http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/1521 2026-04-05T17:28:55Z http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/500 VOLUMETRIC AND VISCOMETRIC STUDIES ON ELECTROLYTES IN NON-AQUEOUS SOLVENT Yousuf, M. A; Reza, K. M. Salim; Moniruzzaman, Md.; Aziz, M. A. The densities, r and viscosities, h of NH4Cl, NiCl2 and FeCl3 in dimethylsulfoxide were studied as a function of concentration. The partial molal volume, ( 0 v j ) of these electrolytes were evaluated. The viscosity and viscosity-coefficients (A and B) were also determined by Jones-Dole equation. B-coefficient for NiCl2 and FeCl3 are positive that show structure making behavior in all the solutions while those of NH4Cl are negative indicating structure breaking properties. The coefficient A represents the solute-solute interactions coupled with size and shape effect of the solute and to some extent solute-solvent interactions. The behaviors of three solutes in binary systems were discussed in terms of the charge, size and hydrogen bonding effect. 2009-07-01T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/499 OPTIMIZATION OF THE BIOEQUIVALENCE STUDY OF ESOMEPRAZOLE CAPSULE CONTENTS AFTER IN VITRO SUSPENSION IN SOFT FOODS USING HPLC Alauddin, M.; Hossain, K. M. Z; Rahman, M. A.; Kabir, A. S. M. H; Khan, I. H A bioequivalence study for the selection of the alternative and feasible mode of administration of esomeprazole pellets suspended in some common soft liquid foods has been done. 20 mg of four different brands esomeprazole pellets suspended in yogurt, orange juice, apple juice and milk were analyzed in the gastric environment using dissolution tester and high performance liquid chromatography. The release of the esomeprazole active was found more the 90% using these liquid foods except milk. The optimal release of the active was found in the system of apple juice (97.06%). Administration of the esomeprazole pellets suspending in apple juice may be a practical alternative for patients who cannot swallow an intact capsule. 2009-01-01T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/498 LINEAR DIFFERENTIAL ALGEBRAIC EQUATIONS WITH CONSTANT COEFFICIENTS Hossain, M. Sahadet; Rahman, M. Mostafizur Differential-algebraic equations (DAEs) arise in a variety of applications. Their analysis and numerical treatment, therefore, plays an important role in modern mathematics. The paper gives an introduction to the topics of DAEs. Examples of DAEs are considered showing their importance for practical problems. Some essential concepts that are really essential for understanding the DAE systems are introduced. The canonical forms of DAEs are discussed widely to make them more efficient and easy for practical use. Also some numerical examples are discussed to clarify the existence and uniqueness of the system’s solutions. 2009-07-01T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/497 IMPACT OF CONSISTENT FIBRE PROPERTIES ON OPTIMIZATION OF FABRIC BARRÉ Rashid, Md. Sanuwar Cotton is a natural fibre. It’s growth depends upon the seasonal weather, climate condition and affection of paste and insects. So the properties of cotton fibres vary not only from lot to lot but also in same lot. The properties such as Micronaire, color grade, maturity measure the ability of dye absorbency of fibre. So if there is high variation of these properties in cotton then a significant variation of dye absorbency in fabric is observed. So the fabric, made form cotton yarn having inconsistent properties, generate complain of barré marks known as patta to our local people. To eliminate or minimize the problem of barré we must have to ensure the uniform distribution of cotton properties throughout the yarn manufacturing stages. And Bale Management is the procedure of determining mix laydowns by maintaining an appropriate combination of cotton properties with consistency through several mixes. Short and long term variation of fibre properties with in and between mixes is responsible for fabric barré which is possible to avoid by bale management. 2009-07-01T00:00:00Z