Examples of using Sediment cores in English and their translations into Russian
{-}
- 
                                                                                        Official
                                                                                    
 - 
                                                                                        Colloquial
                                                                                    
 
Dated sediment cores indicate very slow degradation rates of HBCD.
In the most recent studies(Zegers et al. 2003) sediment cores from Norway, the Netherlands and Germany.
Dated sediment cores indicate no degradation over a period of> 30 years Kohler 2008.
A clear trend of the presence of PeCB in the environment can be derived from its presence in sediment cores.
A mountain science project might aim to take sediment cores in high-altitude lakes to determine long-term climate change patterns.
For Austria, France, Italy andSpain, there is information on long-term trends from sediment cores.
Three dated sediment cores from locations in Western Europe were analyzed for 14 BDE congeners Zegers et al., 2003.
Bogdal et al.(2008)reported increasing HBCD concentrations up to the surface layer in two sediment cores from Lake Thun.
HBCD was present in three sediment cores and six surface sediment  samples collected in 2002 from Tokyo Bay, Japan Minh et al. 2007.
This related to the definition of geomorphological domains of the Yuzhmorgeologiya claim area and analysing sediment cores.
Data on concentrations in sediment cores presented by Gevao et al.(2000) indicate that the peak production of PCN precede that of PCB by 20-30 years.
The findings are in agreement with those from Bogdal et al.(2008)who observed a CN peak at the mid-1950s in sediment cores from a Swiss alpine lake.
In sediment cores from a remote lake in Switzerland BDE-209 levels increased steadily in the period from 1990s to 2001 with a doubling time of about 9 years Kohler 2008.
SCCPs are not expected to degrade significantly by hydrolysis in water,and dated sediment cores indicate that they persist in sediment  longer than 1 year.
In sediment cores at Ketelmeer(the Netherlands), PeCB is apparently persistent, i.e., several years in the presence of native anaerobic microflora.
Work was also needed to reconstruct the past ecosystem status using all available techniques,such as sediment cores, tree rings and pollen records.
In the Canadian Arctic, total SCCP concentrations in sediment cores(0-1 cm depth) ranged from 1.6 to 17.6 ng/g dry wt. in three remote lakes Tomy et al. 1998a, Stern and Evans 2003.
Other areas of basic research included the study of drift pumice in the Basin, relationships between the chemical composition andmagnetic susceptibility in sediment cores and petrology.
Sediment cores from urban/polluted areas show doubling times for BDE-209 between 5.3 and 8.4 years Chen 2007b, Kwan 2014, Zhu and Hites, 2005, Zegers 2003; UNEP/POPS/POPRC.10/INF5 Table 5.1.
For example, do you see your project as an international team of researchers taking sediment cores in a high mountain lake, or do you see yourself as a group of climbers summiting a new mountain peak?
In dated sediment cores taken from lakes in Ontario, Quebec and northern New York State along a latitudinal transect in North America, BDE-209 was generally detected only in recent sediment  horizons, and sedimentation fluxes were found to decline exponentially with latitude Breivik 2006.
SCCPs are not expected to degrade significantlyby hydrolysis in water, and degradation studies and dated sediment cores indicate that they persist in sediment  longer than 1 year.
A reasonable sampling strategy would consist of sediment cores taken at 1 km intervals starting at the margin of the deposit and extending at least 10 km along the four cardinal points.
Studies of sediment  characteristics consisted of an analysis of the water content of cores,  a description of the core  profiles in the contractor's preservation and benthic impact experiment sites, an assessment of sediment  flux to the seabed using time-series sediment  traps at two locations, and an analysis of carbon(organic and inorganic)and nitrogen within sediment cores.
However, the fact that SCCP residues were detected in sediment cores dating back to the 1940s at these locations is evidence that SCCPs can persist for more than 50 years in subsurface anaerobic sediments. .
Sediment cores from the industrially impacted area from Lake Ontario near the mouth of the Niagara River(Canada) show an increase in PeCB concentration from early 1900 until the period 1960-1970(peak concentration of over 100 ug/kg) after which concentrations declined to about 10% of the peak concentration by 1980 ICCA/WCC, 2007 citing Durham and Oliver, 1983 and NYDEC, 1998.
Some data on-HCH levels in sediment cores 30-40 years of age indicate long half-lives of-HCH in sediments  from different geographical areas Barra et al., 2001; Rawn et al., 2001; Riching et al., 2005.
Several studies using sediment cores show that PentaBDE congeners deposited in European marine sediments  at the beginning of 1970s are still present in significant amounts, indicating high persistency in sediments  Covaci et al. 2002a, Nylund et al. 1992, Zegers et al. 2000, Zegers et al. 2003.
Several studies using sediment cores show that HBCD congeners deposited in marine sediments  in Asia and in Europe at the beginning of the 1970s/1980s are still present in significant amounts(Minh et al. 2007, Tanabe 2008, Kohler et al. 2008, Bogdal et al. 2008), indicating a higher persistency in sediments  than derived from experimental studies.
Several sediment core analyses performed in Asia and Europe show higher levels of HBCD in the top layers and lower concentrations in the deeper layers.