Informatics Publishing Limited

R. Mythili , M. Gomathy , B. Yazhini , D. Madhumitha

Abstract

The main objective is to analyze a new highly efficient topology for power factor correction. By eliminating the input bridge diodes, the efficiency is improved. Due to the increasing demand of these devices, the line current harmonics pose a major problem by degrading the power factor of the system thus affecting the performance of the devices. Hence there is a need to reduce the line current harmonics so as to improve the power factor of the system. This has led to designing of Power Factor Correction circuits. In our project work we have designed an active power factor circuit using Buck Converter for improving the power factor. The proposed converter is analyzed and the theoretical and simulation results of the converter are presented.

Keywords

Power Factor Correction (PFC), Buckconverter, Bridgeless Rectification.

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K. Ananthi ¹, M. Karuppaiya ², T. Anand ³, M. Gomathy ⁴

Affiliations
1 Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
2 Department of Agricultural Entomology, C.C.S. Haryana Agricultural University, Hisar (Haryana), IN
3 Cotton Research Station, Veppanthattai (T.N.), IN
4 Maize Research Station, Vagarai, Palani (T.N.), IN

Abstract

Continuous adaption of cereal-based cropping system has necessitated other alternatives such as pulses, which constitute a major part in agricultural economy of India. An experiment was conducted at Millet Breeding Station, TNAU, Coimbatore during Kharif (July, 2006 - October, 2006) in CO 6 green gram with nine different treatments. The yield and yield components were significantly increased by the application of chemicals and bioregulators. Various yield components such as days to 50 per cent flowering, days to maturity, number of clusters per plant, number of flowers per plant, number of pods per cluster, number of pods per plant, fertility co-efficient, number of seeds per pod, pod weight per plant, seed weight per plant, seed - pod ratio, pod length, hundred seed weight, grain yield per plot, grain yield per hectare and harvest index were favorably enhanced by the foliar spray of 0.1 per cent humic acid with 0.1 ppm brassinosteroid treatment.

Keywords

Bio Regulators, Greengram, Yield.

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M. Gomathy ¹, M. Thangaraju ¹, C. Sarathambal ¹

Affiliations
1 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN

Abstract

The survival of the Bacillus cultures on the seeds of the maize was tried in different combinations. One ml inoculum with one ml adhesive combination or sterile water showed better results followed by 1.5 ml inoculum with 0.5 ml adhesive or sterile water. In 1.5 ml inoculum and 0.5 ml adhesive combination, adherence and survival population of phosphobacterial cells were maximum (6.5×10⁵ cfu/seed) for the treatment of sporulated inoculum with rice gruel.

Keywords

Phosphobacteria, Liquid Inoculum, Maize.

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C. Sarathambal ¹, M. Thangaraju ¹, M. Gomathy ¹

Affiliations
1 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN

Abstract

Zinc deficiency was created in maize seedlings in the sand culture and deficiency was rectified with the addition of insoluble zinc sources and G. diazotrophicus. The basic strategy behind this approach is decreasing the pH and making zinc soluble and as a consequence, the available zinc will get increased in the soil system. Since lowering of soil pH to 5 or below increases the Zn solubility. The plant growth, chlorophyll content and plant zinc content were found to be enhanced due to inoculation of G. diazotrophicus with insoluble zinc compounds.

Keywords

G. diazotrophicus, Zinc Solubilization, Chlorophyll Content.

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