Intracellular reactive oxygen species(ROS) produced in a various pathologic state was known to intermediate many cellular response such as inflammation. Recently, low level light irradiation by HeNe laser used in many clinical field could improve inflammatory state by scavenging intracellular ROS through photo-detachment/dissociation process. The purpose of this study is to investigate the differential effects of blue and red light irradiation on ROS scavenging effects. Immortalized human oral keratinocyte HaCat cells were used. Phorbol 12-myristate 13-acetate(PMA) was treated for inflammation. Red(635nm) and blue(470nm) light irradiation was carried out. To asses the intracellular ROS by light irradiation, confocal microscopic and flow cytometric assay with DCF fluorescence for total ROS and ESR spectrometry of DMPO-O2 - for superoxide anion were caried out. And microarray was performed for mRNA expression level. Released intracellular total ROS in PMA treated HaCat cell lines was dissociated efficiently by red light irradiation, while blue light irradiation did not. Rather, blue light irradiation increased ROS formation. For superoxide anion generated the first synthetic form of ROS, red light irradiation reduced its amount but blue light irradiation did not. In the mRNA expression in line with cyclooxygenase(COX) pathway, prostagrandin endoperoxide synthase 1(PTGS 1), prostagrandin endoperoxide synthase 2(PTGS 2) and phospholipase A2(PLA2) were increased by both light irradiation and they were decreased as time flows. And genes associated with ROS releasing, mRNA expressions of tumor necrosis factor receptor (TNFR) and interleukin 1beta(IL1B) were increased by 1 hour red light irradiation but did not by blue light irradiation. As a result, red and blue light irradiation showed different response in affecting the level of ROS. These findings indicate that red light rather than blue light is more useful for anti-inflammation in clinical field

The phytochemicals of many plants suggest their potential use as dietary supplements in cancer chemoprevention and chemotherapy. In the present study, antitumor activity of Cudrania tricuspidata, a plant native to East Asia, was investigated. Cell growth inhibition of the extract on HT-29 colorectal adenocarcinoma using MTT colorimetric assay was determined. Apoptosis on HT-29 cells was performed by DNA fragmentation analysis. PGE2 release was measured by enzyme immunoassay, because PGE2 is a key protumorigenic prostanoid in many human cancers. For the ROS scavenging activity, ROS level was detected by laser scanning confocal microscope. It was found that methanol extract of leaves inhibits cell viability by inducing apoptosis as evidenced by DNA fragmentation. Stem bark decreases synthesis of PGE2, inflammatory mediator. Fruits exhibited pronounced ROS scavenging activity. Taken together, these results suggest that Cudrania tricuspidata exerts growth inhibition and anti-oxidation on HT-29 cells through apoptosis, ROS scavenging respectively that it may have anti-cancer properties.

본 연구의 목적은 강원도 강릉시 강릉국유림 관리소 관할의 국유림 내에 위치한 27년생 잣나무 조림지를 대상으로 하여 바이오매스 및 바이오매스 구성비, 바이오매스 추정식, 순생산량, 줄기밀도 및 바이오매스 확장계수 등을 조사 분석하는데 있다. 선정된 표준지에 대하여 20m×20m 조사구를 설치한 후 매목조사를 실시하고, 직경급 분포를 고려하여 총 5주의 표본목을 벌채하였으며, 이 중 3주는 뿌리까지 전량 굴취하였다. 27년생 잣나무에 대한 임목 전체 건중량은 117.6 kg/tree로 나타났으며, 잣나무 임분의 지상부 건중량은 59.9 ton/ha, 지하부를 포함한 임목 전체 건중량은 82.4 ton/ha로 나타났다. 뿌리 대 지상부 비율은 0.38이였으며, 순생산량은 지상부 건중량 9.4 ton/ha, 지하부를 포함한 임목 전체 건중량 11.3 ton/ha로 나타났다. 줄기밀도는 0.49 g/㎤, 지상부 바이오매스 확장계수는 1.78, 지상부와 지하부를 포함한 임목 전체 바이오매스 확장계수는 2.19로 나타났다. 이와 같은 자료는 잣나무조림지에 대하여 바이오매스 및 탄소축적량을 추정하는데 활용될 수가 있다.

In this study, QA/QC (quality control/quality assurance) data of reduced sulfur compounds from several institutes were obtained and compared based on the Korean standard method for off-odor. From the results, attempts were made to optimize the analytical conditions and improve the measurement reliability of reduced sulfur compounds analyses from detailed CF/TD and GC/PFPD information. Analysis results (minimum detection limit, precision, recovery rate) of reduced sulfur compounds based on the each analytical condition corresponded with the Korean standard methods for off-odor. Therefore, we expect that we could execute the exact analysis if we use the analytical condition of CF/TD and GC/PFPD in this study

본 연구에서는 충청남도 공주시에 위치한 공주대학교 자연과학대학 옥상에 설치된 분광복사측정기의 일종인 스카이라디오미터(Sky-radiometer)로 측정된 직달 및 산란 일사량을 이용하여 간접적으로 공주지역의 에어로솔의 광학적 특성을 분석하였다. 분석기간은 2004년 1월부터 12월까지이며 에어로솔의 광학적 특성의 분석에 활용된 알고리즘은 Skyrad.pack.3(Nakajima et al., 1996)이다. 주요 분석요소는 에어로슬의 광학두께(AOT), 단일 산란알베도(SSA), 옹스트롬 지수α 및 에어로솔의 크기별 분포이며 분석결과의 질을 높이기 위하여 초기 관측 자료의 품질검사를 수행하였다. 공주지역의 연평균 AOT, α 및 SSA는 각각 0.46, 1.14, 그리고 0.91이며 계절 및 기상현상에 따라 큰 시간변동을 보이고 있다. 크기별 입자분포에서는 미세입자와 조대입자에서 최대치가 나타나는 쌍봉(bi-modal) 형태를 보이고 있으며 황사(Asian dust) 기간인 봄에는 조대입자의 총 부피가 크게 증가하고 여름에는 반대로 미세입자의 부피가 증가하는 계절변동을 보이고 있다. 이러한 현상은 봄철동안에 AOT와 SSA가 각각 크게 증가하고 감소하는 점에서도 확인되고 있다. 또한 공주지역의 에어로솔의 광학적 특성은 계절에 따라서 변화가 크게 나타나고 있으나 풍향의 영향은 거의 받지 않는 것으로 나타나고 있다.

한국 돼지고기의 등심, 햄 및 삼겹살과 수입 삼겹살에서 유리된 드림의 pH, 수분, 조단백질 및 아미노산 함량을 분석 비교하였다. 또 등심육의 드립에 아질산나트륨 0.02%, 식염 2.0%, 아스코르부산나트륨 0.06%, 설탕 1.0% 및 피로인산나트륨을 0.3%가 되도록 첨가하여 4℃에서 염지하면서 염지효과를 검토하였다. 드립의 pH 및 수분함량은 각각 5.72∼6.05 및 88.05∼90.85%로 부위별로 큰 차이가 없었다. 국내산 돼지고기 등심, 햄, 삼겹살과 수입삼겹살의 조단백질 함량은 각각 11.07, 8.85, 8.76 및 8.13%이었고, 이것을 수분함량과 합하면 99% 정도를 차지하였다. 등심육 드립의 유리아미노산 총량은 다른 부위육보다 많았으며, 부위에 관계없이 glutamic acid, proline, glycine, alanine 및 lysine이 많이 함유되어 있었다. 드립을 염지하였을 때에 아질산염 첨가구가 무첨가구보다 pH 상승 정도가 컸고, 미생물 증식이 느렸으며, 아질산근 잔존량은 염지 3일째부터 현저히 감소되었다. 또 염지기간중 유리아미노산 총량은 증가되었다.

To study on the standard food cooking method of perilla seed soup, author analyzed the fatty acids of the soup by gas chromatography, and estimated its appearance, flavor, taste, viscosity, and overall taste by the sensory evaluation. We measured the change of TBA (Thiobarbituric acid) values of the oil from perilla seed soup during the period of storage at 4℃. The results were as follows: 1. The sensory evaluation indicated the best level at the S4 group, the ratio of rice powder to perilla seed was 50 to 40. 2. The most fatty acid of S4 group (perilla seed: 40 g) was linolenic acid. 3. The TBA values of the oil from perilla seed soup increased continuously according to the storage duration at 4℃. According to these results, it was concluded that perilla seed soup would supplement essential fatty acid, linolenic acid.

본 연구는 일상 대화 말뭉치를 통해 <너무/되게/엄청 + 형용 사>의 의미적 선호를 분석하는 데 목적이 있다. 분석 결과, <너무+형 용사>에서는 [경험-심리]가 높은 선호도를 보였으며, <되게+형용사> 에서는 [경험-논리], <엄청+형용사>에서는 [사물-측량]이 높은 선호도 를 보였다. 한편, 세 정도부사에서 사물에 대한 추상적 묘사를 의미하 는 [사물-추상]의 의미 선호는 1건도 나타나지 않았다. 또한, 대부분의 의미 유형에서 <너무+형용사>의 의미 선호가 가장 많았으나 [사물- 형태]에서는 <되게+형용사>의 의미 선호가 많았다. 향후 정도부사의 피수식어로 동사나 ‘명사+이다’ 등의 의미적 선호 양상 분석이 이루어 지기를 바란다.

Heatwaves can affect human health and vegetation growth and bring about energy problems and socioeconomic damages, so the analysis and prediction of the heatwave is a crucial issue under a warming climate. This paper examines the production of STCI (Standard Temperature Condition Index) using ASOS (Automated Synoptic Observing System) in-situ observation data for the period of 1979-2020, and an STCI predictability assessment with an RF (Random Forest) model using ERA5 (ECMWF Reanalysis 5) meteorological variables. The accuracy was quite high with the MAE (Mean Absolute Error) of 0.365 and the CC (Correlation Coefficient) of 0.873, which corresponded to 7% to 10% difference for the range of STCI<1.5, and to 1% to 3% difference for the range of STCI>1.5, in terms of the probability density function. Also, we produced gridded maps for the summer STCI from 1979 to 2020 by utilizing the ERA5 raster data for the RF prediction model, which enables the spatial expansion of the ASOS point-based STCI to a continuous grid nationwide. The proposed method can be applied to forecasting of STCI by adopting future meteorological or climatic datasets.

Because of the population growth and industrialization in recent decades, the air quality over the world has been worsened with the increase of PM10 concentration. Korea is located near the eastern part of China which has many industrial complexes, so the consideration of China’s air quality is necessary for the PM10 prediction in Korea. This paper examines a machine learning-based modeling of the prediction of tomorrow’s PM10 concentration in the form of a gridded map using the AirKorea observations, Chinese cities’ air quality index, and NWP (numerical weather prediction) model data. A blind test using 23,048 cases in 2019 produced a correlation coefficient of 0.973 and an MAE (mean absolute error) of 4.097㎍/㎥, which is high accuracy due to the appropriate selection of input variables and the optimization of the machine learning model. Also, the prediction model showed stable predictability irrespective of the season and the level of PM10. It is expected that the proposed model can be applied to an operative system if a fine-tuning process using a larger database is accomplished.

In this study, standard precipitation index- based analysis associated with run theory was performed using 53 years’ (1967– 2019) precipitation data to investigate the meteorological drought in Chuncheon. The duration of the meteorological drought in Chuncheon was 8.06 months, magnitude of the drought was -8.21, and average drought depth was -1.08. The drought in May 2014 lasted 21 months until January 2016; the drought scale and average depth was -34.06 and -1.62, respectively. This was the most severe drought in Chuncheon. As a result of drought frequency analysis, the drought scale of May to December in 2014 was estimated to be -16.16, and the return period was estimated to be 300 years. These results are expected to further increase the magnitude and frequency of weather droughts caused by climate change. Therefore, it is critical to prepare appropriate structural measures.

This study conducted to analyze the growth characteristics of old Prunus yedoensis on Jeju island. The diameter growth per year was measured using a DTRS-2000 instrument. The DBH, ground DBH and height of the investigated P. yedoensis were 137 cm, 143 cm, and 15.5 m, respectively. Our analysis showed that the age of the old P. yedoensis was 93 years. An annual diameter growth of 2.85 mm±0.96 was observed. The result of age estimation, about 265±64 years in P. yedoensis on Jeju island. This information could be useful to understand the annual diameter growth characteristics the P. yedoensis distributed on Jeju island.

목적: 이 연구의 목적은 한국과 중국 엘리트 수영선수들을 대상으로 시합결과에 대한 결과귀인 및 패배 귀인과 사후가정의 관계를 규명하는 것이다. 방법: 연구 대상은 2016 - 2017년도 한국과 중국 수영협회에 등록된 207명의 엘리트 수영선수들이다. 결과: 첫째, 결과귀인에서 한국과 중국 선수들 모두 상대실력을 낮게 귀인한 선수들이 상향적 사후가정을 더 많이 하는 것으로 나타났다. 반면, 한국선수들의 경우 자기 실력 귀인을 많이 할수록 상향적 사후가정이 많은 반면, 중국 선수들은 집단 간 차이가 없는 것으로 나타났다. 둘째, 한국과 중국 선수들 모두 자만심 패배귀인이 높을수록 더 상향적 사후가정을 하는 것으로 나타났다. 그러나, 한국 선수들의 경우 팀웍 귀인이 높을수록 타인관련 상향적 사후가정을 한 반면, 중국 선수들은 팀웍과 관련해서 집단 간 차이가 발생하지 않았다. 또한, 한국 선수들의 경우 컨디션 귀인을 할수록 하향적 사후가정을 한 반면, 중국 선수들은 타인관련 상향적 사후가정에 유의미한 차이가 있는 것으로 나타났다. 셋째, 상향적 사후가정에 유의한 영향력을 미치는 패배 귀인은 한국 선수들의 경우, 우리 실력 혹은 팀웍이고 중국 선수들의 경우 자만심과 컨디션으로 나타났다. 논의: 한국과 중국 선수들의 결과에 대한 공통점과 차이점을 비교문화적인 측면에서 논의했으며, 타당성 있는 척도 개발 및 비교문화 후속 연구를 제언했다.