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Abstract  

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.

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Abstract  

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 other countries.

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populations of Elymus fibrosus (Poaceae). — Genetic Res. and Crop Evol. 47 : 11–24. Bothmer R. Levels and distribution of allozyme and RAPD variation in populations of Elymus fibrosus

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on pheromone-baited and visual traps during population build up. Acta Phytopathologica et Entomologica Hungarica 41 :305–315. Pai B. Comparison of western corn rootworm

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Abstract  

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.

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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.

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Abstract  

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.

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Abstract  

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.

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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

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. Genetics 193 1123 1148 Alföldi, L.: Studies on bacterial conjugational crosses via model populations. I. The

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