Archives-j 

A Lamotrigine (LMG) reagent, 6-(2,3-dichlorophenyl)-1, 2,4-triazine-3,5-diamine. Its molecular formula and molecular weight are C9H7N5Cl2 and 256.09 respectively, was employed for the sensitive spectrophotometric determination of gold(III). The gold(III) ion forms a yellow-coloured complex with LMG in an aqueous solution at pH 3.0. The gold complex shows the absorption maximum at 400 nm, and Beer, s law obeyed in the range of 10-160 µg/ml. The molar absorptivity and sandell, s sensitivity were found to be 1.38 X 103 mol -1 cm-1 and 0.0184 µg cm-2 respectively. The complex shows 1:1 [Au(III) : LMG] stochiometry with a stability constant of 4.77X104. The interference effect of various diverse ions has been studied. In addition to zero- order, first derivative spectrophotometric methods was also developed for the determination of gold(III) in trace amount which was more sensitive than the zero-order method. The developed method has been used for the determination of gold(III) in various kinds of alloys. The results was in excellent agreement with certified values.

A two stage novel speech enhancement algorithm is presented in this paper. First stage is designed such that it can substantially improve the signal to residual spectrum ratio by combining statistical estimators of the spectral magnitude of the speech and noise. By expressing the signal to residual spectrum ratio as a function of the estimators gain function. We derive a hybrid strategy that can improve the signal to residual spectrum ratio when the apriori and the posteriori SNR are detected to the lower than 0dB. The enhanced signals still suffer from undesirable speech distortion due to harmonic distortion. Some harmonics are considered as noise only components and are suppressed. To overcome harmonic distortion introduced in enhanced speech, in the proposed method the suppressed harmonics are regenerated. Objective and subjective tests were carried out to demonstrate improvement in the perceptual quality of speeches by the proposed technique.

This paper studied and fit a Multivariate linear regression model to the relationship between the response variables; Weight and Bulk density on one hand, and the predictor variables; Temperature, Moisture content before extrusion and Moisture content after extrusion on the other hand, of Cheese puffs product, manufactured by Zubix Company Limited, Anambra, Nigeria. A sample size of three hundred (300) cheese puffs packs were collected from a population of two-thousand, seventy-eight batches between August 2013 to June 2014, examined and used for analysis. A temperature of 186.67?C was discovered to be significantly related to the response variable.

Zinc Ferrite (ZF) is a material that is paramagnetic. Its presence in the universe has a magnetic force that is different depending on the structure and composition of materials. In some cases look almost the same, especially on substances ZF reacted at temperatures between 60 0C to 90 0C. ZF 70 have weaknesses at a temperature of 70, which is where most low coercivity alternating magnetism.

The paper reviews pollination studies in oil palm in West Africa, the Far East and South and Central America. The main types of pollination in the oil palm, anemophily and entomophily, and other forms of pollination are discussed. The floral characters of the oil palm that promote anemophily and entomophily are: abundant smooth dry pollen grains, enlarged stigmatic surfaces, reduced perianth, coloured perianth and a raised female inflorescence. The critical role played by insects and the resulting increases in yield of fresh fruit bunches (ffb) and oil following introductions of pollinator insects into the plantations in the Far East and Central and South America are mentioned. The introduction of insect pollinators into areas in the Far East with poor fruit set rates led to the cessation of assisted pollination and increased profitability. The introduction of the insect pollinators led to as much as 36 – 80 % improvement in fruit set, a 12 % increase in fruit-to-bunch ratio and a 28 – 54 % increase in mean bunch weight. The oil-to-bunch ratio increased by 9 % and a 43 % improvement recorded in the kernel-to-bunch ratio. Insects belonging to the Elaeidobius spp. (Coleoptera: Curculiondae; Derelominae) are the main insects involved in pollination of the oil palm. Other insects listed are the Prosoestus spp., Microporium spp. (Coleoptera: Nitidilidae) and Atheta spp. (Coleoptera: Staphylinidae). Mystrops spp. are of economic importance in South and Central America. The insects generally carry pollen on their hairy bodies and wings. The bigger and more hairy insects are more efficient pollinators and contribute to adequate fruit set and increased yield. Pollinator insect populations may be conserved through the selective use of insecticides, the proper timing of application, and the mode of application to achieve sustainable production.

The present investigation was carried to monitor simultaneously the physico-chemical characteristics of water and sediments of Dal Lake over a period of one year from March 2014-Feb.2015. In all 17 parameters from surface water and 13 parameters from sediments were analysed. The parameters analysed during the study were pH, conductivity, biochemical oxygen demand (BOD), chemical oxygen demand (COD), total dissolved solids (TDS), dissolved oxygen (DO), ammonical nitrogen, phosphate, sulphate, total hardness (TH), chloride (Cl-), and metals (Na, K, Fe, Ca, Mg). The results of both water and sediment samples revealed an overall increase in the concentration of the parameters than the permissible limits due to pollution.

Interpolation is the process of enlargement of images which is used in modern era of communication system to get highly magnified best quality image. In this paper, different types of interpolation algorithms are presented, out of which Bicubic method exceeds all other methods as it eradicates the blurr and stair shaped edges, which were generated when all other interpolation algorithms were applied. Hence it is highly recommended in various Image processing based applications like Satellite Navigation, Television Broadcasting, Computer Graphics, Special Effects etc.

Study the tensile strength and hardness of poly vinyl chloride as a matrix and subsidized fiber (short fiber glass - glass fibers are woven mat - fibers, nylon-6) and attended samples fractures different size. (21% - 23% - 25% - 27% - 29% ).A comparison was made of the results of the tensile tests and hardness of materials composite as tests were conducted at room temperature . ( 23+2 c).Results from the volumetric fraction lead to increased resistance to tensile and hardness values. Results of the materials [pvc + f (w .r+N-6)] had its highest value of the tensile strength and material [pvc+ fg(w.r)], had its highest value of hardness.

The incidence of stenosis of the subclavian artery represents 3 to 4% of the general population [1]; atherosclerosis is the most common cause. We conducted this study to review the stenocclusive pathology of the subclavian artery, and to expose our experience in surgical and endovascular management. It is a retrospective and analytical study conducted within the department of vascular surgery of Mohammed VI CHU. Surgical treatment consisted of subclavio-carotid transposition in 2 cases, carotid-bypass grafting in one case and angioplasty with stent placement in the latter case. It is important for the surgeon to have a thorough understanding of the anatomy and etiology of subclavian artery stenosis, while considering the surgical options. This case series presents some of the treatment options available to vascular surgeons for the management of symptomatic subclavian artery disease.

The hallux valgus is defined as a lateral deviation of the big toe over the first metatarsal. It is the static deformation of the most common forefoot. Our study included a retrospective study of 27 cases of hallux valgus collected at the service of academic orthopedic trauma CHU Ibn Sina Rabat between 2010 -2013 with a mean of 4 years. The average age was 44.8% years. The predominantly female was 85% More than half of the forefeet were Egyptians: 85 2%. The predominant morphology of the feet was hollow: 40 7%. The surgical technique the most used was the MAC BRIDE and its variants: 40.8%, followed by technical SCARF: 18.6%. We found 74, 1% of good result. In light of these results, the surgical techniques the most appropriate are those permanently relieving the patient with first the techniques used on the soft-parts.