Japan

Osaka Metropolitan University scientists investigated numerically the interaction between a quantized vortex and a normal-fluid. Based on the experimental results, researchers decided the most consistent of several theoretical models. They found that a model that accounts for changes in the normal-fluid and incorporates more theoretically accurate mutual friction is the most compatible with the experimental results.

Researchers from Osaka University show how their multilegged walking robot can be steered by inducing a dynamic instability. By making the couplings between segments more flexible, the robot changes from walking straight to moving in a curved path. This work can lead to more energy-efficient and reliable robotic navigation of terrain.

A research team, led by researchers from Osaka University, performed genetic screening of fission yeast lacking DNA repair gene Rad51 to identify genes that play a role in gross chromosomal rearrangement (GCR), a type of mutation that occurs at the centromere. Cells lacking Srr1 or Skb1 exhibited reduced GCR, indicating that these genes are important to the occurrence of GCR. These findings advance our understanding of the mechanisms underlying centromeric GCR.

Osaka Metropolitan University scientists found that Japanese and Chinese, who are considered to have high-context cultures with a high degree of reliance on information shared by the speaker and listener, are code-switching from high-context cultures to low-context cultures when communicating with people from each other’s country. Furthermore, the scientists found that the Japanese do not engage in much code-switching with Chinese students in Japan.

Eating fermented foods might be the secret to a healthy and long-lived society

Two key challenges in chemistry innovation are solved simultaneously by exploring chemical opportunities with artificial intelligence.

Acoustic signals can be effectively used for monitoring glacial runoff and provide a cheaper and more accessible alternative to existing methods.

Researchers from the Institute of Industrial Science, The University of Tokyo, discover how certain colloids can form a solid-like gel and reveal how the mechanism differs from glasses.

Researchers at the Institute of Industrial Science, The University of Tokyo, use artificial intelligence to help interpret data generated by material science spectroscopy experiments, which can aid in the development of new drugs and organic conductors.

A research group led by Osaka University has found that plant cells may be able to detect mechanical forces to determine their own position within the leaf—whether they are on the surface or in the inner tissues—and therefore differentiate into appropriate cell types after damage. These findings reveal how plants regenerate the correct type of tissues when damaged, and may improve our understanding of the mechanisms underlying the high regeneration potential of plants.

Researchers have created a genetically edited allergen-free chicken egg that may be safe for those with egg white allergies.

Researchers at Osaka University discovered a new class of photo-responsive crystal compounds, heteroaromatic 1,2-diketones. Certain light irradiation causes the crystals in these materials to melt, dramatically changing the materials’ properties. One member of this class, SO, shows luminescent changes while melting, which enabled the research team to visualize the crystal-melting process at the molecular level. These findings provide fundamental insights into the mechanisms behind crystal melting and will enable future designs of light-responsive materials.

Researchers at Kanazawa University report in Nano Letters how high-speed atomic force microscopy leads to insights into processes relevant to Alzheimer’s disease. Moreover, the technique is shown to be an excellent tool for studying the effect of drugs against the disease.

Researchers at Kanazawa University report in the Proceedings of the National Academy of Sciences of the United States of America (PNAS) high-speed atomic force microscopy experiments that show how ligands associated with stimulating and suppressing activation of the TRPV1 protein increase and decrease the molecule’s structural variations. The observations provide insights into how these heat- and chilli-sensing proteins function.

Specially coated surfaces help scientists investigate what happens when cell clusters are turned upside down.

A new group of mitochondrial viruses confined to the arbuscular mycorrhizal fungi Glomeromycotina may represent an ancestral lineage of mitoviruses.

Kavli IPMU researchers have discovered a new generic production mechanism of gravitational waves generated by a phenomenon known as oscillons.

Researchers from Osaka University identified a new protein, NICOL, and described its crucial role in the maturation of sperm, which itself is necessary for male fertility. Mice who lacked this protein were sterile. Such a discovery may have implications for the development of male contraceptives.

A new drug delivery system delivers an antioxidant directly to mitochondria in the liver, mitigating the effects of oxidative stress.

Adapting a detector developed for space X-ray observation, a team including Kavli IPMU researchers have successfully verify strong-field quantum electrodynamics with exotic atoms.

Osaka Metropolitan University scientists elucidated the molecular structure of anionic Pt(0) complexes for the first time in collaboration with co-researchers at Paul Sabatier University - Toulouse III. The key to success is the stabilization of anionic Pt(0) complexes (which are usually unstable owing to their electron-donating nature) by the electron-accepting properties of boron compounds. The results of this research allow us to elucidate the properties and functions of highly active chemical species and provide new guidelines for their creation. The research is expected to lead to the development of innovative catalytic reactions mediated by these chemical species.

Osaka Metropolitan University scientists investigated the prevalence of antimicrobial resistant bacteria in 678 bacterial isolates from 428 companion dogs and 74 companion cats at the Veterinary Medical Center, Osaka Metropolitan University. Two E. coli strains have both a mobile colistin-resistant mcr gene and a third-generation cephalosporin-resistant blaCTX gene. One of these strains, which is found in a dog, was resistant to both colistin and third-generation cephalosporins.

Atacama Cosmology Telescope (ACT) collaboration researchers including the Kavli IPMU's Toshiya Namikawa have created a new map of dark matter in the universe confirming Einstein's theory of general relativity.

A joint research group at Osaka Metropolitan University has succeeded in regulating the flow of single molecules in solution by opening and closing the nanovalve mounted on the nanofluidic device by applying external pressure. The research group fabricated a device with a ribbon-like, thin, soft glass sheet on the top, and at the bottom a hard glass substrate having nanochannels and nanovalve seats. By applying external pressure to the soft glass sheet to open and close the valve, they succeeded in directly manipulating and controlling the flow of individual molecules in solution. They also observed an effect of fluorescence signal amplification when single fluorescent molecules are confined in the tiny nanospace inside the valve. The effect can be ascribed to the nanoconfinement, which suppresses the random motion of the molecules.

Polycyclic aromatic hydrocarbons, in particular, lower the prognosis of ischemic strokes by causing inflammation in the brain.

Researchers discuss whether a "brain organoid" should be treated as a person by law, and suggest the need for legal and social discussions uncoupled from debates on consciousness.

Allowing the direct observation of biomolecules in dynamic action, high-speed AFM has opened a new avenue to dynamic structural biology. An enormous amount of successful applications within the last 15 years provide unique insights into essential biological processes at the nanoscale – visualizing, for example, how molecular motors execute their specific functions.

To discover and preserve conservation laws in the data of physical phenomena, researchers from Osaka University developed FINDE, which uses a neural network to represent the underlying conservation laws of a system as opposed to its superficial dynamics. Experiments demonstrated that energy and mass conservation laws, spatial symmetries, and constraints were discovered and preserved, indicating the potential of FINDE to contribute to the development of computer-aided engineering and physics simulations.

Researchers at the Institute of Industrial Science, The University of Tokyo, have developed a desktop charger with voltages high enough to replenish the electric charge on N95 and surgical masks, which is required for effective use

An Osaka Metropolitan University scientist published a review article on numerous asymmetric reactions using arynes, organized by style, and detailed their outline and characteristics. Unresolved issues and prospects in this field were also described.