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  • INORGANIC AND PHYSICAL CHEMISTRY  (3)
  • 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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    Flame characteristics of a NASA contra swirler module (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The structure of unconfined flames stabilized on a NASA contra-swirl can has been examined. The structure depends on reference velocity and fuel-air ratio, and photographic illustrations of representative examples of each flame type are shown. A highly compact flame is obtained over a narrow band of fuel-air ratios, within the total range over which flames may be stabilized, at high reference velocity (27.8 m/s). The compact structure can only be obtained with careful fuel nozzle location. Chemical concentration profiles, temperature profiles and sodium chloride seeding experiments all confirm the visual impression of compactness. A flame with 50% greater fuel throughput has a much less compact structure, which is reflected in lower maximum temperature, much more complex chemical concentration distributions and a more diffuse recirculation boundary as observed by sodium chloride seeding than in the compact flame. Each of these flames has not only an evident axial recirculation core but also a toroidal recirculation region over the bluff region between the inner and outer swirlers. In contrast, laser Doppler velocimetry measurements carried out on a flame with lower reference velocity (5.65 m/s) do not indicate the presence of a secondary recirculation region in this flame.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Spring Technical Meeting; Mar 28, 1977 - Mar 30, 1977; Cleveland, OH
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    The effect of preheat on the structure of a swirl stabilized flame (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The effect of preheat on the temperature and species distributions in propane flames stabilized on a NASA contraswirl can has been examined. Flames with compact stable structure, inner-swirler airflow of 0.0091 kg/s, outer-swirler-plus-bypass airflow of 0.0203 kg/s, and propane injected 1 mm upstream of the inner swirler hub have been selected for detailed study. Over the inlet-air-temperature range from 300 to 673 K the maximum temperature in the flame increased by 40 to 60 K per 100-K increase in inlet air temperature. The point of maximum temperature on the center line approached the exit plane as inlet air temperature was increased. Oxygen, CO, H2, and methane were found together in gas samples taken from the flame, including the regions of maximum flame temperature.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: AIAA PAPER 78-28 , Aerospace Sciences Meeting; Jan 16, 1978 - Jan 18, 1978; Huntsville, AL
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Flame characteristics of a NASA contra swirler module (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Results are presented for an investigation of the structure of unconfined propane flames stabilized on a NASA contra-swirl can. General flame characterization, flame visualization by sodium chloride, temperature measurements, combustion products analysis, nitric oxide concentrations, and laser anemometer studies are considered. The results are discussed relative to sodium chloride visualization, temperature distributions, chemical composition of flames, nitric oxide distributions, and velocity distributions. It is shown that unconfined propane-air flames can be stabilized downstream of a NASA contra-swirl can under a wide range of airflow rates and fuel-air ratios. However, on increasing fuel input from the lowest at which flames can be stabilized, a compact recirculation zone-stabilized flame is formed. The effect of confinement on changes in flame shape and structure is determined.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: ASME PAPER 78-GT-163 , American Society of Mechanical Engineers, Gas Turbine Conference and Products Show; Apr 09, 1978 - Apr 13, 1978; London
    Format: text
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    NASA TECHNICAL REPORTS
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