Modulating Structure and Properties of Glutinous Rice Flour and Its Dumpling Products by Annealing

In this study, annealed glutinous rice flour treated under different conditions (ANN1, ANN2 and ANN3) were prepared. The structure as well as physicochemical characteristics of the flour and its dumpling products were investigated. The crystallinity of the annealed flour samples increased, while the hydration ability decreased. The content of bound water raised, and immobilized water as well as the freezing enthalpy value decreased for the fast-frozen dumplings made from annealed flour samples. It showed that annealed treatment could reduce the formation of large ice crystals, thus decrease the cracking of fast-frozen dumplings. The freezing enthalpy value of annealed dumplings decreased which was conducive to protect the structure and quality of products. The boiled dumplings made of annealed flour had better eating quality as demonstrated by the increase in the transmittance of the soup. It indicated that moderate annealed glutinous rice flour ANN2 had optimal physicochemical properties to make high quality dumplings. This study would pave the way for further study of the annealing glutinous rice flour and provide theoretical guidance for the application of annealing treatment in starchy food product.

Effect of New Frying Technology on Starchy Food Quality

Frying is commonly used by consumers, restaurants, and industries around the globe to cook and process foods. Compared to other food processing methods, frying has several potential advantages, including reduced processing times and the creation of foods with desirable sensory attributes. Frying is often used to prepare starchy foods. After ingestion, the starch and fat in these foods are hydrolyzed by enzymes in the human digestive tract, thereby providing an important source of energy (glucose and fatty acids) for the human body. Conversely, overconsumption of fried starchy foods can promote overweight, obesity, and other chronic diseases. Moreover, frying can generate toxic reaction products that can damage people’s health. Consequently, there is interest in developing alternative frying technologies that reduce the levels of nutritionally undesirable components in fried foods, such as vacuum, microwave, air, and radiant frying methods. In this review, we focus on the principles and applications of these innovative frying technologies, and highlight their potential advantages and shortcomings. Further development of these technologies should lead to the creation of healthier fried foods that can help combat the rise in diet-related chronic diseases.

ANALISIS KETERSEDIAAN PANGAN KOTA MALANG

The research purposes are analyzing food availability, food procurement diversity, and analyzing target formulation, procurement necessity, and food production in Malang in 2016 - 2019. The analysis used is Food Balance Sheet (FBS) and Food Desirable Dietary Pattern (FDDP). The analysis result shows that the food availability in Malang is dominated by plant food source with 81,75 % of percentages. The total of energy availability value is 2.227 kcal/kap/day and protein 63,77 gram/kap/day. The quality of food availability measured with FDDP is 89,33 which shows that food diversity is not maximal yet. Overall, the food availability energy in Malang has not fulfilled Recommended Dietary Energy (RDE) standard and the protein is more than Recommended Dietary Protein (RDP), in which RDE ideal is 2.400 kcal/kap/day and RDP is 63 gram/kap/day. RDE and RDP of ideal food availability can be reached by increasing and decreasing food commodity group gradually from 2016 to 2019. The food commodity groups that need to be increased are such as; cereals, pulse nut and oil seeds, animal food, vegetable, and fruit. While the commodity groups that need to be decreased are such as starchy food, nut, oil and fat, animal food, and sugar.

Studies on Bioethanol Production with Thermo Tolerant Yeast Isolates and their Co-Cultures using African Wild Cocoyam as Feedstock

In this work different ways of optimally producing bioethanol at various pH with thermotolerant yeasts and their cocultures using a non-human edible starchy food as feedstock was examined. African wild cocoyam, Xanthosoma roseum, sourced from abandoned farmlands in Obukpa, Nsukka, Nigeria was used as the substrate, while strains of Kluyveromyces marxianus and Pichia stipitis were used to ferment them. First the tubers were gelatinized by boiling under pressure above 100oC before hydrolysis with concentrated H2SO4. The hydrolysates were then fermented at 35oC with the thermotolerant yeasts for five days at different pH. Results obtained showed that gelatinized sample of the substrate gave optimum glucose yield when hydrolysed with 1M H2SO4 for 60 minutes. Kluyveromyces marxianus produced more ethanol than Pichia stipitis at all the four fermentation pH values tested. However, optimum ethanol production was obtained when the two yeast strains were used as coculture at pH 4.5. The peak time for ethanol production was 96 hours for the individual yeast cultures while that of their coculture was 72 hours. The results of the study indicated that wild cocoyam is an excellent feedstock for bioethanol production with many advantages including being non-edible, thereby eliminating concerns for food security, and containing high amount of carbohydrate. The study also revealed that fermenting sugar hydrolysates with a coculture of microorganisms during bioethanol production is a more efficient process than using individual cultures.

Nutritional habits and emotional eating of adults during social isolation days due to Covid-19 pandemic

Purpose: In this study, the effect of BMI values on eating habits and emotional eating of individuals in social isolation and quarantine process implemented in Turkey as a result of COVID-19 pandemic were investigated. Materials and methods: An online questionnaire was used in this cross-sectional study. A total of 2019 participants were included in the study between April and May 2020. Individuals' nutritional behaviors, emotional eating scores using the three-factor eating questionnaire stress level, appetite status, desire to eat desserts and anxiety about food access using a visual analog scale were evaluated with the questionnaire. Results: The study participated 1589 women and 430 men over the ages of 20. The obesity rate was 8.7% in women and 19.3% in men. There was a relationship between the stress score and the change in consumed food in women and in men. Involuntary weight changes were found significant in both men and women compared to BMI groups. Cereal and starchy food consumption were found to be related to BMI groups in men and women. It was determined that the average appetite levels and Emotional Eating Scale scores in both sexes were different between BMI groups. Conclusions: The findings show that the participants' eating habits have changed in quarantine-related social isolation. Emotional eating has increased in direct proportion with BMI, and involuntary weight gain has increased.

Evaluation of Various Starchy Foods: A Systematic Review and Meta-Analysis on Chemical Properties Affecting the Glycemic Index Values Based on In Vitro and In Vivo Experiments

The chemical properties that serve as major determinants for the glycemic index (GI) of starchy food and recommended low-GI, carbohydrate-based foods have remained enigmatic. This present work performed a systematic assessment of linkages between chemical properties of foods and GI, and selected low-GI starchy foods. The data were sourced from literature published in various scientific journals. In total, 57 relevant studies and 936 data points were integrated into a database. Both in vitro and in vivo studies on GI values were included. The database was subsequently subjected to a meta-analysis. Meta-analysis from in vitro studies revealed that the two significant factors responsible for the GI of starchy foods were resistant starch and phenolic content (respectively, standardized mean difference (SMD): −2.52, 95% confidence interval (95%CI): −3.29 to −1.75, p (p-value) < 0.001; SMD: −0.72, 95%CI: −1.26 to −0.17, p = 0.005), while the lowest-GI crop type was legumes. Subgroup analysis restricted to the crop species with significant low GI found two crops, i.e., sorghum (SMD: −0.69, 95%CI: −2.33 to 0.96, p < 0.001) and red kidney bean (SMD: −0.39, 95%CI: −2.37 to 1.59, p = 0.001). Meta-analysis from in vivo studies revealed that the two significant factors responsible for the GI of starchy foods were flavonoid and phenolic content (respectively, SMD: −0.67, 95%CI: −0.87 to −0.47, p < 0.001; SMD: −0.63, 95%CI: −1.15 to −0.11, p = 0.009), while the lowest-GI crop type was fruit (banana). In conclusion, resistant starch and phenolic content may have a desirable impact on the GI of starchy food, while sorghum and red kidney bean are found to have low GI.

Effect of cassava on proximate composition, insulin index, glycemic profile, load, and index in healthy individuals: a cross-sectional study

Background: The major challenge in Africa is the growing prevalence of metabolic syndrome which has been attributed to changing lifestyles in developing countries. The impact of the commonly available staple starchy food; eaten in this environment may also be a factor contributing to growing concerns of metabolic syndrome. Hence, the need to assess the affordable staple starchy foods. Cassava is the most consumed staple starchy food in our environment; therefore, our study evaluated its impact on glycaemic and insulin response in consumers.Aim: To determine Insulin Index (II), glycaemic profile (GP), glycaemic load (GL) and Glycaemic Index (GI), incremental glucose peak value (IGPV), and glycaemic profile index (GPI) of cassava food meals.Methods: Participants ingested three cassava processed products (cassava dough [fufu], chips [Abacha], and flakes [garri] (the equivalent of 50g glucose) and 50 g of reference meal (glucose solution). Fasting and post-prandial samples were taken for blood glucose and insulin however sample for glucose was taken at intervals of 30 mins to a maximum of 180mins and 120 mins for insulin, respectively.Result: The GI for cassava dough, flakes and chips were 93.26; 95.92 and 91.94, respectively. Their glycaemic load was 46.62; 47.96 and 45.97, respectively. The glycaemic profile index was 37.34; 41.41 and 46.19, respectively. In addition, the insulin index was 55.83; 69.36 and 97.02. The proximate analysis showed protein, moisture, fibre, fat, ash, and carbohydrate content as follows the cassava (%) (crude form) 1.075%; 72.00%; 0.80%; 0.58%; 0.35%; 25.07%, Chips 1.44%; 59.13%; 0.73%; 1.71%; 36.83%, flakes 1.82%; 67.36%; 0.15%; 0.91%; 0.25%; 39.64% and dough 1.56%; 67.51%; 0.21%; 0.52%; 0.20%; 30.22% respectively.Conclusion: II, GP, GL, and GI of cassava dough (fufu), cassava flakes(garri)and cassava chips (Abacha) were found to be high. Unregulated dietary intake in adults may lead to metabolic diseases.Keywords: Glycaemic index, Glycaemic load, Glycaemic profile, Cassava, Makurdi

Comparative Analysis of Nutrients Content and Characterization of Oil from Two Varieties of Tiger Nut (Cyperus esculentus)

Background: Tiger nut (Cyperus esculentus) belong to the family of Cyperaceae and the order of Commelinalis. It has been existing for more than 4,000 years ago. Objective: To determine the nutritional composition (protein, fat, fiber, ash, moisture and carbohydrate) of nut, to extract and characterize oil from varieties of tiger nuts, to determine the mineral elements presence in the nut. Study Design: A descriptive research design was adopted by this study to determine the nutritional composition (protein, fat, fiber, ash, moisture and carbohydrate) of nut, to extract and characterize oil from varieties of tiger nuts and to determine the mineral elements presence in the nut. Place and Duration of the Study: The study was conducted at Biochemistry Department, Bayero University Kano, between April, 2019 to September, 2019. Methods: The Proximate compositions were determined using the method describe by Association of official analytical chemist’s, while Carbohydrate were determined by difference. The physicochemical properties were determined using the method describe by American oil Chemist’s society and Mineral composition were determined. Results: The proximate composition of the yellow variety was moisture (9.48%), ash (2.07%), fat (33.5%), protein (6.11%), crude fibre (17.5%) and carbohydrate (31.2%). Corresponding values of the brown variety was moisture (9.62%), ash (2.76%), fat (34.2%), protein (6.93%), crude fibre (15.3%) and carbohydrate (30.9%) respectively. The extracted oil has a golden colour and a nutty taste. The saponification, acid, peroxide, iodine and free fatty acid values of the yellow variety were found to be 210.8±4.28, 3.17±0.64, 1.00±0.52, 78.7±13.1 and 0.40±0.21 and the saponification, acid, peroxide, iodine and free fatty acid values of the yellow variety were also found to be 212.2±4.92, 3.36±0.56, 1.06±0.75, 76.5±14.6 and 0.42±0.04 and was not significantly (P> 0.05) different between th yellow and brown varieties respectively. The mineral element (mg/100g) of the brown variety is Mg 133.67, P 527.33, K 957.67, Ca 394, Cu 2.0 and Fe 1.86. Corresponding values for the yellow variety are Mg 118.13, P 159.61, K 384.33, Ca 152, Cu 2.0 and Fe 1.04. Lead and Cadmium were not detected in both varieties. Conclusion: These results indicate that tiger nut tuber oil could be a good source of edible oil, highly nutritive and can provide a lot of energy like some starchy food.