Sentences with phrase «producing photosynthetic»

His research team envisions a series of interacting processes, or feedbacks, that maintained oxygen at very low levels principally by modulating the availability of life - sustaining nutrients in the ocean and thus oxygen - producing photosynthetic activity.

But with our planet as their guide, astrobiologists are forced to acknowledge that oxygen may be the least likely thing they will ever see — genetic evidence suggests the complex oxygen - producing photosynthetic pathway pioneered by cyanobacteria is an extraordinary evolutionary innovation that only appeared once throughout the entire multi-billion-year history of Earth's biosphere.

Not exact matches

«It is difficult to produce large quantities of the desired compounds in microalgae because they have to use a large amount of the produced energy for themselves, since they are fully photosynthetic organisms.

«So basically, the idea is that we hijack a portion of the energy produced by the microalgae from their photosynthetic systems.

The first photosynthetic, oxygen - producing organisms are thought to have evolved more than 2.8 billion years ago.

Heterotrophic bacteria require oxygen, and the new results suggest that there were enough of them around to mop up most of the oxygen produced by photosynthetic organisms.

Photosynthetic chromatophores are bubbles of liquid that form on the membranes of bacteria that harness sunlight, carbon dioxide and water to produce the energy needed for respiration and other functions.

Some plants, such as soybeans, also store fats and can be used as fuel sources, but Bruce Rittmann, Vermaas's colleague at Arizona State, argues that photosynthetic microbes produce nearly 250 times more fat per acre.

By taking ice samples for the last five winters and analyzing for the chlorophyll produced by algae and photosynthetic bacteria, Twiss and his team have determined that from November to April the Lake experiences great primary productivity, more so than in spring or summer.

Most scientists believe photosynthetic bacteria produced the oxygen.

Ozone, which protects us from harmful ultraviolet radiation here on Earth, forms when oxygen produced by photosynthetic organisms (like trees and phytoplankton) synthesizes in light.

Some of the oxygen produced by photosynthetic bacteria was absorbed (oxidized) by iron dissolved in Earth's oceans.

On the other hand, many anaerobic microbes including methanogens are easily poisoned by oxygen, and the recent discovery of banded sediments with rusted iron on Akilia Island in West Greenland suggests that oxygen - producing, photosynthetic microbes (e.g., cyanobacteria) living on the surface of wet areas to gather sunlight may have developed by the end of this geologic period (3.85 billion years ago) despite continuing bombardment from space.

Cyanosite — NASA image of Chroococcidiopsis Dividing Chroococcus sp., a type of cyanobacteria, photosynthetic microbes that also produce oxygen.

Given at least nine meters (roughly 30 feet) of water on the planet, photosynthetic microbes (including mats of algae, cyanobacteria, and other photosynthetic bacteria) and plant - like protoctists (such as floating seaweed or kelp forests attached to the seafloor) could be protected from «planet - scalding» ultraviolet flares produced by young red dwarf stars, according to Victoria Meadows of Caltech, principal investigator at the NASA Astrobiology Institute's Virtual Planetary Laboratory.

Although the idea was designed as a way to potentially produce clean energy, there are implications for recreating a photosynthetic atmosphere as well [source: Chandler].

Oxygen is and has been produced by advanced photosynthetic organisms, first in the ocean and then on land.

In an artificial photosynthetic system, the oxidation of water molecules into oxygen, electrons and protons (hydrogen ions) provides the electrons needed to produce liquid fuels from carbon dioxide and water.

These mats are likely composed of, among other bacteria, Chloroflexus, a filamentous photosynthetic microbe (yes, it produces energy from sunlight like plants do!)

When printed in a precise pattern onto carbon nanotubes on paper, these photosynthetic bacteria can produce electricity from sunlight, which could power biodegradable environmental and medical sensors.

However, it is too chemically reactive to remain a free element in Earth's atmosphere without being continuously replenished by the photosynthetic action of living organisms, which use the energy of sunlight to produce elemental oxygen from water.

100 Gt C is about 8.33 E3 Tmol of C. From Hartmann, «Global Physical Climatology», the amount of O2 in the atmosphere is about 209500 ppm (molar ratio in dry air), or 1.185 million Gt, which is about 37030 E3 Tmol of O2, which is about 4450 times the moles of O2 that are produced by photosynthetic uptake of 100 Gt of C; photosynthetic uptake of 100 Gt of C would, if all O2 remained in the atmosphere, increase atmospheric O2 by about 0.0225 % (relative to the total O2).

The plant produces fluorescent light when sunlight excites the photosynthetic pigment chlorophyll.

Dr. Kiang also relates this work to research in astrobiology, particularly with regard to how photosynthetic activity produces signs of life at the global scale (e.g., biogenic gases like oxygen and photosynthetic pigments like chlorophyll) and how these may exhibit adaptations to alternative environments on extrasolar planets, resulting in other «biosignatures» that might be detected by space telescopes.