E. coli AB 1157 susceptibility test, MTT assay on MCF-7 and HeLa cell lines of root and leaf fractions of Viburnum Linn. species

525-530The aim of this study was to evaluate mutagenic bacterial susceptibility and cytotoxic potency of Viburnum coriaceum Blume and Viburnum erubescens Wall.ex DC in order to report the actual chemotherapeutic potentials of these two species. The methanolic (80%) leaf and chloroform root extracts of Viburnum Linn. Species were tested for their bacterial strain based cytotoxicity employing Agar diffusion method suing E. coli AB 1157 strain. Also, the MTT assay was carried out employing MCF-7 breast cancer cell lines and HeLa cervical cell lines. It was started with IC50 value determination of the selected test extracts from the results of bacterial strain based cytotoxicity. Upon increase in concentration up to 1000 µg/mL in agar diffusion cytotoxicity studies VCMLE, VEMLE and VCCRE had shown diameter of inhibition zone 10 mm, 9 mm and 10 mm respectively. Among other extracts, the VEMLE and VCCRE were selected to go ahead with anticancer activity by MTT assay. The potentials of extracts through cytotoxicity mechanism had produced 30-40% protection against cancer cell lines. It was concluded that VEMLE and VCCRE had produced the cytotoxic effect on E. coli AB 1157 strain. and were selected for the cytotoxic studies. The effects exhibited by the selected extracts may be due to the presence of diverse number of active constituents present in Viburnum Linn species also may be to the presence of unreported constituents

E. coli AB 1157 susceptibility test, MTT assay on MCF-7 and HeLa cell lines of root and leaf fractions of Viburnum Linn. species

The aim of this study was to evaluate mutagenic bacterial susceptibility and cytotoxic potency of Viburnum coriaceumBlume and Viburnum erubescens Wall.ex DC in order to report the actual chemotherapeutic potentials of these two species.The methanolic (80%) leaf and chloroform root extracts of Viburnum Linn. Species were tested for their bacterial strainbased cytotoxicity employing Agar diffusion method suing E. coli AB 1157 strain. Also, the MTT assay was carried outemploying MCF-7 breast cancer cell lines and HeLa cervical cell lines. It was started with IC50 value determination of theselected test extracts from the results of bacterial strain based cytotoxicity. Upon increase in concentration up to 1000μg/mL in agar diffusion cytotoxicity studies VCMLE, VEMLE and VCCRE had shown diameter of inhibition zone 10 mm,9 mm and 10 mm respectively. Among other extracts, the VEMLE and VCCRE were selected to go ahead with anticanceractivity by MTT assay. The potentials of extracts through cytotoxicity mechanism had produced 30-40% protection againstcancer cell lines. It was concluded that VEMLE and VCCRE had produced the cytotoxic effect on E. coli AB 1157 strain.and were selected for the cytotoxic studies. The effects exhibited by the selected extracts may be due to the presenceof diverse number of active constituents present in Viburnum Linn species also may be to the presence ofunreported constituents

Tool and work piece vibrations measurement - a review

Tool condition monitoring is one of the important aspects in machining process to improve tool life. It comprises three important steps namely machining data acquisition, data analysis and decision making. Vibration in metal cutting has direct impact on the tool life as well as surface roughness. The present study focused on measurement of vibration during the machining process. Data acquisition is made by using various types of sensors. A wide variety of technologies like contact and non contact sensors have been used for real time data acquisition of tool or work piece vibrations. Research works carried out by many authors is highlighted in measurement of cutting tool and machine tool vibrations using different sensors. Influence of various input parameters like tool geometry, feed, speed and depth of cut on the magnitude of vibrations is discussed. Influence of vibration on surface roughness, tool life and power consumption is reviewed. Three dimensional vibration measurement with single Laser Doppler Vibrometer is also covered for precise analysis of vibration

A NEW SPEECH ENHANCEMENT TECHNIQUE USING PERCEPTUAL CONSTRAINED SPECTRAL WEIGHTING FACTORS

This paper deals with musical noise result from perceptual speech enhancement type algorithms and especially wiener filtering. Although perceptual speech enhancement methods perform better than the non perceptual methods, most of them still return annoying residual musical noise. This is due to the fact that if only noise above the noise masking threshold is filtered then noise below the noise masking threshold can become audible if its maskers are filtered. It can affect the performance of perceptual speech enhancement method that process audible noise only. In order to overcome this drawback here proposed a new speech enhancement technique. It aims to improve the quality of the enhanced speech signal provided by perceptual wiener filtering by controlling the latter via a second filter regarded as a psychoacoustically motivated weighting factor. The simulation results shows that the performance is improved compared to other perceptual speech enhancement method

Synthesis and Characterization of Er Doped CaZrO3 Phosphors

The present paper reports the synthesis and Photoluminescence (PL) studies of the Er rare earth ions doped in CaZrO3 phosphor at a concentration of 2 mol%. Starting materials like Calcium carbonate (CaCO3), Zirconium oxide(ZrO2),Erbium Oxide (Er2O3). The samples were prepared by the conventional solid-state reaction method, which is the most suitable for large-scale product ion. The received phosphor samples were characterized using XRD, SEM and PL techniques. Undoped CaZrO3 exhibits good photoluminescence emission. The PL emission mainly concentrates around 467 nm, when excited with 254 nm wavelengths. The CaZrO3 phosphor, when doped with Er the PL emission was observed from 400 to 560 nm range peaks around 527 ,531,545 and 553nm with high intensity. The present phosphor can act as host for greenlight emission in compact fluorescent (CFL) and fluorescent lamps

Atom Connectivity and Connectivity Energy of few Molecules

For a given chemical compound, a molecular graph could be constructed. The total of the absolute measures of Eigen values taken from adjacency matrix of the molecular graph for the assumed chemical compound is known as the energy of graph. It has been observed that, the adjacency matrix derived from the molecular graph has no information about the atoms and bonds connected. To overcome this limitation, we have considered the atom-connectivity and connectivity matrix which give more information about the classification of bonds and atom- connectivity of a chemical compound in the molecular graph. In this paper, we enhance our results on the atom connectivity energy graph and also few hydrocarbons are compared with the ordinary energy

PAN SHARPENING USING RELATIVE SPECTRAL RESPONSE OF SENSOR FOR CARTOSAT-1 PAN AND RESOURCESAT LISS-4 MX DATA

Most of the Indian remote sensing systems, provide sensors with one high spatial resolution panchromatic (PAN) and several multispectral (MS) bands. An increasing number of applications, such as feature detection, change monitoring, and land cover classification, often demand the use of images with both high spatial and high spectral resolution. Image fusion or pan sharpening, is a technique to enhance the spatial resolution. The most significant problem in the traditional fusion methods is spectral distortion of fused images. The main reason for this being, the physical spectral characteristic of the sensors are not considered during the fusion process, resulting in undesirable effects such as modified spectral signatures resulting in classification errors and resolution over injection. For most earth resource satellites which provide both PAN and MS bands, in ideal condition, all MS bands would be well separated and would cover exactly the same wavelengths as the PAN band. Theoretically, the measured energy in the PAN band can be obtained with the summation of corresponding MS bands. As the measured energy in an individual channel is the sum of incoming radiation and relative spectral response: Lk&thinsp;=&thinsp;L(&lambda;)&thinsp;Rk(&lambda;); where &lambda; is the wavelength, the in-band radiance, L(&lambda;) at aperture spectral radiance and Rk(&lambda;) the peak-normalized spectral response. Therefore, the energy in PAN band can be estimated by defining weights as follows: Pan&thinsp;=&thinsp;wR&thinsp;R&thinsp;+&thinsp;wG&thinsp;G&thinsp;+&thinsp;wNIR NIR&thinsp;+ other; where Pan, G, R, NIR represent the radiance of individual spectral bands wG, wR, wNIR are the weights of corresponding MS bands and other for the influence of the spectral range which is missing from MS bands but still covered with the PAN band. In this paper, a novel spectral preservation fusion method for remotely sensed images using Cartosat-1 PAN and Resourcesat-Liss4 Mx data is presented by considering the physical characteristics of the sensors. It is based on the curvelet transform using relative spectral response (RSR) values of the sensor, improved in two parts: 1) the construction of PAN image using RSR values and the curvelet components, 2) the injection method of detail information. The performance and efficiency of the proposed method is compared with traditional IHS, wavelet based methods both visually and quantitatively. The results show that the proposed method preserves spatial details and minimize spectral distortion.</p