منابع مشابه
50 Million Announced Forty Years Ago 100 Million Mexicans… Only
1% in 2000. Although the objective was far from being reached (the current rate being close to 2%), in 2000 Mexico had 53 million inhabitants fewer than it would have had if fertility had remained at its 1970 level. The population pyramids of 1930, 1970 and 2000 clearly illustrate this dynamics (Figure 2). In 1930 the population was beginning to recover from the aftereffects of the Revolution a...
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It is well known that meals containing less meat are more sustainable, but little is known about snack-meals, which typically do not contain meat. This study investigates the diversity in environmental impacts associated with snack production based on 20 common recipes optimized for protein content, energy content and sensory aspects for older adults. The purpose is to improve sustainability of...
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The obligate mutualism between yuccas and yucca moths is a major model system for the study of coevolving species interactions. Exploration of the processes that have generated current diversity and associations within this mutualism requires robust phylogenies and timelines for both moths and yuccas. Here we establish a molecular clock for the moths based on mtDNA and use it to estimate the ti...
متن کاملPercent Seven Million Americans Live In Areas Where Demand For Primary Care
The Affordable Care Act’s expansion of insurance coverage is expected to increase demand for primary care services. We estimate that the national increase in demand for such services will require 7,200 additional primary care providers, or 2.5 percent of the current supply. On average, that increased demand is unlikely to prove disruptive. But when we examined how this increased demand will be ...
متن کاملForty Years of X-Ray Binaries
In 2012 it was forty years ago that the discovery of the first X-ray binary Centaurus X-3 became known. That same year it was discovered that apart from the High-Mass X-ray Binaries (HMXBs) there are also Low-Mass X-ray Binaries (LMXBs), and that Cygnus X-1 is most probably a black hole. By 1975 also the new class of Be/X-ray binaries was discovered. After this it took 28 years before ESAs INTE...
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ژورنال
عنوان ژورنال: To Improve the Academy
سال: 2011
ISSN: 2334-4822
DOI: 10.3998/tia.17063888.0030.017