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Creator | Title | Description | Subject | Date |
51 |
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Wu, Yong-Shi | Algebraic and geometric aspects of generalized quantum dynamics | We briefly discuss some algebraic and geometric aspects of the generalized Poisson bracket and noncommutative phase space for generalized quantum dynamics, which are analogous to properties of the classical Poisson bracket and ordinary symplectic structure. | Quantum dynamics; Jacobi identity | 1994-06 |
52 |
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Wu, Yong-Shi | Algebraic solution for a two-level atom in radiation fields and the Freeman resonances | Using techniques of complex analysis in an algebraic approach, we solve the wave equation for a two-level atom interacting with a monochromatic light field exactly. A closed-form expression for the quasienergies is obtained, which shows that the Bloch-Siegert shift is always finite, regardless of ... | Bloch-Siegert shift; Freeman resonances; Quasienergies | 2006-02 |
53 |
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Armentrout, Peter B. | Alkali metal cation interactions with 12-crown-4 in the gas phase: revisited | Quantitative interactions of alkali metal cations with the cyclic 12-crown-4 polyether ligand (12C4) are studied. Experimentally, Rb+(12C4) and Cs+(12C4) complexes are formed using electrospray ionization and their bond dissociation energies (BDEs) determined using threshold collision-induced dissoc... | | 2012-01-01 |
54 |
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Coley, Phyllis D.; Lokvam, John; Kursar, Thomas A. | Allelochemic function for a primary metabolite: the case of L-tyrosine hyper-production in Inga umbellifera (Fabaceae) | Young leaves of tropical forest trees experience far higher herbivory pressure than mature leaves of the same species. Selection on young leaves has led to diverse forms of defense chemical expression. Though most allelochemicals are secondary metabolites, allelochemic function for a primary metabol... | 5-amino-4-hydroxy-pentanoic acid; Panama; Barro Colorado Island; Fabaceae; Inga umbellifera; Primary metabolite; Heliothis virescens | 2006 |
55 |
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Capecchi, Mario R. | Altered enzymes in drug-resistant variants of mammalian tissue culture cells. | Two selective procedures are compared in an effort to isolate variants of mouse L cells containing structural gene mutations. Among the resulting variant cloned cell lines are found two types of alterations in theenzyme hypoxanthine phosphoribosyl transferase (EC 2.4.2.8.) (1): enzyme with altered ... | Drug Resistance; Azaguanine; Clone Cells; Hypoxanthines | 1973-11 |
56 |
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Adler, Frederick R. | Alternating host cell tropism shapes the persistence, evolution and coexistence of Epstein-Barr virus infections in human | Epstein-Barr virus (EBV) infects and can persist in a majority of people worldwide. Within an infected host, EBV targets two major cell types, B cells and epithelial cells, and viruses emerging from one cell type preferentially infect the other. We use mathematical models to understand why EBV infec... | | 2011 |
57 |
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Adler, Frederick R. | Alternating host cell tropism shapes the persistence, evolution and coexistence of Epstein-Barr virus infections in human | Epstein-Barr virus (EBV) infects and can persist in a majority of people worldwide. Within an infected host, EBV targets two major cell types, B cells and epithelial cells, and viruses emerging from one cell type preferentially infect the other. We use mathematical models to understand why EBV infec... | | 2010 |
58 |
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Olivera, Baldomero M. | Alternative splicing in the pore-forming region of shaker potassium channels | We have cloned cDNAs for the shaker potassium channel gene from the spiny lobster Panulirus interruptus. As previously found in Drosophila, there is alternative splicing at the 59 and 39 ends of the coding region. However, in Panulirus shaker, alternative splicing also occurs within the pore-forming... | Panulirus interruptus; Conotoxins; Shaker; Stomatogastric ganglion; Pore-forming region; Alternative splicing | 1997 |
59 |
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Coffin, Cheryl M.; Capecchi, Mario R. | Alveolar rhabdomyosarcomas in conditional Pax3:Fkhr mice: cooperativity of Ink4a/ARF and Trp53 loss of function. | Alveolar rhabdomyosarcoma is an aggressive childhood muscle cancer for which outcomes are poor when the disease is advanced. Although well-developed mouse models exist for embryonal and pleomorphic rhabdomyosarcomas, neither a spontaneous nor a transgenic mouse model of alveolar rhabdomyosarcoma has... | Cell Differentiation; Forkhead Transcription Factors; Myogenic Regulatory Factors | 2004-11-01 |
60 |
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Mattis, Daniel C.; Sutherland, Bill | Ambiguities with the relativistic δ-function potential | In many cases of physical interest, the 6-function potential is a very convenient approximation to more structured, and more difficult, short-ranged potentials. In relativistic theories, its use is often mandated because only a mathematical point has a relativistically invariant shape. Neverthele... | Delta function; Energy states | 1981-09 |
61 |
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Olivera, Baldomero M. | Aminoglycoside effects on voltage-sensitive calcium channels and neurotoxicity | To the Editor: Since ototoxicity and neuromuscular toxicity of aminoglycoside antibiotics are reversed by calcium, 1,2 and presynaptic events appear to be involved in aminoglycoside-induced neuromuscular blockade, 3,4 we suspected a role for voltage-sensitive calcium channels in aminoglycoside neuro... | Conotoxins | 1987 |
62 |
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Vardeny, Zeev Valentine; Gellermann, Werner | Amplified resonant Raman scattering in conducting polymer thin films | Using picosecond pulsed laser excitation, we investigate the optical emission characteristics of poly(2,5-dioctyloxy-p-phenylenevinylene), (DOO-PPV), thin films at high excitation intensities (~1-90 MW/cm2). We observe the presence of amplified resonance Raman scattering in the emission spectra of c... | Amplified resonant Raman scattering; High excitation intensities; pi-conjugated polymers | 1998 |
63 |
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Vardeny, Zeev Valentine | Amplified spontaneous emission and lasing in conducting polymers and fluorescent dyes in opals as photonic crystals | Spectral narrowing of photoluminescence (PL) and evolution of sharp emission lines upon optical excitation have been observed in opals made of SiO2 spheres infiltrated with conducting polymers such as OOPPV and MDDOPPV and also fluorescent dyes such as rhodamine 6G, NK-3483, and coumarin 120. Their ... | Amplified spontaneous emission; Lasing; Fluorescent dyes | 1999 |
64 |
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Vardeny, Zeev Valentine; Ehrenfreund, Eitan A. | Amplitude and phase modes in trans-polyacetylene: resonant Raman scattering and induced infrared activity | The resonant Raman scattering (RRS) from the three Ag modes of trans-polyacetylene and the charged-induced ir modes are analyzed with use of the amplitude- and phase-mode theories. It is shown that the observed phonon frequencies and the relative intensities of all modes obtained at various laser ex... | Induced infrared activity; Ag modes; Amplitude modes; Phase modes; Trans-polyacetylene | 1987-07 |
65 |
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Sokolsky, Pierre | An analog light scattering experiment of hexagonal icelike particles. part I: experimental apparatus and test measurements | An experimental apparatus to measure the scattering properties of hexagonal icelike particles in the analog manner at the helium neon laser wavelength of 0.633 mm has been designed and built. The instrument consists of an array of 36 highly sensitive and linear photodiode detectors that are positi... | | 1999 |
66 |
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Sokolsky, Pierre | An analog light scattering experiment of hexagonal icelike particles. part II: experimental and theoretical results | The scattering properties of hexagonal icelike crystals as measured in the analog manner by the experimental apparatus described in Part I are presented. The crystals are made out of sodium fluoride (NaF), which has an index of refraction similar to that of water ice. The experimentally determined... | | 1999 |
67 |
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Mattis, Daniel C. | An expanded Luttinger model | This paper generalizes Luttinger's model by introducing curvature (d2ε (k) dk2 ≠ 0 ) into the kinetic energy. An exact solution for arbitrary interactions is still possible in principle, but it now requires disentangling the eigenvalue spectrum of an harmonic string of interacting boson fields at... | | 2012-01-01 |
68 |
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Clayton, Dale H. | An experimental test of the effects of behavioral and immunological defenses against vectors: do they interact to protect birds from blood parasites? | Background: Blood-feeding arthropods can harm their hosts in many ways, such as through direct tissue damage and anemia, but also by distracting hosts from foraging or watching for predators. Blood-borne pathogens transmitted by arthropods can further harm the host. Thus, effective behavioral and im... | | 2014-01-01 |
69 |
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Parkinson, John Stansfield | An unorthodox sensory adaptation site in the E. coli serine chemoreceptor | The serine chemoreceptor of E. coli contains four canonical methylation sites for sensory adaptation that lie near inter-subunit helix interfaces of the Tsr homodimer. An unexplored fifth methylation site, E502, lies at an intra-subunit helix interface, closest to the HAMP domain that controls input... | | 2014-01-01 |
70 |
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Sperry, John S. | Analysis of circular bordered pit function I. Angiosperm vessels with homogenous pit membranes | A model predicted pit and vessel conductivity, the air-seed pressure for cavitation, and the implosion pressure causing vessel collapse. Predictions were based on measurements from 27 angiosperm species with circular bordered pits and air-seed pressures of 0.2-11.3 MPa. Vessel implosion pressure exc... | Functional wood anatomy; hydraulic architecture; plant biomechanics | 2004 |
71 |
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Sperry, John S. | Analysis of circular bordered pit function II. Gymnosperm tracheids with torus-margo pit membranes | A model of xylem conduit function was applied to gymnosperm tracheids with torus-margo pit membranes for comparison with angiosperm vessels. Tracheids from 17 gymnosperm tree species with circular bordered pits and air-seed pressures from 0.8 to 11.8 MPa were analyzed. Tracheids were more reinforced... | Functional wood anatomy; hydraulic architecture; plant biomechanics | 2004 |
72 |
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Beckerle, Mary C. | Analysis of the roles of microtubules and actin in erythrophore intracellular motility | The Holocentrus erythrophore, a red pigment cell, represents a model system for the study of organized intracellular transport. We have investigated the possibility that microtubules and actin are integral components of the pigment translocating motility machine. | Actin; Actomyosin; Erythrophore; Pigment | 1983 |
73 |
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Wu, Yong-Shi | Analyzing powers for ∏±-13C scattering at T∏=100 MeV | Measurements of the analyzing power for the nC(rr±,rr±) reaction at Trr = 100 MeV have been made at TRIUMF using a polarized target consisting of 99% 1 3C enriched butanol. Data were obtained for the ground and 3.68 MeV excited states at angles from 110° to 150° in 10° steps. The data are con... | | 1992-02 |
74 |
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Sperry, John S. | Anatomy of the palm Rhapis excelsa, IX. Xylem structure of the leaf insertion | STEMS OF PERENNIAL PLANTS, particularly trees, represent a considerable investment in biomass. Trees can survive even under the most adverse conditions, but only if the hydraulic integrity of the stem is preserved. A very important and vulnerable part of the stem is the xylem. As water is pulled int... | Palm stems; Palm stem anatomy; Palm leaves; Leaf insertion; Vessel network; Vessel-length distribution; Primary vascular stem tissue; Hydraulic architechture; Water column | 1983 |
75 |
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Sperry, John S. | Anatomy of the palm Rhapis excelsa, VIII. Vessel network and vessel-length distribution in the stem | THE CONCEPT of the vessel, a conducting unit consisting of a series of vessel elements lined up end to end, has been known for well over a century (e.g., Hartig, 1878). The fact that vessels are of limited length is of considerable functional importance. If a vessel is damaged (for example, by an in... | Palm stems; Palm stem anatomy; Vessel network; Vessel-length distribution; Primary vascular stem tissue; Hydraulic architechture; Water column | 1982 |