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Teens get more sleep when school starts later

Research by Penn State found that high school start times after 8:30 a.m. increased the likelihood of teens obtaining eight hours of sleep, benefiting their overall health. Earlier school start times were associated with decreased time in bed and morning wake-up times.

SourcePenn State·JournalSleep Health·DateDec 1, 2017

Uncertainty surrounds US livestock methane emission estimates

A new study challenges previous estimates of US livestock methane emissions, suggesting a significant discrepancy between top-down and bottom-up approaches. The researchers used a spatially explicit approach to estimate enteric methane emissions for cattle and manure methane emissions for swine and poultry.

SourcePenn State·JournalEnvironmental Science & Technology·DateNov 30, 2017

Certain popular cigars deliver more nicotine than cigarettes

Researchers at Penn State found that popular cigar brands deliver more nicotine than commonly used cigarettes. The study suggests that small cigars, often perceived as safer alternatives, are just as addictive and harmful. The researchers plan to explore further comparisons between the toxins released by cigars and cigarettes.

SourcePenn State·JournalNicotine & Tobacco Research·DateNov 22, 2017

A curious quirk brings organic diode lasers one step closer

Scientists have successfully created the first continuous-wave lasing in an organic-inorganic lead halide perovskite semiconductor, which could be a crucial step towards developing electrically driven devices. By adjusting the material's temperature, they avoided a phenomenon known as lasing death and achieved over an hour of lasing.

SourcePenn State·JournalNature Photonics·DateNov 20, 2017

Confusion, different priorities may cause EMTALA violations

A study by Penn State researchers found that EMTALA violations are often caused by confusion about the law and conflicting priorities between healthcare professionals. Hospitals may not report suspected violations due to financial pressure, referral burdens, or reluctance to maintain good relationships with other hospitals.

SourcePenn State·JournalJournal of Healthcare Risk Management·DateNov 14, 2017

Researchers examine social identity threat and religion in the US

A new US study examines how social identity threat affects religion and finds that highly religious individuals, particularly Christians, feel targeted and experience prejudice. The study reveals that religious minorities like Jews and Muslims also face heightened threat, likely due to prejudice and discrimination.

SourcePenn State·JournalSocial Psychological and Personality Science·DateNov 14, 2017

'Zombie ant' brains left intact by fungal parasite

A study led by Penn State researchers found that a fungal parasite controls the behavior of carpenter ants without infecting their brains. The fungus surrounds and invades muscle fibers throughout the ant's body, forming a network to collectively control host behavior.

SourcePenn State·JournalProceedings of the National Academy of Sciences·DateNov 7, 2017

Synthetic material acts like an insect cloaking device

Researchers have developed a synthetic material that can absorb light from all directions, making it suitable for antireflective coatings. This material is similar to the brochosomes used by leaf hopper insects to blend in with their backgrounds, allowing them to hide from predators.

SourcePenn State·JournalNature Communications·DateNov 3, 2017

Chip-based sensors with incredible sensitivity

Penn State electrical engineers create microchip-based sensors for multiple applications, including motion, temperature, pressure and biochemical sensing, using innovative on-chip glass microspherical shell whispering gallery mode resonators.

SourcePenn State·JournalScientific Reports·DateNov 2, 2017

Like it or not: Broccoli may be good for the gut

Researchers found that broccoli's indole glucosinolates can activate the Aryl hydrocarbon receptor in the intestinal lining, maintaining a healthy balance in gut flora and immune surveillance. This may help prevent diseases like various cancers and Crohn's Disease caused by inflammation.

SourcePenn State·JournalJournal of Functional Foods·DateOct 12, 2017