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University of Massachusetts Amherst

1990

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Articles 1 - 30 of 35

Full-Text Articles in Physical Sciences and Mathematics

Polymer Science In Hungary, Part Iii. The Industrial Research Institutes And Their Factories, Otto Vogl, Gyula Hardy, Sandor Doubravsky, Margit Iring, Ferenc Tudos Dec 1990

Polymer Science In Hungary, Part Iii. The Industrial Research Institutes And Their Factories, Otto Vogl, Gyula Hardy, Sandor Doubravsky, Margit Iring, Ferenc Tudos

Emeritus Faculty Author Gallery

No abstract provided.


73. Professor Cristofor I. Simionescu On His 70th Birthday, Otto Vogl, Ioan I. Negulescu Dec 1990

73. Professor Cristofor I. Simionescu On His 70th Birthday, Otto Vogl, Ioan I. Negulescu

Emeritus Faculty Author Gallery

No abstract provided.


Organic And Polymeric Nonlinear Optical Materials, Otto Vogl, Donald R. Ulrich Dec 1990

Organic And Polymeric Nonlinear Optical Materials, Otto Vogl, Donald R. Ulrich

Emeritus Faculty Author Gallery

No abstract provided.


73. Professor Cristofor I. Simionescu On His 70th Birthday, Otto Vogl, Ioan I. Negulescu Dec 1990

73. Professor Cristofor I. Simionescu On His 70th Birthday, Otto Vogl, Ioan I. Negulescu

Otto Vogl

No abstract provided.


Organic And Polymeric Nonlinear Optical Materials, Otto Vogl, Donald R. Ulrich Dec 1990

Organic And Polymeric Nonlinear Optical Materials, Otto Vogl, Donald R. Ulrich

Otto Vogl

No abstract provided.


Polymer Science In Hungary, Part Iii. The Industrial Research Institutes And Their Factories, Otto Vogl, Gyula Hardy, Sandor Doubravsky, Margit Iring, Ferenc Tudos Dec 1990

Polymer Science In Hungary, Part Iii. The Industrial Research Institutes And Their Factories, Otto Vogl, Gyula Hardy, Sandor Doubravsky, Margit Iring, Ferenc Tudos

Otto Vogl

No abstract provided.


Elastic Magnetic Electron Scattering From 'Ca, H Baghaei, A Cichocki, J B. Flanz, M Frodyma, Y Han, R S. Hicks, R A. Miskimen, Gerald Alvin Peterson, S H. Rokni Dec 1990

Elastic Magnetic Electron Scattering From 'Ca, H Baghaei, A Cichocki, J B. Flanz, M Frodyma, Y Han, R S. Hicks, R A. Miskimen, Gerald Alvin Peterson, S H. Rokni

Gerald Alvin Peterson

The elastic magnetic form factor of 41Ca has been determined by 180° electron scattering in the momentum-transfer range 0.9–2.0 fm-1. An analysis of the data indicates that the amplitudes of the M3 and M5 multipoles are quenched by factors of 0.57±0.16 and 0.68±0.07 relative to the simple shell model. In contrast, the magnitude of the M7 form factor is in good accord with this model. Calculations that include multiparticle-multihole configurations in the 1f7/2 and 1d3/2 subshells, first-order core polarization to higher excited orbitals, and meson exchange currents give reasonable agreement with the data for all multipoles. The rms radius of …


Polymer Science In Hungary, Part Ii. The Universities In Hungary, Otto Vogl, Jozef Varga, Margit Iring, Ferenc Tudos Nov 1990

Polymer Science In Hungary, Part Ii. The Universities In Hungary, Otto Vogl, Jozef Varga, Margit Iring, Ferenc Tudos

Emeritus Faculty Author Gallery

No abstract provided.


74. Professor Cristofor I. Simionescu On His 70th Birthday, Otto Vogl, Ioan I. Negulescu Nov 1990

74. Professor Cristofor I. Simionescu On His 70th Birthday, Otto Vogl, Ioan I. Negulescu

Emeritus Faculty Author Gallery

No abstract provided.


9th International Symposium On Cationic Polymerization And Related Ionic Processes, Otto Vogl Nov 1990

9th International Symposium On Cationic Polymerization And Related Ionic Processes, Otto Vogl

Emeritus Faculty Author Gallery

No abstract provided.


9th International Symposium On Cationic Polymerization And Related Ionic Processes, Otto Vogl Nov 1990

9th International Symposium On Cationic Polymerization And Related Ionic Processes, Otto Vogl

Otto Vogl

No abstract provided.


Polymer Science In Hungary, Part Ii. The Universities In Hungary, Otto Vogl, Jozef Varga, Margit Iring, Ferenc Tudos Nov 1990

Polymer Science In Hungary, Part Ii. The Universities In Hungary, Otto Vogl, Jozef Varga, Margit Iring, Ferenc Tudos

Otto Vogl

No abstract provided.


74. Professor Cristofor I. Simionescu On His 70th Birthday, Otto Vogl, Ioan I. Negulescu Nov 1990

74. Professor Cristofor I. Simionescu On His 70th Birthday, Otto Vogl, Ioan I. Negulescu

Otto Vogl

No abstract provided.


Polymer Science In Hungary. Part I. The Institutes Of The Hungarian Academy Of Sciences, Otto Vogl, Ferenc Tudos, Margit Iring Oct 1990

Polymer Science In Hungary. Part I. The Institutes Of The Hungarian Academy Of Sciences, Otto Vogl, Ferenc Tudos, Margit Iring

Emeritus Faculty Author Gallery

No abstract provided.


First Pacific Polymer Conference, Jane C. Vogl, Gerald Kirshenbaum Oct 1990

First Pacific Polymer Conference, Jane C. Vogl, Gerald Kirshenbaum

Emeritus Faculty Author Gallery

No abstract provided.


Polymer Science In Hungary. Part I. The Institutes Of The Hungarian Academy Of Sciences, Otto Vogl, Ferenc Tudos, Margit Iring Oct 1990

Polymer Science In Hungary. Part I. The Institutes Of The Hungarian Academy Of Sciences, Otto Vogl, Ferenc Tudos, Margit Iring

Otto Vogl

No abstract provided.


First Pacific Polymer Conference, Jane C. Vogl, Gerald Kirshenbaum Oct 1990

First Pacific Polymer Conference, Jane C. Vogl, Gerald Kirshenbaum

Otto Vogl

No abstract provided.


Words As Battle Cries: Symbiogenesis And The New Field Of Endocytobiology, Lynn Margulis Oct 1990

Words As Battle Cries: Symbiogenesis And The New Field Of Endocytobiology, Lynn Margulis

Lynn Margulis (1938 - 2011)

No abstract provided.


Second Euro-American Conference In Oxford On “Functional Polymers And Biopolymers”, Otto Vogl, Jane C. Vogl Sep 1990

Second Euro-American Conference In Oxford On “Functional Polymers And Biopolymers”, Otto Vogl, Jane C. Vogl

Emeritus Faculty Author Gallery

No abstract provided.


Second Euro-American Conference In Oxford On “Functional Polymers And Biopolymers”, Otto Vogl, Jane C. Vogl Sep 1990

Second Euro-American Conference In Oxford On “Functional Polymers And Biopolymers”, Otto Vogl, Jane C. Vogl

Otto Vogl

No abstract provided.


Transverse Electrodisintegration Of The Deuteron In The Threshold Region At High Q2,", R G. Arnold, D Benton, P E. Bosted, L Clogher, B Debebe, M B. Frodyma, R S. Hicks, A Hotta, Gerald Alvin Peterson Jul 1990

Transverse Electrodisintegration Of The Deuteron In The Threshold Region At High Q2,", R G. Arnold, D Benton, P E. Bosted, L Clogher, B Debebe, M B. Frodyma, R S. Hicks, A Hotta, Gerald Alvin Peterson

Gerald Alvin Peterson

Cross sections for 180° deuteron electrodisintegration have been measured near threshold for the Q2 range 1.21 to 2.77 (GeV/c)2. The data are compared to several nonrelativistic meson-nucleon and hybrid quark-hadron models. The data are in strong disagreement with the impulse approximation, indicating the importance of non-nucleonic degrees of freedom. None of the models are in good agreement with the data at all values of Q2. The ratio W1/W2 of inelastic structure functions has been extracted using previous forward angle data and is found to decrease strongly near threshold, also indicating the importance of interaction effects.


Measurements Of The Deuteron And Proton Magnetic Form Factors At Large Momentum Transfers, P E. Bosted, A T. Katramatou, R G. Arnold, D Benton, L Clogher, G De Chambrier, J Lambert, A Lung, G G. Petratos, A Rahbar, S E. Rock, Z M. Szalata, B Debebe, M Frodyma, R S. Hicks, A Hotta, Gerald Alvin Peterson, R A. Gearhart, J Alster, J Lichtenstadt, F Dietrich, K Van Bibber Jul 1990

Measurements Of The Deuteron And Proton Magnetic Form Factors At Large Momentum Transfers, P E. Bosted, A T. Katramatou, R G. Arnold, D Benton, L Clogher, G De Chambrier, J Lambert, A Lung, G G. Petratos, A Rahbar, S E. Rock, Z M. Szalata, B Debebe, M Frodyma, R S. Hicks, A Hotta, Gerald Alvin Peterson, R A. Gearhart, J Alster, J Lichtenstadt, F Dietrich, K Van Bibber

Gerald Alvin Peterson

Measurements of the deuteron elastic magnetic structure function B(Q') are reported at squared four-momentum transfer values 1.20~ Qi ~ 2.77 (GeV/c)'. Also reported are values for the proton magnetic form factor Gstr(Q2) at 11 Q values between 0.49 and 1.75 (GeV/c) . The data were obtained using an electron beam of 0.5 to 1.3 GeV. Electrons backscattered near 180' were detected in coincidence with deuterons or protons recoiling near 0 in a large solid-angle double-arm spectrometer system. The data for B(Q ) are found to decrease rapidly from Q =1.2 to 2 (GeV/c), and then rise to a secondary maximum …


Impacts Of Land Use Laws And Policies Massachusetts State Superfund Program, Umass Amherst Center Economic Development Jan 1990

Impacts Of Land Use Laws And Policies Massachusetts State Superfund Program, Umass Amherst Center Economic Development

Center for Economic Development Technical Reports

The reason for this report was to examine the Massachusetts state Superfund law, and the statutory remedies that Massachusetts relies on to recover the cost associated with the cleanup of oil and hazardous materials released into the environment.


A Study Of Laser Ablation And Slurry Nebulisation Sample Introduction For The Analysis Of Geochemical Materials By Inductively Coupled Plasma Spectrometry, Julian Tyson, S. A. Darke, S. E. Long, C. J. Pickford Jan 1990

A Study Of Laser Ablation And Slurry Nebulisation Sample Introduction For The Analysis Of Geochemical Materials By Inductively Coupled Plasma Spectrometry, Julian Tyson, S. A. Darke, S. E. Long, C. J. Pickford

Chemistry Department Faculty Publication Series

No abstract provided.


Elimination Of Double Peaks In The Iodimetric Flow Injection Visible Spectrophotometric Determination Of Sulphite Using A Single-Channel Manifold, Julian Tyson, A. G. Fogg, X. Wang Jan 1990

Elimination Of Double Peaks In The Iodimetric Flow Injection Visible Spectrophotometric Determination Of Sulphite Using A Single-Channel Manifold, Julian Tyson, A. G. Fogg, X. Wang

Chemistry Department Faculty Publication Series

A flow injection method of determining sulphite with amperometric monitoring of iodine using a single-channel manifold in which iodine is formed in the reverse flow injection (rFI) manner and reacts with sulphite dispersing in the normal flow injection (nFI) manner has been adapted for use with visible spectrophotometry. The carrier stream consists of an alkaline solution containing iodate and an excess of iodide: injections of acid and then of acidified sulphite are made. The decrease in the iodine signal (measured at 352 nm) in the presence of sulphite is proportional to the sulphite concentration in the injectate. The alkalinity of …


Shapes Of Flow Injection Signals: Effect Of Refractive Index On Spectrophotometric Signals Obtained For On-Line Formation Of Bromine From Bromate, Bromide, And Hydrogen Ion In A Single-Channel Manifold Using Large-Volume Time-Based Injections, Julian Tyson, A. G. Fogg, E. Cipko, L. Farabella Jan 1990

Shapes Of Flow Injection Signals: Effect Of Refractive Index On Spectrophotometric Signals Obtained For On-Line Formation Of Bromine From Bromate, Bromide, And Hydrogen Ion In A Single-Channel Manifold Using Large-Volume Time-Based Injections, Julian Tyson, A. G. Fogg, E. Cipko, L. Farabella

Chemistry Department Faculty Publication Series

The shapes of the spectrophotometric signals obtained with a single-channel manifold for large-volume (4 ml) time-based injections for the six possible combinations of the reagents bromate, bromide and nitric acid in the injectate and carrier stream, by which bromine can be formed on-line, have been determined. The injectate and carrier stream were 5.25 x 10-4 M in bromate, 0.030 M in bromide and 1 M in nitric acid when these reagents were present. The signals consisted of two separate peaks caused by formation of bromine at the front and rear boundaries of the injected bolus. When both injectate and carrier …


Is This Paper Within The Scope Of The Journal?, Julian Tyson Jan 1990

Is This Paper Within The Scope Of The Journal?, Julian Tyson

Chemistry Department Faculty Publication Series

No abstract provided.


A Comparison Of Boosted-Discharge Hollow Cathode Lamps And An Inductively Coupled Plasma (Icp) As Excitation Sources In Icp Atomic Fluorescence Spectrometry, Stanley Greenfield, Tariq M. Durrani, Julian Tyson, C. A. Watson Jan 1990

A Comparison Of Boosted-Discharge Hollow Cathode Lamps And An Inductively Coupled Plasma (Icp) As Excitation Sources In Icp Atomic Fluorescence Spectrometry, Stanley Greenfield, Tariq M. Durrani, Julian Tyson, C. A. Watson

Chemistry Department Faculty Publication Series

Copper, nickel and lead boosted-discharge hollow cathode lamps, run at recommended currents, have been compared with a high-powered inductively coupled plasma (ICP) as excitation sources in atomic fluorescence spectrometry (AFS). A similar comparison was made with a copper lamp run at higher currents. It was found that for lead and nickel, the fluorescence spectra differed in the relative intensities of the transitions observed with the two sources. No evidence was found for a difference in radiances between the two sources when the lamp was overrun. Although the lamps gave rise to lower blank standard deviation values, detection limits were worse …


Applications Of The Single Well Stirred Tank Model For Dispersion In Flow Injection, Julian Tyson Jan 1990

Applications Of The Single Well Stirred Tank Model For Dispersion In Flow Injection, Julian Tyson

Chemistry Department Faculty Publication Series

The single well stirred tank model in which dispersion is modelled by the passage of a slug of fluid through the tank has been used to compare the sensitivity that can be obtained by the use of three types of flow injection manifold, which incorporate on-line chemical reaction. These manifolds are the single-line manifold, the double-line manifold and the single-line manifold used in the reverse mode (i.e., the reagent is injected into the sample which constitutes the carrier stream). The model indicates that each manifold type will give the same sensitivity, but that operating conditions and throughput will be different …


Continuing Developments In Atomizer, Source, Inductively Coupled Plasmas In Atomic Fluorescence Spectrometry, Stanley Greenfield, Tariq M. Durrani, Julian Tyson Jan 1990

Continuing Developments In Atomizer, Source, Inductively Coupled Plasmas In Atomic Fluorescence Spectrometry, Stanley Greenfield, Tariq M. Durrani, Julian Tyson

Chemistry Department Faculty Publication Series

No abstract provided.