Sentences with phrase «of diatoms»

«There are 2,500 species of diatoms in India alone,» says Balasubramanian, who is writing his doctoral thesis on these algae.

Might be some proxy for total primary productivity, or biomass, or respiration, or photosynthesis, or chemistry of diatom shells or lack thereof in each slice of the sediment core.

DE is a fine powder made from the fossilized remains of diatoms, a type of algae.

Diatomaceous Earth (DE) is made of diatoms from fresh water shells that have fossilized over millennia.

A new mechanism for emplacement and concentration of diatoms in subglacial deposits.

Previously, many water managers in the region had believed that the algae blooms of the diatom Didymosphenia geminata — which resemble blobs of wet toilet paper or shag rugs — resulted from an invasive species problem starting in the mid-2000s that could be fixed by regular washing of fishing gear and other sanitation measures.

The aim of my PhD is to use the distribution of diatom species preserved in sediment cores across the Scotia Sea to reconstruct the position of major ocean boundaries and water masses through time.

The first took place from June to August 2011, when large numbers of diatoms (a type of microscopic alga) bloomed near the surface, then sank rapidly to the seafloor.

They compared isotope measurements on the silica skeletons of diatoms, which store environmental signals from the ocean's surface, with isotope signals from radiolarians, which live in deeper water layers.

One beneficiary of this young researcher exchange program was Matthew Julius, who studies the evolution of diatoms, a group of microscopic algae, now at St. Cloud State University in Minnesota.

Scientific analysis of diatom oil has shown that it is very suitable for use as biofuel, says T. V. Ramachandra, a professor of ecological sciences at the Indian Institute of Science (IISc) here who is working on this project with IISc researchers Durga Mahapatra and Karthick Balasubramanian, along with Richard Gordon, a radiology professor at the University of Manitoba in Winnepeg.

Might be some proxy for total primary productivity, or biomass, or respiration, or photosynthesis, or chemistry of diatom shells or lack thereof in each slice of the sediment core.

When a flea, ant, spider, etc comes into contact with the remaining sharp edges of the diatoms, they lacerate the waxy exoskeleton of the bug and the powder DE (diatomaceous earth) absorbs the body fluids causing death by dehydration.

Decreases in atmospheric CO2 are associated with reductions in populations of CO2 producing coccolithophorids along with increasing populations of diatoms that pumped CO2 to depth.

God would identify with the subjective sensations and aspirations of diatoms, rattlesnakes, beetles, and «all things counter, original, spare, strange» (Gerard Manley Hopkins, «Pied Beauty»).

One out of every two breaths that we take comes from the photosynthesis of those diatoms, Smith adds.

One type of diatom shell that he saw, shaped like a short, segmented worm, is extinct today but lived between 10 million and six million years ago.

Biologists from the University of Geneva (UNIGE), Switzerland, have succeeded in establishing a water quality index based solely on the DNA sequences of the diatoms present in the samples, without needing to identify each species visually.

This is the case of diatoms, algae consisting of a single cell surrounded by a silica skeleton, recommended by the European Union and Switzerland as one of the ideal bioindicators for rivers and lakes.

The different genetic heritages of diatoms, dinoflagellates and cyanobacteria will affect their survival.

By contrast, the shell of the diatom Cyclotella pseudostelligera is silica, the material that makes up sand, glass, and quartz.

But biogeochemist Kenneth Coale, director of Moss Landing Marine Laboratories in California, estimates that the silicon - rich southern part of the Southern Ocean would deliver up to twice as much potential carbon sequestration as the northern area Smetacek fertilized, in large part because of the diatoms and associated ecosystem dynamics.

Typically the thick, opaque ice prevents the blooms, which can consist of diatoms such as these (left).

When they examined the water column for silica - the compound that makes up the hard supporting structure of diatoms — they didn't find much.

Chaetoceros atlanticus, Corethron pennatum, Thalassiothrix antarcticus and nine other species of diatoms grew in abundance, boosting the amounts of chlorophyll, organic carbon and other signs of life in the waters to depths of as much as 100 meters beneath the surface.

Sustainable farming But Ramachandra insists an advantage of the diatom solar panel is that it can be created and maintained with equipment and methods that are inexpensive.

The oil can be as much as a quarter of the total mass of a diatom cell, and if a way could be found to efficiently wrest it from diatoms, he adds, a hectare of «diatom cultivation could produce 10 to up to 200 times the oil that is produced by soybean cultivation,» Ramachandra says.

[2] ii) Photonic nanostructures obtained by in vitro and / or in vivo functionalization of ornate biosilica shells of diatoms microalgae [3] with light - emitting organic molecules.

Diatomaceous Earth (DE) is a finely powdered natural fossilized form of diatoms, a type of algae.

DE is, as mentioned, a white powder naturally occurring from the fossils of diatoms (a type of algae found in river bed and lake beds).

Behold, the fascinating world of diatom art.

We really can't afford to pass the threshold that there is wholesale die off of diatoms and plankton and a subsequent collapse of the ocean's food chains.

When the ACC caused upwelling in southern oceans to intensify, a more reliable supply of nutrients supported the evolution and proliferation of diatoms.

It also failed to include a key sentence regarding the loss of diatoms due to insufficient silicate in the water.

Declining Arctic sea ice reached a milestone in the summer of 1998 when the ice pulled back completely from the Arctic coasts of Alaska and Canada, opening up the Northwest passage through which the diatom may have passed, Reid and colleagues write in their report of the diatom's return published in the journal Global Change Biology in 2007.

Over the next 40 million years corresponding with the rearrangement of the continents and ocean currents, the formation of the Antarctic Circumpolar Current and initiation of Antarctic glaciers, the evolutionary expansion of diatoms and their increasing abundance (diatoms are the most efficient algae for exporting carbon to ocean depths), ocean carbonate chemistry was greatly altered.

required)-- a set of images of the diatom Licmophora ehrenbergii captured by a scanning electron microscope.

As an algae biologist I was initially struck by the cover graphic: a stained glass window made of diatoms, the tiny planktonic creatures whose exquisite outer shells are visible only through the electron microscope.

Dumping iron into the ocean stimulates blooms of diatoms that pull down carbon dioxide in the atmosphere — but only under the right conditions

Beginning about 7,850 years ago, the variety and number of diatoms and water fleas found in the sediment change in a way that indicates the water was becoming shallower and murkier.

This dust, I am sure, is made of the siliceous skeletons of diatoms that have died in the upper stratum of the sea and fallen slowly to the bottom.

Diatoms are also associated with explosive increases in ocean productivity, so it should be no surprise that the earliest appearance and evolution of whales also coincides with increased ACC upwelling and the evolution of diatoms.

When a flea, ant, spider, etc. comes into contact with the remaining sharp edges of the diatoms, they lacerate the waxy exoskeleton of the bug and the powder absorbs the body fluids causing death by dehydration.