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Belle Collaboration,Chen, W.T.,Abe, K.,Abe, K.,Adachi, I.,Aihara, H.,Anipko, D.,Aulchenko, V.,Bakich, A.M.,Barberio, E.,Bay, A.,Bedny, I.,Bitenc, U.,Bizjak, I.,Blyth, S.,Bondar, A.,Bozek, A.,Bracko, M North-Holland Pub. Co 2007 Physics letters: B Vol.651 No.1
K<SUB>S</SUB><SUP>0</SUP>K<SUB>S</SUB><SUP>0</SUP> production in two-photon collisions has been studied using a 397.6 fb<SUP>-1</SUP> data sample collected with the Belle detector at the KEKB e<SUP>+</SUP>e<SUP>-</SUP> collider. For the first time the cross sections are measured in the two-photon center-of-mass energy range between 2.4 GeV and 4.0 GeV and angular range |cosθ<SUP>*</SUP>|<0.6. Combining the results with measurements of γγ->K<SUP>+</SUP>K<SUP>-</SUP> from Belle, we observe that the cross section ratio σ(K<SUB>S</SUB><SUP>0</SUP>K<SUB>S</SUB><SUP>0</SUP>)/σ(K<SUP>+</SUP>K<SUP>-</SUP>) decreases from ∼0.13 to ∼0.01 with increasing energy. Signals for the χ<SUB>c0</SUB> and χ<SUB>c2</SUB> charmonium states are also observed.
Bineesh, K.V.,Kim, M.i.,Lee, G.H.,Selvaraj, M.,Hyun, K.,Park, D.W. Korean Society of Industrial and Engineering Chemi 2012 Journal of industrial and engineering chemistry Vol.18 No.5
The catalytic oxidation of hydrogen sulfide in the presence of water and ammonia was studied over V<SUB>2</SUB>O<SUB>5</SUB> supported on Zr-pillared clay catalysts (V/Zr-PILCs). The synthesized catalysts were examined using a variety of characterization techniques. A catalytic performance study using V/Zr-PILC catalysts showed that H<SUB>2</SUB>S was successfully converted to elemental sulfur and ammonium thiosulfate (ATS) without considerable emission of sulfur dioxide. The H<SUB>2</SUB>S conversion over V/Zr-PILCs increased with increasing the content of vanadia up to 6wt.%. This superior catalytic performance might be related to the uniform dispersion of vanadia species on the Zr-PILC support.
Inclusive and exclusive measurements ofBdecays toχc1andχc2at Belle
Bhardwaj, V.,Miyabayashi, K.,Panzenbö,ck, E.,Trabelsi, K.,Frey, A.,Abdesselam, A.,Adachi, I.,Aihara, H.,Al Said, S.,Arinstein, K.,Asner, D. M.,Atmacan, H.,Aulchenko, V.,Aushev, T.,Ayad, R.,Babu, V American Physical Society 2016 Physical Review D Vol.93 No.5
<P>We report inclusive and exclusive measurements for chi(c1) and chi(c2) production in B decays. We measure B(B -> chi X-c1) = (3.03 +/- 0.05 (stat) +/- 0.24(syst)) x 10(-3) and B(B -> chi X-c2) = (0.70 +/- 0.06 (stat) +/- 0.10(syst)) x 10(-3). For the first time, chi(c2) production in exclusive B decays in the modes B-0 -> chi(c2) pi K--(+) and B-0 -> chi(c2) pi(-)pi K-+(+) has been observed, along with first evidence for the B-0 -> chi(c2) pi K--(s)0 decay mode. For chi c1 production, we report the first observation in the B+ -> chi(c1) pi(-)pi K-+(+), B-0 -> chi(c1) pi(-)pi K-+(s)0 and B-0 -> chi(c1) pi(-)pi K-+(+) decay modes. Using these decay modes, we observe a difference in the production mechanism of chi(c2) in comparison to chi(c1) in B decays. In addition, we report searches for X(3872) and chi(c1) (2P) in the B+ -> (chi(c1) pi(+)pi(-))K+ decay mode. The reported results use 772 x 10(6) B (B) over bar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.</P>
Nguyen, T.H.,Than, V.T.,Thanh, H.D.,Nguyen, V.Q.,Nguyen, K.H.,Nguyen, D.T.,Park, J.H.,Chung, I.S.,Jeong, D.G.,Chang, K.T.,Oh, T.K.,Kim, W. Pergamon Press 2015 Comparative immunology, microbiology and infectiou Vol.42 No.-
In Vietnam, highly pathogenic avian influenza (HPAI), such as that caused by H5N1 viruses, is the most highly contagious infectious disease that has been affecting domestic poultry in recent years. Vietnam might be an evolutionary hotspot and a potential source of globally pandemic strains. However, few studies have reported viruses circulating in the south-central region of Vietnam. In the present study, 47 H5N1-positive samples were collected from both vaccinated and unvaccinated poultry farms in the South Central Coast region of Vietnam during 2013-2014, and their genetic diversity was analyzed. A common sequence motif for HPAI virus was identified at HA-cleavage sites in all samples: either RERRRKR/G (clades 2.3.2.1c and 2.3.2.1a) or REGRRKKR/G (clade 1.1.2). Phylogenetic analysis of HA genes identified three clades of HPAI H5N1: 1.1.2 (n=1), 2.3.2.1a (n=1), and 2.3.2.1c (n=45). The phylogenetic analysis indicated that these Vietnamese clades may have evolved from Chinese and Cambodian virus clades isolated in 2012-2013 but are less closely related to the clades detected from the Tyva Republic, Bulgaria, Mongolia, Japan, and Korea in 2009-2011. Detection of the coexistence of virus clades 2.3.2.1 and the very virulent 1.1.2 in the south-central regions suggests their local importance and highlights concerns regarding their spread, both northwards and southwards, as well as the potential for reassortment. The obtained data highlight the importance of regular identification of viral evolution and the development and use of region-specific vaccines.
Van Oss, S. Branden,Shirra, Margaret K.,Bataille, Alain R.,Wier, Adam D.,Yen, Kuangyu,Vinayachandran, Vinesh,Byeon, In-Ja L.,Cucinotta, Christine E.,Hé,roux, Annie,Jeon, Jongcheol,Kim, Jaehoon,V Elsevier 2016 Molecular cell Vol.64 No.4
<P><B>Summary</B></P> <P>The five-subunit yeast Paf1 complex (Paf1C) regulates all stages of transcription and is critical for the monoubiquitylation of histone H2B (H2Bub), a modification that broadly influences chromatin structure and eukaryotic transcription. Here, we show that the histone modification domain (HMD) of Paf1C subunit Rtf1 directly interacts with the ubiquitin conjugase Rad6 and stimulates H2Bub independently of transcription. We present the crystal structure of the Rtf1 HMD and use site-specific, in vivo crosslinking to identify a conserved Rad6 interaction surface. Utilizing ChIP-exo analysis, we define the localization patterns of the H2Bub machinery at high resolution and demonstrate the importance of Paf1C in targeting the Rtf1 HMD, and thereby H2Bub, to its appropriate genomic locations. Finally, we observe HMD-dependent stimulation of H2Bub in a transcription-free, reconstituted in vitro system. Taken together, our results argue for an active role for Paf1C in promoting H2Bub and ensuring its proper localization in vivo.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Histone modification domain (HMD) of Rtf1 directly contacts Rad6 in vivo </LI> <LI> HMD structure and in vivo crosslinking identify a conserved Rad6 interaction surface </LI> <LI> Paf1C regulates global H2B ubiquitylation (ub) patterns by linking HMD to Pol II </LI> <LI> HMD stimulates Bre1-dependent H2Bub in a transcription-free, reconstituted assay </LI> </UL> </P> <P><B>Graphical Abstract</B></P> <P>[DISPLAY OMISSION]</P>
Enhancement in hydrogen production by co-cultures of Bacillus and Enterobacter
Patel, S.K.S.,Kumar, P.,Mehariya, S.,Purohit, H.J.,Lee, J.K.,Kalia, V.C. Pergamon Press ; Elsevier Science Ltd 2014 International journal of hydrogen energy Vol.39 No.27
Defined co-cultures of hydrogen (H<SUB>2</SUB>) producers belonging to Citrobacter, Enterobacter, Klebsiella and Bacillus were used for enhancing the efficiency of biological H<SUB>2</SUB> production. Out of 11 co-cultures consisting of 2-4 strains, two co-cultures composed of Bacillus cereus EGU43, Enterobacter cloacae HPC123, and Klebsiella sp. HPC793 resulted in H<SUB>2</SUB> yield up to 3.0 mol mol<SUP>-1</SUP> of glucose. Up-scaling of the reactor by 16-fold resulted in a corresponding increase in H<SUB>2</SUB> production with an actual evolution of 7.44 L of H<SUB>2</SUB>. It constituted 58.2% of the total biogas. Continuous culture evolution of H<SUB>2</SUB> by co-cultures (B. cereus EGU43 and E. cloacae HPC123) immobilized on ligno-cellulosic materials resulted in 6.4-fold improvement in H<SUB>2</SUB> yield compared to free floating bacteria. This synergistic influence of B. cereus and E. cloacae can offer a better strategy for H<SUB>2</SUB> production than undefined or mixed cultures.
Miyazaki, Y.,Aihara, H.,Arinstein, K.,Aulchenko, V.,Aushev, T.,Bakich, A.M.,Balagura, V.,Barberio, E.,Bay, A.,Belous, K.,Bhardwaj, V.,Bischofberger, M.,Bondar, A.,Brač,ko, M.,Browder, T.E.,Chang, North-Holland Pub. Co 2010 Physics letters. Section B Vol.682 No.4
<P><B>Abstract</B></P><P>We search for lepton flavor and lepton number violating <I>τ</I> decays into a lepton (ℓ=electron or muon) and two charged mesons (h,<SUP>h′</SUP>=<SUP>π±</SUP> or <SUP>K±</SUP>), <SUP>τ−</SUP>→<SUP>ℓ−</SUP><SUP>h+</SUP><SUP>h′−</SUP> and <SUP>τ−</SUP>→<SUP>ℓ+</SUP><SUP>h−</SUP><SUP>h′−</SUP>, using 671 fb<SUP>−1</SUP> of data collected with the Belle detector at the KEKB asymmetric-energy <SUP>e+</SUP><SUP>e−</SUP> collider. We obtain 90% C.L. upper limits on the branching fractions in the range (4.4–8.8)×<SUP>10−8</SUP> for τ→eh<SUP>h′</SUP>, and (3.3–16)×<SUP>10−8</SUP> for τ→μh<SUP>h′</SUP> processes. These results improve upon previously published upper limits by factors between 1.6 to 8.8.</P>
Hernandez, J.M.,Lim, D.H.,Nguyen, H.V.P.,Yoon, S.P.,Han, J.,Nam, S.W.,Yoon, C.W.,Kim, S.K.,Ham, H.C. Pergamon Press ; Elsevier Science Ltd 2014 International journal of hydrogen energy Vol.39 No.23
Spin-polarized density functional theory studies of hydrogen sulfide (H<SUB>2</SUB>S) adsorption and decomposition on Ni(100) and Ni<SUB>3</SUB>Al(100) surfaces were conducted to understand the aluminum (Al) alloying effect on H<SUB>2</SUB>S dissociation. For such purpose, we first determined the near surface structure of fully ordered Ni<SUB>3</SUB>Al alloy along the [100] direction by calculating the Al segregation energy to the surface and then examined the adsorption energies of the adsorbates (H<SUB>2</SUB>S, HS, S, and H) and the activation barriers for the H<SUB>2</SUB>S and HS decomposition by using Climbing Image-Nudged Elastic Band method. We found that regardless of the way to terminate the surface, Al atom in bimetallic Ni<SUB>3</SUB>Al(100) tends to exist in the first surface layer, rather than in the second or third layer, and the Ni<SUB>3</SUB>Al(100) surface can substantially retard the H<SUB>2</SUB>S decomposition by reducing the adsorption energy of sulfur compounds compared to the pure Ni(100) case. Finally, we presented how the Al in Ni<SUB>3</SUB>Al modifies the activity of surface Ni atoms toward the sulfur compounds by calculating the local density of states and charge distribution in alloying components. This work hints the importance of knowing how to properly tailor the reactivity of Ni based materials to enhance the resistance for sulfur poisoning.
Seo, I.-T.,Park, H.-Y.,Dung, N.V.,Choi, M.-K.,Nahm, S.,Lee, H.-G.,Choi, B.-H. IEEE 2009 and Frequency Control Vol.56 No.11
<P>Various amounts of Nb<SUB>2</SUB>O<SUB>5</SUB> in the (Na<SUB>0.5</SUB>K<SUB>0.5</SUB>) NbO<SUB>3</SUB> (NKN) ceramic were replaced by V<SUB>2</SUB>O<SUB>5</SUB> to decrease its sintering temperature to below 950°C. A small V<SUB>2</SUB>O<SUB>5</SUB> content resulted in a dense microstructure with an increased grain size for the specimen sintered at 900°C due to the presence of a liquid phase. When V<SUB>2</SUB>O<SUB>5</SUB> was added to the NKN ceramics, their orthorhombic-to-tetragonal transition temperature increased from 178°C to around 200°C. However, their Curie temperature decreased from 402°C to around 330°C. The k<SUB>p</SUB>, <SUB>ε3</SUB> <SUP>T</SUP>/<SUB>ε0</SUB>, and Q<SUB>m</SUB> values increased with V<SUB>2</SUB>O<SUB>5</SUB> addition, probably due to the increased density and poling state, which was identified by the phase angle. The specimen with x = 0.05, sintered at 900°C for 8 h, exhibited the following piezoelectric properties: k<SUB>p</SUB> = 0.32, <SUB>ε3</SUB> <SUP>T</SUP>/<SUB>ε0</SUB> = 245, d<SUB>33</SUB> = 120 (pC/N), and Q<SUB>m</SUB> = 232.</P>