Sentences with phrase «aldehydes in»

Optimized selective aerobic oxidations in ionic liquids convert various activated primary alcohols into their corresponding acids or aldehydes in good to excellent yields.

«We wanted to see if there was a difference in the lignin - hemicellulose network if you substituted water - resisting aldehydes in the lignin for water - attracting alcohols,» said Loukas Petridis, an ORNL staff scientist.

Not exact matches

To get around that problem, a group at the Department of Energy's Ames Laboratory in Iowa, led by Vitalij Pecharsky — a materials scientist with a joint appointment at Iowa State University, Ames — started with powdery organic compounds, such as phosphonium salts, solid aldehydes or ketones, and anhydrous potassium carbonate.

In the 3 March issue of Science, researchers report a way to clean up a commonplace family of chemical reactions — turning alcohols into aldehydes, ketones, and carboxylic acids, starting materials for everything from pharmaceuticals to fragrances.

Thermolysis of the applied tosyl hydrazones (easily prepared by condensation of the corresponding aldehydes with tosyl hydrazine) leads to in situ formation of the corresponding diazo compounds.

Steve: This is really interesting material, I think, because perhaps many of the listeners are familiar with older research, for example, that found that the aldehyde dehydrogenase enzyme is not available for certain people, and that for them, drinking in excess is really uncomfortable, so they tend not to, but that's more of a direct genetic biochemical kind of a system related to the alcohol molecule ultimately as it gets metabolized.

The aldehyde, which gives blood in meat its faintly metallic odour, forms when animal fat breaks down, and Laska believes it is likely to be present in all mammal blood.

Even at very low concentrations, they report in today's Nature, the aldehydes inhibited hatching of copepod eggs.

Using a molecular dynamics code called NAMD, the team ran simulations of the wild lignin and the genetically modified lignin in a water cube, modeling the presence of the aldehydes by altering the partial charges of the oxygen and hydrogen atoms on the modified lignin's allylic site.

Back in the laboratory, the group isolated three compounds called aldehydes produced by the diatoms.

They are based on novel sensor arrays that detect and differentiate among a diverse range of aldehydes and ketones, as reported in the journal Angewandte Chemie.

Most of the 140 types of molecules found in space have been discovered here, including some common on Earth: acetic acid (vinegar), ethylene glycol (the chief ingredient in antifreeze), and a basic sugar known as glycol aldehyde.

Her efforts allowed her to discover that single - cell plants that were exposed to aldehydes did end up with less chlorophyll — the green pigment in plants that absorbs light and plays a key role in photosynthesis.

It's a vicious circle but one that has enabled a multinational team of researchers to identify the odours as organic hydrocarbons in the form of three aldehydes, heptanal, octanal and nonanal, whose discovery could bring relief to a disease that claimed nearly half a million lives in 2016.

«This report provides evidence for the relevance of ALDH inhibition in Parkinson's disease pathogenesis, identifies pesticides that should be avoided to reduce the risk of developing Parkinson's disease and suggests that therapies modulating ALDH enzyme activity or otherwise eliminating toxic aldehydes should be developed and tested to potentially reduce Parkinson's disease occurrence or slow its progression particularly for patients exposed to pesticides,» the study states.

On average, all four carnivore species played with the aldehyde - laced blocks just as much as with the blood - laced blocks, the team reports today in PLOS ONE.

The molecule — a so - called aldehyde — carries the telltale metallic stench of blood and is found in pigs» blood and perhaps in all mammalian blood, Laska says.

The oligonucleotides, suspended in 1.5 M betaine in 3X SSC buffer at a concentration of 500 ng / µl, were covalently linked in quadruplicate to aldehyde - coated glass microscope slides at a spacing of 250 microns.

In the GBT experiment, three aldehyde molecules were observed and appear to be related by simple hydrogen addition reactions, which probably occur on the surface of interstellar grains.

In both vaping and smoking, he notes, it appears that toxic aldehydes are contributors.

In the new study, postdoc Stephan C. Hammer, now at the University of Stuttgart, found that the enzyme actually made 45 % aldehyde directly, without going through an epoxide intermediate.

Chemists have long wanted to find better ways to achieve anti-Markovnikov selectivity in alkene oxidations — for example, to convert the aldehyde products to linear alcohols, which are commonly used in flavorings, perfumes, lubricants, and cosmetics.

A snow pack source of aldehydes and acetone in West Antarctica between 76 and 90 degrees S. EGU General Assembly 2009, held 19 - 24 April, 2009 in Vienna, Austria, p. 12645.

Responsible substances for these effects are cinnamaldehyde, tannin, mannitol, coumarins and the essential oils known as aldehydes, eugenol and pinene found in cinnamon.

SPI (soy protein isolate — the ingredient you most often find in veggie burgers, energy bars and other modern products — contains some 38 petroleum compounds including, but not limited to: butyl, methyl and ethyl esters of fatty acids, phenols, diphenyls and phenl esters, abietic acid derivatives, diehydroabietinal, hexanal and 2 - butyl -2-octenal aldehydes; dehydroabietic acid methyl ester; dehydroabietene and abietatriene.

Adding insult to injury: In women, the enzyme aldehyde dehydrogenase (ALDH)-- which breaks down alcohol in the stomach — can work less efficiently than in men, says Scott Walters, PhD, associate professor at the University of Texas School of Public HealtIn women, the enzyme aldehyde dehydrogenase (ALDH)-- which breaks down alcohol in the stomach — can work less efficiently than in men, says Scott Walters, PhD, associate professor at the University of Texas School of Public Healtin the stomach — can work less efficiently than in men, says Scott Walters, PhD, associate professor at the University of Texas School of Public Healtin men, says Scott Walters, PhD, associate professor at the University of Texas School of Public Health.

Some of these aldehydes are converted to glucose, but a large amount of excess citrate is formed in the process, stimulating «junk chemicals» that result in free fatty acids (FFAs), VLDL and triglycerides.

In this post, I will address the question of whether we should avoid kombucha and other fermented foods because their content of chemicals known as aldehydes makes them toxic.

When energy metabolism becomes dysfunctional, when we have deficiencies in the nutrients needed to support these pathways, or when we have genetic predispositions to tolerate certain dietary factors poorly, the aldehydes may accumulate instead of being quickly metabolized to other safer molecules.

Aldehydes can be converted into acetic acid a harmless compound in the presence of nutrients such as glutamine, selenium, niacin folic acid, B6, B12, iron and molybdenum.

You are exposed to aldehydes every time you smell perfume or cologne, and smell the wonderful fragrances when you walk down the detergent aisle in the grocery store.

In addition, those who have a faulty BRCA2 gene are already more susceptible to cancer, and exposure to aldehydes only exacerbates the issue.

In animals, even low levels of cyclic aldehydes oxidize LDL cholesterol and cause high levels of inflammation associated with heart disease.

Cyclic aldehydes have also been shown to cause toxic shock in animals through gastric damage, which is consistent with the rise in immune problems and gastrointestinal - related diseases in the human population.

The interesting thing about the GI index is that some foods that are relatively high are fine for diabetics whereas one of the lowest glycemic food... fructose in concentrated form is not helpful due to the metabolic products formed by the liver... uric acid, inflammatory aldehydes, lipids and some glycogen.

These include the flavin monooxygenases (FMOs are responsible for detoxifying nicotine from cigarette smoke); alcohol and aldehyde dehydrogenases (metabolize alcohol), and monamine oxidases (MAOs break down serotonin, dopamine, and epinephrine in neurons).

Fructose is metabolized almost exclusively in the liver to a variety of substances most of which are not good for us (e.g. uric acid, fats such as triglycerides, inflammatory aldehydes).

Fermenting gets rid of the phytates, however cooking is best in our experience, because ferments have a number of problems including but not limited to yin qualities of the food and toxic Aldehydes.

These three additional treatments guarantee that the polyunsaturated fatty acid molecules will be oxidized in ways that generate toxins like 4 - hydroxyhexanal, 4 - hydroxynonanol, aldehydes and more.

One of the reasons yeast overgrowth can result in acne, rashes, and feeling poorly overall is that the aldehydes, the toxic by - products produced by the yeast, overwhelm your detox system.

The danger with cinnamon in other supplements are the presence of naturally occurring, toxic fat - soluble compounds known as aldehydes.

In fact, read my answer to see that some emissions (aldehydes) are actually worse for ethanol.

contain known active ingredients, including phenols, aldehydes, terpenes, and oxides, and carvacrol, which have a direct effect in raising the body's electrical frequencies.

In addition, a detailed oxidation mechanism for OSCs was added to the model (SI Appendix, sections 1 and 3), including reactions of the CH3S (O)(O) O • radical with HCHO and larger aldehydes.

The aldehyde intermediate is the primary reason that ethanol will always result in higher final ozone levels.