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Diarylaminophenyl-substituted bianthracene derivatives for blue organic light-emitting diodes
Kang, Jisu,Kim, Dong Young,Lee, Song Eun,Kim, Young Kwan,Yoon, Seung Soo Informa UK (TaylorFrancis) 2017 Molecular Crystals and Liquid Crystals Vol.651 No.1
<P>In this study, we designed and synthesized blue emitting materials based on diarylaminophenyl-substituted bianthracene derivatives. Organic Light Emitting-Diodes (OLEDs) devices using these materials were fabricated in the following sequence; indium-tin-oxide (ITO) / N,N'-diphenyl-N,N'-(2-napthyl)-(1,1-phenyl)-4,4-diamine (NPB) (50nm) / Blue materials 1 and 2 (30nm) / 4,7-diphenyl-1,10-phenanthroline (BPhen) (30nm) / lithium quinolate (Liq) (2nm) / Al (100nm). These devices showed efficient blue emissions. In particular, a device using compound 2 as blue emitter showed luminous efficiency, power efficiency, and external quantum efficiency of 2.47 cd/A, 1.16lm/W, 2.45% at 20mA/cm(2), respectively, with Commission Internationale d'Enclairage (CIE) coordinates of (0.18, 0.25) at 8.0V.</P>
Effect of black chokeberry on skeletal muscle damage and neuronal cell death
( Jisu Kim ),( Kang Pa Lee ),( Suji Beak ),( Hye Ra Kang ),( Yong Kyun Kim ),( Kiwon Lim ) 한국운동영양학회 2019 Physical Activity and Nutrition (Phys Act Nutr) Vol.23 No.4
[Purpose] Numerous epidemiological studies have shown that it is possible to prescribe exercise for neurodegenerative disease, such as Alzheimer's disease and Parkinson’s disease. However, despite the availability of diverse scientific knowledge, the effects of exercise in this regard are still unclear. Therefore, this study attempted to investigate a substance, such as black chokeberry (Aronia melanocapa L.) that could improve the ability of the treatment and enhance the benefits of exercising in neurodegenerative diseases. [Methods] The cell viability was tested with 2,3-bis[2- methyloxy-4-nitro-5-sulfophenyl]-2H-tetrazolim-5- carboxanilide and the cells were stained with ethidium homodimer-1 solution. The mRNA expression levels were evaluated by microarray. The active compounds of black chokeberry ethanolic extract (BCE) were analyzed by gas chromatography. The chemical shift analysis in the brain was performed using magnetic resonance spectroscopy. [Results] BCE treatment decreased hydrogen peroxide-induced L6 cell death and beta amyloid induced primary neuronal cell death. Furthermore, BCE treatment significantly reduced the mRNA levels of the inflammatory factors, such as IL-1α, Cxcl13, IL36rn, Itgb2, Epha2, Slamf8, Itgb6, Kdm6b, Acvr1, Cd6, Adora3, Cd27, Gata3, Tnfrsf25, Cd40lg, Clec10a, and Slc11a1, in the primary neuronal cells. Next, we identified 16 active compounds from BCE, including D-mannitol. In vivo, BCE (administered orally at a dosage of 50 mg/ kg) significantly regulated chemical shift in the brain. [Conclusion] Our findings suggest that BCE can serve as a candidate for neurodegenerative disease therapy owing to its cyto-protective and anti-inflammatory effects. Therefore, BCE treatment is expected to prevent damage to the muscles and neurons of the athletes who continue high intensity exercise. In future studies, it would be necessary to elucidate the effects of combined BCE intake and exercise.
Impact of clay minerals on bacterial diversity during the fermentation process of kimchi
Kang, Jisu,Chung, Won-Hyong,Nam, Young-Do,Kim, Daeyoung,Seo, Sung Man,Lim, Seong-Il,Lee, So-Young Elsevier 2018 Applied clay science Vol.154 No.-
<P><B>Abstract</B></P> <P>Kimchi is a popular traditional Korean food and has various beneficial health properties, e.g., it has preventative effects against cancer, obesity, diabetes, and constipation. The characteristics of kimchi, including its texture, flavor, and functionality, are affected by the major and minor ingredients. Bentonite, a clay mineral, is used as a component in functional foods, cosmetics, and pharmaceuticals owing to its physical and chemical characteristics. In this study, different types of cation-substituted forms of bentonite (Na<SUP>+</SUP>, K<SUP>+</SUP> and Mg<SUP>2+</SUP>) were used as kimchi ingredients to analyze their effect on the microbial community during fermentation for 10days. Amplicon sequencing targeting the bacterial 16S rRNA gene was conducted using the ion torrent PGM system and sequencing data were analyzed with Qiime. At the initial stage, kimchi samples exhibited diverse microflora. Lactic acid bacteria (LAB), such as <I>Weissella, Lactobacillus</I>, and <I>Lactococcus</I>, dominated after 10days of fermentation. Seven core LAB species, i.e., <I>Leuconostoc gelidum</I>, <I>Leuconostoc gasicomitatum</I>, <I>Weissella koreensis</I>, <I>Leuconostoc citreum</I>, <I>Leuconostoc lactis</I>, <I>Lactobacillus sakei</I>, and <I>Weissella cibaria</I>, showed differences in abundance among samples treated with different types of bentonite.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The effects of bentonite, a clay mineral, on kimchi properties were examined. </LI> <LI> Kimchi was treated with 6 bentonite types modified with different cations. </LI> <LI> The kimchi microflora was dominated by LAB after a 10-day fermentation. </LI> <LI> Seven LAB species differed according to the cation-substituted form of bentonite. </LI> </UL> </P>
Kang Jisu,Lee Joon-Hyop,Kim Yun Yeong,Chun Yong Soon,Park Heung Kyu,Chung Yoo Seung 대한내분비외과학회 2023 The Koreran journal of Endocrine Surgery Vol.23 No.2
Purpose: Robotic bilateral axillo-breast approach (BABA) thyroidectomy has been performed over 10 years in Korea. Compared with conventional open thyroidectomy, BABA has been shown to be not inferior when implemented in selected cases, and it has been associated with favorable cosmetic outcomes. This study aimed to evaluate our initial experiences with robotic BABA thyroidectomy (starting in 2020) and to share our lessons and perspectives with other surgeons. Methods: We retrospectively reviewed 237 cases of robotic BABA thyroidectomy between January 2020 and June 2022 at Gachon University Gil Medical Center in Incheon, Korea. The operations were divided into 3 equal-sized groups according to chronological sequence. Results: Mean age of the patients was 45.4 years and female patients was 82.7%. The mean body mass index was 24.54±3.63 kg/m2 . The mean tumor size was 1.33±1.20 cm (range, 0.3–5.7). Total thyroidectomy was performed in 63 cases and completion thyroidectomy was 4 cases. The mean of operation time was 203.56±51.42 minutes and console time was 123.72±46.40 minutes. Malignancy cases were 83.7% and papillary thyroid carcinoma was 93.4% in malignancy. The mean tumor size was 1.07±0.93 cm (range, 0.3–5.7) in malignant cases. According to intervals of surgery along proceeding operation, operation time and console time decreased (P=0.001 and P<0.001, respectively). Postoperative complication such as hypocalcemia and recurrent laryngeal nerve palsy did not show statistically significant difference in three intervals. Conclusion: Robotic BABA thyroidectomy can be applied in the treatment of both benign and malignant thyroid disease, and completion robotic BABA thyroidectomy can also be performed safely