chemical reactions – Shamskm: A site to exchange knowledge and solutions

Volcanic Aerosols, not Pollutants, Tamped down Recent Earth Warming, Says CU Study

By Guest PostMarch 3, 2013Environmentasia, atmosphere, boulder, brian toon, change, chemical reactions, China, climate, climate change trends, climate variability, coal burning activities, coal burning pollution, community climate model, cooling the planet, david hoffman, earth, emissions, global volcanic eruptions, greenhouse effect, India, industrial sulfur dioxide, jean paul vernier, jeffrey thayer, noaa, reflect, role of volcanoes, ryan neely, Space, stratospheric aerosol layer, sulfur dioxide, sulfuric acid, sunlight, susan solomon, university of colorado, version 3, volcanoe, waccm, warming on earth, water particles

A team led by the University of Colorado Boulder looking for clues about why Earth did not warm as much as scientists expected between 2000 and 2010 now thinks the culprits are hiding in plain sight — dozens of volcanoes spewing sulfur dioxide.

The study results essentially exonerate Asia, including India and China, two countries that are estimated to have increased their industrial sulfur dioxide emissions by about 60 percent from 2000 to 2010 through coal burning, said lead study author Ryan Neely, who led the research as part of his CU-Boulder doctoral thesis. Small amounts of sulfur dioxide emissions from Earth’s surface eventually rise 12 to 20 miles into the stratospheric aerosol layer of the atmosphere, where chemical reactions create sulfuric acid and water particles that reflect sunlight back to space, cooling the planet. (more…)

Stay Cool and Live Longer?

By Guest PostFebruary 24, 2013Healthbi zhang, calcium, cells, chemical reactions, cold blooded animals, cold environments, daf 16, fat cells, fat tissue, fish, flies, foxo, gene, genetic program, humans, jianke gong, live longer, longevity in mammals, longevity of roundworms, nematodes, nerve, passive thermodynamic process, pharmacological stimulation, rate, rate of aging, receptor, rui xiao, shawn xu, spicy condiment wasabi, stay cool, temperature response, trpa1 channel, university of michigan, warm blooded lanimals, worms, yongming dong

ANN ARBOR — Scientists have known for nearly a century that cold-blooded animals, such as worms, flies and fish all live longer in cold environments, but have not known exactly why.

Researchers at the University of Michigan Life Sciences Institute have identified a genetic program that promotes longevity of roundworms in cold environments—and this genetic program also exists in warm-blooded animals, including humans. (more…)

Studying The Evolution of Life’s Building Blocks

By Guest PostFebruary 20, 2012Sciencealbert szent gyorgyi, ancient life, bacterium, basic module, beginning of life, beginning of time, british columbia, building block, chemical building block, chemical reactions, evolution, evolution of life, geneticists, michigan state university, molecular complementarity, molecular paleontology, origin of life, paleontologists, physiologist, robert root bernstein, species, vancouver, vitamin c

VANCOUVER, British Columbia — Studying the origin of life at its building blocks offers a unique perspective on evolution, says a researcher at Michigan State University.

Robert Root-Bernstein, MSU physiology professor, will answer the question of why a physiologist studies the origin of life at the annual meeting of the American Association for the Advancement of Science Feb. 16-20 in Vancouver, British Columbia. (more…)

Andrew Artenstein: Essential Enzymes Key to Disease, Maybe Treatments

By Guest PostJanuary 2, 2012Healthalzheimer, andrew artenstein, anthrax, athlerosclerosis, bacteria and viruses, biodefense, body, cancer, chemical reactions, david orenstein, disease, ebola, enzymes, essential proteins, Europe, flu, iaips, infectious diseases, inter alpha inhibitor proteins, measles, microscopic level, molecules, natural human proteins, outbreak of h1n1, pathways, pcs, proprotein convertases, proteins, sars, steven opal, therapies, viruses

*Proprotein convertases are enzymes that activate many essential proteins, but they are also implicated in many processes that cause disease. In a research review in the New England Journal of Medicine, Andrew Artenstein and Steven Opal argue that proprotein convertases are potentially rich targets for developing therapies.*

Most people have never heard of proprotein convertases, but the enzymes activate many proteins that are essential for life. Unfortunately, their fundamental role puts them in the middle of many processes that cause disease – not just cancer or athlerosclerosis, but both of those and Alzheimer’s and anthrax and the flu and an amazing variety of other maladies.

In a research review article appearing Dec. 29 in the New England Journal of Medicine, Andrew Artenstein, physician-in-chief in the Department of Medicine at Memorial Hospital, and Steven Opal, chief of infectious diseases at Memorial Hospital, argue that proprotein convertases (PCs) are potentially rich targets for developing therapies. Artenstein, who with Opal is on the faculty of the Warren Alpert School of Medicine, explained PCs to David Orenstein. (more…)

MSU Chemists Become The First To Support an 84-Year-Old Theory

By Guest PostDecember 23, 2011Scienceabsorption of light, astronomers, chemical reaction pathways, chemical reactions, chromium, cobalt, conservation of angular momentum, distant planets, dong guo, energy, fluorescence resonance energy transfer, fret, fundamental property, hypothesis, jim mccusker, michigan state university, molecules, Nature, principle, properties, satellites, skaters, spin, troy knight

EAST LANSING, Mich. — The same principle that causes figure skaters to spin faster as they draw their arms into their bodies has now been used by Michigan State University researchers to understand how molecules move energy around following the absorption of light.

Conservation of angular momentum is a fundamental property of nature, one that astronomers use to detect the presence of satellites circling distant planets. In 1927, it was proposed that this principle should apply to chemical reactions, but a clear demonstration has never been achieved. (more…)

Study Improves Understanding of Method for Creating Multi-Metal Nanoparticles

By Guest PostDecember 18, 2010Sciencealloy nanoparticles, atoms, chemical reactions, core, digestive ripening, electric field of light, environmental applications, gold, gold core, gold silver alloy, industrial, joe tracy, multi component metal nanoparticles, nanoparticles, optical properties, security technology, shell nanoparticles, silver, silver shell, single metal nanoparticles, synthesis, technique, tunable properties, two metals

A new study from researchers at North Carolina State University sheds light on how a technique that is commonly used for making single-metal nanoparticles can be extended to create nanoparticles consisting of two metals – and that have tunable properties. The study also provides insight into the optical properties of some of these nanoparticles.

Tuning the optical properties of nanoparticles is of interest for applications such as security technology, and for use in making chemical reactions more efficient – which has multiple industrial and environmental applications. (more…)

Fixing Wiki: Wikipedia Revision Project Teaches Teamwork, Communication, Chemistry

By Guest PostAugust 27, 20102 commentsEducation, Technologyanne gere, anne mcneil's courses, arthur f.ttturnau, brian coppola, chemical reactions, chemistry courses, department of english language and literature, electroactive polymers, famous chemists, halogen bonding, handbook, hyperconjugation, locke, macromolecular science and engineering, medicinal chemistry, mich, online encyclopedia, peer review, physical organic chemistry, rod dunican, san francisco, school of education, sweetland writing center, university of michigan, Wikipedia, writing and rhetoric

ANN ARBOR, Mich.— Halogen bonding, hyperconjugation, electroactive polymers—such subjects are typical fare in graduate-level chemistry courses. But how many classes challenge students to explain the concepts to the whole world?

(more…)

Tag Archives: chemical reactions