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M. Selvaraj , D. Syamala , S. Arumugam , M. V. Rao

Abstract

Container grown seedlings of tropical trees such as Acacia leucophloea, A. mangium, A. nilotica, Delonic regia, Derris indica and Tamarindus indica were inoculated with three arbuscular mycorrhizal fungi (AMF) viz. Glomus fasiculatum, G. mosseae and Gigaspora margarita. The growth responses ortbe seedlings such as height, ischolar_main eo1lar diameter, ischolar_main and shoot biomass were analysed. In addition, accumulation of phosphate in ischolar_main, stem and leaves was also analysed. It was observed that there was a differential efficiency in mycorrhizal colonization and the specificity of fungal symbionts to stimulate host to a significant growth response.

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M. V. Rao , J.s. Rawat , A. Manavalam , A. Gnanam

Abstract

The paper presented the results of trials with various clones of Populus deltoides conducted on semi-arid region. It revealed from the observations that G3, G48 and 65/27 clones collected from Kanpur and Debra Dun can be better adapted to semi-arid region.

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M. Balaji , M. V. Rao , N. Rama Rao

Abstract

Eucalyptus citriodora Hook. was introduced in the shelterbelt zone in traditional plantations of CasuQrina equisetijolia L. The plantations were raised in 3 ha through the coastal Vana Samrakshana Samithi at Chippada in Visakhapatnam district of Andhra Pradesh. Mixed plantations of the two species were tried in two independent blocks adopting 3 × 3 m and 2.5 × 2.5 m spacings separately. In addition, monospecific plantation of E. citriodora was tried independently in 2 × 2 m spacing. Striking difference could not be noticed in the yield of essential oil from E. citriodora obtained from the three kinds of spacings employed. However, mixed plantation with 2.5 × 2.S m spacing gave relatively better oil yield than the other two spacings. Average essential oil yield from the entire plantation area of 3 ha during each quarter from the third year onwards was 2.334 L priced at ' 300/- kg. The timber yield from C. equisetifolia on their attaining commercially exploitable size after five years was approxi mated to be 30 m³.

Keywords

Casuarina Equisetifolia, Eucalyptus Citriodora, Essential Oil, Augmentation, Village Communities

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M. V. Rao ¹, R. Sharma Seema ¹, S. Parekh ¹

Affiliations
1 DST-FIST Sponsored Department of Zoology, Reproductive Biology and Toxicology Unit, School of Sciences, Gujarat University, Ahmedabad-389009, IN

Abstract

Effects of oral administration of nickel chloride at doses of 8 and 16mg/kg body weight and potassium dichromate at doses of 5 and 10 mg/kg body weight in female mice (Mus musculus) for 30 days were investigated. The body and organ weight were not significantly affected by nickel or chromium treatments. But combined treatment of nickel and chromium showed a reduction in these weights. Irregularity in cyclicity of the female was also observed in these treated groups as compared to the normal groups.

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M. V. Rao ¹, S. S. Parekh ¹, S. Sharma ¹

Affiliations
1 DST-FIST sponsored Department of Zoology, Reproductive Biology and Toxicology Unit, School of Sciences, Gujarat University, Ahmedabad-380 009, IN

Abstract

Effects of oral administration of potassium dichromate at doses of 5 and 10mg/kg body weight and nickel chloride at doses of 8 and 16mg/kg body weight respectively on liver and blood of mice (Mus musculus) were investigated for 30 days. The body and organ weight were not significantly affected in nickel and chromium treated groups, but combination treatments affected these wrights.

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S. Vijay ¹, J. L. Lalitha ¹, M. V. Rao ¹, A. Gopala Krishna ²

Affiliations
1 Mechanical Engg. Dept., Bapatla Engg. College, Bapatla, IN
2 Dept. of Mechanical Engg., JNTU, Kakinada, IN

Abstract

The emerging technology in manufacturing is Rapid Prototyping, by which one can fabricate the functional testing parts within less time. Rapid Prototyping (RP) includes different techniques viz., Stereolithography (SLA), Selective Laser Sintering (SLS), Fused Deposition Modeling (FDM), 3D Printing etc., In some RP processes, the extended portion of the part needs the support material. The support materials differ from part material, which is useful only for supporting purpose. After fabricating the parts the support material has to be discarded from the part. As per the cost criteria, the cost of the support materials ranges between 30-40% of the total cost depending on the geometries. While fabricating the part, the support material has to sustain the weight of the extended parts and its forces. The thermal stresses induced in the support material due to difference in temperatures of part and support material while solidifying process should also be taken into consideration. The paper concentrates on the volume reduction of the support material for basic geometries without losing the functional requirements of the support material. Finite Element Method has been applied for stresses and thermal analysis. The values thus found conclude that there is a possibility to reduce the volume of the support material for about 10-15% depending on geometry of the part and thereby reduces the cost of fabrication.

Keywords

Support Material, Rapid Prototyping, Volume Reduction, Basic Geometries.

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