The impact of addition of pearl millet starch-germ complex in white bread on nutritional, textural, structural, and glycaemic response: Single blinded randomized controlled trial in healthy and pre-diabetic participants.

The rise of pre-diabetes at the global level has created a significant interest in developing low glycaemic index food products. The pearl millet is a cheaper source of starch and its germ contains significant amount of protein and fat. The complexing of pearl millet starch and germ by dry heat treatment (PMSGH) resulted an increase in the resistant starch content upto 45.09 % due to formation of amylose-glutelin-linoleic acid complex. The resulting pearl millet starch germ complex was incorporated into wheat bread at 20, 25, and 30 %. The PMSGH incorporated into bread at 30 % reduced the glycaemic index to 52.31. The PMSGH incorporated bread had significantly (p < 0.05)increased in the hardness with a reduction in springiness and cohesiveness. The structural attributes of the 30 % PMSGH incorporated bread revealed a significant (p < 0.05)increase in 1040/1020 cm-1 ratio and relative crystallinity. The consumption of functional bread incorporated with pearl millet starch germ complex reduced blood glucose levels and in vivo glycaemic index in healthy and pre-diabetic participants when compared to white bread. Hence, the study showed that the incorporation of pearl millet starch-germ complex into food products could be a potential new and healthier approach for improving dietary options in pre-diabetes care.

LDPE-Natural Rubber Composite Film as Active Packaging: A Paradigm Shift in Oxygen Scavengers.

Oxygen scavenging films, an emerging type of active packaging, play a crucial role in preserving the freshness and quality of food products. In this study, we proposed an extruded film made of low-density polyethylene (LDPE) with 5% natural rubber (NR) as the oxygen scavenging film. Characterization of the film revealed that its morphological and barrier properties remained intact, while the elongation attribute was enhanced. The obtained film was standardized for activation scavenging kinetics by varying the UV dose (time and distance). At the optimal UV dose, the film exhibited a total scavenging capacity of 61 cc/g. To assess the film's functionality, FTIR spectra were analyzed before and after exposure to oxygen, confirming the film's ability to scavenge oxygen based on observed peaks at 1718 and 3425 cm-1. Considering that bread and khoa (fatty food) are sensitive to oxygen, they were selected for testing the application of the oxygen scavenging film. Sensory analysis of bread samples, including appearance and mold formation, as well as microbial load studies, indicated that the shelf life of bread increased from 2-3 days (control) to 4-5 days when packed in the NR-based film and stored at 27 ± 2 °C. Similarly, when applied to khoa, the film extended its shelf life by 3 days compared to the control while maintaining sensory attributes and preserving nutritional value, such as fatty acids. In general, the developed oxygen scavenging film effectively prevents the detrimental effects of oxygen on food products, leading to an extension of their shelf life. This has significant implications for the food industry, as it helps mitigate the negative consequences of oxygen exposure and enhances the product shelf life.

Hydrothermal treatment of hemp seeds (Cannabis sativa L.): impact on its dehulling yield, fatty acid profile and nutritional characteristics.

BACKGROUND: Hemp seeds are highly nutritious and a sustainable source of protein and omega-fatty acids. The outer shell of the seeds restricts its utilization in the food industry. Dehulling of the seeds leads to a lot of processing losses due to high oil content and hard shell of the seed. Therefore, in the present study, hydrothermal treatment of the hemp seeds (Cannabis sativa L.) before dehulling was proposed to reduce the endosperm breakage and improve dehulling yield of seeds. RESULT: The hemp seeds were subjected to four types of treatments, namely moisture addition (at 14%) with tempering for 10 min and 60 min followed by drying (28-30 °C) and steaming at atmospheric pressure for 5 min and 10 min. Results from the study showed that the hydrothermal treatments impacted the hardness of the endosperm and therefore improved the dehulling yield by 1.3 to 1.5 folds. Also, the dehulling losses significantly reduced from 26.80% to 9.52% after the steaming treatments. Though steaming to some extent affected the colour of the dehulled seeds compared to other treatments, it showed an increment in protein digestibility from 86.53% to 88.73%. CONCLUSION: Among all the hydrothermal treatments, steaming showed significant improvement in the yield of dehulled hemp seeds. It reduced endosperm breakage without affecting the seeds' fatty acid profile and nutritional quality. It can be concluded that steaming as a pretreatment can be used for improved dehulling of hemp seeds, aiding the better valourization of hemp seeds in the food industry. © 2022 Society of Chemical Industry.

Nutritional evaluation of Sphenostylis stenocarpa flour, its bread and effect of additives.

Abstract: The present research sought to experiment the effect of additives such as dry gluten powder (DGP), fungal α-amylase (FAA), sodium stearoyl-2-lactylate (SSL) and their combination (GAS) on the rheological and nutritional profile of bread. The incorporation of varied percentage (0-20%) of stenostylis stenocarpa flour (ssF) into WF(Wheat Flour) was optimized at 15%. The results showed that the incorporation of 15% ssF decreased the farinograph dough stability and extensograph resistance to extension. There was protein matrix disruption in 15% ssF dough contrary to 15% ssF + GAS dough as shown in scanning electron micrograph (SEM). However, the addition of GAS to 15% ssF produced bread with an improved quality score that competed favourably with control bread. The organoleptic evaluation revealed an overall quality score of 52.5, 40 and 49% for control, 15% ssF and 15% ssF + GAS bread respectively. Furthermore, 15% ssF + GAS revealed a higher value of ash, protein, dietary fibre, total phenol contents and IC50 of DPPH radical scavenging activity in comparison to control bread. Hence, the present study showed that partial replacement of WF with 15% ssF + GAS has a positive effect on the overall sensorial acceptability and nutritional value of bread.

Structural, Culinary, Nutritional and Anti-Nutritional Properties of High Protein, Gluten Free, 100% Legume Pasta.

Wheat pasta has a compact structure built by a gluten network entrapping starch granules resulting in a low glycemic index, but is nevertheless unsuitable for gluten-intolerant people. High protein gluten-free legume flours, rich in fibers, resistant starch and minerals are thus a good alternative for gluten-free pasta production. In this study, gluten-free pasta was produced exclusively from faba, lentil or black-gram flours. The relationship between their structure, their cooking and Rheological properties and their in-vitro starch digestion was analyzed and compared to cereal gluten-free commercial pasta. Trypsin inhibitory activity, phytic acid and α-galactosides were determined in flours and in cooked pasta. All legume pasta were rich in protein, resistant starch and fibers. They had a thick but weak protein network, which is built during the pasta cooking step. This particular structure altered pasta springiness and increased cooking losses. Black-gram pasta, which is especially rich in soluble fibers, differed from faba and lentil pasta, with high springiness (0.85 vs. 0.75) and less loss during cooking. In comparison to a commercial cereal gluten-free pasta, all the legume pasta lost less material during cooking but was less cohesive and springy. Interestingly, due to their particular composition and structure, lentil and faba pasta released their starch more slowly than the commercial gluten-free pasta during the in-vitro digestion process. Anti-nutritional factors in legumes, such as trypsin inhibitory activity and α-galactosides were reduced by up to 82% and 73%, respectively, by pasta processing and cooking. However, these processing steps had a minor effect on phytic acid. This study demonstrates the advantages of using legumes for the production of gluten-free pasta with a low glycemic index and high nutritional quality.

Current food classifications in epidemiological studies do not enable solid nutritional recommendations for preventing diet-related chronic diseases: the impact of food processing.

To date, observational studies in nutrition have categorized foods into groups such as dairy, cereals, fruits, and vegetables. However, the strength of the association between food groups and chronic diseases is far from convincing. In most international expert surveys, risks are most commonly scored as probable, limited, or insufficient rather than convincing. In this position paper, we hypothesize that current food classifications based on botanical or animal origins can be improved to yield solid recommendations. We propose using a food classification that employs food processes to rank foods in epidemiological studies. Indeed, food health potential results from both nutrient density and food structure (i.e., the matrix effect), both of which can potentially be positively or negatively modified by processing. For example, cereal-based foods may be more or less refined, fractionated, and recombined with added salt, sugars, and fats, yielding a panoply of products with very different nutritional values. The same is true for other food groups. Finally, we propose that from a nutritional perspective, food processing will be an important issue to consider in the coming years, particularly in terms of strengthening the links between food and health and for proposing improved nutritional recommendations or actions.

Roller milling process for fractionation of fenugreek seeds (Trigonella foenumgraecum) and characterization of milled fractions.

The fenugreek seed is the richest source of soluble and insoluble fiber and also known for its medicinal and functional properties. The major objective of this present study is fractionation of the fenugreek by roller milling method and characterization of roller milled fractions. The effects of moisture conditioning on fenugreek roller milling were studied using standard methods. The results observed were increase in coarse husk from 33.75-42.46 % and decrease in flour yield from 49.52-41.62 % with increase in addition of moisture from 12-20 %. At 16 % conditioning moisture, the yield of coarse husk was 40.87 % with dietary fiber and protein content of 73.4 % and 6.96 % respectively. The yellowness value (b) for the coarse husk (29.68) found to be lowest at 16 % conditioning moisture compared to the other coarse husk samples, showing maximum clean separation. The fiber fractions showed the viscosity of 6,392 cps at 2 % w/v concentration. The flour fraction was higher in protein (41.83 %) and fat (13.22 %) content. Roller milling process of fenugreek was able to produce > 40 % of coarse husk with 73.4 % dietary fiber (25.56 % soluble & 47.84 % insoluble) and > 48 % flour with 41.83 % protein content, where as the whole fenugreek contained 22.5 % protein & 51.25 % dietary fiber. Thus roller milling has proved to be a valuable method for the fractionation of fenugreek to obtain fiber and protein rich fractions.

Rheology, fatty acid profile and storage characteristics of cookies as influenced by flax seed (Linum usitatissimum).

Flaxseed is a versatile functional ingredient owing to its unique nutrient profile. Studies on the effect of substitution of roasted and ground flaxseed (RGF) at 5, 10, 15 and 20% level on the wheat flour dough properties showed that amylograph peak viscosity, farinograph dough stability, extensograph resistance to extension and extensibility values decreased with the increase in the substitution of RGF from 0-20%. The cookie baking test showed a marginal decrease in spread ratio but beyond substitution of 15% RGF the texture and flavour of the cookies was adversely affected. The data on storage characteristics of control and cookies with 15% RGF showed no significant change with respect to acidity of extracted fat and peroxide values due to storage of cookies upto 90 days in metallised polyester pouches at ambient conditions. The gas chromatographic analysis of fatty acid profile indicated that the control cookies contained negligible linolenic acid and the flaxseed cookies contained 4.75 to 5.31% of linolenic acid which showed a marginal decrease over storage. Hence flaxseed could be used as a source of omega-3-fatty acid.