The prevalence of hepatitis A virus antibodies was tested by radioimmunoassay in Norway in healthy blood donors, in patients without clinical signs of liver diseases and in two selected groups of patients. The presence of hepatitis A antibodies was highly age-dependent in 625 normal persons. A major reduction occurred from 50 per cent or more in those born before 1938 to 10 per cent or less amo...

In this paper, we analyze the long-time behavior of the survival probability P(A)(t) of an A particle, that performs lattice random walk in the presence of randomly moving traps B. We show that for both perfect and imperfect trapping reactions, for arbitrary spatial dimension d and for a rather general class of random walks, P(A)(t) is less than or equal to the survival probability of an immobi...

In this study, we develop an updated global estimate of onshore wind energy potential using reanalysis wind speed data, along with updated wind turbine technology performance, land suitability factors, cost assumptions, and explicit consideration of transmission distance in the calculation of transmission costs. We find that wind has the potential to supply a significant portion of the world en...

This article provides an overview of China’ plant biotechnology development and its impacts on farmers. Our study shows that while Chinese policymakers have considered agricultural biotechnology as a strategically significant tool for improving national food security and raising agricultural productivity, they have been hesitant to approve the commercialisation of new genetically modified (GM) ...

Holsteinized Russian Black Pied cattle of the Ural type are bred in Sverdlovsk region, which is represented by large, highly productive animals with a high genetic potential for productivity. The purpose work was to study effect first heifers’ live weight on their productivity and interrelation between milk yield quality indicators. It found that there positive tendency an increase cows’ from l...

in order to investigation of planting pattern and plant density effects on vegetative and reproductive organs and yield of early maturing cotton cultivars, an experiment was carried out as split–split plot using randomized complete block design with 4 replications, in karkandeh research station, during 2004-2205. three row spaces (60, 70 and 80 cm) were consisted as main factors, plant space in...

Based on phylogenetic and morphological evidence, Tridimeris chiapensis Escobar-Castellanos & Ortiz-Rodr., sp. n. (Annonaceae), a new species from the karst forest of southern Mexico, is described and illustrated. The new species differs from Tridimeris hahniana, the only described species in the genus, in that the latter has flowers with sepals densely tomentose outside, one (rarely two) carpe...

The effects of factorial combinations of post-thinning density (6, 11, and 16 stems per hectare [sph]) and repeated fertilization on the growth and development of young lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) were investigated in central British Columbia. After 14 years, the effects of density and multi-nutrient fertilization (applied at , 5, and 1 years) on tree h...