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Subject: search.filters.subject.Instant rice

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    Varieties and cooking conditions difference in quality of instant brown rice
    (2024-10-01)
    Loan, L. T.K.
    ;
    Vinh, B. T.
    ;
    Tai, N. V.
    Amylose content is an important indicator that determines the hardness and softness of rice, which depends on rice varieties. Three types of specialty colored rice in Vietnam were selected for research on instant rice production including DH6 brown rice (DH6), Huyet Rong rice (HR), and Cam Cai Lay rice (CL). Proximate compositions and antioxidant properties such as total anthocyanin and total phenolic content in three kinds of rice were analyzed and compared. In addition, the effect of varieties and ratios of rice and water on the cooking time, volume expansion, antioxidant compounds and sensory properties were observed. The results showed that varieties led to differences in the nutritional profile of rice. CL and HR have the highest anthocyanin content (54.9-56.5 mg/100 g). DH6 brown rice is considered as the low amylose rice, with the content of amylose about 4.6%. Besides, it was also found that using “Cam Cai Lay” rice could create products with good structure and high sensory value. The results also confirmed that the product is of good quality when using a ratio of rice: water 1:2 and a cooking time of 30 mins. Types of rice and cooking conditions remarkably affected the quality of instant rice, which could further optimize for the up-scale process.
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    INSTANT GERMINATED VD20 RICE CULTIVATED IN VIETNAM: EFFECT OF COOKING CONDITIONS
    (2024-01-01)
    Loan, Le Thi Kim
    ;
    Tat, Truong Quoc
    ;
    Minh, Pham Do Trang
    ;
    Thao, Vo Thi Thu
    ;
    Hoang, Pham Thi Minh
    Instant rice is ideal for convenient use as a low-moisture, lightweight ration and emergency food in our fast-paced lifestyle. It has a longer shelf life and can be quickly rehydrated. This study examined the impact of various cooking circumstances, such as the ratio of rice to water and the kind and concentration of food additives, on the physical and sensory characteristics of quick germinated VD20 rice. Using the correct ratio of rice to water could decrease the percentage of broken cooked grains, increase porosity and volume expansion, and improve customer satisfaction. The study revealed that germinated VD20 rice cooked with a water-to-rice ratio of 1:2 had superior sensory qualities, as well as an appealing appearance when compared to both cooked and quick rice. Furthermore, the notable impact of food additives, specifically sodium bicarbonate and sodium chloride, on the characteristics of instant rice was noticed. Sodium bicarbonate adversely affects the organoleptic characteristics and causes structural damage and dark yellowing in instant rice. In a theoretical sense, the addition of 0.5% NaCl as a supplement can improve the physical characteristics of rice, resulting in instant rice with a well-formed structure and a higher rate of acceptance compared to the control sample which does not contain any food additives. This study is the first to explore the manufacturing of instant rice from germinated products. It aims to provide fundamental knowledge for future research on utilizing the high nutritional value of these sources and optimizing the production process.
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    Effect of oil addition on in vitro starch digestibility and physicochemical properties of instant rice
    (2018-12-01)
    Luangsakul, N.
    ;
    Ritudomphol, O.
    The most varieties of rice have high starch digestibility and glycemic index (GI), which is unsuitable for diabetics. The processes involved in the production of instant rice, not only make it more convenient for the consumer, but can also lower its starch digestibility and GI through the decrease in enzymatic accessibility to rice kernels. One way to control the enzymatic digestion of rice was increasing the amylose-lipid complex formation. The effect of oil addition during rice cooking on in vitro starch digestibility, GI and some physicochemical properties (thermal properties, X-ray diffraction patterns and pasting properties) of instant rice wasc studied. During rice cooking, 2 type of cooking oil, including coconut oil (C) and rice bran oil (R) at 2.5, 5 and 7.5% (w/w, on the basis of uncooked rice) were added to Sao Hai rice (SH), which had amylose content of 21.35 g/100g (dry weight basis, db). Thermal properties showed amylose-lipid complex dissociation peaks when rice was cooked with oil, and the highest enthalpy was found in the addition of oil at 2.5%. In X-ray diffraction patterns, cooked rice with oil which showed A+V type crystalline structure and the addition of rice bran oil at 2.5% exhibited the highest relative crystallinity (19.98%). The formation of amylose-lipid complex of cooked rice with oil reduced in vitro starch digestibility and eGI compared to cooked rice without oil. The addition of rice bran oil at 2.5% had the highest slowly digestible starch (SDS) and resistant starch (RS) contents, which were consistent with their lowest estimated glycemic index (eGI). The addition of oil to rice resulted in a lower peak viscosity (PV) and setback (SB), as compared to instant rice without oil.