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Science News for November 4, 2021


Hybrid artificial neural networks and analytical model for prediction of optical constants and bandgap energy of 3D nanonetwork silicon structures

Researchers propose a hybrid artificial neural network and analytical model to predict optical constants and bandgap energy of novel silicon thin films. The method was found to be 95% accurate in determining the optical properties of these materials, which is challenging due to limited experimental data available.

SourceCompuscript Ltd·JournalOpto-Electronic Advances·DateNov 4, 2021

Study finds alcohol and cannabis sales rose with pandemic

A study published in JAMA Network Open found that monthly alcohol sales increased by an average of 5.5% over expected sales, while cannabis sales surged by 25% during the COVID-19 pandemic. Canadians bought $1.86 billion more alcohol and $811 million more cannabis than predicted based on pre-pandemic trends.

SourceMcMaster University·JournalJAMA Network Open·TypeData/statistical analysis·DateNov 4, 2021

Study finds fish rubbing up against their predators — sharks

A recent study found that fish frequently rub against sharks to remove skin irritants and parasites. This behavior, previously unknown, could play a significant ecological role for aquatic animals. The research team documented over 47 instances of fish chafing against shark skin in 13 locations around the world.

A Child of darkness

Researchers discover partial skull of 4-6 year old Homo naledi child, providing insight into species' growth and development. The skull, named Leti, consists of 28 fragments and six teeth, with estimated brain size comparable to adult members.

SourceUniversity of the Witwatersrand·JournalPaleoAnthropology·DateNov 4, 2021

Ketamine rapidly improves cognitive function making those in suicidal crisis less likely to harm themselves

A five-year study from Columbia University found that a single dose of ketamine improved thinking and reasoning, independent of depressive symptoms, making those in suicidal crisis less likely to harm themselves. The study also showed greater cognitive improvements in those given ketamine compared to midazolam.

SourceColumbia University Irving Medical Center·JournalJournal of Clinical Psychiatry·TypeObservational study·DateNov 4, 2021

Businesses selling non-FDA-approved stem cell products grew four-fold in five years, UCI study says

A US study found that businesses selling non-FDA-approved stem cell products grew four-fold in five years, with California, Texas, and Florida leading the nation. Patients spend thousands of dollars on unproven treatments, posing significant risks to their health, while the industry's lack of regulation endangers public health.

SourceUniversity of California - Irvine·JournalCell Stem Cell·TypeContent analysis·DateNov 4, 2021

Female finches are picky but pragmatic when choosing a mate

A study found that female zebra finches are choosy but flexible in their mating preferences, allowing them to avoid fitness costs. The researchers discovered that these 'wallflowers' can still produce successful fledglings by sneaking eggs into other birds' nests.

SourcePLOS·JournalPLOS Biology·TypeExperimental study·DateNov 4, 2021

Genetic study of heart defects and autism finds new causative genes

Researchers identified 23 genes contributing to congenital heart disease, including 12 previously unknown, using a new algorithm called M-DATA. This method combines genetic data from people with related conditions, increasing the power to identify risk factors and potentially leading to improved treatments.

SourcePLOS·JournalPLOS Genetics·TypeComputational simulation/modeling·DateNov 4, 2021

Green transition creates new risks and rewards

The green transition is already underway, with countries facing unique risks and opportunities based on their degree of competitiveness in fossil fuel markets. Diversifying economies towards low-carbon exports can mitigate negative impacts, while supporting innovation and job creation are key to maintaining long-term competitiveness.

SourceUniversity of Exeter·JournalNature Energy·DateNov 4, 2021

Korea Maritime & Ocean University shows new paths to capturing atmospheric greenhouse gas

Researchers at Korea Maritime & Ocean University have discovered a novel compound, β-HQ clathrates, that can capture both carbon dioxide and nitrous oxide in the atmosphere. The discovery provides valuable insights into the kinetics of trapping these greenhouse gases, which could lead to the development of new gas capture technologies.

SourceNational Korea Maritime and Ocean University·JournalChemical Engineering Journal·TypeExperimental study·DateNov 4, 2021

Child maltreatment incidents are curtailed by prescription drug monitoring programs

A study found that prescription drug monitoring programs in states significantly reduced child maltreatment incidents, with significant declines in neglect and physical abuse cases. The implementation of PDMPs was particularly effective in reducing maltreatment among American Indian and Alaskan Native children.

SourceColumbia University's Mailman School of Public Health·JournalThe Journal of Pediatrics·DateNov 4, 2021

Tropospheric temperature affects tropical cyclone peak intensities in distinct ways

A recent study reveals that tropospheric temperature affects tropical cyclone peak intensities in distinct ways across different basins. In the North Atlantic, significant cooling of the tropopause strengthens peak intensity, while warming in the lower troposphere is associated with strong eastern Pacific TCs.

SourceInstitute of Atmospheric Physics, Chinese Academy of Sciences·JournalAtmospheric and Oceanic Science Letters·DateNov 4, 2021

Experimental drug boosts immunotherapy effectiveness in pancreatic cancer in mice

Researchers found that an experimental dipeptidyl peptidase inhibitor enhanced immunotherapy effectiveness by boosting immune cells around the tumor, reducing growth and eliminating cancer in some mice. The combination treatment also instilled an immune-cell memory, allowing the immune system to recognize and kill cancer cells later.

SourceGeorgetown University Medical Center·JournalJournal for ImmunoTherapy of Cancer·TypeExperimental study·DateNov 4, 2021

UTSW findings advance RAS inhibitors for use in fighting more cancers

Researchers at UT Southwestern Medical Center have made significant breakthroughs in understanding the behavior of mutated RAS proteins, which are responsible for 20-25% of all cancers. By developing new targeted therapies that exploit specific mutations and signaling pathways, they aim to improve treatment options for patients with le...

SourceUT Southwestern Medical Center·JournalNature Structural & Molecular Biology·DateNov 4, 2021

More than a gut reaction

Researchers have discovered that genes regulating synaptic connections between cells are active in specific parts of the digestive chambers of freshwater sponges. This finding suggests that these cells may be evolutionary precursors for the first animal brains, providing insight into the evolution of brain function.

Using environmental modifications, fungicides, and resistant varieties to fight basil downy mildew

To combat basil downy mildew, researchers recommend using resistant basil varieties, as well as environmental modifications like keeping leaves dry and dehumidifying the air. Fungicides are also effective in controlling the disease, but their use must be alternated to prevent resistance development.

SourceAmerican Phytopathological Society·JournalPlant Health Progress·TypeExperimental study·DateNov 4, 2021

Hunting for human obesity genes in fat fruit flies

A new study identifies four novel obesity genes and predicts a fifth, using a platform of fat fruit flies. The research found that these genes are involved in a neuronal signaling pathway that increases fat levels.

SourcePLOS·JournalPLOS Biology·TypeExperimental study·DateNov 4, 2021

Meta-analysis on the relation between acculturation and alcohol use among immigrant youth

A meta-analysis of 43 studies on acculturation and alcohol use among immigrant youth found a statistically significant relationship among the Latinx population. The researchers discovered that length of residence in the US had the strongest correlation to alcohol use, followed by language proficiency and generational status.

SourceNew York University·JournalJournal of Adolescent Health·TypeSystematic review·DateNov 4, 2021

New energy systems could cause a sea change in energy efficiency during shipping

Researchers have created two novel heat recovery systems for LNG ships, boosting energy efficiency by up to 25%. The systems use the organic Rankine cycle (ORC) to recover heat from engine exhaust gas, with substantial improvements in performance depending on fluid combinations.

SourceNational Korea Maritime and Ocean University·JournalEnergy Conversion and Management·TypeComputational simulation/modeling·DateNov 4, 2021

Jet from giant galaxy M87: Computer modelling explains black hole observations

Theoretical physicists modelled the region around M87's supermassive black hole, confirming that gravity plays a key role in accelerating particles out to thousands of light years. The findings provide further evidence for Einstein's theory of general relativity and its application to astrophysical phenomena.

SourceGoethe University Frankfurt·JournalNature Astronomy·TypeComputational simulation/modeling·DateNov 4, 2021

University of Maryland School of Medicine Institute of Human Virology researchers receive $6.5 million to create African big data hub designed to address public health and pandemic preparedness

Researchers at University of Maryland School of Medicine's Institute of Human Virology will use the grant to collect and analyze COVID-19 and HIV data from Nigeria and South Africa. The INFORM Africa project aims to provide new insights into virus mobility and impact, enabling governments to better respond to pandemics.

Forests could be key to estuarine fish conservation

A study published in Conservation Biology found that forests surrounding rivers flowing into the sea increase the diversity of threatened fish species in Japan's estuaries. In contrast, waters surrounded by agricultural land show a decrease in fish populations.

SourceHokkaido University·JournalConservation Biology·TypeData/statistical analysis·DateNov 4, 2021

Breakthrough infection study compares decline in effectiveness for Moderna, Pfizer and Johnson and Johnson vaccines and consequences for mortality

A study of 780,225 Veterans found that protection against COVID-19 declined by 38.8% from February to October 2021 for all vaccine types, with overall vaccine protection declining from 87.9% to 48.1%. Vaccination remained protective against death in those who became infected during the Delta surge.

SourcePublic Health Institute·JournalScience·TypeData/statistical analysis·DateNov 4, 2021

Study finds excess use of non-emergency restraint among older psychiatric patients

A study published in Frontiers in Psychiatry reveals that older psychiatric patients are more likely to be restrained in non-emergency situations than younger adults. The research examined over 226,000 Ontario inpatient records and found a significant association between age, risk of falls, physical disability, and psychiatric symptoms...

SourceUniversity of Waterloo·JournalFrontiers in Psychiatry·DateNov 4, 2021

Ultra-thin crystals as light sources in lasers

Researchers have successfully demonstrated laser emission from ultra-thin crystals consisting of three atomic layers, a breakthrough that could lead to miniaturized circuits and future quantum applications. The discovery showcases the potential of these materials as a platform for new nanolasers capable of operating at room temperature.

SourceUniversity of Oldenburg·JournalNature Communications·TypeExperimental study·DateNov 4, 2021

Say hello to Algol’s new companion candidates

Astronomer Dr. Lauri Jetsu discovers multiple new companion star candidates for the eclipsing binary Algol AB, with orbital periods between 20 and 219 years. The companions are too faint to be detected by modern space telescopes, but their periodic signals can predict observed O-C changes.

SourceUniversity of Helsinki·JournalThe Astrophysical Journal·TypeObservational study·DateNov 4, 2021

Dartmouth study reveals new insights into how the infant microbiome impacts early childhood behavior in boys and girls

A new Dartmouth-led study found a direct association between the infant microbiome and early childhood behavioral health, with sex-specific differences. The study characterized the species of microbes present in each participant's gut and their functions, establishing that microbiome changes occur before behavioral changes.

SourceThe Geisel School of Medicine at Dartmouth·JournalPediatric Research·TypeExperimental study·DateNov 4, 2021

Appearance fixation linked to dating anxiety

A new study by Anglia Ruskin University found that individuals focused on their appearance are more prone to social physique anxiety, which leads to fear of negative evaluations and social distress in dating contexts. The research involved 501 young adults and discovered associations between body image attitudes and dating anxiety.

SourceAnglia Ruskin University·JournalBody Image·DateNov 4, 2021

Researchers reveal information on the collision dynamics of electron/hole with neighboring atoms encoded in the band structure by analyzing high-order harmonic generation in solids

Scientists analyze high-order harmonic generation in solids to understand the underlying mechanism of electron/hole collisions with neighboring atoms. The study maps collision information into the band structure, paving the way for controlling and visualizing electron dynamics.

SourceUltrafast Science·JournalUltrafast Science·TypeExperimental study·DateNov 4, 2021

Nursery plants are plagued by a hidden water mold—plant pathologists have a solution

Plant pathologists have developed a set of Nursery Phytophthora Best Management Practices to eradicate the harmful organisms from nursery stock. Through testing and accreditation programs, nurseries that comply with the guidelines have shown no detectable Phytophthora infection in their stock, enabling habitat restoration plantings.

SourceAmerican Phytopathological Society·JournalPlant Health Progress·TypeExperimental study·DateNov 4, 2021

Montana Lake study reveals how invasive species affect native food webs

A new study from the University of Montana's Flathead Lake Biological Station reveals how invasive lake trout disrupt native food webs, forcing native fishes to feed on suboptimal sources and causing the loss of threatened species like bull trout. The research shows that lake trout can create divergent biological communities over time.

SourceThe University of Montana·JournalProceedings of the National Academy of Sciences·DateNov 4, 2021