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Science News Archive March 2020 - Page 22


Page 22 of 41

Silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm

Scientists from Zhejiang University and Southeast University in China proposed a novel silicon-graphene hybrid plasmonic waveguide, achieving high-performance photodetectors beyond 1.55 μm. The graphene absorption efficiencies are as high as 54.3% and 68.6%, with measured responsivities of 30-70 mA/W at 2 μm and 0.4 A/W at 1.55 μm.

Flexible 'heroes' save delicate proteins from stress

A new class of proteins, dubbed 'Hero', has been discovered that protects vulnerable proteins from aggregation and denaturation under extreme heat and other stresses. These flexible proteins may help prevent neurodegenerative diseases such as ALS and Huntington's disease by preserving molecular order.

SourcePLOS·JournalPLOS Biology·DateMar 13, 2020

Scientists work toward more reliable prediction of South Asian summer monsoon rainfall for the upcoming 15-30 years

Researchers used ensemble simulations to quantify uncertainty caused by internal variability in SASM rainfall projections. They found a linkage between the Interdecadal Pacific Oscillation (IPO) phase and the spread in projected SASM rainfall, identifying IPO as a leading internal mode influencing near-term projection.

Invisible plastics in water

A study by Washington State University researchers reveals that over 90% of US tap water contains nanoscale plastics, with unknown health and environmental consequences. The team is now working on techniques to remove these plastics from water.

SourceWashington State University·JournalWater Research·DateMar 13, 2020

Buffed-up avatars deter us from exercising hard

Researchers discovered that competing against an idealised avatar negatively impacts physical performance, whereas a realistic avatar increases motivation and improves outcomes. The study suggests that exergame designers should use realistic avatar customisation to enhance player experience and performance.

The need for speed

Researchers at NCBS discovered that dopamine released by nerve cells activates faster motor neurons, allowing zebrafish to swim faster. This finding suggests motor neuron plasticity can be exploited for rehabilitation after spinal cord injury or stroke.

SourceNational Centre for Biological Sciences·JournalCurrent Biology·DateMar 12, 2020

Statins starve cancer cells to death

Researchers at Johns Hopkins Medicine have discovered that statins can kill cancer cells by blocking the creation of a molecule necessary for their survival. The study suggests that statins may be valuable in combating certain types of cancer and could lead to new treatment options.

SourceJohns Hopkins Medicine·JournalProceedings of the National Academy of Sciences·DateMar 12, 2020

Genes tell a story about diabetic kidney disease

Scientists have identified several genes that may be involved in the development of diabetic kidney disease. By analysing Finnish samples with diabetes, researchers found connections between specific proteins and the condition. The study's findings suggest new potential targets for treating diabetic kidney disease.

SourceDuke-NUS Medical School·JournalJournal of the American Society of Nephrology·DateMar 12, 2020

What causes an ice age to end?

A study by University of Melbourne researchers found that increased tilt angle of the Earth's axis triggers warmer summers, melting Northern Hemisphere ice sheets and ending ice ages. The team used stalagmites and ocean sediment records to determine the age of two terminations around 960,000 years ago.

SourceUniversity of Melbourne·JournalScience·DateMar 12, 2020

Healthier and happier without Facebook

Participants who reduced their Facebook usage experienced fewer depressive symptoms, were more active physically, and showed increased life satisfaction. Reducing social media time may help prevent addictive behavior and support a healthier lifestyle.

SourceRuhr-University Bochum·JournalComputers in Human Behavior·DateMar 12, 2020

Banded mongoose study reveals how its environment influences the spread of infectious disease

The study found that land type significantly influences the interaction of vigilance and scent marking behavior in banded mongooses. In environments with high predator presence, such as national parks, mongoose exhibited reduced scent marking behaviors, while in areas with low predator risk, like tourism lodges, these behaviors increased.

SourceVirginia Tech·JournalFrontiers in Ecology and Evolution·DateMar 12, 2020

Moving beyond 'defensive medicine'

A new study by MIT economists finds that doctors who have immunity from liability lawsuits perform slightly more C-section operations compared to those who are legally liable, about 4% more over a 10-year period. This challenges the common perception that defensive medicine leads to less treatment of patients.

SourceMassachusetts Institute of Technology·JournalJournal of Empirical Legal Studies·DateMar 12, 2020

Something in the water

A Brazilian study found that consuming contaminated water with saxitoxin worsens Zika neurotoxicity, tripling cell mortality and causing microcephaly-like malformations. This research highlights the public health problem of low water quality in the Northeast region, exacerbating the effects of arbovirus diseases.

SourceD'Or Institute for Research and Education·JournalPLOS Neglected Tropical Diseases·DateMar 12, 2020

At 8 months, babies already know their grammar

At 8 months, babies demonstrate a grasp of grammatical concepts in French, recognizing function words such as articles and prepositions. They exhibit limited interest in new functors, suggesting an innate understanding of their mother tongue's linguistic structure.

SourceCNRS·JournalCurrent Biology·DateMar 12, 2020

Digital tools for agriculture

The AgriSens research network is developing digital tools to assist farmers in crop production, including planning irrigation and making harvest forecasts. The project aims to create low-threshold services for farmers to utilize remote sensing data and satellite information.

Researchers create focus-free camera with new flat lens

The new flat lens design allows for a depth of focus several orders of magnitude larger than that of an equivalent conventional lens, enabling simultaneous focus on objects at varying distances. This breakthrough has significant implications for camera applications, including smartphones, biomedical imaging, and automobile cameras.

SourceOptica·JournalOptica·DateMar 12, 2020

Cancer: The immune system attacks tumors remotely

Researchers at Institut Pasteur found that immune cells can attack cancer cells remotely through soluble molecules like interferon-gamma. This discovery supports a key target for future immunotherapy approaches and may enable T lymphocytes to act on a large number of cancer cells.

SourceInstitut Pasteur·JournalNature Cancer·DateMar 12, 2020