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.

Standardization and quality profile of sattu mix.

Wheat (T1) and maize (T2) based sattu were formulated using chick pea, barley and other food adjuncts. Results revealed that, no significant difference was observed in the protein and ash content between control (chickpea basede sattu mix) and T1. However, significant difference was observed between the control and T2 sample between moisture, fat, insoluble and total fiber, with the exception of protein, soluble fiber and ash. In case of T1 and T2, significant difference was observed in fat and total fiber content. Coming on to the mineral composition, significant difference was observed between the mineral content in control and T1, with respect to calcium, potassium, sodium, magnesium, iron, manganese and copper. In case of control and T2, significant difference was observed with respect to calcium, potassium, sodium, magnesium, iron and copper, with the exception of manganese. Coming on to the mineral content of both the formulations, significant difference was observed with respect to all the minerals estimated. Significant difference was observed in the total amylose content between control and formulated samples on 0, 30 and 60 days. Microstructural studies of raw and roasted sattu and its ingredients by observation under scanning electron microscope revealed that substantial structural changes occurred during processing. The raw grains were tightly packed and contained no air spaces. However, a large number of air spaces are formed in the cotyledon of the roasted grain sample. It was observed that, T1and T2 had medium GI value (56 and 58% respectively), Whereas for control it was 60%. The formulated samples were found to be shelf stable for 60 days at RT, with an increase in moisture content of 4-6%. All the samples were sensorial acceptable and there was no perceptible off odor or off taste.