Iranian Food Science and Technology Research Journal
Year:2017 | Volume:13 | Issue:4 (43)|Papers Count:20

Introduction: Converting milk into milk powder increases its shelf life up to almost 1 year, without substantial loss of quality, even at ambient temperatures. Dairy powder is frequently used because of convenience in applications for transportation, handling, processing, and ease of product formulations. Functional properties of milk powder are important due to its wide range of applications, especially in bakery products requiring desirable texture and moisture content. These functional properties include emulsification, foaming, water absorption, viscosity, gelation, and heat stability. …

Introduction: Mayonnaise, a semisolid oil in water emulsion containing vegetable oil, vinegar, egg yolk and optional ingredients such as salt, sugar and mustard, is a conventional old condiment containing high fat ingredient (minimum of 65%). The need to reduce the amount of saturated fat in diets, has led to the development of alternative processes to produce law fat mayonnaise. Cellulose and its physically-treated derivatives i.e. microcrystalline cellulose (MCC) and microfibrillated cellulose (MFC) lately investigated as NFC is one of the conventional fat replacers used in low-fat products formulation such as mayonnaise. …

Introduction: Cake is one of the most important and widely used cereals and a product of wheat flour. Usually, high-calorie in a variety of cakes is attributed to oils, eggs and sugar in their formulation. Nowadays, the risk of cardiovascular diseases is increasing in most parts of the world and the demand for using the low fat and low cholesterol foods is increasing due to the relationship between excess fat and various diseases. Therefore, it seems that the partial or complete removal of oil and egg and replacing them with other substances in the formulation of the cake is very important. …

Introduction: Health-conscious consumers are interested in eating dairy products including ice cream with less fat. As a consequence, the dairy industry has developed a variety of reduced-fat ice cream products. However, quality aspects of many of these products do not meet consumer expectations for ice cream flavor, texture, and appearance. The formation of the ice cream structure is hindered when the fat content is reduced and attributes related to quality, such as viscosity, ice crystallization, hardness, melting rate and flavor, are affected. …

Introduction: Nutrition research on the health benefits of substances in plant foods (phytochemicals) has recently advanced to a new stage, as ascorbic acid, these phytonutrients is abundant in citrus fruit, and all show physiologic actions that may contribute to cancer prevention. Citrus lemon is an important source of this nutritional quality and it has low durability due to its high water content (87%). Therefore, some practical solutions such as drying could help to increase their sustainable necessary for improve production. Different drying methods have considerable impact on the quality of final product. …

Introduction: Nowadays, use of new processing method is important for converting by-products into more marketable and acceptable forms to achieve a better utilization. Sea food processing generate protein rich byproducts that their quantity depends on processing method. One of the methods for effective protein recovery from this protein rich by-product is preparation of protein hydrolysate through enzymatic, autolytic and chemical hydrolysis. Enzymatic hydrolysis is widely employed to improve the functional and nutritional properties of the fish byproducts. Hydrolysis may be conducted as a method of separating soluble nitrogenous compounds from insoluble particles and fish oil, and offers good predictability of the products. …

Introduction: Lipid oxidation is a complex series of reactions that occurs during processing, storage and final preparation of foods containing lipids (Bera et al., 2006). Among the various methods of protection against oxidation, specific additives are used which are antioxidants (Pokorny et al., 2006).Polyphenols are natural antioxidants that possess characteristic properties, such as free-radical scavenging and inhibition of oxidizing processes in the body. For using of phenolic compound, they must be extracted from plant material. Traditional methods of extraction are labor-intensive, time consuming, and require large volumes of solvent (Wang and Weller, 2006). …

Introduction: Cornelian cherry (Cornus mas L.), which belongs to the family Cornaceae, grows in Iran, in areas such as Qazvin and Arasbaran. The fruit possesses anti-inflammatory and antioxidant properties and it is used as an herbal remedy in medicine. Separation of natural antioxidant compounds from plant sources requires an appropriate method of extraction, which is effective factor to achieve the higher efficiency of these valuable compounds. In this study, the effect of extraction methods (immersion and ultrasound) and different solvents (ethanol 100%, ethanol – water (50:50 V/V) and water) on amount of phenolic compounds and antioxidant properties of cornelian cherry fruit extract were investigated. …

Introduction: In the food industry, it is preferred to alter the formulations rather than modifying the legislations, so as to reduce the risk of facing consumer health. For instance, animal fats and oils could be replaced with vegetable oils to manufacture products with low cholesterol and saturated fatty acids. Application of vegetable-based products like vegetable-based milks as the sources which provide vegetable proteins and lipids in ice cream not only incorporates the nutritional values and health-promoting effects of vegetable compounds into ice cream, but also leads to the production of a novel product with specific properties such as lactose-free products, which could be attractive and useful for consumers. Soymilk is avegetable-based milk with a suitable lipid and protein content. …

Introduction: Roasting is one of the processing steps involved in the nut industry to improve the flavor, color, texture and overall acceptability of the product. Ppeanut is a fruit or pod of the order Leguminosae and contains 47-50% oil, 25-30% protein and is an essential source of minerals and vitamins; thus it makes a substantial contribution to human nutrition. Peanuts are readily acceptable as a cheap protein source and popular snack item that can be eaten alone or combined with other foods. Recently, peanuts have gained much attention as functional food and roasted peanuts is one of the most popular snack foods, in which roasting is a key step in the process and directly impacts the quality (crispness, taste, and flavor) and shelf-life of the final product. …

Introduction: Microencapsulation has become an important technique in the food industry. One of the methods of producing microcapsules is to use layer-by-layer adsorption, in which oppositely charged polyelectrolytes are adsorbed consecutively onto a colloidal template. Creating multilayer films based on electrostatic interactions between oppositely charged components was introduced in 1991 by Decher et al. Layerby- layer (LbL) polyelectrolyte deposition has become a popular technique for preparing polyelectrolyte capsules because of its ability to create highly tailored capsule shells through a simple, inexpensive and easily controllable adsorption process. …

Introduction: White button mushroom (Agaricus bisporus) has a high moisture content (~90%) which makes it more vulnerable to the germs and chemical reactions. The contents of fungus coating are beneficial for shelf-life extension of mushroom. Coated mushrooms loss less moisture and have firmness, better appearance and color features than uncoated mushrooms (Zahedi et al., 1390). Application of food coatings is widely used in order to extend the shelf-life of foods including mushrooms. These methods include improved packaging methods, coated treatment with a solution of anti-microbial, plant extracts and anti-browning agents. The essential oil of thyme plant (Zataria multiflora) contains derivatives of phenol such as carvacrol and thymol (Aligiannis et. al, 2001). …

Introduction: The most important treatment for celiac disease is a gluten-free diet throughout the lifetime of the patient. Corn flour is one of the alternatives for wheat flour in baking of bread and bakery products that are of high nutritional value and because of lack of gluten are suitable for people with celiac disease. Moreover, potato flour is one of the best wheat flour alternatives in bread-making and is consistent with that; and now, not only in production of bread but also in production of other bakery products. Hydrocolloids are a branch of additives which are widely used in food industry. …

Introduction: The environmental effect of synthetic plastic wastes is of increasing global concern. There is an urgent need to develop and apply renewable biopolymer materials. Development of edible and biodegradable films can help solving the waste disposal problem by partially replacing synthetic plastics (Martins et al., 2012). Chitosan; a linear polysaccharide composed of (1, 4)-linked 2-amino-deoxy-b-d-glucan, is a deacetylated (to varying degrees) product of chitin, which is the second most abundant polymer found in nature after cellulose. It has been proved to be biodegradable, biofunctional, biocompatible, nontoxic and have strong antifungal and antimicrobial properties (Aider, 2010). …

Introduction: Pectin is a complex heteropolysaccharide presented naturally in the middle lamella and primary cell walls of plant tissues. Pectin is mostly composed of a linear backbone of a-(1, 4) linked Dgalacturonic acid residues which are partially esterified with methyl alcohol or acetic acid at the carboxylic acid. Pectin is widely used as a gelling agent in food systems such as jams and jellies, fruit juices, confectionaries, bakery fillings and as a stabilizer in acidified milk drinks. Black mulberry (Morus nigra.L), originating from Iran, is a juicy fruit with dark red color and slightly acidic flavor. …

Introduction: Biopolymers are a class of polymer, which are disintegrated by an enzymatic or bio-path and the products disseminated to the surroundings do not induce negative effects. Nowadays, non-degradable polymers are quid pro quo with biodegradable ones particularly in agricultural applications, environmental and food industry use. Starch is an example of natural biopolymers, biocompatible, which is completely biodegradable in environment. It has been considered as one of the best candidates for oil based polymer substitution due to its low cost, availability and processbility. The main disadvantages of starch based polymers are their high hydrophilic nature therefore; they have poor mechanical properties and are permeable to water vapor. …

Introduction: Barberry (Berberis vulgaris) from the distant past has been used as one of the main medicinal plants in Iran and many other countries. Currently, it has been known for pharmaceutical active compounds such as berberine, which has wide application in pharmaceutical industry. Barberry fruits are used in preparing sauces, jellies, candies, marmalades and especially fruit juices. Also, the fruit contains health promoting compounds such as polyphenols and anthocyanins. Anthocyanins are bioactive compounds present in many fruits, vegetables and their products. They are responsible for the wide array of colors present in flowers, petals, leaves, fruits and vegetables and are a sub-group within the flavanoids characterized by a C6-C3-C6 skeleton. …

Introduction: Non-alcoholic beverages are consumed in many countries. There are many people who avoid alcohol because of their health concerns, and in Muslim countries alcoholic beverages are religiously banned. Malt beverages are classified based on the alcohol content as alcoholic (more than 1.2%), low alcoholic (0.5-1.2%) and with no alcohol (less than 0.5%). Malt beverages are generally produced by dissolving wort granulates in water, filtration, and adding pure hop aroma. The malt beverage has some health benefits such as protection against coronary heart diseases, cancers and ulcers. …