Publications by authors named "Naoto Miyashita"

Objectives: Physical activity management through smartphone applications is increasing worldwide; however, it is unclear whether smartphone users among elderly Japanese individuals with musculoskeletal disorders are less likely to experience “locomotive syndrome” (LoS). We aimed to test the hypothesis that LoS in smartphone users had lower prevalence than that in non-smartphone users among elderly individuals with musculoskeletal disorders. Methods: Elderly participants, aged ≥60 years, who visited the outpatient clinic were enrolled.

View Article and Find Full Text PDF

Recently, quantitative NMR (qNMR), especially H-qNMR, has been widely used to determine the absolute quantitative value of organic molecules. We previously reported an optimal and reproducible sample preparation method for H-qNMR. In the present study, we focused on a P-qNMR absolute determination method.

View Article and Find Full Text PDF

Background: Although the clinical outcomes of manipulation under ultrasound-guided fifth and sixth cervical nerve root block for frozen shoulder have been reported, few studies have focused on the timing of manipulation. This study aimed to determine whether the timing of manipulation impacts the clinical outcomes.

Methods: We retrospectively reviewed the outcomes of 103 frozen shoulder patients (mean age 51.

View Article and Find Full Text PDF
Article Synopsis
  • Quantitative NMR (qNMR) is used to establish the absolute quantitative value of standards for HPLC-based quantification, specifically for hygroscopic substances like saikosaponin a and indocyanine green (ICG).
  • The study highlights the impact of humidity on the purity determination of ICG, noting that non-controlled humidity resulted in higher variation (86.12 ± 2.70%) and residual ethanol in the samples.
  • Using a controlled humidity environment, the purity of ICG decreased variability (84.19 ± 0.47%), and employing a constant temperature and humidity box minimized variation further (82.26 ± 0.19%), suggesting its use for standard reference preparation in JP
View Article and Find Full Text PDF

A highly sensitive determination method for troglitazone stereoisomers was developed by high-performance liquid chromatography with electrochemical detection (HPLC-ECD). The oxidation behavior of troglitazone was investigated for the application of ECD by measuring the cyclic voltammogram. The separation was performed on a semi-micro chiral column (Chiralcel OJ-RH) using a mobile phase consisting of methanol-acetic acid (1000:1, v/v) containing 50mM LiClO4 at a flow rate of 20 microl/min.

View Article and Find Full Text PDF

Determination of catechins in human plasma was carried out by high-performance liquid chromatography with electrochemical detection using a microbore octadecylsilica column. Peak heights for catechins were found to be linearly related to the amount of each catechin injected, from 2 pmol/ml to 2 nmol/ml (r>0.999).

View Article and Find Full Text PDF

Synopsis of recent research by authors named "Naoto Miyashita"

  • - Naoto Miyashita's recent research focuses on the intersection of technology and health, particularly the effects of smartphone usage on elderly individuals with musculoskeletal disorders, indicating a potential reduction in locomotive syndrome prevalence among users compared to non-users.
  • - The author has also contributed to advancements in analytical chemistry by validating quantitative NMR methods for determining the purity of various substances, including cyclophosphamide hydrate and indocyanine green, aimed at improving standardization in pharmaceutical analysis.
  • - Additionally, Miyashita's work extends to clinical studies on frozen shoulder treatment, exploring the impact of timing for ultrasound-guided manipulations on patient outcomes, thereby enhancing therapeutic approaches in orthopedic practices.