chemosynthesis


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chemosynthesis

 [ke″mo-sin´thĕ-sis]
the building up of chemical compounds under the influence of chemical stimulation, specifically the formation of carbohydrates from carbon dioxide and water as a result of energy derived from chemical reactions. adj., adj chemosynthet´ic.

che·mo·syn·the·sis

(kē'mō-sin'thĕ-sis),
1. Chemical synthesis.
2. Chemolithotrophy.

chemosynthesis

(kē′mō-sĭn′thĭ-sĭs, kĕm′ō-)
n.
The synthesis of organic compounds by certain bacteria, especially in deep-sea hydrothermal vents, using energy obtained from the chemical oxidation of simple inorganic compounds. Chemosynthesis is thought to have been used by the first forms of life on Earth.

che′mo·syn·thet′ic (-sĭn-thĕt′ĭk) adj.
che′mo·syn·thet′i·cal·ly adv.

chemosynthesis

the process of obtaining energy and synthesizing organic compounds from simple inorganic reactions. This is brought about by special methods of respiration involving the oxidation of inorganic compounds such as iron, ammonia and hydrogen sulphate, and is carried out by several kinds of CHEMOAUTOTROPHIC bacteria. See AUTOTROPH, NITROGEN CYCLE.
References in periodicals archive ?
The reaction pathways of magnetosomes formation and new chemosynthesis of magnetite nanoparticle preparation are shown in Figure 1.
Students are expected to describe how hydrothermal vents are formed and characterize the physical conditions at these sites, explain chemosynthesis and contrast this process with photosynthesis, identify autotrophic bacteria as the basis for food webs in hydrothermal vent communities, and describe common food pathways between organisms typically found in hydrothermal vent communities.
Below a certain depth, life only continues to exist because it receives a contribution or subsidy from above (the only exceptions are the "oases" at great depths, which are maintained by chemosynthesis around submarine hydrothermal vents, described in chapter 3.5, section 1 of this volume).
Narbonne and others suggest that some organisms may have survived below the thick ice through chemosynthesis, which draws energy from chemical reactions instead of from sunlight.
Instead of photosynthesis, these creatures use chemosynthesis to convert highly toxic water into the staff of life.
Here the JASON team will undertake its most ambitious scientific expedition yet, Life in the Sea: Photosynthesis and Chemosynthesis.
Splenic [CD4.sup.+] Th17 lymphocytes were transfected with chemosynthesis MBD2 siRNA sequence (S) 5-GTTTGGCTTAACACA TCTCAA-3; and IRF4 siRNA sequence (S) 5-GCCA GACAACTGTATTACTTT-3;.
There are unique ecosystems in the ocean that are driven by chemosynthesis. Whale-fall communities are one of these reducing habitats, and many unknowns are left to be resolved to understand their uniqueness.
Scientists in Alvin at the Galapagos Rift explored previously unknown and unexpected communities of deep-sea organisms that thrive in the absence of sunlight, sustained not by photosynthesis but by chemosynthesis. The discovery transformed conceptions of how and where life can exist.
Distinct ecological and sea floor conditions in the sanctuary mean that primary production (the creation of organic compounds through photosynthesis or chemosynthesis) in the area is very high and supports a diversified food chain.
During the chemosynthesis of n-HA, aqua ammonia was used to adjust the PH value to 8~13.