Results 61 to 70 of about 45,064 (208)

Diverse diazotrophs are present on sinking particles in the North Pacific Subtropical Gyre. [PDF]

open access: yes, 2019
Sinking particles transport carbon and nutrients from the surface ocean into the deep sea and are considered hot spots for bacterial diversity and activity.
Collins, James R   +6 more
core   +1 more source

Selecting indicator-diatom taxa and its application for simplifying trophic diatom index for biological water quality assessment

open access: yesJournal of Ecology and Environment
Background : : Trophic diatom index (TDI) should have been conducted annually by 'water environment conservation act' since 2008 in South Korea. However, its application had difficulties in identification such as fine structures and diversity of diatoms.
Seoung Min Kim, Jung Ho Lee
doaj   +1 more source

DSK1, a novel kinesin-related protein from the diatom Cylindrotheca fusiformis that is involved in anaphase spindle elongation. [PDF]

open access: yes, 1996
We have identified an 80-kD protein that is involved in mitotic spindle elongation in the diatom Cylindrotheca fusiformis. DSK1 (Diatom Spindle Kinesin 1) was isolated using a peptide antibody raised against a conserved region in the motor domain of the ...
Brady, B   +3 more
core   +2 more sources

Expressions of climate perturbations in western Ugandan crater lake sediment records during the last 1000 years [PDF]

open access: yesClimate of the Past, 2014
Equatorial East Africa has a complex regional patchwork of climate regimes, sensitive to climate fluctuations over a variety of temporal and spatial scales during the late Holocene.
K. Mills   +4 more
doaj   +1 more source

Factors influencing the stable carbon isotopic composition of suspended and sinking organic matter in the coastal Antarctic sea ice environment [PDF]

open access: yes, 2011
A high resolution time-series analysis of stable carbon isotopic signatures in particulate organic carbon (&delta;<sup>13</sup>C<sub>POC</sub>) and associated biogeochemical parameters in sea ice and surface waters provides an
Annett, A.L.   +9 more
core   +7 more sources

Trophic history of French sub-alpine lakes over the last ~150 years: phosphorus reconstruction and assessment of taphonomic biases

open access: yesJournal of Limnology, 2013
Like many lakes worldwide, French sub-alpine lakes (lakes Annecy, Bourget and Geneva) have suffered from eutrophication in the mid-20th century. Although restoration measures have been undertaken and resulted in significant reductions in nutrient inputs ...
Vincent Berthon   +6 more
doaj   +1 more source

Estuarine sediment toxicity tests on diatoms: Sensitivity comparison for three species

open access: yesEstuarine, Coastal and Shelf Science, 2007
10 páginas, 4 figuras, 3 tablas. Experimental populations of three marine and estuarine diatoms were exposed to sediments with different levels of pollutants, collected from the Aveiro Lagoon (NW of Portugal). The species selected were Cylindrotheca closterium, Phaeodactylum tricornutum and Navicula sp.
Moreno-Garrido, Ignacio   +4 more
openaire   +3 more sources

Physiological and biochemical responses of a marine diatom Phaeodactylum tricornutum exposed to 1-octyl-3-methylimidazolium bromide

open access: yesAquatic Biology, 2015
The marine diatom Phaeodactylum tricornutum is an important basal resource in the marine food chain and is used as a standard test organism in toxicological studies.
XY Deng, J Cheng, XL Hu, K Gao, CH Wang
doaj   +1 more source

Silicon consumption and population density changes of dominant planktonic diatoms in Lake Constance [PDF]

open access: yes, 1983
(1) Interactions between silicon concentration and diatom growth have been studied in Lake Constance with data on number and volume of cells per unit volume of water and concentration of dissolved reactive silicon. (2) Concentration of dissolved reactive
Sommer, Ulrich, Stabel, H.-H.
core   +1 more source

Functional characterization of the diatom cyclin-dependent kinase A2 as a mitotic regulator reveals plant-like properties in a non-green lineage [PDF]

open access: yes, 2015
Background: Cyclin-dependent kinases (CDKs) are crucial regulators of cell cycle progression in eukaryotes. The diatom CDKA2 was originally assigned to the classical A-type CDKs, but its cell cycle phase-specific transcription at the G2-to-M phase ...
Bowler, Chris   +4 more
core   +2 more sources

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