منابع مشابه
Grading Lead in Schools
In this month's issue, investigators Charles V. Shorten and Marijane K. Hooven of West Chester University in Pennsylvania report on a method that may give a more realistic measure of the exposure of preschool children to lead-contaminated dust [EHP 108:663-666]. Shorten and Hooven set out to assess the relationship between 168 preschool children attending Philadelphia Head Start programs and va...
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The circulatory system of mammals consists of 2 components, blood vessels and lymphatic vessels, which are counterparts that act in parallel but develop in series. Unlike blood vessels that are a system built up to form a closed circuit carrying circulating blood, lymphatic vessels differ in that it is an open system with unique architecture starting at its periphery as a blunt end specialized ...
متن کاملGermany and China take the lead.
he foundation of the 2015 Paris climate agreement was to a large extent based on cooperation between the United States and China on clean energy and emissions reductions. With the United States now planning to withdraw from the agreement, who will replace them? Ahead of the United Nations climate conference in Bonn that begins next week, the spotlight is on Germany to fill the vacancy. Indeed, ...
متن کاملHow successful plants take the lead
Germinating quickly, growing fast, withstanding competitors and defending against herbivores already since decades, ecologists have suggested that these are important characteristics of successful plants. However, it has also been suggested that species characteristics are less important as determinants of plant establishment success than other factors such as seed availability or environmental...
متن کاملMaldives take a climate lead
research at Southampton University. At the higher end of this range, the rising water may displace up to 187 million people. Looking more closely at population displacements not just from coastal areas, but also from sub-Saharan Africa, François Gemenne from the University of Liège, Belgium, fears that “a greater temperature change would not only affect the magnitude of the associated populatio...
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ژورنال
عنوان ژورنال: BMJ
سال: 2007
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.39283.399907.1f