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Article
Open AccessNovel Environmentally Superior Tribomaterial with Superlow Friction: 100% Cellulose Nanofiber Molding
In this paper, we report on a novel, environmentally superior tribomaterial with superlow friction of 100% cellulose nanofiber (CNF) molding. Based on our experimental results, the CNF molding exhibited a supe...
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Article
Concentrated Polymer Brush in Reciprocating Seal Improves Sealing Performance with Low Friction Even for Rough Surfaces and Immiscible Fluids
To achieve both lowering the fluid leakage and lowering the friction loss in a reciprocating seal, the effect of coating a concentrated polymer brush (CPB) onto the rough surfaces of the reciprocating seal was...
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Article
Open AccessProcesses of molecular adsorption and ordering enhanced by mechanical stimuli under high contact pressure
Adsorbed molecular films, referred to as boundary films in tribology, are widely used in various industrial products as a keyway for surface functionalisation, such as lubricity, wettability, and adhesion. Bec...
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Article
Open AccessMechanical activities of self-beating cardiomyocyte aggregates under mechanical compression
Since the discovery of synchronous pulsations in cardiomyocytes (CMs), electrical communication between CMs has been emphasized; however, recent studies suggest the possibility of mechanical communication. Her...
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Article
Durability Improvement of Concentrated Polymer Brushes by Multiscale Texturing
Concentrated polymer brushes (CPBs) are promising soft-material coatings for improving tribological properties under severe sliding conditions, even in the macroscopic scale. Therefore, they are expected to be...
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Chapter and Conference Paper
Suppression of Friction-Induced Vibration in Rotary Sliding System Using Lateral Spin Sliding
A lateral spin sliding was applied orthogonally in the direction of the sliding velocity at a rotary sliding contact in a rotary sliding system. When the velocity of the lateral spin sliding was sufficiently h...
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Article
Polarization Observations of Adsorption Behavior of Fatty Acids Using Optical Anisotropy of Liquid Crystal
Chemical interactions and formation of adsorbed films of additives strongly affect the tribological behavior in boundary lubrication. In order to examine the relationship between the adsorption behavior and fr...
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Article
Complex Impedance Measurement Applied to Short-Time Contact Between Colliding Steel Surfaces
The complex impedance method was developed for measuring the transient behaviors of short-time contacts between colliding steel surfaces, by using an alternating current circuit with a high frequency of 500 kH...
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Article
Minimization of Friction at Various Speeds Using Autonomous Viscosity Control of Nematic Liquid Crystal
To demonstrate the concept of the smart lubrication system using liquid crystal (LC) lubricant proposed by Nakano (Tribol Lett 14:17–24, 2003), the following three types of tests were performed: (1) film thicknes...
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Article
Open AccessNovel Friction Law for the Static Friction Force based on Local Precursor Slip**
The sliding of a solid object on a solid substrate requires a shear force that is larger than the maximum static friction force. It is commonly believed that the maximum static friction force is proportional t...
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Article
Finite Element Analysis of Precursors to Macroscopic Stick–Slip Motion in Elastic Materials: Analysis of Friction Test as a Boundary Value Problem
In this study, we apply the finite element method to investigate precursor to frictional sliding phenomena arising immediately prior to macroscopic stick–slip transitions in elastic bodies within the framework...
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Article
Surface friction of thermoresponsive poly(N-isopropylacrylamide) gels in water
In this paper, we report the experimental results of surface friction between thermoresponsive poly(N-isopropylacrylamide) gels in water. The static friction force was found to depend on the waiting period prior ...
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Article
Precursors of Global Slip in a Longitudinal Line Contact Under Non-Uniform Normal Loading
This article describes the mechanism of precursor events; the mechanism was determined through an experiment and simulation by considering non-uniform normal loading. In the experiment, real-time observations ...
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Article
Relationship Between Tactile Sensation and Friction Signals in Cosmetic Foundation
A tribometer was developed to simulate friction phenomena occurring when human fingers are rubbed together in order to acquire the tactile sensation of applying cosmetic foundation. The tribometer utilizes sil...
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Article
Tributyltin (TBT) increases TNFα mRNA expression and induces apoptosis in the murine macrophage cell line in vitro
Tributyltin (TBT) compounds have been widely used as antifouling agents for shipbottom paint. The immune system is a target of TBT intoxication. We evaluated the effects of TBT chloride in macrophages, which h...
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Article
Effect of tributyltin on the N-methyl-D-aspartate (NMDA) receptors in the mouse brain
The purpose of this study was to determine the effect of tributyltin chloride (TBTCl) on the NMDA receptor by in vitro and in vivo experiments. In the first in vitro experiment, the binding of [3H]MK-801 and of ...
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Article
Visualization of 50 MHz Surface Acoustic Wave Propagation Using Stroboscopic Phase-Shift Interferometry
A Stroboscopic phase-shift interferometry has been developed to visualize surface acoustic wave (SAW) propagation on SAW devices quantitatively. The developed interferometry is a Fizeau-type one with a multi-m...
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Article
Fenestrae in golgi and endoplasmic reticulum cisternae of human brain tumours
Fenestrae were found in freeze-fractured cisternae of the Golgi apparatus and endoplasmic reticulum of glioblastoma, oligodendroglioma, ependymoma, medulloblastoma, medulloepithelioma, meningioma, cerebellar s...
