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  • 1
    Electronic Resource
    Electronic Resource
    Surface-emitting two-dimensional coherent semiconductor laser array (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 331-333 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We describe a new surface-emitting semiconductor structure, its fabrication, and its performance. Phase-locked emission takes place from a region much larger than the wavelength in two dimensions; therefore we term this device a two-dimensional coherent array. The key feature of our device is that the radiation is coupled directly from the active region using a nonresonant grating coupler, i.e., the grating is of noninteger order.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101899
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  • 2
    Electronic Resource
    Electronic Resource
    STATISTICS IN CLINICAL RESEARCH (1950)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 52 (1950), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1950.tb53985.x
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  • 3
    Electronic Resource
    Electronic Resource
    Endogenous ethylene does not initiate but may modify geobending–A role for ethylene in autotropism (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 6 (1983), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Ethylene production during geostimulation was examined in peduncles of dandelion (Taraxacum officinale). Significant amounts of ethylene were evolved from geostimulated peduncles compared with vertical controls only after geostimulation of 2 h or longer and the extra ethylene arose mainly from the lower portion of geostimulated peduncles. Reduction of the ethylene produced from geostimulated peduncles by pretreatment with ethylene-synthesis inhibitors did not affect or enhanced subsequent geobending. It is proposed that ethylene may control the later stages of geobending and influence the straightening process of autotropism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1983.tb01278.x
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  • 4
    Electronic Resource
    Electronic Resource
    Photosynthesis and the influence of CO2-enrichment on δ13C values in a C3 halophyte (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 9 (1986), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Shifts in †13C of the graminaceous C3 halophyte Puccinellia nuttalliana (Schultes) Hitch. can be induced by salinization. To investigate this phenomenon, three approaches were taken: assay of carboxylases, CO2-enrichment studies, and gas exchange analysis. Although ribulose-1,5-bisphosphate carboxylase activity decreased with salinity, phosphoenolpyruvate carboxylase activity did not increase and its levels were not atypical of C3 plants. When plants were grown at four NaCl concentrations under atmospheres of 310 and 1300 cm3 m−3 CO2, the CO2-enrichment enhanced the effects of salinity on †13C. This is consistent with a biophysical explanation for salt-induced shifts in †13C, whereby there is a steepening of the CO2 diffusion gradient into the leaf. Gas exchange analysis indicated that intercellular CO2 concentrations were depressed in the leaves of salt-affected plants. This resulted from a greatly decreased stomatal conductance coupled with only small effects on intrinsic photosynthetic capacity. Water-use efficiency was enhanced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1365-3040.ep11614337
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  • 5
    Electronic Resource
    Electronic Resource
    Degradation of pectic substances in carrots by heat treatment (1988)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 36 (1988), S. 362-365 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf00080a030
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  • 6
    Electronic Resource
    Electronic Resource
    A study of the potential of lucerne as a silage crop in a high-rainfall area (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 42 (1987), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The results are reported of a 2-year plot experiment investigating the potential of lucerne as a silage crop in a comparatively high-rainfall area (annual average of about 900 mm). The performance of the lucerne on the remainder of the field in which the plot experiment was located is also discussed. With below-average rainfall in the sowing year a good establishment was obtained and a single cut to a stubble height of 75 mm in August gave a dry matter yield of 3 t ha-1. In the first harvest year, summer rainfall was again below average and a total dry matter yield of 13·8 t ha-1 resulted from three cuts to 75 mm above ground level. However, the total yield was reduced to 10·11 ha-1 in the second year when the rainfall was considerably above average. Attempts to increase the feeding value of the lucerne herbage by increasing cutting frequency and by increasing cutting height showed little effect over the standard system of three cuts to a stubble height of 75 mm. The effects of applying potassium fertilizer at rates supplying 100,200 or 300 kg K ha-1 either as a single spring dressing or in equally divided dressings were not significant in either of the two years
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1987.tb02106.x
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  • 7
    Electronic Resource
    Electronic Resource
    Silage and milk production: a comparison between supplements of barley and soybean meal offered with white clover silage (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 39 (1984), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Silage made from Blanca white clover was offered ad libitum to four Friesian cows in a 12-week changeover experiment. The silage contained 990 g white clover DM (kg DM)−1 with 254 g DM kg−1 and 243 g CP (kg DM)−1 The pH was 3.98 and the in vitro DOMD concentration 680 g kg−1. The silage was the sole feed in the control treatment; in the other three treatments it was supplemented with barley, soybean meal, and a mixture of these feeds supplying 8.1, 2.7 and 7.8 kg DM per cow respectively. The daily intakes of silage DM were 19.3, 13.5, 17.5 and 13.5 kg per cow, and the daily milk yields were 26.3, 28.0, 28.6 and 27.6 kg per cow on the control, barley, soybean and barley plus soybean treatments respectively. It is concluded that the white clover silage had an excellent fermentation and a large potential for milk production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1984.tb01696.x
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  • 8
    Electronic Resource
    Electronic Resource
    The combined use of fertilizer nitrogen and white clover on grazed ryegrass swards (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 40 (1985), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A 1-year grazing experiment with dairy cows is described in which the milk yield and herbage intake from a sward of S23 perennial ryegrass alone receiving fertilizer N at an annual rate of 360 kg ha−1 were compared with those from a ryegrass-white clover var. Blanca sward given a total N application of 180 kg ha−1. Both treatments gave virtually the same total milk yield of about 12500 kg ha−1 over a 20-week grazing season.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1985.tb01766.x
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  • 9
    Electronic Resource
    Electronic Resource
    Silage and milk production: studies with diets containing white clover silage (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 38 (1983), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: In three separate feeding experiments using a total of twenty-six individually-housed Ayrshire cows, three wilted silages made from Blanca white clover were offered ad libitum with either different supplements or different proportions of grass silage. The clover silages contained 680 g white clover kg−1 on a DM basis, and had a mean DM concentration of 263 g kg−1 with 231 g CP kg−1 DM and 91 g ammonia-N kg−1 N. The pH values averaged 4·16 and the DOMD concentrations 611 g kg−1. In experiment 1 the daily intake of clover silage given alone was 15.2 kg DM per cow, i.e. 30·1 g kg−1 live weight, and decreased by 0·76 kg DM kg−1 barley DM and by 0·66 kg DM kg−1barley plus soybean meal DM when these feeds were offered as supplements. Milk yield and fat concentration were higher on the supplement treatments than on the clover silage-only treatment. In experiments 2 and 3 the intakes of silage and total DM increased as the weight of clover in the diet increased from 0 to 700 g kg−1 with parallel increases in milk yield. The effects on milk composition were small and generally non-significant. Although white clover silages with excellent fermentations were made, it is concluded that the main role of white clover in a silage system will be in mixed swards with grass to reduce the input of fertilizer N and to increase the voluntary intake of silage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1983.tb01638.x
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  • 10
    Electronic Resource
    Electronic Resource
    Evaluation of pulse fishing for the walleye, Stizostedion vitreum vitreum, in Henderson Lake, Ontario (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 27 (1985), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A total of 3226 walleye were removed from Henderson Lake, Ontario over 3 years (1980–2), causing the stock to collapse. This removal tested the applicability of ‘pulse’ fishing as a management alternative, and also provided an opportunity to determine which population characteristics might be monitored to serve as predictors of stock collapse in this species.Following initial exploitation, increased length at age occurred only within younger age-lasses. To use this response as a predictor, one must first obtain pre-exploitation length-at-age data through using the proper gear to sample small fish. Abrosov's mean age to mean age at maturity index may also forewarn of stress (1.2 critical t value for Henderson Lake), but poor recruitment usually invalidates this index, since the lower angling vulnerability of large fish biases mean age calculations. While annual production estimates were a good indicator of the collapse, their determination required much effort. Petersen population estimates produced much more realistic estimates of population size than Schumacher–Eschmeyer estimates, but both estimates not only require much effort but also are influenced by changes in recruitment.Poor predictors of the walleye collapse included: catch-per-unit-effort data, which, while giving some idea of fish density, were not good indices of exploitation stress; condition factors, which were not correlated to fish abundance; fecundity increases, which suffered far too much of a retarded response in Henderson Lake to serve as a predictor of stock collapse. The inability to determine accurately sex ratios of measure recruitment made these parameters unless.At least over the short term, neither northern pike nor white sucker populations have increased following the walleye collapse. As yet, walleye have not returned to their former abundance, so the operational usefulness of ‘pulse’ fishing remains an unknown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1985.tb03245.x
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