Sentences with phrase «by hydrogen sulfide»

Any bad smell is caused by hydrogen sulfide, better known as rotten egg gas.

This function of nitric oxide can apparently also be assumed by hydrogen sulfide (H2S).

«Bo - oxidase's activity is completely inhibited by the hydrogen sulfide, while the work of the bd - oxidases remains untouched by the H2S.

Not exact matches

Janeway also objected to a policy rider that would restrict disclosure of toxic and hazardous air pollution, including ammonia or hydrogen sulfide, released by Concentrated Animal Feeding Operations in rural communities.

By contrast, in the tube worm millions of symbiotic bacteria that dwell within the its large plumes grab hydrogen sulfide and other noxious chemicals that seep from the vents and convert them into food and energy for their host, a process called chemosynthesis.

By looking at the chemistry of rocks deposited during that time period, specifically coupled carbon and sulfur isotope data, a research team led by University of California, Riverside biogeochemists reports that oxygen - free and hydrogen sulfide - rich waters extended across roughly five percent of the global ocean during this major climatic perturbation — far more than the modern ocean's 0.1 percent but much less than previous estimates for this evenBy looking at the chemistry of rocks deposited during that time period, specifically coupled carbon and sulfur isotope data, a research team led by University of California, Riverside biogeochemists reports that oxygen - free and hydrogen sulfide - rich waters extended across roughly five percent of the global ocean during this major climatic perturbation — far more than the modern ocean's 0.1 percent but much less than previous estimates for this evenby University of California, Riverside biogeochemists reports that oxygen - free and hydrogen sulfide - rich waters extended across roughly five percent of the global ocean during this major climatic perturbation — far more than the modern ocean's 0.1 percent but much less than previous estimates for this event.

These orally produced sulfur gases — with names like hydrogen sulfide, methylmercaptan, and dimethyl sulfide — plus some other miscellaneous by - products of bacterial metabolism, account for 90 percent of bad breath that can't be traced to an outside cause.

When the researchers switched the electric current off by deoxygenating the water, thereby removing the electron acceptor at the sediment surface, the depth of the hydrogen sulfide layer in the sediment rose in less than an hour, as deeper microbes could no longer consume it.

So the bacteria evidently form a sort of conductive chain, comprising biological nanowires and possibly pyrite grains embedded in the mud, that allows electrons from the oxidation of hydrogen sulfide and carbon within the sediment to contribute to the reduction of oxygen by other microbes at the sediment surface.

«We think hydrogen sulfide made by the cell can serve as a surrogate energy source,» Mitchell says.

The new work, by James Mitchell at the Harvard School of Public Health and colleagues, suggests that holding back calories causes cells to produce hydrogen sulfide, which somehow makes tissues more resilient and prolongs the life of laboratory organisms.

In 2015, chemists from Cambridge University, led by John Sutherland, who is a co-author on the current study, discovered a way to synthesize the precursors to RNA using just hydrogen cyanide, hydrogen sulfide, and ultraviolet light — all ingredients that are thought to have been available on early Earth, before the appearance of the first life forms.

Meanwhile, hydrogen sulfide, which would have been released in huge amounts by volcanic eruptions, would have mostly stayed in the atmosphere, as the molecule is relatively insoluble in water, and therefore would not have had regular opportunities to interact with hydrogen cyanide.

«We believe we have found an approach that could significantly improve the clinical management of sleep apneas by restoring the balance between two key gasotransmitters in the blood — carbon monoxide and hydrogen sulfide,» said Nanduri Prabhakar, PhD, the Harold Hines Jr..

Professor Songtao Shi, principal investigator on the project, said the presence of hydrogen sulfide produced by the cells governs the flow of calcium ions.

The stinky chemicals found in bad breath are by - products of bacterial metabolism and include hydrogen sulfide and trimethylamine.

By exposing mice to toxic hydrogen sulfide gas, molecular biologist Mark Roth triggers a latent hibernation response that seems to exist in all mammals.

Some autotrophic bacteria are used by EcoVerde (including Theobacilus) to remove hydrogen sulfide and methane; heterotrophic bacteria remove VOCs (volatile organic compounds).

«What we found is a fish with an amazing tolerance to anoxia and hydrogen sulfide that literally holds its breath on the seafloor by day — where it eats lots of carbon - rich mud,» says biologist Mark Gibbons of the University of the Western Cape in Bellville, South Africa, another participant in the study.

The company EcoVerde, by Mexican Humberto Uribe Luis Lobo, designed a new filtration system that removes odor and other pollutants from wastewater through a biological process based on bacteria that feed on hydrogen sulfide, a substance characterized for a rotten egg - like stench.

Using direct hydrogen sulfide measurements collected in the bottom waters by Luther, Cai calculated how much acid would need to be produced to explain this minimum zone.

They produce hydrogen sulfide, which, in combination with nitric oxide (a typical by - product of bacterial metabolism) seems to protect bacteria from antibiotic assaults.

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.

LCROSS also supported this theory when it crashed into the south pole by uncovering, in addition to water, other elements that are abundant on comets: carbon dioxide, hydrogen sulfide, and methane.

For example, its melting point, 0 °C (32 °F), and boiling point, 100 °C (212 °F), are much higher than would be expected by comparison with analogous compounds, such as hydrogen sulfide and ammonia.

Regarding the possible role hydrogen sulfide in the major extinctions you might want to check out another book, one which places it in the context of the methane clathrate gun, the destruction of the coccolithophores which help to maintain an oxygenated atmosphere by ocean acidification, the role of algae blooms, etc...

The process captures and sequesters the carbon dioxide and hydrogen sulfide generated naturally during biological methane production, accelerating renewable methane production rates by 10 percent to 30 percent while sequestering carbon dioxide.

An animal - based diet may trigger IBD by causing microbial enzyme activity in the intestines, which produces a harmful gas called hydrogen sulfide.

When it comes to odorous gas — there may be a number of issues beyond and / or caused by SIBO — malabsorption of fat, protein, hydrogen sulfide production via fermentation — Be sure you are working with a gastroenterologist that is willing to explore other causes along w / perhaps another SIBO test for your ongoing symptoms.

Berkey Shower Filter Reduces Damage to Hair and Skin by Removing Chlorine, Hydrogen Sulfide, Heavy Metals and Other Pollutants.

This flight focuses on detecting sulfur dioxide and hydrogen sulfide contents after it [Mount Agung] has a phreatic eruption on Tuesday,» Umar said on Thursday as quoted by tribunnews.com.

Focusing on the Permian - Triassic boundary, Gregory Ryskin [1] explores the possibility that mass extinction can be caused by an extremely fast, explosive release of dissolved methane (and other dissolved gases such as carbon dioxide and hydrogen sulfide) that accumulated in the oceanic water masses prone to stagnation and anoxia (e.g., in silled basins).

It will strip out most of the dust, 90 percent of the toxic mercury, and 99 percent of the hydrogen sulfide — all of which is required by existing Clean Air Act regulations.

http://www.pnas.org/content/106/43/18045.full About a decade ago, Canfield (1) offered a very different possibility — that ventilation of the deep ocean lagged behind the GOE by more than a billion years, resulting in a vast, deep reservoir of hydrogen sulfide, but long - held presumptions about photosynthetic life in the surface waters remained untouched.

Hydrogen sulfide also damages ozone layer, and fossil spores from the end - Permian era shown deformities that could have been caused by ultraviolet radiation.

To most life, the hydrogen sulfide gas produced by these little monsters is a deadly toxin.

In rock strata, the anoxic, zones are marked by regions of black as the hydrogen sulfide producing bacteria - filled waters eventually take on the color of tar.

What you did not know was that the other half of the book essay from which the post was excerpted concerned Pacific corals, and exposes scientific misconduct in the main paper (omission of data, specifically hydrogen sulfide at the Dobu Island seep with an L50 of 30ppb) on the part of Australian researchers at Milne Bay, misconduct rewarded by prominent mention in the Seattle Times Sea Change series.

Geochemical, biomarker, and isotopic evidence suggests that the end - Permian was characterized by extreme oceanic anoxia that may have led to hydrogen sulfide buildup and mass extinction.

The communities of bacteria around deep sea volcanic (hydrothermal) vents survive by converting highly toxic hydrogen sulfide into food through chemosynthesis much like surface algae convert sunlight to food via photosynthesis.