Polyacrylic Acid

Physicochemical composition and techno-functional properties of bee pollens collected in Serbia were assessed. Analysed bee pollen contained 14.81e27.25% proteins, 1.31e6.78% lipids, 64.42e81.84% carbohydrates and 1.18e3.21% ash, with mean energy value of 375 kcal. Bee pollen showed low protein solubility (2.79e25.90 g/100 g), high carbohydrate solubility (31.2e75 g/100 g), good emulsifying properties (emulsion stability index ranged from 19.6 to 49.3 min and emulsion activity index ranged from 10.40 to 24.52 m 2 /g), non-foaming properties, poor water absorption capacity (0.92e2.25 g/g) and excellent oil absorption capacity (1e3.53 g/g). Protein solubility was positively correlated with carbohydrate content (r ¼ 0.73, p < 0.05), but negatively with ash and lipid content (r ¼ À0.39, r ¼ À0.46, p < 0.05, respectively). The total protein content and lipid content were shown positive relationship with carbohydrate solubility (r ¼ 0.39, r ¼ 0.45, p < 0.05, respectively). Emulsion stability was positively correlated with protein solubility (r ¼ 0.47, p < 0.05), whereas emulsion activity was negatively correlated with this parameter (r ¼ À0.39, p < 0.05). Water and oil absorption capacity were not shown significant correlations with other investigated parameters. The obtained data indicated that bee pollen could find useful application as food ingredient in variety of food products.

Abstract The design of effective supporting matrices to efficiently cycle Si nanoparticles is often difficult to achieve and requires complex preparation strategies. In this work, we present a simple synthesis of low-cost and environmentally benign aAnatase TiO2 nanoparticles as buffering filler for Si nanoparticles (Si@TiO2). The average anatase TiO2 crystallite size was approximately 5 nm. A complete structural, morphological, and electrochemical characterization was performed. Electrochemical test results show very good specific capacity values of up to 1000 mAh g−1 and cycling at several specific currents, ranging from 500 to 2000 mA g−1, demonstrating a very good tolerance to high cycling rates. Postmortem morphological analysis shows very good electrode integrity after 100 cycles at 500 mA g−1 specific current.