In the present study biosorption technique, the accumulation of metals by biomass was used for the removal of nickel from aqueous medium. The rice bran in its acid treated (H(3)PO(4)) form was used as a low cost sorbent. The adsorption characteristics of nickel on protonated rice bran were evaluated as a function of pH, biosorbent size, biosorbent dosage, initial concentration of nickel and time. Within the tested pH range (pH 1-7), the protonated rice bran displayed more resistance to pH variation, retaining up to 102 mg/g of the nickel binding capacity at pH 6. Meanwhile, at lower pH values the uptake capacity decreased. The % age removal of nickel was maximum at 0.25 g of biosorbent dose and 0.25 mm biosorbent size. At the optimal conditions, metal ion uptake was increased as the initial metal ion concentration increased up to 100mg/L. Kinetic and isotherm experiments were carried out at the optimal pH 6.0 for nickel. The metal removal rate was rapid, with 57% of the total adsorption taking place within 15-30 min. The Freundlich and Langmuir models were used to describe the uptake of nickel on protonated rice bran. The Langmuir and Freundlich model parameters were evaluated. The equilibrium adsorption data was better fitted to Langmuir adsorption isotherm model. The adsorption followed pseudo second-order kinetic model. The thermodynamic assessment of the metal ion-rice bran biomass system indicated the feasibility and spontaneous nature of the process and DeltaG degrees values were evaluated as ranging from -22.82 to -24.04 kJ/mol for nickel sorption. The order of magnitude of the DeltaG degrees values indicated an ion-exchange physiochemical sorption process.
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http://dx.doi.org/10.1016/j.jhazmat.2006.09.055 | DOI Listing |
Gels
January 2025
Faculty of Food Engineering, Stefan cel Mare University of Suceava, 720229 Suceava, Romania.
The amount of saturated fat in cookies can be reduced by replacing margarine with oleogel, resulting in healthier products. In this study, the rheological and textural profile of cookies formulated with oleogel as the main margarine substitute was evaluated. Hemp seed vegetable oil was oleogelized with four types of waxes: beeswax (BW), carnauba wax (CW), candelilla wax (DW), rice bran wax (RW), and three oleogeling agents, sitosterol (S), pea protein (PP), and xanthan gum (XG), respectively.
View Article and Find Full Text PDFFood Res Int
February 2025
Institute of Agrochemistry and Food Technology (IATA-CSIC), Carrer del Catedràtic Agustín Escardino Benlloch, 7, 46980 Paterna, Valencia, Spain; Department of Food and Human Nutritional Sciences, University of Manitoba. Winnipeg, Canada. Electronic address:
High-pressure processing (HPP) enhances food safety and shelf life by inactivating microorganisms and preserving food quality, yet its effectiveness in low-humidity environments has not been evaluated. This study investigated the effects of HPP at 500 MPa for 15 min across varying hydration levels (15, 30, 60, 77 %) on rice bran (RB), aiming to identify microbial effectiveness, besides techno-functional and physicochemical properties. HPP effectively reduced mesophilic bacteria, molds and yeast of RB at > 15 % hydration level, achieving reductions of up to 4 logarithmic cycles in the latter, nearing the detection limit of the method.
View Article and Find Full Text PDFFood Res Int
February 2025
State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China; International Institute of Food Innovation Co., Ltd., Nanchang University, Nanchang 330200, China. Electronic address:
The decline in physiological functions caused by aging increases the prevalence of dysphagia. Anthocyanins play a dual role in enhancing the nutrition of the food and influencing its swallowing properties. The objective of this study was to investigate the impact of anthocyanins from purple red rice bran on the viscosity, rheological and textural properties, and IDDSI classification of rice starch-based dysphagia food masses.
View Article and Find Full Text PDFCureus
January 2025
Electrophysiology, 3Brain AG, Genova, ITA.
The natural product MGN-3 (Biobran) is a defatted, partially hydrolysed rice bran-derived hemicellulose enzymatically modified with an extract of . It has a high proportion of arabinoxylan. It has a protective action against intracerebroventricular streptozotocin-induced murine sporadic Alzheimer's disease and reverses spatial memory deficit in this disease model.
View Article and Find Full Text PDFNat Prod Res
January 2025
Loyola Centre for Research and Development, Xavier Research Foundation, St. Xavier's College Campus, Ahmedabad, Gujarat, India.
Mycophenolic acid (MPA) is an immunosuppressive/antibiotic drug, biologically produced by the fermentation of Penicillium brevicompactum as its secondary metabolite using submerged (SmF) and solid-state (SSF) fermentation processes. In this study, the SSF of (MTCC 1999) was done in optimised conditions to enhance MPA yield. Substrates including basmati and non-basmati rice, barley, oats, cornflakes, rice bran, and wheat bran were 80% moistened and sterilised.
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