This paper investigates the production of alumina from kaolinite by leaching method using hydrochloric acid. Raw kaolin was calcined at 850?C then leached with 6 M acid 90?C, followed addition HCl solution to leachate aluminum hydroxide precipitated. Finally, precipitated heated 1100?C and turned into oxide. Materials were identified XRF, XRD SEM-EDX techniques. Alumina recovery percentage dete...

The protoberberine alkaloid berberine carries methylenedioxy moiety and exerts a variety of pharmacological effects, such as antiinflammation and lipid-lowering effects. Berberine causes potent CYP1B1 inhibition, whereas CYP1A2 shows resistance to the inhibition. To reveal the influence of oxidative metabolism on CYP1 inhibition by berberine, berberine oxidation and the metabolitemediated inhib...

Measurements of microwave attenuation at room temperature and 4.2 K have been performed on some conductors commonly used in receiver input circuits. The reduction in loss on cooling is substantial, particularly for copper and plated gold, both of which showed a factor of 3 loss reduction. Copper passivated with benzotriazole shows the same loss as without passivation. The residual resistivity r...

Mechanical Properties and Microstructure of Al–Sc with Rare-Earth Element or Al2O3 Additions Richard Albert Karnesky, Jr. Aluminum alloys strengthened with coherent (L12), nanosize Al3Sc precipitates are structural materials that have outstanding strength at ambient and elevated temperatures. They are creep resistant at 300 ◦C and exhibit a threshold stress, below which creep is not measurable....

Abstract A thermodynamic model capable of predicting the change in internal energy, work done, and thermal energy required during aluminum-stainless steel explosive cladding is presented. The mathematical instrumental determining temperature pressure developed at interface, which characterizes interface microstructure, compared with numerical simulation. Numerical simulation implemented by Smoo...

The rigorous coupled-wave approach was used to compute the plane-wave absorptance of a thin-film tandem solar cell with a metallic surface-relief grating as its back reflector. The absorptance is a function of the angle of incidence and the polarization state of incident light; the free-space wavelength; and the period, duty cycle, the corrugation height, and the shape of the unit cell of the s...

Aluminum is a material that soft, lightweight, resistant to corrosion, and has good electrical thermal conductivity. specific gravity of about 2.65-2.8 kg/dm³, melting point 658ºC, tensile strength 90 MPa. 1100 series an aluminum alloy mixed with other materials, such as copper, iron, chrome, manganese, zinc, content 99,0%. Welding the joining two metals in liquid state or without filler. FSW (...