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      • Measurements of B→J/ψ at forward rapidity in p+p collisions at s=510 GeV

        Aidala, C.,Ajitanand, N. N.,Akiba, Y.,Akimoto, R.,Alexander, J.,Alfred, M.,Aoki, K.,Apadula, N.,Asano, H.,Atomssa, E. T.,Attila, A.,Awes, T. C.,Ayuso, C.,Azmoun, B.,Babintsev, V.,Bai, M.,Bai, X.,Banni American Physical Society 2017 Physical Review D Vol.95 No.9

        <P>We report the first measurement of the fraction of J/psi mesons coming from B-meson decay (F (B -> J/psi)) in p + p collisions at root s = 510 GeV. The measurement is performed using the forward silicon vertex detector and central vertex detector at PHENIX, which provide precise tracking and distance-of-closest-approach determinations, enabling the statistical separation of J=. due to B-meson decays from prompt J/psi. The measured value of F (B -> J/psi) is 8.1% +/- 2.3% (stat) +/- 1.9% (syst) for J/psi with transverse momenta 0 < p(T) < 5 GeV/c and rapidity 1.2 < vertical bar y vertical bar < 2.2. The measured fraction F (B -> J/psi) at PHENIX is compared to values measured by other experiments at higher center of mass energies and to fixed-order-next-toleading- logarithm and color-evaporation-model predictions. The b (b) over bar cross section per unit rapidity [d sigma/dy(pp -> b (b) over bar)] extracted from the obtained F (B -> J/psi) and the PHENIX inclusive J/psi cross section measured at 200 GeV scaled with color-evaporation-model calculations, at the mean B hadron rapidity y = +/- 1.7 in 510 GeV p + p collisions, is 3.63(-1.70)(+1.92) mu b. It is consistent with the fixed-order-next-toleading- logarithm calculations.</P>

      • KCI등재

        Nd₂Fe₁₄B 희토류 영구자석의 전자기적 물성연구

        민병일(B. I. Min),정윤희(Y. H. Jeong),양충진(C. J. Yang) 한국자기학회 1992 韓國磁氣學會誌 Vol.2 No.3

        희토류 영구자석, Nd₂Fe₁₄B 화합물에 대한 자체충족적 국재밀도함수근사 전자 구조 계산을 수행하여 이 물질의 전자기적 물성을 연구하였다. LMTO(Linearized Muffin-Tin Orbital)에너지 띠 방법을 사용하여 상자성, 강자성상에서 구한 Nd₂Fe₁₄B 화합물의 에너지 띠구조를 토대로 하여 자성을 포함한 제반 물성, 즉 희토류금속과 천이금속의 결합(bonding)효과, 전기적, 자기적 구조등을 고찰하였다. Boron원자의 역학은 근접 Fe 원자와의 혼합 상호작용을 통하여 Fe의 원자의 자기모멘트를 많이 줄이는 효과를 주며 또한 구조 안정성에 기여한다는 결과를 얻었다. 강자성상에서의 Fe 원자들의 평균 자기모멘트는 약 2.15 μ_B로 계산되었는데 이중 Boron 원자로부터 가장 멀리 떨어져 있으며 12개의 Fe 원자들로 둘러싸인 Fe (j2-site)원자가 가장 큰 값(2.7 μ_B)의 자기모멘트를 갖고 Boron 원자와의 혼합 상호작용이 가장 큰 Fe(e-site)원자가 가장 작은 값(1.9 μ_B)의 자기모멘트를 갖는다. Electronic and magnetic propertis of the rare-earth permanent magnet, Nd₂Fe₁₄B, are investigated by performing self-consistent local density functional electronic structure calculations. Employing the LMTO (linearized muffin-tin orbital) band method, we have obtained the electronic band structures for both paramagnetic and ferromagnetic phases of Nd₂Fe₁₄B. Based on the energy band structures, we have studied various physical properties, such as electronic and magnetice structures, we have studied various physical properties, such as electronic and magnetic structures and the bonding effect between the rare-earth and transition metals. It is found that the boron atom substantially reduces the magnetic moment of neighboring Fe atoms through the hybridization interaction and that it plays an important role in stabilizing the structure. The average magnetic moment of Fe atoms in the ferromagnetic phase is estimated to be 2.15 μ_B. The Fe atom in the j2-site, which is located farthest from the B atom and surrounded by 12 Fe nearest neighbors, has the biggest magnetic moment (2.7 μ_B), while the Fe in the e-site, which interacts most strongly with B atoms, has the smallest magnetic moment (1.9 μ_B).

      • SCISCIESCOPUS

        Adenosine triphosphate-based chemotherapy response assay-guided chemotherapy in unresectable colorectal liver metastasis

        Hur, H,Kim, N K,Kim, H G,Min, B S,Lee, K Y,Shin, S J,Cheon, J H,Choi, S H Nature Publishing Group 2012 The British journal of cancer Vol.106 No.1

        <P><B>Background:</B></P><P>This study aims to evaluate the effectiveness of adenosine triphosphate-based chemotherapy response assay (ATP-CRA)-guided neoadjuvant chemotherapy for increasing resectability in patients with unresectable colorectal liver metastasis.</P><P><B>Patients and methods:</B></P><P>Patients were randomised into two groups: Group A was treated by conventional chemotherapy regimen and Group B was treated by chemotherapy regimen according to the ATP-CRA. Three chemotherapeutic agents (5-fluorouracil, oxaliplatin and irinotecan) were tested by ATP-CRA and more sensitive agents were selected. Either FOLFOX or FOLFIRI was administered. Between Group A and B, treatment response and resectability were compared.</P><P><B>Results:</B></P><P>Between November 2008 and October 2010, a total 63 patients were randomised to Group A (<I>N</I>=32) or Group B (<I>N</I>=31). FOLFOX was more preferred in Group A than in Group B (26 out of 32 (81.3%) <I>vs</I> 20 out of 31 (64.5%)). Group B showed better treatment response than Group A (48.4% <I>vs</I> 21.9%, <I>P</I>=0.027). The resectability of hepatic lesion was higher in Group B (35.5% <I>vs</I> 12.5%, <I>P</I>=0.032). Mean duration from chemotherapy onset to the time of liver resection was 11 cycles (range 4–12) in Group A and 8 cycles (range 8–16) in Group B.</P><P><B>Conclusion:</B></P><P>This study showed that tailored-chemotherapy based on ATP-CRA could improve the treatment response and resectability in initially unresectable colorectal liver metastasis.</P>

      • 反芻胃 Celluloytic Bacteria에 의한 섬유소 분해 및 비구조 탄수화물의 이용성에 관한 硏究

        민병렬,김범석,맹원재 건국대학교 동물자원연구센터 1991 動物資源硏究誌 Vol.16 No.-

        본 실험은 반추위내에 존재하는 주요한 cellulolytic bacteria를 選擇 및 非選擇培地를 사용하여 면양의 rumen내에 존재하는 celluloytic bacteria를 사용하여 纖維素 分解菌 각각의 纖維素源의 分解度, 비구조 탄수화물의 이용성 및 휘발성 지방산의 생성량을 측정하였다. 본 실험결과를 요약해 보면 다음과 같다. 1) In vitro상에서 Corn stover, alfalfa, rice straw 및 filterpaper No.1등의 섬유소원에 대한 R.flavefaciens의 평균 DM 소화율은 10.75%로 가장 높은 소화율을 나타내었으며, B.succinogenes, Buty. fibrisolvens 및 B. ruminicola subsp. 등은 각각 8.20%, 5.66% 및 2.5%의 DM소화율을 나타내었다.(p<0.05). 2) 섬유소원에서의 평균 microbial dry cell生成量은 R.flavefaciens. B.succinogenes, Buty.fibrisolvens 및 B.rumminicola subsp. 등이 각각 11.4, 4.47, 6.38 및 1.13mg/100ml를 가장 높은 미생물 cell의 생성량을 나타내었다. 3) ADF 및 NDF 평균 소화율은 R.flavefaciens가 가장 높았으며(23.61% 및 39.87%), B.succinogenses는 각각 11.16% 및 35.91%의 분해도를 나타내었다. Buty. fibrisolvens는 16.82% 및 24.34%로서 가장 낮은 분해도를 나타내었다. CEllulose消化率은 B.succinogenes가 14.43%로 R.flavefaciens(11.11%)보다 높은 분해율을 나타내었다. 4) 비구조 炭水化物 利用率은 (OD=670nm)R.flavefaciens가 mannose, arabinose 및 xylose 등을 가장 잘 이용하며, B. ruminicola subsp.은 galactose, mannose, arabinose 및 xylose등을 가장 잘 이용하는 것으로 나타났다. B.succinogenes는 glucose 및 rffainose를 가장 잘 이용하며, B.fibrisolvens는 glucose, galactose, arabinose, xylose 및 maltose등을 가장 잘 이용하는 것으로 나타났다. (P<0.05). 5) PYG basal medium에 炭水化物源을 각각 1g씩 첨가한 培養區에서 VFA 생성량은 R.flavefaciens는 주로 acetate, propionate, n-butyrate 및 succinate를 생산하는 것으로 나타났으며, 이것들의 생산량은 각각 81.65, 26.36, 20.16 및 108.91mM/100ml를 생산하여 succinate를 가장 많이 생산하는 것으로 나타났다. B.ruminicola subsp은 주로 acetate, propionate 및 n-butyrate를 생산하는 것으로 나타났으며, 이 균의 생산량은 각각 104.72, 31.32 및 26.12mM/100ml를 생산하였으며, B. succinogenes는 주로 acetate, propionate, n-butyrate 및 succinate를 생산하며, 이 균들의 생산량은 각각 87.66, 27.70 및 56.07mM/100ml 생산하였다. Buty.fibrisolvens는 주로 acetate, propionate 및 n-butyrate를 생산하는 것으로 나타났다. Fiber degradation of corn stover, rice straw, alfalfa or filter paper No.1 was evaluated using microscopy and in vitro analyses after incubation with pure culture of cellulolytic ruminal bacteria. 1) Analyses of the initial substrate and the recovered residue after 24h of static incubation showed that R.flavefaciens degraded a mean dry matter(10.75% versus 5.66%) more effectively than B. succinogenes. However, B, succinogenes demonstrated a qualitative advantage in degrading cellulose of particular substrates. DM digestibilities for alfalfa and rice straw. Treatment for 24h were 13.96% and 9.46% for R.lflavefaciens, 10.27% and 4.32% for B.succinogenes, and 7.74% and 2.31% for Buty. fibrisolvens(p<0.05). Bacteriodes ruminitola subsp. was unable to degrade plant cell wall components, while it degraded non-structural carbohydrates more actively than any other bacteria. Microbial cell DM yield(avg, 11.44mg/dl) was the highest for R. flavefaciens cultured with alfalfa substrate(p<0.05). 2) Ruminococcu flavefaciens degraded a mean 23.61% of the ADF and 39.87% of the NDF in the various substrates. whereas, B. succinogenes degraded a mean 11.6% and 35.91% of these fractions, respectively. 3) The utilization of carbodydrates was the highest for R.flavefaciens cultured with mannose and xylcse substrate, and for B. ruminicola subsp. with arabinose, xylose, raffinose and galactose respectively. B. succinogenes utilized glucose and raffinose, as major substrates fermentd(p<0.05) and Buty. fibrisolvens utilized glucose, galactose, arabinose, xylose and maltose. 4) Ruminococcus flavefaciens produced acetate, succinate and propionate, and B.ruminicola subsp. produced acetate, propionate and n-butyrate as major VFA. B.succinogenes produced acetate, propionate, n-butyrate and succinate, and Buty.fibrisolvens produced n-butyrate and acetate as major VFA.

      • Aggravation of post-ischemic liver injury by overexpression of A20, an NF-κB suppressor

        Yu, J.,Lee, H.S.,Lee, S.M.,Yu, H.C.,Moon, W.S.,Chung, M.J.,Park, J.W.,Park, B.H. Elsevier Science Publishers 2011 Journal of hepatology Vol.55 No.2

        Backgroud & Aims: A20 is an intracellular ubiquitin-editing enzyme that plays an important role in the negative feedback regulation of NF-κB activation in response to a diverse range of stimuli. Liver ischemia/reperfusion injury is associated with rapid activation of NF-κB signaling, but the role of NF-κB in hepatic ischemia/reperfusion injury remains controversial. The NF-κB signaling pathway mediates both protective and deleterious effects in the liver. Here, we examined whether A20 inhibited or aggravated hepatic ischemia/reperfusion injury. Methods: We used IκBα super-repressor as a positive control and overexpressed A20 and IκBα super-repressor in the liver of C57BL/6 mice. Mice underwent 45min of partial hepatic ischemia and were then reperfused. Results: Protein level of A20 was increased after reperfusion. Mice subjected to ischemia/reperfusion injury showed increased NF-κB activation, as evidenced by phosphorylation of IκBα and nuclear translocation of NF-κB. Prior transfection with Ad-A20 or Ad-IκBα super-repressor attenuated NF-κB activation and aggravated liver injury. Serum aminotransferases and proinflammatory cytokines, hepatocellular necrosis, and hepatic neutrophil infiltration were markedly increased compared to those of uninfected or control virus infected mice. In addition, A20 abolished the beneficial effect of ischemic preconditioning. Conclusions: Our results suggest that inhibition of NF-κB activation by A20 aggravated partial hepatic ischemia/reperfusion injury. Understanding how the NF-κB pathway plays a role in directing a clinical outcome may lead to better prospects of more rational approaches to reduce post-ischemic liver injury.

      • SCISCIESCOPUS

        Development of an antibody-based diagnostic method for the identification of Bemisia tabaci biotype B

        Baek, J.H.,Lee, H.J.,Kim, Y.H.,Lim, K.J.,Lee, S.H.,Kim, B.J. Academic Press 2016 Pesticide biochemistry and physiology Vol.131 No.-

        <P>The whitefly Bemisia tabaci is a very destructive pest. B. tabaci is composed of various morphologically undistinguishable biotypes, among which biotypes B and Q, in particular, draw attention because of their wide distribution in Korea and differential potentials for insecticide resistance development. To develop a biotypespecific protein marker that can readily distinguishes biotypes B from other biotypes in the field, we established an ELISA protocol based on carboxylesterase 2 (COE2), which is more abundantly expressed in biotypes B compared with Q. Recombinant COE2 was expressed, purified and used for antibody construction. Polydonal antibodies specific to B. tabaci COE2 [anti-COE2 pAb and deglycosylated anti-COE2 pAb (DG anti-COE2 pAb)] revealed a 3-9-fold higher reactivity to biotype B COE2 than biotype Q COE2 by Western blot and ELISA analyses. DG anti-COE2 pAb exhibited low non-specific activity, demonstrating its compatibility in diagnosing biotypes. Western blot and ELISA analyses determined that one of the 11 field populations examined was biotype B and the others were biotype Q suggesting the saturation of biotype Q in Korea. DG anti-COE2 pAb discriminates B. tabaci biotypes B and Q with high specificity and accuracy and could be useful for the development of a B. tabaci biotype diagnosis kit for on-site field applications. (C) 2016 Elsevier Inc. All rights reserved.</P>

      • First observation of the decay B@?<sub>s</sub><sup>0</sup>→D<sup>0</sup>K<sup>@?0</sup> and a measurement of the ratio of branching fractions B(B@?<sub>s</sub><sup>0</sup>→D<sup>0</sup>K<sup>@?0</sup>)B(B@?<sup>0</sup>→D<sup>0</sup>ρ<sup>0</sup>)

        LHCb Collaboration,Aaij, R.,Abellan Beteta, C.,Adeva, B.,Adinolfi, M.,Adrover, C.,Affolder, A.,Ajaltouni, Z.,Albrecht, J.,Alessio, F.,Alexander, M.,Alkhazov, G.,Alvarez Cartelle, P.,Alves, A.A.,Amato, North-Holland Pub. Co 2011 Physics letters: B Vol.706 No.1

        The first observation of the decay B@?<SUB>s</SUB><SUP>0</SUP>→D<SUP>0</SUP>K<SUP>@?0</SUP> using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb<SUP>-1</SUP>, is reported. A signal of 34.4+/-6.8 events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The B@?<SUB>s</SUB><SUP>0</SUP>→D<SUP>0</SUP>K<SUP>@?0</SUP> branching fraction is measured relative to that of B@?<SUP>0</SUP>→D<SUP>0</SUP>ρ<SUP>0</SUP>: B(B@?<SUB>s</SUB><SUP>0</SUP>→D<SUP>0</SUP>K<SUP>@?0</SUP>)B(B@?<SUP>0</SUP>→D<SUP>0</SUP>ρ<SUP>0</SUP>)=1.48+/-0.34+/-0.15+/-0.12, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B<SUP>0</SUP> and B<SUB>s</SUB><SUP>0</SUP> hadronisation fractions.

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