http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Vidhya Selvamani,Murali Kannan Maruthamuthu,Kulandaisamy Arulsamy,엄경태,홍순호 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.6
Methylobacterium organophilum XX is a type II facultative methylotroph that can grow on methanol. In M. organophilum XX, the MxcQ/MxcE two-component system (TCS) is involved in methanol metabolism. EnvZ/OmpR in E. coli TCS was exploited to develop a methanol biosensor by engaging the MxcQ/MxcE TCS system. The MxcQZ/ OmpR methanol sensing chimeric TCS was constructed by integrating the sensing domain of M. organophilum MxcQ with the transmitter domain of E. coli EnvZ. The response regulator of the chimeric TCS system is OmpR, which regulates the expression of the ompC and gfp. The expression of ompC was monitored by real-time quantitative PCR analysis. The expression of gfp also confirmed the expression of the ompC. The maximum expression of ompC and gfp occurred with 0.05% of methanol, and the expression started to decline with further increases in methanol concentration. This system delivers rapid detection of methanol in the environment.
Vidhya Ambadath,Renju Gopal Venu,Indira Madambath 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.6
This study compares the curative effect of three antioxidants—ascorbic acid, quercetin, and thiamine—on ethanol-induced toxicity in rats. Administration of ethanol at a dose of 4g/kg of body weight/day for 90 days initiated chronic alcohol-induced oxidative stress as shown by increased malondialdehyde level and DNA fragmentation in liver and brain. Ethanol administration also led to a decrease in DNA content. Activities of toxicity marker enzymes—alanine aminotransferase, aspartate aminotransferase, and γ-glutamyltranspeptidase—in liver and serum increased progressively upon ethanol administration. After ethanol administration for 90 days, the efficacy of antioxidant treatment of the alcohol-induced toxicity was studied by supplementing ascorbic acid (200mg/100g of body weight/day), quercetin (50mg/kg of body weight/day), and thiamine (25mg/kg of body weight/day) for 30 days. These groups were compared with the abstention group (not treated with ethanol). All the alterations induced by alcohol were reduced significantly by the supplementation of antioxidants and also with abstention. The regression by antioxidants was greater that of abstention. Antioxidants significantly reduced the oxidative stress induced by ethanol intoxication, increased membrane integrity, and also increased organ regeneration. Ascorbic acid was shown to be more effective than quercetin and thiamine in treating both hepatotoxicity and neurotoxicity induced by alcohol administration. This may be due to the higher antioxidant potential of ascorbic acid in physiological conditions.
ON gprμ-CLOSED MAPPINGS AND gprμ-OPEN MAPPINGS
Vidhya Menon,Gnanambal Ilango 영남수학회 2017 East Asian mathematical journal Vol.33 No.5
Inthispaperwedefinenewtypesofmappingsknownasgprμ- closed mappings, gprμ-open mappings and discuss its properties. Fur- thermore we introduce the concepts of supra pre∗-normal spaces and also investigate its properties.
Vidhya Selvamani,정재훈,Murali Kannan Maruthamuthu,Kulandaisamy Arulsamy,나정걸,홍순호 한국생물공학회 2023 Biotechnology and Bioprocess Engineering Vol.28 No.2
Lithium is one of the highly used elements in various industries such as ceramics, polymer and battery. Considering the enormous demand of lithium based battery, the importance of lithium is getting higher in these days. To recover lithium in environmentally friendly manner, lithium binding peptide displaying recombinant Escherchia coli was constructed. The display of peptide was conceived by employing OmpC as an anchoring motif. The ability of the peptide to bind lithium was evaluated in three different media, and the selectivity of the peptide towards lithium was estimated. The physio-chemical and optical parameter of the adsorbed lithium nanoparticles was evaluated by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), UV, and Raman spectroscopy.
Vidhya Kaniyappan,Regina Mary Rathinasamy,Job Gopinath Manivanan 사단법인 한국질량분석학회 2022 Mass spectrometry letters Vol.13 No.4
Banana peels are also widely used as bio-adsorbent in the removal of chemicals contaminants and heavy metals from water and soil. GC-MS plays an essential role in the phytochemical analysis and chemo taxonomic studies of medicinal plants con- taining biologically active components. Intrinsically, with the use of the flame ionization detector and the electron capture detector which have very high sensitivities, Gas chromatography can quantitatively determine materials present at very low concentrations and most important application is in pollution studies. In the present study banana peels were used as bio-adsorbent to remediate the heavy metal contaminated water taken from three different stations located around the industrial belts of Ranipet, Tamilnadu, India. The AAS analysis of the samples shows a decrement of chromium concentration of 98.93%, 96.16% and 96.5% in Station 1, 2 and 3 respectively which proves the efficiency of the powdered peels of Musa paradisiaca. The GC-MS analysis of the control and treated peels of Musa paradisiaca reveals the presence of phytochemicals like Acetic Acid, 1-Methylethyl Ester, DL-Glyceraldehyde Dimer, N-Hexadecanoic Acid, 3-Decyn-2-Ol, 26-Hydroxy, Cholesterol, Ergost-25-Ene-3,5,6,12-Tetrol, (3.Beta.,5.Alpha.,6.Beta.,12.Beta.)-, 1-Methylene-2b- Hydroxymethyl-3, and 3-Dimethyl-4b-(3-Methylbut-2-Enyl)-Cyclohexane in the control banana peels. The banana peels which were used for the treatment reveals the changes and alteration of the phytochemicals. It is concluded that the alteration in phytochemicals of the experimental banana peels were due to adsorption of chromium heavy metal from the sample.
Medical Image Compression using Adaptive Subband Threshold
Vidhya K 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.2
Medical imaging techniques such as Magnetic Resonance Imaging (MRI), Computed Tomography (CT) and Ultrasound (US) produce a large amount of digital medical images. Hence, compression of digital images becomes essential and is very much desired in medical applications to solve both storage and transmission problems. But at the same time, an efficient image compression scheme that reduces the size of medical images without sacrificing diagnostic information is required. This paper proposes a novel threshold-based medical image compression algorithm to reduce the size of the medical image without degradation in the diagnostic information. This algorithm discusses a novel type of thresholding to maximize Compression Ratio (CR) without sacrificing diagnostic information. The compression algorithm is designed to get image with high optimum compression efficiency and also with high fidelity, especially for Peak Signal to Noise Ratio (PSNR) greater than or equal to 36 dB. This value of PSNR is chosen because it has been suggested by previous researchers that medical images, if have PSNR from 30 dB to 50 dB, will retain diagnostic information. The compression algorithm utilizes one-level wavelet decomposition with threshold-based coefficient selection.
( Vidhya Selvamani ),( Irisappan Ganesh ),( Sowon Chae ),( Murali Kannan Maruthamuthu ),( Soon Ho Hong ) 한국미생물 · 생명공학회 2020 한국미생물·생명공학회지 Vol.48 No.1
Five genes (mxbDM, mxcQE and mxaB) are responsible for the transcription of methanol oxidation genes in Methylobacterium strains. Among these, MxbDM and MxcQE constitute the two-component system (TCS) regulating methanol metabolism. In this study, we integrated the methanol-sensing domain of MxbD and MxcQ with the EnvZ/OmpR from Escherichia coli. The domain-swapping strategy resulted in chimeric histidine kinases (HK’s) MxbDZ and MxcQZ AM1 containing recombinant E. coli. Real-time quantitative PCR was used to monitor OmpC expression mediated by the chimeric HK and response regulator (RR) OmpR. Further, an ompC promoter based fluorescent biosensor for sensing methanol was developed. GFP fluorescence was studied both qualitatively and quantitatively in response to environmental methanol. GFP measurement also confirmed ompC expression. Maximum fluorescence was observed at 0.05% methanol and 0.01% methanol using MxbDZ and MxcQZ AM1, respectively. Thus the chimeric HK containing E. coli were found to be highly sensitive to methanol, resulting in a rapid response making them an ideal sensor.
Vidhya Selvamani,Irisappan Ganesh,Murali Kannan Maruthamuthu,엄경태,홍순호 한국생물공학회 2017 Biotechnology and Bioprocess Engineering Vol.22 No.3
Escherichia coli does not have the methanol sensing apparatus, was engineered to sense methanol by employing chimeric two-component system (TCS) strategy. A chimeric FlhS/EnvZ (FlhSZ) chimeric histidine kinase (HK) was constructed by fusing the sensing domain of Paracoccus denitrificans FlhS with the catalytic domain of E. coli EnvZ. The constructed chimeric TCS FlhSZ/OmpR could sense methanol by the expression of ompC and gfp gene regulated by ompC promoter. Real-time quantitative PCR analysis and GFP-based fluorescence analysis showed the dynamic response of the chimeric TCS to methanol. The expression of ompC and the gfp fluorescence was maximum at 0.01 and 0.5% of methanol, respectively. These results suggested that E. coli was successfully engineered to sense methanol by the introduction of chimeric HK FlhSZ. This strategy can be employed for the construction of several chimeric TCS based bacterial biosensors for the development of biochemical producing recombinant microorganisms.
Complex Neural Classifiers for Power Quality Data Mining
Vidhya, S.,Kamaraj, V. The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.4
This work investigates the performance of fully complex- valued radial basis function network(FC-RBF) and complex extreme learning machine (CELM) based neural approaches for classification of power quality disturbances. This work engages the use of S-Transform to extract the features relating to single and combined power quality disturbances. The performance of the classifiers are compared with their real valued counterparts namely extreme learning machine(ELM) and support vector machine(SVM) in terms of convergence and classification ability. The results signify the suitability of complex valued classifiers for power quality disturbance classification.