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哺乳動物 卵胞卵의 琉璃化凍結後 FDA-test에 의한 生存性 判定
康珉秀,張德支,梁柄哲,金重桂,高敬來,高赫辰 제주대학교 방사능이용연구소 1995 연구보고 Vol.9 No.-
本 實驗은 琉璃化凍結 融解된 포유동물 卵胞卵의 生存性을 FDA-test에 의한 판정을 규명하기 위하여 실행되었으며 Oocytes는 卵丘細胞의 부착 상태에 따라 3 group 분류하였다. A oocyte는 卵丘細胞가 밀착되어 부착된 것(tight oocytes)이며 B oocyte는 卵丘細胞가 部分的으로 부착된 것(partial oocytes) 그리고 C oocyte는 卵丘細胞가 빈약하게 부착된 것(poor oocytes)이다. 琉璃化 凍結液은 1992년 金 등에 의한 연구에서 개발된 것으로서 glycerol 20 %, ethylene glycol, 10%, Ficoll 30% 와 sucrose 10% 로 구성되어 있다. Oocyte(7-10)는 10분의 평형시간을 경과한 후 0.25 ㎖ straw에 넣어 상온에서 직접 액체질소 container(-196℃)에 침지시켜 동결을 완료시켰다. 凍結融解한 A 그룹 난자의 FDA-score는 rat(4.2)에서 rabbit(3.9), cow(3.8), mouse(3.4)와 porcine(2.4)보다 높았지만 cumulus cell의 경우는 rabbit(4.7)에서 rat(4.1), cow(2.9), porcine(2.6)과 mouse(1.4)보다 높았다. 凍結融解한 B 그룹 난자들의 FDA-score는 각각 3.1(cow), 2.9(rabbit), 2.9(mouse), 2.6(rat) 그리고 2.5(porcine)이였다. 하지만 cumulus cell의 경우는 rabbit(3.7)에서 porcine(2.6), rat(2.3), cow(1.7) and mouse(0.3)보다 높았다. 凍結融解한 C 그룹 난자의 FDA-score는 mouse(4.1)에서 cow(2.9), rabbit(2.6), rat(1.3)과 porcine(1.1)에서 보다 높았다. 以上의 結果에서 mouse를 제외하고 일반적으로 난포난의 琉璃化 凍結融解 후 group A의 난자가 group B와 C에서 난자보다 生存率이 높았으며 FDA-test를 하였을 때 oocytes는 물론 cumulus cell에서도 발광을 나타내어 卵丘細胞의 생존판정여부를 확인할 수 있는 가능성을 제시하였다. This experiment was carried out to study the determination of survival of vitrified and thawed mammal follicular oocytes by FDA-test. Oocytes were divided into 3 groups according to attachment of cumulus cell. Group A oocytes were tightly surrounded by cumulus cell, group B oocytes were partially surrounded by cumulus cell, and group C oocytes were poorly surrounded by cumulus cell. Vitrification solution developed by our previous study (Kim et al, 1992) which consisted of permeable agent (20% glycerol + 10 % ethylene glycol) and nonpermeable agent (30 % Ficoll + 10 % sucrose). Oocytes (7-10) loaded into 0.25 ㎖ straw after 10 min equilibration were plunged into liquid nitrogen (-196℃) directly. The FDA-score of vitrified and thawed group A oocytes was higher in rat (4.2) than in rabbit (3.9), cow(3.8), mouse (3.4) and porcine(2.4), however that of cumulus cell was higher in rabbit (4.7) than in rat (4.1), cow(2.9), porcine(2.6) and mouse (1.4). The FDA-score of vitrified and thawed group B oocytes were 3.1(cow), 2.9 (rabbit), 2.9 (mouse), 2.6 (rat) and 2.5(porcine), respectively. However that of cumulus cell was higher in rabbit (3.7) than in porcine(2.6), rat(2.3), cow(1.7) and mouse(0.3). The FDA-score of vitrified and thawed group C oocytes was higher in mouse (4.1) than in cow(2.9), rabbit(2.6), rat(1.3) and porcine(1.1). As shown in the above results, The survival rates of oocytes were higher in group A than in group B and C except in mouse and cow. These results suggest that the survival of cumulus cell as well as follicular oocytes can be reliably judged by their fluorescence with FDA-test.
육성비육돈에 대한 사료첨가제 첨가 급여시험 - 생균제의 첨가가 육성비육돈의 성장과 육질에 미치는 영향 -
양승주,현재석,양창범,고석민,최홍훈 ( S . J . Yang,J . S . Hyon,C . B . Yang,S . M . Ko,H . H . Choi ) 한국축산학회 1998 한국축산학회지 Vol.40 No.1
This research was conducted to investigate the effects on the growth performance, feed intake, feed conversion and carcass characteristics of the growing-finishing pigs with 4 kinds of feed additives wmposed of probiotics which were used in the swine farm of ChejuDo area. Two experiments were conducted in the W-farm (high energy and protein, Spring) and B-farm(low energy and protein, Summer). The experiment was designed with 5 treatments according to the kinds of additives used(T; control, A; Biopro, B; Ataphon-o, C; YC-2000, D; Photo-plus). In the W-farm experiment, 75 three-way crossbred pigs weighing average 38㎏ were randomized with 3 replications for 102 days. In the B-farm experiment, 105 three-way crossbred pigs weighing average 33㎏ were randomized with 3 replications for 103 days. Daily weight gains were increased a little by supplementing the probiotics in comparison with control(T). But there were not significant differences among the treated goups. There were no differences in feed intake among treatments in the W-farm. But in the B-farm a little inaease in feed intake was observed in the probiotics group. However, feed conversion rates were somewhat improved by the probiotics compared to control(T) in the W-farm, but they were not significantly different. Carcass weight and percentage were increased a little in the pigs fed the probiotics compared to the control (T). The pigs fed probiotics A and B showed apparently higher carcass weights and rates without statistical differences compared to the others. In the W-farm the symptom of overfattening was observed in the control(T) and the treatment C. However, the backfat thicknesses of the treatment A, B and D were suitable. In the B-farm the backfat thicknesses of the control(T) and the treatment C were poor and scanty, but those of the treatment A, B and D resulted in suitable thickness. According to the carcass Bade analysis, the carcass grades of the experimental pigs showed the following order; A $gt; B $gt; D $gt; C $gt; Control(T). The improvement of carcass grade was made by the dietary probiotics. According to the result of the taste panel evaluation, the dietary probiotics made a good effect on the meat colour and marbling, tenderness, meat flavour and meat juiciness of the pork.
Ko, J.,Jeong, H.,Choi, S.Y.,Rotermund, F.,Yeom, D.I.,Kim, B.Y. Elsevier 2017 Current Applied Physics Vol.17 No.1
<P>We demonstrated four different laser operational states in the same passive fiber ring laser cavity by controlling solely the polarization state in a saturable absorber. The demonstrated laser operational states were continuous wave, mode-locking, Q-switching, and Q-switched mode-locking. The saturable absorber was fabricated by spin-coating a single-walled carbon nanotubes (SWCNT)/polymer composite on a side polished fiber providing enhanced nonlinear interaction with the SWCNT. The wide tuning range of the saturable absorber allows the simple means to generate different forms of laser output from a single laser cavity. (C) 2016 Elsevier B. V. All rights reserved.</P>
B*39:60, a novel HLA‐B*39 allele identified by sequence‐based typing
Ko, S.‐,Y.,Oh, H.‐,B.,Heo, Y.‐,S.,Jun, J. H.,Kwon, O.‐,J. Blackwell Publishing Ltd 2011 Tissue antigens Vol.77 No.2
<P>The new allele B*39:60 showed one nucleotide difference with B*39:01:01 at codon 152 (GTG/GCG).</P>
고관영,명노훈,하종성,이창수,최창권,최병용,허기영,김광수,김동수,장종훈,장윤철,김세환,오정민,하민정,박향자 울산과학대학 2000 연구논문집 Vol.27 No.1
본 연구는 자체 제작한 전체 패드가 부착된 드로잉 금형을 이용하여 SUS, 연강, AI, 6:4황동 판재를 드로잉 가공하여 생산된 제품의 특성을 자유드로잉 하여 얻은 제품의 특성과 비교 분석하였다. SUS 판재의 경우 제품에 발생하는 현상은 벽 주름, 구변주름, 수직 파단, 드로잉상처, 이어링이 발생하였으며 길이변화는 펀치어깨부분에서 가장 많이 늘어남을 볼 수 있었고 벽 주름 부분에 있어서 접혀진 부분은 상대적으로 적게 늘어남을 볼 수 있었다. 연강 판재는 SUS 판재에서 보여준 현상을 나타내었으나 SUS 판재에 비해 수직 파단은 적게 일어난 반면 이어링이 더 크게 일어났다. AI 판재의 경우 수직 파단은 일어나지 않았으나 플랜지 주름과 밑면터짐이 발생하였다. 6:4황동의 경우는 전체패드의 AI 판재 드로잉에서와 같이 밑면터짐과 플랜지 주름의 발생이 일어났다.
Ko, Y.J.,Park, Y.K.,Yun, B.K.,Lee, M.,Jung, J.H. Elsevier 2014 Current Applied Physics Vol.14 No.11
<P>We report the pyroelectric power generation of a relaxor ferroelectric 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) (PMN-PT) single crystal. For a temperature variation rate of 0.5 K/s, the PMN-PT generated a closed-circuit current of 10 nA and an open-circuit voltage of 1.1 V at room temperature. The pyroelectric current and voltage of the PMN-PT single crystal were proportional to the temperature variation rate and were sharply enhanced near the structural phase-transition temperature. Additionally, the PMN-PT pyroelectric generator produced stable power for excessive thermal cycling and was highly sensitive to random thermal fluctuations. Our results indicate the potential importance of PMN-PT for high-power pyroelectric generator applications. (C) 2014 Elsevier B.V. All rights reserved.</P>
Ko, H.M.,Koppula, S.,Kim, B.W.,Kim, I.S.,Hwang, B.Y.,Suk, K.,Park, E.J.,Choi, D.K. North-Holland ; Elsevier Science Ltd 2010 european journal of pharmacology Vol.633 No.1
Activated microglia participate in neuroinflammation which contribute to neuronal damage. Suppression of microglial activation would have therapeutic benefits, which lead to alleviation of the progression of neurodegeneration. In this study, the inhibitory effects of inflexin, a putative antiinflammatory agent isolated from Isodon excisus (Max.) Kudo (Labiateae), on the production of proinflammatory mediators were investigated in the lipopolysaccharide (LPS)-stimulated microglia. Inflexin significantly inhibited the release of nitric oxide (NO). Consistently, both the mRNA and the protein levels for the inducible NO synthase were decreased by inflexin in a concentration-dependent manner. Inflexin also inhibited the expression of cyclooxygenase (COX)-2, but not the COX-1 and effectively reduced the LPS-induced expression of proinflammatory cytokines in a dose-dependent manner. Furthermore, inflexin inhibited the degradation of IκB-α and the activation of NF-κB, p65 and Akt, while the MAPKs signal pathway was not affected. Our data suggest that inflexin was able to suppress neuroinflammation via inhibition of NF-κB activation and Akt pathway indicating that inflexin may be developed as a potent therapeutic agent in treating neuroinflammatory diseases.