Observation ofB0→pp¯K*0with a LargeK*0Polarization

Chen, J.-H.,Wang, M.-Z.,Adachi, I.,Aihara, H.,Arinstein, K.,Aulchenko, V.,Aushev, T.,Bakich, A. M.,Balagura, V.,Barberio, E.,Bay, A.,Bedny, I.,Belous, K.,Bitenc, U.,Bondar, A.,Bozek, A.,Brač,ko, American Physical Society 2008 Physical review letters Vol.100 No.25

<P>Using a 492 fb{-1} data sample collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{+}e{-} collider, we observe the decay B{0}-->ppK*0 with a branching fraction of (1.18{-0.25}{+0.29}(stat)+/-0.11(syst))x10{-6}. We study the decay dynamics of B{0}-->ppK*0 and compare with B{+}-->ppK*+. The K*0 meson is found to be almost 100% polarized (with a fraction of (101+/-13+/-3)% in the helicity zero state), while the K*+ meson has a (32+/-17+/-9)% fraction in the helicity zero state. The direct CP asymmetries for B{0}-->ppK*0 and B{+}-->ppK*+ are measured to be -0.08+/-0.20+/-0.02 and -0.01+/-0.19+/-0.02, respectively. In addition, we report improved measurements of the branching fractions B(B{+}-->ppK*+)=(3.38{-0.60}{+0.73}+/-0.39)x10{-6} and B(B{0}-->ppK{0})=(2.51{-0.29}{+0.35}+/-0.21)x10{-6}, which supersede our previous measurements.</P>

A study of γγ->K_S⁰K_S⁰ production at energies from 2.4 to 4.0 GeV at Belle

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.

Production of 5-hydroxymethylfurfural from starch-rich food waste catalyzed by sulfonated biochar

Cao, Leichang,Yu, Iris K.M.,Chen, Season S.,Tsang, Daniel C.W.,Wang, Lei,Xiong, Xinni,Zhang, Shicheng,Ok, Yong Sik,Kwon, Eilhann E.,Song, Hocheol,Poon, Chi Sun Elsevier 2018 Bioresource technology Vol.252 No.-

<P><B>Abstract</B></P> <P>Sulfonated biochar derived from forestry wood waste was employed for the catalytic conversion of starch-rich food waste (e.g., bread) into 5-hydroxymethylfurfural (HMF). Chemical and physical properties of catalyst were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area, and elemental analysis. The conversion of HMF was investigated via controlling the reaction parameters such as catalyst loading, temperature, and reaction time. Under the optimum reaction conditions the HMF yield of 30.4 Cmol% (i.e., 22 wt% of bread waste) was achieved in the mixture of dimethylsulfoxide (DMSO)/deionized-water (DIW) at 180 °C in 20 min. The effectiveness of sulfonated biochar catalyst was positively correlated to the density of strong/weak Brønsted acidity (SO<SUB>3</SUB>H, COOH, and OH groups) and inversely correlated to humins content on the surface. With regeneration process, sulfonated biochar catalyst displayed excellent recyclability for comparable HMF yield from bread waste over five cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> HMF yield of 30.4 Cmol% (∼20 wt%) from bread waste was achieved at 180 °C in 20 min. </LI> <LI> SBC loading, temperature, and reaction time controlled starch conversion route. </LI> <LI> HMF yield was in line with the total acidity density (TAD) of SBC. </LI> <LI> TAD of recovered biochar catalysts was inversely correlated with humins content. </LI> <LI> With regeneration, SBC displayed comparable performance and excellent recyclability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Mechanistic insights into red mud, blast furnace slag, or metakaolin-assisted stabilization/solidification of arsenic-contaminated sediment

Wang, Lei,Chen, Liang,Tsang, Daniel C.W.,Zhou, Yaoyu,Rinklebe, Jö,rg,Song, Hocheol,Kwon, Eilhann E.,Baek, Kitae,Sik Ok, Yong Elsevier 2019 Environment international Vol.133 No.2

<P><B>Abstract</B></P> <P>Elevated level of arsenic (As) in marine sediment via deposition and accumulation presents long-term ecological risks. This study proposed a sustainable stabilization/solidification (S/S) of As-contaminated sediment via novel valorization of red mud waste, blast furnace slag and calcined clay mineral, which were selected to mitigate the increased leaching of As under alkaline environment of S/S treatment. Quantitative X-ray diffraction and thermogravimetric analyses illustrated that stable Ca-As complexes (e.g., Ca<SUB>5</SUB>(AsO<SUB>4</SUB>)<SUB>3</SUB>OH) could be formed at the expense of Ca(OH)<SUB>2</SUB> consumption, which inevitably hindered the hydration process and S/S efficiency. The <SUP>29</SUP>Si nuclear magnetic resonance analysis revealed that incorporation of metakaolin for As immobilization resulted in a low degree of hydration and polymerization, whereas addition of red mud promoted Fe-As complexation and demonstrated excellent compatibility with As. Transmission electron microscopy and elemental mapping further confirmed the precipitation of crystalline Ca-As and amorphous Fe-As compounds. Therefore, red mud-incorporated S/S binder achieved the highest efficiency of As immobilization (99.9%), which proved to be applicable for both <I>in-situ</I> and <I>ex-situ</I> S/S of As-contaminated sediment. These results advance our mechanistic understanding for the design of green and sustainable remediation approach for effective As immobilization.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Stable Ca-As complexes could be formed at the expense of Ca(OH)<SUB>2</SUB> consumption. </LI> <LI> Metakaolin addition for S/S of As resulted in a low degree of hydration and polymerization. </LI> <LI> Incorporation of red mud promoted Fe-As complexation and improved compatibility with As. </LI> <LI> Green binders were applicable for both <I>in-situ</I> and <I>ex-situ</I> S/S of contaminated sediment. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Studies on the relationships between biochemical polymorphisms and production traits in dairy cattle

Chung, H. Y 韓國酪農學會 1996 韓國酪農學會誌 Vol.18 No.1

Characteristics of High-cell Density Cultivation of Recombinant Escherichia coli Producing RHLC Using the Fermentor Pressure Shifting Strategy

Lei Chi,Dai-Di Fan,Xiao-Xuan Ma,Yan-E Luo,Chen-Hui Zhu 한국생물공학회 2011 Biotechnology and Bioprocess Engineering Vol.16 No.3

To increase the biomass and production of recombinant human-like collagen (RHLC), the effect of controlled fermentor pressure during fed-batch cultivation was investigated using recombinant Escherichia coli producing RHLC. This study focused primarily on the effects of the fermentor pressure on the oxygen transfer capacity. A twostep exponential feeding strategy was used to control the specific growth rate at 0.2 and 0.1/h in the fed-batch and induction phase, respectively. A kinetic model of cell growth was developed, and the specific growth rate, specific glucose uptake rate, concentration of extracellular DNA, and percentage of plasmid loss were calculated and detected. The results demonstrated that increasing the fermentor pressure was an effective way of avoiding the oxygen transfer capacity limitation, and an increase in the dissolved CO2 content did not affect the growth of the recombinant E. coli BL21strain. At the end of the fermentation process, the cell density (represented by the dry cell weight, DCW) reached 77.3 g/L, and the RHLC concentration reached 14.1 g/L. In addition,the oxygen transfer capacity (KLaC^*) decreased drastically at approximately 5 h after induction. This is probably because of the increased concentration of extracellular DNA due to cell lysis, indicating that the cells needed to be harvested.

Experimental Evidence for Weak Insulator-Quantum Hall Transitions in GaN/AlGaN Two-Dimensional Electron Systems

E.S Kannan,Gil Ho Kim,D. H. Youn,Chi-Te Liang,Jing-Han Chen,Jyun-Ying Lin,Kuang Yao Chen,Kwang-Yong Kang,Li-Hung Lin,N.C. Chen,Zhi-Yao Zhang 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.6

We report comparative magnetoresistance measurements of the two-dimensional electron gas formed in two different GaN/AlGaN quantum well structures with different starting disorder. The longitudinal magnetoresistance measurements for both the samples exhibited temperature-independent crossing points, evidence for a weak insulator - quantum Hall transition. Our data suggest that the onset of Landau quantization does not correspond to the crossing point. Moreover, the effect of the electron-electron interaction must be taken into account because the Hall resistivity shows a strong temperature dependence in the more disordered sample. Our experimental results, therefore, urge further studies on the low-field weak insulator - quantum Hall transition

MY BOX REPRESENTATION FOR FAULTY CMOS CIRCUITS

Chen, Jwu E,Lee, Chung Len,Shen, Wen Zen 대한전자공학회 1989 ICVC : International Conference on VLSI and CAD Vol.1 No.1

A new logic element, My box, is proposed to model the line faults and the transistor faults for all types of CMOS circuitries. Procedures to convert a transistor level CMOS circuit into a gate level equivalent circuit with this model and to do fault collapsing for the converted circuit are also presented. The final number of representative faults obtained can be only 15 % of the original transistor faults.

Study of Ωc0 and Ωc∗0 baryons at Belle

Solovieva, E.,Chistov, R.,Adachi, I.,Aihara, H.,Arinstein, K.,Aushev, T.,Bakich, A.M.,Balagura, V.,Bitenc, U.,Bondar, A.,Brač,ko, M.,Brodzicka, J.,Browder, T.E.,Chang, P.,Chen, A.,Cheon, B.G.,Cho Elsevier 2009 Physics letters: B Vol.672 No.1

<P><B>Abstract</B></P><P>We report results from a study of the charmed double strange baryons Ωc0 and Ωc∗0 at Belle. The Ωc0 is reconstructed using the Ωc0→<SUP>Ω−</SUP><SUP>π+</SUP> decay mode, and its mass is measured to be (2693.6±0.3−1.5+1.8) MeV/<SUP>c2</SUP>. The Ωc∗0 baryon is reconstructed in the Ωc0γ mode. The mass difference <SUB>MΩc∗0</SUB>−<SUB>MΩc0</SUB> is measured to be (70.7±0.9−0.9+0.1) MeV/<SUP>c2</SUP>. The analysis is performed using 673 fb<SUP>−1</SUP> of data on and near the ϒ(4S) collected with the Belle detector at the KEKB asymmetric-energy <SUP>e+</SUP><SUP>e−</SUP> collider.</P>

日据時期韓國漢語會話書的特点 - 以體例和內容爲中心

陳明娥 ( Chen Ming-e ) 중국학연구회 2014 중국학연구 Vol.- No.70

Chinese conversation textbooks in Korea under Japanese Colonial Rule are different from those published by Translation Institute of Korea in the past. With the influence of politics, these Chinese conversation textbooks have some characteristics of mimic and times. In the view of Chinese language teaching, Chinese conversation textbooks in Korea under Japanese Colonial Rule have the following six distinct characteristics. Firstly, most of these conversation textbooks are comprehensive primary books in the view of the type. The language of these conversation textbooks is highly colloquial Beijing Mandarin. Furthermore, these textbooks are mostly quick self-study books. Secondly, some textbooks imitate the compile style of Yuyanzierji which established a mode from word to phrase, then to conversation. On the other hand, some textbooks imitate the compile style of Japanese conversation textbooks which take grammar as clue. All the conversation textbooks use the gradual, from easy to difficult compile principles. Thirdly, these conversation textbooks begin to emphasize on the language skills as well as conversational skills. Although session is still the main contents, most textbooks are integrated into the phonetics, lexicology, grammar and other linguistics knowledge. Fourth, many textbooks have set up a vocabulary module, which have some consistency in the classification quantity, content and also the order of categories. Fifth, conversation topic of these textbooks shows the teaching awareness of pragmatism which stress on conversation title and the daily life of ordinary people especially underlying public. It also reflects the new development of modern Chinese society. Sixth, these Chinese conversation textbooks are very valuable to the research of Chinese history which reflects the basic language features of Beijing Mandarin in the early republic of China. In addition to a certain country-specific features, many textbooks copy some contents of other Chinese textbooks overseas especially Japanese Mandarin textbooks in the corresponding period under the influence of political and cultural background.