this research, in addition to investigating the compounds of Zataria multiflora and cinnamon essential oils by gas chromatography-mass spectrometry, the antimicrobial properties of two essential oils before and after heat treatment (200 °C; 10 min) against Bacillus subtilis and Aspergillus niger were evaluated. Based on the obtained results, the thermal process did not significantly affect the main compounds of the essential oils. Cinnamaldehyde and eugenol were the main constituents of cinnamon essential oil, while phenolic compounds (thymol and carvacrol) made up 61.5% of Z. multiflora essential oil. The minimum inhibitory concentrations (MICs) of Z. multiflora and cinnamon essential oils against Aspergillus niger were 250 and 4000 µL/mL, respectively, while the minimum fungicidal concentrations (MFCs) were 250 and 16,000 µL/mL, respectively. Against Bucillus subtilis, the MIC and minimum bactericidal concentrations (MBC) values were 7.8 and 15.6 µL/mL for Z. multiflora, and 16,000 and 32,000 µL/mL for cinnamon, respectively. The inhibition zones of heated Z. multiflora and cinnamon essential oils were 20.5 and 16.05 mm against A. niger and 29.00 and 17.00 mm against B. subtilis, respectively. In general, the results demonstrated that the thermal process did not significantly affect the antimicrobial activity of the essential oils, meaning that they are suitable for use as antimicrobial agents in products that undergo thermal processing.

Encapsulation in liposome structure can be used as a protective carrier system for bioactive compounds during processing and storage under different conditions. Phycobiliproteins (PBPs) extracted from algae with antioxidant, antimicrobial, anti-cancer and anti-inflammatory properties can be applied to produce raw materials for functional foods. Therefore, in the present study, phycobiliprotein pigment was extracted from Gracilaria algae and the amounts of pigment was investigated. Also, nanoliposomes containing PBPs coated by chitosan (0, 0.5, 1 and 1.5%) were prepared and their physicochemical properties, antioxidant and antimicrobial activity were evaluated. The mean diameter of nanoliposomes and Polydispersity index (PDI) ranged from 336.9 to 577.7 nm and 0.25 to 0.28 in nanocarriers, respectively. The highest values of nanoliposome encapsulation efficiency of PBPs (83.98%) were obtained under optimal conditions in nanoliposomes with 1.5% chitosan coating. The results showed that the antimicrobial activity of the treatments increased significantly after encapsulation in the nanoliposome. In addition, the antioxidant activity of PBPs increased significantly after nanoencapsulation in liposomes. So that the EC50 level decreased to 81.27 and 107.67 ppm in DPPH and ABTS tests in nanoliposomes with 1.5% chitosan coating, respectively. Based on the findings of this study, it can be realized that nanocoating with chitosan effectively increases its stability, antimicrobial and antioxidant properties. Therefore, in order to increase the stability of natural compounds during different processes, it is recommended.

This study is focused on the effect of phycobiliprotein extraction of Gracilaria on the quality of common carp burgers, and the application of nanoliposomes containing pigment in the improvement of its antimicrobial and antioxidant activity of burgers during refrigerated storage in 18 days. Burgers were incorporated with phycobiliprotein and liposomal phycobiliprotein (2.5% and 5% w/w), and their chemical and microbial changes in terms of pH, peroxide value (PV), thiobarbituric acid (TBA), total volatile basic nitrogen (TVB-N), total viable counts (TVC), psychrotrophic bacterial counts (PTC), and sensory characteristics were evaluated. Results presented a nanoliposome size of about 515.5 nm with capable encapsulation efficiency (83.98%). Our results showed non-encapsulated phycobiliprotein could delay the deterioration of common carp burgers, as a reduction in PV, TBA, and TVB-N, TVC, and PTC values in burgers treated with free and nano encapsulated phycobiliprotein. Moreover, the potential of phycobiliprotein was improved when it was encapsulated into chitosan coated liposomes. Burgers treated with 5% nanoliposomes displayed the lowest amount of lipid oxidation and microbial deterioration in comparison to others during storage. According to chemical, microbial and sensory evaluation, the shelf life of common carp burgers was increased in samples treated with encapsulated phycobiliprotein at 2.5% and 5%, as compared to the control (p ≤ 0.05).

In the present research, the optimization of formulation of fortified chocolate using Chia seed Oil as source of Omega-3, vitamin D3 and calcium was investigated by surface response method.Different amounts of calcium (60, 95 and 130 mg), vitamin D3 (0.5, 0.75 and 1 μg) and Chia Oil (1, 3 and 5 mg) were added to the chocolate in the 20 formulations designed by Design Expert software and the sensory properties of the fortified chocolates were then tested by the evaluators. Based on the analysis of response surface method, 24 optimized samples were proposed by the software, all of which contained Omega-3 in the minimum range (1 mg) and calcium in the maximum range (130 mg) and three formulas were selected that they differed only in the amounts of vitamin D3 (0.5, 0.75 and 1 μg). Texture and thermal analysis, colorimetery, moisture, water activity and peroxide value tests were performed on these samples at first and 3 months later. Evaluation of sensory properties showed that the taste, texture and overall acceptance parameters of fortified chocolates were reduced compared to control (p < /em>

Abstract Background The jujube is mainly grown in the subtropical and tropical regions of Asia. Due to owning bioactive compounds such as polyphenols, it was considered as medicinal and nutritional plant in traditional medicine. This study aimed to extract phenolic compounds from Ziziphus jujuba using subcritical water (SCW) process. The possible combinations of temperature, time, and fruit-to-solvent ratio were investigated using response surface methodology. Results The total phenolic compounds (TPC) and radical scavenging capacity (RSC) of 975.94 mg/g and 53.98%, respectively, were recovered at optimum extraction conditions (170 °C, 74.49 min, and fruit-to-solvent ratio of 1:5.29). The extract obtained in SCW optimum conditions was put under thermal treatments including low temperature long time, high temperature short time, cooking, baking, and sterilization. The results showed after baking, the amount of TPC, RSC, and absorbance at 420 nm increased. The quantity of gallic acid, chlorogenic acid, p-coumaric acid, ferulic acid, and rutin increased significantly. The efficiency of SCW extract in retarding lipid oxidation in bulk oil and O/W emulsion model was investigated at 50 °C for 10 days. After 10 days, the peroxide value of bulk oil (1.1 meq O2/kg) containing SCW extract was lower than O/W emulsion model (2.2 meq O2/kg). Conclusion The subcritical extracted phenolic compounds seem to have good antioxidant activity as well as thermal stability for using in food or drug industries.

In this study, the carbohydrates material include Arabic gum (0-100%), maltodextrin (0-50%) and inulin (0-50%) were used as wall compounds for the microencapsulation of cardamom essential oil. A simple-central mixture design was used to experiment design, to optimize and find the best combination for maximal release in the mouth media. The aim of this study was microencapsulation of cardamom oil active ingredients and the effect comparison of adding maltodextrin and inulin to Arabic gum as coating materials on the responses involve the microencapsulation yield, and release of active ingredients and recovery of powder. In this study, the relationship between glass transition temperature and the release of essential oils of cardamom essential oil was investigated in saliva. The results showed that the optimal combination of Arabic gum, maltodextrin and inulin with ratios of 66.8:33.2:0.0, respectively, under these conditions, the microencapsulation yield of the essential oil, alpha-triphenyl acetate and 1 and 8 cineol were 83.57, 91.79 and 90.87%, the release of the active ingredient was 93.27% and the powder recovery was 67.72%. The glass transition temperature of the optimal combination was 42.9 °C, which was a suitable temperature for preserving the active ingredients at ambient temperature and release in saliva. According to the results of this study, the cardamom essential oil optimal combination can be successfully applied in the products as chocolate, candy, sugar cubes, without the release of active ingredients at ambient temperature and with the rapid and high release in the mouth media.

Nowadays, food adulteration is important to marketing and production. The purpose of this study was to classify different types of honey (Thyme, Chaste tree, Jujube, Coriander, Barberry, Acacia and Alfalfa) with different herbal origin based on color characteristics, salinity, electrical resistance and total dissolved solids (TDS). For classification of honey, principal component analysis (PCA), linear discriminant analysis (LDA) and cluster analysis (CA) of chemometrics method, were used. The results showed the two principal components (PC1 and PC2) comprise 77.69% of the total variance, which indicates the distinction between different honeys based on physicochemical characteristics. It was also shown in the LDA method was able to classify different honeys with an accuracy of 75%. On the other hand, the method of CA in the distance of 85.58, honey was placed in 7 groups that contained thyme, coriander, acacia, barberry and jujube honey in separate groups and alfalfa honey and chaste tree honey were scattered among the groups.

According to the importance of expanding the use of clean energy, especially solar energy, in this study a solar cooker was designed, built and its performance in terms of the angle of the side mirrors at the same time and working time on the amount of energy absorbed was investigated by response surface methodology (RSM). The total amount of solar radiation as a measure of energy intake and increased water temperature inside the container was taken as an indicator of the amount of energy absorbed. The model on the basis of response surface methodology was used to validate the test and had a good validation (R2=0.89, R2adjusted=0.74 and lack of fit: no significant). Analyzing the results of a mathematical model was obtained for investigation of the effect of the side mirrors angle and time on the performance of the system. The amount of absorbed energy by theory and laboratory has been also compared and the average of error at all tests was 2.75%. Based on this model in the optimal condition, energy absorption was increased by 22.56%. This study was done at Institute of Food Science and Technology located in Mashhad with latitude 54 and 36 degrees and a height of 985 meters above sea level.

In the present study, the Iranian jujube honey was evaluated for its total antioxidant activity by DPPH assay, total phenolic content (TPC) by using the Folin–Ciocalteu reagent, and brown pigment formation (BPF). The kinetics of changes in jujube honey samples heated at various temperatures (45, 55 and 65 °C) over 10 days were studied. Increasing treatment temperature and time caused an increase in all three parameters including, antioxidant activity, BPF and TPC. Increases in BPF and TPC followed zero-order kinetics, and the rise in antioxidant activity varied depending on heating temperatures, following second-order, first-order and zero-order kinetics when samples were heated at 45, 55 and 65 °C, respectively. At 45–65 °C, activation energy values of 68 and 64.7 kJ/mol−1 were obtained for BPF and TPC, respectively. Linear relationships were observed between antioxidant activity and BPF, TPC and antioxidant activity, and BPF and TPC, such that the highest phenol content was related to the darkest honey sample. For all three parameters, heating honey to 65 °C was found to be more effective than heating to 45 or 55 °C.

Donut is one of the most popular fried bakery products among consumers. This product is susceptible to the formation of acryl amide during processing. In this study, the effect of frying temperature (160, 170 and 180 °C), the amount of yeast (0.5, 1 and 1.5 %) and the fermentation time (30, 45 and 60 min) on the physicochemical properties (moisture content, acidity, pH, total sugar, reducing sugars, color) and the amount of acryl amide in the final product was evaluated. The results showed that the amount of yeast, fermentation temperature and frying time affect many chemical properties (moisture, pH, acidity, protein, total sugar and color) as well as the formation of acryl amide in the final products. Increasing amount of yeast and frying temperature, the moisture content and total sugar of products increased and decreased, respectively. Increasing the amount of yeast caused a significant decrease in the amount of acryl amide in the final product, but fermentation time was not significantly effective on the amount of acryl amide in the final product. It was also found that increasing the temperature from 160 to 180 °C increased the acryl amide content from 13.24 µg kg-1 to 27.34 µg kg-1. Finally, it was found that the adjustment process can reduce the formation of acryl amide in donuts products.

Acrylamide is a chemical compound which starchy foods such as biscuits are prone to formation. Since biscuit is one of the most consumed floury products specially for children, the objective of this research is to assay the effect of the replacement of whey protein powder with dried milk in the 3 levels (25, 75 and 100 %), and the effect of the replacement of ammonium hydrogen carbonate and baking powder with sodium hydrogen carbonate on acrylamide, reducing sugar, protein, moisture, pH and acidity content on Petit Beurre and Madar biscuits were investigated. By increasing whey protein powder replacement in both kinds of biscuits, pH, only in samples which were completely produced by dried milk powder and whey protein powder, was considerable. In this phase protein content had decreasing, while acidity and reducing sugar had increasing procedure. The content of acrylamide in Madar and Petit Beurre biscuit samples produced by 100 % whey protein powder, in comparison with control, decreased 11.9 % and 4.1 % respectively, which may be related to the decrease of protein content in formulation. The content of pH and acidity respectively decreased and increased by replacing sodium hydrogen carbonate with baking powder. By using sodium hydrogen carbonate in both biscuit samples the content of reducing sugar considerably decreased. The minimum and maximum amount of acrylamide was observed in the samples containing sodium hydrogen carbonate and ammonium hydrogen carbonate, respectively.

One of the sugar beet compounds is α- amino azote which causes an increase in the amount of molasses produced. Therefore, the effect of beets size (in 4 levels; large, medium, small and mixed) obtained from three different regions as well as the height of storage (in 4 levels; floor of silo, 1 meter height, 3 meter height, 5 meter height) on the amount of α- amino azote in silos of Shirvan sugar factory during 18 days of storage was investigated. One of the effective factors on increasing of α- amino azote is conditions of storage in silos. The results showed that maximum increasing of α- amino azote during period of storage (18 days), belong to small sugar beets with 23.09 to 29.7 percent and minimum increasing of α- amino azote belong to large sugar beets with 11.83 to 18.65 percent. Further, the results showed that minimum increase of α- amino azote belonged to large sugar beets that were stored in surface of silos (5 meter height) with 10.91 to 11.21 percent and maximum increase of α- amino azote belonged to samples that were stored in middle levels of silos (3 meter height) with 20.32 to 33.95 percent.

In this study, an adaptive neuro-fuzzy inference system (ANFIS) used for the prediction of permeate flux as a function of the physico-chemical and operating parameters during ultrafiltration of milk. An ultrafiltration pilot plant equipped with hollow fiber module and polyethersulfone membrane (MWCO 10 kDa) was used to do the milk ultrafiltration with various physico-chemical properties, consists of five levels of pH (5.6 , 6, 6.6, 6.9 and 7.6) and three levels of ionic strength (0.03, 0.06 and 0.12) and under different operating conditions including transmembrane pressure (TMP) at three levels (0.1, 0.3 and 1 atm), temperature at three levels ( 30 , 40 and 50 °C ) and the flow rate at three levels (10, 30 and 46 m/s). In order to model the effects of operating parameters and physicochemical properties of milk on permeate flux, the experimental data was randomized. 30 % of the data for learning, 30% of the data for evaluation and 40 % of the data was used to test the model. The results showed that the Nero–Fuzzy modeling approach is capable to predict the permeate flux under various operating conditions and physiochemical characteristics of milk, and modeling results represented there was an excellent correlation (average R = 0.93) between the predicted data and experimental data.

In this research the nanocomposite antioxidant film of rice starch-halloysite nanoclay incorporated with Bene extract prepared and its physicomechanical and antioxidant properties were evaluated. For this purpose, the experiments were done according to central composite design based response surface methodology to assess the effects of halloysite concentration in the range of 0-10% w/w starch and Bene extract concentration in the range of 0-30% w/w starch on dependent variables containing tensile strength, elongation at break, water vapour permeability and antioxidant activity for bionanocomposite film. The obtained results revealed that in the studied range of halloysite concentration and Bene extract concentration, their linear effects on the dependent variables were significant (P