Cold waves triggered by Arctic sea ice loss are memorized in Eurasia, amplifying cooling in subsequent winters. The memory effect contributes to generating atmospheric circulation and advancing winter's arrival.
Researchers at Hokkaido University found that nuclear stress bodies help cells recover from stress by regulating intron retention, a process essential for gene expression. The discovery sheds light on the mysterious organelles' role in stress response and has implications for understanding various biological functions.
A new study found that as ocean warming increases, cold-water species are replaced by warm-water species in marine communities. This shift is driven by species' thermal affinities and can be predicted based on regional temperature changes.
Scientists uncover genetic differences in gene expression that underlie species-specific songs, revealing a key role for brain-derived neurotrophic factor (BDNF) in song learning. The study sheds new light on the evolution of animal behaviors.
Researchers at Hokkaido University developed adhesives inspired by mussels that utilize electrostatic interactions to stick to negatively charged surfaces in saltwater. The adhesiveness was largely thanks to the interaction between positively charged residues on the polymers and the negatively charged surfaces.
A team of scientists has developed new ways to forecast dengue infections by combining disease and climate data. The project aimed to predict maximum weekly cases, the week of peak cases, and total season cases, but models still struggle to accurately predict epidemics.
Strong winter dust storms and a prolonged cold winter season likely contributed to the collapse of the Akkadian Empire in Mesopotamia. The empire's settlements were suddenly abandoned around 4,200 years ago due to agricultural failures and social instability caused by frequent shamals and dry spells.
A study published in PNAS reveals that corticobasal ganglia projecting neurons play a crucial role in song learning during juvenile development. In contrast, adult birds with disrupted projection neurons maintain their pre-learned song structure and exhibit normal vocal fluctuations.
A compound has been identified as effective in killing chemotherapy-resistant glioblastoma-initiating cells (GICs), a major challenge in treating this devastating cancer. The research also showed that the compound is non-toxic to normal cells, raising hopes for developing drugs with low toxicity.
Researchers at Hokkaido University developed a method to control swarming molecular machines using simple mechanical stimuli, exhibiting zigzag patterns or forming vortices. The system uses motor proteins and microtubules, which can self-repair after disruption.
Scientists at Hokkaido University detected nucleobases in a simulated interstellar cloud environment, essential building blocks of DNA. The findings suggest that the processes could lead to the formation of molecular precursors of life.
Chronic pain leads to depression by suppressing brain reward system, say Hokkaido University researchers. Their study found that blocking excessive CRF signals can increase dopamine neuron activity, suggesting potential therapeutic targets for chronic pain and depression.
A new herbivorous hadrosaurid dinosaur, Kamuysaurus japonicus, has been discovered in Japan with three distinct features. The dinosaur, measuring 8 meters long and weighing up to 5.3 tons, is closely related to other Edmontosaurini clade species.
A new beaked whale species, Berardius minimus, has been discovered and confirmed in the waters off Hokkaido. The species exhibits distinct physical characteristics, including a smaller body size, shorter beak, and darker color compared to known species.
Research at Hokkaido University reveals that deeper Arctic snow cover can trigger wave train-like temperature distributions in Eurasia. This phenomenon causes surrounding regions to experience high temperatures due to altered westerly wind patterns.
Researchers used eDNA to survey Japanese and signal crayfish habitats around Lake Akan, finding signal crayfish are widely distributed, potentially threatening native species. eDNA analysis identified presence or absence of aquatic organisms more reliably than conventional methods.
Two known gene mutations, KRAS and TP53, induce pathways that enhance pancreatic cancer's ability to invade tissues and evade the immune system. Mutations in these genes are closely linked to pancreatic ductal adenocarcinoma, a type of pancreatic cancer with a low five-year survival rate.
Scientists have successfully reduced bovine leukemia virus levels in cows by combining an immune checkpoint inhibitor with an enzyme inhibitor, showing promise for controlling other diseases in cattle. The treatment also demonstrated antiviral effects in BLV-infected animals with high viral loads.
A team of scientists has discovered previously unknown binding sites on a bacterial enzyme that could guide novel approaches to antibiotic design. The researchers identified key sections of the MraY enzyme that can be targeted with new drugs to inhibit the spread of certain bacterial infections.
A 38-year study found climate change affects conifer growth, while broad-leaved trees thrive, altering forest composition and ecosystem functions. Climate change accelerates, primeval mixed forests may shift to broad-leaved tree forests, impacting carbon storage, water provision, biodiversity, and wood supply.
A recent study found that the Turkestan cockroach uses periplanones or similar substances as sex pheromones, exhibiting increased sensitivity compared to the American cockroach. This larger glomerulus enables more precise detection of tiny packets of pheromones.
Researchers at Hokkaido University have discovered how a protein called Epe1 maintains a balance between tightly packed and variable DNA structures in yeast cells. This finding could lead to new strategies for suppressing the formation of tumor cells resistant to anti-cancer drugs.
Researchers found that early snowmelt causes Corydalis ambigua flowers to bloom before bumblebee emergence, leading to a mismatch in pollination. This phenological disruption can significantly lower seed-set rates due to inadequate pollination.
Researchers at Hokkaido University discovered that five-armed green brittle stars use a pumping movement pattern to coordinate their movements. A mathematical model suggests that internal fluid flow can achieve this coordination without neuronal activity.
Researchers from Hokkaido University used a taxonomic approach to re-identify the huge birds etched into Peru's desert plains as hermits or pelicans. The study, published in Journal of Archaeological Science: Reports, reveals that the Nasca people drew exotic birds, not local species, which could be a clue to their significance.
Researchers at Hokkaido University successfully assembled a larger biomolecular motor system using DNA origami, overcoming previous scalability challenges. The system, combining fibrous microtubules and motor protein kinesins, exhibits dynamic contraction when energized by ATP.
A team of researchers from Japan and the US found that a gassy insulating layer beneath Pluto's icy surface could be protecting an ocean. The simulations showed that without this layer, the ocean would have frozen hundreds of millions of years ago, but with it, it remains liquid for over a billion years.
Researchers from Hokkaido University used underwater pressure sensors to measure the volume of icebergs breaking off from a glacier, finding a positive correlation with wave amplitude. The study also revealed that submarine melting caused most of the mass loss at the glacier front.
Researchers developed polymers that change color or fluorescence when subjected to mechanical load, addressing limitations of previous force-transducing molecules. The new concept allows for reversible detection of stress and is versatile, enabling applications in built-in monitors and stress mapping.
Scientists at Hokkaido University discovered a compound in cycad roots that triggers the transformation of Nostoc bacteria into motile hormogonia. This process enables the bacteria to provide nitrogen to host plants, potentially leading to more efficient and fertilizer-dependent agricultural production.
Researchers have developed an energy-efficient method to synthesize bioplastic ingredients, overcoming a key limitation in large-scale production. The new technique uses a gold nanoparticle catalyst and achieves high conversion rates, making it more practical for commercial production of sustainable 'green products'.
Researchers found evidence of historic marine life in Alaskan permafrost, revealing that the Beaufort Sea was not completely frozen over during the late Ice Age. This discovery improves scientists' ability to reconstruct past Arctic sea-ice conditions and inform future climate strategies.
A joint team from Hokkaido University and Keio University has identified a key player in the gut defense mechanism of infants, a protein called Sox8. This discovery could help understand how infants develop their own intestinal immune systems after weaning.
Researchers at Hokkaido University developed a computational approach to predict the behavior of clusters of molecules, enabling faster electronic devices with on/off switching and reversible conductivity. This method could lead to the creation of cluster molecular electronics, a new field of science.
Researchers at Hokkaido University used sonar to map the underwater shape of Grey Glacier, revealing a submerged terrace extending 100 meters beyond its visible portion. This unique structure is different from ocean-bound glaciers and can lead to huge chunks of ice falling off, posing a safety risk to humans in the vicinity.
Researchers found that some patients' skin areas return to normal as they age, eliminating mutant loricrin genes through somatic recombination. This natural process could lead to a new treatment method for genetic diseases like loricin keratoderma.
Researchers found the temporoparietal junction significantly activated during cooperative tasks, indicating its role in facilitating cooperation. The anterior part of this region fires off information to the mentalizing system, controlling the flow of information.
A study published in Scientific Reports analyzed forecasts from 14 predictive models submitted to the US Centers for Disease Control and Prevention's influenza season forecasting challenge. The results show that teams with more experience and combined model approaches performed better, highlighting opportunities for future improvement.
Hokkaido University researchers developed a new strategy for solid-state palladium-catalysed cross-coupling reactions using mechanochemistry, enabling efficient solvent-free synthesis of organic materials. Adding olefin facilitates a more efficient reaction, increasing conversion rates from less than 30% to 99%.
Researchers at Hokkaido University developed a porous material that turns yellow to reddish-brown when exposed to acid vapor, returning to its original color upon removal. The material's stability is remarkable, maintaining its structure at high temperatures and resisting common organic solvents.
Researchers at Hokkaido University found that inhibiting a bone receptor protein called Siglec-15 can increase bone mass and strength without impairing growth in young rats. This suggests that anti-Siglec-15 therapy could be an alternative treatment for juvenile osteoporosis, potentially with an ideal safety profile.
Hokkaido University researchers have developed a strategy to fabricate materials that become stronger in response to mechanical stress. By employing 'double-network hydrogels,' they were able to create soft, yet tough materials that can adapt and strengthen based on surrounding conditions.
Researchers found that rats without a Y chromosome develop as males due to the expression of different zinc finger protein genes. These genes compensate for the absence of SRY and stimulate male sexual differentiation.
Researchers engineered a virus that selectively targets and kills cancer cells, surpassing another viral treatment currently in use. The modified adenovirus, dl355, replicates more efficiently in cancer cells than normal cells, resulting in higher cancer cell kill rates.
Researchers have successfully constructed a three-dimensional human epidermis based on predictions made by their mathematical model of epidermal homeostasis. The epidermal equivalent exhibits excellent barrier functionality and thickness, providing a promising new tool for basic research and drug development.
Researchers found that female penises in geographically distinct species of bark lice evolved separately due to environmental pressures and competition for male seminal gifts. The study suggests that the evolution of female penises is linked to sexual selection and mating behaviors.
Research at Hokkaido University found that the body's stress response is weaker in the evening, potentially making individuals more susceptible to stress. Cortisol levels were significantly higher in volunteers who took a morning stress test compared to those who took an evening test.
A recent study by Hokkaido University scientists investigates the impact of organic compounds from seawater on atmospheric aerosols and cloud formation. The research found that sea spray aerosols contain a larger proportion of humic-like substances, which can suppress cloud formation.
A research team at Hokkaido University found that lower TRIM29 levels correlate with more mobile and invasive squamous cell carcinoma cells, leading to a worse prognosis. The TRIM-29/keratin interaction plays a crucial role in regulating cell shape and motility.
Repeated exposure to anti-viral signaling molecules trains the innate immune system to react more efficiently. Fibroblasts exhibit faster and greater activation of anti-viral genes after subsequent stimulations, indicating specific memory in the innate immune system.