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  • Springer  (30)
  • American Chemical Society  (4)
  • American Physical Society (APS)  (2)
  • Canadian Science Publishing  (2)
  • National Academy of Sciences  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and antifolate evaluation of the 10-propargyl derivatives of 5-deazafolic acid, 5-deazaaminopterin, and 5-methyl-5-deazaaminopterin (1992)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 35 (1992), S. 332-337 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00080a019
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  • 2
    Electronic Resource
    Electronic Resource
    Growth and nitrogen nutrition of maize (Zea mays L.) in soil treated with the nitrification-inhibiting insecticide Baythroid (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 161-165 
    Details
    ISSN: 1432-0789
    Keywords: Key words ANI ; Baythroid ; Cyfluthrin ; Insecticide ; 15N ; Nitrification ; N uptake ; Synthetic pyrethroid ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A pot experiment was conducted to compare the uptake and dry matter production potential of NH+ 4 and NO– 3 and to study the effect of Baythroid, a contact poison for several insect pests of agricultural crops, on growth and N uptake of maize (Zea mays L.). Nitrogen was applied as (15NH4)2SO4, K15NO3, or 15NH4NO3 and in one treatment Baythroid was combined with 15NH4NO3. Source of N had, in general, a nonsignificant effect on dry matter and N yield, but uptake of NO– 3 was significantly higher than that of NH+ 4 when both N sources were applied together. Substantial loss of N occurred from both the sources, with NH+ 4 showing greater losses. Baythroid was found to have a significant positive effect on dry matter yield of both root and shoot; N yield also increased significantly. Uptake of N from both the applied and native sources increased significantly in the presence of Baythroid and a substantial added nitrogen interaction (ANI) was determined. The positive effect of Baythroid was attributed to: (1) a prolonged availability of NH+ 4 due to inhibition of nitrification, (2) an increased availability of native soil N through enhanced mineralization, and (3) an enhanced root proliferation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336057
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  • 3
    Electronic Resource
    Electronic Resource
    Growth and nitrogen nutrition of maize (Zea mays L.) in soil treated with the nitrification-inhibiting insecticide Baythroid (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 161-165 
    Details
    ISSN: 1432-0789
    Keywords: ANI ; Baythroid ; Cyfluthrin ; Insecticide ; 15N ; Nitrification ; N uptake ; Synthetic pyrethroid ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A pot experiment was conducted to compare the uptake and dry matter production potential of NH inf4 sup+ and NO inf3 sup- and to study the effect of Baythroid, a contact poison for several insect pests of agricultural crops, on growth and N uptake of maize (Zea mays L.). Nitrogen was applied as (15NH4)2SO4, K15NO3, or 15NH4NO3 and in one treatment Baythroid was combined with 15NH4NO3. Source of N had, in general, a nonsignificant effect on dry matter and N yield, but uptake of NO inf3 sup- was significantly higher than that of NH inf4 sup+ when both N sources were applied together. Substantial loss of N occurred from both the sources, with NH inf4 sup+ showing greater losses. Baythroid was found to have a significant positive effect on dry matter yield of both root and shoot; N yield also increased significantly. Uptake of N from both the applied and native sources increased significantly in the presence of Baythroid and a substantial added nitrogen interaction (ANI) was determined. The positive effect of Baythroid was attributed to: (1) a prolonged availability of NH inf4 sup+ due to inhibition of nitrification, (2) an increased availability of native soil N through enhanced mineralization, and (3) an enhanced root proliferation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336057
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  • 4
    Electronic Resource
    Electronic Resource
    Particle tracking velocimetry in three-dimensional flows (1993)
    Springer
    Experiments in fluids 15 (1993), S. 279-294 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The photogrammetric determination of three-dimensional particle coordinates from a 3-camera system is described in Part I. In Part II we describe a fully automated tracking scheme for the determination of a sequence of velocity vectors within a three-dimensional observation volume of a fluid flow. From this sequence long-time particle trajectories are reconstructed. The tracking scheme is tested on trajectories obtained using the Kinematic Simulation Inertial Model (KSIM). Estimates of the yield of links between adjacent data sets of particle positions and of the yield of long-time particle trajectories are obtained. The limits of efficient tracking as a function of the spacing-displacement ratio p = Δ o/u′Δt are also obtained. The effect of noise, in the form of the apparent appearance and disappearance of particles between one image and the next, and of jitter, which is the error in the determination of particle coordinates, is examined. It is shown that noise reduces the number of links per frame, but does not increase the number of erroneous links which is always small. However, the yield of long trajectories drops sharply with increasing noise. A small level of jitter, on the other hand, does not significantly influence any of the results. The tracking scheme is used on two sets of particle coordinate data obtained from real flows: a non-turbulent flow in a small water tank and a turbulent open channel flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223406
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  • 5
    Electronic Resource
    Electronic Resource
    Incidence and expression of the N1303K mutation of the cystic fibrosis (CFTR) gene (1992)
    Springer
    Human genetics 〈Berlin〉 89 (1992), S. 653-658 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The N1303K mutation was identified in the second nucleotide binding fold of the cystic fibrosis (CF) gene last year. We have gathered data from laboratories throughout Europe and the United States of America in order to estimate its frequency and to attempt to characterise the clinical manifestations of this mutation. N1303K, identified on 216 of nearly 15000 CF chromosomes tested, accounts for 1.5% of all CF chromosomes. The frequency of the N1303K allele varies significantly between countries and ethnic groups, being more common in Southern than in Northern Europe. This variation is independent of the AF508 allele. It was not found on UK Asian, American Black or Australian chromosomes. N1303K is associated with four different linked marker haplotypes for the polymorphic markers XV-2c, KM.19 and pMP6d-9. Ten patients are homozygous for this mutation, whereas 106 of the remainder carry one of 12 known CF mutations in the other CF allele. We classify N1303K as a “severe” mutation with respect to the pancreas, but can find no correlation between this mutation, in either the homozygous or heterozygous state, and the severity of lung disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221957
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  • 6
    Electronic Resource
    Electronic Resource
    Correlative effects of fruits and leaves in senescence of pea plants (1975)
    Springer
    Planta 124 (1975), S. 169-175 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Whole plant senescence was studied in peas (Pisum sativum L.) by defruiting, defoliating, and grafting. Fruit removal delays senescence. The delay in senescence is associated with the initiation of bud expansion at nodes near those producing pods. The apical meristem dies regardless of defruiting though later than normal phants. Graft unions are only made if the stock is defruited The pattern of senescence of unions indicates a non polar movement of senescence factors from fruits. Leaves seem not to be involved in whole plant senescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384759
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of Baythroid on nitrogen transformations in soil (1994)
    Springer
    Biology and fertility of soils 17 (1994), S. 173-176 
    Details
    ISSN: 1432-0789
    Keywords: Ammonification ; Cyfluthrin ; Nitrification ; Nitrogen ; N mineralization ; N transformations ; Pesticides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Laboratory incubation experiments were conducted in soil to study the influence of the insecticide Baythroid on immobilization-remineralization of added inorganic N, mineralization of organic N, and nitrification of added NH inf4 su+ -N. Baythroid was applied at 0, 0.4, 0.8, 1.6, 3.2, and 6.4 μg g-1 soil (active ingredient basis). The treated soils were incubated at 30°C for different time intervals depending upon the experiment. The immobilization and mineralization of N were significantly increased in the presence of Baythroid, the effect being greater with higher doses of the insecticide. Conversely, nitrification was retarded at lower doses of Baythroid and significantly inhibited at higher doses. The results of these studies suggest that excessive amonts of insecticide residues affect different microbial populations differently, leading to changes in nutrient cycling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336318
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  • 8
    Electronic Resource
    Electronic Resource
    Linkage relationships and allelic associations of the cystic fibrosis locus and four marker loci (1987)
    Springer
    Human genetics 〈Berlin〉 76 (1987), S. 337-343 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The linkage relationships between the cystic fibrosis (CF) locus and four marker loci (MET-H, MET-D, D7S8 and D7S16), allelic associations between these loci and the extent of informativity at these marker loci were investigated in a sample of 206 families with at least one child affected by CF. The data were contributed by 11 laboratories from Europe and Israel. The maximum lod scores and recombination frequency estimates ( $$\hat \theta $$ ) (and confidence limits of θ) were: 18.3 at $$\hat \theta $$ =0.007(0.001−0.038) for CF vs. MET, 11.0 at $$\hat \theta $$ (0.001–0.068) for CF vs. D7S8, and 5.7 at $$\hat \theta $$ =0.0(0.0−0.064) for CF vs. D7S16. A gene order of CF-MET-D7S8 was best supported by the data, but its preference to the order D7S8-CF-MET is mainly based on one single family. There are significant allelic associations between CF, MET, D7S8 and D7S16; these allelic associations affect the risk of random individuals to be carriers of CF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272441
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  • 9
    Electronic Resource
    Electronic Resource
    Cloud dispersion models (1993)
    Springer
    Flow, turbulence and combustion 51 (1993), S. 539-545 
    Details
    ISSN: 1573-1987
    Keywords: turbulent transport ; turbulent diffusion ; concentration fluctuations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new technique has been developed to compute mean and fluctuating concentrations in complex turbulent flows. An initial distribution of material is discretised into any small clouds which are advected by a combination of the mean flow and large scale turbulence. The turbulence can be simulated either by Kinematic Simulation or by a stochastic model for the motion of each cloud centroid. The clouds also diffuse relative to their centroids; the statistics for this are obtained from a separate calculation of the growth of individual clouds in small scale turbulence, generated by Kinematic Simulation. The ensemble of discrete clouds is periodically rediscretised, to limit the size of the small clouds and prevent overlapping. The model is illustrated with simulations of dispersion in uniform flow and in a coastal flow, and the results are compared with analytic, steady state solutions where available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01082588
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  • 10
    Electronic Resource
    Electronic Resource
    Mapping Procedural Patterns to Object-Oriented Design Patterns (1999)
    Springer
    Automated software engineering 6 (1999), S. 265-289 
    Details
    ISSN: 1573-7535
    Keywords: design patterns ; reengineering ; program transformation ; object oriented design
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper presents a new approach to the use of design patterns for the reengineering of legacy code, using a mapping from procedural design patterns to object-oriented patterns. We show also how object-oriented design patterns can be formalised and correctness conditions for their application derived, in order to justify the preservation of functionality in the reengineering process. We give examples taken from case studies of reengineering legacy COBOL applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008708927260
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