Sentences with phrase «reaction mechanism in»

About 10 years ago, chemists discovered a novel reaction mechanism in dissociation reactions of gas - phase molecules, called roaming.

«Clairol — when I was looking for a job, which was in the early 1970s — were starting to do some work in reaction mechanisms in permanent hair dyes.»

Elucidation of these processes will further our understanding of solvation and reactions in multi-phase, multi-component solutions and in determining reaction mechanisms in heterogeneous systems.

Not exact matches

I think that kind of reaction is a defense mechanism... that people that hate on others beliefs only do so because they lack confidence in their own beliefs... and have to put others down to feel better about themselves.

However, while it is useful as a heuristic in developing models of reaction mechanisms, it has been shown to fail as a criterion for selecting among some selected published models.

If it is true, as I suggest, that salvation lies in the direction of an Earth organically in-folded upon itself, it is then surely evident that, though a reciprocal mechanism of action and reaction, the vision and prevision of this ultimate end, this outcome of History and of Life, may be made to play an essential part in the building of the future, if only by creating the atmosphere, the psychic field of attraction, without which it will be impossible for Humanity to continue to converge upon itself.

The detailed sequence of elementary steps (about twenty) which must be involved in the B - Z reaction has been worked out by Richard Noyes.11 This mechanism (called «the Oregonator» in honor of the location of Noyes's laboratory) is well understood and involves nothing but ordinary chemistry, but it is too involved to discuss here.

Their fight or flight mechanisms, and one might add their «fright» reactions, which we now know are built into their very DNA, do indeed seem to imply that a certain degree and type of suffering seems also to be built in.

However, memorizing chemical equations and reaction mechanisms for my midterm took much more time than I anticipated, so my pumpkin sat plain and faceless in the entryway.

ReactIR, Particle Track and Particle Vision enable understanding of reaction progression, mechanisms, kinetics, and particle characterisation in situ and in real - time for batch and flow chemistry in lab and plant environments.

This week the State legislature passed and the governor signed into law a far - reaching set of prohibitions, restrictions, and tracking mechanisms regarding guns, making New York the first state to change its policies in reaction to the Sandy Hook school shootings.

«The radical - pair mechanism of magnetoreception is still just a hypothesis, and arguably the best evidence we have for it so far is the effect of time - dependent radiofrequency magnetic fields on the ability of migratory birds to detect the direction of the Earth's magnetic field,» says senior author Peter Hore, an Oxford biophysical chemist specializing in magnetic influences on chemical reactions.

In the remaining years of the 20th century, there is no doubt that the experimental investigation of the dynamics and mechanisms of elementary chemical reactions will play a very important role in bridging the gap between the basic laws of mechanics and the real world of chemistrIn the remaining years of the 20th century, there is no doubt that the experimental investigation of the dynamics and mechanisms of elementary chemical reactions will play a very important role in bridging the gap between the basic laws of mechanics and the real world of chemistrin bridging the gap between the basic laws of mechanics and the real world of chemistry.

The advance in modern microscopic experimental methods, especially crossed molecular beams and laser technology, has made it possible to explore the dynamics and mechanisms of important elementary chemical reactions in great detail.

«My training is in reaction mechanisms,» explains Keith Brown, who earned a Ph.D. in organic chemistry from the University of Liverpool and has been working at Clairol for 28 years.

In particular, I got to study how ultrahigh - vacuum techniques could shed light on kinetic, structural, and electronic mechanisms that govern a catalytic reaction.

The ORNL - led study instead provides evidence for the second mechanism, in which one H atom associates with an O atom to make OH and the other H associates with cerium (Ce) to make CeH — a hydride that may serve as a source of H for industrially important hydrogenation reactions.

«The question now is how can people in chemistry create new reactions, new mechanisms to use carbon dioxide as a feedstock?»

They're the same symptoms you see in septic shock and other types of severe inflammatory reaction, an over-exuberant response from our own protective mechanisms.

Intrigued by the molecular details of how enzymes worked, he next joined the lab of Michael Toney, where he set out to understand how electrons and protons move during catalysis by analyzing how mutations in the enzyme's functional site affected the reaction mechanism.

More specifically, it illustrates that third - person judgment situations, such as those used in their study, may rely on similar neural mechanisms as two - person economic and social exchanges, and highlights rDLPFC as a candidate for the neural suppression of impulsive reactions in these situations.

Chauvin cracked the case in 1971, and his mechanism revealed that the metathesis reaction had the potential to be used for a wide range of reactions, such as turning linear compounds into rings, stitching linear chains together, and breaking rings open.

To explore the mechanism of this reaction, we screened for nucleotides in Escherichia coli 23S rRNA that may have a perturbed pK a (whereK a is the acid constant) based on the pH dependence of dimethylsulfate modification.

The fact that a rather benign mechanical mechanism such as a propagating sound field can produce atomic reactions is a quite remarkable and has attracted considerable scientific attention (see «The Chemical Effects of Ultrasound,» by Kenneth S. Suslick in Scientific American, Vol.

«In our sensor mechanism, we use the same chemistry and enzymatic reaction that are incorporated into blood glucose testing strips,» Prasad said.

In order to create less expensive electrocatalysts that work well in an alkaline environment, researchers have to know exactly how the reaction unfolds, and what its most essential mechanisms arIn order to create less expensive electrocatalysts that work well in an alkaline environment, researchers have to know exactly how the reaction unfolds, and what its most essential mechanisms arin an alkaline environment, researchers have to know exactly how the reaction unfolds, and what its most essential mechanisms are.

A paper by Yan's research group, published in the Jan. 8 issue of the multidisciplinary journal Nature Communications, helps pin down the basic mechanisms of the fuel - cell reaction on platinum, which will help researchers create alternative electrocatalysts.

Such external pressure comes inter alia from lawmakers and consumer organizations in different countries, legal mechanisms and institutions in different countries that effectively require legal compliance, as well as market reactions to problematic software license agreements.

The main implication of the work is the understanding of the mechanisms underlying the formation of biological three - dimensional nano - patterns, demonstrating the first example of Turing reaction - diffusion model acting in the bio-nanoworld.

«This «famine reaction», a survival mechanism which helped humans to survive as a species when food supply was inconsistent in millennia past, is now contributing to our growing waistlines when the food supply is readily available.»

More specifically, in recent decades more than a thousand publications have appeared using this term, including publications in the journal Reaction Kinetics, Mechanisms and Catalysis for which Lente is the Managing Editor (6, 7).

With a deep understanding of the mechanisms of electrode reactions in DMFCs, the researchers designed and produced noble metal - based heterogeneous electrocatalysts with enhanced catalytic activity and high selectivity for MOR and ORR.

This shows the reaction mechanism for converting hydrogen fluoride (HF) impurity from the electrolyte into lithium fluoride (LiF) in the solid - electrolyte interphase (SEI) with release of hydrogen gas (H2).

The reaction mechanism is described by the team around Timo Wendling and Prof Dr Lukas Goossen together with a colleague of the Technical University of Kaiserslautern in the journal Chemistry — A European Journal.

During his years as an assistant professor of chemistry at University of Maryland, Baltimore County, Dietze asked fundamental questions about mechanisms of basic organic chemical reactions, questions he recounted in a recent telephone interview: «How does A go to B?

One of the researchers got to take advantage of his Russian skill since some of the chemistry details necessary for understanding the reaction mechanism was only available in an old Russian PhD thesis.

It was in fact believed that ribozymes resembled the functioning of protein enzymes, but that is not case: the latter in fact use far more specific methods due to the chemical richness of amino acids, whereas the process in ribozymes adapts to the skeleton of the RNA that forms them, resulting in a slightly slower but equally precise reaction mechanism.»

After deciphering the crystal structure of the catalytic domain of PHA synthase, in addition to other structural studies on whole enzyme and related proteins, the research team also performed experiments to elucidate the mechanisms of the enzyme reaction, validating detailed structures, enzyme engineering, and also N - terminal domain studies among others.

«Also, the new mechanism may shed light on broader problems» in chemistry, he said, by providing a deeper understanding fundamental reaction processes for gold and other catalysts.

The research team found a new mechanism explaining how this reaction can occur in just tens of femtoseconds (quadrillionths of a second), before other competing effects can steal away their energy.

In addition, the study investigated whether Hyssopus officinalis L. was able to increase immune reactions and thus, may be used to improve and perfect the mechanisms underlying the treatment of asthma.

We are currently studying the mechanisms by which telomeres are recruited to these structures and how recombination reactions, which are normally suppressed at telomeres, are allowed in the ALT context.

Scientists at Helmholtz Zentrum München have discovered a mechanism that amplifies the autoimmune reaction in an early stage of pancreatic islet autoimmunity prior to the progression to clinical type 1 diabetes.

«We're interested in the mechanism of the chemical reaction, with the goal of controlling and steering it in a certain direction with light,» Schmidt said.

Though this program was very accurate in describing the shape of large molecules, it was blind to the quantum mechanisms that drive chemical reactions.

Kaiser noted that physical chemists, on the other hand, can help shine a light on reaction mechanisms that can lead to the synthesis of specific molecules in space.

To cite a few instances, polymerase chain reaction (PCR), a molecular method developed over three decades ago, has been widely applied in disease diagnosis, disease mechanism deciphering, and prognosis prediction; the elucidation of tyrosine kinase activity in cancer cells has led to the development of novel drugs for cancer treatment; and the identification of proteins and genetic molecules by molecular methods as biomarkers for disease diagnosis and prognosis has been drawing great interest.

Dayne F. Swearer, at Rice University, combines two reactive functions in one aluminum nanoparticle to unlock new catalytic mechanisms for known reactions.

Kinetics and mechanisms of surface chemical reactions important in heterogeneous catalysis

Dr. Peden is best known as a leader in the development of the mechanisms of automobile exhaust catalytic reactions.