Studies the relation between growth rates and obsolescence rates and half-life of theoretical population genetics literature.
Explores the application of lognormal distribution in age distribution of citations over a period of time.
The content of the following trace elements, Ag, Co, Cr, Cs, Fe, Hg, Rb, Sb, Se and Zn has been evaluated in the diets, excretion
(urines and feces), blood and hair samples taken from different groups of subjects. Each population group is composed by five
or more individuals selected in order to be representative of the adult population living in a well defined community. Some
communities, with different socio-economical living habits, and displaced in different regions of Italy, have been considered
in order to detect the variability, if any, of the trace element distribution among the Italian population. The data obtained
seem to show a reasonable uniformity of the average trace element daily intakes in different regions of Italy. Beside the
individual variability, very significant differences among the groups studied have not been found, as the trace element contents
in excreta, blood and hair samples are concerned. All data are compared with similar data referred to population living in
Authors:L. Hufnagel, MÁRTA Gaál, BRIGITTA Őszi, and Z. Mészáros
The knowledge of the population dynamical characteristics of the pests fundamentally determines the success of the plant protection prognosis. In this paper we examine the possibilities of the utilization of the information about the population dynamical stability that we get from field examination data. We take into account neighbouring data pairs from data series regarding the change of insect density counted at stated intervals. Using these pairs of values – from the tendency of the absolute and relative changes – we can draw conclusion on the stability of the individual density values or on the stability of the whole dynamical pattern.
Authors:A. Khan, M. Khaliquzzaman, M. Zaman, M. Husain, M. Abdullah, and S. Akhter
The trace element composition of whole blood has been investigated in adult population in Bangladesh. The population was formed
of one hundred individuals randomly selected from a working community of five hundred adults. The blood samples were freeze
dried and analyzed using the external beam PIXE method. In this analysis, proton beams of 2 MeV energy and about 30 nA current
were used for characteristic X-ray excitation. The concentration of eight elements, K, Ca, Fe, Cu, Zn, Br, Rb and Pb were
determined by comparison with a calibration obtained from NBS orchard leaves. The frequency distributions of all the elements
measured are presented and the results are compared with available data.
Authors:H. Dang, V. Pullat, D. Jaiswal, M. Parameswaran, and C. Sunta
The daily intake of uranium (238U) by an urban Indian adult population was estimated by the analysis of a duplicate diet, drinking water, and air samples using neutron activation and radio-chemical separation. The uranium intake through food is 0.55 g which is much larger than that from drinking water and air, at 0.09 and 0.01 g, respectively. The total daily dietary intake of uranium, calculated from the concentrations measured in the individual food ingredients and their daily consumption (based on the national survey), is found to be 2.2 g which is a factor of 3.5 higher than that based on a duplicate urban diet. The maximum contribution to the daily intake is found to be from cereals. The lower intake by the urban population is most likely due to their lower food consumption.
Focuses on the validity of Lotka's law and the negative binomial distribution model to author productivity data in different time periods in theoretical population genetics speciality. Finds out if there is any relation between applicability of a statistical distribution and the development of speciality. Looks at the linkages between inequality/concentration measures and the development of speciality. Explores the relevance and applicability of the two generalisations, namely Price Square, Root Law and 80/20 Rule to the author productivity data and their relation with development of theoretical population genetics. Finally, a study of the growth of practitioners in the field with different productivity levels is conducted, and the emergence of core authors in the speciality is explored.
Haussmann, B.I.G., Obilana, A.B., Ayiecho, P.O., Blum, A., Schipprack, W., Geiger, H.H. 2000. Yield and yield stability of four population types of grain sorghum in a semi-arid area of Kenya. Crop Sci. 40 :319
Authors:Ilona Pfeiffer, Zoltán Farkas, Judit Kucsera, Muthusamy Chandrasekaran, Shine Kadaikunnan, Naiyf S. Alharbi, and Csaba Vágvölgyi
The genetic background of mitochondrial DNA polymorphism in Candida albicans was studied by physical and functional mapping of four haplotypes identified recently in a hospital-population. The restriction patterns revealed considerable differences; however, the size of the mitochondrial DNA did not vary significantly. Sequence data demonstrated that size differences arose by short deletions, while restriction fragment length polymorphisms are caused by nucleotide substitutions in single sites. Gene rearrangement could not be detected; nevertheless, the coincidence of nucleotide substitution pattern in the inverted repeat region suggested the occurrence of homologue recombination.