Video Experimental Relacionado
Updated: Jul 16, 2026
09:08
From a Natural Product to Its Biosynthetic Gene Cluster: A Demonstration Using Polyketomycin from Streptomyces diastatochromogenes Tü6028
Published on: January 13, 2017
Dos compuestos halogenados bioacumulados abundantes son productos naturales
Emma L Teuten1, Li Xu, Christopher M Reddy
1Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
Science (New York, N.Y.)
|February 12, 2005
Resumen
Los éteres difenílicos polibromados metoxilados (MeO-PBDEs) se encuentran en animales acuáticos. El análisis de radiocarbono de MeO-PBDE de una ballena revela que estos compuestos se producen naturalmente, no son contaminantes industriales.
Área de la Ciencia:
- Química del medio ambiente Química del medio ambiente
- Biología Marina Biología Marina.
- La geoquímica orgánica es la geoquímica orgánica.
Sus antecedentes:
- Los éteres difenílicos polibromados metoxilados (MeO-PBDEs) se detectan en organismos acuáticos en niveles similares a los contaminantes conocidos.
- Las fuentes de MeO-PBDE siguen siendo ambiguas, con orígenes tanto naturales como industriales propuestos.
Objetivo del estudio:
- Investigar el origen de los MeO-PBDE encontrados en la fauna marina.
- Para determinar si las MeO-PBDE se producen de forma natural o son de origen antropogénico.
Principales métodos:
- Aislamiento de dos congéneres de MeO-PBDE de los tejidos de una ballena de pico verdadero (Mesoplodon mirus).
- Análisis de la abundancia natural del contenido de radiocarbono (14C) en los MeO-PBDE aislados.
Principales resultados:
- El contenido de radiocarbono de los MeO-PBDE analizados indica un origen biogénico.
- Los hallazgos proporcionan evidencia directa de la producción natural de estos compuestos.
Conclusiones:
- Los MeO-PBDE que se encuentran en los mamíferos marinos pueden producirse de forma natural.
- Este estudio resuelve la incertidumbre con respecto a la fuente de MeO-PBDEs, destacando una vía natural para su formación.
Más Videos Relacionados
Videos de Conceptos Relacionados
01:12Carbon Skeletons
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side chains...
00:54What are Biogeochemical Cycles?
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.
01:14The Carbon Cycle
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
03:02Organic Compounds
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
01:20Overview of Nitrogen Metabolism
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this nitrogen...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this nitrogen...
01:25Compounds Essential to Human Function
The human body is composed of cells that are fundamentally made up of several different molecules. These molecules are essential to carry out all physiological processes in the body and are broadly classified into organic and inorganic based on their chemical structures.
Inorganic Compounds Essential to Human Functioning
Inorganic compounds essential to human functioning include water, salts, acids, and bases. These compounds are inorganic, i.e., they do not have a carbon-hydrogen bond. Water...
Inorganic Compounds Essential to Human Functioning
Inorganic compounds essential to human functioning include water, salts, acids, and bases. These compounds are inorganic, i.e., they do not have a carbon-hydrogen bond. Water...