慶北 永川郡 大勝池에서 採集한 淡水魚의 吸蟲類 肝吸蟲 被囊幼蟲 奇生狀의 變動

李鎭植,文柱煥,鄭東一,崔東翊 慶北大學校 醫科大學 1991 慶北醫大誌 Vol.32 No.3

1990年 4月부터 同年 9月까지 慶北 永川郡 大勝池(사근다리못)에서 採集되는 各種 淡水魚에서 肝吸蟲 被囊幼蟲의 寄生狀을 調査하여 1980年 同貯水池에서 調査한 成績과 比較한 바 採集魚種과 寄生狀의 差異를 觀察하였으므로 報告하는 바이다. 1980년 大勝池에서 採集된 魚種은 붕어(Carassius carassius), 강준치(Erythroculter erythropterus), 버들치(Moroco oxycepharus), 납지리(Paracheilognathus rhombea), 참붕어(Pseudorasbora parva), 참중고기(Sarcocheilichthys sinensis)의 6種이었으나 1990年에는 붕어, 파랑볼우럭(Lepomis macrorchirus), 참붕어의 3種만이 採集되었다. 1980年에 採集한 淡氷魚에서의 肝吸蟲 被囊幼蟲의 寄生率과 寄生程度는 강준치 25.0%, 5.4개, 납지리 13.0%, 0.5개, 참붕어 71.1%, 24.4개, 참중고기 46.7%, 5.8개였고, 1990年에는 참붕어에서만 25.0%, 7.7개로 檢出되었다. 以上의 成績으로 미루어 보아 大勝池는 지난 10年間 生態界가 變化하였고 그간에 移植된 파랑볼우럭이 生態界變化에 多少의 影響을 미친 것으로 생각된다. From April to September, 1990, fresh-water fish were collected in Daesong pond and examined for the presence of Clonorchis sinensis metacercaria in order to compare the infestation with C. sinensis metacercaria with that in 1980. Six species of fresh-water fish, Carassius carassius, the crusian carp, Erythroculter erythropterus, the white fish, Moroco oxycepharus, the fat minnow, Paracheilognathus rhombea, the flat bitterling, Pseudorasbora parva, the southern top-mouthed minnow, and Sarcocheilichthys sinensis, the oily shiner, had been collected in the pond in 1980. In 1990, however, only 3 species of fresh-water fish, C. carassius, P. parva and Lepomis macrorchirus, the blue gill, were collected. The rates and intensity of infestation with C. sinensis had been 71.1% and 24.4 cysts per gram of flesh in P. parva, followed by 46.7% and 5.8 in S. sinensis, 25.0% and 5.4 in E. erythropterus, 13.0% and 0.5 in P. rhombea in 1980. The metacercaria were demonstrated from P. parva alone, with the rate 27.3% and the intensity 7.7, in 1990. In the light of these results, it is likely that L. macrorchirus caused the ecosystem of the pond to be changed.

Nicotinaldehyde-4-phenyl-3-thiosemicarbazone을 이용한 Hg(II)의 추출 흡광광도 정량

이진식,카츠야 우에스기,최원형,김재수,김도훈,Lee, Jin-Sik,Uesugi, Katsuya,Choi, Won-Hyung,Kim, Jae-Soo,Kim, Do-Hoon 한국분석과학회 1994 분석과학 Vol.7 No.4

새로운 합성 시약 nocotinaldehyde-4-phenyl-3-thiosemicarbazone(NPS)을 이용하여 Hg(II)의 추출 흡광광도 정량법을 검토하여 미량 Hg(II)의 최적 정량조건을 확립하였다. Hg(II)-NPS 착물은 pH가 3.0~10까지 넓은 범위에서 선택성을 가진 안정된 착물을 형성하며, chloroform을 추출용매로 사용하여 365nm에서 측정한 몰흡광계수는 $2.45{\times}10^4L\;mol^{-1}\;cm^{-1}$이며, Hg(II)의 농도가 $0.2{\sim}18{\mu}g\;mL^{-1}$까지 Beer의 법칙을 만족하였다. 또한 본 분석법을 이용하여 두발(표준시료) 중의 수은을 분석하여 양호한 결과를 얻었다. A selective extraction-spectrophotometric method for the determination of mercury(II) with nocotinaldehyde-4-phenyl-3-thiosemicarbazone(NPS) was described. The method is based on the formation of an insoluble mercury-NPS complex, which is extratable into chloroform from an aqueous solution at pH 3.5 by shaking for 3 min. The absorbance is measured at 365nm and the molar absorptivity is $2.45{\times}10^4L\;mol^{-1}\;cm^{-1}$. The complex system conforms to Beer's law for up to $18{\mu}g\;mL^{-1}$ of mercury(II). The proposed method is simple and selective and has been satisfactorily applied to the determination of mercury in standard human hair sample.

Hydrous Titanium Dioxide로부터 H⁺/Na⁺의 이온교환에 의한 티탄산나트륨의 합성 및 성전이

이진식,송연호,이철태,Lee, Jin-Sik,Song, Yon-Ho,Lee, Chul-Tae 한국공업화학회 1998 공업화학 Vol.9 No.4

Fibrous $Na_xTi_nO_{2n+1}$ whisker was prepared by $H^+/Na^+$ ion-exchange on layered hydrous titanium dioxide ($H_2Ti_4O_9{\cdot}nH_2O$). The ion-exchange reaction was proceeded at 0.5~2.0 M NaOH solution. In the ion-exchange at 2.0 M NaOH solution, 73% of sodium was exchanged and the prepared $Na_xTi_nO_{2n+1}$ whisker was a fibrous crystal of about $10{\sim}20{\mu}m$ of length and about $0.7{\mu}m$ of diameter. The phase transition of the ion-exchange phases identified by the thermal analysis. The result showed that the $Na_xTi_nO_{2n+1}$ whisker was decomposed into $Na_2Ti_6O_{13}$ and $TiO_2$ in the temperature of $200{\sim}600^{\circ}C$. 섬유상의 $Na_xTi_nO_{2n+1}$는 층상구조의 $H_2Ti_4O_9{\cdot}nH_2O$에대한 $H^+/Na^+$의 이온교환에 의해서 합성되었다. 이온교환 반응은 0.5~2.0 M NaOH 용액에서 이루어졌으며, 2.0 M NaOH의 용액에서 이온 교환할 때 73%가 치환되었다. 이 때 길이가 $10{\sim}20{\mu}m$이고 직경이 약 $0.7{\mu}m$인 비교적 균일한 형태의 섬유상을 얻을 수 있었다. 그리고 층상구조의 티탄산나트륨에 대한 상전이는 열분석을 통해 확인하였으며, 이 결과 $Na_xTi_nO_{2n+1}$ 섬유는 $200{\sim}600^{\circ}C$의 온도에서 $Na_2Ti_6O_{13}$과 $TiO_2$로 분해되었다.

자동차 스틸 휠의 접촉부 변형 해석 및 고찰

이진식 한국기계기술학회 2002 한국기계기술학회 학술대회논문집 Vol.2002 No.-

[기술기준연구회 워크숍] 저압범위 개정 공포 및 한국전기설비규정(KEC) 제정 공고

이진식 대한전기학회 2018 대한전기학회 학술대회 논문집 Vol.2018 No.-

선진사 제품 비교평가를 통한 구동 모터 제어용 인버터의 구조적 특성 고찰

이진식,이상훈,박상욱,김규로 한국신뢰성학회 2018 한국신뢰성학회 학술대회논문집 Vol.2018 No.10

졸-겔법에 의한 Li_4/3Mn_5/3O₄의 합성 및 전기화학적 특성

이진식,이철태,Lee, Jin-Sik,Lee, Chul-Tae 한국공업화학회 1999 공업화학 Vol.10 No.1

출발 물질로 lithium acetate와 manganese acetate를 이용하여 졸겔법으로 결함 스피넬 구조인 $Li_{4/3}Mn_{5/3}O_4$를 합성하였으며, 리튬이차전지용 전극물질로 이용하기 위한 전극 특성을 조사하였다. $AA/Mn(OAc)_2$의 몰비를 0.2, $H_2O/Mn(OAc)_2$에 대한 $NH_4OH/Mn(OAc)_2$의 혼합 몰비를 0.4로 혼합하여 xerogel을 합성하고 이를 산소 분위기하에서 $150^{\circ}C$에서 12시간 동안 1차 열처리한 다음 $350^{\circ}C$에서 12시간 동안 2차 열처리하여 합성하였다. 2.0~3.2V의 전위 영역에서 충 방전 실험한 결과 $Li/Li_{4/3}Mn_{5/3}O_4$ cell은 84.23 mAh/g의 방전용량을 나타내었으며, 좋은 cycleability을 나타내었다. $Li_{4/3}Mn_{5/3}O_4$ having a defect structure was prepared by sol-gel process using lithium acetate and manganese acetate as starting materials, and their electrode characteristics in the lithium secondary battery was investigated. The reaction mole ratio was determined as $AA/Mn(OAc)_2$ of 0.2 and $NH_4OH/Mn(OAc)_2$ to $H_2O/Mn(OAc)_2$ of 0.4. The product was obtained through heat treatment at $350^{\circ}C$ for 12hrs after 1'st heat treatment at $150^{\circ}C$ of xerogel under oxygen atmosphere. When the charge and discharge cycles were performed between 2.0 V and 3.2 V, $Li/Li_{4/3}Mn_{5/3}O_4$ cell showed the dicharge capacity of 84.23 mAh/g and the good cycleability was obtained in the plateau region.

亂流衝突流動形成에 關한 實驗的 硏究

韓泰鍾,李鎭植 전주대학교 1986 論文集 Vol.15 No.-

Turbulent jet flow has been studied in many ways; plane jet, wall jet, rectangular jet, annular jet, round jet, parallel jet, valve jet, cross jet, slit jet, and etc. In this report, comparisons of two cross jet flows were tried with two same dimensional nozzles(dia. ø20). Two nozzles were set up to effectuate 45° and 90° jet flows. Each jet of two cross jets flows to the direction of 22.5° to the axis of downstream of the mixed turbulent flow in cross angle 45°, and to the direction of 45° in cross angle 90°. Also the centerlines of two jets meet at the distance of 217mm and 90mm in cross angles 45°, 90°, but the mixing flows of two jets could be imagined to exist beyond those distances. For the experimental investigations were effectuated at X=230mm, X=100mm in cross angle 45, 90°. The I-type, X-type tungsten hot-wires(dia. 5μm, long 3mm) (model 0252 T5) were used for the measurement of the mean velocities and turbulent components, and the pressures were measured by an electric micro manometer with the precision of 1μm of water column. The probe was moved to "Y" direction by an automatic probe traversing system(model SD-100C) with the precision of 1/100mm. The experimental results of this study could be summarized as follows; (1) The mean velocity In crossed angle 45°, 90°, the mean velocities and the widths of jet are shown in larger difference, but the behind mixing region, the characters of two jets shown all similarly a single nozzle jet. In order to consider similarity of crossed jet, the mean velocities of this experiments agree with the formula of Gortler and H. Schlichting in ?? ≒0.4. (2) Fluctution velocity Fluctution velocity in crossed angle 90° appear also higher than in angle 45°. The values appear largely in difference of the inside or the outside at the central region, and the fluctuations of width are different about 40% before and behind mixing region. But in crossed angle 90° these appear higher 30% than in angle 45°. (3) Intensity of tubulence The intensities of turbulence were almost not showed the difference in values of the inside and the outside before and behind mixing region. The changes of width become much larger 100% in crossed angle 45° than in angle 90°. But when the distance go away to X-direction. those show higher 15% in angle 90° than in crossed angle 45°. (4) Momentum Momentums decreased all gradually to X-direction. But the decrease is slow in crossed angle 45° and suddenly in angle 90°, after full mixing region those coincide well in angle 45°, 90°. (5) Reynolds shear stress Reynolds shear stresses ( ?? ) show distribution profiles of uniform aspect in crossed angle 45° comparatively. In crossed angle 90° those ( ?? ) show enough difference in negative (-) values to X-direction. Reynolds shear stresses (U'W') increase according to an increase of Reynolds Number in angle 45°, but decrease in angle 90°, and those show all positive (+) values. After all, the obvious differences of Reynolds shear stress could be known to a consequence of mixing flow by dint of impinging angle in crossed angle 45°, 90°.

精製 中白糖 包裝栽 改善에 대한 生産性 向上에 관한 硏究 : 自然保全과 TPM活動으로

이진식 全州大學校 1992 論文集 Vol.21 No.-

We most supply the requirement of the consuming public at the proper time, improving the present facilities and increasing total efficiency of the facility. A automatic packing machine of 1kg was made in Germany 1978. So there were many breakdowns. But preventive maintenance has not got accomplished, because it is difficult to buy spare stores. Those were found by the machine with troubles in the bureaus of production and equipment control. And so, We studied experimentally so as to increase the operation efficiency, to restore to the original state through the scientific PM(productive maintenance) diagnosis, on the existing machine. As the result, We obtained about a hundred million a year by an effect of the materiality. The 2nd results are following ; there were the accumulation of technology, the increase of the operation efficiency and the sufficiency of a product, because of the technical know-how itself and the decrease of the breakdowns, epochally. Moreover we obtained the next ; the elevation of quality with appearance and precision, the inspiration of improvement consciousness if factory with model of improved machine and the emergence from foreign dependence by alternation to home-made articles of foreign parts. In conclusion, I can suggest the method of problem solution by effective utilization of PM diagnosis.

국산화 개발 HALT장비의 신뢰성 비교 평가에 관한 연구

이진식 한국신뢰성학회 2015 한국신뢰성학회 학술대회논문집 Vol.2015 No.5