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تعداد نتایج: 879884 فیلتر نتایج به سال:
Unbalanced distribution of population in a country like Iran as well as accelerating urbanization and environmental degradation, both arising from incorrect location of industrial areas, are two problems that require appropriate industrial development policies to get resolved. Considering the expansion of industrial areas along with their role in contamination of the environment, it is necessar...
Background and Objective: The aim of this study was to evaluate the chemical and microbial quality of bottled water in Iran and to calculate the water quality index (WQI). Materials and Methods: Different brands of bottled water (4 samples from 71 brands) were randomly collected from the market. Chemical and microbial characteristics of the samples were examined and determined. Finally, the ca...
Unbalanced distribution of population in a country like Iran as well as accelerating urbanization and environmental degradation, both arising from incorrect location of industrial areas, are two problems that require appropriate industrial development policies to get resolved. Considering the expansion of industrial areas along with their role in contamination of the environment, it is necessar...
We present a model of interpersonal attitude used for generating expressive postures for computer animated characters. Our model consists of two principle dimensions, affiliation and status. It takes into account the relationships between the attitudes of two characters and allows for a large degree of variation between characters, both in how they react to other characters’ behaviour and in th...
This case study investigated the effect of body position on the first three formants (F1, F2, F3) of the British English vowels /iː/, /ɛ/, /æ/, /ɔː/ and /uː/ produced by one male native speaker. While F1 remained unaffected significant changes in F2 and F3 were found for certain vowels when they were produced in a supine rather than in an upright position. F2 was significantly lower for /iː/, /...
BACKGROUND Chronic obstructive pulmonary disease (COPD) is associated with increased mortality and poor health-related quality of life (HRQoL) compared with the general population. The objective of this study was to identify clinical characteristics which predict mortality and very poor HRQoL among the COPD population and to develop a Bayesian prediction model. METHODS The data consisted of 7...
We calculate evolution and nucleosynthesis in massive Pop III stars with M = 13 ∼ 270M⊙, and compare the results with abundances of very metal-poor halo stars. The observed abundances can be explained by the energetic core-collapse supernovae with M ∼ < 130M⊙ (“hypernovae”) but not by pair-instability supernovae (PISNe) with M ∼ 140 − 270M⊙. This result constrain the IMF for the Pop III and ver...
BACKGROUND Few studies have been done to assess socioeconomic inequities in health in African countries. We sought evidence of inequities in health care by sex and socioeconomic status for young children living in a poor rural area of southern Tanzania. METHODS In a baseline household survey in Tanzania early in the implementation phase of integrated management of childhood illness (IMCI), we...
We present a model to explain the wide range of abundances for heavy r-process elements (mass number A>130) at low [Fe/H]. This model requires rapid star formation and/or an initial population of supermassive stars in the earliest condensed clots of matter in order to provide a prompt or initial Fe inventory. Subsequent Fe and r-process enrichment was provided by two types of supernovae: one pr...
To test the possibility that the Escherichia coli MutY or MutM protein acts as a 2-hydroxyadenine (2-OH-Ade) glycosylase, we treated double-stranded oligodeoxyribonucleotides containing 2-OH-Ade with the E. coli MutY or MutM protein in vitro. We found that a strand with 2-OH-Ade was a very poor substrate of MutY, irrespective of the base in the complementary strand. Moreover, a strand containin...
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