MONOPOLY UNIONS AND CORPORATISM : IMPLICATIONS FOR STRATEGIC TRADE POLICY

Bandyopadhyay, S.,Bandyopadhyay, S. C. 한국국제경제학회 1998 International Economic Journal Vol.12 No.4

Requirement of Protein Kinase C Pathway during progesterone-induced Oocyte Maturation in Amphibian, Rana dybowskii

Bandyopadhyay, Jaya,Bandyopadhyay, Arun,Kang, Hae-Mook,Kwon, Hyuk-Bang,Choi, Hueng-Sik The Korean Society for Integrative Biology 1998 Korean journal of biological sciences Vol.2 No.1

The present study investigated the involvement of the phospholipase C (PLC) and protein kinase C (PKC) signaling pathways during progesteroneinduced meiotic maturation in amphibian (Rana dybowskii) oocytes. Prosesterone-induced germinal vesicle breakdown (GVBD) of oocytes was significantly inhibited by a PKC inhibitor, staurosporine and a PLC inhibitor, U73122, in a dose-dependent manner. In contrast, U73343, an inactive analogue of U73122, was ineffective in suppressing GVBD. PKC activity in oocytes reached a maximum level at 30 min after progesterone stimulation and this elevated PKC activity was effectively suppressed by U73122 or staurosporine, suggesting that the activation of PKC enzyme is closely linked to PLC signaling during oocyte maturation. In addition, these inhib itors blocked the maturation promoting factor (MPF) activity which appeared in oocytes in response to progesterone, suggesting that PKC activation is an important signal for MPF activity. Therefore, this study demonstrates that the activation of PKC via PLC signaling is directly linked to an intracellular protein kinase cascade related to the appearance of MPF activity during meiotic maturation in amphibian (Rana dybowskii) oocytes.

Labor Unions and International Market Share Rivalry : Does Corporatism Matter?

Bandyopadhyay, Subhayu,Bandyopadhyay, Sudeshna Champati 세종대학교 국제경제연구소 1996 Journal of Economic Integration Vol.11 No.2

This paper studies the effects of corporatism on national welfare and optimal trade policy under monopoly unionism and efficient contracting. The results are remarkably different for the two models considered. Under free trade, corporatism is welfare augmenting in the monopoly union case while it has no effect on welfare in the efficient contract case. The optimal subsidy is increasing in the degree of corporatism under efficient contracting and independent of the degree of corporatism in the monopoly union case.(JEL: F13, J50)

Labor Unions and Inkrnationa1 Market Share Rivalry: Does Corporatism Matter?

( Subhayu Bandyopadhyay ),( Sudeshna Champati Bandyopadhyay ) 세종대학교 경제통합연구소 1996 Journal of Economic Integration Vol.11 No.2

This paper studies the effects of corporatism on national welfare and optimal trade policy under monopoly unionism and efficient contracting. The results are remarkably different for the two models considered. Under free trade, corporatism is welfare augmenting in the monopoly union case while it has no effect on welfare in the efficient contract case. The optimal subsidy is increasing in the degree of corporatism under efficient contracting and independent of the degree of corporatism in the monopoly union case. (JEL: F13, J50)

Regulation of Calcineurin, a Calcium/Calmodulin-dependent Protein Phosphatase, in C. elegans

Jaya Bandyopadhyay,Arun Bandyopadhyay,Jungsoo Lee 한국분자세포생물학회 2004 Molecules and cells Vol.18 No.1

Calcineurin is a calcium/calmodulin-dependent serine/ threonine protein phosphatase. It is a heterodimeric protein consisting of a catalytic subunit calcineurin A, and a regulatory calcium-binding subunit, calcineurin B. The primary sequence of both subunits and heterodimeric structure is highly conserved from yeast to mammals. Calcineurin has long been implicated in various signaling pathways. Calcineurin genes (cna- 1/tax-6 and cnb-1) have been identified in the nematode Caenorhabditis elegans, which share high homology with their Drosophila and mammalian counterparts. C. elegans calcineurin binds calcium and functions as a heterodimeric protein phosphatase establishing its biochemical conservation. Calcineurin expresses in diverse tissues implicating its important role in various physiological processes. This review will focus in brief on the expression pattern and regulation of calcineurin including its effect on growth and development, locomotion, egg-laying, and sensory responses.

Nonparametric homogeneity test based on ridit reliability functional

Uttam Bandyopadhyay,Debajit Chatterjee 한국통계학회 2015 Journal of the Korean Statistical Society Vol.44 No.4

The paper provides nonparametric test procedures for comparing K (>2) unknown univariate populations, in which the tests are formulated by using consistent estimators of the ridit reliability functionals (see, for example, Bandyopadhyay and De, 2011) for comparing more than two populations. The tests are asymptotically distribution free and can be used for data on both discrete and continuous random variables. An extensive numerical study is performed to compare the proposed test with the nonparametric tests, obtained from Konietschke et al. (2012), in terms of type I error rate and power. A data study illustrates the use of such tests.

Studies on the Seasonal Incidence of the Whitefly (Dialeuropora decempuncta Quaintance and Baker) Causing Leaf Curl on Mulberry in Relation to Abiotic Factors

Bandyopadhyay, U.K.,Sahu, P.K.,Raina, S.K.,Santhakumar, M.V.,Chakraborty, N.,Sen, S.K. Korean Society of Sericultural Science 2000 International Journal of Industrial Entomology Vol.1 No.1

A study was conducted to examine the relationship between abiotic factors and the population of white-fly (Dialeuropora decempuncta) in mulberry field. The study reveals that relationship between abiotic factors and the whitefly population is very much existent like other pests in other agricultural crops. Duration and time of distinct occurrence of whitefly in mulberry is influenced by the abiotic conditions of field. Abiotic parameters of previous month are more important in influencing the intensity of the pest than the current abiotic factors. Not all the abiotic factors are equally important but factors like minimum temperature, fluctuation in temperature during the days minimum relative humidity, fluctuation in relative humidity and rainfall are the major important lactors in influencing the intensity of the pest under consideration.

Structure, Modified Scaled Quantum Mechanical Force Field and A Priori Prediction of Vibrational Spectra and Their Assignment and Exponential Scaling of Frequencies of Triphenylene

Bandyopadhyay, Indrajit Korean Chemical Society 2003 Bulletin of the Korean Chemical Society Vol.24 No.6

The structure, force field and vibrational spectra of triphenylene are studied by $B3LYP/6-31G^*$(5d) level of theory. The results are compared to those of the related system, phenanthrene. The scale factors in nonredundant local coordinates obtained after fitting the DFT frequencies to the experimental numbers of phenanthrene-$d_0 and -d_{10}$ are transferred to predict the spectra and assignment of triphenylene for in-plane modes. The frequencies based on scaling methodology due to Lee et al. are also obtained. These frequencies are compared with the predicted numbers based on scale factors from phenanthrene. Probable assignment for out-of-plane modes is proposed based on simple scaling of Scott and Radom (scale factor 0.9614) as well as by scaling methodology by Lee et al.

Determination of Economic Threshold Level of Whitefly, Dialeuropora decempuncta (Quaintance and Baker) in Mulberry, Morus alba L.

Bandyopadhyay, U.K.,Santhakumar, M.V.,Saratchandra, B.,Das, K.K. Korean Society of Sericultural Science 2002 International Journal of Industrial Entomology Vol.4 No.2

Whitefly, Dialeuropora decempuncta (Quaintance rind Baker) (Homoptera: Aleyrodidae) has attained the major pest status in mulberry, causing 24% crop loss by sucking the leaf juice and manifesting leaf curl, chlorosis and sooty mould desease during monsoon season in West Bengal, India. The assessment of economic threshold revel is an essential component for formulating the management practices. Experiments were carried out by inoculating five different densities of whitefly viz.,10, 20, 30, 40 and 50 adults on covered mulberry plants in glass houses. From the findings, it was observed that irrespective of released density, no crop loss was observed in the initial period. But with the passing of days, the percent crop loss was increased rapidly. The linear relationship between percent crop loss and number of adults released was established to highlight the significance of economic threshold. The statistical analysis in the linear form of equation showed that initial population of 10, 20, 30, 40 and 50 whiteflies/plant causes 3%, 12%, 21%, 30% and 40% crop loss in a period of 28 days which is equivalent to 57 kg, 247 kg, 437 kg, 626 kg and 816 kg leaf/acre. Execution of management practices (spray of 0.01% monocrotophos) are economical to the farmer whenever the loss is above 247 kg/acre, but below which application of control measures is not economical. From this study, it can be inferred that the economic threshold level far whitefly is 20 individuals/plant beyond which a farmer has to take appropriate control measures.

Displaced Higgs production in type III seesaw

Bandyopadhyay, Priyotosh,Chun, Eung Jin Springer-Verlag 2010 Journal of high energy physics Vol.2010 No.11