Nuclear magnetic resonance measurements and the energy band structure of PtSn

Nuclear magnetic resonance measurements of the Knight shift and spin-lattice relaxation time for ¹⁹⁵Pt and ¹¹⁹Sn in PtSn are reported. The energy band structure as determined by the relativistic orthogonalized plane wave method is also presented. The band model developed has holes in the Pt d-band but does not have a large density of states associated therewith.     

Luminol-dependent chemiluminescence analysis of cellular and humoral defects of phagocytosis using a chem-glo photometer

In summary, this report describes the conditions under which luminol has been utilized to measure phagocytosis-associated metabolic events in activated human PMNs and rabbit and dog alveolar macrophages. We feel that this system may have wide applicability to both clinical and experimental situations. Some possible applications are shown in the following table.

Potential Applications of Luminol-Amplified Chemiluminescence

     

73.

The Characterization of Molecular Alkali‐Metal Azides.     

J. Steven Ogden  John M. Dyke  William Levason  Francesco Ferrante  Laura Gagliardi 《ChemInform》2006,37(27):no-no

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.     

74.

Wave packet interferometry and quantum state reconstruction by acousto-optic phase modulation     

Tekavec PF  Dyke TR  Marcus AH 《The Journal of chemical physics》2006,125(19):194303

Studies of wave packet dynamics often involve phase-selective measurements of coherent optical signals generated from sequences of ultrashort laser pulses. In wave packet interferometry (WPI), the separation between the temporal envelopes of the pulses must be precisely monitored or maintained. Here we introduce a new (and easy to implement) experimental scheme for phase-selective measurements that combines acousto-optic phase modulation with ultrashort laser excitation to produce an intensity-modulated fluorescence signal. Synchronous detection, with respect to an appropriately constructed reference, allows the signal to be simultaneously measured at two phases differing by 90 degrees. Our method effectively decouples the relative temporal phase from the pulse envelopes of a collinear train of optical pulse pairs. We thus achieve a robust and high signal-to-noise scheme for WPI applications, such as quantum state reconstruction and electronic spectroscopy. The validity of the method is demonstrated, and state reconstruction is performed, on a model quantum system--atomic Rb vapor. Moreover, we show that our measurements recover the correct separation between the absorptive and dispersive contributions to the system susceptibility.     

75.

Enhanced leading production of D+/- and D*+/- in 250 GeV pi +/--nucleon interactions     

Alves GA  Amato S  Anjos JC  Appel JA  Astorga J  Bernard T  Bracker SB  Cremaldi LM  Darling CL  Dixon RL  Errede D  Gay C  Green DR  Jedicke R  Karchin PE  Kwan S  Lueking LJ  de Mello Neto JR  Metheny J  Milburn RH  de Miranda JM  da Motta Filho H  Napier A  Passmore D  Rafatian A  dos Reis AC  Ross WR  Santoro AF  Sheaff M  Souza MH  Spalding WJ  Stoughton C  Streetman ME  Summers DJ  Takach SF  Wallace A  Wu Z 《Physical review letters》1994,72(6):812-815

     

76.

Quenching of magnetic moments by ligand-metal interactions in nanosized magnetic metal clusters     

van Leeuwen DA  van Ruitenbeek JM  de Jongh LJ  Ceriotti A  Pacchioni G  Häberlen OD  Rösch N 《Physical review letters》1994,73(10):1432-1435

     

77.

Comment on "Quantized conductance in an atom-sized point contact"     

Krans JM  Muller CJ  van der Post N  Postma FR  Sutton AP  Todorov TN  van Ruitenbeek JM 《Physical review letters》1995,74(11):2146

     

78.

Quantitative predictions of linear viscoelastic rheological properties of entangled polymers     

Cattaleeya Pattamaprom  Ronald G. Larson  Timothy J. Van Dyke 《Rheologica Acta》2000,39(6):517-531

The “dual constraint” model developed by Mead, Van Dyke et al. is here extended by inclusion of “early-time” contour-length fluctuations and constraint-release Rouse relaxation, and then evaluated by comparing its predictions with literature data for over 50 different linear and star polymers. By combining the reptation model of Doi and Edwards with contour-length fluctuations and constraint release, the model provides a systematic approach to prediction of the rheological properties of polymers. The parameters are taken from the literature and used consistently for linear polymers, star polymers, and their mixtures having the same chemical compositions. In most cases, the predictions of the model appears to agree well with data for monodisperse, bidisperse, and polydisperse linear and star polymers, except at low molecular weights. Received: 23 December 1999 Accepted: 28 March 2000     

79.

Modeling of Highly Branched Water‐Soluble Polymers with Applications to Drug Delivery Model Extensions and Validation          下载免费PDF全文

Seung Yeon Kim  Robert Van Dyke  Kai Chang  Lakeshia J. Taite  Francis Joseph Schork 《大分子反应工程》2015,9(6):545-555

     

80.

Laser-induced fluorescence and microwave-optical double-resonance study of the B¹Σ⁺-X¹Σ⁺ system of magnesium monoxide     

Yoshiro Azuma  Thomas R. Dyke  Gretchen K. Gerke  Timothy C. Steimle 《Journal of Molecular Spectroscopy》1984,108(1):137-142

Doppler-limited, laser-induced fluorescence spectra on the B¹Σ⁺-X¹Σ⁺ (v′ = v″ = 0 and 1) system of MgO have been obtained. The results of the optical analysis were merged with our microwave-optical double-resonance measurements to produce the following set of spectroscopic parameters for the B and X states, where the units are in cm^?1, and the uncertainties represent 95% confidence limits: T′_0.0 = 20003.594(2); B′₀ = 0.58004(3); D′₀ = 1.13(2) × 10^?6; B″₀ = 0.57198(3); D″₀ = 1.20(2) × 10⁶; T′_1.1 = 20043.423(2); B′₁ = 0.57528(4); D′₁ = 1.14(11) × 10⁶; B″₁ = 0.56674(4); D″₁ = 1.22(10) × 10⁶.     

[首页] « 上一页 [3] [4] [5] [6] [7] 8 [9] [10] [11] [12] [13] 下一页 » 末  页»

Cell type	Applications
Human polymorphonuclear leukocytes	(1) Detection of bactericidal defects, particularly chronic granulomatous disease
	(2) Detection of host opsonic defects (both immunoglobulin and complement ?C3b opsonic defects).
	(3) Analysis of drug effects on host cellular and opsonic defenses (9,11).
	(4) Characterization of bacteria or other particulate matter in terms of ability to generate opsonic activity and/or be ingested by phagocytic cells (3,7).
Alveolar macrophages	(1) Detection of environmental pollutant effects on respiratory defense mechanisms (against both particulate and soluble matter).
	(2) Analysis of drug effects on respiratory defense mechanisms, particularly drugs administered in the treatment of respiratory diseases.

The Characterization of Molecular Alkali‐Metal Azides.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.     

Wave packet interferometry and quantum state reconstruction by acousto-optic phase modulation

Studies of wave packet dynamics often involve phase-selective measurements of coherent optical signals generated from sequences of ultrashort laser pulses. In wave packet interferometry (WPI), the separation between the temporal envelopes of the pulses must be precisely monitored or maintained. Here we introduce a new (and easy to implement) experimental scheme for phase-selective measurements that combines acousto-optic phase modulation with ultrashort laser excitation to produce an intensity-modulated fluorescence signal. Synchronous detection, with respect to an appropriately constructed reference, allows the signal to be simultaneously measured at two phases differing by 90 degrees. Our method effectively decouples the relative temporal phase from the pulse envelopes of a collinear train of optical pulse pairs. We thus achieve a robust and high signal-to-noise scheme for WPI applications, such as quantum state reconstruction and electronic spectroscopy. The validity of the method is demonstrated, and state reconstruction is performed, on a model quantum system--atomic Rb vapor. Moreover, we show that our measurements recover the correct separation between the absorptive and dispersive contributions to the system susceptibility.     

Quantitative predictions of linear viscoelastic rheological properties of entangled polymers

The “dual constraint” model developed by Mead, Van Dyke et al. is here extended by inclusion of “early-time” contour-length fluctuations and constraint-release Rouse relaxation, and then evaluated by comparing its predictions with literature data for over 50 different linear and star polymers. By combining the reptation model of Doi and Edwards with contour-length fluctuations and constraint release, the model provides a systematic approach to prediction of the rheological properties of polymers. The parameters are taken from the literature and used consistently for linear polymers, star polymers, and their mixtures having the same chemical compositions. In most cases, the predictions of the model appears to agree well with data for monodisperse, bidisperse, and polydisperse linear and star polymers, except at low molecular weights. Received: 23 December 1999 Accepted: 28 March 2000     

Laser-induced fluorescence and microwave-optical double-resonance study of the B1Σ+-X1Σ+ system of magnesium monoxide

Doppler-limited, laser-induced fluorescence spectra on the B¹Σ⁺-X¹Σ⁺ (v′ = v″ = 0 and 1) system of MgO have been obtained. The results of the optical analysis were merged with our microwave-optical double-resonance measurements to produce the following set of spectroscopic parameters for the B and X states, where the units are in cm^?1, and the uncertainties represent 95% confidence limits: T′_0.0 = 20003.594(2); B′₀ = 0.58004(3); D′₀ = 1.13(2) × 10^?6; B″₀ = 0.57198(3); D″₀ = 1.20(2) × 10⁶; T′_1.1 = 20043.423(2); B′₁ = 0.57528(4); D′₁ = 1.14(11) × 10⁶; B″₁ = 0.56674(4); D″₁ = 1.22(10) × 10⁶.