Manganese Cycling
Manganese Cycling - Related Videos
10:07
Improving Thermoelectric Properties of Bi2Te3 Thin Films By Manganese Co-Sputtering
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2026
A radiofrequency co-sputtering protocol was developed to fabricate manganese-doped Bi2Te3 thin films and evaluate how manganese input influences structural and thermoelectric transport properties. Moderate manganese incorporation improved film uniformity and power-factor-related transport behavior, while higher manganese input increased structural disorder and resistivity.
09:02
Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of Manganese(II) Acetylacetonate
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Cited by 7 •
2020
This protocol details a facile, one-pot synthesis of manganese oxide (MnO) nanoparticles by thermal decomposition of manganese(II) acetylacetonate in the presence of oleylamine and dibenzyl ether. MnO nanoparticles have been utilized in diverse applications including magnetic resonance imaging, biosensing, catalysis, batteries, and waste water treatment.
08:36
Functional Neuroimaging Using Ultrasonic Blood-brain Barrier Disruption and Manganese-enhanced MRI
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Cited by 4 •
2012
A technique is described for broadly opening the blood-brain barrier in the mouse using microbubbles and ultrasound. Using this technique, manganese can be administered to the mouse brain. Because manganese is an MRI contrast agent that accumulates in depolarized neurons, this approach enables imaging of neuronal activity.
00:54
What are Biogeochemical Cycles?
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2019
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles. Biogeochemical Cycles and Decomposition The matter that makes up living organisms, like water, carbon, nitrogen, sulfur and phosphorous, exist in limited quantities within the...
01:00
The Water Cycle
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2019
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics. The water cycle begins as the sun warms surface water on the land and in oceans, causing it to evaporate and enter the atmosphere as vapor. The water vapor condenses into clouds and eventually falls as precipitation in the form of rain, snow or hail. After falling back to the...
FAQs
The key control is redox state, which determines whether manganese remains in a soluble Mn(II) form or becomes part of insoluble manganese oxides. Under conditions favoring oxidation, manganese can be removed from solution and associated with solid minerals. When reduction dominates, those oxides can dissolve. This switching helps explain why manganese availability changes as environmental chemistry changes.
Microorganisms can participate directly in manganese transformations, while chemical oxidants can drive oxidation without biological mediation. These routes may produce the same broad change, conversion of soluble Mn(II) into insoluble manganese oxides, but they reflect different controls. Distinguishing biological from chemical contributions is therefore important when interpreting mineral transformations and microbial interactions in an environment.
Reducing conditions are especially important because they can dissolve manganese oxides and release manganese into solution. That release changes the pool available to organisms and alters the chemical behavior of soils, sediments, and water. In contrast, oxidation can lower dissolved manganese by promoting oxide formation, so shifts in redox conditions can redistribute manganese between solid and dissolved phases.
In biological systems, manganese availability matters because organisms use it in enzymes associated with antioxidant defense and photosynthesis. The cycle therefore links environmental chemistry with cellular function: transformations that alter dissolved or mineral-associated manganese can influence whether this element is accessible for biological use. This connection is particularly relevant when evaluating plant nutrition or microbial metabolism.
Researchers examine manganese cycling when studying contaminant transport because manganese changes between dissolved and mineral-associated forms. Oxide formation can remove manganese from solution, whereas oxide dissolution can release it again. These shifts help explain how changing soil or sediment chemistry may affect the movement of manganese and its interactions with surrounding minerals.
Comparing soils, aquatic environments, rocks, and sediments reveals how strongly local chemistry shapes manganese behavior. The same element may be retained in mineral oxides in one setting or released into solution in another, depending on redox conditions. In biology-focused research, this comparison connects ecosystem chemistry with microbial activity, plant nutrition, and access to manganese-dependent enzymes.