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Image of the Week

SEPTEMBER & OCTOBER 2021

Week 39 (26 - 02)

Image credit: CC0 Public Domain.

Source: https://phys.org/news/2021-09-defense-african-salmonella-viruses.html

Week 38 (19 - 25)

Researchers gained new insights into the mechanisms some methane-feeding bacteria called methanotrophs use to break down the toxin methylmercury.

Image credit:Andy Sproles/ORNL, U.S. Dept. of Energy; Jeremy Semrau/Univ. of M.

Source: https://phys.org/news/2021-09-microbial-theft-enables-breakdown-methane.html

Week 37 (12 - 18)

Pathways and sources of micro- and nanoplastics (MNP) and organic contaminants in farmland soils. Atmospheric input, tire wear, and common agricultural practices like the application of compost, biosolids from waste water treatment plants (WWTP), or mulching introduce MNP and organic contaminants to the soil. Physical and chemical degradation of plastics, e.g., by UV irradiation causes their fragmentation to MNP. Bioturbation, tilling or preferential flow paths enhance vertical transport of MNP. a MNP containing organic contaminants are suspected to vertically relocate them towards the groundwater table. b If contaminants are in equilibrium, MNP do not enhance contaminant relocation; c if the transport is decoupled, no significant desorption of contaminants occurs during transport and MNP facilitate as vector their relocation. Establishing equilibrium of contaminants with plastics and all soil phases is faster for smaller MNP than for larger MNP.

Image credit: DOI: 10.1038/s43247-021-00267-8.

Source: https://phys.org/news/2021-09-microplastics-contribute-mobility-pollutants-agricultural.html

Week 36 (05 - 11)

A 3-MDa complex shows a complex electron-transfer pathway in which a conformational change gates electron flow to and from the center of flavin-based electron bifurcation (FBEB). High-energy electrons from FBEB are directly transferred to the site of CO2 reduction. Hdr = Heterodisufide reductase, Fdh = Format dehydrohenase, Fmd= formylmethanofuran dehydrogenase.

Image credit:Max Planck Institute of Biophysics/Shin.

Source: https://phys.org/news/2021-09-wired-efficiency-methanogenic-microbes-electrons.html

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