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495061 - The Bacteria Process
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The Bacteria Process
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The Bacteria Process
The Bacteria Process
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495061
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Cook, John E.
Title
The Bacteria Process
The Bacteria Process
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Animation
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Date
12/01/2010
File name
Bacteria_Vertical.jpg
Notes
Caption from Oceanus magazine, Vol. 48, No. 2, pg. 24: 1. Ionized mercury (Hg+2) in seawater and sediments cannot enter bacterial cells. 2. With little or no oxygen available, some bacteria use sulfates (SO4^-2) for respiration. They expel sulfide (S^-2) as a waste product. 3. Sulfide combines with ionized mercury (Hg^+2) in seawater to form mercuric sulfide (HgS). 4. Mercuric sulfide can diffuse into bacterial cells. 5. Inside bacterial cells, chemical reactions remove the sulfide from the mercury and add a methyl group (CH3) to produce monomethylmercury (MMHg). Scientists have not identified the reactions responsible for making MMHg. The MMHg does not appear to benefit or harm the bacteria. 6. Monomethylmercury diffuses out of bacterial cells into seawater, where it is taken up by phytoplankton. This starts the journey of MMHg up the oceanic food chain.
Caption from Oceanus magazine, Vol. 48, No. 2, pg. 24:
1. Ionized mercury (Hg+2) in seawater and sediments cannot enter bacterial cells.
2. With little or no oxygen available, some bacteria use sulfates (SO4^-2) for respiration. They expel sulfide (S^-2) as a waste product.
3. Sulfide combines with ionized mercury (Hg^+2) in seawater to form mercuric sulfide (HgS).
4. Mercuric sulfide can diffuse into bacterial cells.
5. Inside bacterial cells, chemical reactions remove the sulfide from the mercury and add a methyl group (CH3) to produce monomethylmercury (MMHg). Scientists have not identified the reactions responsible for making MMHg. The MMHg does not appear to benefit or harm the bacteria.
6. Monomethylmercury diffuses out of bacterial cells into seawater, where it is taken up by phytoplankton. This starts the journey of MMHg up the oceanic food chain.
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© Woods Hole Oceanographic Institution
©Shane Gross/Greenpeace
Adobe Farmhouse Photography
Getty Images/iStockphoto
Illustration by Eric S. Taylor, WHOI Creative
Illustration by Jack Cook
Illustration by Jayne Doucette
Illustration by Natalie Renier, WHOI Creative
Marine Imaging Technologies, LLC © Woods Hole Oceanographic Institution
Photo by Amy Apprill
Photo by Craig LaPlante
Photo by Daniel Hentz
Photo by Danielle Fino
Photo by Darlene Trew Crist
Photo by Elise Hugus
Photo by Hannah Piecuch
Photo by Jayne Doucette
photo by Jeff Yonover
Photo by Katherine Spencer Joyce
Photo by Ken Kostel
Photo by Marley L. Parker
Photo by Matthew Barton
Photo by ML Parker
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Photo by Véronique LaCapra
Photo courtesy of Woods Hole Oceanographic Institution Archives
Photographie : @alexis.rosenfeld
ROV SuBastian / Schmidt Ocean In
Video by Craig LaPlante
Video by Danielle Fino
Video by Hannah Piecuch
Video by Jayne Doucette
Video by Ken Kostel
Video by Matthew Barton
-- Other --
Illustration by Jack Cook
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@2021 Woods Hole Oceanographic Institution, all rights reserved
@2023 Woods Hole Oceanographic Institution, all rights reserved
© Alexis Rosenfeld
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© C. A. Linder
© Consortium for Ocean Leadership
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Image courtesy of NOAA Ocean Exploration, Deep Connections 2019.
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Photo by Chris Linder, WHOI
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Unless otherwise noted (copyrighted material for example), information presented on this World Wide Web site is considered publi
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-- Other --
© Woods Hole Oceanographic Institution
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