Production of sodium caseinate and blackcurrant concentrate via spray‐drying and freeze‐drying techniques: effects on protein functional properties

Author(s):  
Gang Wu ◽  
Xiaodan Hui ◽  
Margaret A. Brennan ◽  
Xin‐An Zeng ◽  
Xinbo Guo ◽  
...  
2009 ◽  
Vol 45 (4) ◽  
pp. 829-840 ◽  
Author(s):  
Ruchi Tiwari ◽  
Birendra Srivastava ◽  
Gaurav Tiwari ◽  
Awanik Rai

The present study investigated a novel extended release system of promethazine hydrochloride (PHC) with acrylic polymers Eudragit RL100 and Eudragit S100 in different weight ratios (1:1 and 1: 5), and in combination (0.5+1.5), using freeze-drying and spray-drying techniques. Solid dispersions were characterized by Fourier-transformed infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), Powder X-ray diffractometry (PXRD), Nuclear magnetic resonance (NMR), Scanning electron microscopy (SEM), as well as solubility and in vitro dissolution studies in 0.1 N HCl (pH 1.2), double-distilled water and phosphate buffer (pH 7.4). Adsorption tests from drug solution to solid polymers were also performed. A selected solid dispersion system was developed into capsule dosage form and evaluated for in vitro dissolution studies. The progressive disappearance of drug peaks in thermotropic profiles of spray-dried dispersions were related to increasing amount of polymers, while SEM studies suggested homogenous dispersion of drug in polymer. Eudragit RL100 had a greater adsorptive capacity than Eudragit S100, and thus its combination in (0.5+1.5) for S100 and RL 100 exhibited a higher dissolution rate with 97.14% drug release for twelve hours. Among different formulations, capsules prepared by combination of acrylic polymers using spray-drying (1:0.5 + 1.5) displayed extended release of drug for twelve hours with 96.87% release followed by zero order kinetics (r²= 0.9986).


2016 ◽  
Vol 33 (6) ◽  
pp. 1486-1496 ◽  
Author(s):  
Sharon S. Y. Leung ◽  
Thaigarajan Parumasivam ◽  
Fiona G. Gao ◽  
Nicholas B. Carrigy ◽  
Reinhard Vehring ◽  
...  

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1396
Author(s):  
Hojjat Pashazadeh ◽  
Oscar Zannou ◽  
Mohamed Ghellam ◽  
Ilkay Koca ◽  
Charis M. Galanakis ◽  
...  

Cornsilk is maize waste containing phenolic compounds. In this study, freeze-drying, spray-drying, and microwave-drying techniques were evaluated for the encapsulation of cornsilk’s phenolic compounds using maltodextrin as wall material. The results of antioxidant properties showed that freeze-drying was more efficient than microwave-drying and spray-drying techniques. The highest recovery of phenolic compounds was obtained with freeze-drying. The microstructure, DSC, and FTIR data showed that the encapsulation process was effective, and freeze-drying was the best drying technique. The physical properties of the microparticles greatly changed with the drying techniques. This study revealed that the phenolic compounds of the cornsilk extract can be successfully encapsulated and valorized.


2020 ◽  
Vol 58 (3) ◽  
pp. 314-324
Author(s):  
Vanja Šeregelj ◽  
Gordana Ćetković ◽  
Jasna Čanadanović-Brunet ◽  
Vesna Tumbas Šaponjac ◽  
Jelena Vulić ◽  
...  

Research background: The aim of this work was to evaluate utilization of sweet potato peel as a source of bioactive compounds. The effect of solvents (acetone and acetone/ethanol mixture) on extraction efficiency of total carotenods and phenolics from sweet potato flesh tuber and peel, and antioxidant activity were investigated. SPP extract standed out in terms of antioxidant activity and was choosen for encapsulation by spray and freeze drying techniques. Experimental approach: Encapsulation is an effective method to improve phytochemical stability by entrapping the core material with a coating agent. In this study, spray and freeze-drying techniques were applied for improving the stability of bioactive compounds (carotenoids and phenolics) using whey protein as a coating material. The main advantages of applied techniques over the other encapsulation techniques are simplicity, continuity, effectiveness, availability, and applicability. Results and conclusions: Physicochemical characteristics revealed that spray drying resulted in the formation of lower size particles, better flowing properties, and encapsulation efficiency of carotenoids. The retention of encapsulated and non-encapsulated bioactive compounds was monitoring during storage at daylight and dark conditions. Storage conditions affected the carotenoid retention, whereas daylight exhibited the higher degradation rate for all samples. Phenolic compounds exhibited higher retention for all investigated samples. Degradation kinetic parameters suggest the longer shelf life of spray dried encapsulates and potent method for bioactives stabilization. Novelty and scientific contribution: This study demonstrates that the spray drying technique and utilization of sweet potato peel have big potential in functional additives development, with improved nutritional, color and bioactive properties.


2021 ◽  
Vol 299 ◽  
pp. 110466
Author(s):  
Gang Wu ◽  
Xiaodan Hui ◽  
Ruibin Wang ◽  
H.N.N. Dilrukshi ◽  
Yanyu Zhang ◽  
...  

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