| 11. | The Nickel ( 1995 ) exclusion of biogenic substances was not universally adhered to.
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| 12. | Most natural gas was created over time by two mechanisms : biogenic and thermogenic.
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| 13. | About 30 % of people are sensitive to biogenic amines, such as histamines.
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| 14. | It forms biogenic habitat by creating large aggregations of hundreds to thousands of individuals.
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| 15. | Other biogenic amines may also have an effect.
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| 16. | Biogenic deposition from suspension may also supply sediment to these deepwater bottom-currents.
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| 17. | Coal derived methane appears to be mostly thermogenic in origin with some biogenic production.
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| 18. | Diatoms, radiolaria and siliceous sponges use biogenic silica as a structural material for skeletons.
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| 19. | As an alternative, several researchers have investigated the precipitation of metals using biogenic sulfide.
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| 20. | Various kinds of rock coatings have developed on these lavas, some of biogenic origin.
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