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Study on the reaction crystallization of silver chloride in Rushton type semi-batch reactor (Rushton type 반회분식 반응기에서 염화은 반응성 결정화에 관한 연구)

  • 이종석;김우식
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.6 no.4
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    • pp.609-619
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    • 1996
  • Experimental study on effects of factors on the reaction crystallization of silver chloride in rushton type reactor. The size and size distributions of the silver chloride crystals were observed to be markedly affected by the agitation speed of solution, and feeding rate, feeding mode and concentration of reactants. From experimental data it was inferred that in the reaction crystallization of silver chloride the supersaturation level of silver chloride and concentration of excess ions in the solution, and mass transfer rate around the crystals were implicitly interrelated with factors and directly affected on the crystal nucleation and grwoth processes. However, the morphology of the silver chloride crystal was not changed by factors.

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양명(陽明)의 『중용(中庸)』 관(觀) 연구(硏究) - 『전습록(傳習錄)』을 중심으로 -

  • Im, Hong-Tae
    • (The)Study of the Eastern Classic
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    • no.54
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    • pp.7-44
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    • 2014
  • 왕양명 철학의 개념과 구조는 "대학"과 밀접한 관계를 맺고 있다. 왕양명은 "대학"에 대한 새로운 해석을 시도하여 마침내 주희의 "대학" 해석과는 다른 자신만의 학문 체계를 형성하기에 이른다. 이와 더불어 그는 "중용"에 대한 해석에 있어서도 희노애락 등 감정의 미발이발과 중화 등 "중용"의 개념 설명에서 주자와는 다른 견해를 제시하고 있다. 왕양명은 "대학"과 "중용"의 관계에 대해 "자사가 "대학" 전체의 뜻을 총괄하여 "중용"의 첫 번째 장을 지었다."고 평가할 만큼, 왕양명 사상에 있어 "대학"과 "중용"은 매우 긴밀한 관계를 맺고 있다 하겠다. "대학"과 "중용"은 공부 방법에 있어 같은 목적을 추구하고 있으니, "대학"은 성의 공부를 통하여 지선한 경지에 오르는 것을 추구하고 있으며, "중용"은 성신 공부를 통해 지성의 경지에 도달하는 것을 추구하고 있다. 이와 같이 "대학"과 "중용"은 성실하게 한다[성(誠)]는 하나의 공부를 통해 지극한 경지에 오르는 것을 공동의 목표로 삼고 있는 것이다. 이처럼 양명에게 있어 "대학"과 "중용"은 서로 분리하여 말할 수 있는 대상이 아니다. 양명의 "중용" 관련 언급 가운데 가장 많은 분량을 차지하고 있는 것은 "중용"1장에 관해서이다. "중용" 1장은 "대학"의 전체 의미를 포괄하고 있기 때문이다. "중용"에서는 성(誠)이라는 개념을 통해 본체와 공부를 설명하고 있다. 양명은 "중용" 1장을 풀이하면서 본체에 대한 깨달음보다는 수도 공부를 통해 본체를 파악하는 공부를 중시하는 입장을 취하고 있다. 그는 이러한 수도 공부로 '경계하여 삼가면 두려워한다'는 계신공구를 제시하고 있으니, 양명에게 있어 계신공구는 신독이고 치중화이며 치양지 공부에 다름아니다. 여기에서 양명은 "중용"의 공부 방법을 "대학"의 그것과 연관시키고 있음을 알 수 있다.

Changes in Lipid Components during Barley Koji Preparation (보리 코오지 제조중(製造中)의 지질성분(脂質成分)의 변화(變化))

  • Lee, Sang-Hwa;Kim, Ze-Uook
    • Applied Biological Chemistry
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    • v.29 no.2
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    • pp.138-147
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    • 1986
  • Barley koji was made in order to investigate the lipid contents of barely koji during preparation. Diethyl ether extracts and 85% methanol extracts were extracted and purified. The lipid components were classified. The individual neutral lipids, glycolipids and phospholipids were fractionted, quantified and fatty acid compositions of the three lipids were determined. Total lipid contents of diethyl ether and 85% methanol extract of barley koji increased during preparation. Neutral lipid, glycolipid and phospholipid contents in diethyl ether extract increased, however, neutral lipid, glycolipid and phospholipid contents in 85% methanol extract decreased during koji preparation. TG content of the neutral lipid in diethyl ether extract decreased. Conversely, DG, FS, FFA and ES contents increased. But TG, DG and FS contents of the neutral lipid in 85% methanol extract decreased. LPC, (PC+PS), PI, PG and PE contents of the phospholipid on diethyl ether extract increased. But LPC, (PC+PS), PE and PI contents in 85% methanol extract decreased during koji preparation. Palmitic acid, linoleic acid and linolenic acid of neutral lipid in diethyl ether extract decreased, however, palmitic, stearic, oleic, linoleic acid in 85% methanol extract decreased. Palmitic acid, stearic acid, oleic acid and linoleic acid of glycolipid in diethyl ether extract increased, but in 85% methanol extract they decreased except oleic acid. Palmitic, stearic, oleic, linoeic and linolenic acid of phospholipid in diethyl ether extract increased during koji preparation. On the other hand palmitic, oleic and linoleic acid in 85% methanol extract decreased but stearic and linoleic acid increased.

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Reproductive Growth and Competitive Ecology of Arrowhead(Sagittaria trifolia L.) - 1. Growth and Tuber Formation of Arrowhead under Several Environmental Factors (벗풀(Sagittaria trifolia L.)의 번식생장(繁殖生長) 및 경합생태(競合生態) - 1. 벗풀의 번식생장(繁殖生長))

  • Han, S.S.
    • Korean Journal of Weed Science
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    • v.13 no.2
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    • pp.138-150
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    • 1993
  • Experiments were carried out to understand how much do the environmental factors affect growth and tuber formation of arrowhead, Sagittaria trifolia L. The more the light transmittance decreased, the more the numbers of leaves and floral axes decreased. The dry matter weight of tops and the number and the fresh weight of formated tuber were significantly different between the light transmittance of more than 50% and that of less than 30% at the 5% level of DMRT. Plant height, number and width of leaves, and number of floral axis were affected by the Light spectra. And the degree of their effects on growth of arrowhead was different form the light spectrum. The natural light and the clear cellophane film were the most effective to increase the number and the fresh weight of formated tuber and the green spectrum was the least effective to do those. Plant height grown at 0-5cm water depth was shorter than that at 10-20cm water depth. The deeper the water depth was, the lower the leaves number was. The fresh weight and the number of arrowhead tuber were most produced at 0cm water depth and theose were least at 20cm water depth. The shoot growth and the tuber formation of arrowhead was much increased with increase of the application rate of fertilizer. The difference of the transplanted tuber size was not affected at the shoot growth, but tuber formation of arrowhead was increased with increase of the transplanted tuber size. From viewing the effect of temperature after rice heading, the shoot growth and the tuber formation at $35^{\circ}C$ were also higher than those at $25^{\circ}C$.

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당말녕(糖末寧)을 위주(爲主)로 당뇨병(糖尿病)의 주위신경병변(周圍神經病變)을 치료(治療)하는 임상연구(臨床硏究)

  • 우세가
    • Journal of Haehwa Medicine
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    • v.5 no.2
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    • pp.501-501
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    • 1997
  • 당뇨병성(糖尿病性) 주위신경병변(周圍神經病變)은 당뇨병(糖尿病)에서 가장 많이 볼 수 있는 삼대합병증(三大合倂症) 중(中)의 하나이다. 환자(患者)의 임상표현(臨床表現)은 사고(四股) 및 구간부(軀幹部)가 마목(麻木)하고,동통(疼痛)이 칼로 베는 듯하거나 침(鍼)으로 찌르는 듯하여 참기 힘들며, 환자(患者)로 하여금 작업능력(作業能力)을 상실(喪失)하게 하고 휴식(休息)과 수안(睡眼)에 엄중(嚴重)한 영향(影響)을 준다. 지금까지 국내외(國內外)에서는 아직 효과적(效果的)인 치료방법(治療方法)이 없다. 우리는 임상(臨床)에서 관찰(觀察)해 본 결과(結果), 이 병(病)의 임상표현(臨床表現)인 "사고마목(四股麻木), 자통(刺痛), 야간가중(夜間加重), 통처고정(痛處固定)"의 특징(特徵)이 중의임상(中醫臨床)에서 표현(表現)되는 "혈어형(血瘀型)" 동통(疼痛)과 완전(完全)히 상동(上同)하였다. 우리는 "활혈화어(活血化瘀), 통락지통(通絡止痛), 거어생신(祛瘀生新)"을 치료원칙(治療原則)으로 중약복방(中藥復方) 제제(制劑) "당말녕(糖末寧)"을 제조(製造)하여 이 병(病)을 치료(治療)하는데 만족(滿足)스러운 임상치료효과(臨床治療效果)를 거두었다. 전체(全體)의 병례(病例)는 모두 우리 과(科)의 입원환자(入院患者)로써 모두 45례(例)인데, 병기(病機)에 따라 양조(兩組)로 나누었다. 관찰조(觀察組) 30례(例) 중(中)에는 남성(男性)이 19례(例)이고 여성(女性)이 12례(例)이며, 年齡(연령)은 25세(歲)에서 68세(歲)까지로 평균연령(平均年齡)이 49.8세(歲)이다. I형(型) 당뇨병(糖尿病)이 10례(例)이고 II형(型) 당뇨병(糖尿病)이 20례(例)이며, 당뇨병(糖尿病)의 병정(病程)은 6개월(個月)에서 17년(年)사이로 평균(平均) 7.1 년(年)이다. 주위신경병변(周圍神經病變)의 병정(病程)은 2주(周)에서 3년(年)까지로 평균(平均) 1년(年)이다. 대조조(對照組)는 15례(例)로 남성(男性)이 8례(例)이고 여성(女性)이 7례(例)이며, 연령(年齡)은 20세(歲)에서 65세(歲)까지로 평균(平均) 49세(歲)이다. I형(型) 당뇨병(糖尿病)이 7례(例)이고 II형(型) 당뇨병(糖尿病)이 8례(例)이며, 橋民病의 병정(病程)은 3개월(個月)에서 12년(年)까지로 평균(平均) 7.5년(年)이다. 주위신경병변(周圍神經病變)의 병정(病程)은 1개월(個月)에서 3년(年)까지로 평균병정(平均病程)은 11.6개월(個月)이다. 양조(兩組)사이의 병정(病程)은 현저(顯著)한 차이는 없으나 서로 비교(比較)해 볼만하다. 당말녕(糖末寧)은 주(主)로 삼궁(三芎),원호(元胡), 당귀(當歸), 계혈승 등(等)의 약물(藥物)로 조성(組成)되었고, 약제실(藥劑室)에서 濃縮液(농축액)(매(每) ml당(當) 생약량(生藥量) 2.5g 함유(含有))으로 제조(製造)하였다. 관찰조(觀察組)는 매차례(每次例) 당말녕(糖末寧) 50ml를 하루 세번씩 복용(服用)하였고; 대조조(對照組)는 비타민 $B_1$, 비타민 $B_6$을 각각(各各) 20mg씩 하루 세차례 복용(服用)하였다. 양조(兩組) 모두 사주(四周)를 한번의 치료료정(治療療程)으로 하였다. 우리는 모두 45례(例)의 환자(患者)를 관찰(觀察)하였는데, 그 중(中) 관찰조(觀察組)가 30례(例)이고 대조조(對照組)가 15례(例)이다. 임상표현(臨床表現) 분급(分級)과 신경근전도(神經筋電圖)(운동신경(運動神經)과 감각신경(感覺神經)의 전도(電圖) 속도(速度))를 치료(治療) 전(前)과 후(後)의 대조지표(對照指標)로 하였고. 매(每) 4주(周)를 한개의 료정(療程)으로 총(總) 1-2개(個)의 료정(療程)을 진행(進行)하여 比較硏究(비교연구)하였다. 총유효율(總有效率)은 96.7%이고 총현효율(總顯效率)은 50%로써 대조조(對照組)보다 뚜렷하게 높았다. 치료전(治療前) MNCV와 SNCV를 측정(測定)한 것은 당말녕(糖末寧)이 당뇨병(糖尿病) 주위신경병변(周圍神經病變) 환자(患者)의 신경전도속도(神經電圖速度)를 명확(明確)하게 개선(改善)하였음을 표현(表現)하고 있다. 신경근전도(神經筋電圖)에서 자발전위(自發電位)는 눈에 띄게 감소(減少)되고 소력수축(小力收縮)의 평균시한(平均時限)은 명확(明確)히 연장(延長)되었으며 다상전위(多相電位)는 명확(明確)하게 증가(增加)되었는데, 이는 신경지측(神經支測)이 재생(再生)되고 회복(恢復)하였음을 설명(說明)하고 있다. 중약복방제제(中藥復方制劑) "당말녕(糖末寧)"이 본병(本病)을 치료(治療)하는 기전(機轉)은 여러 방면(方面)일 것이다. 그 중(中) 微循環(미순환)을 개선(改善)하고 적혈구(赤血球)의 변형성(變形性)을 향상(向上)하여 신경세포(神經細胞)에 혈액(血液)과 산소공급(酸素供給) 및 영양공급(營養供給)을 향상(向上)함으로써 神經損傷(신경손상)의 수정(修整)과 회복(恢復)을 촉진(促進)하는 것이 주요(主要)한 일환(一環)이 될 것이다.

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Topographic Characteristics, Formation and Classification of Soils Developed in Limestone -II. Clay Mineralogical Properties, Formation and Classification of Limestone Soils from Yeongweal Area of Gangweon-Do (석회암(石灰岩) 토양(土壤)의 지형적(地形的) 특성(特性)과 생성(生成) 및 분류(分類) -II. 강원도(江原道) 영월지역(靈越地域) 석회암(石灰岩) 토양(土壤)의 점토광물특성(粘土鑛物特性)과 생성(生成) 및 분류(分類))

  • Jung, Sug-Jae;Kim, Tai-Soon;Kim, Young-Ho;Moon, Joon
    • Korean Journal of Soil Science and Fertilizer
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    • v.23 no.1
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    • pp.1-7
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    • 1990
  • Clay mineralogical properties, soil formation and classification for the limestone derived soil were discussed from the 4 soil series, Pyeongchang, Anmi, Yulgog, and Mungyeong, distributed over the area of Bangjeol-Ri, Yeongweol-Eup, Gangweon-Do. The results are as follows; 1. Kaolinite and Al-interlayered vermiculite were the main clay minerals and other minerals were illite, vermiculite, and chlorite. 2. CEC of topsoil ranged from 10.5 to 22.9me/100g and that of sub-soil ranged from 10.0 to 23.8me/100g. CEC seemed to be increased with descending from topograpical position and had slightly significant positive correlation. 3. Lithologic changes as a runction of soil depth showed smooth change for Pyeongchang, discontinuity for Anmi, unpredictability for Yulgog, and uniformity for Mungyeong series. 4. According to the new system of soil taxanomy Pyeongchang series was classified as Typic Hapludalfs, Anmi as Fluventic Eutrochrepts, Yulgog as Fluvaquentic Eutrochrepts, and Mungyeong as Aeric Haplaquepts.

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Effect of Aerial Part Cutting on Growth and Root Yield of Achyranthes japonica (地上部 切斷이 쇠무릎의 生育 및 뿌리 收量에 미치는 影響)

  • Jang, Kye-Hyun;Lee, Young-Ho
    • Korean Journal of Plant Resources
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    • v.10 no.1
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    • pp.45-49
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    • 1997
  • This experiment was carried out to know the effects of aerial part cutting on the growth and root yield of Achyranthes japonica. The various cutting treatments were tested. Cutting treaments were 20cm and 30cm cutting from the apical part of plant, when plant height was 30cm and 50cm, respectively. The seed amount was the largest at non-cutting, indication that cutting treatment inhibits fruiting. The most effective treatment for the root growth was 30cm cutting just before flowering time. Cutting just before flowering time increased root diameter, length and root weight comparing with non-cutting.

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Effect of Vitamin E and Selenium on the Lipid Composition in Serum and Liver of Rats (비타민E와 셀렌이 흰쥐의 혈청(血淸) 및 간장(肝臟)중의 지질성분(脂質成分)에 미치는 영향(影禦))

  • Kim, Seun-Yeung;Cho, Soo-Yeul
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.14 no.1
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    • pp.33-38
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    • 1985
  • This experiment was undertaken to investigate ana to compare the effect of vitamin E and selenium on the lipid composition in serum and liver of rats. Net weight gain and food efficiency ratio were elevated by supplementation with selenium and/or vitamin E. The weight of kidney, heart and lung were not affected by the diets. However, liver weight was slightly decreased by supplementation with vitamin E and/or selenium and spleen weight was significantly decreased only by vitamin I supplementation. No differences in serum level of total lipid were found in all groups. Serum cholesterol level was significantly decreased, but the levels of triglyceride and free fatty acid in serum were increased by vitamin E supplementation. Contents of crude lipid, cholesterol, free fatty acid, and triglyceride in liver were significantly decreased by supplementation with vitamin E and/or selenium. In fatty aicd composition of liver, the percentage of linoleic acid(18:2) was the lowest in the selenium-Supplemented group and the significantly lower percentage of arachidonic acid(20:4) was found in the vitamin E and/or selenium-supplemented group in comparision to the deficient basal group.

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Lipid and Fatty Acid Compositions of Korean Corns (한국산(韓國産) 옥수수의 지질성분(脂質成分)에 관(關)한 연구(硏究))

  • Chun, Ho-Nam;Choi, Kap-Seong;Kim, Ze-Uook
    • Applied Biological Chemistry
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    • v.29 no.2
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    • pp.122-129
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    • 1986
  • The lipid compositions of corns produced in Korea were analyzed. Free and bound lipids of the corn kernels were fractionated, quantitated and compared by silicic acid column, thin layer and gas liquid chromatography. Corn kernels contained 5.02% total lipids, which is consisted of 4.09% free lipids and 0.93% bound lipids. Free lipids comprised of 89.61% neutral lipids, 3.75% glycolipids and 6.40% phospholipids, while bound lipids contained 14.26% neutral lipids, 46.06% glycolipids and 37.18% phospholipids. In the neutral lipids of free lipids, triglycerides were predominant (67.68%) and minor components such as esterified sterols, free sterols, free fatty acids, 1,3-diglycerides, 1,2-diglycerides were present. But in the neutral lipids of bound lipids, esterified sterols were not present and the contents of triglycerides were lower (47.68%) and free fatty acids were higher than those of free lipids. Among the phospholipids in free and bound lipids, phosphatidyl choline and phosphatidyl serines and phosphatidyl inositols were also present as minor components. The major fatty acids in the three lipid classes were linoleic, oleic and palmitic acids.

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Microfluidic System for the Measurement of Cupric Ion Concentration using Bilayer Lipid Membrane on Silver Surface (은 표면의 이중층 지질막에 의한 구리 이온 농도 측정용 마이크로플루이딕 시스템)

  • Jeong, Beum Seung;Kim, Do Hyun
    • Korean Chemical Engineering Research
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    • v.48 no.1
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    • pp.33-38
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    • 2010
  • A microfluidic system has been developed using biomaterial for the measurement of cupric ion concentration. The cell-membrane-mimicking bilayer lipid membrane(BLM)-coated silver electrode was used for the sensing of cupric ion concentration. The silver-supported BLM could increase its stability. A silver-supported bilayer lipid membrane(s-BLM) was easily obtained using its self-assembling characteristics by immersing silver wire into lipid(phosphatidylcholine; PC) solution and then dipping into aqueous KCl solution. These s-BLMs were used to determine the relationship between $Cu^{2+}$ concentration and current crossing s-BLM. Their relationship showed high linearity and reproducibility. The calibration curve was constructed to express the relationship between $Cu^{2+}$ concentration and current in the $Cu^{2+}$ concentration range of 10 and $130{\mu}M$. This calibration curve was used to measure $Cu^{2+}$ concentration in an unknown sample. Microfluidic system with s-BLM was made of PDMS(polydimethyl siloxane) using typical soft photolithography and molding technique. This integrated system has various functions such as activation of the silver surface without cutting silver wire, coating of BLM on silver surface, injection of KCl buffer solution, injection of $Cu^{2+}$ sample and measurement of $Cu^{2+}$ concentration in the sample.