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Ok, Kyung-Chul,Lim, Jun-Hyung,Jeong, Hyun-Jun,Lee, Hyun-Mo,Rim, You Seung,Park, Jin-Seong American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.3
<P>Photochemical reactions in inorganic films, which can, be promoted by the addition, of thermal energy, enable significant changes in the properties of films. Metaphase films depend significantly on introducing external energy even at low temperatures.: We performed thermal-induced, deep ultraviolet, based, thermal-photochemical activation of metaphase ZnOxNy films at low temperature, and we observed peculiar-variations, in the nanostructures with phase transformation and densification. The separated; Zn3N2 and ZnO nanocrystalline lattice in amorphous ZnOxNy was-stabilized remarkably by the-reduction Of oxygen defects and IT;the interfacial atomic rearrangement without breaking the N-bonding. On the basis of these approaches, we successfully demonstrated highly flexible, nanocrystalline-ZnOxNy thin-film transistors on polyethylene naphthalate films, and the saturation mobility showed more than 60 cm(2) V-1 s(-1).</P>
Kyung Ha Lee,Hae Jin Jeong,Hee Chang Kang,Jin Hee Ok,Ji Hyun You,Sang Ah Park 한국조류학회I 2019 ALGAE Vol.34 No.3
The dinoflagellate genus Alexandrium is known to often form harmful algal blooms causing human illness and largescale mortality of marine organisms. Therefore, the population dynamics of Alexandrium species are of primary concern to scientists and aquaculture farmers. The growth rate of the Alexandrium species is the most important parameter in prediction models and nutrient conditions are critical parameters affecting the growth of phototrophic species. In Korean coastal waters, Alexandrium affine and Alexandrium fraterculus, of similar sizes, often form red-tide patches together. Thus, to understand bloom dynamics of A. affine and A. fraterculus, growth rates and nitrate uptake of each species as a function of nitrate (NO3) concentration at 100 μmol photons m-2 s-1 under 14-h light : 10-h dark and continuous light conditions were determined using a nutrient repletion method. With increasing NO3 concentration, growth rates and NO3 uptake of A. affine or A. fraterculus increased, but became saturated. Under light : dark conditions, the maximum growth rates of A. affine and A. fraterculus were 0.45 and 0.42 d-1, respectively. However, under continuous light conditions, the maximum growth rate of A. affine slightly increased to 0.46 d-1, but that of A. fraterculus largely decreased. Furthermore, the maximum nitrate uptake of A. affine and A. fraterculus under light : dark conditions were 12.9 and 30.1 pM cell-1 d-1, respectively. The maximum nitrate uptake of A. affine under continuous light conditions was 16.4 pM cell-1 d-1. Thus, A. affine and A. fraterculus have similar maximum growth rates at the given NO3 concentration ranges, but they have different maximum nitrate uptake rates. A. affine may have a higher conversion rate of NO3 to body nitrogen than A. fraterculus. Moreover, a longer exposure time to the light may confer an advantage to A. affine over A. fraterculus.
Kyung Jae Lee,Eell Ryoo,Yoo Min Lee,Jung Min Yoon,Hyo-Jeong Jang,So Yoon Choi,You Jin Choi,Hyun Jin Kim,Ju Young Chung,Jung Ok Shim 대한소화기 기능성질환·운동학회 2022 Journal of Neurogastroenterology and Motility (JNM Vol.28 No.3
Background/AimsThe effects of probiotics in children vary based on diseases and probiotic strains. We aim to investigate the effectiveness of Saccharomyces boulardii and lactulose for treating childhood functional constipation. MethodsThis open-label randomized controlled trial was conducted at 10 university hospitals in Korea. Children who were diagnosed with functional constipation were allocated to 3 groups (lactulose monotherapy, combination therapy, and S. boulardii monotherapy). The primary outcome was treatment success rate that was accordingly defined as ≥ 3 bowel movements without incontinence at week 12. The cumulative successful maintenance and drug maintenance rates without drug changes were calculated throughout the study period. We compared stool frequency, incontinence, consistency, and painful defecation at week 2 among the 3 groups. ResultsOverall, 187 children were assigned to the lactulose monotherapy (n = 69), combination therapy (n = 68), or S. boulardii monotherapy (n = 50) groups. The primary outcome was significantly higher in the lactulose monotherapy group (26.1%) or combination therapy group (41.2%) than in the S. boulardii monotherapy group (8.0%). The S. boulardii monotherapy group showed a significantly lower cumulative successful maintenance and drug maintenance rate than the other 2 groups. There were no significant intergroup differences in the frequency of defecation, incontinence, painful defecation, or stool consistency during the follow-up at week 2. ConclusionS. boulardii monotherapy was not superior to lactulose monotherapy or combination therapy and showed a higher drug change rate, supporting the current recommendation of probiotics in the treatment of childhood functional constipation.
Silibinin Inhibits LPS-Induced Macrophage Activation by Blocking p38 MAPK in RAW 264.7 Cells
( Cha Kyung Youn ),( Seon Joo Park ),( Min Young Lee ),( Man Jin Cha ),( Ok Hyeun Kim ),( Ho Jin You ),( In Youp Chang ),( Sang Pil Yoon ),( Young Jin Jeon ) 한국응용약물학회 2013 Biomolecules & Therapeutics(구 응용약물학회지) Vol.21 No.4
We demonstrate herein that silibinin, a polyphenolic fl avonoid compound isolated from milk thistle (Silybum marianum), inhibits LPS-induced activation of macrophages and production of nitric oxide (NO) in RAW 264.7 cells. Western blot analysis showed silibinin inhibits iNOS gene expression. RT-PCR showed that silibinin inhibits iNOS, TNF-α, and IL1β. We also showed that silibinin strongly inhibits p38 MAPK phosphorylation, whereas the ERK1/2 and JNK pathways are not inhibited. The p38 MAPK inhibitor abrogated the LPS-induced nitrite production, whereas the MEK-1 inhibitor did not affect the nitrite production. A molecular modeling study proposed a binding pose for silibinin targeting the ATP binding site of p38 MAPK (1OUK). Collectively, this series of experiments indicates that silibinin inhibits macrophage activation by blocking p38 MAPK signaling.
Kim, Ok-Kyung,Lee, Minhee,Kwon, Han Ol,Lee, Dasom,Park, Jeongjin,Kim, Eungpil,You, Yanghee,Lim, Young Tae,Jun, Woojin,Lee, Jeongmin S. Karger AG 2018 Skin pharmacology and physiology Vol.31 No.4
<P>We investigated the potential effects of<I> Costaria costata</I><B><I></I></B> (CC) on atopic dermatitis (AD) development in chloro-2,4-dinitrobenzene (DNCB)-treated NC/Nga mice. CC is a brown alga distributed across the seas of Korea, China, and Japan. A total of 40 mice were randomly assigned to 5 groups with 8 mice per group: untreated Balb/c mice, AD control (0.1% w/v DNCB-treated NC/Nga mice), positive control (i.e., DNCB-treated NC/Nga mice fed a dietary supplement of 66.6 mg/kg of body weight [b.w.] of CJLP133), DNCB-treated NC/Nga mice fed a dietary supplement of 100 mg/kg b.w. of CCE10 (CCE10 100), and DNCB-treated mice fed a dietary supplement of 300 mg/kg b.w. of CCE10 (CCE10 300) groups. The CCE10 100 and CCE10 300 treatment groups suppressed AD development including clinical and histopathological changes and a reduction in skin hydration induced by DNCB. In addition, Th2 cytokine production in primary splenocytes, serum IgE and histamine production, and mast cell infiltration into the skin were suppressed in the CCE10 300 mice compared to the CCE10 100 mice. Our finding demonstrated an inhibitory effect of CCE10 in AD development by means of improving the Th1/Th2 cytokine balance and anti-inflammatory effect in an in vivo model.</P>
한국인 갑상선 유두상암종 환자에서 XPC-PAT 유전자 다형
안유헌(You Hern Ahn),이형석(Hyung Seok Lee),이용섭(Yong Seop Lee),김희옥(Hee Ok Kim),이근영(Keun Young Lee),태경(Kyung Tae) 대한두경부종양학회 2006 대한두경부 종양학회지 Vol.22 No.2
Background and Objectives :Thyroid carcinoma is the sixth commonest cancer in Korea and the papillary carcinoma is the most common type(88%) of the malignant thyroid tumors. Bulky DNA adducts formed by the carcinogens are repaired by DNA repair process, but failure to repair this DNA damage can cause mutations in oncogenes and tumor suppressor genes resulting in tumor formation. The xeroderma pigmentosum group C ( XPC ) gene is essential for this repair procedure and the XPC-PolyAT ( PAT ) polymorphisms may alter DNA repair capacity(DRC) and genetic susceptibility to cancer. Subjects and Methods :In a case-control study of 113 Korean patients with pathologically diagnosed thyroid papillary carcinoma and 65 control subjects, we investigated the association between the three XPC-PAT gene polymorphisms and thyroid papillary cancer susceptibility. Results :The frequency of the variant XPC-PAT allele was lower in the cases(0.349) than in the controls (0.423), but the difference was not significant(p=0.140). Using logistic regression adjusting for age and sex, risk for thyroid papillary cancer was not increased in the XPC-PAT -/+ and XPC-PAT +/+ compared to XPC-PAT -/- (adjusted overall odds ratio[95% confidence intervals ; 95%CI]=0.52[0.26-1.03] and 0.62 [0.22-1.75], respectively; trend test, p=0.167). Conclusion :There are no relationship between the XPC-PAT polymorphism and the risk of thyroid papillary carcinoma in Korean population. Based on our results, XPC-PAT polymorphism do not modulate genetic susceptibility to thyroid papillary cancer.