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Science News for October 18, 2012


Optical vortices on a chip

A team of scientists has developed integrated arrays of optical vortex beams on a silicon chip, which can be used to transmit multiple streams of information. This breakthrough could enable the creation of compact and high-density devices for applications such as sensing and microscopic particle manipulation.

SourceUniversity of Bristol·JournalScience·DateOct 18, 2012

From the Alps to the Deep Mantle

Two new studies provide insights into the formation of the European Alps and ancient sanukitoids. Reconstructing pre-glacial topography reveals most glacial erosion occurred in lower parts of the Alpine catchments, while aseismic creep has begun on major strike-slip faults like the North Anatolian Fault.

SourceGeological Society of America·JournalGeology·DateOct 18, 2012

Expalination for ball lightning

Australian scientists unveil new mathematical theory explaining ball lightning, citing ion accumulation on glass windows as key factor. The theory suggests a driving electric field of about a million volts is required to form a ball discharge.

Germs in space: Preventing infection on long flights

A new paper by Dr. Leonard Mermel reveals that microgravity weakens the immune system while increasing antimicrobial resistance in some microorganisms. In a spacecraft, germs can remain airborne for longer periods and spread more easily due to power limitations and recirculated air.

SourceBrown University·JournalClinical Infectious Diseases·DateOct 18, 2012

Rethinking toxic proteins on the cellular level

A new study at the University of Rochester has discovered that lipid droplets store histones, making them available for chromosome assembly. The findings suggest that binding to lipid droplets protects histones from being toxic to cells. This research challenges existing theories on histone balance and its mechanism.

SourceUniversity of Rochester·JournalCurrent Biology·DateOct 18, 2012

The hidden burden of bovine Tuberculosis

A new study published in PLOS Computational Biology found that up to 21% of herds in Great Britain may be hiding bovine Tuberculosis despite restrictions. The study used mathematical models to estimate the efficiency of cattle-based controls for the disease, which had previously been eliminated in the UK.

SourcePLOS·JournalPLOS Computational Biology·DateOct 18, 2012

Living in ethnically homogenous area boosts health of minority seniors

A study by Columbia University researchers found that African-American and Mexican-American seniors living in predominantly ethnic neighborhoods had lower rates of heart disease and cancer compared to those living in more mixed areas. Cultural factors such as shared values and close-knit family structures may contribute to these findings.

SourceColumbia University's Mailman School of Public Health·JournalAmerican Journal of Public Health·DateOct 18, 2012

College students and credit card debt -- parents at fault?

A study by Adam Hancock and colleagues found that college students with parents who argue about finances are more likely to have multiple credit cards and higher credit card debt. The researchers analyzed data from over 400 undergraduate students, discovering that parental influence plays a significant role in shaping financial behavio...

SourceSpringer·JournalJournal of Family and Economic Issues·DateOct 18, 2012

Food versus fuel: Is there surplus land for bioenergy?

The study suggests that a thorough reassessment of land availability for bioenergy production is needed to account for environmental and socio-economic constraints. Policy recommendations aim to resolve conflicting land-use demands and promote sustainable development.

SourcePensoft Publishers·JournalBIORISK – Biodiversity and Ecosystem Risk Assessment·DateOct 18, 2012

Taking race out of the equation in measuring women's risk of osteoporosis and fractures

A new approach for assessing fracture risk combines bone density measures with body size and bone size, predicting risk accurately regardless of race or ethnicity. The study found that this composite bone strength index performed just as well as traditional methods in a group of nearly 2,000 women.

SourceUniversity of California - Los Angeles Health Sciences·JournalThe Journal of Clinical Endocrinology & Metabolism·DateOct 18, 2012

Antibiotic shows promise in treating extensively drug-resistant tuberculosis

A study found that linezolid, an antibiotic used to treat severe bacterial infections, proved largely effective in treating extensively drug-resistant tuberculosis (XDR-TB) when added to ongoing treatment regimens. However, 82% of patients experienced significant adverse events that may have been related to the drug.

SourceNIH/National Institute of Allergy and Infectious Diseases·JournalNew England Journal of Medicine·DateOct 18, 2012

Solar power is contagious

A Yale University study found that residents in areas with existing solar installations are more likely to adopt the technology, with a 54% increase in adoption when the installed base grows by 10%. The visibility of panels and word-of-mouth also play a role in larger installations.

SourceYale University·JournalMarketing Science·DateOct 18, 2012

Short booms still annoying: Scientists study how mid-level noise bursts lasting less than a second affect the concentration of arithmetic-solving test subjects

Researchers from the University of Nebraska – Lincoln played quarter-second-long white noise clips to test subjects working on arithmetic problems. The researchers found that louder noises caused lower performance and higher levels of annoyance, with sound level ranges affecting participants' perceptions.

How to prove a sexual addiction

A UCLA-led team of experts found the proposed criteria to be reliable and valid in helping mental health professionals diagnose hypersexual disorder. The study accurately classified 88% of patients as having the disorder, with significant consequences including job loss, relationship end, and emotional distress.

SourceUniversity of California - Los Angeles·JournalThe Journal of Sexual Medicine·DateOct 18, 2012

First-of-its-kind self-assembled nanoparticle for targeted and triggered thermo-chemotherapy

Researchers at Brigham and Women's Hospital have developed a first-of-its-kind self-assembled nanoparticle that can deliver chemotherapy specifically to cancer cells and release it in response to external NIR light, creating heat for synergistic anti-tumor efficacy. The platform successfully eradicated tumors in pre-clinical models.

SourceBrigham and Women's Hospital·JournalAngewandte Chemie·DateOct 18, 2012

Stroke patients benefit from carmaker's efficiency

Researchers at Washington University School of Medicine applied Toyota's lean manufacturing process to improve stroke treatment times, reducing average door-to-needle time from 58 to 37 minutes. The new protocol eliminated inefficient steps and allowed for simultaneous patient care tasks.

SourceWashU Medicine·JournalStroke·DateOct 18, 2012

Criminal punishment and politics: Elected judges take tougher stance prior to elections

Research finds that elected judges in Washington state hand down harsher sentences in the last three months before an election, with a 10% increase in sentence length compared to earlier terms. Judges become more calculated and deviate from guidelines more often when re-election is at stake.

SourceUniversity of California - Berkeley Haas School of Business·JournalThe Review of Economics and Statistics·DateOct 18, 2012

Ongoing disparities in breastfeeding highlighted at Fourth Annual Summit on Breastfeeding

The Fourth Annual Summit on Breastfeeding highlighted ongoing disparities in breastfeeding, with only 44% of African-American women reporting breastfeeding compared to 66 and 68% for Hispanic and white women. The summit also explored the role of access to support, counseling, and equipment as a means to increase breastfeeding rates.

SourceMary Ann Liebert, Inc./Genetic Engineering News·JournalBreastfeeding Medicine·DateOct 18, 2012

Food vs. fuel: Is there surplus land for bioenergy?

A team of researchers investigated whether 'surplus' land can be used to produce feedstock for bioenergy. They found that land-use conflicts between food and energy production are a pressing issue. The study suggests clarifying the definition of surplus land and taking environmental and socio-economic factors into account.

SourceHelmholtz Association·JournalBIORISK – Biodiversity and Ecosystem Risk Assessment·DateOct 18, 2012