Sentences with phrase «oxygen species when»

This symptom results from accumulation of porphyrins, tetrapyrrole intermediates in heme biosynthesis that generate reactive oxygen species when exposed to light, in the skin of affected individuals.

Not exact matches

When potent oxygen radical scavengers such as cerium oxide nanoparticles (nanoceria) were combined with a highly charged polymer (polyacrylic acid) and incorporated into extracted chloroplasts using the LEEP process, damage to the chloroplasts from superoxides and other reactive oxygen species was dramatically reduced.

But when the lights go on, TAPP becomes active, producing chemicals called reactive oxygen species, or ROS, that rapidly kill the bacteria.

But late in the Triassic period — between 210 million and 220 million years ago, when oxygen levels were similar to those of today — one species closely related to today's grasshoppers had wings ranging from 15 to 18 cm long, he notes.

Reporting this week in the journal Global Change Biology scientists from British Antarctic Survey (BAS) and from Germany's University of Kiel and the Alfred Wegener Institute reveal that when it comes to environmental change the reaction of Antarctic clams (laternula elliptica)-- a long - lived and abundant species that lives in cold, oxygen - rich Antarctic waters — is different depending on how old the animal is.

Although reactive oxygen species can damage cells when produced in high amounts, according to a study published online Sept. 5, 2017 by Science Signaling and featured on the journal's cover, these oxidative species are crucial signals that start the process of repairing myofiber.

«Our work highlights the need to take a nuanced view of the role of reactive oxygen species, as they are necessary when they are present at the right place and right time.

When O3 interacts with a metal oxide (Mn / TiO2), O3 is decomposed by the following reactivity formula on the surface of manganese, generating reactive oxygen species, i.e., oxygen radical.

This is a key component of the immune system, when the body releases reactive oxygen species to fight against invading bacteria.

Not only can they hide from mackerel amongst the jellies» stinger - covered tentacles when they rise from the seafloor to feed and digest at night, they can also survive for hours within the ocean floor's low - or no - oxygen muds, which are pervaded by poisonous hydrogen sulfide gas — an inhospitable place lacking any other vertebrate species.

That phenomenon, known as oxidative stress, occurs when the cells of older adults begin to produce too much superoxide and other reactive oxygen species.

Although the Cambrian explosion generated a large number of new phyla of Earth - type life, it actually crashed in a mass extinction not long after it began when oxygen levels fell and hydrogen sulphide levels rose again so that biodiversity at the family, genus, and species levels was decreasing around 515 million years ago (Gill et al, 2011; and Michael Marshall, New Scientist, January 5, 2011).

Itâ $ ™ s not a silly question, when one sees how oxidative stress and reactive oxygen species have been implicated in so many diseases, ranging from hypertension and atherosclerosis to neurodegenerative disorders.

So while it's true that organisms living deep in the Earth are not exposed to the high - energy radiation found when you travel between planets or more hypothetically between stars, the systems that cells have evolved to repair damage done by reactive oxygen species will be useful whether they arise from rocks or from cosmic rays.

This primary response involves the production of reactive oxygen species (ROS), which are molecules that can act like tiny bombs when released by the plant cell at the offending pathogen.

It has been thoroughly researched and shown that the overall health of a body is intrinsically linked to the health of its cells and their ability to metabolize oxidation.5 When oxidative metabolism's limits are exceeded free radicals and reactive oxygen species (ROS) are created and start to build up within the body.

As a general rule, the shorter the carbon chain, the more efficiently the MCT will be turned into ketones, which are an excellent source of energy for your body — far preferable to glucose, as ketones produce far less reactive oxygen species (ROS) when they are metabolized to produce ATP.

Known as «delayed onset muscle soreness» (DOMS), we typically experience these pains when eccentric muscle activity is involved and the contracting muscles are forcibly lengthened.1 This mechanical stress triggers an inflammatory response and the production of reactive oxygen species (ROS).

Generation of reactive oxygen species, or free radicals such as superoxide and hydrogen peroxide, is a normal byproduct of metabolism, but can damage cellular machinery when excessive and impair the production of cellular energy, which becomes a vicious cycle as energy - intensive repair processes become untenable (25, 26).

When your body is able to burn fat for fuel, your liver creates water - soluble fats called ketones that burn far more efficiently than carbs, thereby creating fewer reactive oxygen species (ROS) and secondary free radicals.

However, it's natural for living organisms to trash the planet as they divide and consume — just look at all of the organisms that went extinct over 2 million years ago when selfish photosynthetic bacteria began spewing oxygen into the atmosphere and eradicating countless species of anaerobic bacteria.

But pollution also covers hundreds of chemicals which are fine or even beneficial at low levels but which if released in large quantities or in problematic circumstances cause «harm» — like phosphorus (grows your veges but also leads to toxic cyanobacterial blooms which kill cattle), nitrogen (grows crops kills many native species of plants and promotes weed growth costing farmers), copper (used as an oxygen carrier by gastropods but in high concentrations kills the life in sediments which feed fish), hormones like oestrogen (essential for regulating bodies but in high concentrations confuse reproductive cycles especially with marine life) or maybe molasses from a sugar mill (good for rum but when dumped into east coast estuaries used to cause oxygen sag in estuaries leading to massive fish kills).