Characteristics and gel properties of gelatin from goat skin as affected by spray drying

Gelatin powder from goat skin prepared by spray drying at various inlet temperatures (160–200°C) was characterized. Predominant particle sizes were in the range of 4.65–5.14?µm. Gelatin powder was mostly concave in shape with varying sizes, depending on inlet temperatures used. All gelatin powders were creamy whitish. Powder generally became more yellowish as the inlet temperature of spray drying increased (p?p?p?p?>?0.05). Goat skin gelatin spray dried with inlet temperatures of 160 or 180°C had higher gel strength than commercial bovine gelatin (p?相似文献   

Heat transfer in pipe flow of a Johnson–Segalman fluid

A mathematical model for flow and heat transfer has been presented for Johnson–Segalman fluid in a pipe. Employing homotopy analysis method, the developed equations are solved analytically. The velocity and temperature fields are obtained. The dependence of the flow quantities on the material properties and Brinkman number is determined.     

Appropriate thermal procedure for the preparation of high-T c phase of Bi1.6Pb0.4Sr2Ca2Cu3Oy superconductor

The high-T _c phase of Bi_1.6Pb_0.4Sr₂Ca₂Cu₃O_y has been synthesized using an appropriate thermal procedure. D.c. electrical resistivity and X-ray diffraction studies have been done. The measurements show that a slow cooling process is necessary for a better control of the thermal process. The variation in T _c as a function of annealing time is also reported. Indexed X-ray diffraction patterns indicate the formation of high- as well as low-T _c phases.     

Polyphenylene sulphide/carbon fiber composites: study on their thermal,mechanical and microscopic properties

The present study investigates the thermal, mechanical and microscopic properties of polyphenylene sulphide/carbon fiber (PPS/CF) composites by incremental number of fiber layers. The composites were prepared by hand lay-up technique followed by compression molding. A superior matrix-reinforcement adhesion was attained without the use of coupling agent and mechanical stability of the composites improved with increasing fiber layers. Transverse rupture strength and bending modulus were improved by 59.84 and 125.21 %, respectively, without loss in toughness. Impact strength and hardness values were enhanced while storage modulus, loss modulus and damping factor were dropped by increases in fiber layers. Thermogravimetric analysis (TGA) indicated a gradual rise in thermal stability (16.84 %) of the composite as compared to pure matrix. Surface morphology and crack propagation were studied by optical microscopy. It was found that crack was propagated in a linear plane by applying load. In addition, scanning electron microscopy (SEM) illustrated steady alignment of fibers and uniform distribution of the matrix around reinforcement. Based on the obtained results, fiber layers showed great potential for enhancement of thermal and mechanical properties of the composites.     

Physical Characterization,Optical Properties,and Magnetic Interactions of Cadmium-Doped Zinc Ferrite Nanoparticles

Journal of Superconductivity and Novel Magnetism - The physical characterization and magnetic interactions of cadmium-doped zinc ferrite nanoparticles...