Sentences with phrase «organic chemical compounds of»

Not exact matches

All of these scientific hypotheses boil down to first there was an planetary mass covered with water and providing the correct conditions for chemical reactions to create a simple organic compound from which life was formed.

Soy oil is generally separated from flaked soybeans — leaving defatted meal that's ground into flour — using a chemical called hexane, one of the volatile organic compounds that constitutes natural gas, crude oil and gasoline.

Employed on waste water streams, such technologies can achieve up to 99 % COD removal in some types of wastewater (COD, chemical oxygen demand, indicating the amount of organic compounds in water).

Organic Crib Mattress: As the name implies, such mattresses are made of organic materials, and absent of any chemical and industrial compounds — flame retardants, PBDE, vinyl, polyurethane foam, latex, etc., in the fear of them causing unwanted harm to their occupants.

A study published in the Archives of Environmental Health in 1999, found that disposable diapers release chemicals called volatile organic compounds (VOCs), including toluene, ethylbenzene, xylene and dipentene.

Researchers tested the the foam padding in crib mattresses, and found they release significant amounts of volatile organic compounds (VOCs), potentially harmful chemicals also found in household items such as cleaners and scented sprays.

In the 5 June issue of the Journal of the American Chemical Society, a team reports that it has carried out a battery of common organic chemistry reactions using solid compounds, without first dissolving them in the usual solvents.

Three chemists will share the award for developing chemical reactions that enable the building of complex organic compounds with wide applications in medicine, industry and agriculture

Harmful gaseous pollutants in the form of volatile organic compounds are often released into the air when chemicals are used, for example in cleaning products.

The researchers, who released their findings in the current issue of the Journal of Functional Foods, suggest that cruciferous vegetables — such as broccoli, brussels sprouts and cabbage — contain an organic chemical compound called indole glucosinolates, which breaks down into other compounds, including indolocarbazole — ICZ — in the stomach.

HER PROJECT: Stabilizing a fluorescent compound WHAT LED TO THE PROJECT: As the daughter of John Zoltewicz, a longtime professor of organic chemistry at the University of Florida in Gainesville, Susie Zoltewicz grew up hearing about chemical experiments.

Other guidelines may be found at the relevant society website: for example the American Chemical Society gives standards for the characterization of organic and inorganic molecular compounds.

The organic (carbon - containing) compounds they studied in that patch of Colorado forest play a key role in atmospheric chemical processes that can affect air quality, the health of the ecosystem, and the climate itself.

Turning over rocks across the crater, the rover has compiled evidence of ancient water — a lake fed by rivers once occupied the crater itself — and organic compounds and other chemicals essential for life.

In a new study published in the Proceedings of the National Academy of Sciences (PNAS), researchers from Innsbruck, Austria, present the world's first chemical fingerprint of urban emission sources of volatile organic compounds (VOCs).

Biochemist Lars Thelander at the announcement from the Royal Swedish Academy of Sciences: «Palladium - catalyzed cross-coupling has made it possible to synthesize carbon based molecules, for example, new medicines, agricultural chemicals and organic compounds used in the electronics industry.»

Cold, sluggish Titan has evolved much more slowly, so the dirty orange organic chemicals that tint its surface — most likely dominated by tarry compounds called tholins — could be a deep - freeze model of early Earth.

They also correlated the amount of energy found in the sample to its chemical oxygen demand (COD), a commonly used indirect measurement of dissolved organic compounds.

But the data were inconclusive regarding the most intriguing chemicals: complex organic compounds, which are considered a necessary component of life.

Like vehicles and power plants, trees emit airborne chemicals called volatile organic compounds (VOCs), which in the presence of sunlight react with nitrogen oxides in vehicle fumes to form ozone, one of the components in smog that makes it a health threat.

They were looking for a site with a venting process that produces a lot of hydrogen because of the potential it holds for the chemical, or abiotic, creation of organic molecules like methane — possible precursors to the prebiotic compounds from which life on Earth emerged.

One of the Holy Grails in chemical science has been to find the late - stage, site - specific incorporation of a halogen atom into a complex natural product by replacing an sp ³ C - H bond (one of the most inert chemical bonds known in an organic compound) with a C - X bond (X = halogen).

Chemists at The University of Texas at Arlington have devised a safer, more environmentally friendly, less expensive and more efficient water - based system for the synthesis of organic compounds typically used in pharmaceuticals, agrochemicals, cosmetics, plastics, textiles and household chemicals.

In order to investigate the formation of the extremely low - volatility organic compounds the team has studied five abundant biogenic organic compounds with different chemical structures.

As crude oil burns it releases many toxic chemicals, including lead, carbon monoxide, polycyclic aromatic hydrocarbons and volatile organic compounds, says Bin Jalaludin at the University of New South Wales in Australia.

However, the types of organic compounds found in plant matter — dominated by aromatic hydrocarbons — underwent some chemical changes, but remained relatively resistant to impact pressures.

Dirty laundry smells bad because of certain chemicals called volatile organic compounds, which can't always be washed out on an eco-friendly 20 ˚C cycle, according to a new study in the Journal of Chromatography A.

The samples revealed that the ratios among certain «volatile organic compounds» (chemicals that can be a source of scents and odors) in the atmosphere increase or decrease along specific directions.

The sensor works by measuring levels of chemicals called volatile organic compounds present in exhaled breath.

They also used chemical analysis of organic compounds in the scales to infer the dinosaur's pigmentation pattern.

The main objective of the Institute conducted fundamental research - to obtain new data on the structure and transformations of organic compounds, their mechanism of chemical reactions, the synthesis of organic compounds, new classes, new opening reactions, the development of new catalysts and to investigate the relationship of their structure to the catalytic activity.

There is growing interest in and legitimization of theories that the chemical and thermal conditions found in some vent waters may permit the synthesis of organic compounds.

protein One of many large and complex organic chemical compounds on which life depends.

New volatile organic compounds used in construction and industry have now been recognised, along with other agents, such as sulphites, chlorates, isocyanates and many other chemicals already known to be potentially toxic, as causes of chronic asthma.

ORGANIC COMPOUNDS Organic compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or COMPOUNDS Organic compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.

However, the types of organic compounds found in plant matter — dominated by aromatic hydrocarbons - underwent some chemical changes, but remained relatively resistant to impact pressures.

On top of that, new carpets can also off - gas toxic chemicals called volatile organic compounds (VOCs) when you first bring them into your home.

The claim that a product is «natural» is one to pay special attention to, because it can be used by companies to get around organic certification, and because the meaning of the word is easily stretched and manipulated — after all, even the most complex chemical compound can be traced to a natural source at some point on its journey to the supermarket shelf.

[12] An organic chemical compound (or related set of compounds) is called a vitamin when it can not be synthesized in sufficient quantities by an organism, and must be obtained from the diet.

The eco-INSTITUT evaluates the latex for an extensive list of chemicals including: formaldehyde, VOCS (volatile organic compounds), heavy metals, pesticides, phthalates, and other potentially harmful chemicals.

This means that the company has used only one organic compound and then used the organic label to describe what might otherwise be a soup of chemicals.

It means they're scientifically tested to meet some of the world's most rigorous emissions standards for chemical exposure and pollutants, such as volatile organic compounds (VOCs), formaldehyde and phthalates.

«My instinct is that it only makes sense to prevent children's exposure to chemicals known to affect the nervous system, and those include pesticides, solvents, many volatile organic compounds, metals, PCBs, and thousands of other poorly tested synthetic chemicals now in commerce.

The Paris - based artist's series of works with polythene (a chemical and organic compound used for everyday plastic packaging and containers) is set alongside the US - born Cruces» meshen image - objects and vacuum - sealed still lifes.

Furniture (especially particle board), carpeting, and paint are common sources of volatile organic compounds (VOCs), a family of chemicals that are frequently «offgassed.»

Even some traditional cleaning chemicals are high in volatile organic compounds (VOCs) which, when evaporated in the confines of the nacelle or hub, can cause respiratory irritation and trigger asthmatic attacks.

Alcohol: The family name of a group of organic chemical compounds composed of carbon, hydrogen, and oxygen.

Recalling the concern reflected in the outcome document of the United Nations Conference on Sustainable Development, entitled «The future we want», 1 that the health of oceans and marine biodiversity are negatively affected by marine pollution, including marine debris, especially plastic, persistent organic pollutants, heavy metals and nitrogen - based compounds, from numerous marine and land - based sources, and the commitment to take action to significantly reduce the incidence and impacts of such pollution on marine ecosystems, Noting the international action being taken to promote the sound management of chemicals throughout their life cycle and waste in ways that lead to the prevention and minimization of significant adverse effects on human health and the environment, Recalling the Manila Declaration on Furthering the Implementation of the Global Programme of Action for the Protection of the Marine Environment from Land - based Activities adopted by the Third Intergovernmental Review Meeting on the Implementation of the Global Programme of Action for the Protection of the Marine Environment from Land - based Activities, which highlighted the relevance of the Honolulu Strategy and the Honolulu Commitment and recommended the establishment of a global partnership on marine litter, Taking note of the decisions adopted by the eleventh Conference of the Parties to the Convention on Biological Diversity on addressing the impacts of marine debris on marine and coastal biodiversity, Recalling that the General Assembly declared 2014 the International Year of Small Island Developing States and that such States have identified waste management among their priorities for action, Noting with concern the serious impact which marine litter, including plastics stemming from land and sea - based sources, can have on the marine environment, marine ecosystem services, marine natural resources, fisheries, tourism and the economy, as well as the potential risks to human health; 1.

As if sweltering heat weren't bad enough, Europeans also suffered through a higher - than - normal number of days with dangerous smog levels that year.6 Smog — with ground - level ozone as the main component — forms when sunlight reacts with chemicals such as volatile organic compounds, carbon monoxide, nitrogen oxides, and water vapor.

Ozone is an odorless gas that is not directly emitted into the air but is created by chemical reactions between nitrogen oxides (NOx) and volatile organic compounds (VOC)-- which occur naturally but are also produced from the burning of fossil fuels and are released in the process of drilling for oil and natural gas.