Preparation and characterization of conjugated PVA/PANi blend films doped with functionalized graphene for thermoelectric applications.

Flexible nanocomposite thick films consisting of PVAPANi polymer blend doped with different concentrations of nanoplatelets functionalized Graphene (NPFGx) (where x = 0, 5, 10, 15, 20, and 25 wt.%) were fabricated using the solution cast technique. Scanning electron microscopy (SEM), X-ray diffractometer (XRD), energy dispersive spectroscopy analysis (EDX), and Fourier-transform infrared spectra (FT-IR) were used to study the structure of the samples.

Feasibility of Saudi wheat flour enriched with cottonseed flour for bread making.

Three samples of edible grade cottonseed flour (cosf) were utilized each in 5%, 10% and 15% mixtures with Saudi wheat flour for bread making. Addition of cosf increased water absorption of the dough. Times of dough mixing, stability and break-down were slightly increased at the low addition level, but adversely shortened at the higher levels, where mixing tolerance was doubled or tripled.

Determination of calcium intake of help of atomic absorption spectrophotometry.

In a dietary survey, large numbers of a wide variety of food samples have to be analyzed. The atomic absorption spectroscopy (AAS), with its simplicity, accuracy and rapidity, suggests itself for determination of many elements in such a case. In this investigation, calcium determination by AAS is reviewed.

On the phosphate problem.

Acceptable Daily Intakes (ADI) of phosphorus set by the FAO/WHO Committee are fixed at 70 and 30 mg P/kg body weight, for conditional (C) (where Ca intake is high) and unconditional (UC) intake, respectively. In light of the increasing application of phosphates in food industries, the question arises whether these permissible limits are not exceeded by certain population group (s). The groups studied in this paper included: children, nursing mothers, farmers and town's men, and students.