Results 21 to 30 of about 416,729 (302)

A comparative study of seismic tomography models of Southwest ChinaKey points

open access: yesEarthquake Science, 2023
The margin of the Tibetan Plateau of Southwest China is one of the most seismically active regions of China and is the location of the China Seismic Experimental Site (CSES). Many studies have developed seismic velocity models of Southwest China, but few
Xuezhen Zhang, Xiaodong Song, Feiyi Wang
doaj   +1 more source

Bottom sediments of lake rotoma [PDF]

open access: yes, 1983
Lake Rotoma is a deep (70–80 m), oligotrophic, warm monomictic lake of volcanic origin with insignificant stream inflow and no clearly defined outflow. For at least 60 years up to 1972 the lake level fluctuated markedly about an overall rising trend of ...
Nelson, Campbell S., Campbell S. Nelson
core   +1 more source

Hydrocarbon influence on denitrification in bioturbated Mediterranean coastal sediments [PDF]

open access: yes, 1997
An in situ experiment has been carried out inbioturbated Mediterranean coastal marine sediments (Gulfof Fos) in order to study the influence of hydrocarbons ondenitrification after 1, 4 and 6 months. In theabsence of hydrocarbons in the control sediments,
Bonin, Patricia   +6 more
core   +1 more source

FIRST EVIDENCE OF COLOR PATTERNS ON CONCHS OF THE LOWER MOSCOVIAN (MIDDLE PENNSYLVANIAN) COILED NAUTILOIDS FROM THE DONETS BASIN, UKRAINE

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2023
New finds of well-preserved remains of coiled nautiloids from lower Moscovian sediments (Kamenskaya Formation) of the Donets Basin (eastern Ukraine) allowed to describe the color pattern on the conch surface of species of the genera Parametacoceras ...
Vitaly Dernov
doaj   +1 more source

Influence of Chironomus riparius (Diptera, Chironomidae) and Tubifex tubifex (Annelida, Oligochaeta) on oxygen uptake by sediments. Consequences of uranium contamination [PDF]

open access: yes, 2009
The diffusive oxygen uptake (DOU) of sediments inhabited by Chironomus riparius and Tubifex tubifex was investigated using a planar oxygen optode device, and complemented by measurements of bioturbation activity.
Lagauzère, Sandra   +13 more
core   +1 more source

A Classification Scheme for Sediments and Habitats on Exposed Intertidal Flats with Multi-Frequency Polarimetric SAR

open access: yesRemote Sensing, 2021
We developed an extension of a previously proposed classification scheme that is based upon Freeman–Durden and Cloude–Pottier decompositions of polarimetric Synthetic Aperture Radar (SAR) data, along with a Double-Bounce Eigenvalue Relative Difference ...
Wensheng Wang   +5 more
doaj   +1 more source

Coupled anoxic nitrification/manganese reduction in marine sediments [PDF]

open access: yes, 1999
Pore water and solid phase distributions of oxygen, manganese, and nitrogen from hemipelagic and shelf sediments sometimes indicate a close coupling between the manganese and nitrogen redox cycles.
Franck Gilbert   +5 more
core   +1 more source

Burial and reactivity of sedimentary microalgal lipids in bioturbated Mediterranean coastal sediments [PDF]

open access: yes, 2003
The fate of microalgal lipid biomarkers in marine coastal sediments when acted on by natural bioturbation processes (Carteau Bay, Gulf of Fos, Mediterranean Sea) was studied under laboratory conditions.
Caradec, Sarah   +2 more
core   +1 more source

Organically bound tritium in sediments from the Severn Estuary, UK [PDF]

open access: yes, 2006
Amersham plc, now GE Healthcare, has discharged both organically bound tritium (OBT) and tritiated water (HTO) into the Severn estuary since 1981. The OBT component of these discharges results in elevated tritium (3H) activities in the sediments and ...
Morris, Jennifer Ellen, Morris, J.E.
core   +1 more source

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