Archives-June... 

The search for more effective hypoglycaemic agents continues to be an area of research interest. World Health Organization recommended the use of alternative therapy especially in countries including, Nigeria, where access to conventional treatments of diabetes is inadequate. Majority of people in Abeokuta were majorly peasant farmers and petty traders who could not afford high cost of pharmaceutical remedies of diabetes which is very rampant as a result of poor feeding pattern. However, naturally endowed plants such as Hibiscus sabdariffa are found everywhere, parts of which are taken as vegetables without putting into consideration its hypoglycemic advantages. However, this study could assist in providing some information needed for the health improvement of the rural populace (Abeokuta) as regards diabetes. Combination of 300g M. lucida + 100g A.sativum+l00g Z. officinale produced the best hypoglycaemic effect (69.85%) in alloxan-induced diabetic rats.

In this research toward optimizing resource allocation, an innovative learning algorithm will used to select and optimize portfolio in Tehran Stock Exchange. A new method was proposed based on the combination of ICA (Imperial Competitive Algorithm) and GA (Genetic Algorithm) which improves the convergence speed and accuracy of the optimization results.. The obtained results show that compared with the previous method, the proposed algorithms are at least 32% faster in optimization processes; also the variance convergence speed is smaller than the ICA and GA.

Co_0.5Mn_0.25Zn_0.25Fe₂O₄ nanoparticles of average size of 61 nm were prepared by chemical co-precipitation method which could be used for ferrofluid preparation. The composition is characterized by X-ray diffraction technique (XRD). XRD study shows formation of single phase homogeneous compound with cubic structure. The crystal size was calculated from XRD data by using Scherrer equation and is confirmed by SEM, which reveals the formation of nanocrystalline ferrite. The dielectric constant and dielectric loss dependence on doping level and frequency at room temperature were described in detail. The leakage current properties of Co_0.5Mn_0.25Zn_0.25Fe₂O₄ nanoparticles were also discussed.

In this research, immunoaffinity chromatography was used to purify factor VII from prothrombin complex (PPSB), which contains coagulation factors II, VII, IX and X. For this purpose DEAE-Sephadex and CNBr-activated Sepharose 4B gels were used. Specific activity of factor VII concentrate increased from 0.16 to 55.6 with purification-fold of 347.5 and the amount of activated factor VII (FVIIa) was found higher than PPSB (4.4-fold). Results of electrophoresis on agarose gel indicated higher purity of FVII compared to PPSB and these finding revealed that factor VII migrated as alpha-2 proteins. In order to improve viral safety, solvent-detergent treatment was applied prior to further purification and elimination of tween 80 was nearly complete (2 ?g/ml). Factor VII concentrate is used for patients with factor VII deficiency and also for hemophilia patients with inhibitors.

This study was conducted to investigate the relationship between job challenge and the experience of burnout among four groups of health workers in Ekiti State University Teaching Hospital, Ado-Ekiti, Nigeria. One hundred and forty health workers were selected through purposive sampling from the Ekiti State University Teaching Hospital. The sample consists of 16 pharmacists, 30 health assistants, 36 doctors and 58 nurses. Perceived Job challenge Measure and Maslach Burnout Inventory (MBI) were the instruments used for the study. Four hypotheses were tested using Pearson Product Moment Correlation Coefficient. Results from this study revealed that there was a significant relationship between job challenge and burnout among health workers in Ekiti State, Nigeria. Also, positive stimulation, a component of job challenge had a positive relationship with burnout. Competence testing, another component of job challenge was found to be significantly related to dehumanisation and global burnout. While there was no relationship found between the uncertainty, the last component of job challenge and burnout. Findings were discussed in the light of previous literature on job challenge and burnout and appropriate recommendations were made.

This study intends to argue sacrificial scapegoat archetype in The Goat or Who is Sylvia? by Edward Albee, one of the famous American dramatist. For gaining this aim, first, a summary of the play is given. Second, tension and problem which is oriented round a sexual transgression in this play will be discussed. Third, the situation in which recognition and revelation of the problem occurs is to be exposed. Fourth, the role of vehicle which in this play casts on the goat as a scapegoat will be considered and fifth, the significance of sacrificial scapegoat on the play will be argued.

The molecular vibrations of 3,5-dimethylpyridine (35DMP) were investigated at room temperature by Fourier transform infrared (FTIR) and FT-Raman spectroscopy. The spectra of the above compounds have been recorded in the region 4000-400, 4000–100 cm-1, respectively. They were interpreted with the aid of normal coordinate analysis following full structure optimization and force field calculations based on density functional theory (DFT) using B3LYP /6-31G* and B3LYP/6-311+G** methods and basis set combinations. The results of the calculations were applied to simulated infrared and Raman spectra of the title compound, which showed excellent agreement with the observed spectra. The vibrational force constants were also performed by using DFT calculations. The difference between the observed and scaled wavenumber values of most of the fundamentals is very small. The values of the total dipole moment (µ) and the first-order hyperpolarizability (?) of the investigated compound were computed using DFT calculations. The calculated results also show that the 35DMP might have microscopic nonlinear optical (NLO) behavior with non-zero values. A detailed interpretation of the infrared and Raman spectra of 35DMP is also reported based on total energy distribution (TED). Electronic excitation energies, oscillator strength and nature of the respective excited states were calculated by the closed-shell singlet calculation method were also calculated for the molecule.

Future communication should operate at higher data rates, be more reliable, and operate in increasingly crowded frequency allocations. New technologies are being tried in this direction and chaotic communication is one among them. Equivalently, chaotic signals decorrelate rapidly with themselves. The autocorrelation function of a chaotic signal has a large peak at zero and decays rapidly. Same random sequence can be obtained provided we know the exact initial condition for the process. The nonlinear, unstable and aperiodic characteristic of chaotic signals has numerous features that make it attractive for communication use. Chaotic communication is rather a new field in communication research. During the past 15 years, there has been a tremendous interest worldwide in possibility of exploiting chaos in wideband communication system. In this direction already 4 generations of chaotic communication is evolved. In this project we have implemented five different types of chaotic modulation. Demodulation is either coherent or non coherent, based on the type of modulation. For coherent demodulation we used correlator receiver and adaptive filter receiver. We have made a comparison among different types of modulation techniques.

In this paper we paper we define smooth graceful labeling and semi smooth graceful labeling for a graph. We also prove that a grid graph PnXPm is smooth graceful graph and a star K1,n is semi smooth graceful graph. Using this we proved that star of a star, star of smooth graceful tree and path union of a smooth graceful tree are graceful trees. We also get graceful labeling for comb graph and simple lobster graph.

This paper presents the results of a RF receiver front-end design used in Personal Wireless Area Network (PWAN) and implemented in a 0.13µm CMOS process with source degenerated amplifier. Device models were used in MULTISIM and MATLAB Particle Swamp Optimization implementation to iteratively find a solution to optimal component values for user LNAtopology. To demonstrate the design methodology, a sub-mW fully integrated narrow-band sourcedegenerated cascode RF LNA is designed and simulated in a standard 0.13µm CMOSprocess to operate in the 2.4GHz band. The LNA achieves a voltage gain of 24 dB,noise figure (NF) of 1.4 dB, from a 4.4 mA supply current.