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Researchers Develop New, Less Expensive Nanolithography Technique

By Guest PostSeptember 3, 2012Scienceabsorb, albena ivanisevic, approach, biomedical application, chapel hill, humidity, marcus a kramer, micron, nanolithography, nanoscale, north Carolina, polymer, silicon strip, spore, state university, substrate surface, surface, technique, water

Researchers from North Carolina State University have developed a new nanolithography technique that is less expensive than other approaches and can be used to create technologies with biomedical applications.

“Among other things, this type of lithography can be used to manufacture chips for use in biological sensors that can identify target molecules, such as proteins or genetic material associated with specific medical conditions,” says Dr. Albena Ivanisevic, co-author of a paper describing the research. Ivanisevic is an associate professor of materials science and engineering at NC State and associate professor of the joint biomedical engineering program at NC State and the University of North Carolina at Chapel Hill. Nanolithography is a way of printing patterns at the nanoscale. (more…)

Finding Faults

By Guest PostSeptember 2, 2012Environment, Sciencecalvert formation, delaware, dgs, earthquake, eocene, evidence, fault surface, fault zone, finding faults, geologic record, geological survey, grooves and steps, magnitude, miocene, new castle, northern delaware, occurrence, parallel grooves, past earthquake, piney point formation, scott andres, sediment sample, slickensides, smyrna, university of delaware, virginia, well drilling, wildlife area, woodland beach

Delaware Geological Survey discovers evidence of past earthquakes

Delaware Geological Survey (DGS) scientists have uncovered hard proof of faults in northern Delaware, indicating the occurrence of earthquakes millions of years ago.

The geologic evidence turned up in sediment samples removed during a well-drilling project this summer from depths ranging 137 to 251 feet down in Smyrna and the Woodland Beach Wildlife Area.

“People have postulated that there are faults in this area,” DGS Senior Scientist Scott Andres said. “Now we have evidence of it.” (more…)

To Cap or Not to Cap: Scientists Find New RNA Phenomenon That Challenges Dogma

By Guest PostSeptember 2, 2012Sciencebaskar bakthavachalu, brian kennedy, cancer, cell, cell life, chandrama mukherjee, cytoplasm, daniel schoenberg, deepak patil, embryonic development, gene, hibernation, messenger rna, mitotic cell cycle, molecule, mrna, neurological activity, ohio state university, protein, rna

COLUMBUS, Ohio – Some RNA molecules spend time in a restful state akin to hibernation rather than automatically carrying out their established job of delivering protein-building instructions in cells, new research suggests.

And instead of being a fluke or a mistake, the research suggests that this restful period appears to be a programmed step for RNA produced by certain types of genes, including some that control cell division and decide where proteins will work in a cell to sustain the cell’s life.

This could mean that protein production in cells is not as clear-cut as biology textbooks suggest, scientists say. (more…)

Supernovae of the Same Brightness, Cut From Vastly Different Cosmic Cloth

By Guest PostSeptember 1, 2012Sciencecosmic distance, exploding stars, progenitor system, supernova, supernova progenitor system

Berkeley Lab researchers make historic observation of rare Type 1a Supernova

Exploding stars called Type 1a supernova are ideal for measuring cosmic distance because they are bright enough to spot across the Universe and have relatively the same luminosity everywhere. Although astronomers have many theories about the kinds of star systems involved in these explosions (or progenitor systems), no one has ever directly observed one—until now. (more…)

Rose McDermott: The Political Genome

By Guest PostAugust 31, 2012Politics, Sciencealcoholic, american sense, austrailia, biological measure, biology, capital punishment, courtney coelho, data, democrats, denmark, election result, evolutionary perspective, explosion, fraternal twins, gene, genetic contribution, genetic factor, genetic foundation, genetics, hereditary component, obesity, political genome, political preference, political problem, political science, prediction, public policy, reproductive issue, republicans, rose mcdermott, sex, spectrum, statistical test, trends, united states

A recent review of research co-authored by Rose McDermott highlights the role that genes play in political preferences, an area of study that began to draw significant attention in the last decade. McDermott speaks with Courtney Coelho about this growing field of research, its evolutionary roots, and whether it means anything for the prediction of future election results.

The connection between biology and political science is relatively new, but it’s one that has grown rapidly, with a boom in research linking genetics and political preferences in the last decade. Rose McDermott, professor of political science, has done research on this topic and recently co-authored a review, published in Trends in Genetics, of studies in recent years. (more…)

Astronomers Test Einstein in a New Regime Using Pair of Burnt-Out Stars

By Guest PostAugust 31, 2012Sciencebinary systems, burnt out stars, dwarf stars, gravitational waves, orbital decay

AUSTIN, Texas — A team of astronomers led by researchers from The University of Texas at Austin has confirmed the emission of gravitational waves from the second-strongest known source in our galaxy by studying the shrinking orbital period of a unique pair of burnt-out stars. Their observations tested Albert Einstein’s theory of general relativity in a new regime. The results will be published soon in The Astrophysical Journal Letters. (more…)

Why are There so Many Species of Beetles and So few Crocodiles?

By Guest PostAugust 29, 2012Nature, Scienceadaptive zone, alligators, beetles, biodiversity, bird, cichlid fish, crocodile, daniel rabosky, diversity tree, ecological limits, eukaryote, evolutionary biology, evolutionary detectives, factor, fish, fungi, graham slater, life, lizard, mammal, michael alfaro, multi cellular, new zealand, planet, puzzle, reptile, snake, species, species diversity, species richness, theoretical model, tree of life, tuatara

Answer may be ‘adaptive zones’ that limit species number, life scientists report

There are more than 400,000 species of beetles and only two species of the tuatara, a reptile cousin of snakes and lizards that lives in New Zealand. Crocodiles and alligators, while nearly 250 million years old, have diversified into only 23 species. Why evolution has produced “winners” — including mammals and many species of birds and fish — and “losers” is a major question in evolutionary biology.

Scientists have often posited that because some animal and plant lineages are much older than others, they have had more time to produce new species (the dearth of crocodiles notwithstanding). This idea — that time is an important predictor of species number — underlies many theoretical models used by biologists. However, it fails to explain species numbers across all multi-cellular life on the planet, a team of life scientists reports Aug. 28 in the online journal PLoS Biology, a publication of the Public Library of Science. (more…)

Plants Unpack Winter Coats When Days Get Shorter

By Guest PostAugust 29, 2012Sciencecbf, cold response pathway, crepeat binding, crop productivity, factor, freezing, freezing temperature, frost protection, gene, mechanism, michael thomashow, plant, potential tool, sunlight

EAST LANSING, Mich. — Mechanisms that protect plants from freezing are placed in storage during the summer and wisely unpacked when days get shorter.

In the current issue of the Proceedings of the National Academy of Sciences, Michael Thomashow, University Distinguished Professor of molecular genetics, demonstrates how the CBF (C-repeat binding factor) cold response pathway is inactive during warmer months when days are long, and how it’s triggered by waning sunlight to prepare plants for freezing temperatures. (more…)

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