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Current Issue

Effects of sand on cbr for swelling clays of the far-north region Cameroon

Author: 
Baana Abouar, M., Dr. Mamba Mpélé and Dr. Elime Bouboama Aimé
Abstract: 

The CBR index is a fundamental parameter used in the construction of the earth works or the bearing layers of roadways. The measurements carried out on the swelling clayey soils show that it is still very weak. CBR measurement tests carried out on the swelling clays and sand compounds in the Far North region of Cameroon indicate that with a 40% sand content and a compactive effort of 25 strokes, the CBR of the swelling clay of Maroua moves from 1.27 to 5.58 and that of Fotokol from 2.18 to 5.26. For a sand content of 30% (resp. 40%) and a compactive effort of 55 strokes, the swelling clay from Maroua moves from 4.3 to 5.31 (resp. 4.3 to 7.9) and that of Fotokol from 3.54 to 5.69 (resp. 3.4 to 7.59) for water content values ranging between 12.11% and 19.79%.

Impact of the motorized ploughing on the structure of tropical ferruginous soils and the efficiency of a corn culture (zea mays, l.) in the n’dali township in north-Benin

Author: 
Zokpodo Koessi Lié Barnabé, Akossou Arcadius Yves Justin, Dayou Ephrème Dossavi and Meadan Wilfrid
Abstract: 

Agriculture has an important role in the development of the Beninese economy. Now, the sector has a major change with the agricultural motorization. In order to contribute to the sustainable management of farms, this study evaluated the effect of four motorized ploughing depths on soil structure and vegetative growth of maize. Results show that ploughing at 15 cm depth provides the best agricultural yield and does not adversely affect the physical, mechanical and hydrodynamic characteristics of the soil. The optimum yield is estimated at 2.98 t / ha with a plow depth of 14.66 cm for the DMR-ESR-W variety. The TZEE-W-SR variety was 3.29 t / ha obtained with a plow depth of 14.39 cm.

A study on working capital management in the selected company in India

Author: 
Dr. Pradip Kumar Das
Abstract: 

The study based on different measures, manifests that the overall working capital position of Tata Steel Ltd., the selected company in India is moderate. Though the behavioral patterns of the different indices are the indication of sound working capital management of the company, yet a few suggestions have been offered to improve certain factors like increase in current assets and decrease in current liabilities through maintaining their optimum levels, prompt payment to creditors through the preparation of periodical reports of the payment schedule, maintaining a definite proportion among the various components of working capital on the basis of past experience and strengthening the cash position through reducing the level of investment in Inventory and paying what is outstanding duly.

An in vitro antioxidant and antibacterial potentials of ethyl acetate extract of enteromorpha intestinalis collected fromcoastal region of kovalam, near Chennai, Tamilnadu

Author: 
Kanimozhi, S. and Sridhar, S.
Abstract: 

Marine algae are well-known to contain a wide diversity of bioactive compounds, many of which have profitable applications in pharmaceutical, cosmetic, nutraceutical, food and agricultural industries.Accepted antioxidants, existing in several group of algae, which are important bioactive compounds that play a vital role counter to various diseases and including anti-ageing processes and protection of cells from oxidative damage. In this high opinion, reasonably little is known about the bioactivity of Indian algae that could be a potential natural source of such antioxidants. The ethyl acetate extract of Enteromorpha intestinalis was evaluated for total phenolic, flavonoid contents, antibacterial and antioxidant (ABTS assay, lipid peroxidation, superoxide radical scavenging, nitric oxide radical scavenging and reducing power) activities. The results indicated that ethyl acetate extract of E. intestinalis was effective in inhibiting the growth of Gram positive viz; Staphylococcus aureus, Bacillus subtilis, gram negative viz; Pseudomonas aeruginosa and Klebsiella pneumoniae and compared to antibiotic streptomycin. The ethyl acetate extract was found to be rich in total phenolic content, and high antioxidant activity as compared to Ascorbic acid. The presence of functional groups of active compounds was confirmed by Gas chromatography mass spectroscopy (GSMS) analysis of ethyl acetate extract. It was concluded that all tested ethyl acetate extract of E. intestinalis had antibacterial and antioxidant activities. These properties might be due to the presence of high total phenolic content or flavonoids. Hence the ethyl acetate extract of thallus of E. intestinalis represent a potential source of antibacterial and antioxidant compounds that may be used in food or pharmaceutical products.

Adsorptive removal of zinc from aqueous solution by biomass carbon prepared from neem (azadirachta indica) leaf

Author: 
Anitha, A., Rajeswari, A. and Jinas Mansura, M.
Abstract: 

Potentially toxic trace elements, such as zinc, with high levels in water pose very serious problems around the world. Adsorption process is among the most effective techniques for removing of many heavy metal ions from different types of water. In this study, an attempt has been made to investigate the efficiency of economically cheaper, easily available and renewable biomass of Neem (Azadirachta indica) leaves for zinc adsorption from aqueous solutions. Biomass carbon samples were prepared from the zero-cost biomass waste of neem leaves. During the removal process, the effects of solution pH, adsorbent dose, contact time, temperature and initial metal ion concentration on adsorption efficiency by Neem Leaf Carbon (NLC) were studied. Experimental equilibrium data were analyzed by the Langmuir and Freundlich isotherm models. The optimum conditions obtained were 30 min contact time, 0.8g adsorbent dose, 45 0C, 0.12M Zn and pH 7 for zinc removal. The equilibrium data fitted well to the Langmuir and Fruendlich adsorption model with correlation coefficient (R2) value of 0.992 and 0.961 respectively. The results revealed that zinc is considerably adsorbed on neem leaf derived carbon and it could be economic method for the removal of zinc from aqueous solutions.

Effect of different cocentration of acid chloride and neutral chloride medium on al 1100 alloy at laboratory temperature

Author: 
Vishwa Prakash and Pruthviraj, R.D.
Abstract: 

This paper evaluates corrosion properties of Al 1100 alloy directly purchased from the industry. The corrodent used for the test is different concentration of acid chloride & Neutral Chloride mediums that is 0.1N 0.05N 0.075N 0.025N of HCl & 3.5%,0.35%,0.035% NaCl respectively .As a concentration of acid chloride & Neutral Chloride medium increases the corrosion rate is also increases. All the test are conducted at laboratory temp. The weight loss potentiodynamic and EIS was studies in all the cases the corrosion rate is decreases an attempt is made in the paper to provide explanation for these phenomena.

Silicone v/s gallium arsenide: Way to future

Author: 
Deepak Sharma, Manish Kumar Poonia and Aashish ranjan
Abstract: 

A solar cell can be termed as photovoltaic cell is an electrical device that converts the heat energy of solar light directly into electricity by photovoltaic effect that is a physical and chemical phenomenon. We have different type of solar cells like SILICON is the most dominating semiconductor in the field of PV cells and this paper is about comparative study with its close competing material GALLIUM ARSENIDE in different modules like crystalline, MONOCRYSTALLINE and thin film. As well as different modules of silicon solar cell are also discussed. GALLIUM ARSENIDE has clearly high efficiency and several other advantages over SI but due to high cost (about 1000 times more than of SI’s cost) application of such cells is limited to a narrow region. In this paper several ways and methods are also discussed to make silicon and gallium arsenide batter in several aspects.

Determinants of health status of women employed in agriculture sector

Author: 
Dr. Varsha S. Zanvar and Aruna R. Kharwade
Abstract: 

This study was undertaken to determine the effect of anthropometry, haemoglobin level and common health problems on health status of 500 women employed as agriculture labourers in Parbhani district of Marathawada region of Maharashtra state. The study revealed that majority of female farm labourers were from nuclear families in urban slums (76.8 %) and in rural (67.2 %). More per cent of rural families (79.2 %) were vegetarian whereas urban slums (69.2 %) were non-vegetarian. Maximum numbers of farm women were belonging to income group Rs. 6001-10,000/- per month. The height, weight, BMI, MUAC, waist circumference, hip circumference and WHR of selected female farm labourers ranged between 150.28 + 5.80 to 151.32 + 4.96 cm, 47.77 + 8.63 to 51.05 + 9.53 kg, 20.87 + 3.42 to 22.52 + 3.98, 24.99 + 3.22 to 26.06 + 3.84 cm, 72.05 + 8.10 to 76.35 + 10.15 cm, 86.13 + 7.63 to 90.55 + 9.10 cm and 0.83 + 0.06 to 0.86 + 0.08 respectively. On the basis of BMI 57.00 to 64.00 percent female farm labourers were categorised as normal. Near about 75 to 80 percent surveyed respondents were suffered with one or other grade of anaemia. Most commonly observed health problem among all selected female farm labourers was pain in legs (45.6%) followed by backache (41.2%), headache (32.4%) and weakness (27.4%).

Effect of dimethoate on the lipid content in the fingerlings of cat fish clarias batrachus

Author: 
Bharathi, A., Krishnapriya, R. and Padmaja, M.
Abstract: 

Dimethoate is an organophosphorous insecticide mostly used in the agricultural field. It exhibits contact and systemic action. The aim of the study is to prove the impact of the dimethoate in relation to the alteration in the lipid content in the kidney, liver and muscle of the fingerlings of cat fish. The fishes were exposed to lower (1.923ppm) and higher (0.961ppm) sub lethal concentration of dimethoate for the experimental periods 15, 30 and 45 days. Thereafter, the tissues were taken for the analysis of cholesterol, phospholipids, triglycerides and free fatty acids. The outcome of this research proves that dimethoate produces significant alterations in the content of cholesterol, phospholipids, triglycerides and free fatty acids when compared to the control fish.

Numerical solution of burgers’ equation using fourier expansion based on differential quadrature method

Author: 
Tadesse Mamo, Alemayehu Shiferaw and Masho Jima
Abstract: 

The Fourier expansion-based differential quadrature (FDQ) method was applied in this work to solve one-dimensional Burgers’ equation with appropriate initial and boundary conditions. In the first step for the given problem we have discretized the interval and replaced the differential equation by the Fourier expansion basis based on differential quadrature (FDQ) to obtain a system of ordinary differential equation (ODE). The obtained ordinary differential equation was solved by fourth order classical Range-Kutta method. Finally the validation of the present scheme was demonstrated by numerical example and compared with some existing numerical methods in literature. The method is analyzed for stability and convergence. It is found that the proposed numerical scheme produce accurate results and quite easy to implement.

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