Takashi Ohyama

ORCID: 0000-0003-4416-9783
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Semiconductor Quantum Structures and Devices
  • RNA and protein synthesis mechanisms
  • Quantum and electron transport phenomena
  • Dental Implant Techniques and Outcomes
  • DNA and Nucleic Acid Chemistry
  • Temporomandibular Joint Disorders
  • Dental materials and restorations
  • Genomics and Chromatin Dynamics
  • Physics of Superconductivity and Magnetism
  • Vehicular Ad Hoc Networks (VANETs)
  • Cleft Lip and Palate Research
  • Bacterial Genetics and Biotechnology
  • Orthodontics and Dentofacial Orthopedics
  • Advanced Semiconductor Detectors and Materials
  • Silicon and Solar Cell Technologies
  • Bacteriophages and microbial interactions
  • Dental Trauma and Treatments
  • Semiconductor materials and interfaces
  • RNA Research and Splicing
  • Advanced Chemical Physics Studies
  • Craniofacial Disorders and Treatments
  • Superconducting Materials and Applications
  • Advanced biosensing and bioanalysis techniques
  • Plant Molecular Biology Research
  • Mobile Ad Hoc Networks

Waseda University
2014-2024

Tokyo Medical and Dental University
2002-2022

Tsurumi University
1975-2021

Tokyo Dental College
1999-2019

Nagasaki University
2017

Shirasagi Hospital
2016-2017

Nagoya University
1978-2014

Bioscience (China)
2014

Food Research Institute
2006-2013

Kyoto Sangyo University
2013

summary The aim of this study was to develop an objective evaluation system for the masticatory function. This used paraffin wax cubes as a test food, which had six red‐ and green‐coloured layers so that each surfaces showed pseudo‐checkered pattern. A total 100 were chewed by 37 subjects images these samples captured analysed using digital image analyzer. With regard colour shape sample, five parameters obtained. Furthermore, independent examiner graded degree mixing in into three groups...

10.1046/j.1365-2842.2003.01049.x article EN Journal of Oral Rehabilitation 2002-12-17

1. To determine the effects of motor activity in jaw on more general behavior, we examined modulation soleus H reflex association with voluntary clenching teeth healthy adult volunteers. 2. The amplitude increased remarkably during clenching. increase maximal was greater than that induced either by isometric contraction wrist extensors or fists. 3. showed a positive correlation strength clenching, as monitored recording electromyographic (EMG) from masseter muscle. 4. associated started...

10.1152/jn.1996.76.3.2033 article EN Journal of Neurophysiology 1996-09-01

summary The objective of the study was to assess validity and reliability a newly developed method for evaluating mixing ability masticatory function. A two‐coloured paraffin wax cube used as test food in test. Eleven full dentate 33 denture wearers participated assessment. They were divided into three groups according their dental state. Validity assessed by Spearman's coefficient correlations between sieving ‘gold standard’ performance. subjects asked masticate foods 5, 7, 10, 15, 20 30...

10.1046/j.1365-2842.2003.01050.x article EN Journal of Oral Rehabilitation 2003-01-17

Some dental implants are coated with hydroxyapatite (HA), which preferentially binds to bone. Several matrix proteins have an arginine-glycine-aspartic acid (RGD) sequence where cells attach via integrin receptor. We hypothesized that coating HA surface RGD-containing peptide might enhance the attachment and differentiation of osteoblasts. The disks (diameter 34 mm, thickness 1 mm) were treated a solution (50 mM Tris/HCl 150 NaCl, pH 7.4) containing EEEEEEEPRGDT, in E repetition exerts high...

10.1002/jbm.10338 article EN Journal of Biomedical Materials Research 2002-08-02

An in vivo gene transfer technique for living mouse testes was used to develop a novel transient expression assay system transcriptional regulatory elements of spermatogenic specific genes. The combination DNA injection into seminiferous tubules and subsequent electroporation resulted an efficient convenient during spermatogenesis. the firefly luciferase reporting driven by Protamine-1 (Prm-1) enhancer region revealed significant increase activity reporter enzyme. Histochemical studies lacZ...

10.1095/biolreprod59.6.1439 article EN Biology of Reproduction 1998-12-01

A previous study has demonstrated that the soleus H reflex is facilitated in association with voluntary teeth clenching proportion biting force humans. The present tried to elucidate functional significance of this facilitation reflex, by examining 1) whether reciprocal or nonreciprocal between ankle extensors and flexors 2) Ia inhibition crural muscles depressed clenching. pretibial was evoked stimulation common peroneal nerve seven healthy subjects no oral dysfunction. a force-dependent...

10.1152/jn.2000.83.4.2063 article EN Journal of Neurophysiology 2000-04-01

summary The purpose of this study was to evaluate the stress distribution under various loading conditions within posterior all‐ceramic crowns. A three‐dimensional finite element model representing a lower first molar constructed. Variations had two types single layer crowns (Dicor and Empress) double (In‐Ceram Empress2) cemented. load 600 N, simulating maximum bite force, applied vertically Loads 225 masticatory were from three directions (vertically, at 45° angle, horizontally). In test...

10.1046/j.1365-2842.2003.01123.x article EN Journal of Oral Rehabilitation 2003-07-25

Enamel matrix derivative (EMD) has been clinically used to promote periodontal tissue regeneration. The purpose of the present study is clarify EMD affects on osteoblastic cells and bone regeneration.Mouse (ST2 KUSA/A1 cells) are in culture experiments. After were treated with EMD, cell growth was evaluated DNA measurement, 5-bromo-2'-deoxyurydine (BrdU) incorporation assay. Measurement alkaline phosphatase (ALP) activity mineralized-nodule (MN) formation, Northern blotting analysis...

10.1034/j.1600-0765.2003.00667.x article EN Journal of Periodontal Research 2003-04-30

Some proteins have the property of self-assembly, known to be an important mechanism in constructing supramolecular architectures for cellular functions. However, as yet, ability double-stranded (ds) DNA molecules self-assemble has not been established. Here we report that dsDNA also a self-assembly aqueous solutions containing physiological concentrations Mg2+. We show preferentially interact with identical sequence and length even solution composed heterogeneous species. Curved unusual...

10.1021/bi061539y article EN Biochemistry 2006-12-15

Self-assembly is the autonomous organization of constituents into higher order structures or assemblages and a fundamental mechanism in biological systems. There has been an unfounded idea that self-assembly may be used sensing pairing homologous chromosomes chromatin, including meiotic chromosome pairing, polytene formation Diptera transvection. Recent studies proved double-stranded DNA molecules have sequence-sensing property can self-assemble, which play role above phenomena. However, to...

10.1093/nar/gks1269 article EN cc-by-nc Nucleic Acids Research 2012-12-18

Summary The aim of this study was to compare objective and subjective hardness selected common foods with a wax cube used as test item in mixing ability test. Objective determined for 11 (cream cheese, boiled fish paste, beef, apple, raw carrot, peanut, soft/hard rice cracker, jelly, plain chocolate chewing gum) the cube. Peak force (N) compress each obtained from force–time curves generated Tensipresser. Perceived ratings were made by 30 dentate subjects (mean age 26·9 years) using visual...

10.1111/j.1365-2842.2006.01645.x article EN Journal of Oral Rehabilitation 2007-02-12
Coming Soon ...