2,4-D 處理가 'Harcot' 살구와 '美白' 복숭아의 果實 成熟과 品質에 미치는 影響

윤철구,김영호,임상철,김학현,이철희,최관순,김선규 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-

Effect of 2,4- D application on the fruit maturity and quality of 'Harcot' apricot and 'Mibaek' peach was examined. Leaf area of 'Harcot' apricot was not affected by 2,4-D while that of 'Mibaek' peach was increased by 35mg · L-1 2,4-D. Application of 2,4-D at 35mgㆍL-1 increased the fruit weight of both species, and that of 'Harcot' was doubled. Soluble solids content of 'Harcot' was decreased by 2,4-D while that of 'Mibaek' was not affected. Fruit maturity of 'Harcot' and 'Mibaek' was enhanced for respective 4 and 1 day by 2,4-D application. Percent fruit cracking of 'Harcot' apricot was decreased by 35mg · L-1 2,4-D.

지베렐린과 에세폰의 葉面撒布가 '美白' 복숭아의 熟期와 品質에 미치는 影響

김영호,윤철구,임상철,김학현,이철희,최관순,김선규 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-

In order to obtain the basic data for artificial maturity control of 'Mibaek' peach, GA and ethephon were foliar sprayed 4 weeks prior to harvest, and their effects on fruit maturity and quality were examined. GA and ethephon tended to decrease the fruit weight except 100mg ㆍ L-1 GA+50 to 100mg · L-1 ethephon treatment. GA increased the fruit firmness, and ethephon at higher concentration increased the fruit drop. Harvest date was advanced for 7 to 8 days by ethephon while was delayed for 6 to 8 days by GA treatment, regardless of concentration.

단무지 공장에서 발생한 질식 사고의 원인과 방사선학적 소견: 중례보고 및 가스분석 결과

박충기,김만구,김흥철,안범규,박만수,황우철,최철순,강익원 江原大學校 附設 環境硏究所 1994 環境硏究 Vol.11 No.-

목 적:단무지 공장에서 질식사고를 일으켰던 가스의 종류를 알아내고, 이러한 가스중독의 방서선학적 소견을 소개하기 위하여 본 연구를 하였다. 대상 및 방법:단무지 공장에서 발생한 질식 사고자 3예중 생존자 1예를 대상으로 단순흥부X-선검사와 CT 소견을 분석하였으며, 가스의 종류를 알아내기 위하여 단무지를 유리병에 넣어 발생된 가스를 가스크로마토그래픽을 이용하여 분석하였다. 결 과:단무지 공장에서 발생한 질식사고자중 생존한 1명의 방사선학적 검사에서 신속히 호전되는 폐경결(consolidation)을 볼 수 있었으며 이는 폐부종의 소견임을 알 수 있었다. 협기성 상태에서 단무지를 담은 유리병의 상층부 가스를 실험 분석한 결과 이산화탄소, 에칠알코올이 다량으로 검출되었으나 독성가스는 주로 황화수소이였다. 결 론:단무지 공장의 질식 사고자에서 폐방사선학적 소견은 폐경결을 보이는 폐부증으로서 이는 실험을 통해 단무지에서 발생되는 유독가스인 황화수소 때문임을 입증하였다. Purpose: To identify the main toxic gas released from salted radish in rice bran(Dan-M-Ji) and to introduce the radiological findings of the patient who was exposed to the gas. Materials and Methods: Chest radiographs and CT scans of one survivor among three men who were exposed to the gas from Dan-Mu-Ji were reviewed. Gas obtained from the closed bottle containing Dan-Mu-Ji was analized by using the gas chromatography. Results: The radiographlc examinations of the survivor were suggestive of pulmonary edema with it's rapidly improving consolidations in both lung. The headapace gas within the bottle containing Dan-Mu-Ji was mainly composed with carbon dioxide, ethyl alcohol and hydrogen sulfide, of which hydrogen sulfide was considered the main toxic gas released. Conclusion: Under the anaerobic condition, Dan-Mu-Ji released toxic hydrogen sulfide. Inhalation of hydrogen sulfide might produce non-cardiogenic pulmonary edema.

불소이온에 따른 치과용 티타늄의 물성변화에 관한 연구 : 1. 티타늄 합금의 변색 및 표면 변화 1. TARNISH AND SURFACE CHANGE OF TITANIUM ALLOYS

김철위,임범순,문현정 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.3

The prophylactic application, at regular time intervals, of gels and solutions containing high concentrations of fluorides had indeed become more frequent, reaching a noticeable impact on the dental caries prevention. In the particular case of dental titanium alloys, however, use of prophylactic products with a high concentration of fluorides could cause tarnish and corrosion of titanium alloys. The aim of this study was to investigate the effect of fluoride concentration and pH value on the tarnish and surface change of titanium alloys, and provide a profitable information whether titanium alloys was affected or not in the concerned environment. Six titanium and titanium alloys and one cobalt-chromiun alloy were investigated by the spectrophotometer and the stereo zoom microscope. Various concentration of fluoride gel and NaF solutions with four different pH values were used as electrolytes for test. From the experiments, the following results were obtained. As the titanium oxide passivated layers were severely damaged by fluoride solution, the degree of discoloration did not show a monotonical increase as function of fluoride concentration and period of treatments. TZN and TZSN showed a significantly high discoloration in the high concentration of fluoride solution. Specimens showed a high discoloration in solution with pH 4 for 1000 ppm NaF solution, and pH 3 for 100 ppm NaF solution. On the contrary, pH values of NaF solution did not affect the discoloration of titanium specimens for fluoride concentration below 10 ppm. NITI showed a less surface damage by fluoride solution than the other titanium alloys. Fluoride solution did not affect the color stability and surface properties of cobalt-chromium alloy (VTL).

광중합형 글라스 아이오노머 시멘트의 개발에 관한 연구

김철위,윤수한,임범순 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.1

The object of this study was to synthesize the experimental light-activated glass ionomer cement change of glass components such as aluminum, fluorine, calcium, and strontium. To reinforce the glass ionomer cement, additions of metallic powder, ceramic powder, and light-activated composite resin to glass ionomer cements were performed. Radiopacity, comprehensive strength, bond strength, fracture toughness, sloubility, and cytotoxicity of the various experimental glass ionomer cements were investigated. From the experiment, the following results were obtained: 1. Experimental light-activated glass ionomer cement showed similar physical and mechanical properties to commercial glass ionomer cement. Radiopacity, resistance of solubility, fracture thoughness, and compressive strength of the experimental cement were superior to those of commercial cements, but bond strength and biocompatibility of the experimental cement were inferior to commercial cements. 2. Addition of amalgam powder to light-activated glass ionomer cement resulted in the lower compressive strength and fracture toughness, but addition of aluminium powder resulted in the enhanced the fracture toughness. 3. Addition of alumina powder (Al₂O₃) could enhance the compressive strength and fracture toughness of the glass ionomer cement without sacrificing of the esthetic property. 4. Physical mixing light-activated glass ionomer cement with light-activated composite resin could enhanced the physical properties except for bond strength.

인공타액에서 염소이온과 황이온 농도가 치과용 귀금속계 합금의 변색 및 부식저항에 주는 영향 : 1. 시판 치과용 귀금속계 합금 1. DENTAL COMMERCIAL NOBLE METAL BASED ALLOYS

임범순,문현정,김철위 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.2

The object of this study was to study effect of Cl- and S²- ions on tarnish and corrosion resistance of dental noble metal alloys in the artificial saliva. Twenty-four commercial dental noble metal based alloys(five for high-Au based alloys, seven for low-Au based alloys, four for Pd-based alloys, and eight for Ag-Pd based alloys) were investigated by the Potentiostat and the Spectrophotometer. Modified Fusayama's artificial salivas with various concentrations of Cl- ion(1.22, 12.22, 24.44, and 61.10 mM/ℓ) and S²- ions(0.01, 0.10, 0.20, 0.35, 0.50, 1.00, 5.00, 10.0, and 20.0 mM/ℓ) were used as electrolytes for test. From the experiments, the following results were obtained. Concentration of Cl- ion in artificial saliva did not in fluence the potentiodynamic polarization curves for dental noble metal alloys. On the other hand, concentration of S²- ion in artificial saliva strongly influenced the potentiodynamic polarization curves for dental noble metal alloys ; corrosion potentials were decreased up to 500 mV and current densities were increased by 100 times. In color change measurements after potentiodynamic polarization curve test, the values of ΔE for high-Ae and Pd-based alloys were increased as the concentration of S²- increased up to 1.00 mM and then were reached a plateau at higher concentration of S²-. For low-Au and Ag-Pd based alloys, the values of ΔE were drastically decreased as the concentration of S²- increased up to 1.00 mM and then were reached a plateau at higher concentration of S²-. By determining the color of an alloy before and after exposure to a test solution, the color changes were ranged of 4∼6 for high-Au and Pd-based alloys and 20∼35 for low-Au and Ag-Pd based alloys.

큰느타리버섯 인공재배에 있어서 배지조성의 영향

박동철 ; 김순희 ; 강병태 김천대학교 2007 김천대학교 논문집 Vol.28 No.-

This study was performed to investigate on the combinations of optimal medium for the artificial cultivation of Pleurotus eryngii with the various kinds of substrate and nutrient. It was also tested to the mushroom yields and marketable quality of Pleurotus eryngii. Coconut ML. and bean-curd refuses were effective to the mycelial growth, which showed a similar effects compared to a standard medium. a Pine sawdust was more effective than the softened rice hulls and crude rice hulla on the mycelial growth. Elvan as additives was also showed promotive effects on the mycelial growth. In the test of medium weight, optimal weight in about 1400 ml polypropylene (PP) bottle was about 724 gram to 770 gram under 65% humidity. Most suitable periods of incubation were estimated about 40 days. It could be also considered to use TMR(Total mixed Ratio) in the medium combination as nutrients because the TMR addititon of 170 gram weight showed an excellent formation of fruiting body of Pleurotus eryngii. Finally, the optimum composition of nutrients for both yield and quality turned out to be combination of gluten feed( 21.7%), rice polishing (10.2%), wheat bran(52%), soy-hull uncrushed (13.5%) and shell lime (3.6%). Nutritional analysis of the combined nutrients was appeared to have 11.5% humidity, 15.4% crude protein, 4.5% crude fat, 12% crude fiber, 8.2% cash, 1.2% calcium, 0.94% phosphorus, and 55.4% NFE (nitrogen free extract). In the bulk test of artificial cultivation by mushroom farmer, both yield and quality were very excellent to the previous products by harvesting about 200 gram in a PP bottle without a significant deviation.

구급일지를 통한 병원 전 환잔 분류 및 처치의 적절성 평가 연구

민순식,김재광,이근,박철완,양혁준,류일,현성열,이훈규,정환모,김윤 대한응급의학회 2000 대한응급의학회지 Vol.11 No.4

Background: Recently, patients' demands for emergency medicine are increasing, and most of prehospital medical care, including basic life support, cardiopulmonary resuscitation and triage, are provided by paramedics or emergency medical technicians. Evaluation of the adequacy of prehospital management and triage has become important for improving the quality and the effectiveness of the emergency medical system. Methods: The 202 patients who were transferred by ambulance with paramedics, nurses, or emergency medical technicians to the Emergency Department in Gil Medical Center from July 1, 1999, to September 31, 1999, were enrolled. This study was conducted prospectively by using the emergency physician,s log and newly devised protocols recorded by paramedics or nurses. Results: 1) Male to female ratio was 1: 0.8, and the peak age of the patients were the 4th(18.8%) and 6th decade(15.3%). 2) Of the 202 patients, 84 patients were transferred for trauma and 118 for medical problems. The mean transfer time was 6±1.73 minutes. 3) The validities of prehospital triage and decisions using the trauma severity measure and the disease severity measure, were 33.3% in trauma patients and 57.6% in medical patients.4) The results for the adequacy rate in prehospital management analyzed by using the rate of necessity of treatment. performance of treatment, and adequate treatment were as follows: oxygen supply.38.1/41.6/93.8 ; wound dressing. 19.3/71.8/92.9 ; immobilization of the cervical spine, 15.8/56.3/92.9 ; application of a spinal board. 12.9/42.3/72.7 ; application of a splint, 9.9/50.0/60.0 ; manual maintenance of an airway. 9.9/55.0/63.6 ; and CPR, 4.5/66.7/0. 5) Kind of ALS(Advanced Life Support) were not conducted(peripheral IV, EKG. intubation, medical administration. defibrillation, pacing). The rates of necessity of treatment were as follows: peripheral IV, 40.6%; ECG monitoring, 23.3% ; endotracheal intubation, 8.9% ; medical administration, 8.9% ; defibrillation. 3.5%; and pacing. 1.5% Conclusion: The adequacy of prehospital triage and decisions using trauma and disease severity measures was relatively low. To improve the adequacy of BLS(Basic Life Support) and to increase the performance of ALS(Advanced Life Support), we must create challenges to develop new protocols and to supplement new equipment.

유기용매에서 치과용 콤포짓트 레진의 시효처리에 따른 표면조도 및 색 변화

임범순,김철위,문현정 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.1

The purpose of this study was to evaluate the degree of color stability and examine the surface change of esthetic restorative materials in various organic solutions. Ten esthetic restorative materials were used : three chemical-cured composite resins(HPC, PAS, and PAL), four light-cured composite resins(CHA, Z100, AEL, and FLO), three light-cured polyacid modified composite resins(HYT, DYR, and COM). Specimens were prepared as disks of 14mm in diameter and 1.2mm in thickness. After polymerization, specimens were immersed in six different solutions(distilled water, artificial saliva with mucin, 0.1 mole acetic acid solution, 10% hydrogen peroxide solution, and 50% and 75% ethanol) for 1,7,14,21,28,56,84,112, and 140 days. The specimens were maintained at 37℃ throughout the study. Color was measured by CIE L*a*b* against to CIE standard illuminant C reflected on spectrophotometer(CM-3500d, Minolta, Japan.) with specular component exclusive(SCE). After various treatments, the surface of specimens was examined by Surface Roughness Tester(Surtronic 3P, Rank Taylor Hobson Ltd., England.). From the experiment, the following results were obtained. In distilled water, specimens showed an acceptable color stability except for CFS. The water hardening glass ionomer cement, CFS, showed the highest color change(△E>5.0). Color stability of specimens in artificial saliva with mucin was similar to that in distilled water. CFS and KTM showed high color change(△E>5.0) and it would not be acceptable in the clinical situation. In acetic acid solution, all of the glass ionomer cements and compomer specimens showed high color change due to the dissociation of metal-polyacrylate by chemical reaction with H+ ions. CFS, FLC, and FLT showed high color change in ethanol. Color change of specimens in 50% ethanol was higher than that in 75% ethanol. 10% hydrogen peroxide solution resulted in high color change for chemical-cure glass ionomer cements and destroyed the specimens. FLC and CPG showed high color change due to oxidation of residual reaction accelerator and inhibitor by hydrogen peroxide.

은, 동 및 팔라듐이 치과용 저금계 합금 및 은-팔라듐계 합금의 표면경도, 황이온에 의한 변색 및 부식저항성에 주는 영향 : Ⅱ.Experimental Low Gold Based Alloys Ⅱ. 실험용 치과용 저금계 합금

임범순,문현정,김철위 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.2

Nine experimental low gold based alloys (Au = 20 %) were prepared with various concentrations of Pd, Ag, and Cu. Experimental alloys were divided into three groups : casted alloys, quenched alloys subsequent to solution treatment, and aged alloys subsequent to solution treatment. Microstructure of alloys was examined by Optical microscope and SEM with EDXA, and surface hardness of alloys was measured by Vickers' hardness tester. Color changes and anodic polarization curves of alloys in the modified Fusayama's artificial saliva with various S² concentrations (0.01, 0.10, 0.50, 1.00, and 5.00 mM/ℓ) were evaluated by Spectrophotometer and Potentiostat. With an increase of Pd concentration in experimental alloys, color change (ΔE) of alloys was significantly decreased and surface hardness was moderately increased, but it had surprisingly little effect on the anodic polarization curves (p>0.05). Color change (ΔE) and surface hardness were increased with a decrease of Ag/Cu ratio in experimental alloys, but anodic polarization curves did not change significantly (p>0.05). Color changes of the quenched alloys was lower than those of the aged alloys. Corrosion potential of alloys was not affected by heat treatments, but current densities were affected at high potential (>400 mVSCE). Significantly higher current density of the aged alloys, compared to the quenched alloys, could result in server corrosion. The surface hardness of the casted alloys was apparently greater than that of quenched alloys. In SEM and EDXA analysis, it was observed that Pd was precipitated in the Cu-rich phase and Au migrated to the Ag-rich phase.