Browsing by Author "B.B. Singh"

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Effect of gamma-irradiation on chlorophyll content of maize leaves
(1971) B.B. Singh
The present investigation was undertaken to determine the possible effects of gamma-ray irradiation on chlorophyll content of maize leaves. A significant increase in the chlorophyll contents was obtained following gamma radiation exposures of 10-40 kR. © 1971.
Effect of standing water level on lodging behaaviour of rice plants Oriza Sativa L.var.T3
(1966) J.P. Singh; B.B. Singh
[No abstract available]
Effect of vanadium on the growth, yield and chemical composition of maize (Zea Mays L.)
(1971) B.B. Singh
The effects of application of vanadium on the growth, yield, and chemical composition of maize were compared in a series of pot experiments during several years. It was concluded that above a threshold value (0.05 ppm) vanadium was injurious to maize crop, but at milder dose it increased the yield of maize crop significantly. Quality of produce was also affected markedly by vanadium application. © 1971 Martinus Nijhoff.
Erratum: Loss of collectivity in 79Rb (European Physical Journal A (2006) 28 (277-281) DOI:10.1140/epja/i2005-10286-8)
(2006) R.K. Sinha; A. Dhal; P. Agarwal; S. Kumar; Monika; B.B. Singh; R. Kumar; P. Bringel; A. Neusser; R. Kumar; K.S. Golda; R.P. Singh; S. Muralithar; N. Madhavan; J.J. Das; K.S. Thind; A.K. Sinha; I.M. Govil; R.K. Bhowmik; J.B. Gupta; P.K. Joshi; A.K. Jain; S.C. Pancholi; L. Chaturvedi
[No abstract available]
Genetic analysis of yield and yield components in field peas
(1987) B.B. Singh; U.P. Singh; R.M. Singh; B. Rai
The genetic parameters controlling the expression of seed yield and the yield components have been studied using both generation mean and triple test cross (TTC) analyses in two crosses of field pea. From generation mean analysis, it is obvious that in addition to significant estimates of additive and dominance components, epistatic components of mean [(i) and (l) types] were also important and duplicate type of epistasis was predominant for all the traits in both sets of crosses. In the TTC analysis, the major genetic component of variance was the additive component, though the dominance component was also found to be significant. There was evidence of epistasis for most of the characters studied. In fact, the overall epistasis (i type) was the major component of epistasis, but the parameter F was found in the non-significant range. The mean performance of the characters studied was higher in randomly-mated biparental progenies (BIPs) but there were more desirable transgressive segregants in the TTC population. Thus the genetic information obtained from both analyses seems to be complementary rather than alternative modes of inheritance in governing the expression of these useful economic traits. © 1987, Cambridge University Press. All rights reserved.
Loss of collectivity in 79Rb
(Springer New York, 2006) R.K. Sinha; A. Dhal; P. Agarwal; S. Kumar; Monika; B.B. Singh; R. Kumar; P. Bringel; A. Neusser; R. Kumar; K.S. Golda; R.P. Singh; S. Muralithar; N. Madhavan; J.J. Das; K.S. Thind; A.K. Sinha; I.M. Govil; R.K. Bhowmik; J.B. Gupta; P.K. Joshi; A.K. Jain; S.C. Pancholi; L. Chaturvedi
High-spin states in 79Rb were populated in the reaction 63Cu(19F, p2n) 79Rb at E(beam) = 60 MeV. The lifetimes of the excited states of the πg9/2 positive-parity yrast band and of the πp3/2 negative-parity band in 79Rb were measured by the Doppler Shift Attenuation Method. The deduced transition quadrupole moments Qt are found to have a decreasing trend with rotational frequency for both the bands, consistent with those found experimentally in neighbouring nuclei.
Shape changes at high spin in 78Kr
(2006) A. Dhal; R.K. Sinha; P. Agarwal; S. Kumar; Monika; B.B. Singh; R. Kumar; P. Bringel; A. Neusser; R. Kumar; K.S. Golda; R.P. Singh; S. Muralithar; N. Madhavan; J.J. Das; A. Shukla; P.K. Raina; K.S. Thind; A.K. Sinha; I.M. Govil; P.K. Joshi; R.K. Bhowmik; A.K. Jain; S.C. Pancholi; L. Chaturvedi
High-spin states in 78Kr have been studied via the 63Cu (19F, 2p2n)78Kr reaction at a beam energy of 60 MeV using the Indian National Gamma Array (INGA). In this nucleus, lifetimes have been measured upto the I π=22+ level in the yrast positive-parity band and upto the I π=15- level in the negative-parity band using the Doppler Shift Attenuation Method (DSAM). The deduced transition quadrupole moments Qt's are found to decrease with rotational frequency for both the bands.
Some aspects related to the asymptotic solutions of the laminar boundary-layer equations with heat flux
(Kluwer Academic Publishers, 1990) Anil Kumar; B.B. Singh
The oscillatory, conjugate and asymptotic behaviours of the principal and non-principal solutions of the Blasius and corresponding heat transfer equations governing the compressible laminar boundary-layer flow over a semi-infinite flat plate with heat flux have been studied; the results of the discussion being based on the asymptotic integrations of second-order linear differential equations. © 1990 Kluwer Academic Publishers.
Triple Test Cross Analysis in F2 Populations of Four Promising Crosses of Field Pea
(1986) B.B. Singh; U.P. Singh; B. Rai; R.M. Singh
The components of genetic variation were studied in four F2 crosses (PG3× 5064, T163× B.V., T163× Arkel and 5064 × ED) for quantitative characters such as days to flowering, plant height, pod number, seed number, test weight and yield/plant. The overall epistasis (T type) was, in general, a major contributor for genetically controlling the expression of the characters in all the‐ four crosses except for the character seed number in crosses 1 and JV, where the j + l component at epistasis played a significant role in determining the expression of this attribute:. Though the ‘j + l’ component of the epistasis was significant, it was relatively less important than the ‘i’ type epistasis. Both the additive and dominance components of the genetic variation were highly significant for all the trans studied in all die four sets of crosses. The expression of the dominance was directional only for a few characters in certain crosses. The degree of dominance lies in the partial range, and heritability estimates obtained were high for most of the trails. The possible application of cross prediction in the isolation of superior recombinant inbred lines in pea is discussed. Copyright © 1986, Wiley Blackwell. All rights reserved