Informatics Publishing Limited

M. Sriram ¹, P. Renuka Devi ¹

Affiliations
1 Department of Management Sciences, D.J.Academy for Managerial Excellence, Coimbatore

Abstract

The presence of seasonal/monthly effect in stock returns was investigated using monthly return data of BSE Sensex for the period April 2004 to March 2012. After examining the stationarity of the return series, an Autoregressive Moving Average (ARMA) model is specified to find the monthly effect in stock returns. The results do not confirm the existence of seasonality in stock returns and the January effect. The findings are also inconsistent with 'Tax-loss selling' hypothesis. The results of the study imply that the stock market is efficient. The study suggests analysing the 'Day of the Week' effect to enable the investors to devise better strategies to improve their returns.

Keywords

Stationarity, Seasonality, ARMA, Tax-Selling Hypothesis, Market Efficiency

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K. P. Sreejisha ¹, P. Renuka Devi ¹

Affiliations
1 Biotechnology, Anna University, Coimbatore, IN

Abstract

High surface area nanorods  of  amorphous TiO2 with anatase structure were synthesized and the samples characterized by  diffused reflectance spectroscopy, scanning electron microscopy (SEM), X-ray powder diffraction (XRD),the Brunauer-Emmett-Teller (BET) method, The nanosheet structure was slightly curved and approximately  100-200 nm in width and several nanometers in thickness. The BET surface area is about 192.845 m²/g for 0.5592 g and with a  band gap of  3.25.

Keywords

High Surface Area, Nanosheets, TIO2, Anatase, Amorphous.

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M. Suganyadevi ¹, P. Renuka Devi ¹, S. Nakkeeran ¹

Affiliations
1 Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN

Abstract

Bacterial blight of Anthurium incited by Xanthomonas axonopodis pv. dieffenbachiae (XAD) is one of the most serious and devastating disease causes severe losses to cut flower production. In vitro screening of antagonistic B. mojavensis strain KA3 inhibited the growth of X. axonopodis pv. dieffenbachiae over an area of 3730 mm². It was followed by B. subtilis isolate BSD4, which inhibited the pathogenic bacteria to an extent of 3430 mm². In vitro screening with bactericides and fungicides against X. axonopodis pv. dieffenbachiae reflected that streptomycin sulphate was most effective in inhibiting the bacterial blight pathogen at 2000 ppm which confers an area of inhibition of 1810 mm², which was significantly superior over all other treatments and succeeded by 1000 ppm of streptomycin sulphate, which recorded 1254 mm² area of inhibition against XAD. Screening with gentamycin, indicated that the mean maximum area of inhibition of the bacterial pathogen XAD was 1054 mm² at 2000 ppm against XAD under in vitro. However, comparison of the efficacy between streptomycin sulphate and gentamycin, indicated that, streptomycin sulphate was highly effective rather than gentamycin. Similarly, fungicides such as copper oxychloride, alliete, isotianil and bromopol (2-bromo 2-nitro propane 1, 3-diol) which had antibacterial activity were tested against XAD under in vitro.

Keywords

In vitro, Anthurium, Bactericides and Fungicides.

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