منابع مشابه
Breastfeeding and IQ: evaluation of the socio-environmental confounders.
Numerous papers (1–6), including a recent metaanalysis (7), have contributed to the growing literature investigating whether breastfeeding can enhance child cognitive development, as assessed by IQ. Virtually all the ndings to date concur in showing an association between better performance on IQ tests in children who were breastfed over those who were bottlefed. This intellectual advantage h...
متن کاملinterrelations between plants and environmental variables
distribution and abundance of plants has been correlated with a variety of complex environmental gradients. environmental factors affect plants growth and need to be understood by ecosystem managers. this study was carried out to examine the relationships between site factors and different vascular and non-vascular plants in north of iran. for this purpose, vegetation and soil sampling was perf...
متن کاملInterrelations Between Plants and Environmental Variables
Distribution and abundance of plants has been correlated with a variety of complex environmental gradients. Environmental factors affect plants growth and need to be understood by ecosystem managers. This study was carried out to examine the relationships between site factors and different vascular and non-vascular plants in north of Iran. For this purpose, vegetation and soil sampling was perf...
متن کاملEnvironmental Variables and Real Estate Prices
The aim of this paper is to compare various real estate valuation models and the manner in which they take into account environmental variables. The reference model is taken to be a standard linear regression model including ordinal variables to measure environmental quality. This type of model is widely used. It is first compared to linear models which incorporate environmental quality notes e...
متن کاملEvolution and the Regulation of Environmental Variables
The idea that the biota can regulate the abiotic components of their environment to levels suitable for life has attracted criticism from neo-Darwinian theorists but is still a viable hypothesis. Here we present a model, similar to Daisyworld [1] but more general, which allows for a more extensive study of the compatibility of biotic regulation with evolutionary theory. Results obtained highlig...
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ژورنال
عنوان ژورنال: Nature
سال: 1978
ISSN: 0028-0836,1476-4687
DOI: 10.1038/272666b0