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Lycopersicum esculentum 'cherry tomato'의 葯培養에 관한 硏究
鄭海駿,李永馥 培材大學校 1984 論文集 Vol.5 No.-
Anthers at the stage of uninucleate microspore of Lycopersicum esculentum 'cherry tomato' were cultured on the Murashige and Skoog's medium suppllemented with NAA and BA. Most of the binucleate microspores were equationally divided whereas the unequational division was relatively rare. The two nuclei formed were again divided into multinuclei, which were further developed into calli. After one month of culture, calli there formed on the MS medium containing BA 2mg/l and NAA 0.25mg/l. Shoot of embryoid-like body was not formed from the calli after subculture on the medium with reduced amounts of auxins.
HAI JOON LEE,ILL WON KIM,CHANG DO KIM,GWIY SANG CHUNG,JAE SHIN LEE,SUN HEE KANG 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
We have fabricated 99.0SnO2+0.5CoO+0.5ZnO (SCZ) varistor ceramics by using a solid-state reaction method and studied the influence of sintering temperature on the nonlinear electrical properties by measuring the impedance, the grain and the grain boundary resistance, the breakdown field, and the nonlinear coefficient as functions of the temperature, the electric field, and the frequency. The conduction behaviors of O0 ions (0.6 eV) was found to be dominated by reduction of Co00 Sn and Zn00 Sn defects (0.4 eV) with increasing sintering temperature. The breakdown field (EB, 800 900 V/cm) and the nonlinear coefficient (, 9.3) of the SCZ ceramics were stabilized above a sintering temperature of 1350 C.
Nonlinear I-V Characteristics of Ta2O5-, Nb2O5-, V2O5-Doped SnO2 Based Varistor Ceramics
HAI JOON LEE,김일원,CHANG DO KIM,정귀상,이재신,SUN HEE KANG 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.2I
The influence of doping on the nonlinear electric properties of Nb$_{2}$O$_{5}$, Ta$_{2}$O$_{5}$, V$_{2}$O$_{5}$ doped SnO$_{2}$+CoO+ZnO varistor ceramics has been studied by measuring the nonlinear coefficient, the breakdown field, the barrier height and ac conductivity as functions of the temperature, the electric field and the frequency. The un-doped SCZ ceramics showed varistor characteristics, such as a nonlinear coefficient ($\alpha$ = 2.94) and breakdown electric field ($E$$_{B}$ = 1760 V/cm) at the room temperature. The Ta$_{2}$O$_{5}$ and V$_{2}$O$_{5}$ doped SCZ:Ta and SCZ:V ceramics displayed no varistor characteristics at the room temperature. However, the Nb$_{2}$O$_{5}$ doped SCZ:Nb ceramics exhibited enhanced varistor characteristics ($\alpha$ = 17.2, $E$$_{B}$ = 5064 V/cm) at the room temperature. The advanced varistor characteristics of SCZ:Nb ceramics can be explained by the formation of oxygen species, such as O$^{\prime}$, O$^{\prime\prime}$.
Hai Joon Lee,Ill Won Kim,Byung Moon Jin 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.1
Ferroelectric Na0.5K0.5NbO3 thin films (300 nm in thickness) on Pt(111)/Ti/SiO2/Si substrates were fabricated by using RF-magnetron sputtering method at different substrate temperatures. The effect of growth temperatures on the ferroelectric properties of the NKN films was investigated. It was confirmed that the NKN thin film grown at 600 ℃showed the orthorhombic perovskite structure and exhibited a well-defined P-E hysteresis loop with a high remnant polarization (Pr ~23.8 µC/cm2) and had a fatigue-free behavior up to the 1 × 1010 polarization switching cycles.
( Hai Feng Jin ),( Seung Yun Lee ),( Si Nae Lee ),( Joon Ho Song ),( Moon Jae Kim ),( Seoung Woo Lee ) 대한전해질학회 2014 Electrolytes & Blood Pressure Vol.12 No.2
This retrospective study was performed to determine the ranges of the sodium gradient (SG) between the dialysate sodium concentration (DNa) and serum sodium concentration (SNa) in hemodialysis (HD) patients and to examine the relationships between HD parameters over a 1 year period. Fifty-five clinically stable HD patients, who had been on HD >2 years were enrolled. Monthly HD [ultrafiltration (UF) amount, systolic blood pressure (SBP), frequency of intradialytic hypotension (IDH)] and laboratory data were collected and 12-month means were subjected to analysis. The SG was calculated by subtracting SNa from prescribed DNa. Mean SG values were 1.5±3.3 (range -5.6~9.1). SG was positively related to DNa and the frequency of IDH. A higher SG was associated with larger UF amounts and SBP reduction during HD. The percentages of patients with a SG ≥3mEq/L increased as DNa increased. On the other hand, SG was not found to be associated with SNa or pre-HD SBP. DNa appears to cause a significant increase in SG, and this seems to be related to HD para- meters, such as, UF amount and IDH.
이상우,김윤환,이재원,김경수,박미라,박동규,이성준,이구,김광희,김창덕,최재현,류호상,전훈재,송치욱,서성옥,엄숭호,현진해,진윤태 대한간학회 1998 Clinical and Molecular Hepatology(대한간학회지) Vol.4 No.4
Background/ Aims : Cases of small hepatocellular carcinoma (HCC) have been increasing with the progress of diagnostic methods . In t his study the screening methods for early diagnos is of HCC were re-evaluated, and comparative ther apeutic analyses were perfomed. Methods : A total of 110 pat ients with small HCC ($lt; 5 cm and $lt; 4 nodules ) were retrospectively analyzed. The patients were divided into four treatment groups ; unt reated group (No T x, n=12), transarterial-oily-chemoembolization group (TOCE, n=43), combined treatment group of percutaneous ethanol injection and TOCE (CEI, n=22), OP group ( OP, n=33). Results : Small HCC occupied 22.6% of t ot al HCC cases . Only one thir d of small HCC cases were detected during the regular screening. In this group, Alpha- fet oprotein as say pr ovided a diagnostic clue in 50% of cases, ultras onography in 71%, and the combination of both in 88%. Five year s ur vival rat e and 5- year non- recurrence rate in small HCC was 29% and 37% respectively. Comparative ther apeutic analys es showed t hat CEI and OP gave a bet t er s ur vival t han T OCE in Child gr ade A. CEI prolonged survival in Child grade B wher eas TOCE did not . Only TOCE was tried and did not improve the survival in Child grade C. Conclus i on : 1) A more strict screening is needed in high risk group of HCC. 2) As a first line of treatment in small HCC, OP or CEI can be selected in Child grade A, and CEI in Child grade B. In Child grade C, a less invasive treatment (PEIT , microwave coagulat ion therapy) should be investigated. (Korean J Hepatol 1998;4:365 380)
이상우,김윤환,이재원,박미라,이성준,이구,김창덕,최재현,엄순호,류호상,전훈재,송치욱,현진해,진윤태,김광희,서성옥 대한소화기학회 1999 대한소화기학회지 Vol.32 No.6
Background/Aims: Recent progress in both diagnostic and therapeutic technique of hepatocellular carcinoma (HCC) appears to improve the prognosis. The purpose of this study was to evaluate the prognosis of HCC in relation to treament methods. Methods: A new staging scheme (PI stage) based on the prognostic index was used. A total of 487 patients with HCC were divided into 4 treatmen groups; no treatment (No Tx), transarterial oily chemoembolization (TOCE), combination of percuta neous ethanol injection and TOCE (CEI), partial hepatectomy (OP). Results: In PI stage I, the groups of CEI and OP showed similar survival rates, and both prolonged survival compared with the group of TOCE. In PI stage II, CEI gave a better survival than TOCE, whereas OP could not improve survival rate, compared with TOCE. In PI stage III, only TOCE was done in some patients and i prolonged survival, particularly when serum bilirubin was 1.5 mg/dL or less. Conclusions: In the P stage I, operation is recommended firstly, but if operation is impossible, CEI could be selected. CE may be chosen as the first treatment choice in PI stage II. In PI stage III, TOCE may be considered for patients whose serum bilirubin is 1.5 mg/dL or less.
성인의 간에 발생한 미분화 육종: 증례 보고 및 국내 문헌고찰
이상우,이성준,이구,이광희,이홍식,김창덕,진윤태,최재현,엄순호,류호상,전훈재,송치욱,현진해 대한간학회 1998 Clinical and Molecular Hepatology(대한간학회지) Vol.4 No.3
Undifferentiated sarcoma is one of the rare primary malignant tumor of the liver typically occur ring in later childhood. It has also been referred to embryonal sarcoma or malignant mesenchymoma. In Korea, three child and two adult cases have been reported to date in literature. We experienced a case of undifferentiated sarcoma in a 65- year- old female who presented with abdominal pain and right upper quadrant mass . Contrast-enhanced abdominal CT scan revealed a well demarcated mass with low attenuation and septation at left lobe of the liver and the mass showed hypovascular pattern on hepatic angiography. On cross section, the tumor was well demarcated from the adjacent liver by a fibrous pseudocapsule and showed cystic degeneration. Pathologically, the tumor was consistent with an undifferentiated sarcoma of the liver . (Korean J Hepatol 1998;4:283 289)