Researchers identified 48 OR genes, 2 V1R genes, and 135 V2R genes in hagfish, indicating functional roles in smell perception. The discovery overturns the assumption that true V2Rs evolved only in jawed vertebrates.
The Chinese hwamei, an invasive alien bird species, has expanded into Japan's mountainous regions, including alpine zones. The study found that it breeds in these areas during the summer and migrates to lower elevations in winter.
A study of 198 male rugby players found that injuries caused by indirect contact had a high incidence and burden, while tackle direction was associated with injury severity. The insights gained can guide targeted prevention programs for knee injuries in rugby.
Researchers used long-read sequencing to analyze the nuclear genome of Amorphochlora amoebiformis, revealing an extremely high proportion of introns (74%) compared to other eukaryotic genomes. The study provides important insights into the evolutionary dynamics and potential functional roles of introns in eukaryotic genomes.
Researchers discovered cerebellar signals strengthen visual cues during learning, facilitating precise visuomotor associations. This finding highlights the cerebellum's crucial role in cognitive functions beyond motor control.
Researchers developed a genetically informed dynamic species distribution model to reconstruct the distributional history of wild Piper nigrum from 21,000 years ago. The model identified glacial refugia and patterns of range contraction, expansion, and fragmentation following the Last Glacial Maximum.
The University of Tsukuba developed a Japanese version of WHO indicators to assess inclusive social participation of persons with disabilities. The indicators were validated through an online survey among persons with and without disabilities, demonstrating strong internal consistency and construct validity.
A study analyzed large-scale human ChIP-seq data to identify unmeasured transcription factor-tissue/cell type pairs, revealing significant gaps in current knowledge. These findings indicate that essential regulatory mechanisms may have been overlooked, emphasizing the need for strategic prioritization of measurement targets.
This study investigates how environmental variability and human migration influence the evolution of cooperation among humans. Simulation results reveal that cooperation is more likely to evolve when these factors are sufficiently high, hindering non-cooperative groups and encouraging cooperative groups.
Strong EAWM enhances upward heat fluxes, cooling sea surface temperatures south of Japan, modifying storm-track activity and intensifying the monsoon. A feedback loop emerges: cold air cools the ocean, reinforcing the monsoon.
Scientists found a cluster of non-visual, light-sensitive neurons in sea urchin larvae, similar to the vertebrate brain, and discovered that disrupting these neurons impairs light-dependent swimming behavior.
A multinational study found PSC prevalence among Asian IBD patients to be markedly lower than in Western countries, associated with more favorable clinical outcomes. The proportion of asymptomatic PSC cases has increased due to improved imaging modality detection, allowing for early-stage diagnosis and reduced liver transplantation rates.
High-resolution label-free imaging reveals stable organelle dynamics and spatial organization, overcoming phototoxicity and halo artifacts. ExAPC microscopy captures biomolecular condensate-like structures and cellular responses to drugs.
Japanese primary care physicians derive a sense of meaning from managing diverse health problems, fostering rapport through continuous care, and collaborating with other healthcare professionals. These experiences promote professional growth and contribute to broader societal goals, building fulfilling careers.
The study analyzed eye movement data to predict processing effort and found that word and sentence length are effective predictors of text readability among English learners. This approach provides valuable insights for selecting reading materials and developing reading tests.
A study by University of Tsukuba researchers found that a cartoon-based diabetes education was comparable to traditional lectures in improving children's knowledge and physical activity levels. The manga-focused approach showed higher psychological satisfaction among participants, leading to improved test scores and physical activities.
Researchers developed a machine learning technique to analyze plasma emission spectra, accurately identifying valence states and predicting film growth rates. This method uses full-wavelength information and can be used for real-time film deposition control technology.
Research on 1,000 older Japanese adults found that declining hand function significantly increases the risk of requiring long-term care. Hand function below a certain threshold was associated with an increased risk, highlighting its importance for daily activities and overall health.
Researchers at the University of Tsukuba identified a peptide hormone called Capa that regulates calcium levels in fruit flies. The study found that Capa is secreted by specific neurons and acts on organs similar to vertebrate kidneys to mobilize calcium from stored reserves.
Researchers found 'roof drainage' to be the main cause of radioactive cesium flow, with baseflow varying by air temperature. The study provides insights for improving monitoring systems and environmental management.
Scientists have successfully measured ultrafast electric fields using a diamond nonlinear probe, achieving femtosecond temporal and nanometer spatial resolution. This breakthrough enables the detection of local electric field dynamics near surfaces with unprecedented precision.
Genetic analysis reveals clear differentiation between Japanese and Taiwanese hinoki cypress, with divergence occurring 1 million years ago. The study highlights the need for revised classification systems based on genetic regional characteristics to preserve local genetic integrity.
Scientists found that CtBP2 levels decrease with age, but are higher in long-lived individuals. This biomarker may estimate the degree of aging and overall health status.
A new AI-based method optimizes the operation of solar power generation and battery storage systems, reducing imbalance penalties by approximately 47% compared to conventional control methods. The method maintains stable profits throughout the four seasons and can handle real-world uncertainties such as sudden weather changes and compl...
A study analyzing S. macrophylla's natural populations in Kalimantan revealed distinct genetic structures among northeastern, central, and southwestern populations. The ancestral population shows highest genetic diversity and is recommended for conservation as a separate management unit.
Researchers developed DeMemSeg, an AI-driven pipeline that accurately segments overlapping membrane structures with accuracy comparable to expert manual analysis. The approach enables large-scale, objective, and quantitative analysis of morphological data, providing a foundational technology for advancing disease mechanisms.
Researchers at University of Tsukuba predicted the intensity of 21-cm radio signal in different dark matter models using numerical simulations. The results imply hydrogen gas produced a characteristic signal that could reveal dark matter mass and velocity if detected globally.
Scientists at the University of Tsukuba have created a novel method to control Faraday rotation in conductive polymers by modulating polarons through electrochemistry and magnetic fields. This breakthrough has promising applications in magnetic field sensors and optical communication devices.
Researchers analyzed eye-tracking data to identify key factors influencing word processing during English reading. Word length was found to be the most critical factor in determining skipped words and total reading time, while word frequency and predictability played a significant role in initial processing and rereading.
A nationwide survey of 20,000 people found that those who changed jobs in the past year reported higher rates of health symptoms. Job changers often experience more stress factors, such as late-night shifts and excessive workloads, which can negatively impact mental and physical health.
Researchers investigated the luminescence characteristics of Eu-doped CaF₂ crystals under alpha and X-ray irradiation. They found that the ratio of Eu²⁺-induced emission to Eu³⁺-induced emission varies depending on the radiation type, with differences in light color potentially used to identify radiation types.
A study on Aspergillus oryzae found that increased cell volume and nuclear number contribute to its high enzyme production capacity. The fungus's hyphae thicken, resulting in a tenfold increase in cell volume, while the number of nuclei per hyphal cell also rises tenfold.
Researchers mapped bacterial growth in 195 environments, revealing consistent links between growth patterns and ecological traits like habitat and distribution. The study's findings suggest that controlled experiments can uncover mechanisms of ecological and evolutionary adaptation.
Researchers found that large MAF family transcription factors can reactivate the dormant 'Type IIb fast-twitch program' in human muscle, leading to improved glycolytic capacity and increased exercise capacity. Athletes with higher expression levels of these factors had faster and more powerful movements.
Researchers identified Phaedra1 as a gene essential for stress-induced cell death in Drosophila melanogaster. The mTOR-Zeste-Phae1 pathway controls lethal stress-dependent individual death. Suppressing this pathway increases survival rates after exposure to lethal stress.
Researchers at the University of Tsukuba found that 2023 marine heatwaves significantly exacerbated the record-breaking East Asian summer heatwave. The study revealed that changes in cloud cover and water vapor enhanced solar radiation reaching the ground, amplifying surface temperatures.
Researchers analyzed over 50,000 barrage comments from a promotional video on Chinese platform Bilibili, finding a clear link between positive emotional comments and purchasing intent. The study also observed real-time emotional contagion and nuanced dynamics in viewer behavior.
A novel drug target, CD300a, has been identified to suppress immune cell activation and prevent chronic heart and kidney failure after acute tissue injury. The treatment preserves cardiac function and reduces renal fibrosis in mice with genetic deficiency of CD300a.
Using advanced microscopy and molecular biology, researchers visualized axis reconstruction in sea urchin embryos, tracking cellular movements and gene activation to understand self-organizing ability. This discovery sheds light on the long-standing question of monozygotic twinning emergence from one fertilized egg.
This study reveals that GPNMB modifies the tumor microenvironment by repurposing macrophages into immunosuppressive tumor-associated macrophages. The interaction between GPNMB and Siglec-9 enables this reprogramming, leading to increased cancer cell motility and invasiveness.
The percentage of births via cesarean section increased from 20.27% before the COVID-19 pandemic to 21.19% during the pandemic, peaking at 22.14% during the sixth wave.
Researchers found that immature neutrophils migrate into inflamed tissues upon stimulation by interferon-γ, suppressing inflammation and reducing tissue damage. In humans, these cells also produce interleukin-10, which increases in the blood of COVID-19 patients.
The study reveals data visualization primarily facilitates decision-making at the organizational and community levels, particularly for semi-structured problems. Recent trends indicate increasing support for broader types of decision-making, including individual-level and unstructured problems.
Researchers transformed commercially available pencil lead into a graphene-based electron beam source, achieving stable and high-quality electron emission. The findings confirm that graphene edges can be easily derived from readily accessible materials and effectively function as high-performance field emission sources.
Researchers developed a machine learning model that accounts for biological variability to identify optimal formulations for serum-free culture media. The model achieved approximately 1.6-fold higher cell density compared to commercially available products.
The study found that bird species richness declined on nearly all Izu Islands, resulting in a degradation of bird communities. The degradation is likely due to direct predation and reduced food resources caused by introduced Japanese weasels.
A study analyzing genome data from teak trees found correlations between temperature and DNA sites, indicating adaptability to rising temperatures. The population in southern India demonstrated high adaptability, essential for effective management of genetic resources and resilient planting strategies.
Researchers developed a novel framework using generative AI and musculoskeletal simulation to create synthetic gait data. This approach enables more robust and generalizable gait analysis across various patient populations and clinical environments.
Researchers analyzed 180-degree directional changes in soccer ball-trapping to identify key factors influencing performance. Advanced players executed trapping actions with greater accuracy, absorbing momentum more effectively and rotating their bodies towards intended movement directions.
A study found that prolonged sitting decreases cutaneous vasodilatory function under both constant and alternating temperature conditions. Alternating exposure to cooling and heating did not significantly suppress these changes.