Words similar to aggregations
Example sentences for: aggregations
How can you use “aggregations” in a sentence? Here are some example sentences to help you improve your vocabulary:
Prehn and West, using 1990 census data, calculated breast cancer incidence rates for aggregations of census block groups matched to Marin County on characteristics associated with higher breast cancer risk (percentage white population, urban status, average parity, median household income, percentage of persons with a college degree, percentage of persons with a working-class occupation, and percentage of households living below the poverty line), and found rates in the matched areas to be comparable with those in Marin County [ 4 ] . In another study using interview-based information, higher breast cancer incidence rates among white women in the SFBA were also fully explained by the distribution of parity, age at first birth, months of breast-feeding, age at menarche, and age at menopause [ 5 ] . Other previous analyses of nationwide variation in breast cancer incidence and mortality found most of it attributable to the distribution of known breast cancer risk factors [ 15 16 ] . It thus seems likely that a substantial part of the excess incidence observed in Marin County is explained by a higher concentration of women with a higher breast cancer risk profile.
But it is also not possible to recover whole aggregations of worms and to keep them alive in the lab for biochemical and biogeochemical measurements—this would require simulation of seepage under pressure.
Obviously such hypotheses are very difficult to test—today it is still hardly possible to measure gas, petroleum, and sulfide fluxes in the seafloor in situ at depth, especially below tubeworm aggregations.
Individual aggregations at seeps can consist of hundreds to thousands of worms, requiring sulfide fluxes of half a mole per day—and this for more than 200 y [12].
So where does the supply of sulfide come from at seeps that enables such large aggregations to be maintained for so long?
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