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Quantification of Absorption, Retention and Elimination of Two Different Oral Doses of Vitamin a in Zambian Boys Using Accelerator Mass Spectrometry
A recent survey indicated that high-dose vitamin A supplements (HD-VAS) had no apparent effect on vitamin A (VA) status of Zambian children <5 y of age. To explore possible reasons for the lack of response to HD-VAS among Zambian children, we quantified the absorption, retention, and urinary elimination of either a single HDVAS (60 mg) or a smaller dose of stable isotope (SI)-labeled VA (5 mg), which was used to estimate VA pool size, in 3-4 y old Zambian boys (n = 4 for each VA dose). A 25 nCi tracer dose of [{sup 14}C{sub 2}]-labeled VA was co-administered with the HD-VAS or SI-labeled VA, and 24-hr stool and urine samples were collected for 3 and 7 consecutive days, respectively, and 24-hr urine samples at 4 later time points. Accelerator Mass Spectrometry (AMS) was used to measure the cumulative excretion of {sup 14}C in stool and urine 3d after dosing to estimate, respectively, absorption and retention of the VAS and SI-labeled VA. The urinary elimination rate (UER) was estimated by plotting {sup 14}C in urine vs. time, and fitting an exponential equation to the data. Estimates of mean absorption, retention and the UER were 83.8 {+-} 7.1%, 76.3 {+-} 6.7%, …
Date:
October 12, 2009
Creator:
Aklamati, E. K.; Mulenga, M.; Dueker, S. R.; Buchholz, B. A.; Peerson, J. M.; Kafwembe, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Final Report - "UCM-Grid Service for User-Centric Monitoring"
The User Centric Monitoring (UCM) project was aimed at developing a toolkit that provides the Virtual Organization (VO) with tools to build systems that serve a rich set of intuitive job and application monitoring information to the VO's scientists so that they can be more productive. The tools help collect and serve the status and error information through a Web interface. The proposed UCM toolkit is composed of a set of library functions, a database schema, and a Web portal that will collect and filter available job monitoring information from various resources and present it to users in a user-centric view rather than and administrative-centric point of view.
Date:
November 12, 2009
Creator:
Alexander, David A.
Object Type:
Report
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 27, No. 6, Ed. 1 Thursday, February 12, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
February 12, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 27, No. 10, Ed. 1 Thursday, March 12, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
March 12, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 29, No. 45, Ed. 1 Thursday, November 12, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
November 12, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Modeling Windows in Energy Plus with Simple Performance Indices
The building energy simulation program, Energy Plus (E+), cannot use standard window performance indices (U, SHGC, VT) to model window energy impacts. Rather, E+ uses more accurate methods which require a physical description of the window. E+ needs to be able to accept U and SHGC indices as window descriptors because, often, these are all that is known about a window and because building codes, standards, and voluntary programs are developed using these terms. This paper outlines a procedure, developed for E+, which will allow it to use standard window performance indices to model window energy impacts. In this 'Block' model, a given U, SHGC, VT are mapped to the properties of a fictitious 'layer' in E+. For thermal conductance calculations, the 'Block' functions as a single solid layer. For solar optical calculations, the model begins by defining a solar transmittance (Ts) at normal incidence based on the SHGC. For properties at non-normal incidence angles, the 'Block' takes on the angular properties of multiple glazing layers; the number and type of layers defined by the U and SHGC. While this procedure is specific to E+, parts of it may have applicability to other window/building simulation programs.
Date:
October 12, 2009
Creator:
Arasteh, Dariush; Kohler, Christian & Griffith, Brent
Object Type:
Report
System:
The UNT Digital Library
Measurement of Time-Dependent CP Asymmetry in B0->ccbar K(*)0 Decays
The authors present updated measurements of time-dependent Cp asymmetries in fully reconstructed neutral B decays containing a charmonium meson. The measurements reported here use a data sample of (465 {+-} 5) x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric energy e{sup +}e{sup -} storage rings operating at the SLAC National Accelerator Laboratory. The time-dependent CP asymmetry parameters measured from J/{psi} K{sub S}{sup 0}, J/{psi}K{sub L}{sup 0}, {psi}(2S)K{sub S}{sup 0}, {eta}{sub c}K{sub S}{sup 0}, {chi}{sub c1}K{sub S}{sup 0} and J/{psi} K*(892){sup 0} decays are: C{sub f} = 0.024 {+-} 0.020(stat) {+-} 0.016(syst) and -{eta}{sub f}S{sub f} = 0.687 {+-} 0.028(stat) {+-} 0.012(syst).
Date:
February 12, 2009
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Search for the Z(4430) at BABAR
We report the results of a search for Z(4430){sup -} decay to J/{psi}{pi}{sup -} or {psi}(2S){pi}{sup -} in B{sup -,0} {yields} J/{psi}{pi}{sup -} K{sup 0,+} and B{sup -,0} {yields} {psi}(2S){pi}{sup -}K{sup 0,+} decays. The data were collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e{sup +}e{sup -} collider operating at center of mass energy 10.58 GeV, and the sample corresponds to an integrated luminosity of 413 fb{sup -1}. Each K{pi}{sup -} mass distribution exhibits clear K*(892) and K*{sub 2}(1430) signals, and the efficiency-corrected spectrum is well-described by a superposition of the associated Breit-Wigner intensity distributions, together with an S-wave contribution obtained from the LASS I = 1/2 K{pi}{sup -} scattering amplitude measurements. Each K{pi}{sup -} angular distribution varies significantly in structure with K{pi}{sup -} mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/{psi}{pi}{sup -} or {psi}(2S){pi}{sup -} mass distribution is well-described by the reflection of the measured K{pi}{sup -} mass and angular distribution structures. We see no significant evidence for a Z(4430){sup -} signal for any of the processes investigated, neither in the total J/{psi}{pi}{sup -} or {psi}(2S){pi}{sup -} mass distribution, nor in the corresponding distributions for the regions of K{pi}{sup …
Date:
January 12, 2009
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Measurements of time-dependent CP asymmetries in B0 --> D(*)+D(*)- decays
We present new measurements of time-dependent CP asymmetries for B{sup 0} {yields} D{sup (*)+}d{sup (*)-} decays using (467 {+-} 5) x 10{sup 6} B{bar B} pairs collected with the BABAR detector located at the PEP-II B Factory at the Stanford Linear Accelerator Center. We determine the CP-odd fraction of the B{sup 0} {yields} D*{sup +}D*{sup -} decays to be R{perpendicular} = 0.158 {+-} 0.028 {+-} 0.006 and find CP asymmetry parameters for the CP-even component of the decay S{sub +} = -0.76 {+-} 0.16 {+-} 0.04 and C{sub +} = 0.00 {+-} 0.12 {+-} 0.02. We measure S = -0.63{+-}0.36{+-}0.05 and C = -0.07{+-}0.23{+-}0.03 for B{sup 0} {yields} D{sup +}D{sup -}, S = -0.62{+-}0.21{+-}0.03 and C = 0.08 {+-} 0.17 {+-} 0.04 for B{sup 0} {yields} D*{sup +}D{sup -}, and S = -0.73 {+-} 0.23 {+-} 0.05 and C = 0.00 {+-} 0.17 {+-} 0.03 for B{sup 0} {yields} D{sup +}D*{sup -}. For the B{sup 0} {yields} D*{sup {+-}}D{sup {-+}} decays, we also determine the CP-violating asymmetry A = 0.008 {+-} 0.048 {+-} 0.013. In each case, the first uncertainty is statistical and the second is systematic. The measured values for the asymmetries are all consistent with the Standard Model.
Date:
February 12, 2009
Creator:
Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Development of Cu-64 labeled EGF for In Vivo PET Imaging of EGFR Expression
In this project we proposed to establish feasibility of the development of targeted tracers for radionuclide imaging of epidermal growth factor receptors (EGFR) in cancer patients. The significance and impact of the proposed radiotracers are determined by the crucial role that EGFR plays in many cancers and by the rapid entrance of EGFR-inhibiting drugs into clinic. Clinical experience, however, revealed that only 10-25% of patients that are defined as EGFR-positive by immunohistochemical analysis respond to EGFR-directed therapeutics and there is poor correlation between EGFR immunohistochemistry and treatment. Therefore, for more efficacious use of EGFR-targeting therapeutics, there is a need for information about EGFR activity in patients. We hypothesized that radionuclide imaging of functionally active EGFR will provide such information and would allow for 1) rational patient stratification, 2) rapid monitoring of responses to therapy, and 3) development of personalized treatment regimens. We hypothesized that tracers based epidermal growth factor (EGF), a natural EGFR ligand, as a targeting vector would be particularly advantageous. First, only functionally active and therefore critical for disease progression EGFRs will bind and internalize an EGF-based tracer. Second, continuous internalization of EGF-based tracers by recyclable EGFR would lead to intracellular accumulation of radionuclide and improved signal-to-background ratio. …
Date:
July 12, 2009
Creator:
Backer, Joseph M.
Object Type:
Report
System:
The UNT Digital Library
Proliferation Risk Reduction Study of Alternative Spent Fuel Processing
This paper presents the results of an evaluation of the relative proliferation risks of particular reprocessing technologies focusing on COEX, UREX+, and pyroprocessing
Date:
July 12, 2009
Creator:
Bari, R. A.; Phillips, J.; Pilat, J.; Rochau, G.; Therios, I.; Wigeland, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Impacts of Standard 90.1-2007 for Commercial Buildings at State Level
This report examines the requirements of Standard 90.1-2007 on commercial buildings on a state-by-state basis with a separate, stand-alone chapter for each state. Standard 90.1-2007 is compared to the current state code for most states. This is the final version of the draft previously cleared and assigned ERICA # PNNL-18544, titled "Commercial Nationwide Report."
Date:
October 12, 2009
Creator:
Bartlett, Rosemarie; Halverson, Mark A. & Gowri, Krishnan
Object Type:
Report
System:
The UNT Digital Library
Occam's Razor and Petascale Visual Data Analysis
One of the central challenges facing visualization research is how to effectively enable knowledge discovery. An effective approach will likely combine application architectures that are capable of running on today?s largest platforms to address the challenges posed by large data with visual data analysis techniques that help find, represent, and effectively convey scientifically interesting features and phenomena.
Date:
June 12, 2009
Creator:
Bethel, E. Wes; Johnson, Chris; Ahern, Sean; Bell, John; Bremer, Peer-Timo; Childs, Hank et al.
Object Type:
Article
System:
The UNT Digital Library
Monitoring applications once they are in the user community
Once an application is released into the user community, obtaining prompt and high quality information on application usage, applicability and reliability can be a challenge. Most Linux and Solaris applications used at RHIC and associated accelerators have been instrumented so that application and crash information is gathered, stored and forwarded to the appropriate developer for immediate analysis. To support this process, databases were created to track developer and application information. In order to keep these databases relevant, a web based application release procedure was created to collect information and automatically update the database. Additional capabilities have been developed that utilize and expand on the various components of this system to promote communication between developers and users, and to monitor applications. An application feedback feature allows users to instantly communicate with application developers. An application history system records application usage and reliability.
Date:
October 12, 2009
Creator:
Binello, S.
Object Type:
Article
System:
The UNT Digital Library
Afghanistan: Narcotics and U.S. Policy
This report provides current statistical information, profiles the Afghanistan narcotics trade's participants, explores linkages between narcotics, insecurity, and corruption, and reviews U.S. and international policy responses since late 2001. The report also considers ongoing policy debates regarding the counternarcotics role of coalition military forces, poppy eradication, alternative livelihoods, and funding issues for Congress.
Date:
August 12, 2009
Creator:
Blanchard, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
The United Nations Convention on the Rights of the Child: Background and Policy Issues
This report provides an overview of the United Nations Convention of the Rights of the Child's (CRC) background and structure and examines evolving U.S. policy toward the Convention, including past and current Administration positions and congressional perspectives. It also highlights issues for the 112th Congress, including the Convention's possible impact on federal and state laws, U.S. sovereignty, parental rights, and U.S. family planning and abortion policy.
Date:
May 12, 2009
Creator:
Blanchfield, Luisa
Object Type:
Report
System:
The UNT Digital Library
THE REAL ISSUE WITH WALL DEPOSITS IN CLOSED FILTER CASSETTES - WHAT'S THE SAMPLE?
The measurement of aerosol dusts has long been utilized to assess the exposure of workers to metals. Tools used to sample and measure aerosol dusts have gone through many transitions over the past century. In particular, there have been several different techniques used to sample for beryllium, not all of which might be expected to produce the same result. Today, beryllium samples are generally collected using filters housed in holders of several different designs, some of which are expected to produce a sample that mimics the human capacity for dust inhalation. The presence of dust on the interior walls of cassettes used to hold filters during metals sampling has been discussed in the literature for a number of metals, including beryllium, with widely varying data. It appears that even in the best designs, particulates can enter the sampling cassette and deposit on the interior walls rather than on the sampling medium. The causes are not well understood but are believed to include particle bounce, electrostatic forces, particle size, particle density, and airflow turbulence. Historically, the filter catch has been considered to be the sample, but the presence of wall deposits, and the potential that the filter catch is not representative …
Date:
September 12, 2009
Creator:
Brisson, M.
Object Type:
Article
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 30, Ed. 1 Thursday, February 12, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 12, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 50, Ed. 1 Thursday, March 12, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 12, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 93, Ed. 1 Tuesday, May 12, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 12, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 116, Ed. 1 Friday, June 12, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 12, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 158, Ed. 1 Wednesday, August 12, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 12, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 181, Ed. 1 Saturday, September 12, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 12, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 221, Ed. 1 Thursday, November 12, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 12, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History