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The Production Of 44ti And 60co In Supernovae, F. X. Timmes, S. E. Woosley, Dieter H. Hartmann, R. D. Hoffman Jun 1996

The Production Of 44ti And 60co In Supernovae, F. X. Timmes, S. E. Woosley, Dieter H. Hartmann, R. D. Hoffman

Publications

The production of the radioactive isotopes 44Ti and 60Co in all types of supernovae is examined and compared to observational constraints inculding Galactic gamma-ray surveys, measurements of the diffuse 511 keV radiation, gamma-ray observations of Cas A, the late-time light curve of SN 1987A, and isotopic anomalies found in silicon carbide grains in meteorities. The (revished) line flux from 44Ti decay in the Cas A supernova remnant reported by COMPTEL on the Compton Gamma Ray Observatory is near the upper bound expected from our models. The necessary concurrent ejection of 56Ni would also imply that Cas A was a brighter …

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Involvement Of The Vacuolar Proton-Translocating Atpase In Multiple Steps Of The Endo-Lysosomal System And In The Contractile Vacuole System Of Dictyostelium Discoideum, Lesly A. Temesvari, Juan M. Rodriguez-Paris, John M. Bush, Linyi Zhang, James A. Cardelli Jun 1996

Involvement Of The Vacuolar Proton-Translocating Atpase In Multiple Steps Of The Endo-Lysosomal System And In The Contractile Vacuole System Of Dictyostelium Discoideum, Lesly A. Temesvari, Juan M. Rodriguez-Paris, John M. Bush, Linyi Zhang, James A. Cardelli

Publications

We have investigated the effects of Concanamycin A (CMA), a specific inhibitor of vacuolar type H(+)-ATPases, on acidification and function of the endo-lysosomal and contractile vacuole (CV) systems of D. discoideum. This drug inhibited acidification and increased the pH of endo-lysosomal vesicles both in vivo and in vitro in a dose dependent manner. Treatment also inhibited endocytosis and exocytosis of fluid phase, and phagocytosis of latex beads. This report also confirms our previous conclusions (Cardelli et al. (1989) J. Biol. Chem. 264, 3454–3463) that maintenance of acidic pH in lumenal compartments is required for efficient processing and targeting of a …

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A Possible X-Ray Counterpart To Sgr 1900+14, K. Hurley, P. Li, F. Vrba, C. Luginbuhl, Dieter H. Hartmann, C. Kouvelioutou, C. Meegan, G. Fishman, S. Kulkarni, D. Frail May 1996

A Possible X-Ray Counterpart To Sgr 1900+14, K. Hurley, P. Li, F. Vrba, C. Luginbuhl, Dieter H. Hartmann, C. Kouvelioutou, C. Meegan, G. Fishman, S. Kulkarni, D. Frail

Publications

The location of the soft gamma repeater SGR 1900ϩ14 was recently reduced to two 15 arcmin2 alternate error boxes by the network synthesis method. We have used the ROSAT High Resolution Imager to observe the error box that is closest to the supernova remnant G42.8ϩ0.6. A quiescent, steady, point X-ray source was found at ␣(2000) ϭ 19h07m14!15, ␦(2000) ϭ 9Њ19Ј19"06, whose unabsorbed flux is 3 ϫ 10Ϫ12 ergs cmϪ2 sϪ1. Its position is also consistent with a peculiar double infrared source described in a companion paper. We have also examined this region using the VLA,1 and have obtained upper limits …

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48ca Production In Matter Expanding From High Temperature And Density, B S. Meyer, Tracy D. Krishnan, Donald D. Clayton May 1996

48ca Production In Matter Expanding From High Temperature And Density, B S. Meyer, Tracy D. Krishnan, Donald D. Clayton

Publications

We calculate with a large nuclear reaction network the nuclear dynamics associated with the expansions and cooling of initially hot and dense matter. We study matter with neutron excess near that of 48Ca, because one objective is to clarify the nucleosynthesis of that abundant neutron-rich nucleus, whose origin has been enigmatic. Expecting that supernovae provide the site of its origin, we take initial temperatures near T9 = 10 but survey a wide range of initial densities, corresponding to a wide range in initial entropies. The highest entropies are probably associated with winds from newborn neutron stars in Type II collapse …

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Uaa Student Showcase Journal: Recognizing Excellence (Spring 1996), N/A N/A Apr 1996

Uaa Student Showcase Journal: Recognizing Excellence (Spring 1996), N/A N/A

Publications

No abstract provided.

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The Wisdom Of Teacher Involvement In School-Linked Social Services, Jane Clark Lindle Apr 1996

The Wisdom Of Teacher Involvement In School-Linked Social Services, Jane Clark Lindle

Publications

Recently, school-linked services phenomena have been examined through various implementation strategies. Most discussions are divided over issues such as points of deliver, institutional or agency territoriality, as well as financing and payment schemes. This debate focuses on the less well examined concern over the role of classroom teachers in school-linked service delivery.

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Examination Of The Endosomal And Lysosomal Pathways In Dictyostelium Discoideum Myosin I Mutants, Lesly A. Temesvari, John M. Bush, Michelle D. Peterson, Kristine D. Novak, Margaret A. Titus, James A. Cardelli Mar 1996

Examination Of The Endosomal And Lysosomal Pathways In Dictyostelium Discoideum Myosin I Mutants, Lesly A. Temesvari, John M. Bush, Michelle D. Peterson, Kristine D. Novak, Margaret A. Titus, James A. Cardelli

Publications

The role of myosin Is in endosomal trafficking and the lysosomal system was investigated in a Dictyostelium discoideum myosin I double mutant myoB-/C-, that has been previously shown to exhibit defects in fluid-phase endocytosis during growth in suspension culture (Novak et al., 1995). Various properties of the endosomal pathway in the myoB-/C- double mutant as well as in the myoB- and myoC- single mutants, including intravesicular pH, and intracellular retention time and exocytosis of a fluid phase marker, were found to be indistinguishable from wild-type parental cells. The intimate connection between the contractile vacuole complex and the endocytic pathway in …

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Food Dispersion And Foraging Energetics: A Mechanistic Synthesis For Field Studies Of Avian Benthivores, James R. Lovvorn, Michael P. Gillingham Mar 1996

Food Dispersion And Foraging Energetics: A Mechanistic Synthesis For Field Studies Of Avian Benthivores, James R. Lovvorn, Michael P. Gillingham

Publications

Much effort has focused on modeling and measuring the energy costs of free existence and the foraging strategies of animals. However, few studies have quantitatively linked these approaches to the patch structure of foods in the field. We developed an individual—based model that relates field measurements of the dispersion of benthic foods to search costs and foraging profitability of diving ducks. On Lake Mattamuskeet, North Carolina, Canvasback ducks (Aythya valisineria) eat only the belowground winter buds of the submerged plant Vallisneria americana. We measured and modeled the patch structure of winter buds at the level of potential …

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Main Sequence Masses And Radii From Gravitational Redshifts, Ted Von Hippel Feb 1996

Main Sequence Masses And Radii From Gravitational Redshifts, Ted Von Hippel

Publications

Modern instrumentation makes it possible to measure the mass to radius ratio for main sequence stars in open clusters from gravitational redshifts. For stars where independent information is available for either the mass or the radius, this application of general relativity directly determines the other quantity. Applicable examples are: 1) measuring the radii of solar metallicity main sequence stars for which the mass - luminosity relation is well known, 2) measuring the radii for stars where model atmospheres can be used to determine the surface gravity (the mass to radius squared ratio), 3) refining the mass - radius relation for …

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Efficient Interaction Of Hiv-1 With Purified Dendritic Cells Via Multiple Chemokine Coreceptors, Angela Granelli-Piperno, Bernard Moser, Melissa Pope Jan 1996

Efficient Interaction Of Hiv-1 With Purified Dendritic Cells Via Multiple Chemokine Coreceptors, Angela Granelli-Piperno, Bernard Moser, Melissa Pope

Publications

HIV-1 actively replicates in dendritic cell (DC)-T cell cocultures, but it has been difficult to demonstrate substantial refection of purified mature DCs. We now find that HIV-1 begins reverse transcription much more efficiently in DCs than T cells, even though T cells have higher levels of CD4 and gp120 binding. DCs isolated from skin or from blood precursors behave similarly. Several M-tropic strains and the T-tropic strain IIIB enter DCs efficiently, as assessed by the progressive formation of the early products of reverse transcription after a 90-min virus pulse at 37°C. However, few late gag-containing sequences are detected, so that …

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Law [Natural Resources Defense Council], David Getches Jan 1996

Law [Natural Resources Defense Council], David Getches

Publications

Article published in the Winter, 1996 issue of the Amicus Journal.

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Book Review - Caddisflies (Trichoptera) Of The Interior Highlands Of North America, John C. Morse Jan 1996

Book Review - Caddisflies (Trichoptera) Of The Interior Highlands Of North America, John C. Morse

Publications

No abstract provided.

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Book Review - The Adult Limnephilus Leach (Trichoptera:Limnephilidae) Of The New World, John C. Morse Jan 1996

Book Review - The Adult Limnephilus Leach (Trichoptera:Limnephilidae) Of The New World, John C. Morse

Publications

No abstract provided.

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Computer Conferencing And The Classroom Writing Context, 1996, Chris Benson Jan 1996

Computer Conferencing And The Classroom Writing Context, 1996, Chris Benson

Publications

Published as the final chapter in "The Nearness of You: Students and Teachers Writing On-Line." Eds. Chris Edgar and Susan Nelson Wood, NY: Teachers and Writers, 1996.

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Improved Limits On Gammy-Ray Burst Repetition From Batse, Max Tagmark, Dieter H. Hartmann, Michael S. Briggs, Jon Hakkila, Charles A. Meegan Jan 1996

Improved Limits On Gammy-Ray Burst Repetition From Batse, Max Tagmark, Dieter H. Hartmann, Michael S. Briggs, Jon Hakkila, Charles A. Meegan

Publications

We tighten previous upper limits on gamma-ray burst repetition by analyzing the angular power spectrum of the BATSE 3B catalog of 1122 bursts. At 95% confidence, we find that no more that 2% of all observed bursts can be labeled as repeaters, even if no sources are observed to repeat more than once. If a fraction f of all observed bursts can be labeled as repeaters that are observed to bursts v times each, then all models ( v - 1) f >~ 0.05 are rules out as 99% confidence, as compares to the best previous 99% limit (v - …

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Journal Of The Community Development Society Vol. 27, No. 02, Center For Public Affairs Research (Cpar) Jan 1996

Journal Of The Community Development Society Vol. 27, No. 02, Center For Public Affairs Research (Cpar)

Publications

Good Bye. This editor's note completes my five years as the editor of the Journal of the Community Development Society. It has been a fast and a very important five years. Like most things in this dramatically changing world, in those five years the practice of community development has changed. Likewise the Community Development Society has changed, and I think so has its Journal. Two of these changes are worth noting. First, while still retaining its social science character, the Journal has published articles with broader research questions. In other words, the goals of the articles have changed. While many …

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Journal Of The Community Development Society Vol. 27, No. 01, Center For Public Affairs Research (Cpar) Jan 1996

Journal Of The Community Development Society Vol. 27, No. 01, Center For Public Affairs Research (Cpar)

Publications

This year the Community Development Society continues its movement toward an international organization devoted to the practice and theory of purposive community change by holding its first annual meeting away from North America. The Australian members of CDS have organized a world class conference on community development. It is sure to have an impact on the Society for many years to come. In commemoration of the first "international" conference, this edition of the Journal of the Community Development Society is devoting a significant portion of its articles to research and commentary on community development theory and practice taking place outside …

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A Text Is Just A Text, Paul F. Campos Jan 1996

A Text Is Just A Text, Paul F. Campos

Publications

No abstract provided.

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Punishment And Procedure: A Different View Of The American Criminal Justice System, William T. Pizzi Jan 1996

Punishment And Procedure: A Different View Of The American Criminal Justice System, William T. Pizzi

Publications

No abstract provided.

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That's My Story And I'M Stickin' To It: The Jury As Fifth Business In The Trial Of O.J. Simpson And Other Matters, Marianne Wesson Jan 1996

That's My Story And I'M Stickin' To It: The Jury As Fifth Business In The Trial Of O.J. Simpson And Other Matters, Marianne Wesson

Publications

No abstract provided.

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California’S Proposition 187--Does It Mean What It Says? Does It Say What It Means? A Textual And Constitutional Analysis, Lolita K. Buckner Inniss Jan 1996

California’S Proposition 187--Does It Mean What It Says? Does It Say What It Means? A Textual And Constitutional Analysis, Lolita K. Buckner Inniss

Publications

No abstract provided.

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Book Review, Lakshman D. Guruswamy Jan 1996

Book Review, Lakshman D. Guruswamy

Publications

No abstract provided.

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Introduction: O.J. Simpson And The Criminal Justice System On Trial, Christopher B. Mueller Jan 1996

Introduction: O.J. Simpson And The Criminal Justice System On Trial, Christopher B. Mueller

Publications

No abstract provided.

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The Future Of Federalism, Robert F. Nagel Jan 1996

The Future Of Federalism, Robert F. Nagel

Publications

No abstract provided.

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The Term Limits Dissent: What Nerve, Robert F. Nagel Jan 1996

The Term Limits Dissent: What Nerve, Robert F. Nagel

Publications

No abstract provided.

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Teaching Research To Faculty: Accommodating Cultural And Learning-Style Differences, Jane Thompson Jan 1996

Teaching Research To Faculty: Accommodating Cultural And Learning-Style Differences, Jane Thompson

Publications

Ms. Thompson explores the challenge of teaching law school faculty how to research effectively, especially in light of a unique "faculty culture" and differences in individual learning styles.

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Book Review, Marianne Wesson Jan 1996

Book Review, Marianne Wesson

Publications

No abstract provided.

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The Public Lands And The National Heritage, Charles F. Wilkinson Jan 1996

The Public Lands And The National Heritage, Charles F. Wilkinson

Publications

No abstract provided.

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Discovering Who We Are: An English Perspective On The Simpson Trial, William T. Pizzi Jan 1996

Discovering Who We Are: An English Perspective On The Simpson Trial, William T. Pizzi

Publications

No abstract provided.

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Reflections On Executive Compensation And A Modest Proposal For (Further) Reform, Mark J. Loewenstein Jan 1996

Reflections On Executive Compensation And A Modest Proposal For (Further) Reform, Mark J. Loewenstein

Publications

No abstract provided.

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