136,879 research outputs found
Note on the generalization of the global embedding Minkowski spacetime approach
No full textThis paper is a supplement of our earlier work [H.-Z. Chen, Y. Tian, Y.-H. Gao, and X.-C. Song, J. High Energy Phys. 10 (2004) 011.]. We map the vector potential of charged black holes into GEMS and find that its effect on the thermal spectrum is the same as that on the black hole side, i.e., it will induce a chemical potential in the thermal spectrum which is the same as that in the charged black holes. We also argue that the generalization of GEMS approach to nonstationary motions is not possible.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)0ARTICLE10null7
INNOVATIVE PILLAR[6]ARENE-BASED STATIONARY PHASES FOR HIGH-RESOLUTION GAS CHROMATOGRAPHIC ANALYSES
No full textIn this work, the synthesis, fabrication, and characterization of new stationary phases based on pillar[6]arene derivative modified by long alkyl chains (P6A-C10) for high-resolution gas chromatographic (GC) analyses are reported. Pillar[n]arenes are a new class of macrocyclic hosts that can accommodate specific guests due to their highly symmetrical and rigid pillar architectures with π-electron rich cavities. Quantum chemistry calculations have been performed, showing a difference in non-covalent interactions with the P6A-C10 pillar framework, which leads to specific selectivity for aromatic compounds. The GC columns prepared with these innovative stationary phases exhibited a medium polarity, and good reproducibility for run-to-run, day-to-day, and column-to-column analyses [1], demonstrating great potential as new stationary phases in separation science. Furthermore, peculiar advantages are achieved if compared with the commercial HP-5, HP-35, DB-17, and PEG-20M columns, showing unmatched resolving capabilities toward chloroaniline, bromoaniline, iodoaniline, toluidine, and xylene isomers [2].
References:
1. Sun, T., Chen, R., Huang, Q., Ba, M., Cai, Z., Hu, S., Liu, X., Nardiello, D., & Quinto, M., ACS Appl. Mater. Interfaces 14 (2022) 56132−56142.
2. Sun, T., Chen, R., Huang, Q., Ba, M., Cai, Z., Chen, H., Qi, Y., Chen, H., Liu, X., Nardiello, D., & Quinto, M., Anal. Chim. Acta 1251 (2023) 340979
Purification and Characterization of High Specificity β-D-Glucosidase from Euphausia Superba
No full text
Comparison of High Frequency Magnetic Core Losses Under Two Different Driving Conditions- Sinusoidal Voltage and Square-Wave Voltage
No full textCharged bottomoniumlike states Z(b)(10610) and Z(b)(10650) and the Y(5S) -> Y(2S)pi(+)pi(-) decay
No full textInspired by the newly observed two charged bottomoniumlike states, we consider the possible contribution from the intermediate Z(b)(10610) and Z(b)(10650) states to the Y(5S) -> Y(2S)pi(+)pi(-) decay process, which naturally explains Belle's previous observation of the anomalous Y(2S)pi(+)pi(-) production near the peak of Y(5S) at root s = 10: 87 GeV [K. F. Chen et al. (Belle Collaboration), Phys. Rev. Lett. 100, 112001 (2008)]. The resulting d Gamma(Y(5S) -> Y(2S)pi(+)pi(-))/dm(pi+pi-) and d Gamma(Y(5S) -> Y(2S)pi(+)pi(-))/dcos theta distributions agree with Belle's measurement after inclusion of these Z(b) states. This formalism also reproduces the Belle observation of the double-peak structure and its reflection in the Y(2S)pi(+) invariant mass spectrum of the Y(5S) -> Y(2S)pi(+)pi(-) decay.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)0ARTICLE7null8
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
Full text linkBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
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