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Science News for July 10, 2020


Optical shaping of polarization anisotropy in a laterally-coupled-quantum-dot dimer

Researchers found emission from laterally coupled quantum dots is strongly polarized along the coupling direction and can be shaped by changing excitation polarization. This control enables optically-controlled anisotropic wavefunctions, opening new avenues for data storage and thermoelectric energy harvesting.

More than meets the eye

A new study finds that people with face blindness use different memory processes for face recognition, relying on familiarity rather than recollection. The research suggests that successful facial recognition requires more than a vague familiarity with a face.

SourceHarvard Medical School·JournalCortex·DateJul 10, 2020

Construction: How to turn 36 seconds into USD 5.4 billion

A study from Aarhus University links national productivity statistics with actual work done on construction sites, revealing a decline in productivity since the 1970s. By optimizing processes, contractors can generate an estimated $5.4 billion annually in the US and Canada by spending just 36 seconds more per hour on value-adding work.

SourceAarhus University·JournalJournal of Construction Engineering and Management·DateJul 10, 2020

Largest study of prostate cancer genomics in Black Americans ids targets for therapies

A new study has identified genes more frequently altered in prostate tumors from men of African ancestry compared to other racial groups. The research found no significant differences in frequencies of mutations in genes important for current prostate cancer therapies, but suggests that precision medicine approaches can be effective if...

SourceUniversity of California - San Francisco·JournalClinical Cancer Research·DateJul 10, 2020

COVID-19 can be transmitted in the womb, reports pediatric infectious disease journal

A recent study reports evidence of intrauterine transmission of SARS-CoV-2 from mother to infant, highlighting the importance of protecting pregnant women from COVID-19. The findings suggest that infection can occur during pregnancy, and researchers emphasize the need for further research into mechanisms and risk factors.

SourceWolters Kluwer Health·JournalThe Pediatric Infectious Disease Journal·DateJul 10, 2020

Extraordinary regeneration of neurons in zebrafish

Biologists at the University of Bayreuth have discovered a unique form of rapid regeneration in zebrafish neurons. Mauthner cells, responsible for escape behavior, can regenerate their axons within a week after injury. This finding disproves the widely accepted view that these cells are unable to regenerate.

SourceUniversität Bayreuth·JournalCommunications Biology·DateJul 10, 2020

Liquid metal synthesis for better piezoelectrics: Atomically-thin tin-monosulfide

A new study applies liquid-metal synthesis to create atomically-thin tin-monosulfide with excellent electronic and piezoelectric properties, enabling flexible nanogenerators for wearable electronics and biosensors. The resulting material displays high durability and flexibility, making it suitable for commercial implementation.

Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications

Researchers propose a novel vdW heterostructure for MIR light-emission applications using BP and TMDC materials. The BP-WSe2 heterostructure shows a type-I band alignment, enhancing MIR photoluminescence by ~200%. In contrast, the BP-MoS2 heterostructure forms a type-II band alignment, enabling efficient MIR electroluminescence.

How Venus flytraps snap

A new study reveals that a single slow touch on the Venus flytrap's trigger hair can also trigger trap closure, allowing it to catch slow-moving larvae and snails. The researchers used highly sensitive sensors and mathematical models to determine the forces needed to trigger the mechanism.

SourceUniversity of Zurich·JournalPLOS Biology·DateJul 10, 2020

Orbital engineering of quantum confinement in high-Al-content AlGaN quantum well

Researchers propose orbital engineering to overcome efficiency limitations in high-Al-content AlGaN quantum wells. By inclining the quantum well plane, they modify energy variations induced by orbital coupling, enhancing quantum confinement and radiative transition rates.

Nano-radiomics unveils treatment effect on tumor microenvironment

Researchers developed a noninvasive method to assess the effect of cellular immunotherapies on the tumor microenvironment, which inhibits the immune response and evades cancer treatments. Nano-radiomics combines imaging technology with radiomics to analyze changes in the TME that conventional methods cannot detect.

SourceBaylor College of Medicine·JournalJournal of Mathematical Sciences Advances and Applications·DateJul 10, 2020

Alaskan volcano linked to mysterious period with extreme climate in ancient Rome

Researchers from the University of Copenhagen have found evidence suggesting that a megaeruption of an Alaskan volcano, Okmok, may be responsible for widespread climate change in ancient Rome and Egypt. The eruption is believed to have occurred around 43 BCE, causing temperatures to drop by as much as seven degrees Celsius.

SourceUniversity of Copenhagen·JournalProceedings of the National Academy of Sciences·DateJul 10, 2020

T-ray camera speed boosted a hundred times over

A research team at the University of Warwick has developed a single-pixel terahertz imaging technology that reaches 100 times faster acquisition than the previous state-of-the-art. This breakthrough enables potential use in biomedical and industrial applications, including non-invasive security and medical screening.

SourceUniversity of Warwick·JournalNature Communications·DateJul 10, 2020

Sobering reminder about liver disease

Australian experts warn of a surge in chronic liver disease due to alcohol misuse and obesity-related liver disease. The number of cases has increased three-fold over the past 10-15 years, with over 6 million Australians affected.

SourceFlinders University·JournalClinical Gastroenterology and Hepatology·DateJul 10, 2020

Study: Medicaid expansion meant better health for the most vulnerable low-income adults

A new study found that Michigan's Medicaid expansion program significantly improved health outcomes for the most vulnerable residents, including those with extremely low incomes and chronic health conditions. The program also saw improvements in health among participants of all ages, backgrounds, and geographic regions.

SourceMichigan Medicine - University of Michigan·JournalJAMA Network Open·DateJul 10, 2020

New biomarker for dementia diagnosis

Researchers have identified a new biomarker, asymmetric dimethylarginine (ADMA), associated with cognitive decline in old age. The study found that ADMA levels were linked to decline in cognitive performance assessments after four years.

SourceFlinders University·JournalInternational Journal of Geriatric Psychiatry·DateJul 10, 2020