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  • Astronomy  (31)
  • INSTRUMENTATION AND PHOTOGRAPHY  (4)
  • Barley  (2)
  • Bone mineral  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Age changes in bone mineralization, cortical thickness, and Haversian canal area (1980)
    Springer
    Calcified tissue international 31 (1980), S. 5-11 
    Details
    ISSN: 1432-0827
    Keywords: Absorptiometry ; Cortical thickness ; Bone mineral ; Haversian canal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Age-related changes in femoral cortical bone were quantified in an age-graded series of human cadavers. Variables included in this study were cortical thickness, bone mineral content, cortical bone density, summed Haversian canal area, Haversian canal number, and mean Haversian canal area. Females showed significant (P〈0.05) decreases in cortical thickness, bone mineral content, and cortical bone density when plotted against age. Males exhibited slight nonsignificant declines for cortical thickness, bone mineral content, and cortical bone density. Both males and females exhibited significant (P〈0.05) age-related increases in summed Haversian canal area values and Haversian canal number. Females as a group were found to exhibit significantly (P〈0.05) larger mean Haversian canal area values compared with males, but the male group exhibited more Haversian canals per unit area of cortical bone compared with females. Intercorrelations between the bone mineral index and summed Haversian canal area and between cortical bone density and summed Haversian canal area define the role of increasing Haversian canal number and mean canal size per unit area of cortical bone as a factor in the reduction of bone mass as a function of age. Partial correlations between the bone mass variables and the variables assessing Haversian canal size and number further support this argument.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407161
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of bone apatite in osteoporotic and normal Eskimos (1983)
    Springer
    Calcified tissue international 35 (1983), S. 392-393 
    Details
    ISSN: 1432-0827
    Keywords: Osteoporosis ; Infrared ; Bone mineral ; Bone resorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary An infrared and x-ray diffraction study of osteoporotic and normal, archaeological Eskimo bones. Osteoporotic bone apatite is greater in crystal size and/or perfection and lower in CO3 than normal bone apatite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405064
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  • 3
    Electronic Resource
    Electronic Resource
    The inheritance of genetic markers in microspore-derived plants of barley Hordeum vulgare L. (1991)
    Springer
    Theoretical and applied genetics 81 (1991), S. 487-492 
    Details
    ISSN: 1432-2242
    Keywords: Doubled haploids ; Microspore ; Isozymes ; RFLPs ; Barley
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Biochemical, molecular and morphological markers have been used to monitor the segregation of alleles at major gene loci in microspore-derived lines of four spring barley crosses and their parents. Significant deviations from the expected Mendelian ratios were observed for four of the ten markers studied in the cross. Distorted ratios were associated with loci located on chromosomes 4H and 6H. The differential transmission of alleles was in favour of the responsive parent (Blenheim) used in the anther culture studies. For the α-Amy-1 locus on chromosome 6H, the preferential transmission of Blenheim alleles was most pronounced in the haploid regenerants that were colchicine treated. These results are discussed in relation to the genetic control of androgenetic response in barley and with respect to the exploitation of another culture in barley improvement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219438
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  • 4
    Electronic Resource
    Electronic Resource
    Water-soluble proteins of mature barley endosperm: genetic control, polymorphism, and linkage with β-amylase and spring/winter habit (1991)
    Springer
    Theoretical and applied genetics 81 (1991), S. 787-792 
    Details
    ISSN: 1432-2242
    Keywords: Water-soluble protein (WSP) ; Barley ; β Amylase ; Linkage ; Spring/winter habit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Water-soluble proteins (WSP-2 and WSP-3) and β-amylase (β-AMY-1) were extracted from mature endosperms of 44 spring and 39 winter barley genotypes. The protein and enzyme isoforms were separated in isoelectric focusing gels with a pH gradient of 4–6.5. The Wsp-3 and β-Amy-1 loci were located to chromosomes 4H using the wheat/barley chromosome addition lines. Segregation analysis of F2 and doubled haploid populations showed Wsp-2 and β-Amy-1 to be tightly linked, with a map distance of 11 cMorgans. Isoforms of WSP-2 possessed similar pIs to that of WSP-3 and overlapping bands were observed in the gels. These bands segregated independently in F2 and doubled haploid populations, implying two unlinked genes. All three loci were found to be polymorphic: two alleles were detected at the Wsp-2 locus, three at Wsp-3 and two at β-Amy-1. The frequency of alleles at all three loci was found to be different in winter and spring genotypes. Spring genotypes possessed a wider range of phenotypes than winter genotypes. Spring and winter genotypes could be distinguished on the basis of WSP-3 and β- AMY-1 phenotypes. The linkage between Wsp-3 and β-Amy-1 loci and genes controlling spring/winter habit on chromosome 4H is discussed. It is concluded that Wsp-3 and β-Amy-1 can be used as genetic markers for spring/winter habit in barley genetic research and breeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224991
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  • 5
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    SAS-2 observations of gamma rays from the galactic plane (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Preliminary data are given for the SAS-2 high energy galactic gamma ray observation. These data include both latitude and longitude distributions. The longitude distribution shows a high density region. The latitude distributions toward the center and the anti-center are markedly different, the former showing a two-component structure of half-widths of approximately 3 and 6 deg. The energy spectrum in the range 35 to 200 MeV is hard, consistent with cosmic ray interactions with interstellar matter, including neutral pions decay and emission from energetic electron interactions. The data is consistent with an interpretation in terms of the confinement of the cosmic rays in the spiral arms.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ESRO The Context and Status of Gamma Ray Astronomy; p 201-204
    Format: text
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  • 6
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    Studying the High Energy Gamma Ray Sky with Gamma Ray Large Area Space Telescope (GLAST) (1998)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: Building on the success of the Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory, the Gamma Ray Large Area Space Telescope (GLAST) will make a major step in the study of such subjects as blazars, gamma Ray bursts, the search for dark matter, supernova remnants, pulsars, diffuse radiation, and unidentified high energy sources. The instrument will be built on new and mature detector technologies such as silicon strip detectors, low-power low-noise LSI, and a multilevel data acquisition system. GLAST is in the research and development phase, and one full tower (of 25 total) is now being built in collaborating institutes. The prototype tower will be tested thoroughly at Stanford Linear Accelerator Center (SLAC) in the fall of 1999.
    Keywords: Astronomy
    Format: application/pdf
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  • 7
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    Gamma Ray Large Area Space Telescope (GLAST) Balloon Flight Engineering Model: Overview (2001)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: The Gamma Ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT) is a pair-production high-energy (greater than 20 MeV) gamma-ray telescope being built by an international partnership of astrophysicists and particle physicists for a satellite launch in 2006, designed to study a wide variety of high-energy astrophysical phenomena. As part of the development effort, the collaboration has built a Balloon Flight Engineering Model (BFEM) for flight on a high-altitude scientific balloon. The BFEM is approximately the size of one of the 16 GLAST-LAT towers and contains all the components of the full instrument: plastic scintillator anticoincidence system (ACD), high-Z foil/Si strip pair-conversion tracker (TKR), CsI hodoscopic calorimeter (CAL), triggering and data acquisition electronics (DAQ), commanding system, power distribution, telemetry, real-time data display, and ground data processing system. The principal goal of the balloon flight was to demonstrate the performance of this instrument configuration under conditions similar to those expected in orbit. Results from a balloon flight from Palestine, Texas, on August 4, 2001, show that the BFEM successfully obtained gamma-ray data in this high-background environment.
    Keywords: Astronomy
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  • 8
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    Performance of the Anti-Coincidence Detector on the GLAST Large Area Telescope (2007)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: The Anti-Coincidence Detector (ACD), the outermost detector layer in the Gamma-ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT), is designed to detect and veto incident cosmic ray charged particles, which outnumber cosmic gamma rays by 3-4 orders of magnitude. The challenge in ACD design is that it must have high (0.9997) detection efficiency for singly-charged relativistic particles, but must also have a low probability for self-veto of high-energy gammas by backplash radiation from interactions in the LAT calorimeter. Simulations and tests demonstrate that the ACD meete its design requirements. The performance of the ACD has remained stable thrugh stand-alone environmental testing, shipment across the U.S. installation onto the LAT, shipment back across the U.S., LAT environmental testing, and shipment to Arizona. As part of the fully-assembled GLAST observatory, the ACD is being readied for final testing before launch.
    Keywords: Astronomy
    Type: AIP Conference Proceedings (The First GLAST Symposium) (ISSN 0094-243X); Volume 921; 588-589
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  • 9
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    The Anti-Coincidence Detector for the GLAST Large Area Telescope (2007)
    In:  CASI
    Details
    Publication Date: 2018-08-10
    Description: This paper describes the design, fabrication and testing of the Anti-Coincidence Detector (ACD) for the Gamma-ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT). The ACD is LAT's first-level defense against the charged cosmic ray background that outnumbers the gamma rays by 3-5 orders of magnitude. The ACD covers the top and 4 sides of the LAT tracking detector, requiring a total active area of -8.3 square meters. The ACD detector utilizes plastic scintillator tiles with wave-length shifting fiber readout. In order to suppress self-veto by shower particles at high gamma-ray energies, the ACD is segmented into 89 tiles of different sizes. The overall ACD efficiency for detection of singly charged relativistic particles entering the tracking detector from the top or sides of the LAT exceeds the required 0.9997.
    Keywords: Astronomy
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  • 10
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    High Efficiency Plastic Scintillator Detector with Wave-Length Shifting Fiber Readout for the GLAST Large Area Telescope (2007)
    In:  CASI
    Details
    Publication Date: 2018-08-10
    Description: This paper describes the design and performance studies of the scintillator tile detectors for the Anti-Coincidence Detector (ACD) of the Large Area Telescope (LAT) on the Gamma ray Large Area Space Telescope (GLAST), scheduled for launch in early 2008. The scintillator tile detectors utilize wavelength shifting fibers and have dual photomultiplier tube (PMT) readout. The design requires highly efficient and uniform detection of singly charged relativistic particles over the tile area and must meet all requirements for a launch, as well as operation in a space environment. We present here the design of three basic types of tiles used in the ACD, ranging in size from approx.450 sq cm to approx.2500 sq cm, all 1 cm thick, with different shapes, and with photoelectron yield of approx. 20 photoelectrons per minimum ionizing particle (mip) at normal tile incidence, uniform over the tile area. Some tiles require flexible clear fiber cables up to 1.5 m long to deliver scintillator light to remotely located PMT.
    Keywords: Astronomy
    Type: Meeting held on Oct. 1-5, 2007 in Moscow, Russia. To appear in the Journal of Nuclear Instruments and Methods, Elsevier
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