환삼덩굴 잎과 줄기의 화학성분

허재연,정창호,심기환 경상대학교 농업생명과학연구원 2003 농업생명과학연구 Vol.37 No.1

기능성 식품재료로서 환삼덩굴의 줄기와 잎의 이용성을 향상시킬 목적으로 암, 수로 구분하여 화학성분을 분석하였다. 일반성분 중 가용성 무질소물과 조단백질 함량은 잎에서 높게 나타났으며, 수분과 조섬유는 줄기에서 높게 나타났고, 줄기와 잎의 주요 무기성분은 K, Ca, P 및 Mg으로 나타났다. 유리당을 분석한 결과 숫잎과 암잎에서 fructose는 각각 0.16%와 0.10%로 나타났으며, 숫줄기와 암줄기에서 sucrose는 각각 0.37%와 0.24%로 나타났다. 비휘발성 유기산을 분석한 결과 acetic acid가 잎(4.99 mg%와 3.07 mg%)과 줄기 (3.18 mg%와 2.25 mg%)에서 가장 많이 함유되어 있었으며, lactic acid, succinic acid 및 formic acid 순으로 함유되어 있었다. 잎과 줄기의 아미노산 조성은 각각 다르게 나타났지만 잎과 줄기의 주된 아미노산은 aspartic acid, glutamic acid, isoleucine 및 lysine으로 나타났다. 잎과 줄기의 주요 지방산은 linoleic acid와 palmitic acid 였다. To study the potential of the Humulus japonicus leaves and stalks as materials for functional food, chemical components of the male and female plants were analyzed. Among general components of leaves and stalks, contents of nitrogen free extract and crude protein were higher in leaves than in stalks, whole contents of moisture and crude fiber were higher in stalks than in leaves. The major minerals contained were K, Ca, P and Mg. Among free sugars, frutose(0.16% and 0.10%) and sucrose(0.37% and 0.24%) were the highest in leaves and stalks of male and female plants, respectively. Of non-volatile organic acids assayed acetic acid was the most abundant in both leaves(4.99 mg% and 3.07 mg%) and stalks(3.18 mg% and 2.25 mg%), followed by lactic acid, succinic acid and formic acid. The amino acid compositions of leaves and stalks were different each other and aspartic acid, glutamic acid, isoleucine and lysine were the major amino acids in both leaves and stalks. Major fatty acid in leaves and stalk were linoleic acid and palmitic acid.

FC-25계 회주철의 Boro-Nitriding 복합 표면처리에 따른 표면특성과 고온산화거동에 관한 연구

허인창,손근수,윤재홍,조동율,박봉규,김현수,김인수 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.2

Surface properties and oxidation behavior were studied for FC-25 gray cast iron (GCI), ion nitrided CCI (N CCI), powder boronized CCI (B GCI) and powder boronized N CCI (B-N GCI). A boride (Fe2B and FeB) layer with a tooth shape was formed by boronizing GCI at 650℃. The thickness and hardness of the layer were proportional to boronizing temperature and time. The hardness was decreased as the depth of the boronized layer increased. The activation energy for boride formation was about 74 kJ/mol. The thickness of the graphite layer formed by boronizing was increased by increasing temperature and time. A silicon layer insoluble to borides accumulated beneath the boride layer. The major phases were Fe4N, Fe3N and FeN in the nitride layer formed by ion nitriding. The thickness and hardness of the layer increased with increasing nitriding temperature and time under the Fe4N decomposition temperature of 680℃. The hardness was maximum at the surface and decreased with increasing nitrided depth on B-N GCI at 700℃, above the Fe4N decomposition temperature. Hardness of B-N GCI at the layer depth of 10 μm was 1000 Hv, which was lower than that of the B GCI at the same condition. Also the layer thickness was 50 gm; 10 μm deeper than that of B GCI. The reason was that the nitrogen gas given off by the decomposition made the layer porous and facilitated the diffusion of oxygen and other reactants. The samples were oxidated at 800℃ for 48hrs under atmospheric air. Oxidation rate was in decreasing order of N GCI, GCI, B GCI and B-N GCI. Oxidation rates were greatly influenced by the diffusion of nitrogen gas formed by Fe4N decomposition over the decomposition temperature of 680℃ and the oxidation barrier of the less corrosive boride layer. (Received October 29, 2004)

FC-25계 회주철의 이온질화처리에 따른 표면특성과 고온산화거동에 관한 연구

허인창,손근수,윤재홍,조동율,박봉규,김현수,김인수 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.4

Surface properties and high temperature oxidation behavior were investigated for FC-25 Gray Cast Iron(GCI) and the ion nitrided GCI(N-GCI). The GCI was pre-cleaned to improve hardness to the optimum pre-sputtering parameters with an Ar/H₂ ratio of 1/2, working pressure of 3 torr, working temperature of 550℃ and working time of 1hour. The optimum nitriding conditions for the maximum hardness of 560575 Hv were an N₂/H₂ ratio of 3/1, working pressure of 3 torr, and working temperature of 575℃. The thickness of graphite in the GCI was increased by increasing the working temperature from 525℃ to 595℃ for the nitriding time of 6-18hrs. XRD patterns showed FeO and Fe₂O₃ peaks for both the oxidized N-GCI and GCI at temperatures of 600℃ and 800℃ under atmospheric environment for both 24 and 60hours. At 800℃, above the Fe4N decomposition temperature of 680℃, the oxidation rate of N-GCI was greater than that of the GCI. The most abundant nitride, Fe4N, was decomposed and the nitrogen gas given off by the decomposition made the protective film porous by degassing through the film. But at 600℃, below the decomposition temperature, the degree of oxidation of N-GCI was lower than that of the GCI because the nitride film worked as protective barrier for oxidation. (Received October 29, 2004)

성인에서 발생한 급성 부비동염에 의한 안와봉와직염 1례

김재영,허창호,허형빈 건국대학교 의과학연구소 1996 건국의과학학술지 Vol.5 No.-

Complications of paranasal sinusitis has been progressively decreasing since the advent of antibiotics. The periorbital cellulitis most commonly arises from the spread of contiguous infections of the lids, teeth, or paranasal sinuses. The most frequently isolated pathogens in the orbital infection are staphylococcus and streptococcus pyogen. The periorbital cellulitis occurs most frequently in the childhood. We report one case of periorbital cellulitis induced by acute ethmoiditis. A 37-year-old male patient visited the otolaryngologic out patient clinic with symptom of severe headache around left orbital area for 2 days. The physical examination revealed no gross abnormality except mucopurulent discharge from the left middle meatus. A plain paranasal sinus films showed hazziness in the left ethmoid sinus and frontal sinus. The patient was admitted due to severe headache. On the evening of admission day the patient's left eyeball was protruded and periorbital edema occured. Although the administration of parenteral antibiotics the edema and protrusion of left eyeball became worse, and orbital sonogram revealed cellulitis. An emergency intranasal ethmoidectomy under the endoscopic control was performed on the third admission day. On the second postoperative day the patient's eyelid swelling decreased. On the sixth postoperative day the patient was discharged without orbital sequelae. We report this case with review of the literature.

Ti첨가 및 균질화 처리가 원심주조한 Cu-Zn-Al계 고력황동의 기계적 성질에 미치는 영향

권영한,허성강,김창규,윤재홍 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-

Effects of Ti addition and homogenizing treatment on the mechanical properties in Cu-Zn-Al system high strength brass were investigated. Grain refinement was successfully achieved by Ti addition: The microstructure, which was composed of island or fine feather-like branched Ti compounds was changed to feather-like eutectic microstructure as the content of Ti increased. The highest hardness values was obtained for 0.5wt% Ti specimen and the second was Ti non-added specimen in as-cast conditions. Maximum tensile strength was obtained for 0.5wt% Ti specimen. Dueing to the presence of cast defects and worse castability, tensile strength decreased as the content of Ti increased. Elongation was increased with increasing homogenizing time and temperature: remarkable increase was obtained for 400℃ homogenizing temperature in the 0.5wt% Ti specimen. For 500℃ and 600℃ homogenizing temperature, high elongation was obtained in 2 and 4wt% Ti specimen.

피치각 조정형 송풍-역풍 겸용 축류팬에서 배연용 피치각 선정을 위한 실험적 연구

장택순,허진혁,문승재,이재헌,Chang, Taek-Soon,Hur, Jin-Huek,Moon, Seung-Jae,Lee, Jae-Heon 한국플랜트학회 2009 플랜트 저널 Vol.5 No.1

In this study, the experimental study has carried out to select pitch angle on the backward flow in an axial fan that has adjustable pitch blades. With the change of pitch angle of axial fan with adjustable blade, air flow rate, pressure and air flow direction can be changed. Because of this merit, adjustable axial fan can be used in the backward flow. For the selection of the backward flow pitch angle, fan performance test method is selected by KS B 6311. Dynamic pressure, static pressure, electric current and voltage are measured in each pitch angles of axial fan that are $36^{\circ}$, $-16^{\circ}$, $-21^{\circ}$, $-26^{\circ}$, $-31^{\circ}$ and $-36^{\circ}$. In the result of test, fan performance curves at several pitch angle has been investigated. Finally, pitch angle of $-26^{\circ}$ has been selected to get largest flow rate at backward flow situation.

피치각 조정형 송풍-역풍 겸용 축류팬에서 배연용 피치각 선정을 위한 실험적 연구

장택순(Taek-Soon Chang),허진혁(Jin-Huek Hur),문승재(Seung-Jae Moon),이재헌(Jae-Heon Lee),유호선(Ho-Sun You),임윤철(Yun-Chul Im) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2

In this study, the experimental study has carried out to select pitch angle on the backward flow in an axial fan that has adjustable pitch blades. With the change of pitch angle of axial fan with adjustable blade, air flow rate, pressure and air flow direction can be changed. Because of this merit, adjustable axial fan can be used in the backward flow. For the selection of the backward flow pitch angle, fan performance test method is selected by KS B 6311. Dynamic pressure, static pressure, electric current and voltage are measured in each pitch angles of axial fan that are 36°, -16°, -21°, -26°, -31° and -36°. In the result of test, fan performance curves at several pitch angle has been investigated. Finally, pitch angle of -26° has been selected to get largest flow rate at backward flow situation.

정상 혈압쥐와 본태성 고혈압쥐 노화 적혈수에서의 Na, K-ATPase에 관한 연구

정성훈,박창길,허강민,석정호,이재흔 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.1

To study the change of Na, K-ATPase of aged erythrocytes in the normotensive and hypertensive rats, the young and aged erythrocytes of Sprague-Dawley rats or spontaneously hypertensive rats were fractionized by density gradient, and ouabain sensitive Rb-uptake and [^3H] ouabain binding sites were measured. 1. In the spontaneously hypertensive rats, blood pressure was significantly increased to 151.5/110.0mmHg(systolic/diastolic). Mean corpuscular volume and membrane protein(mg/10^9 RBC) were decreased and hemoglobin content was increased in the aged erythrocytes. 2. In the normotensive rats, ouabain sensitive Rb-uptake of young erythrocyte was increased as increase of Rb concentration from 4 mM to 8 or 16 mM in the reaction medium, but that of aged erythrocyte was lower than that of young erythrocyte. 3. In the spontaneously hypertensive rats, ouabain sensitive Rb-uptake of young erythrocyte was also increased as increase of Rb concentration in the medium, but lower than that of young erythrocyte of normotensive rats, and that of aged erythrocyte was also decreased compared to that of young erythrocyte and that of aged erythrougte of normotensive ratc. 4. [^3H] ouabain binding sites of aged erythrocyte of normotensive rats and young or aged erythrocyte of spontaneously hypertensive rats were lower than that of young erythrocyte of normotensive rats. From the above results, it is suggested that the decreased activity of Na, K-ATPase in the aged erythrocyte of normotensive and spontaneously hypertensive rats may due to the decreased numbers of enzymes, and these enzymes in the erythrocytes of spontaneously hypertensive rats would changed from the younger erythrocytes than those of normotensive rats or one-kidney Goldblatt hypertensive rats.

철원 비무장지대 인근지역에서 두루미류의 월동생태 및 서식지 관리

이우신,임신재,허위행,최창용,최서윤,박용수,이창배 中央大學校 食糧資源硏究所 2003 食糧資源硏究所 論文集 Vol.15 No.1

This study was conducted to investigate wintering ecology and habitat using pattern of cranes for sound protection and management of the birds and their habitat near the Demilitarized Zone(DMZ) of Cheolwon, South Korea. Distribution of cranes seemed to be affected by road construction and human activity. Dried rice paddy was mainly habitat type of cranes in Cheolwon area. Gleaning was dominant behavior during day time. Ratio of alert was increased in afternoon. There was difference in time budget of behavior between red-crowned and white-naped cranes. For the stable wintering of cranes, minimum change of habitat, decrease of human disturbance and stable food maintenance would be needed in Cheolwon area.

삼풍백화점 붕괴 대참사의 법의치과학적 개인식별 : Using the Forensic Odontological Studies

김종열,이영석,윤창륙,허웅,최종훈,김재홍 內務部 國立科學搜査硏究所 1996 國立 科學 搜査 硏究所 年報 Vol.28 No.-