* Heavy metals' concentration in sediment, shrimp and two fish species from the northwest Persian Gulf.
- The concentrations of heavy metals (cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn)) were measured in hepatopancreas and muscle of a commercial shrimp (Metapenaeus affinis), in the muscle, liver and gills of two fish species (Thryssa vitrirostris and Johnius belangerii) and in the sediment samples taken from the mouth of the Arvand river, Meleh estuary and Musa estuary in the northeast Persian Gulf. Concentration of heavy metals varied depending on different tissues, species and sampling sites. Liver of fish and hepatopancreas of shrimp exhibited higher metals' concentration than the other tissues. Generally, in the mouth of the Arvand river, the highest concentration of metals was found in benthic species; while in the mouth of Musa estuary, the highest level of the metals was found in pelagic fish species. Bioaccumulation factors were observed to follow the order: J. belangerii-liver-Cd > T. vitrirostris-liver-Pb > M. affinis-hepatopancreas-Zn >M. affinis-hepatopancreas-Cu >M. affinis- hepatopancreas-Ni. The analysed heavy metals were found in sediment samples at mean concentration in the sediment quality guideline proposed by National Oceanic and Atmospheric Administration (NOAA) and Regional Organization for the Protection of The Marine Environment (ROPME), except for Ni concentration in some cases.
Overview of noun factor
The noun factor has 7 senses (first 4 from tagged texts)
1. (31) factor -- (anything that contributes causally to a result; "a number of factors determined
the outcome")
2. (8) component, constituent, element, factor, ingredient -- (an abstract part of something;
"jealousy was a component of his character"; "two constituents of a musical composition are melody
and harmony"; "the grammatical elements of a sentence"; "a key factor in her success"; "humor: an
effective ingredient of a speech")
3. (4) divisor, factor -- (one of two or more integers that can be exactly divided into another
integer; "what are the 4 factors of 6?")
4. (1) agent, factor, broker -- (a businessman who buys or sells for another in exchange for a
commission)
5. factor -- (any of the numbers (or symbols) that form a product when multiplied together)
6. factor -- (an independent variable in statistics)
7. gene, cistron, factor -- ((genetics) a segment of DNA that is involved in producing a polypeptide
chain; it can include regions preceding and following the coding DNA as well as introns between the
exons; it is considered a unit of heredity; "genes were formerly called factors")
Overview of verb factor
The verb factor has 3 senses (first 1 from tagged texts)
1. (2) factor, factor in, factor out -- (resolve into factors; "a quantum computer can factor the
number 15")
2. factor -- (be a contributing factor; "make things factor into a company's profitability")
3. factor, factor in, factor out -- (consider as relevant when making a decision; "You must factor
in the recent developments")
--- WordNet end ---