http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Lee, Youngbin,Cho, Sung Beom,Chung, Yong-Chae American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.16
<P>MXene has not yet been investigated in optical applications because it is a newly suggested two-dimensional material. In the present work, the first investigation of the prospects of MXene as a novel optical nanodevice was done by applying strain to monolayer Sc<SUB>2</SUB>CO<SUB>2</SUB> using first-principles density-functional theory. This single-layer material experiences an indirect to direct band gap transition with variation of the band gap size at a relatively small critical strain of about 2%. The present work emphasizes that monolayer MXene can become a promising material for an optical nanodevice by modulating the band gap properties using strain engineering.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-16/am504233d/production/images/medium/am-2014-04233d_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am504233d'>ACS Electronic Supporting Info</A></P>
Sang-Beom Lee,Nam-Gyu Ha,Kwon-Ho Park,Young-cheol Choi,Sang-Cheol Lee 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05
The time-zone of pollinating activity according to numbers of Apis mellifera hive released in the strawberry(Maehyang var.) houses was together from 9A.M. to 4P.M., and the peak times of pollinating activity were between 11A.M and 1P.M.. The effects on pollinating activity according to numbers of A .mellifera hive released in the strawberry houses were ordered 5bee combs(11,000heads), 4bee combs(8,800heads) and 3bee combs(6,600heads). The rate of workers lost in A. mellifera hives with 5bee combs and 4bee combs during the strawberry cultivating period were lower than that of 3bee combs. The rates of fruit set by pollinating activity according to numbers of A.mellifera hive released in the strawberry houses were same level with 99%. The fruit qualities; No. of seeds, sugar content and rate of normal fruit set were same level, but fruit weight was ordered 5bee combs in 16.9g, 4bee combs in 16.4g and 3bee combs in 15.6g. The rate of marketable fruit of 4bee combs and 5bee combs were 5% to 9% higher than that of 3bee combs, respectively.
Lee, Jong-Geol,Yon, Jung-Min,Jung, Ki-Youn,Lin, Chunmei,Jung, A-Young,Lee, Beom-Jun,Yun, Young-Won,Nam, Sang-Yoon 韓國受精卵移植學會 2011 한국동물생명공학회지 Vol.26 No.4
Procymidone is a fungicide with anti-androgenic properties widely used to protect fruits from fungal infection, which induces an excessive reactive oxygen species production in male reproductive organs. In this study, to clarify whether procymidone affect the cellular antioxidant system of prostate at onset of puberty, gene expression patterns of the representative antioxidant enzymes such as cytoplasmic glutathione peroxidase (GPx1), phospholipid hydroperoxide GPx (PHGPx), selenoprotein P (SePP), cytoplasmic copper/zinc superoxide dismutase (SOD1), and manganese SOD (SOD2) were investigated in the rat ventral prostates exposed to procymidone using real-time RT-PCR analyses. Seven-week-old Sprague-Dawley rats castrated at 6 weeks old were treated with procymidone (25, 50, or 100 mg/kg per day) orally for 7 consecutive days after testosterone propionate (0.4 mg/kg per day) administration by subcutaneous injection. As compared to normal control animals, GPx1 mRNA expression in prostates significantly increased by the administration with TP and/or procymidone. However, PHGPx and SOD1 mRNA levels significanatly decreased by over 25 mg/kg of procymidone treatment and SePP and SOD2 mRNA levels was significanatly reduced by over 50 mg/kg of procymidone treatment. These findings indicate that procymidone may affect the antioxidant system of prostatic cells in up-regulation mode of GPx1, but in down-regulation modes of PHGPx, SePP, SOD1, and SOD2, suggesting that procymidone may affect differently the cellular antioxidant system of prostate according to the exposure doses.
Characteristics and distribution of terpenes in South Korean forests
Lee, Jaeseok,Cho, Kyoung Sang,Jeon, Youngjae,Kim, Ji Beom,Lim, Young-ran,Lee, Kyungho,Lee, Im-Soon The Ecological Society of Korea 2017 Journal of Ecology and Environment Vol.41 No.5
The importance of forests continues to increase throughout the world, and one of the reasons is that a forest is a major place to emit terpenes, which have been reported to be beneficial to human health. In South Korea, forests occupy about 64% of the total land area and consist mainly of pine and oak trees. Since only a limited number of forests have been analyzed to date, a comprehensive understanding of terpenes emitted from regional forests remains in its infancy in Korea. Here, to gain insights into terpenes from regional forests located in South Korea, we review the characteristics of Korean forests and recent studies on major terpenes emitted from regional forests as well as from native trees dominant in South Korea. We also discuss meteorological factors that affect the terpene emissions in Korean forests. In conclusion, 18 types of terpenes were detected in Korean forests and their compositions in different forests are largely dependent on the dominant plant species in the forest. Moreover, terpene emissions in Korean forests are affected by various environmental factors, including temperature, amount and duration of daylight, season, and age of trees. To improve the understanding of the characteristics of terpene distribution, more studies are required on the terpene production of Korean forests in various regions.
Teratogenic Effects of Nano- and Micro-sized Particles of Zinc Oxide during Mouse Organogenesis
Sang-Yoon Nam , Jung-Min Yon, A Young Jung, Chunmei Lin, Jong-Geol Lee, Ki Youn Jung, Hansung Na, Myeon-Woo Chung, Beom Jun Lee, Young Won Yun 충북대학교 동물의학연구소 2011 Journal of Biomedical and Translational Research Vol.12 No.2
Zinc oxide nanoparticles (nZnO) are used in a various range, including ceramic manufacture, photocatalysis, UV filters, and the food industry. However, little is known about the effects of micro- and nano-particles during mouse embryo organogenesis. To determine whether ZnO affects size-dependent anomalies during embryonic organogenesis, mouse embryos were cultured for two days with 300 ug/ml micro ZnO (mZnO;80±25 μm) and nZnO (< 100 nm) and the developmental changes were then investigated. Quantity of Zn by inductively coupled plasma mass spectrometry analysis, and expression patterns of various antioxidant enzymes in the embryos were investigated. Embryos exposed to mZnO or nZnO exhibited severe retardation of growth and development. In embryos exposed to mZnO and nZnO, yolk sac diameter, crown-rump length, and head length were significantly diminished. The morphological parameters, including yolk sac circulation, allantois, flexion, heart, hindbrain, midbrain, forebrain, otic system, optic system, branchial bars, maxillary process, mandibular process, olfactory system, caudal neural tube, forelimb, hindlimb, and somites in mZnO and nZnO-treated groups were significantly decreased. Zn absorption of the nZnO-treated group was significantly higher than that of the mZnO-treated group. Significantly decreased levels of CuZn-SOD, Mn-SOD, cGPx, and PHGPx mRNA were observed in the ZnO-treated group. In addition, antioxidant enzyme mRNA expressions of the nZnO group were significantly diminished, less than those of the mZnO treated group. These findings indicate that 300 ug/ml ZnO showed abnormality and nZnO may have a more severe effect than mZnO in developing embryos.
Sung, Ki Jung,Lee, Ye Ji,Kim, Hyo Bin,Kim, Beom Seok,Jeon, Ju Hyun,Kim, Eun Seok,Kim, Young Il Korean AcupunctureMoxibustion Medicine Society 2021 대한침구의학회지 Vol.38 No.2
Background: This study was designed to statistically analyze the year, gender, age, insurance type, and condition/disease of patients who were admitted to the Department of Acupuncture and Moxibustion Medicine at DaeJeon Korean Medicine Hospital over a 5-year period (2015-2020). Methods: Patients who visited the Department of Acupuncture and Moxibustion Medicine at DaeJeon Korean Medicine Hospital were classified according to year, gender, age, insurance type, and condition/disease. The statistical analysis was performed using IBM SPSS 23.0. Results: There is an increasing number of patients attending the Department of Acupuncture and Moxibustion Medicine year-on-year over the 5-year period, with a higher frequency of females than males each year. The largest age groups represented in these patients were those aged in their 50s, followed by those aged in their 40s, and 60s. Furthermore, the number of patients using health insurance was greater than those using automobile insurance each year. Of the 5,061 patients, the most common group was the patients (n = 991) who reported sprain and strain of cervical spine, followed by lumbar spine, lumbar herniation of the intervertebral disc, and facial paralysis. Conclusion: The number of patients seeking traditional Korean medicine treatment continues to increase, particularly in the 40s to 60s age group, with a larger proportion using health insurance and sprain or strain of the cervical spine. The results of this study may be used as a local (Daejeon) reference to develop Korean medicine policies, such as setting up medical benefits for patients using Korean medicine hospitals.