ABSORBING PAIRS FACILITATING COMMON FIXED POINT THEOREMS FOR LIPSCHITZIAN TYPE MAPPINGS IN SYMMETRIC SPACES

Gopal, Dhananjay,Hasan, Mohammad,Imdad, Mohammad Korean Mathematical Society 2012 대한수학회논문집 Vol.27 No.2

The purpose of this paper is to improve certain results proved in a recent paper of Soliman et al. [20]. These results are the outcome of utilizing the idea of absorbing pairs due to Gopal et al. [6] as opposed to two conditions namely: weak compatibility and the peculiar condition initiated by Pant [15] to ascertain the common fixed points of Lipschitzian mappings. Some illustrative examples are also furnished to highlight the realized improvements.

Estimation of Freight Demand at Mumbai Port using Regression and Time Series Models

Gopal R. Patil,Prasanta K. Sahu 대한토목학회 2016 KSCE JOURNAL OF CIVIL ENGINEERING Vol.20 No.5

Forecasting future freight demand at a seaport is important for its planning and development. India has 13 major ports which handle 75% of the total seaport freight. Among the 13 major ports, Mumbai Port, ranked at number three in the country for the year 2013-14, handles about 11% of the total freight at major seaports in India. The focus of this paper is on developing inbound and outbound demand forecasting models for Mumbai Port. The models are developed using additive regression and time series techniques. In regression analysis economic indicators, Gross Domestic Product (GDP) and Crude Oil Production (CRLP) are found to be significant. The multivariate models performed better than the univariate models. The validation of time-series models resulted in error of less than 5%. Both multivariate regression and time-series models are used to forecast freight demand for the years 2014- 15 through 2017-18. The regression models are producing more optimistic forecasts than the time series models. The elasticity analysis suggested that Mumbai’s inbound freight will be growing almost with India’s GDP growth rate, the outbound freight, however, will experience slower growth than that of inbound.

Modeling and Design of Common Mode and Differential Mode Filter for PWM Converters

Gopal Mondal,Jonathan Robinson,Michael Finkenzeller 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5

This paper presents a method to model a backto-back converter and the additional passive filter system. The mathematical modeling method followed the step of converting the three-phase system to single phase systems by separating the differential mode (DM) and common mode (CM) noise circuit for the design of the filter components separately. The model accounts for parasitic components in the converters and presents an indirect method of estimating parasitic capacitance for CM filter design. Design rules for the different components are summarized. Results from a lab prototype are presented and show good correspondence to the model.

Activation of Cryptic hop Genes from Streptomyces peucetius ATCC 27952 Involved in Hopanoid Biosynthesis(s)

( Gopal Prasad Ghimire ),( Niranjan Koirala ),( Jae Kyung Sohng ) 한국미생물 · 생명공학회 2015 Journal of microbiology and biotechnology Vol.25 No.5

Genes encoding enzymes with sequence similarity to hopanoids biosynthetic enzymes of other organisms were cloned from the hopanoid (hop) gene cluster of Streptomyces peucetius ATCC 27952 and transformed into Streptomyces venezuelae YJ028. The cloned fragments contained four genes, all transcribed in one direction. These genes encode polypeptides that resemble polyprenyl diphosphate synthase (hopD), squalene-phytoene synthases (hopAB), and squalenehopene cyclase (hopE). These enzymes are sufficient for the formation of the pentacyclic triterpenoid lipid, hopene. The formation of hopene was verified by gas chromatography/ mass spectrometry.

TIFY family genes in Chinese cabbage (Brassica rapa ssp. pekinensis): A Genome-wide analysis reveals their stress and hormone responsive patterns

Gopal Saha,Jong-In Park,Nasar Uddin Ahmed,Md. Abdul Kayum,Ill-Sup Nou 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07

The TIFY family is composed of a plant-specific group of genes with diversity of functions. This family represents four subfamily of proteins viz. ZML, TIFY, PPD and JASMONATE ZIM-domain (JAZ) proteins. TIFY proteins especially, JAZ proteins have been reported to perform different biological processes, such as developmental and stresses and hormone responses in Arabidopsis and rice. However, there is no information about this family genes in Brassicaceae. This study identifies 36 TIFY genes in Brassica rapa, an economically important crop species from this family. An extensive in silico analysis through phylogenetic grouping, protein motif organization and intron-exon distribution also confirmed 4 subfamilies of BrTIFY proteins. Out of 35 BrTIFY genes, we identified 21 under JAZ subfamily besides 7 TIFY, 6 ZML and 2 PPD. An extensive expression profiling of 21 BrTIFY JAZs both in tissues and organs of B. rapa revealed differential expression patterns. Almost all the BrTIFY JAZs predominantly expressed in leaves and flower buds. Besides, in a flower stage specific expression analysis we observed 14 BrTIFY JAZs with constitutive expression patterns. This indicates BrTIFY proteins have a strong involvement in the development of B. rapa flowers. Our protein interaction study also reveals the strong association of these proteins with the fertility and defense processes of B. rapa. To elucidate the stress responsiveness of BrTIFY genes, we analyzed the low temperature-treated whole-genome microarray data set and found almost all the BrTIFY JAZs were having variable transcript abundance in two contrasting inbred lines of B. rapa. Subsequently, all 21 BrTIFY JAZs were validated in response to cold stress in the same two lines via qPCR, where 9 genes were found to show up- regulation. And, a high and differential qPCR expression pattern of all the BrTIFY JAZs was also recorded against JA. Additionally, BrTIFY JAZs were tested against salt, drought, Fusarium, ABA and SA treatments and a considerable number of genes were found to be induced. The extensive annotation and transcriptome profiling reported in this study will be useful for understanding the involvement of TIFY genes in stress resistance and different developmental functions, which ultimately provides the basis for functional characterization and exploitation of the candidate genes for genetic engineering of B. rapa.

Electrospun ZnO hybrid nanofibers for photodegradation of wastewater containing organic dyes: A review

Gopal Panthi,박수진,박미라,김학용,이슬이 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1

Heterogeneous photocatalysis involving zinc oxide (ZnO) nanofibers (NFs) has emerged as a newpromising route for the cost-effective treatment of organic pollutants and the transformation ofhazardous substances into benign forms. In general, it involves the development of smart approaches toreduce the harmful effects of highly toxic pollutants, which are difficult to treat. This review presentsresearch that has been focused on the fabrication of electrospun ZnO hybrid NFs and their applications inthe photodegradation of different organic pollutants that are discharged into wastewater from textileand other industrial processes. Furthermore, a short discussion on charge transfer mechanisms duringphotocatalytic reactions is also presented.

Trap Culture Technique for Propagation of Arbuscular Mycorrhizal Fungi using Different Host Plants

Gopal Selvakumar,Kiyoon Kim,Denver Walitang,Mak Chanratana,Yeongyeong Kang,Bongnam Chung,Tongmin Sa 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.5

Arbuscular mycorrhizal fungi (AMF) spore propagation and long term maintenance is still a complicated technique for farmers. The use of AMF for their ability to promote plant growth and protect plants against pathogen attack and environmental stresses demands AMF propagation for large scale application. This study aimed to propagate AMF spores by trap culture technique and assess their ability to propagate with different host plants in a continuous plant cycle. Mycorrhizal inoculation by trap culture in maize resulted in longer shoots and roots than sudangrass plants. Increase in dry weight with higher percentage also was observed for maize plants. After first and second plant cycle, maize plants had the higher percentage of mycorrhizal response in terms of colonization and arbuscules than sudangrass. Maximum in spore count also achieved in the pots of maize plants. The results show that maize plant is more suitable host plant for AMF spore propagation and trap culture technique can be used effectively to maintain the AMF culture for long time.

Hairy vetch, compost and chemical fertilizer management effects on red pepper yield, quality, and soil microbial population

Gopal Selvakumar,이평호,이성은,한승갑,정봉남 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.5

Organic fertilizers may contribute substantially to improving yield, soil quality, and reducing the environmental impacts of conventional farming. This study investigates the effects of organic fertilizers, like green manure composed of hairy vetch (HV), livestock compost (LC), or a combination of the two (LC + HV), has on red pepper growth, yield, fruit quality, and soil microbial populations as compared to more commonly used chemical fertilizers. This study investigates the effects of different fertilizer treatments on red pepper growth, yield, quality, and soil microbial populations. The experimental plot treatments were no fertilizer (CON), chemical fertilizer, HV, LC and LC + HV. In these treatments, 70-day-old red pepper plants were grown for an additional 140 days under treatment conditions. Plant dry weight, macro- and micro-nutrient contents were analyzed. Post-harvest soil properties and cultivable soil microbial population were determined. HV and LC + HV treatments had significantly high leaf and stem dry weight. All the treatments increased T–N, P and Mg contents in plants and the highest uptake was recorded for plants fertilized with HV. After harvest, soil fertilized with LC + HV had higher soil organic matter and available P, K and Ca as compared to chemical fertilizers. In addition, soil fertilized with organic fertilizers had significantly more cultivable microbial populations than chemical fertilizers. Overall, these results suggest that organic fertilizers could be used to reduce the application of synthetic fertilizers and aiding sustainable agriculture.

Analysis of heterosis and recombination loss for fitness and productivity traits in different hybrids of mulberry silk moth Bombyx mori

Gopal SUBRAMANYA,Stephen C. BISHOP 한국곤충학회 2011 Entomological Research Vol.41 No.1

Three different races of lepidopteron silk moth Bombyx mori were used in reciprocal and inter se crosses to determine heterosis effects at F₁and recombination loss at the F₂generation for three fitness traits (fecundity, larval duration, survival rate) and four productivity traits (larval weight, cocoon weight, shell weight, filament length). Eleven mating types were represented in the present study, including three pure breeds and a variety of F₁and F₂populations arising from regular and reciprocal crosses, respectively. Equations were derived to evaluate heterosis, maternal and overdominance effects for the above traits. Estimates of heterosis and overdominance effects revealed significant heterosis effects for all the traits, but overdominance was only seen for larval duration (favorable effect) and survival rate (unfavorable effect). Maternal effects were significant for the majority of the traits under study. The results revealed significant reduction for all the quantitative traits from F₁to F₂, except for larval duration. The most obvious explanation for the reduction of fitness parameters and productive traits is the reduction in heterozygosity from F₁to F₂(it is expected that one half of the heterozygosity of F₁is lost in F₂). For larval duration this explanation seems insufficient and breakdown of epistatic gene effects (i.e. recombination loss) has been suggested.

MYB Transcription Factor Family: Characterization and Expression Profiling against Stresses in Brassica rapa

Gopal Saha,Jong-In Park,Hee-Jeong Jung,Nasar Uddin Ahmed,Md. Abdul Kayum,Ill-Sup Nou 한국원예학회 2014 한국원예학회 학술발표요지 Vol.2014 No.10