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Glycerol Derivatives of Cutin and Suberin Monomers: Synthesis and Self-Assembly
Glycerol derivatives of cutin and suberin monomers were synthesized by acid catalysis. Their dispersion in an aqueous solution was examined by phase contrast microscopy, neutron scattering, and solid state NMR. It is shown that the phase behavior strongly depends on the nature of the derivatives forming either lumps of aggregated...
Parameterization of Reversible Digitally Filtered Molecular Dynamics Simulations
Reversible Digitally Filtered Molecular Dynamics RDFMD is a method of amplifying or suppressing motions in a molecular dynamics simulation, through the application of a digital filter to the simulation velocities. RDFMD and its derivatives have been previously used to promote conformational motions in liquid-phase butane, the Syrian hamster prion protein,...
Preparation of C-6 Substituted Chitin Derivatives Under Homogeneous Conditions
Tosylation of chitin under homogeneous conditions was achieved by the reaction of tosyl chloride with chitin in a DMAc/LiCl solvent system. The resultant tosyl-chitin was fully N-acetylated with acetic anhydride in methanol. The fully acetylated tosyl-chitin was subsequently reacted with the sodium salts of ethyl p-hydroxybenzoate, diethyl malonate, and diethyl...
Parallel Solution-Phase Synthesis of 4-Dialkylamino-2-methylsulfonyl-6-vinylpyrimidines
A simple and straightforward methodology for the parallel, solution-phase synthesis of novel 4-dialkylamino-2-methylsulfonyl-6-vinylpyrimidines 9a-j has been developed. Starting from 2-methylthio-6-[2-ptoluensulfonyloxy ethan-1-yl]-4(3H)-pyrimidinone (6), a three-step procedure (namely, tosylate substitution by amines, base-catalyzed rearrangement, and sulfide to sulfone oxidation) using a Bu¨chi Sincore synthesizer gave the final products in high yield after...
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Letters to the Editor
Supply, demand Re: "As chemists gather, let's refocus efforts to gain diversity in science," Tuesday: Catherine T. Hunt, past president of the American Chemical Society, plays a familiar refrain. Her message is that we need more students especially women and minority students to take up science, technology, engineering, and mathematics...
Albemarle Scientists Named 'Heroes of Chemistry'
BATON ROUGE, La., Aug. 21 /PRNewswire-FirstCall/ -- Twelve scientists from specialty chemical maker Albemarle Corporation and ExxonMobil Research and Engineering Company were honored by the American Chemical Society ACS in a special ceremony Sunday night as "Heroes of Chemistry" for their work in the development of NEBULAR...
Spoonful of Sugar Really Might Help Medicine Go Down
If your child won't take medicine and shuns broccoli at the dinner table, his body may just be hard-wired to respond that way. "Kids reject the bad taste of medicine, because it's basic biology. Their system is designed to reject that taste, because many toxic substances are bitter and distasteful,"...
Calcium Might Have Taste Humans Can Detect
It may be time to add calcium to the types of tastes -- sweet, sour, salty, bitter and savory -- that can be detected by humans, according to U.S. researchers. They found that a taste for calcium exists in mice. Since mice and humans share many of the same genes,...
Modified MRI Spots Early Osteoarthritis
A modified form of MRI may help diagnosis osteoarthritis at an early stage when it may be possible to prevent or reduce permanent joint damage, say U.S. researchers. Current diagnostic methods don't detect osteoarthritis until it's in advanced stages. In this new approach, MRI is used to determine the concentration...
Scientists identify chemical odor of skin cancer: study
WASHINGTON AFP — US chemists have identified the odor that emanates from skin cancer, a development that researchers hope will advance diagnosis and treatment of the deadly disease, said a study out Wednesday. The creation of a "profile" of the chemical odors linked to skin cancer, may lead...
New, potentially damaging, pollutant is discovered
A previously unknown class of pollutants, formed in combustion ranging from cigarettes to power plants and diesel engines, was announced at the American Chemical Society's national meeting. Whether they are harmful to human health is unknown, although the chemist who discovered the particles said their existence might help explain why...
More Juices Found to Affect Drugs' Effectiveness: Study
Grapefruit juice, long known to boost the absorption of certain medications, isn't the only juice that doesn't mix well with drugs, according to the Canadian researcher who first identified the ill effects of grapefruit juice. Other common juices, including orange and apple, may limit the body's absorption of drugs, compromising...
The Merck Index Women in Chemistry Scholarships to be Presented at American Chemical Society National Meeting
WHITEHOUSE STATION, N.J. -- Merck & Co. Inc. today announced the winners of the second annual Merck Index Women in Chemistry Scholarship program. The program is designed to foster support for women choosing to pursue advanced degrees in medicinal or synthetic organic chemistry. "We are pleased to be...
A Hope: Contaminant-Free Synthetic Heparin
Robert J. Linhardt is a chemist with a dream: making the blood-thinner heparin by the bucketful without using animal tissue. pig intestines processed in China. That processing often is done in small mom-and-pop workshops, a situation conducive to contamination, said Linhardt, a professor of chemistry, biology and chemical engineering at...
DNA, Jim, but not as we know it: unnatural genetic letters build stronger double helix
If aliens have DNA, it might look something like this. Chemists have synthesized a DNA-like molecule using unnatural versions of the A, T, C and G "letters" that make up the genetic code. The resulting molecule has greater structural stability than natural DNA and would resist breakdown by...
New Realities in Corporate PR
Caution - smoke filled rooms may be dangerous to your corporate health and wealth. So may even rooms that are entirely smoke-free, after the coming elections, if the rooms are occupied by legislators and aides deciding what government should do to make good on campaign promises. Two...
DSM Performance Materials Award 2008 presented to Professor Craig J. Hawker
Craig J. Hawker, Professor of Chemistry, Biochemistry and Materialsand Director of the Materials Research Laboratory at the Universityof California, Santa Barbara, USA, has been awarded the DSMPerformance Materials Award 2008 in recognition of his exceptionalcontributions to the advancement of the materials sciences. ProfessorHawker is one of the world's...
"Global Challenges/Chemistry Solutions" Debuts With Focus on Drinking Water
An authority on the quality of drinkingwater today describes new challenges for consumers and municipal watersupply systems, including unexpected consequences of efforts to conservewater, in the first of a special series of podcasts from the AmericanChemical Society ACS, the world's largest scientific society. Marc Edwards, Ph.D., notes that...
Pro-Pharmaceuticals' Executives Contribute to Definitive Book on Galectins
Pro-Pharmaceuticals' DAVANAT([R]) Targets Galectin Receptors on Cancer Cells NEWTON, Mass. -- Pro-Pharmaceuticals, Inc. (Amex: PRW), a Company developing proprietary carbohydrate-based therapeutic compounds to treat cancer and fibrosis, today announced two of its executives and a member of its Scientific Advisory Board edited a new book...
Spectrum Pharmaceuticals' Board of Directors Re-Elected at Annual Stockholders Meeting
IRVINE, Calif. -- Spectrum Pharmaceuticals, Inc. (NasdaqGM:SPPI) announced today that shareholders re-elected all six of the Company's nominees to the Board of Directors, with more than 88 percent of votes cast, at the Annual Meeting of Stockholders held on Friday, June 20, 2008 at the Company's global...
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Professional Organizations: 813920
