Papers

Journal of Ultra Scientist of Physical Sciences - B
Voulume: 30
Issue: 2
Article No. 1
Heat and mass transfer on Unsteady MHD flow of a second grade fluid through porous medium between two vertical plates
K. RAGHUNATH
Research Scholar, JNTU College of Engineering, Anantapur, Andhra Pradesh, (India)
R. SIVA PRASAD
Professor, Department of Mathematics, S.K.University, Anantapur, Andhra Pradesh, (India)
G.S.S. RAJU
3Professor, Department of Mathematics, JNTUA college, Pulivendula, Andhra Pradesh, (India)
Abstract :

In this Paper, an investigation of the heat and mass transfer on the flow of an oscillatory convective MHD viscous incompressible, radiating and electrically conducting second grade fluid in a vertical porous rotating channel in slip flow regime and taking Hall current into account is carried out. The fluid is assumed to be gray, absorbing and emitting radiation out in non scattering medium. The MHD flow is assumed to be laminar and fully developed. A closed form solutions of the equations governing the flow are obtained for the velocity and temperature distributions making use of regular perturbation technique. The velocity, temperature and concentration profiles are discussed through graphically as well as skin friction coefficient, Nusselt number and Sherwood number are evaluated numerically and presented in the form of tables and discussed for different values of governing flow parameters.

Keyword : Hall Effect, oscillatory flow, rotating channel
Paper Download Count : 439
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Article No. 2
Determination of stability constant of mixed ligand complexes of Ni(II) and Cu(II) metal ions with Diethylenetriamine (DET) and Ethylenediamine(en), Glycine (gly), alpha-Alanine (alpha-ala), Phenylalanine (ph-ala). Oxalic acid (ox), Tyrosin (tyr)
M. JAHANGIR ALAM
Department of Chemistry, Bangladesh University of Engineering & Technology (BUET), Dhaka-1000 (Bangladesh)
M.R. ULLAH
Department of Chemistry, Bangladesh University of Engineering & Technology (BUET), Dhaka-1000 (Bangladesh)
MOUSUME AKTHER
Department of Chemistry, University of Chittagong,Chittagong-4331 (Bangladesh)
Abstract :

Transition metal form complex with ligand and this metal complexes play very important roles in biological system. Metal complexes is a branch of biological inorganic chemistry. This field has important implications in many other sciences, ranging form medicine to the environment. It is an interdisciplinary science. Scientists working in different areas of Chemistry, Biochemistry, Biology, Physiology, Agriculture, Physics and even Mathematics. Furthermore, studies of the roles of metal ions is biological system often involve development of relevant chemistry. The analysis of the representative species distribution curves shows that in the pH range 1-4 metal ion M(II) is the major species. In the pH range 4-7 for Cu(II) complex or above in case of Ni(II) complexes the species MA, ML, MAL exist, where M = Ni(II), Cu(II) and A = Diethylenetriamine (DET) and L = Oxalic acid, Tyrosin, Ethylenediamine, Glycine, alpha- Alaline, Phenylalanine, The percentage of the species MA2, ML2 are very less. In the present study, the ligand A, are characterized by three p􀜭􀜪 values. p􀜭1 􀜪 and p 􀜭2 􀜪 corresponds to two -NH2 protons and p 􀜭3 􀜪 corrosponds to -NH proton. It is observed that for the metal ligand formation constant logK1 and logK2, the difference (logK1 - logK2) is more in case of Cu(II) as compare to Ni(II). The logK value was calculated by using SCOGS computer program. The value of logK are more negative of Cu(II) complex compair to Ni(II) complex. So, the complex of Ni(II) is more stable than Cu(II) complexes.

Keyword : Ternary Complex, Diethylenetriamine (DET),, SCOG
Paper Download Count : 561
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