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Characteristics and composition of atmospheric aerosols in Phimai, central Thailand during BASE-ASIA
Li, C.,Tsay, S.C.,Hsu, N.C.,Kim, J.Y.,Howell, S.G.,Huebert, B.J.,Ji, Q.,Jeong, M.J.,Wang, S.H.,Hansell, R.A.,Bell, S.W. Pergamon Press ; Elsevier [distribution] 2013 Atmospheric environment Vol.78 No.-
Comprehensive measurements of atmospheric aerosols were made in Phimai, central Thailand (15.183<SUP>o</SUP>N, 102.565<SUP>o</SUP>E, elevation: 206 m) during the BASE-ASIA field experiment from late February to early May in 2006. The observed aerosol loading was sizable for this rural site (mean aerosol scattering: 108 +/- 64 Mm<SUP>-1</SUP>; absorption: 15 +/- 8 Mm<SUP>-1</SUP>; PM<SUB>10</SUB> concentration: 33 +/- 17 μg m<SUP>-3</SUP>), and dominated by submicron particles. Major aerosol compounds included carbonaceous (OC: 9.5 +/- 3.6 μg m<SUP>-3</SUP>; EC: 2.0 +/- 2.3 μg m<SUP>-3</SUP>) and secondary species (SO<SUB>4</SUB><SUP>2-</SUP>: 6.4 +/- 3.7 μg m<SUP>-3</SUP>, NH<SUB>4</SUB><SUP>+</SUP>: 2.2 +/- 1.3 μg m<SUP>-3</SUP>). While the site was seldom under the direct influence of large forest fires to its north, agricultural fires were ubiquitous during the experiment, as suggested by the substantial concentration of K<SUP>+</SUP> (0.56 +/- 0.33 μg m<SUP>-3</SUP>). Besides biomass burning, aerosols in Phimai during the experiment were also strongly influenced by industrial and vehicular emissions from the Bangkok metropolitan region and long-range transport from southern China. High humidity played an important role in determining the aerosol composition and properties in the region. Sulfate was primarily formed via aqueous phase reactions, and hygroscopic growth could enhance the aerosol light scattering by up to 60%, at the typical morning RH level of 85%. The aerosol single scattering albedo demonstrated distinct diurnal variation, ranging from 0.86 +/- 0.04 in the evening to 0.92 +/- 0.02 in the morning. This experiment marks the first time such comprehensive characterization of aerosols was made for rural central Thailand. Our results indicate that aerosol pollution has developed into a regional problem for northern Indochina, and may become more severe as the region's population and economy continue to grow.
Measurement of branching fraction and direct CP asymmetry in charmless B+→K+K−π+ decays at Belle
Hsu, C.-L.,Dossett, D.,Sevior, M. E.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Atmacan, H.,Aulchenko, V.,Aushev, T.,Ayad, R.,Badhrees, I.,Bakich, A. M.,Barberio, E.,Behera, P.,Berger, M.,Bhardwaj American Physical Society 2017 Physical Review D Vol.96 No.3
<P>We report a study of the charmless hadronic decay of the charged B meson to the three-body final state K+K-pi(+). The results are based on a data sample that contains 772 x 10(6) B (B) over bar pairs collected at the Y (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured inclusive branching fraction and direct CP asymmetry are (5.38 +/- 0.40 +/- 0.35) x 10(-6) and -0.170 +/- 0.073 +/- 0.017, respectively, where the first uncertainties are statistical and the second are systematic. The K+K- invariant mass distribution of the signal candidates shows an excess in the region below 1.5 GeV/c(2), which is consistent with the previous studies from BABAR and LHCb. In addition, strong evidence of a large direct CP asymmetry is found in the low K+K- invariant-mass region.</P>
Optical Characterization of Zn0.95-xBe0.05MnxSe Mixed Crystals
H. P. Hsu,T. W. Chang,Y. S. Huang,F. Firszt,S. Legowski,H. Meczynsk,A. Marasek,K. Strza lkowski,K. K. Tiong,M. Munoz 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.1
Temperature-dependent photoluminescence (PL), contactless electrore ectance (CER) and surface photovoltage spectroscopy (SPS) characterizations of two Zn0.95-xBe0.05MnxSe mixed crystals with Mn contents x=0.05 and 0.20 grown by using the modified high-pressure Bridgman method has been carried out in the temperature range of 15-300 K. A typical PL spectrum at low temperature consists of a free exciton line, an edge emission due to recombenation of shallow donor-acceptor pairs and Mn2+-related intra-ionnic emissions. Te near band edge transition energies are determined lines in the PL spectra correspond quite well to the energies of the fundamental trasitions determinde from CER and SPS data. The parameters that descrbe the temperature dependence of the trasition energy of the fundamental band-edge excton are evaluated and discussed. Temperature-dependent photoluminescence (PL), contactless electrore ectance (CER) and surface photovoltage spectroscopy (SPS) characterizations of two Zn0.95-xBe0.05MnxSe mixed crystals with Mn contents x=0.05 and 0.20 grown by using the modified high-pressure Bridgman method has been carried out in the temperature range of 15-300 K. A typical PL spectrum at low temperature consists of a free exciton line, an edge emission due to recombenation of shallow donor-acceptor pairs and Mn2+-related intra-ionnic emissions. Te near band edge transition energies are determined lines in the PL spectra correspond quite well to the energies of the fundamental trasitions determinde from CER and SPS data. The parameters that descrbe the temperature dependence of the trasition energy of the fundamental band-edge excton are evaluated and discussed.
Isolation and Characterization of Microsatellite Markers in Tsaiya Duck
Hsiao, M.C.,Liu, H.C.,Hsu, Y.C.,Hu, Y.H.,Li, S.H.,Lee, S.R. Asian Australasian Association of Animal Productio 2008 Animal Bioscience Vol.21 No.5
An enrichment library of GATA-repeats from genomic DNA was constructed in this study to isolate and characterize microsatellite loci in Tsaiya duck (Anas platyrhynchos). Thirty-three microsatellite markers were developed and used to detect polymorphisms in 30 Tsaiya ducks. A total of 177 alleles were observed and all loci except APT022 were polymorphic. The number of alleles ranged from 2 to 9 with an average of 5.5 per microsatellite locus. The observed and expected heterozygosity of these polymorphic markers ranged from 0.07 to 0.93 with an average number of 0.60 and 0.10 to 0.86 with an average number of 0.61, respectively. Among the polymorphic markers, the observed heterozygosities of 23 loci were higher than 0.50 (69.70%). The polymorphism information content (PIC) in the 32 loci ranged from 0.09 to 0.83 with an average of 0.57. Seven of the 33 duck microsatellite loci had orthologs in the chicken genome, but only APT004 had a similar core repeat to chickens. These microsatellite markers will be useful in constructing a genetic linkage map for the duck and a comparative mapping with the chicken can also provide a valuable tool for studies related to biodiversity and population genetics in this duck species.
Cross-Coupled Narrow-Band YBCO Filters with Spurious Suppression by Using a Tap-Connection Technique
L. M. Wang,Chung-I G. Hsu,D. S. Hsieh,L. H. Chen,M. L. Chu,S. M. Chiou 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.5I
Narrow-band microstrip cross-coupled band-pass filters based on a quadruplet geometry were designed for wireless-communication applications. High-Tc superconducting (HTS) filters were fabricated by patterning YBa2Cu3Oy (YBCO) films double-side deposited on 20-mm-square and 0.5- mm-thick LaAlO3 substrates. The filters with skew-symmetric feed were designed with a center frequency at 1.9 GHz and a bandwidth of 20 MHz. The inductive coupling between the non-adjacent resonators produced a pair of transmission zeros in the frequency response. Also observed was an additional pair of transmission zeros that enhance the out-of-band rejection characteristics. The realized YBCO filter showed a center frequency at 1.925 GHz with a bandwidth of 20 MHz and a minimum insertion loss of about 0.74 dB. Furthermore, a tap-connection technique was applied to cross-coupled HTS band-pass filters so as to suppress the second and/or the third passbands, which were spurious and undesirable. To improve the out-of-band performance of the band-pass filters, we tapped the input/output microstrip lines at certain locations. In this research, we confirmed that by tapping somewhere along the input/output microstrip lines, a /4 open stub or a /2 short stub, where refers to the guided wavelength at 2fo or 3fo, may effectively suppress harmonics at 2fo and/or 3fo by more than 25 dB. The simulated and the experimental results are discussed.
Effect of chronic lead intoxication on the distribution and elimination of amoxicillin in goats
Ahmed M. Soliman,Ehab A. Abu-Basha,Salah A. H. Youssef,Aziza M. Amer,Patricia A. Murphy,Catherine C. Hauck,Ronette Gehring,Walter H. Hsu 대한수의학회 2013 Journal of Veterinary Science Vol.14 No.4
A study of amoxicillin pharmacokinetics was conducted in healthy goats and goats with chronic lead intoxication. The intoxicated goats had increased serum concentrations of liver enzymes (alanine aminotransferase and γ-glutamyl transferase),blood urea nitrogen, and reactivated δ-aminolevulinic acid dehydratase compared to the controls. Following intravenous amoxicillin (10 mg/kg bw) in control and lead-intoxicated goats,elimination half-lives were 4.14 and 1.26 h, respectively. The volumes of distribution based on the terminal phase were 1.19and 0.38 L/kg, respectively, and those at steady-state were 0.54and 0.18 L/kg, respectively. After intramuscular (IM)amoxicillin (10 mg/kg bw) in lead-intoxicated goats and control animals, the absorption, distribution, and elimination of the drug were more rapid in lead-intoxicated goats than the controls. Peak serum concentrations of 21.89 and 12.19 μg/mL were achieved at 1 h and 2 h, respectively, in lead-intoxicated and control goats. Amoxicillin bioavailability in the lead-intoxicated goats decreased 20% compared to the controls. After amoxicillin, more of the drug was excreted in the urine from lead-intoxicated goats than the controls. Our results suggested that lead intoxication in goats increases the rate of amoxicillin absorption after IM administration and distribution and elimination. Thus, lead intoxication may impair the therapeutic effectiveness of amoxicillin.