National Institute of Advanced Industrial Science and Technology

Secondary Fragmentation of Benzylpyridinium Thermometer Ions Bearing a 4-Trifluoromethyl Group Extends the Internal Energy Calibration Range of Gas-Phase Ions

Abstract Secondary fragmentation of substituted benzylpyridinium “thermometer ions” has been observed previously, but they have not been used as quantitative probes for internal energy calibration. Here, we demonstrate that the secondary fragmentation of 4-trifluoromethyl-substit...

Thermally Tuned Acceleration of Photoinduced Crawling Motion in Azobenzene Crystals and Enhanced Particle Transport

Abstract Mechanically responsive organic crystals are attracting increasing attention as soft actuators. However, precise control over the velocity of their continuous translational motion remains a challenge. Crystals of trans-3,3′-dimethylazobenzene (DMAB) exhibit continuous cr...

Cytochrome c is Highly Compact upon Transfer into the Gas Phase from Strong Acids as Revealed by High-Pressure ESI Ion Mobility-Mass Spectrometry

Abstract A substantial increase in the acidity of the protein solution (e.g., from pH 2 to pH 1) is known to induce the compaction of fully unfolded proteins, such as cytochrome c, into a non-native yet highly compact molten globule state, referred to as the A-state. In this stud...

Olivine-hosted melt inclusions provide insights into primitive magma compositions driving young eruptions from Red Crater, Tongariro (New Zealand)

Abstract Volcanism at continental arcs is ultimately driven by mantle-derived magmas; however, erupted compositions are typically overprinted by crustal interactions during ascent, obscuring deeper signatures. We target olivine and their melt inclusions (MI) in basaltic andesite...

Cyclodextrin-enabled δ-Tocotrienol for Treating Stress and Memory Dysfunction: Molecular Insights, Biotechnological Applications and Biomanufacturing Implications

Background Antioxidants possess substantial health benefits owing to their ability to alleviate cellular oxidative stress, reactive oxygen species generation and inflammation. Vitamins, dietary fatty acids, minerals, micronutrients and plant-derived flavonoids have attracted sign...

Defect-induced recombination analysis in 4H-SiC epitaxial layers based on detailed microwave photoconductive decay curve evaluation

Evaluation of defect-related carrier lifetimes in 4H-SiC epitaxial layers is essential for assessing material quality and device performance. The microwave photoconductive decay (μ-PCD) method is widely used for wafer-level lifetime characterization; however, conventional evaluat...

Temperature Dependence of Broadband Seismometer Sensitivity

ABSTRACT Broadband seismometers are widely used in global observation networks deployed for geophysics research. Recently, the calibration of their sensitivity has become an important factor for ensuring observation accuracy. One of the limiting factors of calibration uncertainty...

Characterization of Formation Deformation during Production Test from Gas Hydrate in Alaska: A Distributed Fiber Optic Sensing Approach

Abstract Reliable monitoring of geomechanical responses is essential for the safe and sustainable production of gas hydrate reservoirs. This study reports the first field-scale application of distributed strain sensing (DSS) during a 10 month extended gas production test on Alask...

Crosslinker-Free Polyacrylamide Hydrogels Exhibit High Strength, Fracture Resistance, and Reprocessability

Abstract Polyacrylamide (PAAm) hydrogels are commonly prepared by incorporating covalent crosslinkers to establish a stable network structure. Here, we report crosslinker-free, high-water-content (>93%) PAAm single-network hydrogels that exhibit unexpectedly high mechanical perfo...

Collagen-mediated biofilm formation and fibrillar organization in Staphylococcus epidermidis

The symbiotic skin bacterium Staphylococcus epidermidis moisturizes human skin, contributes to protection against external pathogens, and supports innate immune stimulation. However, the interaction between collagen, a major skin protein, and S. epidermidis remains insufficiently...

Replanning human–robot collaborative tasks with vision–language models via semantic and physical dual–correction

Human–robot collaborative assembly requires robots to interpret ambiguous corrective instructions while producing physically executable motions. Vision–language models (VLMs) provide semantic reasoning but may select logically inconsistent targets or misjudge execution outcomes....

Multiphysical Responses of a Gas Hydrate Reservoir to Extended-Duration Gas Production on the Alaska North Slope

Abstract The field test of extended-duration gas production from a gas hydrate-bearing reservoir via depressurization─formally titled the JOGMEC–DOE–USGS Collaborative Gas Hydrate R&D Project in Alaska─was conducted in the Prudhoe Bay Unit on the Alaska North Slope during 2023–20...

Compositional Uniformity and Thermal Properties of Tetra- N -butyl Ammonium Bromide and Tetra- N -butyl Ammonium Chloride Mixed Semiclathrate Hydrates

Abstract Mixed semiclathrate hydrates (SCHs) incorporating various guest molecules exhibit high latent heat and allow precise control of the melting temperatures, making them promising materials for cold energy storage applications. The compositional uniformity and thermal proper...

Alaska North Slope HYDRATE 02 Geo Data Well (GDW) Downhole Logging, Pressure Coring, and Completion Operations and Data

Abstract The “Collaborative Gas Hydrate R&D Project in Alaska,” led by the Japan Organization for Metals and Energy Security (JOGMEC), the U.S. Department of Energy (DOE), and the U.S. Geological Survey, aims to examine and assess gas hydrate reservoir systems, their production b...

Production of Secondary Microbial Methane from a Gas Hydrate-Bearing Reservoir at the HYDRATE P1 Production Test Well (PTW-1) on the Alaskan North Slope

Abstract Gas hydrate in the Alaskan North Slope (ANS) is believed to contain as much methane as the known conventional gas accumulations in the Prudhoe Bay field. The JOGMEC-DOE-USGS Collaborative Gas Hydrate R&D Project conducted an extended-duration production test from the sub...

Investigation of FBG Accelerometers and Load Sensors for Vibration Analysis and Slip Detection in Robotic Manipulators

This paper presents an investigation of the viability of Fiber Bragg Grating (FBG) accelerometers and load sensors for two diagnostic tasks in robotics: vibration analysis of industrial manipulators and slip detection in robotic grippers. The study synthesizes experimental result...

From Instruction to Inheritance: Scaling Robot Learning Through Knowledge Circulation

Robot learning, particularly through vision–language–action (VLA) models, has rapidly improved the ability of robots to execute instructed tasks. However, the current mainstream paradigm of robot learning largely depends on one‐way instruction from humans to robots, lacking a cyc...

Protein–protein interaction network-based evaluation of lung cancer relevance and hub gene identification from in vitro crocidolite exposure signatures

Abstract Objectives This study evaluated whether a protein–protein interaction (PPI) network-based approach can link in vitro exposure-induced gene expression signatures to human disease modules. Methods Crocidolite, a well-established lung carcinogen, was used as a model of inha...

Complete genome sequence of Helicobacter pylori strain NY43 harboring bacteriophage KHP30

ABSTRACT The Helicobacter pylori NY43 strain spontaneously releases the bacteriophage (phage) KHP30. Here, we report the complete genome sequence of H. pylori NY43. In addition to the chromosome of H. pylori NY43, we successfully obtained the complete sequence of the episomal pro...

Stress field estimation and evaluation in eastern Hokkaido, northernmost Japan

In eastern Hokkaido, a volcanic front extends in the northeast–southwest direction, and small eruptions have occurred in recent years. Although eastern Hokkaido is a low-seismicity region, we estimated the stress field using a larger dataset than those employed previously to unde...