Last April Swedish scientists discovered high levels of a potentially cancer-causing chemical called acrylamide in wide range of starch-containing foods that are fried or baked, particularly french fries, potato chips and crackers. The announcement received worldwide publicity. But at the time, no one knew where the acrylamide came from, how it was formed, or, indeed, if there is a link between acrylamide in food and cancer. The findings were quickly confirmed by the British Food Standards Agency. Earlier this autumn the source of the acrylamide was identified independently by researchers at the University of Reading in England, Nestlé in Switzerland and Procter & Gamble in the United States. They showed that acrylamide is produced when asparagine, an amino acid abundant in cereals and grains, is heated above 100 degrees Centigrade (212 degrees Fahrenheit) with either of two sugars, glucose or 2-deoxyglucose.
Now Bruce Ganem, a professor in Cornell Universitys Department of Chemistry and Chemical Biology, has offered a more-detailed chemical explanation about how acrylamide is produced when starch-containing foods are fried or cooked at high temperatures. His theory is proposed in a letter, "Explaining acrylamides in food," in a recent issue of the journal Chemical and Engineering News (Dec. 2, 2002).
Acrylamide is a polymer that is widely used in the treatment of drinking water. It also is used in the manufacture of plastics. It was first evaluated as probably carcinogenic to humans in 1994 by the International Agency for Research on Cancer. But it was not known to occur in high levels in fried or baked foods before this years Swedish study.
Blaine P. Friedlander Jr. | Cornell News
In depression the brain region for stress control is larger
20.09.2018 | Max-Planck-Institut für Kognitions- und Neurowissenschaften
Interfacial engineering core@shell nanoparticles for active and selective direct H2O2 generation
19.09.2018 | Science China Press
The building blocks of matter in our universe were formed in the first 10 microseconds of its existence, according to the currently accepted scientific picture. After the Big Bang about 13.7 billion years ago, matter consisted mainly of quarks and gluons, two types of elementary particles whose interactions are governed by quantum chromodynamics (QCD), the theory of strong interaction. In the early universe, these particles moved (nearly) freely in a quark-gluon plasma.
This is a joint press release of University Muenster and Heidelberg as well as the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt.
Then, in a phase transition, they combined and formed hadrons, among them the building blocks of atomic nuclei, protons and neutrons. In the current issue of...
Thin-film solar cells made of crystalline silicon are inexpensive and achieve efficiencies of a good 14 percent. However, they could do even better if their shiny surfaces reflected less light. A team led by Prof. Christiane Becker from the Helmholtz-Zentrum Berlin (HZB) has now patented a sophisticated new solution to this problem.
"It is not enough simply to bring more light into the cell," says Christiane Becker. Such surface structures can even ultimately reduce the efficiency by...
A study in the journal Bulletin of Marine Science describes a new, blood-red species of octocoral found in Panama. The species in the genus Thesea was discovered in the threatened low-light reef environment on Hannibal Bank, 60 kilometers off mainland Pacific Panama, by researchers at the Smithsonian Tropical Research Institute in Panama (STRI) and the Centro de Investigación en Ciencias del Mar y Limnología (CIMAR) at the University of Costa Rica.
Scientists established the new species, Thesea dalioi, by comparing its physical traits, such as branch thickness and the bright red colony color, with the...
Scientists have succeeded in observing the first long-distance transfer of information in a magnetic group of materials known as antiferromagnets.
An international team of researchers has mapped Nemo's genome, providing the research community with an invaluable resource to decode the response of fish to...
03.09.2018 | Event News
27.08.2018 | Event News
17.08.2018 | Event News
20.09.2018 | Earth Sciences
20.09.2018 | Earth Sciences
20.09.2018 | Physics and Astronomy