Jun Lee

1 week ago | nature.com | Jung Hun Kang |Jun Lee |Dong-gi Lee |Jae Choi |Jun Baek Park |Yeasol Kwon | +2 more

We aimed to evaluate the relationship between serum testosterone levels and kidney stone prevalence in men. We examined cross-sectional data from 3234 men who participated in a health examination (2010–2020). A full metabolic work-up, including serum testosterone levels, was performed. Combined ultrasonography with KUB radiography was used for stone detection. The participants’ median age and testosterone concentration were 53.0 years and 4.7 ng/mL, respectively. A total of 178 men had kidney stones. A cutoff value for determining the presence of kidney stones was a testosterone concentration <3.33 ng/mL ng/mL. After adjusting for confounders, only age and a testosterone concentration <3.33 ng/mL were significantly related to the presence of kidney stones. However, body mass index, blood pressure, triglycerides, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, creatinine, blood urea nitrogen, HbA1c, uric acid, hs-CRP, calcium, aspartate transaminase, alanine aminotransferase, and albumin were not significantly and independently related to kidney stones. The odds ratios (95% confidence intervals) for kidney stones according to age and testosterone concentration <3.33 ng/mL were 1.029 (1.010–1.04) and 1.655 (1.071–2.556), respectively. Our study revealed that the prevalence of kidney stones significantly and independently increased when the serum testosterone was less than 3.33 ng/mL in men.

3 weeks ago | opg.optica.org | Heui Jae Pahk |Young Kim |Jun Lee

We present an angle-resolved channeled spectroscopic micro-ellipsometry (ACSE) system operating in a near-normal-incidence configuration with a line-scan spectrometer. The hardware covers the visible spectral range from 480 to 680 nm and provides incidence angles from 0° to 60°.

1 month ago | mdpi.com | Jun Lee |Jae Kyu Lim |Hyun Lee |Sung Kang

All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.

Dec 25, 2024 | mdpi.com | Jun Lee

1. IntroductionNeuroinflammation is a complex and multifaceted response of the central nervous system (CNS) to injury, infection, or disease [1,2]. Acute neuroinflammation plays a critical role in preserving CNS homeostasis by facilitating pathogen clearance and promoting tissue repair. However, chronic and dysregulated neuroinflammation is progressively recognized as a central driver of neurodegenerative disorders, including Alzheimer’s disease, Parkinson’s disease, and Multiple Sclerosis [1,3,4].

Dec 9, 2024 | pubs.rsc.org | Jun Lee |Jeong-Yeol Yoo |Jong-Kwan Bin

The effect of positional deuterium substitution on the acceptor moiety for TADF† Despite the successful commercialization of organic light-emitting diodes (OLEDs), achieving high efficiency and long lifespan in blue OLEDs often requires device structures that incorporate multiple layers featuring two or more blue-emitting layers, highlighting the ongoing challenge of achieving deep-blue OLEDs with extended lifetime.