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Penn State


Root discovery may lead to crops that need less fertilizer

Researchers have discovered a way for plants to acquire phosphorus more efficiently by suppressing secondary root growth in favor of primary root growth. This trait allows plants to explore a greater volume of soil and acquire more phosphorus, making it beneficial for farmers growing in nutrient-poor soils.

SourcePenn State·JournalPLANT PHYSIOLOGY·DateJan 18, 2018

Agricultural parasite takes control of host plant's genes

Researchers discovered that a parasitic plant called Dodder can silence the expression of genes in its host plants, including those involved in defense against parasites. By targeting specific regions of the gene sequence, Dodder regulates the flow of nutrients to itself while preventing the host from producing defensive proteins.

SourcePenn State·JournalNature·DateJan 3, 2018

Four-dimensional physics in two dimensions

Researchers at Penn State and ETH Zurich have demonstrated the behavior of particles of light in a two-dimensional array of waveguides, matching predictions for the four-dimensional quantum Hall effect. This achievement provides evidence for higher-dimensional quantum Hall physics, with potential applications in novel photonic devices.

SourcePenn State·JournalNature·DateJan 3, 2018

Father's rejection may increase child's social anxiety, loneliness

Researchers found that father rejection predicted increases in social anxiety, which in turn led to more loneliness in adolescents. Forming good relationships with parents is essential for an adolescent's well-being, with thriving friendships associated with better psychological health and academic performance.

SourcePenn State·JournalJournal of Youth and Adolescence·DateDec 13, 2017

Controlled burns limited severity of Rim Fire

Researchers found that areas recently treated with controlled burns fared better in the 2013 Rim Fire. The best predictor of fire severity was how severe the area last burned, indicating that reducing initial burn severity can limit future fires.

SourcePenn State·JournalEcosphere·DateDec 8, 2017

Conquering traffic congestion with mathematics

A new collaborative engineering project funded by NSF aims to make numerical computation of departure rates and route choice faster, enabling rapid rerouting and diversion. The project uses machine learning to develop statistical models of traffic flow, potentially reducing congestion by seconds, minutes or hours ahead of time.

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