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- Otto Vogl (64)
- Vincent Rotello (18)
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Articles 1 - 30 of 127
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Centers Of Polymer Science: Introduction, Otto Vogl
Centers Of Polymer Science: Introduction, Otto Vogl
Otto Vogl
Centers of Polymer Science describes polymer research activities taking place in Europe, Asia, and Australia primarily during the years between 1980 and 2000. This series of articles shows and records the activity in Polymer Science in this part of polymer history.
Book I, Otto Vogl: Papers And Patents, 1948-1970, Jane C. Vogl
Book I, Otto Vogl: Papers And Patents, 1948-1970, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Book Ii, Otto Vogl: Papers And Patents, 1970-1977, Jane C. Vogl
Book Ii, Otto Vogl: Papers And Patents, 1970-1977, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Efficient Gene Delivery Vectors By Tuning The Surface Charge Density Of Amino Acid-Functionalized Gold Nanoparticles, Ps Ghosh, Ck Kim, G Han, Ns Forbes, Vm Rotello
Efficient Gene Delivery Vectors By Tuning The Surface Charge Density Of Amino Acid-Functionalized Gold Nanoparticles, Ps Ghosh, Ck Kim, G Han, Ns Forbes, Vm Rotello
Vincent Rotello
Gold colloids functionalized with amino acids provide a scaffold for effective DNA binding with subsequent condensation. Particles with lysine and lysine dendron functionality formed particularly compact complexes and provided highly efficient gene delivery without any observed cytotoxicity. Nanoparticles functionalized with first generation lysine dendrons (NP-LysG1) were approximately 28-fold superior to polylysine in reporter gene expression. These amino acid-based nanoparticles were responsive to intracellular glutathione levels, providing a tool for controlled release and concomitant expression of DNA.
Comparative Genomics Of Geobacter Chemotaxis Genes Reveals Diverse Signaling Function, Hoa T. Tran, Julia Krushkal, Frances M. Antommattei, Derek R. Lovley, Robert Weis
Comparative Genomics Of Geobacter Chemotaxis Genes Reveals Diverse Signaling Function, Hoa T. Tran, Julia Krushkal, Frances M. Antommattei, Derek R. Lovley, Robert Weis
Robert Weis
Background Geobacter species are δ-Proteobacteria and are often the predominant species in a variety of sedimentary environments where Fe(III) reduction is important. Their ability to remediate contaminated environments and produce electricity makes them attractive for further study. Cell motility, biofilm formation, and type IV pili all appear important for the growth of Geobacter in changing environments and for electricity production. Recent studies in other bacteria have demonstrated that signaling pathways homologous to the paradigm established for Escherichia coli chemotaxis can regulate type IV pili-dependent motility, the synthesis of flagella and type IV pili, the production of extracellular matrix material, and …
Multiplexed Screening Of Cellular Uptake Of Gold Nanoparticles Using Laser Desorption/Ionization Mass Spectrometry, Zj Zhu, Ps Ghosh, Or Miranda, Rw Vachet, Vm Rotello
Multiplexed Screening Of Cellular Uptake Of Gold Nanoparticles Using Laser Desorption/Ionization Mass Spectrometry, Zj Zhu, Ps Ghosh, Or Miranda, Rw Vachet, Vm Rotello
Vincent Rotello
Gold nanoparticles (AuNPs) are highly promising candidates as drug delivery agents into cells of interest. We describe for the first time the multiplexed analysis of nanoparticle uptake by cells using mass spectrometry. We demonstrate that the cellular uptake of functionalized gold nanoparticles with cationic or neutral surface ligands can be readily determined using laser desorption/ionization mass spectrometry of cell lysates. The surface ligands have “mass barcodes” that allow different nanoparticles to be simultaneously identified and quantified at levels as low as 30 pmol. Using this method, we find that subtle changes to AuNP surface functionalities can lead to measurable changes …
Book Iii, Otto Vogl: Publications, 1977-1979, Jane C. Vogl
Book Iii, Otto Vogl: Publications, 1977-1979, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Book Iv, Otto Vogl: Publications, 1979-1981, Jane C. Vogl
Book Iv, Otto Vogl: Publications, 1979-1981, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Observations Of The Gas Reservoir Around A Star Forming Galaxy In The Early Universe, Brenda L. Frye, David V. Bowen, Mairead Hurley, Todd M. Tripp, Xiaohui Fan, Bradley Holden, Puragra Guhathakurta, Dan Coe, Tom Broadhurst, Eiichi Egami, G. Meylan
Observations Of The Gas Reservoir Around A Star Forming Galaxy In The Early Universe, Brenda L. Frye, David V. Bowen, Mairead Hurley, Todd M. Tripp, Xiaohui Fan, Bradley Holden, Puragra Guhathakurta, Dan Coe, Tom Broadhurst, Eiichi Egami, G. Meylan
Todd M. Tripp
We present a high signal-to-noise spectrum of a bright galaxy at z = 4.9 in 14 h of integration on VLT FORS2. This galaxy is extremely bright, i_850 = 23.10 +/- 0.01, and is strongly-lensed by the foreground massive galaxy cluster Abell 1689 (z=0.18). Stellar continuum is seen longward of the Ly-alpha emission line at ~7100 \AA, while intergalactic H I produces strong absorption shortward of Ly-alpha. Two transmission spikes at ~6800 Angstroms (A) and ~7040 A are also visible, along with other structures at shorter wavelengths. Although fainter than a QSO, the absence of a strong central ultraviolet flux …
Stream Simulation: An Ecological Approach To Providing Passage For Aquatic Organisms At Road-Stream Crossings
Scott D. Jackson
No abstract provided.
Book V, Otto Vogl: Publications, 1981-1984, Jane C. Vogl
Book V, Otto Vogl: Publications, 1981-1984, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Dendron-Based Model Systems For Flavoenzyme Activity: Towards A New Class Of Synthetic Flavoenzyme, Ss Agasti, St Caldwell, G Cooke, Bj Jordan, A Kennedy, N Kryvokhyzha, G Rabani, S Rana, A Sanyal, Vm Rotello
Dendron-Based Model Systems For Flavoenzyme Activity: Towards A New Class Of Synthetic Flavoenzyme, Ss Agasti, St Caldwell, G Cooke, Bj Jordan, A Kennedy, N Kryvokhyzha, G Rabani, S Rana, A Sanyal, Vm Rotello
Vincent Rotello
Three generations of water-soluble flavin dendrons have been synthesized and the role dendrimer generation has on the physical and catalytic properties of these assemblies has been investigated.
Constraints On The Variability Of Quark Masses From Nuclear Binding, Thibault Damour, John Donoghue
Constraints On The Variability Of Quark Masses From Nuclear Binding, Thibault Damour, John Donoghue
John Donoghue
Based on recent work on nuclear binding, we update and extend the anthropic constraints on the light quark masses, with results that are more tightly constrained than previously obtained. We find that heavy nuclei would fall apart (because the attractive nuclear central potential becomes too weak) if the sum of the light quark masses m_u+m_d would exceed their physical values by 64% (at 95% confidence level). We summarize the anthropic constraints that follow from requiring the existence both of heavy atoms and of hydrogen. With the additional assumption that the quark Yukawa couplings do not vary, these constraints provide a …
Self-Assembly And Cross-Linking Of Fept Nanoparticles At Planar And Colloidal Liquid-Liquid Interfaces, P Arumugam, D Patra, B Samanta, Ss Agasti, C Subramani, Vm Rotello
Self-Assembly And Cross-Linking Of Fept Nanoparticles At Planar And Colloidal Liquid-Liquid Interfaces, P Arumugam, D Patra, B Samanta, Ss Agasti, C Subramani, Vm Rotello
Vincent Rotello
Terpyridine thiol functionalized FePt and Au NPs were self-assembled and cross-linked at the liquid−liquid interfaces using Fe(II) metal ion. Complexation of terpyridine with Fe(II) metal ion leads to NP network and affords stable membranes and colloidal shells at the liquid−liquid interfaces.
Self-Trapping Of Optical Vortices In Waveguide Lattices With A Self-Defocusing Nonlinearity, Dh Song, Cb Lou, Lq Tang, Xs Wang, W Li, Xy Chen, Kjh Law, H Susanto, Pg Kevrekidis, Jj Xu, Zg Chen
Self-Trapping Of Optical Vortices In Waveguide Lattices With A Self-Defocusing Nonlinearity, Dh Song, Cb Lou, Lq Tang, Xs Wang, W Li, Xy Chen, Kjh Law, H Susanto, Pg Kevrekidis, Jj Xu, Zg Chen
Panos Kevrekidis
We demonstrate the self-trapping of single- and double-charged optical vortices in waveguide lattices induced with a self-defocusing nonlinearity. Under appropriate conditions, a donut-shaped single-charged vortex evolves into a stable discrete gap vortex soliton, but a double-charged vortex turns into a self-trapped quadrupole-like structure. Spectrum measurement and numerical analysis suggest that the gap vortex soliton does not bifurcate from the edge of the Bloch band, quite different from previously observed gap spatial solitons. Our numerical findings are in good agreement with experimental observations.
Book Vi, Otto Vogl: Publications, 1984-1986, Jane C. Vogl
Book Vi, Otto Vogl: Publications, 1984-1986, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Manipulating Microparticles With Single Surface-Immobilized Nanoparticles, J Zhang, S Srivastava, R Duffadar, Jm Davis, Vm Rotello, Mm Santore
Manipulating Microparticles With Single Surface-Immobilized Nanoparticles, J Zhang, S Srivastava, R Duffadar, Jm Davis, Vm Rotello, Mm Santore
Vincent Rotello
This experimental study explores the capture and manipulation of micrometer-scale particles by single surface-immobilized nanoparticles. The nanoparticles, approximately 10 nm in diameter, are cationic and therefore attract the micrometer-scale silica particles in an analyte suspension. The supporting surface on which the nanoparticles reside is negative (also silica) and repulsive toward approaching microparticles. In the limit where there are as few as 9 nanoparticles per square micrometer of collector, it becomes possible to capture and hold micrometer-scale silica particles with single nanoparticles. The strong nanoparticle−microparticle attractions, their nanometer-scale protrusion forward of the supporting surface, and their controlled density on the supporting …
Disk-Shaped Bose-Einstein Condensates In The Presence Of An Harmonic Trap And An Optical Lattice, T Kapitula, Pg Kevrekidis, Dj Frantzeskakis
Disk-Shaped Bose-Einstein Condensates In The Presence Of An Harmonic Trap And An Optical Lattice, T Kapitula, Pg Kevrekidis, Dj Frantzeskakis
Panos Kevrekidis
We study the existence and stability of solutions of the two-dimensional nonlinear Schrödinger equation in the combined presence of a parabolic and a periodic potential. The motivating physical example consists of Bose–Einstein condensates confined in an harmonic (e.g., magnetic) trap and an optical lattice. By connecting the nonlinear problem with the underlying linear spectrum, we examine the bifurcation of nonlinear modes out of the linear ones for both focusing and defocusing nonlinearities. In particular, we find real-valued solutions (such as multipoles) and complex-valued ones (such as vortices). A primary motivation of the present work is to develop “rules of thumb” …
Book Vii, Otto Vogl: Publications, 1987-1989, Jane C. Vogl
Book Vii, Otto Vogl: Publications, 1987-1989, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Synthetic "Chaperones'': Nanoparticle-Mediated Refolding Of Thermally Denatured Proteins, M De, Vm Rotello
Synthetic "Chaperones'': Nanoparticle-Mediated Refolding Of Thermally Denatured Proteins, M De, Vm Rotello
Vincent Rotello
Thermally denatured chymotrypsin, lysozyme and papain are substantially refolded towards their native conformation by gold nanoparticle bearing dicarboxylate sidechains.
Tuneable Pseudorotaxane Formation Between A Biotin-Avidin Bioconjugate And Cbpqt(4+), St Caldwell, G Cooke, A Cooper, M Nutley, G Rabani, V Rotello, Bo Smith, P Woisel
Tuneable Pseudorotaxane Formation Between A Biotin-Avidin Bioconjugate And Cbpqt(4+), St Caldwell, G Cooke, A Cooper, M Nutley, G Rabani, V Rotello, Bo Smith, P Woisel
Vincent Rotello
A biotinylated 1,5-dialkoxynaphthalene derivative has been shown to have the ability to bind strongly to avidin and thus act as an artificial binding site for cyclobis(paraquat-p-phenylene) thereby facilitating the formation of a tuneable pseudorotaxane-based bioconjugate.
Book Viii, Otto Vogl: Publications, 1989-1992, Jane C. Vogl
Book Viii, Otto Vogl: Publications, 1989-1992, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Public Power, Private Dams: The Hells Canyon High Dam Controversy, Eve Vogel
Public Power, Private Dams: The Hells Canyon High Dam Controversy, Eve Vogel
Eve Vogel
The article reviews the book "Public Power, Private Dams: The Hells Canyon High Dam Controversy," by Karl Brooks.
Complementary Dimerization Of Microtubule-Associated Protein Tau: Implications For Microtubule Bundling And Tau-Mediated Pathogensis, Jennifer Ross, Kenneth J. Rosenberg, H. Eric Feinstein, Stuart C. Feinstein, Jacob Israelachvili
Complementary Dimerization Of Microtubule-Associated Protein Tau: Implications For Microtubule Bundling And Tau-Mediated Pathogensis, Jennifer Ross, Kenneth J. Rosenberg, H. Eric Feinstein, Stuart C. Feinstein, Jacob Israelachvili
Jennifer Ross
Tau is an intrinsically unstructured microtubule (MT)-associated protein capable of binding to and organizing MTs into evenly spaced parallel assemblies known as “MT bundles.” How tau achieves MT bundling is enigmatic because each tau molecule possesses only one MT-binding region. To dissect this complex behavior, we have used a surface forces apparatus to measure the interaction forces of the six CNS tau isoforms when bound to mica substrates in vitro. Two types of measurements were performed for each isoform: symmetric configuration experiments measured the interactions between two tau-coated mica surfaces, whereas “asymmetric” experiments examined tau-coated surfaces interacting with a smooth …
Neutral Hydrogen Clouds In The M81/M82 Group, Katie M. Chynoweth, Glen I. Langston, Min S. Yun, Felix J. Lockman, K H R Rubin, Sarah A. Scoles
Neutral Hydrogen Clouds In The M81/M82 Group, Katie M. Chynoweth, Glen I. Langston, Min S. Yun, Felix J. Lockman, K H R Rubin, Sarah A. Scoles
Min S. Yun
We have observed a 3° × 3° area centered on the M81/M82 group of galaxies using the Robert C. Byrd Green Bank Telescope in a search for analogs to the high-velocity clouds of neutral hydrogen found around our Galaxy. The velocity range from –605 to –85 km s–1 and from 25 to 1970 km s–1 was searched for H I clouds. Over the inner 2° × 2° the 7σ detection threshold was 9.6 × 105 M sun. We detect five previously unknown H I clouds associated with the group, as well as numerous associated filamentary H I structures, all lying …
Book Ix, Otto Vogl: Publications, 1993-1995, Jane C. Vogl
Book Ix, Otto Vogl: Publications, 1993-1995, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
A Scintillator Purification System For The Borexino Solar Neutrino Detector, Andrea Pocar
A Scintillator Purification System For The Borexino Solar Neutrino Detector, Andrea Pocar
Andrea Pocar
Purification of the 278 tons of liquid scintillator and 889 tons of buffer shielding for the Borexino solar neutrino detector was performed with a system that combined distillation, water extraction, gas stripping and filtration. The purification of the scintillator achieved unprecedented low backgrounds for the large scale liquid scintillation detector. This paper describes the principles of operation, design, construction and commissioning of the purification system, and reviews the requirements and methods to achieve system cleanliness and leak-tightness.
Plane Waves And Localized Modes In Quadratic Waveguide Arrays, H Susanto, Rl Horne, N Whitaker, Pg Kevrekidis
Plane Waves And Localized Modes In Quadratic Waveguide Arrays, H Susanto, Rl Horne, N Whitaker, Pg Kevrekidis
Panos Kevrekidis
In this paper, we examine theoretically the system of periodically poled LiNbO3 waveguide arrays that feature a quadratic nonlinearity and that have recently become accessible to experimental studies. Motivated by these earlier works, we provide a detailed analytical study of the existence, stability, and dynamics of plane wave delocalized solutions, as well as that of strongly localized modes consisting of a few sites. The linear stability of both classes of solutions is quantified as a function of the system parameters, such as the wave vector mismatch parameter or the interchannel coupling strength, using experimentally accessible ranges. Our findings are, in …
Book X, Otto Vogl: Publications, 1996-1998, Jane C. Vogl
Book X, Otto Vogl: Publications, 1996-1998, Jane C. Vogl
Otto Vogl
Books I-XII include citations to Otto Vogl's publications and patents. Printed versions of these twelve volumes are also available in the Integrated Sciences and Engineering Library of the University of Massachusetts in Amherst. MA, Lederle Graduate Research Center. The printed volumes include the full reprints of all cited publications.
Electricity Generation By Geobacter Sulfurreducens Attached To Gold Electrodes, H Richter, K Mccarthy, Kp Nevin, Jp Johnson, Vm Rotello, Dr Lovley
Electricity Generation By Geobacter Sulfurreducens Attached To Gold Electrodes, H Richter, K Mccarthy, Kp Nevin, Jp Johnson, Vm Rotello, Dr Lovley
Vincent Rotello
The versatility of gold for electrode manufacture suggests that it could be an ideal material for some microbial fuel cell applications. However, previous studies have suggested that microorganisms that readily transfer electrons to graphite do not transfer electrons to gold. Investigations with Geobacter sulfurreducens demonstrated that it could grow on gold anodes producing current nearly as effectively as with graphite anodes. Current production was associated with the development of G. sulfurreducens biofilms up to 40 μm thick. No current was produced if pilA, the gene for the structural protein of the conductive pili of G. sulfurreducens, was deleted. The finding …