‘Weak gel’ properties of khan flour from Belschmiedia sp.—a traditional food thickener from tropical West Africa

1995 ◽  
Vol 9 (3) ◽  
pp. 165-172 ◽  
Author(s):  
R. Ndjouenkeu ◽  
J.O. Akingbala ◽  
R.K. Richardson ◽  
E.R. Morris
2013 ◽  
Vol 80 (2) ◽  
pp. 138-143 ◽  
Author(s):  
Jayani Chandrapala ◽  
Bogdan Zisu ◽  
Sandra Kentish ◽  
Muthupandian Ashokkumar

Gelation is a significant operation in dairy processing. Protein gelation can be affected by several factors such as temperature, pH, or enzyme addition. Recently, the use of ultrasonication has been shown to have a significant impact on the formation of whey protein gels. In this work, the effect of ultrasonication on the gelation of casein systems was investigated. Gels were formed by the addition of 7·6 mm Tetra Sodium Pyro Phosphate (TSPP) to 5 wt% micellar casein (MC) solutions. Sonication at 20 KHz and 31 W for up to 30 min changed the surface hydrophobicity of the proteins, whereas surface charge was unaltered. Sonication before the addition of TSPP formed a firm gel with a fine protein network and low syneresis. Conversely, sonication after TSPP addition led to an inconsistent weak-gel-like structure with high syneresis. Gel strength in both cases increased significantly after short sonication times, while the viscoelastic properties were less affected. Overall, the results showed that ultrasonication can have a significant effect on the final gel properties of casein systems.


2021 ◽  
Author(s):  
Taisuke Matsuo ◽  
Yoshiyuki Tabata ◽  
Hina Sasaki ◽  
Yuki Yoshida ◽  
Yayoi Gotoh ◽  
...  

Abstract With an aging society, the number of people with dysphagia has increased. Patients with dysphagia not only find it difficult to eat and drink, but also to take oral medications. Swallowing aid foods, such as deglutition aid jellies and food thickeners are often used to help patients take oral medications. However, the inappropriate use of swallowing aids can decrease the pharmacological activity of the medications. Yogurt is nutritious and easy for patients with dysphagia to eat. Although yogurt is sometimes used to help take medications, its influence on them is poorly understood. In this study, we compared the physical properties and the effects of yogurt on disintegration and dissolution profiles of various oral tablets with those of deglutition aid jelly and xanthan gum-based food thickener. Yogurt and food thickener were found to extend the disintegration time of several tablets, but it remained within a few minutes. Although dissolution of magnesium oxide tablets decreased by 6%, 14%, and 25% after immersion in deglutition aid jelly, food thickener, and yogurt, respectively at 15 min, this decrease reduced with time. Rheological measurements showed that yogurt and food thickeners exhibited a weak gel structure and therefore had better fluidity than deglutition aid jelly. The viscosity and adhesiveness of yogurt were higher than those of food thickener, which delayed tablet disintegration and reduced the dissolution rate. However, these effects were not large. Yogurt may be a useful swallowing aid for patients with dysphagia taking oral medications.


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