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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 28 (1963), S. 1218-1219 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Grass and forage science 60 (2005), S. 0 
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Annual forage yields of intercrops of berseem clover (Trifolium alexandrinum L.) and oats (Avena sativa L.), as affected by timing of initial harvest and sowing rate of oats, were investigated. Berseem clover was intercropped with oats at 0, 30, 60, 90 and 240 plants m−2 of oats in 1999 and 2000 in Alberta, Canada. Cutting date treatments involved initial harvest at 10-d intervals between 35 and 88 d after planting (DAP), and one or two subsequent harvests of regrowth. Total intercrop dry-matter (DM) yield averaged 12·9–13·3 t ha−1 with proportions of 0·21–0·43 of berseem clover in the forage. Treatments with an initial cut at the silage stage of oats (76 DAP in 1999, 88 DAP in 2000, at about soft-dough stage of oats) had greater yields of oats, lower yields of berseem clover, and lower proportions of berseem clover in total annual yields than treatments with an earlier initial cut. Total crude protein (CP) yield was greater with an initial cut at 65–66 DAP than with a silage-stage initial cut. With an initial cut at 35 DAP (before stem elongation of oats) or after 65 DAP (after heading of oats), yield potential of oats was sometimes reduced compared with silage-stage treatments, but this was balanced by a greater yield of berseem clover. The impact of harvest timing on total yield decreased as the proportion of berseem clover in the intercrops increased. With decreasing density of oats, DM yield of first-cut intercrops and total DM yield of oats decreased, while regrowth and total DM yields of berseem clover increased. Intercrops with oats at 60 plants m−2 had equal or greater total DM and CP yields than intercrops with 240 plants m−2 of oats. For intercrops with oats at 60 plants m−2, with initial cuts at 65–66, 75–76, or 88 DAP, yields of regrowths were 0·30–0·35, 0·16–0·26 and 0·09 of the total yield respectively. Oats–berseem clover intercrops showed potential to manipulate the pattern of annual forage yield and to provide flexibility of harvest without reducing annual yields.
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  • 3
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Berseem clover (Trifolium alexandrinum L.) was sown as an intercrop with oats (Avena sativa L.) at 0, 30, 60, 90 and 240 oats plants m−2 in May in 1999 and 2000 in Alberta, Canada. Forage yield and quality were measured at 10-d intervals between 35 and 88 d after planting (DAP). Yield is defined as the biomass above 6 cm of the soil surface. The dry-matter (DM) yield of berseem clover in sole crops increased by 5–10 g m−2 d−1 between 35 and 55 DAP and then increased by 21–28 g m−2 d−1 between 55 and 75 DAP. The DM yields of oats sown at 240 plants m−2 increased by 26–28 g m−2 d−1 over the whole period from 35 to 75 DAP. Oats were the dominant component in the intercrops, even at low densities of oats. Berseem clover grown with 60 oats plants m−2 received only 0·24 of the incident light when shading by oats peaked at 65 DAP. DM yields of berseem clover in intercrops with 60 oats plants m−2 averaged 0·14–0·32 of the yields of berseem clover sole crops. Between 35 and 88 DAP in 2000, the crude protein (CP) concentration of berseem clover sole crops declined linearly from 310 to 180 g kg−1 DM, and the CP concentration of oats exhibited a quadratic response, declining from 350 g kg−1 DM at tillering to 110 g kg−1 DM at the soft dough stage. The mean CP concentration of berseem clover in intercrops with 60 oats plants m−2 was 25 g kg−1 less than in berseem clover sole crops, indicating that competition by oats reduced the CP concentration of berseem clover. At later sampling dates, CP and DM yields of intercrops with oats at 60 plants m−2 equalled those with oats at 240 plants m−2. The addition of berseem clover to oats in intercrops at 60 oats plants m−2 reduced the neutral-detergent fibre concentration by 30 g kg−1 DM compared with oats alone. Oats were very competitive as a companion crop for berseem clover. Adding berseem clover to oats increased forage quality and may provide for increased intake and digestibility of forage to support higher livestock productivity.
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 123 (2004), S. 0 
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Selection for lodging resistance in Canadian hard red spring wheat under natural conditions is difficult due to the sporadic and often random nature of lodging events. We conducted field trials in Edmonton AB Canada (2000–2002) to determine if either a high seeding rate, or artificially inducing lodging (by dragging a weighted apparatus across plots at the early milk stage), would be an effective screen for determining genetic lodging resistance in wheat breeding programmes. For the 25 genotypes tested, applying artificial lodging at the experimental mean early milk stage was a suitable method to screen and identify lodging tolerant and susceptible genotypes. Tolerance to artificially induced lodging was mainly found within semi-dwarf genotypes, and susceptibility was mainly found within Canadian bread wheat genotypes. Severe lodging resulted in yield losses as high as 40%. Lodging tolerant genotypes identified in this study are now being crossed into elite western Canadian bread wheat in an effort to increase genetic lodging resistance within Canadian breeding lines.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 1 (1962), S. 293-296 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 1646-1646 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    International journal of biometeorology 17 (1973), S. 29-40 
    ISSN: 1432-1254
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Bei Kombinationen von 4 relativen Feuchtigkeiten (rh) und konstanter oder ansteigender Temperatur (Ta) wurden Messungen der Rektaltemperatur (Tre), Federoberflächentemperatur (Ts), Herzfrequenz (HR) und Atemfrequenz (BR) an ausgewachsenen japanischen Wachteln vorgenommen. Bei Ta 40°C stieg Tre zwischen 1,7°–2,5°C an ausgehend von Ta 25°C bei 〈50% und 〉 80% rh. Die Ts folgte diesem Anstieg von Ta und überschritt ihn bis auf 41°C. Hecheln und Gurren stiegen synchron an bis auf 800/min bei hoher rh und 40°C Ta. Die erhöhte Hechelfrequenz war eine direkte lineare Funktion des Wasserdampfdruckes. HR war verlangsamt bei erhöhter, konstanter Ta. Die Hitzebradykardie steht vermutlich in enger Beziehung zu dem Ausmass der von dem Tier empfundenen Belastung.
    Abstract: Resume On a soumis des cailles du Japon adultes à 4 taux différents d'humidité relative (rh) par température constante ou en hausse et mesuré la température rectale (Tre), la température superficielle des plumes (Ts), les battements du coeur (HR) et la vitesse de respiration (BR). Tre a augmenté de 1,7°C, respectivement de 2,5°C par suite d'une hausse de Ta de 25°C à 40°C par humidité basse (〈50%), respectivement élevée (〉80%). Ts a suivi la hausse de Ta et l'a même dépassée jusqu'à atteindre 41°C. Halètement et palpitations ont suivi la courbe de Ta pour atteindre 800/min par rh élevée et 40°C de Ta. La vitesse de respiration s'est élevée en fonction linéaire de la pression de vapeur. HR se sont ralentis par Ta élevée, mais constante. La bradycardie de chaud est probablement étroitement liée à la contrainte ressentie par l'animal.
    Notes: Abstract Measurements of rectal temperature (Tre), feather surface temperature (Ts), heart rate (HR) and breathing rate (BR) of adult Japanese Quail were taken at combinations of four mean relative humidities (rh) and stable or rising air temperature (Ta). Tre increased about 1.7° and 2.5°C at a stable Ta of 40°C from a Ta of 25°C at low (〈50%) and high (〉 80%) rh, respectively. Ts passively increased with Ta while remaining above Ta as high as 41°C. Panting and gular flutter rates were synchronous and approached rates of 800/min at high rh and stable Ta of 40°C. The steady-state panting rate was a direct curvilinear function of ambient water-vapor pressure (Pw). HR was depressed at successively higher, stable Ta's or with slowly increasing Ta. This thermal bradycardia may be related to the degree of discomfort or stress experienced by the animal.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 19 (1963), S. 603-604 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung O2-Verbrauch und Gesamt-Wasserverdunstung wurden bei australischen Zebrafinken gemessen. Bei geringem Wärmeaustausch zwischen Körper und Umgebung durch Strahlung, Konvektion und Ableitung können diese Wüstenvögel den für die Wärmebilanz erforderlichen Wärmeabfluss einzig durch Verdunstung auf dem normalen Niveau halten. Eine solche Fähigkeit ist bei Passeres bisher nicht beobachtet worden.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 46 (1995), S. 546-565 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract The kick-out model for impurity diffusion in semiconductors is studied. The kick-out mechanism is thought to play an important rôle in a number of applications, including the diffusion of zinc and chromium in gallium arsenide. Asymptotic solutions are derived for both one- and two-dimensional surface source problems. In the one-dimensional case, a mechanism for the destruction of self-interstitials is also incorporated. The calculated diffusion profiles have shapes which are typical of diffusion systems in which the kick-out mechanism is believed to be active. For the two-dimensional problem, contours of constant impurity concentration are calculated and some are found to have the ‘bird's beak’ shape which is frequently observed in experiments.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Inventiones mathematicae 15 (1972), S. 47-52 
    ISSN: 1432-1297
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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