중학생의 그래프 능력과 논리적 사고력 및 과학 탐구 능력의 관계

김태선,배덕진,김범기 한국과학교육학회 2002 한국과학교육학회지 Vol.22 No.4

본 연구의 목적은 그래프를 작성하고 해석할 수 있는 중학생의 능력을 알아보고, 그래프 능력과 논리적 사고력 및 과학 탐구 능력의 관련성을 분석하여 효과적인 수업전략과 교사의 교수 행동에 대한 시사점을 얻는 데 있다. 중학생 481명을 대상으로 그래프 능력검사지를 이용하여 중학생의 그래프 능력을 알아보고, 논리적 사고력 검사지와 과학 탐구 능력 검사지를 이용하여 그래프 능력과 논리적 사고력 및 과학 탐구 능력의 상관관계를 조사하였다. 그래프 능력과 논리적 사고력 및 과학 탐구 능력의 상관관계를 조사한 결과, 변인 통제 논리와 비례 논리가 그래프 능력과 관련이 깊은 것으로 나타났다. 그리고 그래프 능력은 논리적 사고력 및 과학 탐구 능력과 대부분 유의한 정적 상관을 보이지만, 통계적으로 상관은 낮았다. 이러한 연구 결과에 비추어볼 때, 앞으로 과학 교사는 중학생의 그래프 능력을 향상시키기 위해 그래프의 중요성을 인식하고, 학생들이 그래프를 작성하고 해석할 수 있는 능력과 변인 통제 논리, 비례 논리 등 논리적 사고력을 향상시킬 수 있도록 체계적인 노력과 효과적인 수업전략이 필요하다고 본다. The purpose of this study was to investigate the relationships of graphing abilities to logical thinking and science process skills of middle school students. The subjects for this study were selected 481 students form four middle schools for TOGS(the Test of Graphing in Science), GALT(Group Assessment of Logical Thinking) and TIPSⅡ(Test of integrated Process Skills). This study shows that the correlation coefficient between abilities of students to construct/interpret graphs and the logical thinking was 0.45, and the correlation coefficient between abilities to construct/interpret graphs and science process skills are 0.32. As a result, abilities of students to construct and interpret graphs are more correlate the logical thinking than science process skills.

한국어 형태소 처리와 사전 : 접속정보를 이용한 한글 철자 및 띄어쓰기 검사기 Hangul Spelling and Word-spacing Checker Using the Connectivity Information

김덕봉,최기선,강재우 서울대학교 어학연구소 1990 語學硏究 Vol.26 No.1

This paper describes the Hangul spelling and word-spacing checker, HSPELL. HSPELL was implemented in C and runs under UNIX^TM 4.3 BSD. The system finds spelling or word-spacing errors in the text of written Hangul and points out it by batch mode. For this processing, HSPELL uses the connectivity information between morphemes and the dictionary with 7,000 morphemes. In this paper, a morphological analysis method called shortest match strategy is proposed for the Hangul spelling and wordspacing checking. This method allows efficient search for separable morphemes in a word phrase.

고지방식이가 운동시 흰쥐의 글리코겐 이용에 미치는 영향

민경선,장응찬,김형렬,민진아,신덕수 慶山大學校 2000 論文集 Vol.18 No.1

Carbohydrate and fat ingestion during exercise are essential nutrient, but a number of opinion is different from their contents of food. In this point of view, to study how high-fat dietary contents affects glycogen utilization, 48 female Sprague-Dawley rats were trained on the treadmill trained for 4wk with consuming two high-fat diet and one high-carbohydrate diet. All animals were fed 79%high-fat diet(n=16, 79F), 40% high-fat diet(n=16, 40F), 70% high-carbohydrate diet(n=16, 70C). After the final day of training, one-half of rats in each the three groups were run to exhaustion (E), whereas the remaining rats served as rested controls (R). All animals were trained on a motorized rodent treadmill. The animals ran for 30min/d at 28m/min(0% grade), analysis items were glycogen, body weight and %Fat were measured. All data were examined by means of one-way ANOVA and significance was set at the p<0.05. The Duncan method was used for a post hoc test. Body weight were similar among the 79F, 40F and 70C groups. %Fat was significantly greater in animals that consumed the 79F group than in those on the 70C group (P<0.05), even though similar body weight each other. Generally liver and muscle glycogen concentration had more in 79FR, on the other hand, had less in 79FE compared with the others. The mean overall glycogen utilization rate was depressed in muscle and liver after animals were on the 79% F diet. In summary, the present study has suggested that consumption of 79% F diet during endurance training can lead to an increase in exercise performance in female rats. Some of the consequences training on F diet are an increase in body fat deposition and slower utilization of glycogen during exercise. These data indicate that rats exposed to a high-fat diet are capable of prolonging exercise in spite of limited glycogen stores. This improved capacity for exercise appears to be partially the result of muscular adaptations to the diet, which apparently increase the ability to oxidize fat and concomitantly spare glycogen.

더덕의 효율적인 재분화 및 뿌리발달

심주선,조숙녀,손화,김무성,노영덕,김세영,양덕춘 경희대학교식량자원개발연구소 2005 硏究論文集 Vol.24 No.-

더덕은 식용, 관상용, 생약재료로 쓰이는 방향성 식물이다. 본 연구는, 종자의 기내배양을 통하여 식물체 재분화와 뿌리발달을 실험했다. 종자의 발아는 GA_(3) 100 mg·L(-1)처리와 저온처리 시 매우 양호하였다. 더덕의 기내에서 shoot의 형성은 2 mg·L^(-1) BA, 2 mg·L(-1) NAA가 첨가된 MS 기본배지에서 가장 양호하였으며, 줄기의 절편체와 비교하여 잎 절편체에서 재분화가 잘되었다. 또한 뿌리의 발육은 계속적인 계대배양에 의해서 양호하였는데 shoot의 길이를 1 cm 정도 남긴 뿌리를 연속적으로 4회 계대배양에서 뿌리가 주근으로 발육하였으며 길이는 약 3 cm 및 직경은 0.5 cm의 정상적인 뿌리를 얻을 수 있었다. Codonopsis lanceolata is widely used as edibles, ornamental plant and crude drug material. This study was carried out to confirm the ratio of germination and efficient differentiation of shoot and root in vitro. The germination of Codonopsis lanceolata seed was excellent in the medium with GA_(3) 100 mg·L(-1) and chilling treatment. The shoot formation of Codonopsis lanceolata was good at the MS medium with 2 mg·L(-1) BA and 2 mg·L(-1) NAA. According to inoculum part, ratio of re-differentiation was higher from the leaf explant compared with the stem explant. For root development, successive subculture with 1 cm shoot of upper part from root was efficient. Roots of Codonopsis lanceolata cultured in vitro system was grown like normal root with length of 3 cm and thickness of 0.5 cm at the 4 successive subcultures.

제주도 인구이동 특징분석

한창후,김태일,양덕순,吉田 友彦,박철민 제주대학교 공과대학 첨단기술연구소 2002 尖端技術硏究所論文集 Vol.13 No.2

This study focused on population movement and based on a hypothesis that population movement has been influenced by construction of road and development of housing lot etc. It has been expecially influenced by construction of road. In this study, population and housing census data(1970-2000)were used as a analysis of data and Arcview GIS for simulation of relation between road and distribution of population change in Jeju. As result of analysis, population has been concentrated around Jeju city and index of primacy (rate of difference of population size) between Jeju and Sogwipo is twice

인삼 Peroxidase(PgPrx3) 유전자의 분리 및 연초의 형질전환

손화,심주선,김세영,노영덕,김무성,양덕춘 경희대학교식량자원개발연구소 2005 硏究論文集 Vol.24 No.-

Peroxidase는 항산화에 관련된 효소이며 식물의 환경스트레스와 성장에 관련되는 중요한 유전자이다. 본 실험에서 사용된 Peroxidase Ⅲ의 cDNA는 Panax ginseng C.A. Meyer 잎에서 추출하였으며 PgPrx3라 명명하였다. 이 gene의 ORF영역은 1,065 bP이고 355개의 아미노산을 가지고 있다. BioEdit 프로그램을 이용하여 PgPrx3와 다른 식물의 peroxidase gene과 비교한 결과 상동성을 가지고 있었으며, Spinacia oleracea(70%), Vigna angulais(71%), Nicotiana tabacum(69%) and Linum usitatissimum(65%). 그중 Vigna angularis의 상동성이 가장 높았다. 담배에 본 유전자를 형질전환시켜 유전자의 특성을 검정하기 위하여 35S/35S/AMV/peroxidas/Tnos를 벡터 pRD400에 재조합 후 아그로박테리아를 이용하여 담배에 도입시켰다. 그리고 PCR를 이용하여 유전자 PgPrx3가 담배에 도입된 것을 확인하였으며, RT-PCR로 정상적으로 PgPrx3 유전자가 전사되어 RNA를 생성하고 있음을 확인하였다. A peroxidase (E.C. 1.11.1.7) is very important enzyme as antioxidants. The function of this gene is connected with growth and environmental stress of plant. A class Ⅲ peroxidase cDNA was isolated from the leaf of Panax ginseng C.A. Meyer and named as PgPrx3 which is consisted of an ORF (open reading frame) of 1,065 bp and an amino acid of 355 residues. BioEdit software was used to compare the PgPrx3 amino acid sequence with other plants that showed homologies with Spinacia oleracea (70%), Vigna angularis (71%), Nicotiana tabacum (69%) and Linum usitatissimum (65%). The peroxidase of Vigna angulatis was the most homologous with ginseng. The chimeric PgPrx3 gene, 35S/35S/AMV/peroxidas/ Tnos, was constructed in the binary vector pRD400. Agrobacterium tumefaciens strain LBA4404 harboring disarmed Ti-plasmid was used to transform Nicotiana tabacum L. using the leaf disc. Incorporation of the chimeric gene PgPrx3 into plants were confirmed by PCR analysis of genomic DNA and RT-PCR analysis of mRNA from transgenic tobacco. The PgPrx3 gene from ginseng was stably expressed in transgenic tobacco plants.

접사함요에서 기원한 후비공 용종 1례

김중강,신무진,류태선,오춘석,김덕준 啓明大學校 醫科大學 1994 계명의대학술지 Vol.13 No.4

Choanal polyps can be defined as paranasal sinus polyps that pass through sinus ostia and protrude into the boundary between the nasal cavity and nasopharynx-the choana. The most common choanal polyp is the antrochoanal polyp, but sphenochoanal and ethmoidochoanal polyps are rarer. We experienced a case of choanal polyp originating from the nasal mucosa of the sphenoethmoid recess, not from the paranasal sinuses. It was removed with intranasal endoscopy, and 6 months follow-up has not shown any recurrence. So we report this very rare case with review of literatures.

흰쥐 Kupffer 세포에 대한 Propofol의 작용

박세훈,지대림,성언기,김희선,송인환,박희영,김준수,이덕희,박대팔 대한마취과학회 2002 Korean Journal of Anesthesiology Vol.43 No.4

Background: Propofol has an antioxidant capacity and can be used for ischemia-reperfusion injury of the liver. However, the effects of propofol on the Kupffer cells have not been establisked. Methods: Kupffer cells were isolated and cultured from male Sprague-Dawley rats. The effects of propofol on the Kupffer cells were evaluated by a phagocytosis assay, TNF-α gene expression, and superoxide anion release after administering propofol in different concentrations on the cultured Kuprrer cells. Results: The latex bead phagocytosis by the Kupffer cells was suppressed when the Kupffer cells were exposed to propofol irrespective of concentrations. Higher propofol concentrations decreased the loss of Kupffer cells after latex bead phagocytosis. Propofol induced TNF-α mRNA expression in the Kupffer cells, but the mRNA expression level after 50㎍/ml of propofol decreased. The pattern of TNF-α mRNA expression induced by propofol was different to that induced by LPS: TNF-α mRNA was expressed continuously in the propofol-treated cells until 16 hours after exposure to propofol, whereas the level of TNF-α mRNA expression induced by LPS was evident after 2 hours and was not found thereafter. TNF-α production after propofol treatment was not higher than that of the control. Formazan presipitation did not show any qualitative differences between cells untreated or treated with propofol concentrations of 0.5, 5.0, and 50 ㎍/ml. Conclusions: These results showed that propofol might inhibit Kupffer cells. This suggests that propofol and be used for patients with ischemia-reperfusion injury of the liver. (Korean J Anesthesiol 2002; 43: 475~484)

Paraquat 중독환자의 초기검사로서 sodium dithionite를 이용한 소변내 paraquat검출의 임상적 의의

윤갑준,임경수,이진웅,김영식,이부수,박덕우,김선만,이강현,황성오,안무업 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1

Background : Mortality from paraquat intoxication depends upon plasma paraquat concentration. To know the severity of paraquat intoxication is important for directing therapeutic modality and predicting prognosis. Sodium dithionite test for urinary paraquat provides an easy and simple method to determine the severity of paraquat intoxication in emergency department. purpose : To determine whether the result urinary paraquat test by sodium dithionite can predict outcome in patients with paraquat intoxication in emergency department. Subjects : 48 patients(male 31, female 17, mean age 37 years) who had exposure to paraquat and presented within 24 hours after exposure. Result : Thirty five patients were positive in paraquat urine test and thirteen patients were negative. Clinical manifestations were more severe in positive patients than in negatives. Complication was much more in positives than in negatives. 28 of 35 patients(80%) in positives and 2 of 13 patients(15%) in negatives died. Conclusion : Positive test for urinary paraquat is associated with high mortality and morbidity from paraquat intoxication, and qualitative test for urinary paraquat by sodium dithionite is an useful method to determine the severity of paraquat intoxication in emergency department.

Original Article : Clinical Outcomes of Initial and Repeated Nasolacrimal Duct Office-Based Probing for Congenital Nasolacrimal Duct Obstruction

( Deok Sun Cha ),( Hwa Lee ),( Min Soo Park ),( Jong Mi Lee ),( Se Hyun Baek ) 대한안과학회 2010 Korean Journal of Ophthalmology Vol.24 No.5

Purpose: To characterize the outcomes of initial and repeated office-based probing as a primary treatment for congenital nasolacrimal duct obstruction (CNLDO) in children. Methods: The medical records of patients who underwent nasolacrimal duct office-based probing for CNLDO between March 2004 and January 2008 were reviewed retrospectively. Nasolacrimal duct probing was performed on 244 eyes from 229 consecutive patients with CNLDO. Patients who were refractory to the first probing underwent a second probing 4 to 8 weeks later. Results: Based on exclusion criteria, 244 eyes from 229 patients (117 males and 112 females), aged 6 to 71 months (mean, 12.4 ± 8.36) were included. The success rate of the initial probing was 80% (196 of 244) for all patients, 82% (111 of 136) in the 6 to 12 month age group, 79% (64 of 81) in the 13 to 18 months age group, and 78% (21 of 27) among individuals older than 19 months (p = 0.868, Pearson chi-square test). The success rate of the second probing was 61% (25 of 41) for all patients, 74% (17 of 23) in the 6 to 12 months age group, 58% (7 of 12) in the 13 to 18 months age group, and 17% (1 of 6) among individuals older than 19 months (p = 0.043, Fisher`s exact test). Conclusions: While the success rate of initial nasolacrimal duct probing is not affected by age, the rate of success rate with a second probing was significantly lower in patients older than 19 months. Based on the results, authors recommend further surgical interventions, such as silicone tube intubation or balloon dacryocystoplasty, instead of repeated office probing for patients older than 19 months, if an initial office probing has failed.