科研成果

1994
Niggli E, Piston DW, Kirby MS, Cheng H, Sandison DR, Webb WW, Lederer WJ. A confocal laser scanning microscope designed for indicators with ultraviolet excitation wavelengths. American Journal of Physiology - Cell Physiology [Internet]. 1994;(1 35-1):C303-C310. 访问链接
Niggli E, Piston DW, Kirby MS, Cheng H, Sandison DR, Webb WW, Lederer WJ. A confocal laser scanning microscope designed for indicators with ultraviolet excitation wavelengths. AM.J.PHYSIOL. 1994;(1 part 1):C303-C310.
Rao Y. Conversion of a mesodermalizing molecule, the Xenopus Brachyury gene, into a neuralizing factor. Genes and Development [Internet]. 1994;(8):939-947. 访问链接
Niu Q, Wang T, Kirk WP. Deep centers as atomic-size quantum dot electron turnstiles. Superlattices and Microstructures. 1994;(4):399-401.
Kong D, Masker W. Deletion between direct repeats in T7 DNA stimulated by double-strand breaks. [Internet]. 1994;(19):5904-5911. 访问链接
谢新洲, 王益明. DIALOG的创始人──—萨米特. 情报理论与实践. 1994;(2):51-52.Abstract
DIALOG的创始人──—萨米特谢新洲,王益明(北京大学信息管理系北京)罗杰.K.萨米特(RogerK.Summit)1930年10月14日出生于美国密西根州的底特律,后移居加利福尼亚。1952年,他获得了斯坦福大学心理学文学士;5年之后,他又获得了...
Du RR, Stormer HL, Tsui DC, Yeh AS, Pfeiffer LN, West KW. Drastic enhancement of composite fermion mass near landau level filling v = 1/2. Physical Review Letters. 1994;(24):3274-3277.
Xiao R-P, Cheng H, Lederer WJ, Suzuki T, Lakatta EG. Dual regulation of Ca2+/calmodulin-dependent kinase II activity by membrane voltage and by calcium influx. Proceedings of the National Academy of Sciences of the United States of America [Internet]. 1994;(20):9659-9663. 访问链接
Xiao R-P, Cheng H, Lederer WJ, Suzuki T, Lakatta EG. Dual regulation of Ca2+/calmodulin-dependent kinase II activity by membrane voltage and by calcium influx. Proceedings of the National Academy of Sciences of the United States of America [Internet]. 1994;(20):9659-9663. 访问链接
Tang C, Feng S, Golubovic L. Dynamics and noise spectra of a driven single flux line in superconductors. Physical Review Letters. 1994;(8):1264-1267.
Wang EG, Su WP, Ting CS. Effect of the degree of disorder on electronic and optical properties in random superlattices. Journal of Applied Physics. 1994;(5):3004-3008.
Chang MC, Niu Q. Electron band structure in a two-dimensional periodic magnetic field. Physical Review B. 1994;(15):10843-10850.
Wang EG, Xu JH, Su WP, Ting CS. Electronic structures of Sb/Ga(Al)Sb (111) semimetal-semiconductor superlattices. Journal of Applied Physics. 1994;(9):5318-5326.
Wang EG, Xu JH, Su WP, Ting CS. Enhancement of optical absorption induced by disorder in three-dimensional random superlattices. Applied Physics Letters. 1994;(4):443-445.
Lee K-J, McCormick WD, Ouyang Q, Swinney HL. Erratum: Ferricyanide and pattern formation (Science (1994) (192-194)). Science. 1994;(5177):1348-.
Li QP, Xie XC. Erratum: Transport of one-dimensional interacting fermions through a barrier (Physical Review B (1994) 50, 7 (5021)). Physical Review B. 1994;(7):5021-.
Li SM, Anlauf KG, Wiebe HA, Bottenheim JW. ESTIMATING PRIMARY AND SECONDARY PRODUCTION OF HCHO IN EASTERN NORTH-AMERICA BASED ON GAS-PHASE MEASUREMENTS AND PRINCIPAL COMPONENT ANALYSIS. GEOPHYSICAL RESEARCH LETTERS. 1994;21:669-672.Abstract
Based on atmospheric measurements of multiple species at Egbert, a rural site in Ontario, Canada, during summer 1988, the emission ratios of HCHO/CO and HCHO/SIGMANO(y) for area sources and secondary production of HCHO have been estimated using a modified principal component analysis technique. The technique yields three principal components that represent a photochemically aged air mass, a diurnal cycle, and fresh area emissions. The area emission component has an emission ratio CO/SIGMANO(y) = 9 +/- 3 and SO2/CO = 0.005 +/- 0.003, in agreement with NAPAP area emission data for the eastern US [Buhr et al., 1992]. The emission ratios of HCHO/CO and HCHO/SIGMANO(y) in this component are 0.0056 +/- 0.0022 and 0.05 +/- 0.007, respectively. If these ratios are typical of eastern North American area emissions, the total primary HCHO emission for this region will be 8 x 10(9) moles HCHO annually based on the NAPAP CO emission inventories. Evidence of secondary HCHO production can be found in the photochemically aged component which has considerably higher HCHO/CO (0.016 +/- 0.004) and HCHO/SIGMANO(y) (0.29 +/- 0.03) ratios than the emission ratios. It is estimated that for every 1 ppb NO(x) converted to NO(y), 0.4 ppb HCHO are produced for the ratio (1-NO(x)/NO(y))<0.6; after which the relative HCHO production rate becomes smaller. Using this relative rate, the maximum total HCHO production over the eastern North America is estimated to be 1.3 x 10(11) moles year-1, or approximately 16 times that from primary emission.
Li SM, Anlauf KG, Wiebe HA, Bottenheim JW, PUCKETT KJ. EVALUATION OF A COMPREHENSIVE EULERIAN AIR-QUALITY MODEL WITH MULTIPLE CHEMICAL-SPECIES MEASUREMENTS USING PRINCIPAL COMPONENT ANALYSIS. ATMOSPHERIC ENVIRONMENT. 1994;28:3449-3461.Abstract
Using a principal component analysis technique and data on atmospheric gases and aerosols at a rural site in Ontario, Canada from the Eulerian model evaluation field study (EMEFS), the Eulerian acid deposition and oxidant model (ADOM) is evaluated. Seventy-nine and 76% of the variances in the data and model output, respectively, are explained by three principal components. They are a chemically aged/transported component, a diurnal cycle component, and an area emission component, all characterized by their ratios of gases and temporal variation patterns. The ADOM component contributions to sulphur species are in general agreement with the EMEFS components, but with notable differences for key photochemical species including O-3. The temporal variations of the ADOM components are close to those of the EMEFS components. The EMEFS chemically aged/transported component shows a high degree of photochemical processing, with the ratios [NOx]/[TNOy]=0.3 and [O-3]/([TNOy]-[NOx])=9+/-1. The corresponding ADOM component predicts lower [NOx]/[TNOy] and [O-3]/([TNOy]-[NOx]) ratios, probably caused by a chemical mechanism in the model that is too fast, and lower contributions to O-3, NO2, TNO3, PAN, TNOy, and HCHO, probably caused by model grid dilution or lower model emissions. The EMEFS diurnal component owes its variance to the daily photochemistry and nighttime dry deposition of the chemical species. In comparison, the matching ADOM component underpredicts the ratio [O-3]/([TNOy]-[NOx]) and the NO2 consumption and O-3 production but overpredicts the contributions to the other species. The EMEFS emission component represents emissions from local/regional area sources. The corresponding ADOM component underpredicts TNOy by 44% and the fraction of TNOy as NOx compared to the EMEFS component, suggesting that the model has lower emissions of NOx and a photochemical mechanism that converts NOx faster than indicated by the EMEFS results.
Du RR, Tsui DC, Stormer HL, Pfeiffer LN, West KW. Experimental evidence for composite particles in the fractional quantum Hall effect. Surface Science. 1994;(1-3):18-22.
Xie XC, Sarma DS, Song H. FIR spectroscopy of the intra-Landau level excitations of strongly correlated quantum dots. Surface Science. 1994;(1-3):606-609.

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