Notably, there is a gap on the time-trends of these substances in the Chinese population [37]. Our objective was to analyse time-trends in the urinary concentrations of phthalates, DINCH, and DEHT in the general population from non-European countries (including China), in the last decade. ...
Until this time, the world's population was kept in check by high death rates, which were due to the combined effects of plagues, famines, unsanitary living conditions, and general poverty. After 1750, the world's population grew substantially; by 1950 it had tripled to around 2.5 billion....
A decentralization of the first-best solution in Section 3.4 highlights tendencies concerning an over-aged population and optimal policy instruments. Section 4 presents the data set (4.1) and the calibration of the LF model (4.2). Then, I emphasize deviations in observed and optimal age ...
A significant obstacle is the availability of spatially explicit population data over long time periods. Spatially explicit population maps, including the Gridded Population of the World (GPW)19, the Global Rural Urban Mapping Project (GRUMP)20, LandScan21, and WorldPOP22, are of limited utility ...
This study analyzes the human population growth rate and corresponding meat supply trend between 1991 and 2000 in Lagos State. Secondary data covering time and series were obtained from several Public Institutions. Human population data for Lagos State over the period showed an increase of 28.5% ...
Few natural populations grow at exponential rates for extended periods of time because resources typically become limiting when population abundance is very high. The abundance of environmental resources determines the rate of population growth over time. ...
1【题目】535353.T he human population of Sri Lanka is now believed to be over 20 million. As a result, large areas of trees are being turned into farmland, highways are being built over centuries-oldelephant migration routes, and elephants are being driven out of their habitats. T his ch...
beneath. Since the 1960s, world population has more than doubled, but the growth rate has been falling the entire time. We're witnessing the most fundamental shift to take place in modern human history. The shift towards pervasive and permanent low fertility, population aging and eventual ...
Haematopoietic stem cells drive blood production, but their population size and lifetime dynamics have not been quantified directly in humans. Here we identified 129,582 spontaneous, genome-wide somatic mutations in 140 single-cell-derived haematopoietic stem and progenitor colonies from a healthy 59-...
Archaeogenomic studies have largely elucidated human population history in West Eurasia during the Stone Age. However, despite being a broad geographical region of significant cultural and linguistic diversity, little is known about the population histor