한국어 학습 불안과 성취도 평가 결과의 상관관계 분석

오선경,김지혜 국제한국어교육학회 2019 한국어 교육 Vol.30 No.3

The purpose of this study is to analyze the anxiety of Korean learners and to find correlation with the achievement test in Korean learning. This study was conducted based on the data of 934 students of Korean language institutes in Korea collected by questionnaire. Statistical analysis revealed that learning anxiety had a negative effect on the achievement test in Korean language learning. The results of the sub-factors of the learning anxiety showed the highest level of anxiety about communication, followed by anxiety about negative reaction, anxiety about evaluation and grades, and anxiety due to class environment. There was a statistically significant difference of anxiety between the low-achievement learners and the high-achievement learners. In particular, it was found that the anxiety due to the classroom environment and the anxiety about the evaluation and grade greatly influenced the achievement test.

Antioxidant activity of different parts of Dolsan Leaf Mustard

오선경,김기웅,최명락 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.5

This study aimed to investigate the sinigrin content and antioxidant properties of Dolsan mustard seeds (DMS) and Dolsan leaf mustard (DLM) extracted with 50% acetonitrile. The extracted substances were fractionated by HPLC using a preparative ODS column and then applied to measure sinigirn, total polyphenol (TP), and total flavonoid (TF) contents and antioxidant activities using 2,2- azino-bis(3-ethyl-benzothizoline-6-sulfonic acid) (ABTS), electron donating ability (EDA), and ferric reducing antioxidant power (FRAP) assays. The contents of sinigrin (53.77 mg/g), TP (404.33 mg gallic acid equivalents/g extract), TF (395.33 mg quercetin equivalents/g extract) were higher content in DMS than in DLM. Antioxidant activities of DMS were a slightly higher than DLM. ABTS, EDA, and FRAP assays showed that there was a linear correlation between TP and TF contents and antioxidant capacity. These results suggested that the antioxidant effects of DMS and DLM might be mediated through the TP and TF contents, providing potential source of natural antioxidants.

염색체 이상 환자의 세포 유전학적 연구

오선경,이형환,문신용,장윤석,Oh, S.K.,Lee, H.H.,Moon, S.Y.,Chang, Y.S. 대한생식의학회 1985 Clinical and Experimental Reproductive Medicine Vol.12 No.2

Presented in this paper the data from a chromosome study of 397 patients referred for suspected chromosmal abnormalities. Karyotypes were obtained using short-term blood culture and direct method. Of these 238 patients had normal chromosome complements; 159 (40.1%) patients had chromosome abnormality. Among all patients with chromosome abnormalities, 82.4% (131/159) had aberrations of chromosome number, the others 17.60/0 (28/159\ had aberrations of chromosome structure. Ten had a chromosome rearrangement; Five of them were reciprocal and five Robertsonian translocations. Four patients with pericentric inversions and one with paracentric inversions and four with isochromosomes were observed. There were four patients with marker chromosome, two patients had a chromosome insertion; and three others. (additional abnormal chromosomes.) Thus the results of the present study indicate the importance of cytogenetic evaluation in clinically abnormal patients.

Evaluation of Gastric Motility with Ultrasonography in Conscious Minipigs

오선경,최민철,장진화,정주현 한국임상수의학회 2009 한국임상수의학회지 Vol.26 No.6

The purpose of this study is to evaluate gastric motility of conscious minipigs with ultrasonography from contraction number of the pyloric antrum and gastric emptying time (GET). Five-month-old, clinically healthy minipigs weighing 13.5-15 kg were used for this experiment. Assessment of gastric motility was performed using saline (10 ml/ kg) in all five minipigs. Contraction number of the pyloric antrum for 3 minutes and gastric emptying time were calculated. Gastric emptying time was considered to be the time at which the antral area returned to the basal value. The mean value of contraction number of the pyloric antrum before feeding was 1.60 ± 2.30 (mean ± SD) for 3 min and the overall mean value after saline administration was 5.40 ± 3.62 for 3 min. The mean value of GET by area was 58.06 ± 5.23 min. This data can be used as basic database for evaluation of gastric motility in minipigs as normal and various experimental models.

법랑질에 대한 total etching과 self-etching 접착제의 산부식 효과와 미세인장결합강도

오선경,허복,김현철 大韓齒科保存學會 2004 Restorative Dentistry & Endodontics Vol.29 No.3

The purpose of this study was to evaluate the etching effects and bond strength of total etching and self-etching adhesive system on unground enamel using scanning electron microscopy and microtensile bond strength test. The buccal coronal unground enamel from human extracted molars were prepared using low-speed diamond saw. Scotchbond Multi-Purpose (group SM), Clearfil SE Bond (group SE), or Adper Prompt L-Pop (group LP) were applied to the prepared teeth, and the blocks of resin composite (Filtek Z250) were built up incrementally. Resin tag formation was evaluated by scanning electron microscopy, after removal of enamel surface by acid dissolution and dehydration. For microtensile bond strength test, resin-bonded teeth were sectioned to give a bonded surface area of 1㎟. Microtensile bond strength test was perfomed. The results of this study were as follows. 1. A definite etching pattern was observed in Scotchbond Multi-Purpose group. 2. Self-etching groups were characterized as shallow and irregular etching patterns. 3. The results (mean) of microtensile bond strength were SM; 26.55 MPa, SE; 18.15 MPa, LP; 15.57 MPa. SM had significantly higher microtensile bond strength than SE and PL (p〈0.05), but there was no significant difference between SE and PL.

학술 5 - 소동물 임상에서 CT의 적용

오선경,O, Seon-Gyeong 대한수의사회 2012 대한수의사회지 Vol.48 No.5

학술 4 - 소동물 임상에서 MRI의 적용 2 - 척수질환

오선경,O, Seon-Gyeong 대한수의사회 2012 대한수의사회지 Vol.48 No.7

학술자료 I: 개의 심부전의 방사선학적 검사

오선경,O, Seon-Gyeong 대한수의사회 2011 대한수의사회지 Vol.47 No.3

Flavobacterium multivorum이 생산하는 덱스트란 분해효소의 특성에 관한 연구

오선경 건국대학교 1989 論文集 Vol.29 No.2

Characteristics of dextranase and cloning of the gene of Flavobacterium multivorum which was isolated from soil were studied. Optimum condition for the enzyme activity appeared to be at the 1% concentration of dextran. When NH4NO3ㆍNH4H2PO4 and beef extract was added to the culture media. highest activity of the enzyme was found. In the presence of Mg2+ in culture media, activity of dextranase was somewhat higher, but was inhibited Ca2+. Co2+, Hg2+ and Zn2+. The optimum temperature for the enzyme activity was 45-55℃. In the range of pH 4 to 10, activity of the enzyme appeared approximately similar.

Evaluation of Quality Characteristics of Broth Packets with Different Treatment of Dolsan Mustard Seeds

오선경,최명락 한국생명과학회 2022 생명과학회지 Vol.32 No.9

Dolsan mustard seeds (DMS) were added in whole, crushed, and roasted form at 0.5 g (S-1), 1.0 g (S-2), and 1.5 g (S-3), respectively to broth and heated for 10 or 15 min. After cooling, the quality characteristics were measured. Salinity and pH decreased with boiling time. The antioxidant activities of the experimental broth were measured in terms of total polyphenol content, total flavonoid content, electron donating ability (EDA), 2,2-azino-bis (3-ethyl-benzothizoline-6-sulfonic acid) (ABTS) radical scavenging activity, and ferric reducing antioxidant power (FRAP). The overall, antioxidant activity was higher in broths containing 1.0 g and 1.5 g DMS than in those containing 0.5 g DMS and the activity increased with increasing boiling time. Sinigrin was not detected in the control group, and no significant difference in sinigrin content was noted among broths containing different concentrations of DMS. A high glutamic acid content was detected in the control broth, whereas glutamic acid, aspartic acid, glycine, proline, alanine, and arginine were detected in the broths containing DMS. The free amino acid contents, particularly aspartic acid and glutamic acid contents, were high in umami. Volatile components, such as 2-propenyl-isothiocyanate (ITC), allylthiocyanate, n-butyl ITC, and 3-butenyl ITC, were detected in the DMS-containing broths. Sensory evaluation revealed that a higher amount of DMS added and a longer heating time increased the overall taste preference, and the difference was statistically significant. The purpose of this study was to present basic data on the quality characteristics of DMS-added broths to aid in the development of new products using DMS.