Masahiro Uchida

Development of a novel high-pressure well-stirred turbulent combustor for kinetic studies at gas turbine conditions

Kaii Ri, Bowen Mei, Andy Thawko, Jan M. Cluse et autres

A novel autoignition-assisted, high-temperature High-Pressure Well-Stirred Turbulent Combustor (HP-WSTC) has been developed for detailed kinetic studies of fuels under gas-turbine conditions that were difficult to obtain with conventional reactors and flame chemistry facilities. It is designed for operations at 1–20 atm, 1200–2200 …

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Urinary isoflavone concentrations and semen parameters of Japanese men seeking fertility treatment

Shoko Konishi, Yuki Mizuno, K. Yamasaki, Masahiro Uchida et autres

This study aimed to analyze the associations between urinary genistein, daidzein, and equol concentrations and semen parameters in Japanese men exposed to high levels of isoflavone in their diet. Between September 2020 and March 2021, men seeking fertility treatment (n = 157) …

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Step‐by‐step: A traction‐based fenestration method for vasoepididymostomy

Kosuke Kojo, Masahiro Uchida, K. Yamasaki, Jaejeong Kim et autres

I G U R E 1 (a) Step 1. Two double-armed sutures are placed through the exposed epididymal tubule (arrow), with a separate traction suture passed between them.(b) Step 2. While gently lifting the traction suture, ophthalmic scissors are used to excise …

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Paleolithic seafaring in East Asia: An experimental test of the dugout canoe hypothesis

Yousuke Kaifu, Chih-Hsing Lin, Nobuyuki Ikeya, Masahisa Yamada et autres

across the oceans began about 50,000 years ago in the Western Pacific, yet how this was achieved remains unclear. The Ryukyu Islands in southwestern Japan, where archaeological sites suddenly appeared 35,000 to 30,000 years ago, are of particular interest in this regard …

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Associations between urinary phthalate metabolite mixtures, semen quality, and serum reproductive hormone levels in Japanese men seeking fertility treatment

Yuki Mizuno, K. Yamasaki, Masahiro Uchida, Teruaki Iwamoto et autres

Phthalate mixtures may adversely affect men's reproductive functioning. This study aimed to analyze the association between exposure to phthalate mixtures, semen quality, and reproductive hormone concentrations in Japanese men seeking fertility treatment. This cross-sectional study analyzed data from 197 Japanese adult males …

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Association of the Ratio of Second to Fourth Digit Length and Phthalate Exposure With Sexual Function in Japanese Men Seeking Fertility Treatment

K. Yamasaki, Masahiro Uchida, Yuki Mizuno, Teruaki Iwamoto et autres

Sexual dysfunction, which is increasingly recognized as a cause of male infertility, may be influenced by environmental factors such as phthalic acid diesters (phthalates) and prenatal androgen exposure. This study aimed to investigate the association between male sexual function and recent exposure …

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Lifelong Sustainable Inquiry-Based Community Learning (LSiCL) Based on Eduinformatics

Kunihiko Takamatsu, Sayaka Matsumoto, Yumi Ishige, Shimpei Matsumoto et autres

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Visualization of liquid ammonia spray using 2p-SLIPI and comparison of liquid ammonia spray and gaseous ammonia combustion in a swirl combustor at atmospheric pressure

Hirofumi Yamashita, Akihiro Hayakawa, Kohei Oku, Sophie Colson et autres

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Optimum primary equivalence ratio for rich-lean two-stage combustion of non-premixed ammonia/methane/air and ammonia/hydrogen/air flames in a swirling flow

Hirofumi Yamashita, Akihiro Hayakawa, Ekenechukwu Chijioke Okafor, Sophie Colson et autres

Rich-lean two-stage combustion concept was proposed for reducing emissions from ammonia-fueled gas turbine combustors. The primary combustion zone should be maintained at an optimum primary equivalence ratio for the simultaneous reduction of NO and unburned NH 3 ; however, the optimum primary …

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A new clustering model based on the seminal plasma/serum ratios of multiple trace element concentrations in male patients with subfertility

Takazo Tanaka, Kosuke Kojo, Yoshiyuki Nagumo, Atsushi Ikeda et autres

Abstract Purpose To investigate whether seminal plasma (SP)/serum ratios of multiple trace elements (TEs) can classify patients with male subfertility. Methods SP/serum ratios of 20 TEs (lithium, sodium, magnesium, phosphorus, sulfur, potassium, calcium, manganese, iron, cobalt, copper, zinc, arsenic, selenium, rubidium, strontium, …

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Association between Sperm Mitochondrial DNA Copy Number and Concentrations of Urinary Cadmium and Selenium

Cindy Rahman Aisyah, Yuki Mizuno, Momoka Masuda, Teruaki Iwamoto et autres

Elevated sperm mitochondrial DNA copy number (mtDNAcn) is associated with damage to sperm and poorer measures of semen quality. Exposure to cadmium (Cd) can increase oxidative stress and damage sperm mitochondria. The adverse effects of Cd can potentially be reduced by sufficient …

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Associations of Sperm Mitochondrial DNA Copy Number with Concentrations of Urinary Cadmium and Selenium

Cindy Rahman Aisyah, Yuki Mizuno, Momoka Masuda, Teruaki Iwamoto et autres

Abstract Elevated sperm mitochondrial DNA copy number (mtDNAcn) is associated with damage to sperm and poorer measures of semen quality. Exposure to cadmium (Cd) can increase oxidative stress and damage sperm mitochondria. The adverse effects of Cd can potentially be reduced by …

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