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  • 1
    Electronic Resource
    Electronic Resource
    Oxidation Stability of Tetraethyllead and Leaded Aviation Gasolines (1949)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 41 (1949), S. 907-914 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50473a008
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  • 2
    Electronic Resource
    Electronic Resource
    Properties of Pure Normal Alkanes in the C17 to C36 Range (1955)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 77 (1955), S. 2017-2019 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01612a097
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  • 3
    Electronic Resource
    Electronic Resource
    Diurnal variation in the temperature response of leaf extension of two bunchgrass species in the field (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 15 (1992), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The effect of temperature on short-term leaf extension rates was studied for two cool-season tussok grasses, Agropyron desertorum and Pseudoroegneria spicata, growing in the field under a variety of water stress and defoliation conditions. Leaf extension rates and air temperatures were monitored every half hour during numerous 12- to 65-h periods in three growing seasons using auxanometers constructed of precision resistors. For both species, a three-phase relationship between leaf extension rate and temperature was observed during diurnal cycles. Leaf extension rate increased linearly with temperature from dawn until midday (phase 1). Leaf extension then increased rapidly, reaching maximum rates in the early evening (approximately 1900h), despite decreasing temperatures during this period (phase 2). Finally, leaf extension rate declined with temperature from evening until dawn (phase 3). This diurnal cycle was described by linear (phase 1) and quadratic (phases 2 and 3 combined) regression models. Although the rate of leaf extension and daily integrals were affected by the water stress and defoliation treatments, the diurnal pattern was consistently observed. Temperature was probably a major factor governing leaf extension rates at night (phase 3), but it appeared unimportant in controlling leaf extension between dawn and midday. The relative importance of physiological and environmental factors controlling leaf extension rate appears to shift during the day in these species under field conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1992.tb02154.x
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  • 4
    Electronic Resource
    Electronic Resource
    Similarity of maize and sorghum genomes as revealed by maize RFLP probes (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 10-16 
    Details
    ISSN: 1432-2242
    Keywords: Sorghum ; Restriction Fragment Length Polymorphism ; Genetic maps ; Genomic structure ; Maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Densely saturated genetic maps of neutral genetic markers are a prerequisite either for plant breeding programs to improve quantitative traits in crops or for evolutionary studies. cDNA and genomic clones from maize were utilized to initiate the construction of a RFLP linkage map in Sorghum bicolor. To this purpose, an F2 population was produced from starting parental lines IS 18729 (USA) and IS 24756 (Nigeria) that were differentiated with regard to many morphological and agronomical traits. A total of 159 maize clones were hybridized to the genomic DNA of the two parents in order to detect polymorphism: 154 probes hybridized to sorghum and 58 out of these were polymorphic. In almost all of the cases hybridization patterns were similar between maize and sorghum. The analysis of the segregation of 35 polymorphic clones in an F2 population of 149 individuals yielded five linkage groups. The three principal ones recall regions of maize chromosomes 1, 3 and 5: in general, colinearity was maintained. A possible inversion, involving a long region of maize chromosome 3, was detected. Simulations were also performed to empirically obtain a value for the lowest number of individuals of the F2 population needed to obtain the same linkage data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223975
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  • 5
    Electronic Resource
    Electronic Resource
    Fifty new microsatellite loci for the wheat genetic map (1998)
    Springer
    Theoretical and applied genetics 97 (1998), S. 946-949 
    Details
    ISSN: 1432-2242
    Keywords: Key words Wheat ; Microsatellite markers ; Genetic map
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Hexaploid bread wheat (Triticum aestivum) has low levels of RFLP. Simple sequence repeats, however, show high levels of polymorphism and are therefore especially useful in intervarietal breeding applications. We present 53 newly mapped microsatellite loci for the wheat genetic map, 41 primary loci and 12 additional loci from these same primer pairs. Markers have been accredited with a quality score on a scale of 1–5 which describes the complexity of the amplification product profile from each primer pair.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050975
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  • 6
    Electronic Resource
    Electronic Resource
    Analysis of recombination rate in female and male gametogenesis in pearl millet (Pennisetum glaucum) using RFLP markers (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 242-246 
    Details
    ISSN: 1432-2242
    Keywords: Pennisetum glaucum ; RFLP analysis Recombination rate ; Segregation distortion ; Genetic mechanisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sex as a factor affecting recovered recombination in plant gametes was investigated in pearl millet, Pennisetum glaucum, by using reciprocal three-way crosses [(AxB)xCvCx(A x B)]. The two populations were mapped at 42 loci pre-selected to cover the majority of the genome. No differences in recombination distances were observed at the whole-genome level and only a few individual linkage intervals were found to differ, all in favour of increased recombination through the male. Distorted segregations found in the three-way crosses provide evidence of post-gametic selection for particular gene(s) or chromosome regions. The significance of these results for the design of pearl millet breeding programmes and inheritance experiments, as well as for other experimental strategies, is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222208
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  • 7
    Electronic Resource
    Electronic Resource
    An RFLP-based genetic map of pearl millet (Pennisetum glaucum) (1994)
    Springer
    Theoretical and applied genetics 89 (1994), S. 481-487 
    Details
    ISSN: 1432-2242
    Keywords: Pearl millet ; RFLP ; Translocation Genetic maps
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Analysis of a sample of diverse pearl millet genotypes with 200 genomic DNA probes revealed this crop species to be extremely polymorphic. Among these genotypes, 85% of probes detected polymorphism using only two restriction enzymes, with an average pair-wise polymorphism between all of the probe-enzyme combinations of 56%. Two crosses were employed to construct an RFLP-based genetic map. In an intervarietal F2 population, derived from a single F1 plant, 181 loci were placed on a linkage map. The total length of this map, which comprised seven linkage groups, was 303 cM and the average map distance between loci was about 2 cM, although a few intervals in excess of 10 cM were present at the ends of a few linkage groups. Very few clones, including those which hybridized to more than one copy, detected more than one locus in the pearl millet genome. The analysis was complicated initially because 83 of the 181 loci mapped to a single linkage group. Analysis of a second cross identified a probable translocation breakpoint in the middle of this large linkage group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225384
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  • 8
    Electronic Resource
    Electronic Resource
    Influence of clipping and soil water status on vesicular-arbuscular mycorrhizae of two semi-arid tussock grasses (1989)
    Springer
    Biology and fertility of soils 8 (1989), S. 285-289 
    Details
    ISSN: 1432-0789
    Keywords: Agropyron desertorum ; A. spicatum ; Tussock grasses ; Clipping ; Moisture ; Mycorrhizae ; Glomus fasciculatum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Using two tussock grasses, Agropyron desertorum, a grazing-tolerant species, and A. spicatum, a grazing-sensitive species, we measured the responses of vesicular-arbuscular mycorhizae (VAM) to clipping and soil moisture status. The clipping was carried out over a 4-year period (1982–1985). For the soil moisture × clipping studies, a rainout shelter was used to create drought stress, and irrigation was used to create high moisture conditions over a 2-year period (1984 – 1985). No consistent patterns in VAM infection frequency and VAM fungal spore counts were observed, either between species or among treatments. Increased moisture tended to increase total root and total VAM length, but there were no consistent moisture × clipping effects. Nor did the phenology of the fungus follow consistent patterns: there were similar lengths of root containing vesicles and arbuscules in 1984, and predominantly vesicles in 1985. The greatest effect was a large difference in VAM activity between years regardless of treatment, despite our attempts to use extreme environmental conditions and a rigorous sampling design. The VAM of both plant species were highly correlated. We postulate that VAM are highly plastic and that they respond to environmental pressures that we do not yet understand.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263155
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  • 9
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    Oxidation Stability of Tetraethyllead and Leaded Aviation Gasolines (1949)
    American Chemical Society
    Details
    Publication Date: 1949-05-01
    Print ISSN: 0019-7866
    Electronic ISSN: 1541-5724
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by American Chemical Society
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  • 10
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    Different canopy openings affect underground traits in herbaceous plants of a southern forest in Patagonia (2016)
    Oxford University Press
    Details
    Publication Date: 2016-09-21
    Description: Aims Forest canopy openings modify the natural environment, producing changes in light quality and intensity, precipitation and temperature. In turn, these changes promote the acclimation of understory species. However, little work has been done on underground responses to those environmental changes. The objective of this work was to determine how Osmorhiza depauperata , Phleum alpinum and Poa pratensis change its root length density and root colonization by mycorrhiza as a function of light availability in a Nothofagus pumilio (i.e. lenga) forest harvested following the variable retention prescription. Methods We selected three microenvironments in an old growth forest harvested by the variable retention prescription: aggregated retention, dispersed retention with influence of aggregated retention and dispersed retention. A non-harvested primary forest (PF), similar to the harvested one, was used as a control. Every 2 months, from October 2008 to April 2009, we took soil cores from randomly selected plants. From these soil cores, root length density and colonization percentage (CP) by arbuscular mycorrhizae were estimated. Important Findings Light availability changed significantly among the microenvironments. In general, root length density was significantly greater in P. pratensis than in P. alpinum and both species greater than in O. depauperata . Light availability increased root length density in all species, although the magnitude of these increases difference among species. Root length density was 187% greater in P. pratensis , 101% in P. alpinum and 94% in O. depauperata in the disperse retention system than in the PF. Mycorrhiza CP was higher in O. depauperata than in P. alpinum and P. pratensis . Also, it was lower in the PF than in the harvested microenvironments. CPs were very low.
    Print ISSN: 1752-993X
    Electronic ISSN: 1752-9921
    Topics: Biology
    Published by Oxford University Press
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