Use of microalgal biomass as functional ingredient for preparation of cereal based extrudates: impact of processing on amino acid concentrations and colour degradation kinetics

Abstract Suitability of developing Spirulina incorporated cereal based low cost nutritious extrudates was analysed against extrusion processing parameters. Most significant extrusion processing parameters considered for present study were feed moisture (20-25%), die temperature (100-120 °C) and screw speed (50-100 rpm). Different extrusion conditions were used to obtain most acceptable rice: Spirulina blend extrudates. In present study before extrusion processing different additives (citric acid and sodium bicarbonate) were added in rice: Spirulina blend and checked its effect on colour degradation kinetics at varied packaging and storage conditions. Higher screw speed (100 rpm) indicating less residence time of feed material inside the barrel resulted in higher colour retention of rice: Spirulina (97:03) blend extrudates. Kinetics for rice: Spirulina (97:03) blend extrudates indicates faster rate of colour degradation in terms of lightness (half-life of 4 days) when packed in metalized polyethylene at 50°C with 65% relative humidity. Increased concentration of Spirulina (1-3%) in raw formulations resulted in increase in concentration of all amino acids. Impact of extrusion processing has shown non-significant (p ≤ 0.05) effect on amino acid concentrations of rice: Spirulina blend extrudates. Also, all the spirulina added samples showed good consumer acceptability with the score of 6.7

Bioactive compounds, nutritional benefits and food applications of colored wheat: a comprehensive review.

The consumers' demands have changed from energy providing diet to a diet with a balanced nutrient profile along with metabolic, physiological and functional health benefits. They are seeking colorants derived from natural sources to enhance the nutritional and antioxidant value of foods. Colored wheat (Triticum aestivum) contains many phytochemicals, responsible for numerous health benefits. Colored wheat (blue, black, purple and red) contains a good amount of anthocyanins and carotenoids that are primarily located in the outer aleurone layer. Food regulatory and safety authorities and food processing industries are trying to minimize the usage of synthetic food colorants and dyes. Colored wheat is imperative for food processing industries as high-value pigments present in the bran layer (milling industry co-product) can easily be extracted and utilized as functional foods and natural colorants. The extracted pigments such as anthocyanin can replace synthetic dyes currently used in food, drug and cosmetics. Additionally, natural additives improve the nutritional value, appearance, texture, flavor, and storage properties of food products. This review presents a brief knowledge of the nutritional composition of colored wheat including phytochemicals and bioactive compounds like flavonoids, phenolic compounds, their health benefits, methods and technologies used for processing and extraction as well as the effects of processing on these compounds.

Bioactive compounds of Aegle marmelos L., medicinal values and its food applications: A critical review.

Aegle marmelos L. (bael) is a fruit tree of Rutaceae family, widely grown all over the world. This plant is gaining popularity because of its nutrient-rich fruits and immense traditional medicinal usage and pharmacological properties. The health promotive and protective effect of bael fruit is accounted by fibers, carotenoids, phenolics, terpenoids, coumarins, flavonoids, and alkaloids. The curative relevance of these compounds has been assessed by various in vivo and in vitro studies. Fruit shows numerous possible health benefits, namely, radio-protective effects, peroxidation, antibacterial, inhibition of lipid, antidiarrheal, gastroprotective, antiviral, antidiabetic, anti-ulcerative colitis, cardioprotective, free-radical scavenging (antioxidant) and hepatoprotective effects. The health benefits of bael are not only limited to edible portion (fruit), but it also extends to nonedible portion (root, trunk, bark, leaf, flower and seed) having comparable biologically active compounds. Increasing awareness about the role of diet among health-conscious consumers for human well-being has increased the interest in functional foods thereby exploration of the functional attributes of various underutilized plants is being reaffirmed and various sources are emerged out as suitable food material for processing industry. The various scientific reports collected from different bibliometric sources suggested that A. marmelos and its bioactive constituents could play a vital role in the prevention of several chronic and degenerative diseases associated with oxidation stress. This review emphasis on recent scientific evidences on nutrition and bioactive profile of A. marmelos, health benefits along with clinical and nonclinical trials of various phytoconstituents and A. marmelos potential in food processing industry for various food products. Our study suggests that this plant does indeed have pharmacological properties of interest, however, further extensive research is needed to establish a potential strategy that can balance the pharmacological and toxic effects of bael.

Novel oil extraction technologies: Process conditions, quality parameters, and optimization.

Conventional techniques of extracting oil using organic solvents pose health, safety, and environmental concerns. In modern extraction methods, green solvents such as water, ethanol, ethyl acetate, carbon dioxide, ionic liquids, and terpenes are currently gaining prominence. These green solvents present no signs of pollution and remain in liquid form over a temperature range of 0 to 140 °C. Other techniques covered in this review include microwave-assisted enzymatic extraction, ultrasound-assisted extraction, supercritical fluid technology, high pressure-assisted extraction, and pulse electric field-assisted extraction. These techniques are considered environmentally friendly because they exhibit less hazardous chemical synthesis, use renewable feedstock, and reduce the chemical load and emissions generated by organic solvents. Aqueous enzymatic extraction is a novel technique that uses enzymes as the medium for extraction of oil. Selection of the enzymes solely depends on the structure of the oilseed and the composition of the cell wall. Studies reveal an enzyme to substrate ratio of 1% to 8%, the temperature of 40 to 55 °C, and a pH of 4 to 8 to be typical for enzymatic extraction of oil from different oilseeds. Microwave-assisted extraction has proven to impart significant effects on mass transfer and offers high throughput and extraction efficiency. A microwave power of 275 to 1,000 W and a temperature range of 30 to 60 °C are noticed in the different studies. The review presents a comprehensive account of the modern extraction techniques, the parameters responsible for yield and quality, and their industrial applications. Besides, the review highlights the optimized parameters for oil extraction from different oil-bearing materials.

Physicochemical characteristics, bioactive compounds and industrial applications of mango kernel and its products: A review.

Mango (Mangifera indica L.) is a fruit plant of family Anacardiaceae, widely grown all over the world, and is a very popular fruit in the world market. Mango fruit is the second most traded tropical fruit and fifth in terms of production globally. Large quantities of mango processing coproducts are generated (peels and seeds), which usually are discarded as waste, yet are a potential source of fat, protein, carbohydrate, and certain bioactive compounds. Mango kernel is a remarkably rich source of macronutrients and micronutrients including calcium, potassium, magnesium, phosphorus, and vitamins A, E, K, and C. Phytochemicals with a notable therapeutic potential such as tocopherols, phytosterols, carotenoids, polyphenols (gallotannins, flavonols, benzophenone derivatives, mangiferin, homomangiferin, isomangiferin, anthocyanins, kaempferol, and quercetin), and phenolic acids (4-caffeoylquinic acids, caffeic, coumaric, ellagic, gallic, and ferulic acid) are reported. The phytochemicals have high antioxidant, antimicrobial, anticancer, and, antiproliferation activities and could be used for food, cosmetic, and pharmaceutical applications. The nutritional composition of mango kernel constitutes 32.34% to 76.81% carbohydrate, 6% to 15.2% fat, 6.36% to 10.02% protein, 0.26% to 4.69% crude fiber, and 1.46% to 3.71% ash on a dry weight basis. The nutritional profile of the kernel suggests its usability as a food ingredient in the development of value-added products such as mango kernel oil, mango kernel butter, mango kernel flour, and biofilms among other diverse products. This comprehensive systematic review explores mango kernel as a potential and novel food ingredient to meet the needs of a health-conscious population. The review also provides a remedy to waste management and environmental pollution.

Vegetable milk as probiotic and prebiotic foods.

Vegetable milks are fast gaining attention on the global scale as the possible alternatives due to concerns associated with milk consumption. In particular, issues varying from allergenic constituents and lactose intolerance to social and religious beliefs among consumers have induced an increase in the market demand for vegetable milks. Their concomitant nutritional and bioactive components appraise them of the suitable profile for the food-based carriage and delivery of probiotics. More so, the presence of prebiotics in their natural configuration makes them serviceable for the assurance of the needed probiotic viability, subsequent to their exposure to digestive conditions. On another note, their availability, ease of processing, and cost-effectiveness have been established as other possible rationales behind their adoption. This chapter comprehensively delineates the probiotic and prebiotic food-usage of vegetable milks. Captions related with consumer concerns, processing operations, nutritional and prebiotic constitutions, metabolic interactions during probiotic fermentation, and associated health benefits of vegetable milks are discoursed.

Nutritional, phytochemical, functional and sensorial attributes of Syzygium cumini L. pulp incorporated pasta.

Nutritional, phytochemical and antioxidant potential of wheat pasta was enhanced by incorporation of S. cumini pulp (0, 10, 20, 30 and 40%). Incorporation of fruit pulp remarkably elevated the antioxidant activity (5.76 ±â€¯0.02 to 10.20 ±â€¯0.01%), ß-carotene (1336 ±â€¯1.84 to 7624 ±â€¯1.57 µg/100 g), total phenolic content (111.2 ±â€¯0.08 to 176.3 ±â€¯0.84 mg GAE/100 g), dietary fiber (7.08 ±â€¯0.01 to 16.6 ±â€¯0.03%) and ash content (0.59 ±â€¯0.01 to 2.96 ±â€¯0.10%). Though with addition of pulp, gruel loss was increased, but it was within acceptable limit i.e. below 10%. Cooking time and pasting temperature of pasta was increased with higher amount of pulp incorporation. Lightness (L*) and yellowness (b*) of the product were decreased with incremental incorporation of pulp while redness (a*) was increased. On the basis of physical, phytochemical and sensory parameters, pasta with 30% pulp was found to be most acceptable with the overall acceptability of (8.1 ±â€¯0.28).

Bioactive compounds of beetroot and utilization in food processing industry: A critical review.

Beetroot is recognized as health promoting food due to presence of essential components such as vitamins, minerals, phenolics, carotenoids, nitrate, ascorbic acids and betalains that promote health. Betalains occur in two forms i.e. betacyanin (red-violet pigment) and betaxanthin (yellow-orange pigment) and are recognizable commercially as a food dye due to non-precarious, non-toxic, non-carcinogenic and non-poisonous nature. Beetroot is premeditated as a boon for the food industry and used as food colorant or additive in food products such as ice-cream, yogurts and other products. The beetroot extract is used to improve the redness in tomato pastes, soups, sauces, desserts, jams, jellies, sweets and breakfast cereals. Overall objective of this review is to provide a brief knowledge about the valuable phytochemicals and bioactive compounds present in beetroot and their association with health benefits, beetroot processing for food application and their effect on beetroot pigment.

Bioactive compounds and pharmacological and food applications of Syzygium cumini - a review.

The present review explores the nutritional, phytochemical and pharmacological potential as well as diverse food usages of Syzygium cumini. S. cumini is a traditional medicinal plant with various bioactive compounds distributed in all parts of the plant. The major bioactive compounds present in the edible part are myricetin, oxalic acid, gallic acid, citronellol, cyanidin diglucoside, hotrienol, phytosterols, flavonoids, carotenoids and polyphenols as well as micronutrients, accounting for numerous health benefits. The potential benefits of these bioactive compounds are to prevent/reduce metabolic abnormalities and various diseases. The health protective effects and functional properties of the plant were proved by different in vitro and in vivo pharmacological studies. All parts of the plant have good health benefits like hypoglycemic, anti-inflammatory, antianemic, antibacterial, antioxidant, antiallergic, hepatoprotective, hypolipidemic and antipyretic properties. The fruit of S. cumini can be consumed raw or processed in the form of jam, jellies, wine, fermented beverages and many other value added food products.

Effect of processing parameters and principal ingredients on quality of sugar snap cookies: a response surface approach.

Effects of processing parameters such as creaming time, dough mixing time, cookie thickness, baking temperature, time and principal ingredients viz. sugar, fat and water on quality of sugar snap cookies were investigated using the Response Surface Methodology. Shorter mixing time (100 s) along with higher creaming time (400 s) was desirable for producing softer cookies with tender bite and higher spread factor. Cookie baked at 190 °C had superior quality in terms of hardness and spread factor as compared with those baked either at lower or at higher temperature. At lower baking temperature, hardness of cookie increased as the baking time was decreased below 14 min. Hardness also increased significantly with increase in water content at all levels of sugar concentration in the formula. Optimum cookie quality was obtained with creaming time of 400 s and mixing time 100 s to make cookie dough containing 59.65% sugar, 46.68% fat and 14% water. Cookie thickness 11 mm, baking temperature 190 °C and baking time of 16 min 30 s resulted in best cookies.

Effect of extrusion on thermal, textural and rheological properties of legume based snack.

Attempts have been made to improve dough handling properties and quality of legume based snack by incorporating extruded black gram (EBG) flour as partial substitute for raw black gram (RBG) flour. In present work overall quality improvement was achieved by analyzing (a) thermal properties of RBG and EBG flour (b) rheological properties (shear stress, shear rate, storage modulus, loss modulus, deflection angle and complex viscosity) of legume based snack dough and (c) post frying characteristics (colour and texture) of legume based snack. Three different legume based snack samples with different flour formulations (RBG flour, RBG flour incorporated with 25% EBG flour and RBG flour incorporated with 50% EBG flour) were prepared, characterized and compared with standard market sample. Dough exhibited shear thinning behaviour and G' and G″ showed rising behaviour with angular frequency whereas, complex viscosity showed decreasing behaviour. Herschel-Bulkley model was best fitted. Significant changes were observed in values of onset, peak and endset gelatinization temperatures on extraction of black gram flour which improved dough handling properties during papad processing and enhanced organoleptic profile of end product.

Dietary impact on esophageal cancer in humans: a review.

Cancer is the abnormal growth of cells that tend to proliferate in an uncontrolled way. About 32.6 million people in the world are affected by different types of cancer; 456 000 have esophageal cancer, which is the eighth most common cancer and the sixth most common cause of cancer-related deaths with a toll of 400 000 in 2012. About 80% of cases were reported from the less developed regions of the world. An incidence ratio of 2.4 : 1 for men and women reveals the gender disparity. Esophageal cancer is mainly of two types, namely, squamous cell carcinoma and adenocarcinoma. Most of the studies show a positive correlation of esophageal cancer with alcohol and tobacco consumption, but a negative correlation with fruit and vegetable intake. The type and amount of cereal, fat, meat and beverages consumed are also under study. Significant statistical synergistic interaction has been registered in studies considering the joint effect of the amount of beverage swallowed and its temperature, especially among heavy consumers. The role of non-nutritional components is gaining increasing attention because of their antioxidant, anti-inflammatory, anti-mutagenic and anti-carcinogenic properties. Socioeconomic status is another factor that cannot be ignored. Nevertheless, the predominant cause appears to be different in different regions, and in spite of the great advancements in the medical field, this still remains an enigma for researchers.

Citrus medica: nutritional, phytochemical composition and health benefits - a review.

Citrus medica (Citron) is an underutilized fruit plant having various bioactive components in all parts of the plant. The major bioactive compounds present are iso-limonene, citral, limonene, phenolics, flavonones, vitamin C, pectin, linalool, decanal, and nonanal, accounting for several health benefits. Pectin and heteropolysachharides also play a major role as dietary fibers. The potential impact of citron and its bioactive components to prevent or reverse destructive deregulated processes responsible for certain diseases has attracted different researchers' attention. The fruit has numerous nutraceutical benefits, proven by pharmacological studies; for example, anti-catarrhal, capillary protector, anti-hypertensive, diuretic, antibacterial, antifungal, anthelmintic, antimicrobial, analgesic, strong antioxidant, anticancerous, antidiabetic, estrogenic, antiulcer, cardioprotective, and antihyperglycemic. The present review explores new insights into the benefits of citron in various body parts. Throughout the world, citron has been used in making carbonated drinks, alcoholic beverages, syrup, candied peels, jams, marmalade, cordials, and many other value added products, which suggests it is an appropriate raw material to develop healthy processed food. In the present review, the fruit taxonomical classification, beneficial phytochemicals, antioxidant activities, and health benefits are discussed.

Effect of soaking and germination on physicochemical and functional attributes of horsegram flour.

Horsegram is an underutilized pulse, traditionally used for treating various disorders like kidney stones, diabetes and joint pain. The present study was undertaken to optimize the soaking and germination conditions, to decrease the anti-nutritional factors and at the same time maintaining the nutritional properties of horsegram. Horsegram seeds were soaked for 6, 12 and 18 h followed by germination for 0, 24 and 48 h under different illumination conditions i.e., light and dark respectively. The soaked and germinated samples were dried in laboratory drier at 55 °C until constant moisture was achieved and was further analyzed for various quality attributes. Almost all the physicochemical and functional characteristics were significantly affected by both soaking and germination, whereas, germination done in light and dark conditions, exerted significant effect on the ascorbic acid content, total protein, total phenols, antioxidant activity and tannin content only. Based on the quality attributes, it was found that treatment having 18 h soaking and 48 h germination in the presence of light was the best where maximum decrease in the anti-nutritional factors was observed. Moreover, there was an increase in ascorbic acid, total protein content and a decrease in the anti-nutritional factors such as oxalate and tannin content. Thus, it is concluded that 18 h soaking and 48 h germination in the presence of light can be considered as the optimum conditions to increase the nutritional content of horsegram flour, which can further be utilized for the preparation of different value-added food products.