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Young-Chul Kim,Hyun-Hee Chae,Sang-Heock Oh,Seung-Ho Choi2,Moon-Pyo Hong3,Gi-Heum Nam,Jae-Yoon Choi,Hyun-Sook Choi,Kyu-Song Lee 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.2
Yongneup wetland protected area, the only high moor in Korea, is a core area to conserve biodiversity. Even though the Yongneup wetland protected area is relatively small, various plant species are distributed in the Yongneup wetland protected area because it includes various habitats showing different environmental gradients. Vascular plants distributed in the Yongneup wetland protected area were identified as a total of 376 taxa that is composed of 73 families, 217 genera, 322 species, 3 subspecies, 44 varieties and 7 forms. For endangered plants designated by the Ministry of Environment, 5 species including Trientalis europaea var. arctica, Lilium dauricum, Halenia corniculata, Lychnis wilfordii and Menyanthes trifoliata were found and 34 taxa were confirmed to be distributed only in the mountainous wetland habitats. Regarding naturalized plants, a total of 11 taxa were distributed, but most of them were distributed in the areas where artificial interference has occurred. And in areas inside the wetlands that are relatively well preserved, 2 species of Bidens frondosa and Erigeron annuus were observed. In this study, the occurrence and distribution of Pseudostellaria baekdusanensis M. Kim, which was recently found in Mt. Baekdu and reported as a new species, were identified in the Yongneup wetland protected area. A wetland is a very vulnerable area to drastic environmental changes and damages to its ecosystem could cause the extinction of rare plant species which are distributed only in the wetlands. Therefore, it is mandatory that current status of the Yongneup wetland protected area is evaluated and actions to prevent rapid environmental changes are taken. Fourteen separate investigations were conducted in 2013 and another four in 2014, to evaluate current status of the Yongneup wetland protected area. These investigations have provided us the basic information for future actions of conservation and restoration.
Yong-Hwan Moon,Sang-Bong Choi,Jong-Il Kim,Joon-Chul Kim,Tae-Jin Han 외 2인 강원대학교 기초과학연구소 1997 기초과학연구 Vol.8 No.-
By screening a Pimpinella brachycarpa shoot tip cDNA library with the soybean homeo-domain-leucine zipper (HD-Aip) gene, Gmhl, as a probe, we isolated three cDNA clones, Phz1, Phz2, and Phz4, encoding polypeptides that contain a homeodomain and a closely linked leucine zipper motif. In both nucleotide and deduced amino acid sequences, Phz1, Phz2, and Phz4 were highly homologous to two Arabidopsis thaliana HD-Zip genes, a soybean HD-Zip gene and a tomato HD-Zip gene in an HD-Aip motif. Genomic Southern blot analysis indicated that Phz2 and Phz4 are members of a multigene family. RNase protection assay revealed that Phz2 and Phz4 are expressed at all organs including leaves, petioles, roots and shoot tips. So far, these HD- Zip proteins have been found only in dicotyledonous plants. Thus, it may be speculated that Phz1, Phz2, and Phz4 proteins could impart functional characters unique to the dicotyledonous plants that would express them in processes common to those plants.
Daesung Lee,Yeongwan Seo2,Jungho Lee,Jungkee Choi 강원대학교 산림과학연구소 2017 Journal of Forest Science Vol.33 No.4
This study was carried out to estimate the parameters of stem taper functions, to figure out the best taper model by species, and to compare with previous studies by species, targeting on the stemmed tree samples collected from the Korean red pine (Pinus densiflora), Korean white pine (Pinus koraiensis), and Japanese larch (Larix kaempferi ) stands in Gangwon and North Gyeongsang provinces of South Korea. The seven widely used models were applied in this study, and Muhairwe 1999 model for Korean red pine and Korean white pine and Kozak 2002 model for Japanese larch were evaluated as the best model for each species according to the fit statistics and the predicted stem form comparison. In addition, the predicted diameter was suitably fitted when comparing the previous studies, and the values were more appropriate following stem taper according to neiloid, paraboloid, and cone parts by species. Consequently, the estimation of this study was considered to represent the stem taper well. When comparing stem taper of three species, the diameter was largest in Korean white pine. Overall, the taper models of this study are judged to be useful for estimating stem form and volume computation of Korean red pine, Korean white pine, and Japanese larch.
갑상샘의 미만성 경화아형 유두상암의 1예 보고: 초음파와 컴퓨터 단층촬영 영상
김흥철,남궁숙,홍명선,황임경,김한준<SUP>1<.SUP>,최영희<SUP>2<.SUP>,Heung Cheol Kim,M.D.,Sook Namkung,M.D.,Myong Son Hong,M.D.,Im Kyung Hwang,M.D.,Han Joon Kim,M.D.<SUP>1<.SUP> and Young Hee Choi,M.D.<SUP>2<.SUP> 대한갑상선-내분비외과학회 2008 The Koreran journal of Endocrine Surgery Vol.8 No.1
We report here on a case of diffuse sclerosing papillary carcinoma (DSPC), which is a subtype of papillary carcinoma of thyroid, in a 27-year-old female. The ultrasound images showed diffuse enlargement of the thyroid lobes and this was associated with underlying diffuse scattered microcalcifications and a heterogeneous hypoechoic background parenchyma that was without any masses. The CT image showeddiffuse scattered dot-like hyperdensities with bilateral multiple metastastic lymph nodes. Because making the cytological diagnosis of DSPC is still challenging, the radiological findings that show this disease's characteristic features may be important clues for making the correct diagnosis. <B>(Ko</B><B></B><B>rean J Endocrine Surg 2008;8:43-47)</B>
A Colorimetric Method for Estimation of Fermented Degree in Black Tea Processing
Kap Seong Choi,Won Mo Yang2,* 한국차학회 2015 한국차학회지 Vol.- No.S
This study was conducted to determine which color attribute change the more during fermentation in tea processing and if relationship between a tea pigment compound and the color index by fermentation level. Fermentation was performed after rolling. Hunter’s color value was measured either by using colorimeter or spectrum color meter. The liquor of finished tea was subjected to chemical analyses for total theaflavins, thearubigin, caffeine,catechin compounds. Hunter color b-value, yellowness, decreased during fermenting process while it was slightly increased at earlier stage. Hunter color a-value, redness, increased from minus value to plus during fermentation. The color b-value was higher than a-value in an earlier fermentation process. The difference Hunter value between b and a decreased gradually as fermentation time was increased, which values meet on a point at a certain fermentation time. After this time, color a-value was higher than the b-value. The result suggested that the color difference value between Hunter b and a can be applied on estimating fermented degree in black tea processing, with a relationship by the equation, ‘Fermentated Degree (%) = Hunter value b - a’. Total theaflavin increased until 30 min fermentation by 91.39 ± 4.80 mg% and then decreased by 36.79 ± 1.90 mg% at 180 min fermentation, while thearubigin increased until 120 min fermentation by 63.1 ± 1.92 mg% and then decreased by 30.8 ± 1.48 mg% at 180 min fermentation level. Caffeine and catechin compounds such as EGCg and ECg decreased as fermentation levels were high. These results was in agreement with the result that tea catechins changed to thearubigins through theaflavins. These results of chemical analysis also showed that the color difference data, Hunter value b-a, can be used to determine fermentation-stop point during black tea processing. If ICT technology is applied on automation of tea processing, the control of fermentation process can possibly be controlled and standardized by monitoring with automatic color difference meter.
Clinical and histological significance of atypical glandular cells on cervical cytology(초)
최홍준 ( Hong Jun Choi ),( Woo Chul Kim ),( Ho Soap Hahn ),( Seok Geun Yoon ),( Yong Soon Kwon ),( In Ho Lee ),( Kyung Taek Lim ),( Ki Heon Lee ),( Jae UK Shim ),( Jung Eun Mok ),( Yi Kyeong Chun2 ),( Ta 대한산부인과학회 2009 대한산부인과학회 학술대회 Vol.95 No.-
미얀마 건조지 토지피복 변화와 식생온도조건지수간의 관계분석
최솔이 ( Sol E Choi ),이우균 ( Woo Kyun Lee2 ),( Hangnan Yu ),강호덕 ( Ho Duck Kang ),김용석 ( Yong Suk Kim ) 한국지리정보학회 2014 한국지리정보학회지 Vol.17 No.2
본 연구에서는 미얀마 내 Mandalay, Magway 지역에 대해 Landsat 4-5 TM 위성영상을 이 용하여 토지피복 변화와 식생온도조건지수(Vegetation Temperature Condition Index; VTCI)의 관계를 분석함으로써, 미얀마 토지피복 변화와 건조 정도의 관계를 밝히고자 하였다. 토지피복 변 화를 분석한 결과, 연구 대상 지역에서 산림은 감소하는 것으로 나타난 반면, 주거지와 농경지의 면적은 증가하였다. VTCI 분석을 수행한 결과, (a)지역에서는 매우 건조한 지역의 면적이 점차 감소하고, 건조한 지역 및 보통, 습윤한 지역의 면적이 증가하여 건조의 정도가 다소 감소되는 것 으로 나타났다. (b)지역 또한 매우 건조한 지역의 면적이 증가하여 건조 정도가 심각해지는 것을 파악할 수 있었다. VTCI와 토지피복 변화의 관계 분석결과는 두 지역의 매우 건조한 지역에서 산 림 및 주거지의 농경지로의 변화 비율이 비교적 높게 나타나고, 변화된 지역의 VTCI 평균이 감소 하여 토지피복의 변화와 건조 정도의 변화의 관련성을 찾을 수 있었으며, 건조지역이 점차 증가하 고 있음을 확인하였다. Condition Index(VTCI) using Landsat 4-5 TM satellite images in Central Dry Zones of Myanmar. As a result of land cover classifications, while vegetation areas gradually decrease, residential area and cropland were increased. VTCI analysis shows that region (a) showed a gradual decrease in the area of severely arid, and increase in the area of moderate dry and wet, which sums up to a slight decrease in aridity. Region (b) also showed to increase in dry areas and severe aridity. The result of relational analysis between VTCI and land cover change showed high ratio of land cover change, from severe arid area to forest and residential farmland. The average VTCI decreased in the changed land covers, which indicates the relationship between aridity and land cover change and a gradual increase in the arid area was identified.
Ji-Young Rhee,Jae-Jin Choi2,Seong-Hoon Kee 한국콘크리트학회 2019 International Journal of Concrete Structures and M Vol.13 No.3
In this recent work, a ground penetrating radar (GPR) technique was proposed to evaluate the deteriorated depth of concrete bridge decks with asphalt overlays in the Korea expressway network. Air-coupled GPR was utilized in the measurement of the relative permittivity of concrete on bridge decks with asphalt overlays and the electromagnetic (EM) wave attenuation of the concrete cover of top reinforcing bars (rebars) in the pilot bridge in public service. In addition, 13 core samples were obtained from the bridge deck to carry out a detailed survey that includes visual inspection of the deterioration and measurement of chloride content with depth. The validity of the GPR technique was examined by comparing it with the results of the field investigation. Moreover, the correlation of the deteriorated depth with either the relative permittivity or EM wave attenuation was established. Results show that a GPR signal analysis method based on a dual-criteria (relative permittivity and EM wave attenuation) is more effective in analyzing the deterioration characteristics and evaluating the deteriorated depth of concrete bridge decks with asphalt overlay compared to the analysis method based on one of the two GPR properties. Results of the field test are considered to be significant wherein it establishes a relationship between the GPR property and deterioration characteristics of the bridge decks. Moreover, results show the practical applicability of the GPR technique in evaluating the deteriorated depth of the bridge decks with asphalt overlay.