The prediction of accurate values of saturated enthalpy of vapor is very important in process design calculations and other industrial applications. Experimental measurements of saturated enthalpy of vapor are not easy to perform. So in order to obtain accurate saturated enthalpy of vapor, attention has been turned to calculate them using equations of state.
Steganography is the art of information hiding in ways that prevent its detection. A message in cipher text may raise suspision, while an invisible message will not. Digital steganography uses a host data or message, known as a ''container'' or ''cover'' to hide another data or message called ''secret'' in it. An Image in audio steganography system had been proposed in this thesis in order to embed a secret image data in audio data.
Two types of synthetic crystalline zeolites have been used as supports for noble-metal catalysts, namely HZSM-5 and H-Mordenite with SiO ratios of 90 and 40 respectively. The cations, Barium and Strontium zeolite forms were prepared by twice repeated ion-exchange with appropriate chloride solution of 3 normality at pH 7.2 and 50oC. The modified zeolites were dried at 110oC and calcined at 450o C by step wise temperature increase. The ion-exchange by strontium was more effective than by Barium cation. While the ability of H-replacement at HMOR was higher than in case of HZSM-5.
