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Articles 691 - 720 of 2193
Full-Text Articles in Physical Sciences and Mathematics
Apotik Jual Obat Aborsi Jayapura Wa : 0812 1515 6620 Jual Obat Penggugur Ampuh Manjur Di Jayapura Papua, Anis Inayati01
Apotik Jual Obat Aborsi Jayapura Wa : 0812 1515 6620 Jual Obat Penggugur Ampuh Manjur Di Jayapura Papua, Anis Inayati01
Jual Obat Aborsi Tuntas 3 Jam Langsung Gugur
Acid-Base Chemical Mechanism Of Aspartase From Hafnia Alvei, Moon Young Yoon, Kim A. Thayer-Cook, Anthony J. Berdis, William E. Karsten, Klaus D. Schnackerz, Paul F. Cook
Acid-Base Chemical Mechanism Of Aspartase From Hafnia Alvei, Moon Young Yoon, Kim A. Thayer-Cook, Anthony J. Berdis, William E. Karsten, Klaus D. Schnackerz, Paul F. Cook
Chemistry Faculty Publications
An acid-base chemical mechanism is proposed for Hafnia alvei aspartase in which a proton is abstracted from C-3 of the monoanionic form of L-aspartate by an enzyme general base with a pK of 6.3-6.6 in the absence and presence of Mg2+. The resulting carbanion is presumably stabilized by delocalization of electrons into the β-carboxyl with the assistance of a protonated enzyme group in the vicinity of the β-carboxyl. Ammonia is then expelled with the assistance of a general acid group that traps an initially expelled NH3 as the final NH+4 product. In agreement with the function of the general acid …
Intersubband Lasing Lifetimes Of Sige/Si And Gaas/Algaas Multiple Quantum Well Structures, Greg Sun, L. Friedman, Richard A. Soref
Intersubband Lasing Lifetimes Of Sige/Si And Gaas/Algaas Multiple Quantum Well Structures, Greg Sun, L. Friedman, Richard A. Soref
Physics Faculty Publications
The feasibility of population inversion is studied for the SiGe/Si system and compared with that of GaAs/AlGaAs. Because of the absence of strong polar optical phonon scattering in SiGe/Si, the lifetime difference of the upper and lower lasing levels, to which the population inversion and laser gain are proportional, is consistently an order of magnitude larger than that of GaAs/AlGaAs; nor does it show the sudden drop to zero or negative values when the lasing energy exceeds the optical phonon energy. Both systems studied are superlattices, each period of which consists of three coupled quantum wells and barriers.
Nanosubharmonics: The Dynamics Of Small Nonlinear Contacts, Nancy Burnham, A Kulik, G Gremaud, Gad Briggs
Nanosubharmonics: The Dynamics Of Small Nonlinear Contacts, Nancy Burnham, A Kulik, G Gremaud, Gad Briggs
Nancy A. Burnham
We observed the generation of subharmonics and chaos in a nanometer-sized mechanical contact. To first order, the behavior matches that of macroscopic systems, with some intriguing secondary differences. As the occurrence of periodic behavior (subharmonics) is related to the coefficient of restitution, it may be possible to image local energy dissipation with nanometer resolution.
Areal And Vertical Distribution Of Total Soil Mercury And Total Phosphorusin The Southern Half Of Water Conservation Area 3-A, Everglades, Southern Florida, Cleone Botelho Arfstrom
Areal And Vertical Distribution Of Total Soil Mercury And Total Phosphorusin The Southern Half Of Water Conservation Area 3-A, Everglades, Southern Florida, Cleone Botelho Arfstrom
FIU Electronic Theses and Dissertations
Total soil-mercury and phosphorus concentrations were determined in 64 sites in the southern half of Water Conservation Area 3A, an area of approximately 500 km2 . Surface soil-Hg concentrations ranged from 117 to 300 ng-g-1;
total phosphorus concentrations range from 350 to 850 pg~g-1. No consistent north-south or east-west trends are found in the mercury or phosphorus surface concentrations when they are normalized to soil bulk density. Nine sites were used for the determination of the vertical distribution of soilmercury. Vertical profiles of soil-Hg revealed decreasing concentrations with depth and correlated well with phosphorus in …
Simultaneous Determination Of Fe 3p Spin-Orbit And Exchange Splittings In Photoemission, D. J. Huang, D. Mark Riffe, J. L. Erskine
Simultaneous Determination Of Fe 3p Spin-Orbit And Exchange Splittings In Photoemission, D. J. Huang, D. Mark Riffe, J. L. Erskine
All Physics Faculty Publications
Spin-resolved core-level photoemission data from the 3p level of ultrathin Fe films [1.4–5.1 monolayers (ML)] epitaxially grown on W(110) have been obtained. A nonlinear least-squares analysis, based on a one-particle Hamiltonian that simultaneously includes core-valence exchange and core-hole spin-orbit interactions, is developed. It is first tested on Fe 2p magnetic circular dichroism (MCD) photoemission spectra and shown to successfully describe the MCD asymmetry data. The model is then used to analyze our thin-film 3p data. With increasing film thickness the spin-orbit splitting (0.67±0.02 eV) remains constant (as expected), the exchange splitting increases from 0±0.12 eV to 0.41±0.05 eV, the average …
Conservation At The Zuni Pueblo: Lessons In Sustainability, James E. Enote
Conservation At The Zuni Pueblo: Lessons In Sustainability, James E. Enote
Sustainable Use of the West's Water (Summer Conference, June 12-14)
7 pages.
Contains references.
Regional Water Planning In New Mexico: An Opportunity For Citizen Involvement In State Government, Lucy Moore
Regional Water Planning In New Mexico: An Opportunity For Citizen Involvement In State Government, Lucy Moore
Sustainable Use of the West's Water (Summer Conference, June 12-14)
12 pages.
Contains references.
The Oregon Watershed Health Program: Local Empowerment To Restore Watersheds, Mary Lou Soscia
The Oregon Watershed Health Program: Local Empowerment To Restore Watersheds, Mary Lou Soscia
Sustainable Use of the West's Water (Summer Conference, June 12-14)
9 pages.
Washington State Initiatives For Sustainable Water Use, Kenneth O. Slattery
Washington State Initiatives For Sustainable Water Use, Kenneth O. Slattery
Sustainable Use of the West's Water (Summer Conference, June 12-14)
8 pages.
Managing Reclamation Facilities For Ecosystem Benefits, Lawrence J. Macdonnell
Managing Reclamation Facilities For Ecosystem Benefits, Lawrence J. Macdonnell
Sustainable Use of the West's Water (Summer Conference, June 12-14)
26 pages.
Contains references.
Searching For Sustainable Use Of Montana’S Water: A Series Of Vignettes, Matthew Mckinney
Searching For Sustainable Use Of Montana’S Water: A Series Of Vignettes, Matthew Mckinney
Sustainable Use of the West's Water (Summer Conference, June 12-14)
24 pages.
Contains references.
The Debate: Are Water Rights And Sustainable Water Use Compatible?, Stuart L. Somach
The Debate: Are Water Rights And Sustainable Water Use Compatible?, Stuart L. Somach
Sustainable Use of the West's Water (Summer Conference, June 12-14)
12 pages.
Contains footnotes and references.
Water Rights And The Commonwealth, Eric T. Freyfogle
Water Rights And The Commonwealth, Eric T. Freyfogle
Sustainable Use of the West's Water (Summer Conference, June 12-14)
20 pages.
The Distribution Of Naturally Occurring Soil Radionuclides And Radon Potential Of Northwest Oregon, Stuart Graham Ashbaugh
The Distribution Of Naturally Occurring Soil Radionuclides And Radon Potential Of Northwest Oregon, Stuart Graham Ashbaugh
Dissertations and Theses
Radon, a naturally occurring radioactive gas produced as one of the decay products of soil/rock uranium and thorium, is considered to be a leading cause of pulmonary disease. Gamma spectrometry of 146 samples of soil were used to quantify radon source potential relative to lithology by measuring Bi214 activity of the U238 decay series. Additional soil radio nuclide data (Th232, Ac228, K40 and C137 ) were used to help identify regional source provenance geochemistry and soil development. Ac228, Bi214 and Th232 activities in northwest Oregon soils range from five …
Sustainable Use Of The Denver Basin, Charles B. White
Sustainable Use Of The Denver Basin, Charles B. White
Sustainable Use of the West's Water (Summer Conference, June 12-14)
20 pages.
Contains footnotes.
A Response To Kansas V. Colorado: Sustainable Use Of The Arkansas River, David L. Harrison
A Response To Kansas V. Colorado: Sustainable Use Of The Arkansas River, David L. Harrison
Sustainable Use of the West's Water (Summer Conference, June 12-14)
17 pages (includes 1 folded map).
Restoring The Rio Grande—What Will It Take?, Denise Fort
Restoring The Rio Grande—What Will It Take?, Denise Fort
Sustainable Use of the West's Water (Summer Conference, June 12-14)
18 pages.
Contains 1 page of references.
The Henry’S Fork: Finding Mutual Interest In The Watershed, Janice M. Brown, Dale L. Swensen
The Henry’S Fork: Finding Mutual Interest In The Watershed, Janice M. Brown, Dale L. Swensen
Sustainable Use of the West's Water (Summer Conference, June 12-14)
9 pages.
Contains references.
A Meeting Of Opposites—Is Sustainable Use Of The Columbia River Possible?, John M. Volkman
A Meeting Of Opposites—Is Sustainable Use Of The Columbia River Possible?, John M. Volkman
Sustainable Use of the West's Water (Summer Conference, June 12-14)
47 pages.
Contains footnotes.
Speculating On The Denver Basin, Robert E. Brogden
Speculating On The Denver Basin, Robert E. Brogden
Sustainable Use of the West's Water (Summer Conference, June 12-14)
20 pages (includes illustrations and 1 map).
Contains footnotes.
Synthesis And Characterization Of A Porphyrin Dyad, Dale A. Braden
Synthesis And Characterization Of A Porphyrin Dyad, Dale A. Braden
Dissertations and Theses
The sun is a bountiful source of energy for our planet. .With the advent of photovoltaic cells, man has begun harnessing the sun's radiant energy, turning it into a form more directly useful: electricity. Commercially available solar cells currently operate at about 13% efficiency, sufficiently high to make them a viable source of electrical energy. It is of great interest, however, to improve their conversion efficiency, and to lower the cost of production so as to make them more economical, and thereby reduce our dependence upon traditional "dirty" sources of energy such as coal and oil. It has been found …
Evidence For A Supercritical ‘Transition’ To The Isotropic Phase In A Highly Chiral Liquid Crystal, Z. Kutnjak, C. W. Garland, John Loren Passmore , '94, Peter J. Collings
Evidence For A Supercritical ‘Transition’ To The Isotropic Phase In A Highly Chiral Liquid Crystal, Z. Kutnjak, C. W. Garland, John Loren Passmore , '94, Peter J. Collings
Physics & Astronomy Faculty Works
The results of two independent experiments in the vicinity of the “transition” from the third blue phase (BPIII) to isotropic phase (I) are reported for a highly chiral liquid crystal. Heat capacity measurements using a high-resolution calorimeter and dynamic light-scattering measurements using circularly polarized light have been performed. The data show a continuous evolution of BPIII into I with no critical fluctuations. This is strong evidence that the BPIII-I transition in this compound is supercritical, indicating that the BPIII and I phases possess the same macroscopic symmetry.
Agenda: Sustainable Use Of The West's Water, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Sustainable Use Of The West's Water, University Of Colorado Boulder. Natural Resources Law Center
Sustainable Use of the West's Water (Summer Conference, June 12-14)
Conference organizers and/or faculty included University of Colorado School of Law professors David H. Getches, Lawrence J. MacDonnell, Teresa A. Rice, Elizabeth A. Rieke and Charles F. Wilkinson.
Sustainable development is on the policy agenda for the '90s. What does sustainability mean? Is it a realistic concept? Are water rights compatible with sustainable use? The Center's 16th annual summer conference will explore the meaning of sustainability in the context of the West's demands, development, and natural values. Presentations by leading experts will address the broad concept of sustainable development, with a particular look at Arizona's experience. The focus will be …
Sustainability: Myth And Reality, Kai Lee
Sustainability: Myth And Reality, Kai Lee
Sustainable Use of the West's Water (Summer Conference, June 12-14)
23 pages (includes illustrations).
Contains references.
Politics, Engineering And Aridity—Sustainable Use Of Water In Arizona, Michael J. Brophy
Politics, Engineering And Aridity—Sustainable Use Of Water In Arizona, Michael J. Brophy
Sustainable Use of the West's Water (Summer Conference, June 12-14)
26 pages (includes illustrations).
Supercritical Conversion Of The 3rd Blue Phase To The Isotropic-Phase In A Highly Chiral Liquid-Crystal, Z. Kutnjak, C. W. Garland, J. Loren Passmore, Peter J. Collings
Supercritical Conversion Of The 3rd Blue Phase To The Isotropic-Phase In A Highly Chiral Liquid-Crystal, Z. Kutnjak, C. W. Garland, J. Loren Passmore, Peter J. Collings
Physics & Astronomy Faculty Works
The results of two independent experiments in the vicinity of the “transition” from the third blue phase ( BPIII) to isotropic phase ( I) are reported for a highly chiral liquid crystal. Heat capacity measurements using a high-resolution calorimeter and dynamic light-scattering measurements using circularly polarized light have been performed. The data show a continuous evolution of BPIII into I with no critical fluctuations. This is strong evidence that the BPIII-I transition in this compound is supercritical, indicating that the BPIII and I phases possess the same macroscopic symmetry.
Sustainable Use Of Natural Resources: A Native American Perspective, Ted Strong
Sustainable Use Of Natural Resources: A Native American Perspective, Ted Strong
Sustainable Use of the West's Water (Summer Conference, June 12-14)
27 pages.
Contains footnotes.
Is Sustainable Agriculture Possible In The Arid West?: The Example Of The Ogallala Aquifer, John Opie
Is Sustainable Agriculture Possible In The Arid West?: The Example Of The Ogallala Aquifer, John Opie
Sustainable Use of the West's Water (Summer Conference, June 12-14)
16 pages.
Contains 2 pages of references.
Arizona Water Management: New Problems And New Solutions, Herb Dishlip
Arizona Water Management: New Problems And New Solutions, Herb Dishlip
Sustainable Use of the West's Water (Summer Conference, June 12-14)
12 pages.