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안기홍,한재구,김옥태,조재한,An, Gi-Hong,Han, Jae-Gu,Kim, Ok-Tae,Cho, Jae-Han 한국버섯학회 2021 한국버섯학회지 Vol.19 No.1
국내 자생하는 야생버섯 추출물의 생리활성 성분을 평가하기 위하여 각지에서 수집된 야생버섯 70% 에탄올추출물에 대한 DPPH 라디컬 소거능, 총 폴리페놀 및 총 플라보노이드 함량, 철 환원 항산화능, 환원력의 항산화 활성, 아질산염 소거능 및 야생버섯의 건조시료를 이용하여 베타글루칸 함량을 분석하였다. 본 연구에서 수집된 10종의 야생버섯류 중에서 영지(OK1362) 에탄올추출물의 DPPH 라디컬 소거능(73.2%), 총 폴리페놀 함량(28.9 mg GAE/g) 및 총 플라보노이드 함량(10.0 mg QE/g)철 환원 항산화능(0.134), 환원력(0.155), 아질산염 소거능(56.3%)이 다른 버섯류에 비하여 유의적으로 가장 높았다. 그 이외에도 아까시흰구멍버섯(OK1360), 광대버섯속의 A. lanigera (OK1398), 졸각무당버섯(OK1406)이 높은 항산화능 및 아질산염 소거능을 가지고 있음을 확인하였다. 또한 베타글루칸 함량은 영지(OK1362)가 25.2%를 나타내며 가장 높았으며, 그 외에 구름버섯속의 T. lactinea (OK1457)가 24.5%로 높은 것으로 나타났다. 본 연구의 결과는 국내 자생하는 야생버섯류 중 새로운 천연물 유래 생리활성 물질을 탐색하기 위한 기초자료로서 활용 가능성을 기대한다. The aim of the study was to obtain the extracts of various native wild mushrooms and select the useful resources though biological activity evaluation. The anti-oxidant potential, nitrite scavenging activity, and -glucan content of wild mushrooms collected from Eumseong and Bonghwa in Korea were investigated. Based on the results of this study, Ganoderma lingzhi (OK1362) showed the highest DPPH radical scavenging activity (73.2%), ferric reducing anti-oxidant power (0.134), reducing power (0.155), nitrite scavenging activity (53.6%), total polyphenol content (28.9 mg GAE/g), flavonoid content (10.0 mg QE/g), and -glucan content (25.2%) when compared to other wild mushrooms sampled in this study. In addition, it was confirmed that Perenniporia fraxinea (OK1360), Amanita sp. (OK1398), and Russula sp. (OK1406) had relatively high anti-oxidant and nitrite scavenging potentials. In conclusion, our results can provide fundamental data for extracting beneficial compounds from wild mushrooms.
영어 Much of an N 구문에 대한 말뭉치 기반적 접근
김옥기(Ok gi Kim),김종복(Jong Bok Kim) 현대문법학회 2015 현대문법연구 Vol.86 No.-
Okgi Kim and Jong-Bok Kim. 2015. English much of an N Construction: A Corpus-based Approach. Studies in Modern Grammar 86, 47-70. English much of an N (henceforth, MOA) construction (e.g., It’s not much of a problem.) consists of quantifiers like much, more/less, enough, little and of-an-NP to intensify the indefinite singular degree NP. In this paper, we first review basic properties of the construction, focusing on the relation between the gradability of the NP and its predicativeness. In particular, after investigating authentic corpus data of the MOA, we provide a qualitative and quantitative analysis which allows a constraint-based approach in accounting for various syntactic as well as semantic properties of the construction.
Kim, Hyunmi,Lee, Kyeyoon,Hwang, Hyunsik,Bhatnagar, Nikita,Kim, Dool-Yi,Yoon, In Sun,Byun, Myung-Ok,Kim, Sun Tae,Jung, Ki-Hong,Kim, Beom-Gi Oxford University Press 2014 Journal of experimental botany Vol.65 No.2
<P>Abscisic acid (ABA) is a phytohormone that plays important roles in the regulation of seed dormancy and adaptation to abiotic stresses. Previous work identified OsPYL/RCARs as functional ABA receptors regulating ABA-dependent gene expression in <I>Oryza sativa</I>. <I>OsPYL</I>/<I>RCAR</I>s thus are considered to be good candidate genes for improvement of abiotic stress tolerance in crops. This work demonstrates that the cytosolic ABA receptor OsPYL/RCAR5 in <I>O. sativa</I> functions as a positive regulator of abiotic stress-responsive gene expression. The constitutive expression of <I>OsPYL/RCAR5</I> in rice driven by the <I>Zea mays ubiquitin</I> promoter induced the expression of many stress-responsive genes even under normal growth conditions and resulted in improved drought and salt stress tolerance in rice. However, it slightly reduced plant height under paddy field conditions and severely reduced total seed yield. This suggests that, although exogenous expression of OsPYL/RCAR5 is able to improve abiotic stress tolerance in rice, fine regulation of its expression will be required to avoid deleterious effects on agricultural traits.</P>
A Study of Driver Brain Wave Characteristics through Changes in Headlamp Brightness
Kim, Hyun-Ji,Kim, Hyun-Jin,Kim, Gi-Hoon,Lee, Chang-Mo,Kim, Hoon,An, Ok-Hee The Korean Institute of IIIuminating and Electrica 2007 조명·전기설비학회논문지 Vol.21 No.9
In this study, tests of brain waves were carried out to investigate the physiological characteristics of drivers during a change of headlight brightness. The participants were 20 males in their 20s. Twenty-three different conditions combining the waveform of light, voltage, and alteration time were used. The measurement of brain waves was performed by an internationally standardized 10-20 method using LXE3232-RF. The results were as follows. 1. From the results of the brain wave map analysis, it was suggested that waveform A increases mental stress and waveform B affects mental and visual stress. The longer the stimulation time, the more stress level was detected. 2. The voltage alteration time of the B waveform should be kept to less than 1500msec, while the voltage should not fall below 11.5[V].
Ok, Jung-hun,Han, Kyung-hwa,Cho, Hee-rae,Zhang, Yong-seon,Seo, Young-ho,Jung, Kang-ho,Lee, Hyub-sung,Kim, Gi-sun 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.5
The measurement based on reliable standard operating procedures (SOPs) is important for consistent information. The objective of this study is to investigate reliable SOPs of soil physical methods, including core method for bulk density, Yamanaka hardness, and air permeameter method for air permeability. The coefficients of variation in bulk density (core method), Yamanaka hardness, and air permeability were ranged of 1~6%, 8~13%, and 10~84%, respectively. The variation in situ measurement such as bulk density, hardness, and air permeability due to spatial variability at measuring site was larger due to the number of replicates, organic matter content, and soil texture. Nevertheless, air permeability had different values as different number of replicates, and thus, it is thought that more replicates can result in higher reliability. It suggested that investigation of soil physical properties for the target sites should required to consider about soil texture, organic matter content, and number of replications before measurement. In conclusion, core sampling for bulk density measurement in upland soil recommended to perform in 3 repetitions with 2 inch core, and 3 inch core sampling for higher organic matter content.
Two new Lycoperdon species collected from Korea: L. albiperidium and L. subperlatum spp. nov.
KIM, CHANG SUN,JO, JONG WON,KWAG, YOUNG-NAM,SUNG, GI-HO,HAN, JAE-GU,KIM, SANG-YONG,SHIN, CHANG-HO,HAN, SANG-KUK,SHRESTHA, BHUSHAN,OH, SOON-OK Magnolia Press 2016 Phytotaxa Vol.260 No.2
<P>Thirty-four Lycoperdon specimens from Korea were examined with the internal transcribed spacer (ITS) region of ribosomal DNA sequence data. The result of the ITS sequences phylogenetic analysis indicated that the Korean specimens represented nine different species. To confirm the taxonomic position of these species, we conducted an intensive morphological investigation, and additional phylogenetic investigation of the protein coding regions RNA polymerase subunit II (RPB2) and translation elongation factor 1-alpha (TEF1). We discovered two new species (L. albiperidium and L. subperlatum) and one (L. ericaeum) newly discovered in Korea. Lycoperdon albiperidium is closely related to L. ericaeum based on ITS, RPB2 and TEF1 sequence data, but these species were distinguishable by morphological characteristics, especially the shape of the basidiocarps, the diameter of the eucapillitial threads and the size of the basidospores. Lycoperdon subperlatum is quite similar to the European and American L. perlatum based on morphological characteristics. However, L. subperlatum is clearly distinct from European and American L. perlatum based on ITS, RPB2 and TEF1 sequence data, and somewhat differs from them in macro- and microscopic characteristics. Based on morphological characteristics, L. ericaeum is related to L. subumbrinum and L. lividum but it is distinguishable by the presence of fragile, eucapillitial threads, the diameters of the threads and ITS sequences. Here, we describe four Lycoperdon species collected in Korea.</P>
( Ok-hee Kim ),( Hyojung Kim ),( Jinku Kang ),( Dongki Yang ),( Yu-hoi Kang ),( Dae Ho Lee ),( Gi Jeong Cheon ),( Sang Chul Park ),( Byung-chul Oh ) 생화학분자생물학회(구 한국생화학분자생물학회) 2017 BMB Reports Vol.50 No.1
Accumulation of tissue macrophages is a significant cha-racteristic of disease-associated chronic inflammation, and facilitates the progression of disease pathology. However, the functional roles of these bone marrow-derived macrophages (BMDMs) in aging are unclear. Here, we identified age-dependent macrophage accumulation in the bone marrow, showing that aging significantly increases the number of M1 macrophages and impairs polarization of BMDMs. We found that age-related dysregulation of BMDMs is associated with abnormal overexpression of the anti-inflammatory interleukin-10. BMDM dysregulation in aging impairs the expression levels of pro-inflammatory cytokines and genes involved in B-cell maturation and activation. Phagocytosis of apoptotic Jurkat cells by BMDMs was reduced because of low expression of phagocytic receptor CD14, indicating that increased apoptotic cells may result from defective phagocytosis of apoptotic cells in the BM of aged mice. Therefore, CD14 may represent a promising target for preventing BMDM dysregulation, and macrophage accumulation may provide diagnostic and thera-peutic clues. [BMB Reports 2017; 50(1): 43-48]
Kim, Ju Young,Kim, Jumi,Kang, Seok Hun,Shin, Dong Ok,Lee, Myeong Ju,Oh, Jimin,Lee, Young-Gi,Kim, Kwang Man Electronics and Telecommunications Research Instit 2020 ETRI Journal Vol.42 No.1
All-solid-state batteries are promising energy storage devices in which high-energy-density and superior safety can be obtained by efficient cell design and the use of nonflammable solid electrolytes, respectively. This paper presents a systematic study of experimental factors that affect the electrochemical performance of all-solid-state batteries. The morphological changes in composite electrodes fabricated using different mixing speeds are carefully observed, and the corresponding electrochemical performances are evaluated in symmetric cell and half-cell configurations. We also investigate the effect of the composite electrode thickness at different charge/discharge rates for the realization of all-solid-state batteries with high-energy-density. The results of this investigation confirm a consistent relationship between the cell capacity and the ionic resistance within the composite electrodes. Finally, a concentration-gradient composite electrode design is presented for enhanced power density in thick composite electrodes; it provides a promising route to improving the cell performance simply by composite electrode design.