• 대한수학회논문집
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• 제12권1호
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• pp.59-67
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• 1997

Let $K'_M$ be the space of distributions on $R^m$ which grow no faster than $e^{M(kx)}$ for some k > 0 and an index function M(x) and $K'_M$ be the Fourier transform of $K'_M$. We establish the characterizations of the space $O_M(K'_m;K'_M)$ of multipliers in $K'_M$.

• 한국수산과학회지
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• 제8권1호
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• pp.11-19
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• 1975

황해 및 동지나해에서 한국기선저인망, 안강망, 유자망, 일본기선저인망으로서 어획되는 참조기(Pseudosciaena manchurica의 자원량변동에 대해서 (1)식으로 표현되는 자원량변동의 수학적 $\lceil$모델$\rfloor$에 의하여 어획능율 및 겉보기 자연사망계수를 구하고 나아가서 어획계수, 어획능율등을 구하여 이들 자원량특성식을 이용하여 전후반어기의 자원량변동상태를 계산하였다.

• 한국산학기술학회논문지
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• 제12권10호
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• pp.4660-4665
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• 2011

리튬 흡착제용 신규 전구체인 $Li_{1.6}(MnM)_{1.6}O_4$ (M=Cu, Ni, Co, Fe)을 수열법에 의해 합성한 후에, 물리화학적인 성질을 고찰하였다. XRD와 HRTEM을 이용한 분석 결과로부터 Co를 도핑한 경우에는 본래의 스피넬 구조가 유지되는 반면에, Cu, Ni, Fe를 도핑한 경우에는 구조적인 변화가 발생하는 것을 확인하였다. Co 도핑에 의해 확인된 구조의 안정화는 산처리에 의해 리튬을 침출시킨 후에도 유지되었다. 해수에 함유된 리튬을 흡착하는 효율은 Co가 도핑된 망간 산화물 인 $Li_{1.6}[MnCo]_{1.6}O_4$가 상업적으로 적용 가능한 $Li_{1.33}Mn_{1.67}O_4$ 보다 우수한 특성을 나타내었다. 해수 1g으로부터 흡착되는 Li의 양은 $Li_{1.6}[MnCo]_{1.6}O_4$를 사용했을 경우에 35mg이었고, $Li_{1.33}Mn_{1.67}O_4$을 사용했을 경우에는 16mg 이었다.

• Asian Pacific Journal of Cancer Prevention
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• 제17권7호
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• pp.3595-3600
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• 2016

Background: To investigate the association between preoperative pathological Ki-67 labeling index and serum tumor marker cancer antigen 15-3 (CA 15-3) with clinic-pathological parameters and treatment outcomes in early breast cancer. Materials and Methods: A retrospective study at 4 cancer centers in Saudi Arabia and Egypt was performed. Data were collected for female patients diagnosed with unilateral early breast cancer between March 2010 and October 2013. Cases treated with neoadjuvant chemotherapy (NACT) followed by surgery and radiotherapy were included. NACT included 6-8 cycles of anthracycline and taxane based regimens. Trastuzumab and hormonal treatments were added according to HER2 and hormone receptor status. Baseline serum CA15.3 and pathological Ki67 levels were evaluated and correlated with disease free survival (DFS) and overall survival (OS). Results: A total of 280 pts was included. The median age was 49 years (38-66 y) and median overall survival was 35 (20-38) months (mo). Estrogen receptors (ER), progesterone receptors (PR) and HER 2 receptors were positive in 233 (83.2%), 198 (70%) and 65 cases (23.2%), respectively. High preoperative Ki67 and CA15.3 were noted in 177 (63.2%) and 131 (46.8%). A total of 45 (16%) patients had distal or local recurrence and 24 (8.6%) died of their disease. Most of the relapsed cases had high preoperative Ki-67 (n=41, 91%) and CA15.3 (n=28, 62%) values. All of the patients who died had a high Ki-67 but CA15.3 was high in 9 (37%) only. Mean DFS/OS in patients with high preoperative Ki-67 was 32 months /32 months as compared to 37 months/35 months in those with normal Ki-67 (p<0.001). Correlation of preoperative CA15.3 and survival was statistically not significant. Conclusions:Preoperative Ki-67 can be a predictive and prognostic marker. Higher levels are associated with poor DFS and OS in patients with early BC.

• 대한지질공학회:학술대회논문집
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• 대한지질공학회 2002년도 정기총회 및 학술발표회
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• pp.61-73
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• 2002

울산광역시 울주군 두동면 천전리 306번지 일대에 건설되는 대곡댐은 높이 52m, 길이 190m의 표면차수벽형 석괴댐이다. 대곡댐 건설사업과 관련하여 여수로 좌안사면 굴착공사를 시행 중 2000. 7. 23 13:00~7. 24. 04:00 67.0mm의 강우가 있은 후 Sta. No. 1~2, EL. 137~134m 지점에 균열이 발생하였다. 안정대책을 수립하고자 지표지질조사 및 평사투영법에 의한 안정성을 검토하고 굴착 후 예상되는 불안정 요소를 고려하여 사면의 부분적인 추가절취 및 Pre-stress가 가능한 SSL PC Anchoring에 의한 억지공법을 수립, 시공하였다.

• 미생물학회지
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• 제42권2호
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• pp.149-152
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• 2006

분열효모인 Schizosaccharomyces pombe에서 mRNA의 핵에서 세포질로의 이동에 관여할 것으로 여겨지는 spThp1 유전자의 결실돌연변이주(deletion mutant)를 제조하여 그 특성을 조사하였다. 이배체(diploid) 균주의 한 spThp1 유전자를 결실시킨 후 4분체분석(tetrad analysis)을 수행한 결과, 이 유전자는 생장에 필수적이지 않았다. 또한 결실돌연변이주는 mRNA 수송도 큰 결함을 보이지 않았다. 하지만 spThp1 는 mRNA의 운반체를 암호화하고 있는 spMex67와 합성치사(synthetic lethality)를 보였다. 이 결과는 분열효모의 spThpl도 mRNA의 핵에서 세포질로의 이동에 역할을 하고 있음을 암시한다.

• 대한화학회지
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• 제67권5호
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• pp.339-347
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• 2023

In this study, a nanocomposite of multi-walled carbon nanotubes@poly(p-phenylenediamine)-Prussian blue (MWCNTs@PpPD-PB) was synthesized and employed for the electrochemical detection of hydrogen peroxide (H₂O₂). A straightforward approach was utilized to prepare an electrochemical H₂O₂ sensor using a MWCNTs@PpPD-PB modified glassy carbon electrode, and its electrochemical behavior was investigated through techniques such as electrochemical impedance spectroscopy, cyclic voltammetry, and amperometry. The modified electrode displayed a favorable electrocatalytic response towards the reduction of H₂O₂ in an acidic solution. The developed sensor exhibited linearity in the concentration range of 0.005 mM to 2.225 mM for H₂O₂, with high sensitivity (583.6 ㎂ mM^-1cm^-2) and a low detection limit (0.95 ㎛, S/N = 3) at an applied potential of +0.15 V (vs. Ag/AgCl). Additionally, the sensor demonstrated excellent selectivity, reproducibility, and stability. Moreover, successful detection of H₂O₂ was achieved in real samples.

• Journal of Electrochemical Science and Technology
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• 제12권4호
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• pp.458-464
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• 2021

Lithium ion batteries (LIBs) is a kind of rechargeable secondary battery, developed from lithium battery, lithium ions move between the positive and negative electrodes to realize the charging and discharging of external circuits. Zeolitic imidazolate frameworks (ZIFs) are porous crystalline materials in which organic imidazole esters are cross-linked to transition metals to form a framework structure. In this article, ZIF-67 is used as a sacrificial template to prepare nano porous carbon (NPC) coated cobalt nanoparticles. The final product Co/NPC composites with complete structure, regular morphology and uniform size were obtained by this method. The conductive network of cobalt and nitrogen doped carbon can shorten the lithium ion transport path and present high conductivity. In addition, amorphous carbon has more pores that can be fully in contact with the electrolyte during charging and discharging. At the same time, it also reduces the volume expansion during the cycle and slows down the rate of capacity attenuation caused by structure collapse. Co/NPC composites first discharge specific capacity up to 3115 mA h/g, under the current density of 200 mA/g, circular 200 reversible capacity as high as 751.1 mA h/g, and the excellent rate and resistance performance. The experimental results show that the Co/NPC composite material improves the electrical conductivity and electrochemical properties of the electrode. The cobalt based ZIF-67 as the precursor has opened the way for the design of highly performance electrodes for energy storage and electrochemical catalysis.

• Parasites, Hosts and Diseases
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• 제39권1호
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• pp.67-76
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• 2001

This experiment was focused on the characterization of anti- Toxoplasma monoclonal antibodies (mAbs) and the effect of mAbs on the parasite invasion of mouse peritoneal macrophages. Twenty eight mAbs including M110, M556, R7A6 and M62l were characterized by Ab titer, immunoglobulin isotyping and western blot pattern. Antibody titer (optical density) of 4 mAbs. Ml 10. M556. R7A6 and M62l. were 0.53,0.67, 0.45 and 0.39 (normal mouse serum; 0.19) with the same IgGl isotypes shown by Enzyme-linked immunosorbent assay (ELISA). Western blot analysis showed that Ml 10. M556. R7A6 and M62l reacted with the 33 kDa (p30),31 kDa (p28),43 kDa and 36 kDa protein. Immuno-gold labelling of mAbs M110, M556, R7A6 and M621 reacted with the surface membrane, dense granules and parasitophorous vacuolar membrane (PVM) , rhoptries and cytoplasm of tachyzoite, respectively. For in vitro assay, preincubation of tachyzoties with four mAbs, Ml 10, M556, R7A6 and M62l resulted in the decrease of the number of infected macrophages (p < 0.05) and the suppression of parasite multiplication at 18 h post-infection. Four monoclonal antibodies including Ml 10 (SAGI) were found to have an important role in the inhibition of macrophage invasion and T. gondii multiplication in vitro, and these mAbs may be suitable for vaccine candidates, diagnostic kit and for chemotherapy.

• East Asian mathematical journal
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• 제33권1호
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• pp.67-74
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• 2017

Let k, m and t be positive integers with $m{\geq}4$ and even. It is shown that $K_{km+1(2t)}$ has a decomposition into gregarious m-cycles. Also, it is shown that $K_{km(2t)}$ has a decomposition into gregarious m-cycles if ${\frac{(m-1)^2+3}{4m}}$ < k. In this article, we make a remark that the decompositions can be circulant in the sense that it is preserved by the cyclic permutation of the partite sets, and we will exhibit it by examples.