Singlet axial-vector coupling constant of the nucleon in QCD without instantons

We have analyzed axial-vector current-current correlation functions between one-nucleon states to calculate the singlet axial-vector coupling constant of the nucleon. The octet-octet and the octet-singlet current correlators, investigated in this work, do not require any use of instanton effects. The QCD and hadronic parameters used for the evaluation of correlators have been varied by (10 - 20)%. The value of the singlet axial-vector coupling constant of the nucleon obtained from this analysis is consistent with its current determination from experiments and QCD theory.Comment: A slightly modified version to be published in Physics Letters B; 14 pages with 6 figures and 1 tabl

Eta-nucleon and eta-prime-nucleon coupling constants in QCD and the role of gluons

Coupling constants of $\eta$ and $\eta^{\prime}$ mesons with nucleons have been calculated using the method of QCD sum rules. Starting from vacuum-to-meson correlation function of interpolating fields of two nucleons, its matrix element with respect to nucleon spinors has been considered. Coupling constants at the physical points have been estimated from extrapolation of results obtained at two other points. Anomalous glue has been found to give substantial contribution to the coupling constants and also accounts for a significant OZI-rule violation.Comment: 6 pages, 3 figures and 2 table

Nutritional potential of malted nutri flour against conventional flours used in Indian food products

The purpose of this study was to introduce nutri flour in the development of value-added food products. Nutri flour was developed using malted wheat, malted barnyard millet and malted pearl millet. The proximate composition, iron, some anti-nutritional factors (oxalates, phytates) and antioxidant activity were determined for developed nutri flour and conventional flours like whole wheat flour, refined wheat flour and Bengal gram flour. The results indicated that the developed nutri flour had the highest protein (18.68 g/100g) as well iron content (9.22 mg/100g) which was significantly higher than other conventional flours. The nutritional quality of the obtained nutri flour suggests that the flour can be considered as an alternative to conventional existing flours in process of food product development ensuring better nutritional quality of developed products

Some Aspects of Tubes Galvanising and Practice at 'Tubes Division' of 'Tata Steel'

Hot dip galvanising as it process by which iron & steel can he treated to prevent corrosion. Like other products, hot dip galvanising is most widely used for producing zinc coatings on tubes as this method ensures rapid application of zinc coatings on highly efficient production lines abroad and semi automatic line in India. In India the sec-tor of galvanising tubes is important from the point of view of the tonnage of tubes galvanised and zinc consumed. Although the basic principles of galvanising have remain unchanged for long years, yet continuous research on various aspects of galvanising has enabled this industry to be technically controlled

Effect of Steel Composition on Zinc Coating and Pot Failure

The main topics of this paper are the study of major factors affecting the growth of the zinc coating on steel tubes in a scnti-automatic galvanising plant. By knowing & controlling these factors it is possi- ble to maintain the zinc coating well under control as far as possible. Before discussing he factors affecting zinc coating in details I would like to discuss the structure of zinc coating in short

A comparative analysis of rural-urban migration in three states of India : Bihar, West Bengal and Kerala

This work is a comparative analysis of patterns of selectivity in rural to urban migration within three Indian states- Bihar, West Bengal and Kerala. The rationale for concentrating on these three provinces is to show how regional-level diversities in socio-cultural patterns and economic development, as well as in demographic conditions, account for the differing patterns of migration selectivity. The analysis is confined to five variables: age, sex, marital status, occupation and education. The censuses of India, 1961 and 1971 are the chief sources of data. Important findings emerging from this study are: Rural-urban migration is highly selective of young adults, but female migrants in these states are younger than male migrants. Female migrants are still younger in Bihar and West Bengal than in Kerala because of the difference in age at marriage, whilst there is no difference in the age at migration of males in these states. Rural to urban migration is highly selective of males, and the incidence of male selectivity is greater in Bihar than in West Bengal and in West Bengal than in Kerala. Sex is found to be associated with distance in migration; at shorter distances, females predominate and at longer distances, males predominate. With regard to marital status of migrants, there are some marked variations between the sexes and states. For instance, in all states single males are more migratory than either married males or single females. However, both never married and ever married males are more migratory in Kerala than in Bihar and West Bengal. Single females are more migratory in Kerala than in Bihar and West Bengal. Migrants tend to show a higher rate of workforce participation than non-migrants at destination. The economic motive for female migration is quite weak in these states, but it is still weaker in Bihar and West Bengal relative to Kerala. Education plays a very decisive role in rural to urban migration. Educated persons are more likely to migrate than illiterate and merely literate persons. Educated female migrants are more likely to be non-workers in Bihar and West Bengal and workers in Kerala. Although contrasts in economic conditions are much greater between West Bengal on the one hand and Bihar and Kerala on the other, differences in the patterns of migration selectivity are much sharper between Bihar and West Bengal on the one hand and Kerala on the other. Social and cultural variations, particularly with regard to the age at marriage, marriage practices, level of literacy, status of women, practice of familial migration and female workforce participation, between North and South India seem to explain the differing patterns of migratory behaviour much more than economic variables. As regional variations exercise a profound impact on the migratory behaviour of a population, it is hard to evolve universally applicable differentials of migration. It is for this reason that little progress has been made towards building a general theory of differentials in migration

Axial and pseudoscalar current correlators and their couplings to eta and etaprime mesons

Correlators of singlet and octet axial currents, as well as anomaly and pseudoscalar densities have been studied using QCD sum rules. Several of these sum rules are used to determine the couplings f^8_eta, f^0_eta, f^8_etaprime and f^0_etaprime. We find mutually consistent values which are also in agreement with phenomenological values obtained from data on various decay and production rates. While most of the sum rules studied by us are independent of the contributions of direct instantons and screening correction, the singlet-singlet current correlator and the anomaly-anomaly correlator improve by their inclusion.Comment: 31 pages, 11 figure