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Rohu fish (Labeo rohita) fillets were coated with 2.5% to 25% soy protein isolate (SPI) to evaluate their ability to reduce fat uptake. The coating pickup of fish fillets increased with increasing coating concentration. Fillets coated with 15% SPI showed the highest coating pickup value of 18.29% and reduced fat uptake by 57.78%. As revealed by lowered carbonyl and sulfhydryl contents, SPI coating protected proteins from oxidation during deep-frying. Increasing coating concentration decreased the hardness, chewiness, and cutting force of coated fish fillets. Therefore, the aforesaid coatings could be recommended for making low-fat fried fish fillets with 15% SPI. [ABSTRACT FROM AUTHOR]

Fried instant noodles have become a popular instant food in recent years, favored by consumers for their unique flavor and taste. Unfortunately, the oil content of instant noodles is generally high, so the rise of fat‐related diseases poses a major health issue. From the perspective of the cost of instant noodle manufacturers and the health of consumers, it is of great significance to reduce the oil content of instant noodles. The aim of this review article is to provide an overview of the main factors, such as raw materials and production processes, affecting oil content in instant noodles in order to suggest specific strategies to reduce the oil content in the end product. From the literature reviewed, adding acetylated potato starch/carboxymethyl cellulose, hydroxypropyl methylcellulose, or preharvest‐dropped apple powder in the noodle formulation could be a better choice to reduce oil uptake by 5%–20%. Instant noodles with lower oil content can be produced using novel alternative frying technologies, including microwave and vacuum frying. The proper management of the production processes and the implementation of enhancement strategies may result in a reduction of oil content in the end product. [ABSTRACT FROM AUTHOR]

More than 70% of American adults are overweight or obese, a precondition leading to chronic diseases, including diabetes and hypertension. Among other factors, diets with high fat and carbohydrate content have been implicated in obesity. In this study, we hypothesize that the choline and geranate (CAGE) ionic liquid can reduce body weight by decreasing fat absorption through the intestine. In vitro studies performed using docosahexaenoic acid (DHA), a model fat molecule, show that CAGE forms particles 2 to 4 μm in diameter in the presence of fat molecules. Ex vivo permeation studies in rat intestine showed that formation of such large particles reduces intestinal fat absorption. In vivo, CAGE reduces DHA absorption by 60% to 70% compared with controls. DHA administered with CAGE was retained in the intestine even after 6 h. Rats fed with a high-fat diet (HFD) and 10 μL of daily oral CAGE exhibited 12% less body weight gain compared with rats fed with an HFD without CAGE for 30 d. Rats that were given CAGE also ate less food than the control groups. Serum biochemistry and histology results indicated that CAGE was well tolerated by the rats. Collectively, our data support the hypothesis that CAGE interacts with fat molecules to prevent their absorption through intestinal tissue and potentially providing a feeling of satiety. We conclude that CAGE offers an effective means to control body weight and a promising tool to tackle the obesity epidemic. [ABSTRACT FROM AUTHOR]

Sweet potato is a unique high-calorie food because it is an excellent source of some essential micronutrients, such as provitamin A (β-carotene). The quality of par-fried frozen sweet potato products is impacted by several factors that have not been well researched, such as freezing rate and surface modification. In this study, our objective was to evaluate the effect of freezing rate (at -20°C, -30°C, -40°C, and -60°C), surface pretreatment including blanching and gum coating (methylcellulose, sodium alginate, or mixed gums), sample dimensions (strips or slices), and cultivar (Covington and Murasaki) on several quality attributes of fried sweet potato. Based on our study, frying at 180°C yielded the lowest oil content among the tested temperatures. Compared with Covington samples, Murasaki strips coated with mixed gums produced fried samples that were significantly (p ≤ 0.05) lower in fat uptake (10.84%), less porous (35.5%), crispier (maximum force = 6.90 N), lighter, less red, and yellower. Higher freezing rate, 5.12°C min-1 (at -60°C), showed significantly lower fat content, and lower lightness or yellowness than lower freezing rates. Frying at 180°C significantly reduced vitamin C and β-carotene levels from 3.75 mg and 349.27 μg per 100 g to 1.92 mg and 105.99 μg per 100 g, respectively. X-ray micro-computed tomography showed a significant decrease in porosity because of high freezing rates. The general conclusion is that faster freezing rate is better for par-fried sweet potato quality preservation. [ABSTRACT FROM AUTHOR]

Abstract Background Deep-fat frying is a common cooking method where fat or oil is used as the heat transfer medium, in direct contact with the food at a temperature above the boiling point of water. During the deep fat frying method, oil not only serves as a heating medium but also absorbs into food, increasing the total fat content. As a result, consumption of deep-fat fried foods has been associated with coronary heart diseases, obesity and type 2 diabetes. Selection of an appropriate food coating before frying may act as a barrier to moisture loss, which is important commercially, and also reduce fat uptake during frying. Scope and approach This paper succinctly reviews different protein sources for edible coatings and compare them with muscle food proteins which were used in deep-fat fried foods. Key findings and conclusions Protein-based coatings have been explored as potential coating materials in fat-uptake reduction. Comparatively, proteins are able to form films with better mechanical and barrier properties than polysaccharides. Application of muscle food proteins (myofibrillar proteins) as coatings, which are rich in these proteins, is novel and could be product-friendly for deep-fried muscle foods. Highlights • Consumption of deep-fat fried foods has been associated with health issue. • Various edible coatings have been used to reduce fat-uptake in deep-fat fried foods. • Muscle protein-based coating may provide a better reduction in fat uptake. [ABSTRACT FROM AUTHOR]

A comparative analysis of quality attributes (moisture, fat, color, and relaxation modulus) of French fries was performed between conventional and microwave frying. Experiments were performed in triplicate for both frying operations at temperatures of 177, 185, and 193 °C for frying times of 60, 90, and 120 s. The real-time pressure and temperature profiles at above conditions indicated that during microwave frying, gage pressure had greater magnitudes that lasted longer, and the temperature increased to boiling point of water faster in comparison to conventional frying. Lower magnitude of negative pressure during microwave frying is expected to have caused lower fat content in fries obtained using this method (0.08 g/g solids less at 185 °C and 0.07 g/g solids less at 193 °C) than conventional frying. The lightness parameter ( L*) decreased to a lesser extent in microwave frying than in conventional frying. The stress relaxation function of the French fries were significantly different between the 2 frying operations. Consumer test confirmed that reduced fat uptake during microwave frying did not compromise with desirable quality attributes of French fries. X-ray micro-computed tomography scanning provided complementary understanding about differences in microstructural properties of fries made using microwave and conventional frying. [ABSTRACT FROM AUTHOR]

Superheated steam drying ( SSD) was used as a prefrying treatment prior to deep-fat frying for potato slices. The effect of SSD at 130, 150 or 180 °C and steam velocity of 2.0 m s−1 on the fat uptake, colour and texture of fried potato chips was evaluated; microstructure and degree of starch gelatinization were also evaluated to help explain the fat uptake results. SSD and frying yielded potato chips with the fat content from 0.263 ± 0.002 to 0.304 ± 0.002 kg kg−1 (d.b.), while frying without SSD led to chips with the fat content as high as 0.359 ± 0.003 kg kg−1 (d.b.). SSD did not promote starch gelatinization. Lower fat uptake was correlated to modified surface structure and lower moisture content of potato slices prior to frying. Frying with/without SSD pretreatment yielded potato chips of similar hardness, crispness and lightness. On the other hand, SSD significantly increased redness and yellowness of the fried chips. [ABSTRACT FROM AUTHOR]

Fat uptake and the characteristic crispy and crunchy texture are the main quality parameters of fried potato products such as the most popular French fries and potato crisps. They are formed during the frying process and depend on different factors, among which frying oil properties and frying conditions were taken under investigation. Quality of frying oils as well as fatty acid composition and degree of degradation affect fat uptake and texture of fried potato products. Technological parameters such as frying temperature and frying conditions were also considered. Practical applications: Factors affecting fat uptake and texture of fried potato products such as French fries and potato crisps are discussed. The kind and quality of frying medium as well as frying parameters (temperature, using vacuum) influence fat uptake and texture of fried products. Texture of fried potato products is correlated with fat content and composition of frying medium. Higher frying temperature decreases hardness of French fries and potato crisps, which exhibit more crispy and delicate texture in comparison with products fried at lower temperatures. [ABSTRACT FROM AUTHOR]

Wheat flour-microparticulated wheat bran (MWB) mixture and composites were prepared, and their potential as an oil repellent was evaluated in doughnuts. As MWB content increased, the oil-holding capacity decreased, and there were significant changes in water-holding capacity ( p < 0.05). As MWB content increased, the fat content of doughnuts decreased. In addition, the wheat flour-MWB composite was more effective for preventing fat uptake than the wheat flour-MWB mixture. The hardness of the composite was higher than the mixture, although volume and weight decreased and surface colour became darker than that of the mixture. As the proportion of wheat bran in the doughnut formulation increased, the inner crust achieved a uniform cell size and cellular integrity was improved. Based on these data, wheat flour-MWB composites are appropriate for use in doughnut formulas with low fat uptake. [ABSTRACT FROM AUTHOR]

Abstract: The objective of this study has been to investigate the effects of two ingredients i) acetylated potato starch (APS) and ii) sodium carboxymethyl cellulose (CMC) on the textural attributes and eating quality of instant noodles. Using low-protein soft wheat flour (Australian Soft) as the base material, samples of noodles incorporating varying proportions of APS and CMC were evaluated for product texture, colour and fat uptake. The variables were studied using a central composite design and textural characteristics were assessed using the TA-XT2, colour by the Minolta Chroma Meter. The results were analyzed by response surface methodology and showed that the two variables enhance the hardness and reduce adhesive values of cooked instant noodles. Electron microscopy also demonstrated the development of a more continuous network structure within the noodles. The addition of CMC had weakened the noodle inner structure and reduced the cohesiveness values of the cooked instant noodles. In contrast, APS provides hardness but does not affect cohesiveness. Marginal observable difference was found in product colour for the various treatment combinations, with a slightly dull appearance, viz less white and less yellow compared with the control. Trials to produce the lowest fat uptake rating indicated that 10% APS was optimal. The results may provide a basis for modifying formulations for use with low-protein soft wheat flours to provide eating quality and colour attributes to meet the preferences of specific customer groups. The conclusion of this study is that the combined use of APS and CMC primarily affects the textural attributes of hardness and adhesiveness rather than the other quality parameters of instant noodle that have been assessed. In addition, APS has the potential to enhance the performance of low-protein soft wheat flours for instant noodle manufacture. [Copyright &y& Elsevier]

The main aim of this study was to investigate the influence of different coating materials, either alone or in combination, on fat uptake that occurred during deep-frying of minced chicken meat-balls. The data obtained showed that coatings made from whey protein isolate, carrageenan or starch all reduced the relative variation in fat-uptake and gave better results in this respect than a coating of breadcrumbs or a non-coated control. There was no effect of any coating material, or combination of materials, on the texture of the product or its density. All samples were found to be acceptable by a trained sensory panel, although there were small differences in sensory scores between some of the coating treatments that were statistically significant (P ≥ 0.05). [ABSTRACT FROM AUTHOR]

In the present study, we examined the composition, amount, and uptake of yolk nutrients [fat, protein, water, and carbohydrates (COH)] during incubation of eggs from 30and 50-wk-old broiler breeder hens. Eggs were sampled at embryonic d 0 (fresh eggs), 13, 15, 17, 19, and 21 (hatch). Egg, embryo, yolk content, and yolk sac membrane were weighed, and the yolk sac (YS; i.e., yolk content + yolk sac membrane) composition was analyzed. From 30 to 50 wk of age, the albumen weight increased by 13.3%, whereas the yolk increased by more than 40%. The proportion of fat in the fresh yolk of the 30-wk-old group was 23.8% compared with 27.4% in the 50-wk-old group, whereas the proportion of protein was 17.9% compared with 15.6%, respectively. During incubation, results indicated that water and protein infiltrated from other egg compartments to the YS. Accordingly, the calculated change in the content of water and protein between fresh yolk and sampled YS does not represent the true uptake of these components from the YS to the embryo, and only fat uptake from the YS can be accurately estimated. By embryonic d 15, fat uptake relative to embryo weight was lower in the 30-wk-old group than in the 50-wk-old group. However, by embryonic d 21, embryos of both groups reached similar relative fat uptake, suggesting that to hatch, embryos must attain a certain amount of fat as a source of energy for the hatching process. The amount of COH in the YS increased similarly during incubation in eggs from hens of both ages, reaching a peak at embryonic d 19, suggesting COH synthesis in the YS. At hatch, the amount of protein, water, and COH in the residual YS, relative to the weight of the yolk-free chick, was similar in eggs from young arid old hens. However, chicks from the younger hens had less fat in the YS for their immediate posthatch nutrition compared with those from the older hens. [ABSTRACT FROM AUTHOR]

This study investigated the use of whey protein, as an additional coating, in combination with basic, well-described predust, batter, and breading ingredients, for fat-uptake reduction in fried chicken. Chicken breasts were cut into strips (1 × 5 × 10 cm) and coated with wheat flour (WF) as a predust, dipped in batter, coated with WF as a breading, then dipped in 10% denatured whey protein isolate (DWPI) aqueous solution (wet basis). A WF-batter-WF treatment with no DWPI solution dip was included as a control. Coated chicken strips were deep-fried at 160 °C for 5 min. A Soxhlet-type extraction was performed to determine the fat content of the meat fraction of fried samples, the coating fraction of fried samples, raw chicken, and raw coating ingredients. The WF-batter-WF-10% DWPI solution had significantly lower fat uptake than the WF-batter-WF control, by 30.67% (dry basis). Practical Application: This article describes applied research involving fat reduction in coated deep-fried chicken. The methods used in this article were intended to achieve maximized fat reduction while maintaining a simple procedure applicable to actual food processing lines. [ABSTRACT FROM AUTHOR]

Abstract: This study examined the influence of soybean hull-coated frying batter composite on fat uptake during deep fat frying. Soybean hull was microparticulated by impact mill at impact mill speed (IMS) of 6000, 10,000 and 14,000rpm, and air-classified into coarse and fine fractions at Air Classifying Wheel Speed (ACWS) of 4000, 8000 and 12,000rpm, respectively. Each soybean hull was dry-coated into wheat flour by dry particle coating system. As the difference in particle size between wheat flour and soybean hull got larger, the coating process became more effective, which indicates the size difference between wheat flour and soybean hull was important for coating effectiveness. When the ratios of wheat flour to soybean hull were 99:1 and 95:5, there were about 3.3(g/100g) and 24.4(g/100g) of fat content reduction, respectively. Inner crust structures showed slight reduction in cell size and improved cellular integrity with shrinkage in the cell membrane, with increase in soybean hull content. This means soybean hull can form a protective layer and can be applied to the food industry as a frying batter composite to reduce fat uptake. [Copyright &y& Elsevier]

The uptake of lipid into French fries was investigated using two varieties of potato ('Russet Burbank' and 'Agria') and the New Zealand sweet potato, Ipomoea batatas, (kumara). The variety of potato used had a significant effect on lipid uptake, with 'Agria' having the lowest lipid content. The different cellular structures may have affected the fat uptake in the French fries by influencing either the loss of moisture during finish-frying or the damage done to the original anatomy during processing before pre-frying. The French fries that had undergone frozen storage had a higher amount of lipid contained in their inner core than did those that had been either chilled or prepared freshly for frying. [ABSTRACT FROM AUTHOR]

Abstract: The effect of a microwave pretreatment at different time duration on the mass transfer of chicken nuggets during deep-fat frying was studied. Coated chicken nugget samples pretreated in a microwave oven for 1–2min were fried at 160°C for times ranging from 0 to 300s to evaluate the mass transfer as compared to the samples without a microwave pretreatment. Microwave pretreatment had a significant effect on moisture loss and oil uptake of chicken nuggets during deep-fat frying. [Copyright &y& Elsevier]