Sentences with phrase «of alkanes»

For those not in the know, canine cancer detection refers to a unique method of screening for cancer — by using the canine «olfactory» (meaning smell essentially) ability to detect tumours due to the low concentrations of alkanes and aromatic compounds they contain.

A liquid distillate of petroleum comprised of alkanes (saturated hydrocarbons) that have a chain length of between 14

Garcia - Bosch and Siegler reported their findings in the article «Copper - Catalyzed Oxidation of Alkanes with H2O2 under a Fenton - like Regime,» published in the international edition of the journal Angewandte Chemie.

This new composite material will be incorporated into the sensor array to include the detection of alkanes.

But University of Utah engineers have developed a new type of fiber material for a handheld scanner that can detect small traces of alkane fuel vapor, a valuable advancement that could be an early - warning signal for leaks in an oil pipeline, an airliner, or for locating a terrorist's explosive.

«By changing one carbon atom in the backbone of an alkane molecule, we can make it flow 30 times faster.»

Methane — An odorless flammable gas that is the main constituent of natural gas and the simplest of the alkane series of hydrocarbons.

Not exact matches

Perth - based exploration junior Alkane Exploration NL is on the point of proving up the marketability of product from its 100 per cent held Dubbo Zirconia project, located twenty kilometres south of Dubbo and 400 km north - west of Sydney.

Solvent - based paints can contain varying levels of substances that can be harmful, such as white spirit, xylene, toluene and alkanes.

Alkane hydrocarbons (propane, isobutane, and n - butane) from liquefied petroleum gas (LPG) are present in major quantities throughout Mexico City air because of leakage of the unburned gas from numerous urban sources.

In an article published today in the Proceedings of the National Academy of Sciences titled «Solar photothermochemical alkane reverse combustion,» the researchers demonstrate that the one - step conversion of carbon dioxide and water into liquid hydrocarbons and oxygen can be achieved in a photothermochemical flow reactor operating at 180 to 200 C and pressures up to 6 atmospheres.

In fact, the alkanes in these samples lasted, at best, roughly six days in the presence of microbes.

An electrical current changes the ability of modified alkanes to wet a surface, without altering their chemical identity.

Called alkane metathesis, the technique combines two catalytic reactions to cut up relatively low - value hydrocarbon chains and recombine them into chains of useful lengths.

However, a rather distinct odd - even effect of the liquid alkane dynamics was discovered.

The group has learned that the thickness of liquid alkanes can be significantly reduced, allowing for a marked increase in the substance's rate of flow.

Split alkanes then react with each other, forming a soup of very short alkanes and medium - length alkanes.

He knew he needed to find metals that were deft at breaking the carbon - hydrogen bonds that are at the heart of methane, ethane, and propane, short hydrocarbons known as alkanes, and then add in oxygen atoms that would transform the alkanes into alcohols.

When he and his colleagues at Scripps and Brigham Young University ran a methane reaction with thallium — a main group metal — alkanes pushed the solvent molecules aside 22 orders of magnitude faster than when the reaction was run with iridium, reducing the overall energy required by about one - third, they report online today in Science.

That map contains several so - called islands that are unique to A. borkumensis, such as a set of genes that allow the organism to break down the alkanes in oil and use them as food.

The team engineered engineered platform E. coli strains that are capable of producing short - chain alkanes (SCAs; i.e., gasoline); free fatty acids... Read more →

Conversion of microcrystalline cellulose to liquid alkanes with the biphasic system in function of time and temperature.

Evidence from carbon isotope records from both soil carbonates [18]--[20] and biomarkers (n - alkanes) extracted from deep - sea sediments [21] provide clear evidence of a progressive vegetation shift from C3 (∼ trees and shrubs) to C4 (∼ tropical grasses) plants during the Plio - Pleistocene.

Pharmacology: The flowers are the source of an essential oil that has a buttery consistency because it contains palmitic and other fatty acids, and alkanes The leaves and seeds contain cyanidin glycosides.

European elder flowers contain approximately 0.3 percent of an essential oil composed of free fatty acids and alkanes.

The naturally - derived ingredients used in the mix are safe for every skin type, and thanks to the addition of organic glycerin and coconut alkanes, your complexion stays hydrated all day.»

Most are made with a lot of plastic - that's how you get that silky feel - but ours uses coconut alkanes [plant derived silicones].»»

The powerpoint covers: Boiling point, Solubility and Volatility linked to hydrogen bonding of alcohols Graph drawing task to illustrate BP of alcohols vs alkanes Classifying alcohols into primary, secondary and tertiary alcohols Snap plenary task for alcohols.

The main areas covered in this work booklet are: Alkanes Alkenes Fractional distillation Cracking Polymerisation Burning Alcohols Organic acids Oil Within the booklet are a range of different activities for students to work through to help them remember the content.

Topics include: States of matter Diffusion Atomic Structure Separation Techniques Covalent Bonding Ionic Bonding Metallic Bonding Oxygen and Oxides Acids, Alkalis and Salts Rates of Reaction Equilibrium Energetics Organic Chemistry - alkanes, alkenes, alcohols, isomers, fractional distillation, cracking, polymerisation Chemistry in industry - Haber Process, Contact process, Extraction of Metals

Like Alkane Dust, they tend to appear at random on the edges of walkways or sitting under structural outrcroppings, so be sure to keep a keen eye on them.

The catalysts are derived from an environmentally benign cyanobacterium that exists naturally in the wild, and Joule has redirected the metabolism of multiple strains for the production of specific products, including ethanol and diesel - range alkanes — an industry first.

The photothermocatalytic process for the synthesis of hydrocarbons — including liquid alkanes, aromatics,... Read more →

A team of researchers in France has discovered an algal photoenzyme that catalyzes the decarboxylation of free fatty acids to n - alkanes or - alkenes in response to blue light.

PEER - REVIEW STUDY ScienceDirect.com — Reconstructing tropical cyclone frequency using hydrogen isotope ratios of sedimentary n - alkanes in northern Queensland, Australia

The photothermocatalytic process for the synthesis of hydrocarbons — including liquid alkanes, aromatics, and oxygenates, with carbon numbers (Cn) up to C13 — ran in a flow photoreactor operating at elevated temperatures (180 — 200 °C) and pressures (1 — 6 bar) using a 5 % cobalt on TiO2 catalyst and under UV irradiation.