• 한국해양학회지
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• 제22권2호
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• pp.80-86
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• 1987

1982년에서 1983년에 걸쳐 진해만에서 채집, 동정된 해산 지각류는 다음의 5 종이였다 : Evadne nordmanni, Evadne tergestina, Podon leuckarti, Podon polyphemoides, Penilia avirostris. 계절적인 출현양상을 보면 충계에는 E. nordmanni(3-5월), P. leuckarti(4-5월),그리고 하계에서 추계에 걸쳐서는 Evadne tergestina(6-12월), P. avirostris(6-11월)가 탁월하였다. 한편 P. Polyphemoides는 2월을 제외하고 년중 출현하였다. 개체수의 분포는 P. avirostris, P. polyphemoides 그리고 E. tergestina의 순서로 많았고 E. nordmanni나 P. leuckarti는 1,000개체/㎥ 미만이었다. 체장조성의 계절적인 변화를 보면 E. tergestina와 P. avirostris는 수온 의 상승에 따라 체장이 큰 폭으로 증가하는 경향을 보이고 있으나, 특히 P. polyphemoides에서만은 수온 15$^{\circ}C$이하에서 체장의 증가를 보였다.

• Clinical and Experimental Reproductive Medicine
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• 제22권2호
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• pp.155-161
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• 1995

The present investigation has been undertaken to elucidate the differentiation mechanism the uterus which is the environment of the embryo development, by demonstrating the role of ovarian steroids hormone in the decidualization of the pseudopregnant rat uterus. To determine the effect of ovarine steroids and artificial stimulation (trauma) on the differenciation of the uterine endometrium and decidualization for implantation, attempt was made to measure concentrations of serum estradiol($E_2$), progesterone($P_4$) and nuclear $P_4$ receptor in the traumatized and non-traumatized uterine tissue of the pseudopregnant rat. The results obtained are as followings : The concentration of serum $E_2$ on day 9(implantation stage) was similar in both of intact pseudopregnant rat(47.63pg/ml) and normal pregnant rat(40.71pg/ml). And among the treated groups, $E_2$ concentration was highest in the $E_2$ treated group in comparision with intact control group(relative value; 73.27%). The concentration of serum $P_4$ was also highest in the $P_4$ treated group(23.12pg/ml). Relative value of $P_4$ treated group in comparision with intact group(24.88pg/ml) was 92.93%. The nuclear $P_4$ receptor levels in the artificial traumatized groups were higher compared with the non-traumatized control groups. This study, therefore, clearly demonstrates that the methods for inducing pseudopregnant (vagina tapping;120/min) and inducing decidualization(oil injection; 0.1ml/uterine horn) appear to be effective, $P_4$ appears to be effective in the differenciation of the uterine endometrial tissue for the implantation process. Concentration of serum $P_4$ seems to be well correlated with the level of the nuclear $P_4$ receptor during the early embryo development. These results seem to be well correlated with ALPase activities in the normal and pseudopregnant rat uterus shown in the previous study.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2010년도 하계학술대회 논문집
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• pp.376-376
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• 2010

The single crystals of p-$CdIn_2Te_4$ were grown by the Bridgman method without the seed crystal. From photocurrent measurements, it was found that three peaks, A, B, and C, correspond to the intrinsic transition from the valence band states of $\Gamma_7$(A), $\Gamma_6$(B), and $\Gamma_7$(C) to the conduction band state of $\Gamma_6$, respectively. The crystal field splitting and the spin orbit splitting were found to be 0.2360 and 0.1119 eV, respectively, from the photocurrent spectroscopy. The temperature dependence of the $CdIn_2Te_4$ band gap energy was given by the equation of $E_g(T)=E_g(0)-(9.43{\times}10^{-3})T^2/(2676+T)$. $E_g$(0) was estimated to be 1.4750, 1.7110, and 1.8229 eV at the valence band states of A, B, and C, respectively. The band gap energy of p-$CdIn_2Te_4$ at room temperature was determined to be 1.2023 eV.

• 한국가축번식학회지
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• 제24권2호
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• pp.199-208
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• 2000

본 연구에서는 한우의 난소의 변화 주기를 이용한 난포란 채란, 채란시 음압의 정도, 난포란의 채취용 바늘의 직경에 따른 효과, 난포자극호르몬을 이용하여 난소의 난포발달자극의 효과, 생체에서 생산된 미성숙 난포란을 이용하여 체외에서 수정란을 생산한 다음 동결란과 신선란을 이식하여 결과를 도출하였는데, 그 결과는 다음과 같이 요약될 수 있다. 1. 한우의 난소에서 난포기와 황체기로 구분하여 생체로부터 난포란을 채란할 경우 황체기는 4.2$\pm$2.9개를, 난포기에는 4.4$\pm$3.5개를 채란할 수 있었는데 유의적인 차는 인정이 되지 않았다 (P＜0.05). 2. 한우에서 난포란을 채란할 때 적당한 음압의 수준은 40~120mmHg의 범위가 적 당하다는 것을 알 수 있었다. 40, 80, 120mmHg에서의 채란수는 각각 4.2$\pm$3.2, 4.3$\pm$3.4, 4.5$\pm$3.4개였고, 회수율은 각각 49, 47, 45%를 보였는데 유의적인 차는 없었다(P＜0.05). 3. 난포란 채란에 이용되는 채란용 바늘의 직경의 차이에서 난포란의 채란수 (율)에는 17G에서는 4.4$\pm$3.5 (54%)개를, 18G 에서는 3.0$\pm$1.8 (45%)개의 채란수를 얻었는데 유의적인차 (P＜0.05)는 없었고, 채란난자의 채란등급에서도 채란바늘의 직경차이에도 표에 보는 바와 같이 유의적인 차가 없었다 (P＜0.05). 4. 난소에서 보다 많은 난포의 발달을 유도하여 난포란의 채란수 (율)를 증가시키기 위해 난포자극호르몬을 투여한 결과, 근육주사법에서는 증가난포수(율)는 6.2$\pm$2.3 (69.2)개를, 피하주사법에서는 1.1$\pm$2.7 (10.5%)개가 증가하는 효율을 보였는데 주사법에 따른 유의차는 없었고 (P＜0.05), 호르몬주사량에 따른 난포발달수 (율) 은 400mg 을 주사한 그룹에서는 6.3$\pm$2.4 (64.6 %)개를, 200mg 을 주사한 그룹에서는 4.1$\pm$3.2 (50.9%) 개가 증가하는 효율을 보였는데 유의적인 차는 없었다 (P＜0.05). 5. 한우의 체내에서 뽑은 난포란을 이용하여 수정란을 생산한 후 공란우에 대해 이식을 실시한 결과, 동결란을 이식한 경우의 수태율은 11.1% 를, 신선란을 이식한 결과 46.2% 의 수태율을 얻었는데, 동결란보다는 신선란의 수태효율에서 유의적으로 높은 결과를 얻었다(P＜0.05). 본 연구에서는 한우로부터 다수의 난포란을 안정적으로 채란하여 우수한 수정란의 연속적인 생산 및 이식의 가능성을 확인하였다.

• Clinical and Experimental Reproductive Medicine
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• 제21권3호
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• pp.233-240
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• 1994

This study was conducted to compare the endocrine milieu, and pregnancy rates in In Vitro Fertilization and Embryo Transfer(IVF-ET) program employing combined with gonadotropin releasing hormone agonist(GnRH-a) and pergonal(LH 75lU+FSH 75lU) when either human chorionic gonadotropin(HCG) or progesterone were used for luteal phase support. A total number of 40 IVF-ET treatment cycles were prospectively studied. Ovarian hyperstimulation method was modified ultrashort protocol using GnRH-a. All patients started Decapeptyl at menstrual cycle day # 2, and HMG was started at # 3 days. When leading follicle was ${\geqq}$18mm or at least two follicles were ${\geqq}$14mm in diameter, HCG 10000lU intramuscularly was injected. After 36 hours HCG administration, oocytes were retrieved as usual guided by transvaginal ultrasound. Embryo were transfered 36-48 hours later. The patient's cycles were prospectively randomized to receive HCG(20cycles) or Progesterone (20cycles) for luteal support. The progesterone group received 25mg 1M starting from the day of ET. The HCG group received 1500IU 1M. on days 0, +2, +5 after ET. Estadiol($E_2$) and Progesterone($P_4$) were measured on the day of oocyte aspiration, ET day, and every 6 days thereafter. Results were follows as; 1. Estradiol, progesterone and LH levels on the day of HCG trigger, retrieved oocytes and number of transfered embryo were not significantly different in both groups. 2. On the day of aspiration and embryo transfered day, $E_2$, $P_4$ level were significantly higher in progesterone group than HCG group(p<0.01). 3. $E_2$, $P_4$ level on 6 days after ET were significantly higher in progesterone group than HCG group(p<0.01). But, $P_4/E_2$ ratio was not different in both groups. 4. $E_2$, $P_4$ level 12 days after ET were decreased abruptly in both groups and higher hormonal level appeared in HCG group(P<0.01). 5. The total pregnancy rate in the HCG group was 40% (8/20) and in the progesterone group 15%(3/20). 6. Comparing the pregnant and nonpregnant cases progesterone group was not different the hormonal status. In HCG group, pregnant cases appeared in higher $P_4$, $P_4/E_2$ ratio than nonpregnanct cases(P<0.01).

• 한국미생물·생명공학회지
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• 제20권3호
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• pp.280-288
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• 1992

Serratia marcescens ATCC 21074 균주가 세포밖으로 분비하는 metalloprotease 유전자를 대장균으로 클로닝하고 그 발현을 살펴보았다 Serratia marcescens ATCC 21074 균주의 염색체 DNA를 제한효소 HindIII로 절단하고 아가로스 전기영동 후 32P로 표지된 합성 oligonucleotide를 사용하여 southern hybridization한 결과 4.0Kb의 DNA 절편에 metalloprotease가 존재함을 알 수 있었다. 4.0Kb 염색체 DNA 절ㅊ편을 분리하여 pUC19에 연결한 후 대장균으로 transformation하였다.

• 한국동물학회지
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• 제39권3호
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• pp.257-265
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• 1996

참개구리를 사용하여 난소내 여포들이 성장시기에 획즉하게 되는 스테로이드들의 생성능력을 조사하였다. 개구리로부터 중간(0.7-1.11mm) 크기 이하의 여포들을 분리한 다음 전구스테로이들이나 뇌하수체추출물(FPH)을 포함한 배양액에서 6시간 배양 후 이들에 의해 산물스테로이드로 전환된 양을 방사면역 측정법으로 조사하였다. FPH의 처리는 중간 크기의 여포만 스테로이드들의 생성을 현저히 촉진하고 작은 여포들(0.35-0.7mm)에서는 촉진효과가 매우 미약하였다. Progenenolone의 첨가는 가장 작은 여포 (0.22-0.4mm)들에 의해서도 progesterone(P$_4$)으로 전환되었다. 그러나 가장 작은 여포에서는 P$_4$를 첨가했을 때에도 역시 같은 현상이 나타났다. 작은 여포와 중간 여포들에 의한 전환된 스테로이드들의 양을 단위표면적의 전환량으로 계산 비교해 본 결과 전환된 양은 거의 같았다. 이는 작은 여포의 여포세포들 (granulosa cells)이 이미 E$_2$에 이르는 모든 중간 산물들을 생성할 능력을 가졌다는 것을 의미한다. 그러나 이들이 FPH에 의해서는 스테로이드를 조금밖에 생성하지 못하는 것으로 보아 아직 부족한 또다른 요인들이 있는것으로 추정된다.

• Journal of Advanced Marine Engineering and Technology
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• 제21권5호
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• pp.535-541
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• 1997

The effect of concentration of each solution( HCI, $H_2SO_4$ and $HNO_3$), scan rate and polished surface condition on the corrosion of AISI 304 Stainless Steel were investigated, utilizing the Method ASTM G5 - 87. It can be concluded that: 1) For the same concentration(i.e. 1N) of each solution the corrosion rate is the highest in HCI and lowest in $HNO_3$. Also, the difference of values of $i_{cirt}$ generated for each solution is significant. 2) As the concentration of the solution $H_2SO_4$ is increased (O.5N, 1N, 2N) the values of $E_{cor}$ $i_{crit}$ and $i_{p}$ are increased. 3) In case of existence of SCN ion of O.OlN, the values of iCTIt and ip generated are approximately 100 times and 1.4 times higher respectively, than in the case of non - existence of $SCN^{-}$. However the existence of $SCN^{-}$ doesn't affect the value of $E_{cor}$ and $E_{p}$. 4) The values of $i_{crit}$ and $i_{p}$ are increased due to the increase of scan rate. But the values of $E_{cor}$ and $E_{p}$ do not depend on the scan rate. 5) The $i_{p}$ value depends greatly on oxygen in the solution, but the changes in values of $E_{cor}$ $i_{crit}$ and $E_{b}$ due to the oxygen are insignificant. 6) If a component is polished using #400, #600 and #800 wet polish paper, the effect of surface condition on variations of values of $i_{crit}$ and $i_{p}$ is slightly significant.

• Genomics & Informatics
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• 제7권4호
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• pp.187-194
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• 2009

Cytochrome P450 2E1 (CYP2E1) is a member of the cytochrome P450 superfamily, and it is a key enzyme responsible for the metabolic activation of many smallmolecular-weight compounds such as alcohol, which is classified as a human carcinogen. In this study, we identified 19 single nucleotide polymorphisms (SNPs) in CYP2E1 in Korean population. In these SNPs, we examined possible genetic association of CYP2E1 polymorphisms with HBV clearance and the risk of hepatocellular carcinoma (HCC). Five common polymorphic sites were selected, CYP2E1 polymorphisms at rs381-3867, rs3813870, rs2070673, rs2515641 and rs2480257, considering their allele frequencies, haplotype-tagging status and LDs for genotyping in larger-scale subjects (n=1,092). Statistical analysis demonstrated that CYP2E1 polymorphisms and haplotypes show no significant association with HBV clearance, HCC occurrence and onset age of HCC (p>0.05). Previous studies, however, have shown contradictory findings on associations of CYP2E1 polymorphisms with CYP2E1 activities and HCC risk. Comparing the contrasting results of previous researches suggest that CYP2E1 polymorphism is associated with CYP2E1 activity induced by ethanol, but is not directly associated with HCC risk. CYP2E1 variation/haploype information identified in this study will provide valuable information for future studies on CYP2E1.

• 대한수학회논문집
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• 제39권1호
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• pp.31-43
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• 2024

Let $R_e\,=\,\frac{{\mathbb{F}}_{p^m}[u]}{{\langle}u^e{\rangle}}$, where p is a prime number, e is a positive integer and u^e = 0. In this paper, we first characterize the structure of cyclic codes of length p^s over R_e. These codes will be classified into 2^e distinct types. Among other results, in the case that e = 4, the torsion codes of cyclic codes of length p^s over R₄ are obtained. Also, we present some examples of cyclic codes of length p^s over R_e.