Sentences with phrase «study by chemist»

According to a recent study by chemist Jeffrey Weidenhamer of Ashland University in Ohio, the lead in recalled children's jewelry bears a proportion of tin and copper that are «consistent with an origin from recovered solder.»

According to a study by chemist Christopher H. Hendon in the Journal of Agricultural and Food Chemistry, minerals found in tap water can greatly enhance your cup of coffee.

Not exact matches

Tom Luongo is a former research chemist by trade and an Austrian Economist by study and a market analyst by choice.

This is the attitude that says, «If it can't be studied and analyzed by chemists or physicists or biologists, it doesn't exist.»

They are the «lipid fraction» which contains the saturated fatty acids and the «non-lipid fraction» which has not been studied in - depth, says this award - winning Chemist who is the recipient of the Dr. C.L. de Silva Gold Medal Award - 2009 for «an outstanding research contribution done in any branch of Chemical Sciences during the last five years in Sri Lanka» offered by the Institute of Chemistry, Ceylon.

The study, led by Duke University chemist Heather Stapleton, found that foam samples from more than 40 percent of 102 couches bought from 1985 to 2010 contained the chemical, known as chlorinated...

Co-authored by David Catling, an atmospheric chemist at the University of Washington in Seattle, the study peers deep into our planet's history to devise a novel recipe for finding single - celled life on faraway worlds in the not - too - distant future.

Modern diesel cars emit less pollution generally than cars that run on gasoline, says a new six - nation study published today in Scientific Reports whose groundwork was laid in part by an American chemist now working at Université de Montréal.

Studies of genetic markers had already proved invaluable for evolutionary biology and forensic science, aided by chemist Kary Mullis's 1983 invention of PCR, an efficient way to amplify minute fragments of DNA.

Today is the birthday of Derek Barton, a British chemist born in 1918 who revolutionized organic chemistry by launching conformational analysis, the study of the three - dimensional structure of complex molecules.

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.

Chemists» efforts to study the inner workings of dirhodium metal complex reactions have been hindered by their extreme efficiency and speed, reacting at about 300 times per second.

The several grams produced by the new recipe is enough to supply numerous clinical trials, says study coauthor Paul Wender, a chemist at Stanford University.

In 1913 Davis and McCollum discovered a new substance in fats that was essential to life and they called it «fat - soluble A.» They distinguished it from another substance described by Dutch chemist Christiaan Eijkman, which they studied and called «water - soluble B.» The discovery of two vitamins spurred further research in nutrition.

An international collaboration of scientists led by Omar Yaghi, a chemist with the Lawrence Berkeley National Laboratory (Berkeley Lab), has developed a technique they dubbed «gas adsorption crystallography» that provides a new way to study the process by which metal - organic frameworks (MOFs)-- 3D crystals with extraordinarily large internal surface areas — are able to store immense volumes of gases such a carbon dioxide, hydrogen and methane.

The Dorothy Hodgkin fellowship, named in honour of the Nobel prizewinning British chemist, was set up following a study of women in science commissioned by the Office of Science and Technology.

The study has been conducted within the «The artificial leaf» project which is funded by Knut and Alice Wallenberg foundation to physicist, chemists, and plant science researchers at Umeå University.

Professional chemists live longer than average, according to a study carried out by the Royal Society of Chemistry.

«By working through each step so carefully, these researchers demonstrated a level of performance and efficiency that people did not think was possible at this point,» said Berkeley Lab chemist Frances Houle, JCAP deputy director for Science and Research Integration, who was not part of the study.

A Northwestern University study by an economist and a chemist reports that when fuel prices drove residents of São Paulo, Brazil, to mostly switch from ethanol to gasoline in their flexible - fuel vehicles, local ozone levels dropped 20 percent.

It's easier to imagine the spontaneous formation of the nucleotides that make up TNA than those that make up RNA itself, says chemist Leslie Orgel of the Salk Institute for Biological Studies in La Jolla, California, in part because the sugars could be easily assembled by pairing identical two - carbon fragments.

That's one result from a study performed by a chemist named Georg Steinhauser and published in the Journal Medical Hypothesis.

Prompted by those results, 2 years ago Floyd Romesberg, a chemist at the Scripps Research Institute in San Diego, California, and colleagues reported that both in vitro and animal studies showed that a gene called LexA serves as one of the key «on» switches for the error - prone DNA polymerase.

Features of this collection include the CHEM Study and Eminent Chemists Series produced by the American Chemical Society.

The study was led by scientists at the University of Hawaii at Manoa and also involved theoretical chemists at Florida International University.

Typically, evidence that disease activity is truly «on - target» with respect to the proposed mechanism can only be examined once appropriate, highly selective chemical tools have been designed, synthesized and iteratively modified by teams of Medicinal Chemists and biologists working with the studied protein.

«By understanding the fundamentals of cluster synthesis through thermochemistry, we may control and exploit these processes to create superior materials for a variety of energy - related applications,» said Dr. Grant Johnson, a PNNL physical chemist who worked on the study.

«By understanding the fundamentals of cluster synthesis, we may control and exploit them to create these superior materials,» said Dr. Grant Johnson, a physical chemist at PNNL who led the study.

«Our approach provides atom - by - atom control of the size and electron - by - electron control of the charge state of metal clusters on surfaces,» said Dr. Grant Johnson, a physical chemist involved in the study and former Linus Pauling Fellow who recently joined the Laboratory as a full - time scientist.

I'd like to think he's read our stories on such climate engineering options, including one last year in our Energy Challenge series by Bill Broad (with some help from me) in which the president of the National Academy of Sciences, the atmospheric chemist Ralph Cicerone, endorsed the need to aggressively study such options, even as the world works to limit emissions.

The importance of this distinction was made clear in a recent assessment led by atmospheric chemist Drew Shindell of NASA's Goddard Institute for Space Studies [pdf].

But seriously, I look at your use of terms like «forcing», and «feedback», and «equilibrium climate sensitivity», and «CO2 control knob», and I feel sorta like a modern redox chemist watching a bunch of biologists trying to study the cell by measuring its «phlogiston» characteristics.

«We were underestimating warming via black carbon by a factor of two,» says Patricia Quinn, an atmospheric chemist who contributed to the study.

Some of the most complete studies of carbon dioxide were conducted by Scottish chemist Joseph Black (1728 - 1799).

«Canada has already contributed to developing a significant body of work to study oil spill behaviour and recovery technologies, through extensive research conducted in the public domain by some 50 scientists, technologists, chemists and engineers in four major programs, and peer reviewed domestically and internationally.»

1950s: Research on military applications of radar and infrared radiation promotes advances in radiative transfer theory and measurements = > Radiation math — Studies conducted largely for military applications give accurate values of infrared absorption by gases = > CO2 greenhouse — Nuclear physicists and chemists develop Carbon - 14 analysis, useful for dating ancient climate changes = > Carbon dates, for detecting carbon from fossil fuels in the atmosphere, and for measuring the rate of ocean turnover = > CO2 greenhouse — Development of digital computers affects many fields including the calculation of radiation transfer in the atmosphere = > Radiation math, and makes it possible to model weather processes = > Models (GCMs)-- Geological studies of polar wandering help provoke Ewing - Donn model of ice ages = > Simple models — Improvements in infrared instrumentation (mainly for industrial processes) allow very precise measurements of atmospheric CO2 = > CO2 greeStudies conducted largely for military applications give accurate values of infrared absorption by gases = > CO2 greenhouse — Nuclear physicists and chemists develop Carbon - 14 analysis, useful for dating ancient climate changes = > Carbon dates, for detecting carbon from fossil fuels in the atmosphere, and for measuring the rate of ocean turnover = > CO2 greenhouse — Development of digital computers affects many fields including the calculation of radiation transfer in the atmosphere = > Radiation math, and makes it possible to model weather processes = > Models (GCMs)-- Geological studies of polar wandering help provoke Ewing - Donn model of ice ages = > Simple models — Improvements in infrared instrumentation (mainly for industrial processes) allow very precise measurements of atmospheric CO2 = > CO2 greestudies of polar wandering help provoke Ewing - Donn model of ice ages = > Simple models — Improvements in infrared instrumentation (mainly for industrial processes) allow very precise measurements of atmospheric CO2 = > CO2 greenhouse.

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Inspired by the 19th - century chemist Michel - Eugene Chevreul, the Delaunays studied how the perception of colours seems to change when they are placed alongside one another.