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  • 2000-2004  (6)
  • 1970-1974  (3)
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  • 1
    Digitale Medien
    Digitale Medien
    Effect of lattice strain and defects on the superconductivity of MgB2 (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 4399-4401 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The influence of lattice strain and Mg vacancies on the superconducting properties of MgB2 samples has been investigated. High quality samples with sharp superconducting transitions were synthesized. The variations in lattice strain and Mg vacancy concentrations were obtained by varying the synthesis conditions. It was found that high strain (∼1%) and the presence of Mg vacancies (∼5%) resulted in lowering the Tc by only 2 K. © 2001 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1428109
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  • 2
    Digitale Medien
    Digitale Medien
    Variation in Minnesota HRS Wheats: Bran Content (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: : Bran content in both wheat-meal and flour was measured using an automated fluorescence microscopic imaging instrument, and correlated with milling extraction, ash content, and test weight values. Quantitative image analysis of the kernel bran content revealed differences in the linear response and slope, when plotted against test weight for common Minnesota HRS wheat varieties or a correlation coefficient of-0.818 for all HRS wheat samples (sample number = 65, p = 0.01). Whole-wheat bran and ash values also correlated significantly (p = 0.01) with the percent milling extraction (-0.927 and -0.687, respectively). The flour bran content was not significantly correlated with flour ash content (0.202).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb11360.x
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  • 3
    Digitale Medien
    Digitale Medien
    Spawning by lake sturgeon (Acipenser fulvescens) in the Detroit River (2004)
    Berlin, Germany : Blackwell Verlag GmbH
    Journal of applied ichthyology 20 (2004), S. 0 
    Details
    ISSN: 1439-0426
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Overfishing and habitat destruction in the early 1900s devastated lake sturgeon (Acipenser fulvescens) populations in the Great Lakes. Although a comprehensive restoration strategy for this species was recently drafted by the Michigan Department of Natural Resources, a lack of current data on Great Lakes sturgeon stocks has hindered rehabilitation efforts. Historically, the Detroit River supported one of the largest lake sturgeon populations in the Great Lakes; however, little is known about the current population or its habitat use. The main objective of this study was to determine if lake sturgeon spawns in the Detroit River. As part of a larger study, baited setlines were used to capture lake sturgeon in the Detroit River in the spring and summer of 2000 and 2001. In each year of the study, ultrasonic transmitters were surgically implanted in 10 adult fish to track their movements, evaluate habitat use and identify possible spawning sites. Using telemetry and egg mats to verify spawning activity, one spawning site was located and verified in the Detroit River. Spawning was verified by recovering sturgeon eggs deposited on egg collection mats anchored at the site. Telemetry data suggested that several other possible spawning sites also may exist, however, spawning activity was not verified at these sites.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1439-0426.2004.00499.x
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  • 4
    Digitale Medien
    Digitale Medien
    Evaluation of the feed value of a transgenic strain of the narrow-leaf lupin (Lupinus angustifolius) in the diet of the marine fish, Pagrus auratus (2003)
    Oxford, UK : Blackwell Science Ltd
    Aquaculture nutrition 9 (2003), S. 0 
    Details
    ISSN: 1365-2095
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: This study assessed the nutritional and biological value of a noncommercial, transgenic line of the Australian sweet lupin, Lupinus angustifolius, (cv. Warrah), produced to increase the methionine content of the seed. An initial experiment demonstrated that differences in the methionine content of the transgenic and nontransgenic control lupins had no apparent influence on the growth of juvenile red seabream fed practical diets. Re-evaluation of the nutritional characteristics of the lupin meals with subsequent digestibility studies allowed the determination of the digestible value of the protein and energy content of each of the varieties. The digestible protein content of either variety was similar, however significant differences in the digestible energy value of each variety existed (56.3% cf. 64.0%). This re-evaluation of the nutritional value of the genetically manipulated (GM) and non-GM lupin varieties enabled the reformulation of diets on a digestible protein and energy basis. A second growth trial was undertaken using sub-satietal pair-feeding regimes, with the experiment also involving protein-restrictive diets to allow expression of the differences in the methionine content of the transgenic and nontransgenic lupin meals. A significant benefit of the enhanced methionine level in the transgenic lupin was observed. It is argued that in the high-protein fish diets used, the importance of amino acid composition is relatively limited. Economic modelling of the potential value of the increased methionine in the transgenic lupin suggests that this will have limited benefit for aquaculture industries, and that greater value would be attributable to higher protein and energy levels in ingredients.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2095.2003.00247.x
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  • 5
    Digitale Medien
    Digitale Medien
    Nitrate Reductase and Glucose-6-phosphate Dehydrogenase Activities as Influenced by Leaf Age and Addition of Protein to Extraction Media (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 32 (1974), S. 0 
    Details
    ISSN: 1399-3054
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Lea fage influences the level of activity and the decay rate of the enzymes nitrate reductase (NR: E.C. 1.6.6.1) and glucose-6-phosphate dehydrogenase (G6PD; E.C. 1.1.1.49) extracted with and without protein in the extraction media. Such influence was determined in three plant species: corn (Zea mays L.), oats (Arena sativa L.), and tobacco (Nicotiana tabacum L.). Leaves of different ages were obtained from plants of various ages, or by removal of leaf blades from different positions on a single shoot. NR activity (per g fresh weight) declined as leaves of these plant species became older, especially when extraction was effected with conventional media (i.e. without added protein). The instability of NR in these extracts increased as leaves became older. Decay of NR in vitro was exponential with time. Addition of protein [3 %(w/v) casein or bovine serum albumin] to extraction media markedly increased the level of NR activity and its stability, especially in older leaves of all three plant species. Addition of protein did not affect the level of G6PD extracted from corn leaf blades, but slightly enhanced its activity in extracts from the oldest leaf blade of oats. G6PD activity also declined as leaf blades of corn and oats became older.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1399-3054.1974.tb03147.x
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  • 6
    Digitale Medien
    Digitale Medien
    AN ORGANIZED SIGNAL IN SNOWMELT RUNOFF OVER THE WESTERN UNITED STATES (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 36 (2000), S. 0 
    Details
    ISSN: 1752-1688
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie
    Notizen: : Daily-to-weekly discharge during the snowmelt season is highly correlated among river basins in the upper elevations of the central and southern Sierra Nevada (Carson, Walker, Tuolumne, Merced, San Joaquin, Kings, and Kern Rivers). In many cases, the upper Sierra Nevada watershed operates in a single mode (with varying catchment amplitudes). In some years, with appropriate lags, this mode extends to distant mountains. A reason for this coherence is the broad scale nature of synoptic features in atmospheric circulation, which provide anomalous insolation and temperature forcing that span a large region, sometimes the entire western U.S. These correlations may fall off dramatically, however, in dry years when the snowpack is spatially patchy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1752-1688.2000.tb04278.x
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  • 7
    Digitale Medien
    Digitale Medien
    Infrared heterodyne spectroscopy of CO 2 on Mars (1974)
    [s.l.] : Nature Publishing Group
    Nature 250 (1974), S. 128-130 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Figure 1 shows a block diagram of the equipment. Two concave mirrors not shown in Fig. 1 matched the diameter and wavefront curvature of the laser and telescope beams at the combining beam splitter. The 9% of the laser beam which was reflected by the beam splitter and the 91% of the telescopic beam ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/250128a0
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  • 8
    Digitale Medien
    Digitale Medien
    Oral problems in supportive care: no longer an orphan topic? (2000)
    Springer
    Supportive care in cancer 8 (2000), S. 347-348 
    Details
    ISSN: 1433-7339
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s005200050001
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  • 9
    Digitale Medien
    Digitale Medien
    On sensitivity in optimal control problems (1974)
    Springer
    Journal of optimization theory and applications 13 (1974), S. 56-73 
    Details
    ISSN: 1573-2878
    Schlagwort(e): Sensitivity analysis ; control theory ; mathematical programming ; method of multipliers ; Banach spaces
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract Two types of interpretations of multipliers in both static and dynamic optimization problems are described. It is snown that the Lagrange multipliers encountered in mathematical programming problems and the auxiliary functions arising in Pontryagintype optimal control problems sometimes have highly analogous interpretations as rates of change of the optimal attainable value of an objective function, or in some cases as bounds on average rates of change.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00935609
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