INDEX cement formation

This paper reports an investigation of the effects of porous solid structures on their electrical behaviour at different frequencies (from 100 Hz to 100 kHz). For that, we study different parameters such as formation resistivity factor, cementation factor, chargeability, resistivity index and saturation exponent. Different porous solid structures are quantified from the petrographic image analysis and Hg-injection technique. Then, by using different models we obtain the permeability prediction from the electrical behaviour and structure parameters. 

Assuming =0 in equations (8) and (l)-(6) we obtain the auxiliary problem for the function 0, = T Y, + qZ, where index i=l denotes temperature in cemented area and i=2 - temperature in the rock formation. Introducing the mean temperature of the cemented ring with internal radius r=ro and external radius r=l as... 

For characterization of smoke formation, light absorbance measured by the photoelectric cell is plotted against time. The area under the curve for the specimen is divided by that for the red oak and then multiplied by 100 to obtain a numerical index for the performance of the material in comparison to that of the red oak, regarded arbitrarily as 100 (while the asbestos-cement board represents the zero point of this scale). 

Thallium is also used in low-temperature thermometers, photoelectric cells, dye pigments, and to produce various types of resistant cements. Because of the element s high refractive index it is utilized in the manufacturing of optical lenses and imitation jewelry. Thallium is included as a component of corrosion-resistant alloys, organic reaction catalysts, and fireworks. The incorporation of thallium halides into organic alkylhalides produces formation of new complexes that act as phosphors. This is the basis for using thallium in scintillation counters [Nal(Tl)]. 

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