서울화강암과 논산화강암류의 암석화석 및 K-Ar 연대

남경우,이재영 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

On the mineralogical and chemical composition Seoul granite is classified into monzogranite-magnetite series, and Nonsan granitic rocks into granodiorite-magnetite series. They increase in alkali and silica with simultaneous decrease in total iron along the calc -alkaline differentiation trend, however Seoul granite is more differentiated in the trend than the Nonsan granitic rocks. The difference between K-Ar ages (∼157Ma, ∼162Ma) and Rb-Sr ages (∼160Ma, ∼165Ma) of the Seoul granite is only about 3∼8Ma. This may indicatet that the Seoul granite intruded in Jurassic age and might have had a short cooling age. On the other hand the difference between K-Ar ages (∼123Ma, ∼137Ma) and Rb-Sr ages (∼167Ma) of the Nonsan granitic rocks in 30.43Ma, which may indicate a long cooling age for the Jurassic Nonsan granitic rocks.

環境物質의 濃度勾配가 Spirodela polyrhiza 個體群의 生長 및 生産性에 미치는 影響

宋承達,韓甲祚,金義守 慶北大學校 自然科學大學 1985 自然科學論文集 Vol.3 No.-

Effects of the concentration gradients of several environmental ions on S.polyrhiza population were investigated in respect of toxicity and tolerance, growth rate responses, chlorophyll contents. photosynthesis and respiratory activities. Heavy metal ions of Cd, Co, Cu, Cr and Hg showed strong toxicity at 1ppm level on the population growth, whereas the treatment with Pb showed tolerance at 10ppm level. B, Fe and Mn sitmulated the population growth at 0.01∼0.1ppm level, and Hiti restrained the population growth at 100ppm level. The relative growth rate of the population showed a cyclic change with 4 days interval. The maximum RGR was found with 0.01ppm level of B, Mn and Zn. The maximum chlorophyll content attained 102.2mg·g^-1 with 1 ppm Mn treatment and the minimum showed 59.4mg·g^-1 with 1ppm Cu treatment. The maximum photosynthetic rate was 0.40mg O_2·50 fronds^-1·hr^-1 with 1ppm Mn treatment , while no apparent photosynthesis was observed with 1ppm treatments of Cu, Cd and Hg. The maximum and minimum respiratory rates of 0.30 and 0.08mg O_2·50fronds^-1·hr^-1 were observed with 1ppm treatements of Hiti and Mn, respectively.

Plused Spark Chamber의 제작과 그 특성조사

강영호,차병헌 慶北大學校 自然科學大學 1983 自然科學論文集 Vol.2 No.-

A pulsed spark chamber with sensitive area 19cm×19cm and 17 gaps is constructed and its characteristics are investigated. The chamber frame is made by lucite plate and 0.1mm aluminum foil is used for electrode. The side of lucite frame is highly polished to obtain the optical transparency. In the chamber, 99.99% argon gas is filled and gas-flowing method is used for eliminating the contamination of O_2. The clearing field of 150V/cm D.C. is applied for obtaining the clean spark images. The constructed spark chamber has the rise time of 100nsec and the delay time of 0.9㎲ec with operating voltage of 12KV, tracks of the cosmic rays has been photographed and particles can be selectively detected by coincidence circuit with scintillation counter.

東南鑛山의 地質과 鑛床成因에 對한 硏究

徐正律,李在英 慶北大學校 自然科學大學 1983 自然科學論文集 Vol.2 No.-

This work deals with geology and ore deposits at the Dongnam mine. dongnam mine is located at 128°46'∼18°49'E, 37°16'∼37°18'N in Mureong-ri, Nam-myun, Jeongseon-gun, Gangweon-do, Korea. Geology of the mine consists of Cambrian slate(Myobong Formation), Ordovician limestone (Poongchon and Hwajeol Formation), Cretaceous (?) granitic intrusives, and Quaternary alluvium deposits. General trend of strike and dip of bedding plane in sedimentary rocks is N10°∼45°E, 5°∼30°SE, and joints in granitic intrusives strike NS-N30°E, dipping 70°∼80°NW. Main lineament of the study area shows a trend of NNE-SSW. Granitic intrusives, diorite and quarts porphyry, are classified depending on the predominent normative minerals and chemical compositions: diorite into diorite-tonalite-monzodiorite-granodiorite, and quartz porphyry into granite-quartz monzonite-granite. The petrochemical nature of source magma inferred from Niggli value is semi-femic, intermediate alkaline and c-normal for diorite, and salic, alkali-rich and c-poor for quartz porphyry. Sedimentary rocks were thermally metamorphosed by the granitici ntrusives to form mostly albiteepidote hornfels from pelitic Myobons slate and hornblende hornfels from Poongchon limestone. Contact metasomatic deposits of magnetite and hematite were formed in the country rocks in the border zone with the intrusives, hydrothermal Pb-Zn-Mn deposits along the fault shear zoneand a stockwork deposit of molybdenite in the diorite itself. The molybdenite deposit is thought to be formed in the early solidified margin by the residual mineralized solution of the intrusive itself. Molybdenite bearing skarn is plotted in the triangualr diagram of diopside-hedenbergite-johannsenite within the same compositional region as the copper-bearing skarn of general porphyry copper deposits. The wallrock alteration is potassic in diorite and propylitic in quartz porphyry. As shown in ACF and AKF triangular diagrams quartz porphyry belongs to epidote-chlorite-calcite and kaolinite-muscovite-chlorite facies. The sequence and stage of mineralization is: igneous intrusion→skarnization→Fe oxide→Fe sulphide→rhodochrosite→calcite→supergene enrichment of Mn oxide. The Dongnam mine has 4 types of ore deposite: contact metasomatic deposits at the border zone of limestone with the granitic intrusives, hydrothermal filling and replacement deposits along the fault shear zone, and disseminated hydrothermal stockwork deposit in the diorite itself. Main ore minerals are composed mainly of magnetite and hematite in the contact metasomatic deposits, and Mn carbonates, galena, sphalerite and molybdenite in the hydrothermal deposits. Mn oxides are enriched at surface by surpergene oxidation of primary Mn carbonates.

Reliability Estimation of k-out-of-m Systems for the Truncated Exponential Distribution

Lee, In-Suk,Kim, Dal-Ho 慶北大學校 自然科學大學 1983 自然科學論文集 Vol.2 No.-

참고문헌 [2]와 [3]에서 연구한 신뢰성의 최수분산불편추정치를 구한 방법들을 절단된 지수분포 경우에 적용하여 k-out-of-m시스템에 대한 신뢰성의 최수분산불편추정치를 구하였다.

마우스 肝 Alkaline Phosphatase의 分離 및 特性

琴技洙,姜信誠 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

Alkaline phosphatase was purified from mouse liver tissues through the procedures of homogenation, butanol solublization, acetone extraction, Sephadex G-200 and concanavalin A-Sepharose chromatography, and its molecular and kinetic properties were characterized with the following results. The specific activity of liver alkaline phosphatase after affinity chromatography was found to be 11.7 unit/mg of protein with purification factor of 195-fold. The molecular weight of this enzyme was estimated to be about 120,000 composed of two identical subunits. The liver alkaline phosphatase had an optimum pH of 9.6∼10.0, and showed similar thermostability to that of the the other mammalian alkaline phosphatase. The Mg^2+ and Mn^2+ activated the enzyme activity and Ca^2+ showed little effect, whereas Co^2+, Zn^2+ and Cu^2+ decreased the activity. The liver enzyme was competitively inhibited by phosphate ion, but was uncompetitively inhibited by L-phenylalanine and L-homoarginine. Moreover, the inhibitory effect by homoarginine on the liver enzyme was much stronger.

The Enumerative and Phytogeographical Studies of Balsaminaceae and Chloranthaceae in Korea

OH, Soo-Young 慶北大學校 自然科學大學 1985 自然科學論文集 Vol.3 No.-

韓國産 봉선화科와 홀아비꽃대科植物이 어떻게 構成되어 있는가를 알기 爲하여 現在까지 調査報告된 資料를 바탕으로 하여 學名, 異名, 國名, 産地 및 分布等에 對해서 調査하여 본 結果, 봉선화科植物은 1屬, 5種, 2變種 및 2品種 合計 9種類를, 홀아비꽃대科植物은 1屬, 5種임을 얻을 수가 있었다. 韓國産 봉선화科植物 9種類의 特徵을 要約하면 다음과 같다. (1) 韓國特産으로서는 「제주물봉선」, 「처진물봉선」 및 「가야산물봉선」의 1種, 2變種이며 (2) 全韓國分布型에 該當되는 것은 「물봉선」의 1種 (3) 濟州島分布型의 것에는 「제주물봉선」의 1種 (4) 鬱陵島分布型의 것에는 「미색물봉선」의 1品種 (5) 濟洲島를 除外하고 韓國全域에 넓게 分布하는 것은 「노랑물봉선」의 1種 (6) 北韓地域에서만의 分布를 나타내는 것은 「산물봉선」의 1種이다. 韓國産 홀아비꽃대科植物 5種의 特徵을 要約하면 다음과 같다. (1) 韓國特産으로서는 「고려꽃대」의 1種이며 (2) 濟州道分布型에 該當되는 것은 「진주란」의 1種 (3) ??陵島를 除外하고 韓國全域에 넓게 分布하는 것은 「홀아비꽃대」의 1種 (4) 南韓地域에서만의 分布를 나타내는 것은 「죽절초」, 「고려꽃대」「꽃대」 및 「진주란」의 4種이다. The work reported here was taken to clear the taxa of balsminaceae and Chloranthaceae in Korea, their scientific and Korean names, and the distribution of individual species in Korea and the world, based on the references reported by many authors and on the reports obtained by the author. The enumerated taxa of Balsaminaceae and Chloranthaceae in Korea are as follows: Family Balsaminaceae 1) Impatiens aphanatha Hook. Fil. 제주물봉선 2) Impatiens balsamina Linn. 봉선화 3) Impatiens furcillata Hemsley 산물봉선 4) Impatiens hypophylla Makino var. Korean Nakai 처진물봉선 5) Impatiens noli-tangere Linn. 노란물봉선 6) Impatiens noli-tangere f. pallida Hermann 미색물봉선 7) Impatiens textori Miquel 물본선 8) Impatiens textori var. atrosanguinea Nakai 가야물선 9) Impatiens textori f. pallescens (Honda) Hara 환물봉선

Cytological Studies on Two Species of Hosta Ⅰ. Karyotypes of H.minor and H. plantaginea

Seo, Bong-Bo,Song, Nam-Hee 慶北大學校 自然科學大學 1983 自然科學論文集 Vol.2 No.-

Hosta 屬 植物의 種分化硏究의 一還으로 좀비비추와 둥근옥잠화의 核型을 分析하였다. 두 種에서 染色體수는 2n=60으로서 大型, 中型, 小型의 3群으로 染色體를 分類하였다. 두 種間에 中型群에서 核型上의 差異가 있었으며, 染色體形態上 中部에서 次中部로 移行한다고 추정된다. The somatic chromosome numbers and chromosomal composition of two species were ascertained. The karyotype of H. minor were as follows: the 60 chromosomes were in 30 pairs, which could be classified into four pairs of large-sized chromosomes, two pairs of middle-sized ones, and 24 pairs of small-sized ones. In H. Plantaginea, the 60 chromosomes could be divided into 4 pairs of large-sized chromosomes, three pairs of middle-sized ones, and 23 pairs of small-sized ones.

전이금속의 Subsurface States와 그 동력학

손기수,김석환 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

According to Christmann et al., there is one subsurface state on transition metal surface. We modify the kinetics for absorption of hydrogen in transition metals to include the effect of subsurface state. The modified kinetic equations show that the subsurface hydrogen atoms act as valve for admission of hydrogen into the bulk. We obtain the time rates of hydrogen charging and degassing on metal surface. We also get the dependence of the transition temperature on the bulk concentration and that of the subsurface faction on the temperature. The results, being compared with Lagos et al's result, turn out to be good. Furthermore, the transition temperature in this model is also studied.

Effect of Environmental Gradients on the Growth and Primary Productivity of Scenedesmus acutus Population

Song, Seung-Dal,Cho, Moon-Chae 慶北大學校 自然科學大學 1983 自然科學論文集 Vol.2 No.-

綠藻類中 水中生態系에 優占種으로 分布하는 Scenedesmus acutus 個體群의 純粹培養을 通하여 各種 環境物質 또는 汚染物質의 濃度勾配에 따른 個體群의 性長特性 및 生産性에 미치는 影響을 究明하였다. 微量元泰(Fe, Mn, B, Co, Cu 및 Zn)를 各各 1, 5, 10 및 20ppm으로 處理한 結果, 生育期間中 Fe는 20ppm處理區에서, Mn과 B는 10ppm處理區에서 약 50%生長阻害를 보였으나, Co는 1ppm 水準에서, Cu는 5ppm水準에서 그리고 Zn는 10ppm水準에서 生長이 完全히 阻害되었다. 農樂의 處理區에서 Dithan(살균제)은 5ppm水準에서 個體群 生長이 完全히 阻害되었으나, Gusathion(살충제)은 50ppm水準에서 生長의 阻害를 보였다. 合成洗劑의 處理區에서는 퐁퐁과 하이타이는 100ppm水準까지의 高濃度에서 細胞分裂을 促進시켰으며, 500ppm水準에서 生長阻害를 보였다. S. acutus 個體群의 光合成 및 呼吸의 活性은 Co 處理區에서 特徵的 阻害를 보여 5ppm水準에서 光合成이 크게 阻害되었고, 20ppm水準에서는 呼吸活性도 阻害되었다. Cu 處理區는 20ppm에서 光合成과 呼吸活性의 阻害를 보였으나, Zn處理區는 1ppm水準에서 光合成 및 呼吸의 높은 活性이 維持되었고, 20ppm水準에서 阻害를 보였다. pH는 7에서 最大光合成 및 呼吸活性을 보였고, 溫度는 22℃에서 最大光合成量 7mg O^_2.10^9cells/hr을 보였으며 NaHCO_3處理는 0.3%水準에서 最大光合成活性을 보였다.