Studies on Interaction of Essential Metal Ions with Bioactive Ligands

Brij Bhushan Tewari* 대한화학회 2004 Bulletin of the Korean Chemical Society Vol.25 No.6

Noise Removal Technique for Document Images

Brij Mohan Singh,Mridula,Kamal Kant Verma 한국멀티미디어학회 2023 The journal of multimedia information system Vol.10 No.1

The documents may contain noise at the time of scanning, transmission or during converting into it in digital form. The noise may be categorized after finding the features and may find the same patterns in the document image in order to obtain the accurate method for their elimination. The removal of noise from the document image is an important phase for the development of high-quality Optical Character Recognition (OCR) system. To make this possible, this paper presents a robust noise removal method for the noised natural document images. As per proposed algorithm, the connected black pixels are identified and determined the number of pixels they contained. Then from the collected data, density of the black pixels below which all the connected pixels represent noise is calculated. Those pixels having value less then calculated values are removed. The results of proposed approach were tested against Weiner, Median, and Average filters. The value of standard performance measures such as PSNR, F-measure and NRM are 22.77 dB, 82.36 and 1.09 for test image1, 22.46 dB, 96.63% and 1.409 for test image2, 22.79 dB, 96.22% and 0.7927 for test image3, 24.01 dB, 96.63% and 0.3739 for test image4, 24.64 dB, 97.7949, and .4833 for test image5. The obtained results of proposed approach are better as compare to average, Weiner and Median filters.

Quantum Sensing Research: A Scientometric Assessment of Global Publications during 1991-2020

Brij Mohan Gupta,Surinder Mohan Dhawan,Ghouse Modin Mamdapur 건국대학교 GLOCAL(글로컬)캠퍼스 지식콘텐츠연구소 2022 International Journal of Knowledge Content Develop Vol.12 No.3

The study presents a global research scenario in the domain of quantum sensing in quantitative and qualitative terms. The study is based on an analysis of 588 global publications in the field, sourced from the Scopus database for the period 1991-2020. The study identified key countries, organizations and authors, network collaborative linkages at national, institutional, and author level. In addition, it identified broad subject areas intersecting quantum sensing research, key journals for research communications, and broad characteristics of highly-cited papers. The study finds that the USA and Germany lead the world ranking in quantum sensing research with a combined share of 50% to the global output. The USA, Germany, and Italy are the home countries to 13 of the top 15 most productive organizations, and also the home countries to 14 of the top 15 most productive authors in the subject. The top journals publishing most research publications are Physical Review A, Physical Review Letters and New Journal of Physics. However, in the most cited journals list in the subject, Agriculture & Forest Meterology, Science and Physical Review A tops the list.

Paper Ionophoretic Technique in the Study of Mixed Complexes

Tewari, Brij Bhushan Korean Chemical Society 2002 Bulletin of the Korean Chemical Society Vol.23 No.5

Stability constants of complexes of aluminium(III) and thorium(IV) with methionine and cysteine have been determined by modified paper electrophoretic technique at $\mu$ = 0.1 M. The proportion of ionic species of methionine and cysteine were varied by changing pH of background electrolyte. The stability constants of the complexes metal-methionine-cysteine have been found to be 4.31 ± 0.12 and 5.40 ± 0.19 (log K values) for $Al^{3+}\;and\;Th^{4+} $ complexes, at temperature 35 ${^{\circ}C}$, respectively.

Studies on Interaction of Essential Metal Ions with Bioactive Ligands

Tewari, Brij Bhushan Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.6

Complexation reactions of nitrilotriacetate (NTA) and penicillamine with $Cu^{2+}$ and $Co^{2+}$ have been studied in solution phase using paper electrophoresis technique. The stability constants of the complexes Cu(II)-nitrilotriacetate-penicillamine and Co(II)-nitrilotriacetate-penicillamine have been found to be $6.64{\pm}0.03\;and\;5.86{\pm}0.05$ (logarithm stability constant values), respectively at 35$^{\circ}C$ and ionic strength 0.1 M.

Fabrication of microwave assisted biogenic magnetite-biochar nanocomposite: A green adsorbent from jackfruit peel for removal and recovery of nutrients in water sample

A. Nayak,Brij Bhushan,Vartika Gupta,Shreya Kotnala 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.100 No.-

Presence of nutrients in municipal sewage water in high concentrations has raised awareness of theirreuse as a vital limiting resource. With an aim to recover the nutrients in a form that can be used as a soilamendment, a novel biocompatible nanocomposite (BC-P@MNP) was fabricated using green methods. Polysaccharide induced biogenic magnetite nanoparticles (P@MNP) were immobilized onto the biocharof jackfruit peel (BC) to fabricate BC-P@MNP. Microwave irradiation employed during the fabrication ofBC-P@MNP involved less energy consumption, high yields and better adsorption performance ascompared to BC and other reported biochar-composites. Structural features like mesoporosity,crystallinity, magnetism, functionality and nano-sized dimension was demonstrated in BC-P@MNP. Under optimized conditions, batch studies revealed a maximum adsorption efficiency of 7.94 mg/g and5.26 mg/g for phosphates and nitrates respectively. Thermodynamics revealed the feasibility andexothermicity of the system. The high selectivity in the presence of competing co-anions, highregeneration capacity and better separability enable BC-P@MNP to be used as advanced, economicaladsorbent for wastewater applications. High nutrient recovery and biocompatibility ensured thepotential of the spent adsorbent to be used as a soil amendment. Breakthrough curves obtained fromfixed-bed column tests conducted on agricultural wastewater demonstrated the use of higher bed depthsand lowerflow rates for achieving higher phosphate removal as well as for ensuring lower unusedcolumn bed. The study demonstrated the technological advancement of a biogenic nanocompositefabricated from green methods over other reported adsorbents for removal and recovery of nutrientsfrom water. © 2021 The Korean

Enhanced Soil Health for Sustaining Higher Productivity and Food Security in India

A Subba Rao,Brij Lal Lakaria 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Comparative expression analysis of defense-related genes in both transgenic and nontransgenic Brassica juncea (var.) Varuna harbouring overexpressed MAPK3 gene in response to infection by Albugo candida

Modak Annayasa,Singh Brij Raj,Dubey Ashutosh,Tewari A. K.,Taj Gohar 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.1

White rust, a devastating disease of Brassicaceae family, causes nearly 60% reduction in yield of Brassica juncea (Indian mustard). This dreadful disease is caused by oomycetes fungi Albugo candida. A comparative expression analysis of MAPKs cascade and some of defense-related genes in nontransgenic and transgenic (harbouring overexpressed MAPK3) cultivar of Brassica juncea were done to reveal the defense signalling pathway against biotrophic fungi Albugo candida. Disease indexing was also done to compare the disease severity in both transgenic and nontransgenic Brassica juncea cultivars. Lower disease index in transgenic Brassica suggests its tolerance to Albugo candida. Higher expression level of MAPK6 in comparison to MAPK3 in the transgenic Brassica indicates that MAPK6 mimics a portion of MAPK3 signalling pathway and work in a direct cascade for production of defense-related proteins. Overexpression of MAPK3 gene was observed in downregulating the expression of MAPK4 in transgenic Brassica juncea. The expression of two important transcription factors, such as WRKY33 and WRKY29 were also analyzed in the present study and were found to be higher in transgenic plant overexpressing MAPK3. The expression of three defense-related genes (OASTL-B, ACD2 and CSD2) was found to be increased in transgenic plants harbouring overexpressed MAPK3 gene; however, expression level of CYP20-3 was found higher in nontransgenic Brassica plant in response to pathogen infection. These four defense-related genes were also subjected to in silico studies, such as secondary structure, tertiary structure and putative phosphorylation sites prediction in addition to protein–protein interaction determination with potential MAPKs cascade and WRKY29, WRKY33.

Boron Detection Technique in Silicon Thin Film Using Dynamic Time of Flight Secondary Ion Mass Spectrometry

( M. Abul Hossion ),( Brij M. Arora ) 한국질량분석학회 2021 Mass spectrometry letters Vol.12 No.1

The impurity concentration is a crucial parameter for semiconductor thin films. Evaluating the impurity distribution in silicon thin film is another challenge. In this study, we have investigated the doping concentration of boron in silicon thin film using time of flight secondary ion mass spectrometry in dynamic mode of operation. Boron doped silicon film was grown on i) p-type silicon wafer and ii) borosilicate glass using hot wire chemical vapor deposition technique for possible applications in optoelectronic devices. Using well-tuned SIMS measurement recipe, we have detected the boron counts 10¹~10⁴ along with the silicon matrix element. The secondary ion beam sputtering area, sputtering duration and mass analyser analysing duration were used as key variables for the tuning of the recipe. The quantitative analysis of counts to concentration conversion was done following standard relative sensitivity factor. The concentration of boron in silicon was determined 10¹⁷~10²¹ atoms/㎤. The technique will be useful for evaluating distributions of various dopants (arsenic, phosphorous, bismuth etc.) in silicon thin film efficiently.

Estimation of Phosphorus Concentration in Silicon Thin Film on Glass Using ToF-SIMS

( M. Abul Hossion ),( Karthick Murukesan ),( Brij M. Arora ) 한국질량분석학회 2021 Mass spectrometry letters Vol.12 No.2

Evaluating the impurity concentrations in semiconductor thin films using time of flight secondary ion mass spectrometry (ToF-SIMS) is an effective technique. The mass interference between isotopes and matrix element in data interpretation makes the process complex. In this study, we have investigated the doping concentration of phosphorus in, phosphorus doped silicon thin film on glass using ToF-SIMS in the dynamic mode of operation. To overcome the mass interference between phosphorus and silicon isotopes, the quantitative analysis of counts to concentration conversion was done following two routes, standard relative sensitivity factor (RSF) and SIMetric software estimation. Phosphorus doped silicon thin film of 180 nm was grown on glass substrate using hot wire chemical vapor deposition technique for possible applications in optoelectronic devices. Using ToF-SIMS, the phosphorus-31 isotopes were detected in the range of 101~104 counts. The silicon isotopes matrix element was measured from p-type silicon wafer from a separate measurement to avoid mass interference. For the both procedures, the phosphorus concentration versus depth profiles were plotted which agree with a percent difference of about 3% at 100 nm depth. The concentration of phosphorus in silicon was determined in the range of 1019~1021 atoms/cm3. The technique will be useful for estimating distributions of various dopants in the silicon thin film grown on glass using ToF-SIMS overcoming the mass interference between isotopes.