Purely elastic, partially and fully plastic stress states in a thick-walled spherical pressure vessel with an inner functionally graded material (FG) coating subjected to internal and external pressures are developed analytically in this paper. The modulus of elasticity and the uniaxial yield limit of the FG coating layer are considered to vary nonlinearly through the thickness. Using Tresca’s ...

For the past 5 years, cultures and subcultures of excised lemon fruit tissue have been maintained in Kimble screw-cap vials (60957, no. 2-2k4), the vials being hermetically sealed with rubber-lined plastic screw caps, size 24 (Kordan, Nature 198: 867, 1963). Under these conditions, the only oxygen available to the excised tissue was that present within the vials at the time of tissue implantati...

Plastic pollution has placed a significant emphasis on the need for synthesising bioplastics, such as polybutylene succinate (PBS), which is derived from succinic acid. Furthermore, environmental concerns and depletion of non-renewable fossil fuels have initiated an interest in exploring biotechnological route acid production via fermentation. Consequently, oil palm biomass might be prospective...

the effect of pre-existing nano sized precipitates on the mechanisms and rate of grain refinement has been investigated during the severe plastic deformation. a binary al–0.2sc alloy, containing coherent al3sc particles, of 3.62 nm in diameter has been deformed by accumulative roll bonding up to 10 cycles. the resulting deformed structures were quantitatively analyzed using electron backscatter...