Encapsulation of active ingredients in polysaccharide-protein complex coacervates.

Use of gelatin and gum Arabic for encapsulation of black raspberry anthocyanins by complex coacervation.

Microencapsulation using biopolymers as an alternative to produce food enhanced with phytosterols and omega-3 fatty acids: A review

Interaction and formation mechanism of binary complex between zein and propylene glycol alginate

Complex coacervates are self-assembly structures with many potential functional properties. Coacervates are mainly fabricated from proteins and polysaccharides and therefore they can be designed to function over a wide range of conditions in food products by withstanding adverse environmental stresses during manufacturing and storage and even upon passage through the human digestive track. They can be utilized to encapsulate bioactive compounds in order to protect these sensitive ingredients from chemical and physical degradation in a food product during storage and manufacturing as well as during the gastrointestinal tract transition, and thereby improve their biological (physiological) efficacy. Recent advances and achievements are discussed, including the basic principles of structural transitions of interacting biopolymers and formation of coacervates along with their potential use in food products as well as ways to improve their functional performance in conjunction with other physicochemical processes for structuring macromolecular assemblies.

Biopolymer-based coacervates: Structures, functionality and applications in food products

Complex coacervates obtained from lactoferrin and gum arabic: Formation and characterization

Stoner-Wohlfarth model for the anisotropic case

Modeling hysteresis curves of anisotropic SmCoFeCuZr magnets

The Stoner-Wohlfarth model can be used for predicting hysteresis curves of either isotropic or anisotropic nanocrystalline Sm2Co17 type magnets. For isotropic magnets, with Mr/Ms=0.5, the Stoner-Wohlfarth model predicts coercive force of 48% of the anisotropy field. Here, Mr is remanence and Ms is magnetization of saturation. Two texture distributions were compared: Pearson VII and cosn. The calculations indicate that increasing the alignment degree of the grains, the coercivity increases. However, this increase of the coercive force is small. It is found that a very well aligned magnet, with Mr/Ms ratio of 0.96, presents coercivity only ~20% higher than that of the isotropic magnet.

Stoner-Wohlfarth Model for Nanocrystalline Anisotropic Sm2Co17 Magnets

The crystallographical texture is relevant information for NdFeB magnets, since the maximum energy product is directly related to orientation of the crystals. EBSD (Electron Backscattered Diffraction) is a very suitable tool for preferred orientation measurement of NdFeB magnets. The advantages of EBSD against X-ray Diffraction (XRD) pole figures for texture determination are discussed. EBSD identifies misaligned grains, and this is not feasible with XRD pole figures. EBSD is also helpful on the identification of oxides.

Fernanda A. Sampaio da Silva

Papers

Complex coacervates obtained from lactoferrin and gum arabic: Formation and characterization

Stoner-Wohlfarth model for the anisotropic case

Modeling hysteresis curves of anisotropic SmCoFeCuZr magnets

Stoner-Wohlfarth Model for Nanocrystalline Anisotropic Sm2Co17 Magnets

EBSD Texture Analysis of NdFeB Magnets