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  • 1
    Electronic Resource
    Electronic Resource
    Disilylation of conjugated dienes. Configuration of diene anion radicals annd dianions (1968)
    s.l. : American Chemical Society
    The @journal of organic chemistry 33 (1968), S. 1975-1982 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01269a060
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Soliton versus nonsoliton operation of fiber ring lasers (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 149-151 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: To date most passively mode-locked erbium-doped fiber laser systems have employed solitons for short pulse generation, and ultrashort high energy pulses have been difficult to achieve. We show that by reducing the system nonlinearity via pulse stretching and employing net positive dispersion cavities, pulses of sub-100-fs duration and (approximately-greater-than)100 pJ energy are readily generated. Data are presented for varying net dispersion in a fiber ring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111547
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Broadly tunable sub-500 fs pulses from an additive-pulse mode-locked thulium-doped fiber ring laser (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 19-21 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report an additive-pulse mode-locked (APM) thulium-doped fiber ring laser producing 350–500 fs pulses tunable from 1798 to 1902 nm. The laser operates in the soliton regime, where periodic perturbations cause predictable sidebands and modulation in the optical spectrum. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.115477
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The effects of root temperature and Ca supply on the growth and transpiration of cotton seedlings (Gossypium hirsutum, L.) (1971)
    Springer
    Plant and soil 34 (1971), S. 721-729 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Cotton seedlings were germinated in either tap water or a CaSO4 solution and then grown for two days in nutrient solutions containing 0.1, 1.0, or 10.0 me Ca/1. They were then transferred to cultures having the same Ca variables and the roots subjected to temperatures of 26, 18, 15 and 12°C for four days. The fresh weight of all plant parts and leaf area increased with increasing root temperatures and with increasing Ca levels, the effect of Ca being most pronounced at the higher temperatures. The dry weight was increased by increasing root temperature; the effect of Ca was rather small. Water use increased with increasing temperature and was higher for the lowest Ca level than for the higher levels. The results emphasize the overriding effect of low temperature on water uptake. Calcium had little effect on the growth depression resulting from low root temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01372826
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of nitrogen sources and iron levels on the growth and composition of Sitka spruce and Scots pine (1974)
    Springer
    Plant and soil 41 (1974), S. 573-588 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Nitrate-N was an inferior source of N for both Sitka spruce and Scots pine, resulting in lower dry weights and moderate chlorosis of newly developing needles. The NO3-N source resulted in a greater cation concentration in the tissues and a greater organic anion content as measured by the difference in inorganic cations and inorganic anions. Chlorosis was partially alleviated when additional Fe was supplied as FeEDDHA and there was a slight decrease in organic anions (C-A). It is suggested that the chlorosis might be explained by the competitive chelation hypothesis which states that the activity of the Fe is reduced by metals or various ligands, in this case by the excess organic anions produced by NO3-N nutrition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02185817
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Trifluralin-induced chlorosis in soybeans (Glycine max (L.) Merr.) grown on clayey, high pH soils (1986)
    Springer
    Plant and soil 96 (1986), S. 175-184 
    Details
    ISSN: 1573-5036
    Keywords: Glycine max (L.) Merr ; High pH ; Mineral nutrition ; Nutrient uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The cause of leaf chlorosis, frequently observed on soybeans (Glycine max (L.) Merr.) grown on high pH soils of the Mississippi Blackland Prairie, is thought to be low Fe availability and restricted rooting. Three greenhouse experiments were conducted using two soils, Sumter, a Rendollic Eutrocrept and Okolona, a Typic Chromudert; nine soybean cultivars differing in Feefficiency; and trifluralin (α-α-α-trifluoro-2,6-dinitro-N, N-di-propyl-p-toludine). Trifluralin at rates greater than 0.56 kg/ha caused chlorosis which was more severe on the Sumter, a soil low in available Fe. Fe-efficient cultivars were more resistant to the chlorosis induced by trifluralin than the Fe-inefficient cultivars. It was concluded that the chlorosis is an Fe deficiency caused by reduced uptake. The herbicide-induced chlorosis can be avoided by proper dosage and placement of the herbicide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374762
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