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On the Road to Plasmonics with Silver Polyhedral Nanocrystals

By Guest PostNovember 26, 2011Scienceasaph widmer cooper, beam of light, berkeley lab, cuboctahedra, exotic superlattices, helical motifs, joel henzie, michael grünwald, microscopes, nanophotonics, nanoscale objects, octahedral, peidong yang, phenomenon, phillip geissler, photocatalysis, plasmonics, polyhedral nanocrystals, polyol synthesis technique, silver, silver nanocrystals, silver polyhedral crystals, supercrystals

*Berkeley Lab Researchers Find Simpler Approach to Making Plasmonic Materials*

The question of how many polyhedral nanocrystals of silver can be packed into millimeter-sized supercrystals may not be burning on many lips but the answer holds importance for one of today’s hottest new high-tech fields – plasmonics! Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) may have opened the door to a simpler approach for the fabrication of plasmonic materials by inducing polyhedral-shaped silver nanocrystals to self-assemble into three-dimensional supercrystals of the highest possible density. (more…)

Yale Researchers Find Genetic Link Between Heart Disease and Brain Aneurysms

By Guest PostNovember 25, 2011Health, ScienceAli Ozturk, aneurysms, atherosclerosis, blood vessels, brain, bursting blood vessels, cardiovascular disorders, constriction of blood vessels, DNA, elasticity, endothelin receptor, genes, genetic risk factors, heart disease, hypertension, intracranial aneurysms, Katsuhito Yasuno, Kaya Bilguvar, mehmet bakircioglu, murat gunel, Richard Lifton, Shrikant Mane, variant of gene, vasospasm, vessel spasm, vessel tone

Yale School of Medicine researchers have discovered that a variant of a gene linked to heart disease also increases the risk of deadly aneurysms of blood vessels in the brain. The discovery of this link raises hopes for new treatments for intracranial aneurysms, which affect more than a half million people worldwide annually.

“Existing drugs already target this common pathway and, in the future, could help treat or prevent aneurysms in people who are at risk,” said Murat Gunel, professor of neurosurgery, genetics and neurobiology and senior author of the study, published the week of Nov. 21 in the Proceedings of the National Academy of Sciences. (more…)

Research Sheds New Light on Body Parts’ Sensitivity to Environmental Changes

By Guest PostNovember 23, 2011Sciencealexander shingleton, beacon, blood sugar levels, body parts, brain, changes in nutrition, energy, evolution in action consortium, fruit flies, glucose, humans, insulin, malnutrition, michigan state university, nongenetic, normal size, sensitive to environmental change, sensitivity to environmental issues, type 2 diabetes, variety of diseases, zeroing, zoology

EAST LANSING, Mich. — Research by a team of Michigan State University scientists has shed new light on why some body parts are more sensitive to environmental change than others, work that could someday lead to better ways of treating a variety of diseases, including Type-2 diabetes.

The research, led by assistant zoology professor Alexander Shingleton, is detailed in the recent issue of the Proceedings of the Library of Science Genetics. (more…)

Yale Researchers Discover Promising Anti-HIV Agents

By Guest PostNovember 23, 2011Health, Sciencebristol myers squibb, chemical compounds, d4t, DNA, effective hiv treatments, festinavir, function of an enzyme, genetic material, hiv 1 reverse transcriptase, hiv and human t cells, hiv drugs, hiv replication, human t cells, infection of human cells, jlj494, karen s anderson, less toxic aids drugs, mariela bollini, non nucleoside reverse transcriptase inhibitors, prevent hiv, prophylactic anti hiv treatment, reverse transcriptase inhibitor, tai shun lin, toxicity, vinay v thakur, wild type, wild type hiv, william h prusoff, william l jorgensen, yung chi tommy cheng, zerit

Researchers at Yale University have discovered new chemical compounds that prevent HIV from replicating in human T-cells. These compounds could result in new, highly effective HIV treatments that are 10 to 2000 times more potent than HIV drugs now on the market.

“The current compounds or slight variants could become drugs,” said Professor William L. Jorgensen, one of two principal investigators behind the research. The other is Karen S. Anderson, a pharmacology professor at Yale School of Medicine. They reported their results online Nov. 15 in the Journal of Medicinal Chemistry. (more…)

A Tailored Pair of Genes

By Guest PostNovember 22, 2011Scienceagriculture, alfalfa like legume, ancestor of legumes, ancestral genes, ancient plants, asteroid, backbone of protein, bacteria, beans, cretaceous period, crop plants, demise of the dinosaurs, dinosaurs, disaster, earth, eggs, fertilizers, genes, genetically engineer legumes, genomes, humans, legumes, living together, major nutrient, medicago truncatula, model, nevin young, nitrogen, nitrogen and phosphorus fertilizer, nitrogen fixation, nitrogen fixing bacteria, nonsynthetic nitrogen fertilizer, peanuts, peas, sequencing genome, soybeans, sperm, synthetic fertilizer, university of minnesota

*For ancient plants, two genes were definitely better than one*

In the wake of the disaster that killed the dinosaurs, the ancestors of today’s crop plants reinvented themselves.

They doubled their genomes, and in that single act set the stage for feeding the world 60 million years later.

In a study published in the Nov. 16 issue of the journal Nature, researchers from the University of Minnesota and other institutions recount how sequencing the genome of a model, alfalfa-like legume revealed the monumental benefits that flowed when the ancestor of legumes acquired an extra copy of every gene. (more…)

UCLA Team Develops Highly Efficient Method for Creating Flexible, Transparent Electrodes

By Guest PostNovember 22, 2011Sciencenanowires, optical transparency, transparent conductors, transparent electrodes

As the market for liquid crystal displays and other electronics continues to drive up the price of indium — the material used to make the indium tin oxide (ITO) transparent electrodes in these devices — scientists have been searching for a less costly and more dynamic alternative, particularly for use in future flexible electronics. (more…)

UTM Study Raises Questions About When and Where Soybeans Were Domesticated

By Guest PostNovember 21, 2011Sciencedomesticated soybeans, domestication of soybean, soybean domestication, soybean in korea, soybean samples, soybeans

If you like tofu, tempeh, edamame or miso soup, you’re a fan of soybeans. But the significance of this legume goes far beyond a few culinary treats — soybeans rank seventh among world crops for tonnage harvested. (more…)

At a Loss for Words

By Guest PostNovember 20, 2011Health, Scienceaphasia, aphasia research project, biological and cognitive processes, brain, brain damage, brain impairs, bullet, celeste barajas, communication impairments, gabrielle giffords, human communication problems, inability to speak or write, language and hearing sciences, language impairment, language recovery, loss of phonology, magnetic resonance imaging, mechanisms of recovery, mri, national institutes of health, network of brain regions, neuroimaging, pelagie beeson, pima county, rehabilitation, scanner, speech, speech language pathology, steven rapcsak, stroke, traumatic brain injury, university of arizona

*Research into aphasia – the inability to speak or write well-formulated sentences and words – is strong at the UA. Researchers have received $2 million toward the study of the condition.*

The National Institutes of Health have awarded the University of Arizona’s Aphasia Research Project in the department of speech, language and hearing sciences a $2 million grant to research communication impairments in adults who have suffered brain injury.

Aphasia – the inability to speak or write well-formulated sentences and words – is a common result of a stroke or a traumatic brain injury such as the one suffered by Rep. Gabrielle Giffords, who was shot in the head earlier this year. The bullet damaged regions of the brain that are critical for language and control of the right side of the body. (more…)

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