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Science News for January 26, 2017


Earth's orbital variations and sea ice synch glacial periods

A new study by Brown University researchers shows that the 100,000-year orbital cycle and the 21,000-year precession cycle work together to drive the glacial cycle. The team found that sea ice in the Southern Hemisphere plays a crucial role in modulating the effects of precession on global temperature, leading to an expansion of sea ic...

SourceBrown University·JournalGeophysical Research Letters·DateJan 26, 2017

Antioxidants get small

Researchers at Rice University have created single-molecule compounds that quench damaging reactive oxygen species, offering a new basis for antioxidant therapies. The molecules, called PEG-PDI, are true mimics of superoxide dismutase enzymes and show promise for treating cancer, traumatic brain injuries, and chronic diseases.

SourceRice University·JournalACS Nano·DateJan 26, 2017

Cosmic lenses support finding on faster than expected expansion of the universe

Astronomers using the Hubble Space Telescope have made an independent measurement of the universe's expansion rate, consistent with earlier findings but in disagreement with measurements from the early Universe. The study uses galaxies as giant gravitational lenses to determine the Hubble constant to a high precision.

SourceESA/Hubble Information Centre·JournalMonthly Notices of the Royal Astronomical Society·DateJan 26, 2017

Boron atoms stretch out, gain new powers

Researchers at Rice University simulated one-dimensional boron materials, which exhibited mechanical stiffness comparable to the highest-performing nanomaterials. The new findings also revealed that these materials can act as constant-force springs and display unique electronic properties.

Globe-trotting pollutants raise some cancer risks 4 times higher than predicted

A new study reveals that tiny particles can shield pollutants like polycyclic aromatic hydrocarbons (PAHs) from degradation, allowing them to travel farther and increasing lung cancer risk. The findings quadruple the estimated global lung cancer risk from a pollutant caused by combustion, exceeding World Health Organization limits.

SourceOregon State University·JournalProceedings of the National Academy of Sciences·DateJan 26, 2017

Leprosy strain genotyped from medieval pilgrim at UK burial site

Researchers analyzed a medieval skeleton found in a leprosy hospital cemetery in Winchester, UK, and discovered the strain of leprosy it carried was genetically distinct from others, linked to South-Central and Western Asia. The findings suggest that resistance to the disease may have developed over time.

SourcePLOS·JournalPLOS Neglected Tropical Diseases·DateJan 26, 2017

How 1000 new genetic variants were discovered in blood groups

A recent study by Lund University researcher Mattias Möller has identified 1000 new genetic variants in blood group genes, which could have negative effects during blood transfusions. The discovery was made possible by developing a new computer program to process the genomes of 2504 people, providing insights into human genetic variation.

SourceLund University·JournalBlood Advances·DateJan 26, 2017

The secret of the supervolcano

Scientists at Uppsala University reveal the secret behind massive volcanic eruptions, discovering chemical clues in quartz crystals that hint at magma assimilating a local rock rich in water, leading to increased gas pressure and catastrophic eruptions.

SourceUppsala University·JournalScientific Reports·DateJan 26, 2017

Limited HIV testing access for Baltimore youth

A new survey found that 59% of Baltimore's youth-serving organizations do not offer HIV testing, highlighting the need for better integration of community-based services and clinical care. Organizations with HIV testing were more likely to provide general health services and referral services for sexually transmitted infections screening.

SourceJohns Hopkins Medicine·JournalPublic Health Reports·DateJan 26, 2017

Hospital-led interventions associated with significant reduction in cesarean rate

A new study at Beth Israel Deaconess Medical Center found that hospital-led interventions significantly reduced the Cesarean delivery rate from 34.8% to 21.2% over a seven-year period. The interventions included quality improvement measures such as standardized protocols, increased provider education and revised guidelines.

SourceBeth Israel Deaconess Medical Center·JournalThe Joint Commission Journal on Quality and Patient Safety·DateJan 26, 2017

Scientists map the genetic evolution of dinoflagellates for the first time

A four-year genetic research effort has mapped the major landmarks in the evolution of dinoflagellates, a key species in the environment. The study found that nonphotosynthetic dinoflagellates have retained vital metabolic functions and could lead to a better understanding of bioluminescence and toxic algal blooms.

SourceUniversity of Maryland Center for Environmental Science·JournalProceedings of the National Academy of Sciences·DateJan 26, 2017

Metallic hydrogen, once theory, becomes reality

Researchers successfully created atomic metallic hydrogen using diamond anvil cells at extreme pressures, offering potential applications in high-energy storage, superconductors, and rocket propulsion. The discovery could transform various industries, including energy production and space exploration.

SourceHarvard University·JournalScience·DateJan 26, 2017

A cellular system makes the battle against a rare disease personal

Researchers have created a human stem-cell based system to find drugs for mitochondrial disease. They extracted skin cells from patients with faulty mitochondria and used them to identify a promising potential drug called avanafil. This breakthrough gives the potential for truly personalized treatments for rare diseases.

How fast is the universe expanding? Quasars provide an answer

The H0LiCOW collaboration has made a new measurement of the Hubble constant using quasars and gravitational lensing. The result agrees with recent independent studies but disagrees significantly with cosmic microwave background measurements, potentially indicating new physics beyond the standard cosmological model.

SourceEcole Polytechnique Fédérale de Lausanne·JournalMonthly Notices of the Royal Astronomical Society·DateJan 26, 2017