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  • 1
    Electronic Resource
    Electronic Resource
    Bacterial mitigation of pollutants in acid drainage using decomposable plant material and sludge (2000)
    Springer
    Environmental geology 40 (2000), S. 195-215 
    Details
    ISSN: 1432-0495
    Keywords: Keywords Acid-drainage ; Bioremediation ; Sewage ; Sulphate-reducing-bacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Effects of a clay-lime spiked sewage sludge and fresh decomposable ryegrass on the mitigation of an acid drainage were studied in the laboratory. Treatments (dry ameliorant weight/leachate ratio) were: (1) sludge (air-dried) at rates of 0, 8, 16 and 24%, (2) ryegrass at 0, 1, 1.5 and 2% (dry weight), (3) sludge (at the above-mentioned rates) and 1.5% ryegrass mixture. Measurements of mitigation (according to the criteria of changes in pH, Fe, S, Al and heavy metals) made every 10th day for 100 days showed ryegrass/sludge combination the most effective while sustaining mitigation longest, with or without the influence of sulphate-reducing bacteria (SRB). Sulphate and Fe in the acid drainage decreased in the order: sludge+ryegrass〉sludge〉ryegrass by 180, 40, 19; and 96, 83 and 54% respectively, compared with controls. An 11-fold decrease in soluble Al was caused by the highest rate of the combined sludge-ryegrass treatment but Al was doubled by the sludge-only treatment, and only minimally affected (2% reduction) by the ryegrass-only treatment. For the sludge plus ryegrass treatments at the highest rate of application, pH levels increased significantly, from 2.3 to 〉7 units and within 20 days of SRB activation, the concentration of Co, Cu, Mn, Ni and Zn decreased 3-, 15-, 90-, 3- and 50-fold respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540000138
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  • 2
    Electronic Resource
    Electronic Resource
    The mass relation m"A = √2m" from current algebra and the Kroll-Ruderman theorem
    Amsterdam : Elsevier
    Nuclear Physics, Section B 4 (1968), S. 462-466 
    Details
    ISSN: 0550-3213
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0550-3213(68)90104-1
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  • 3
    Electronic Resource
    Electronic Resource
    Superconvergence relations in γN-〉πΔ(1236)
    Amsterdam : Elsevier
    Nuclear Physics, Section B 19 (1970), S. 645-652 
    Details
    ISSN: 0550-3213
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0550-3213(70)90375-5
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  • 4
    Electronic Resource
    Electronic Resource
    Feeding habits, post-embryonic and adult survival, mating, virility and fecundity of the predacious miteAmblyseius swirskii [Acarina: Phytoseiidae] on some coccids and mealybugs (1977)
    Springer
    BioControl 22 (1977), S. 383-392 
    Details
    ISSN: 1573-8248
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé La valeur nutritive des aliments suivants a été faible même lorsqu'à du miellat ont été additionnés: des œufs ou des larves nouvelles nées deCoccus hesperidum L.,Saissetia oleae (Olivier),S. coffeae (Walker),Pseudococcus citriculus Green etP. longispinus Targ.-Tozz.; seulement une faible proportion est arrivée au stade adulte, le taux d'oviposition de ceux-ci étant négligeable. Cependant la ponte deAmblyseius swirskii a été accrue lorsque du miellat fut ajouté àTetranychus cinnabarinus Boisd. Le miellat est un aliment préféré deA. swirskii, tandis que les œufs et larves nouvelles nées des espèces testées ne sont pas attaqués ni dévorés avec appétit. Des femelles et des mâles élevés sur du miellat s'accouplent facilement, les femelles sont fécondées, mais la quantité d'œufs pondue reste négligeable.
    Notes: Abstract The nutritional value forAmblyseius swirskii Athias-Henriot, of eggs or crawlers ofCoccus hesperidum L.,Saissetia oleae (Olivier),S. coffeae (Walker),Pseudococcus citriculus Green, andP. longispinus Targ.-Tozz, even with the addition of honeydew, was low; only a few young reached adulthood and the oviposition rate was negligible. However, addition of honeydew toTetranychus cinnabarinus Boisd. enhanced the oviposition rate ofAmblyseius swirskii. Honeydew was a favourite food forA. swirskii, whereas the eggs and crawlers tested were not eagerly attacked and consumed. Females and males fed honeydew ofSaissetia oleae mated readily and the females were inseminated, but fecundity was negligible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373263
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of temperature on the oviposition rate and longevity ofOpius concolor siculus [Hymenoptera: Braconidae] (1974)
    Springer
    BioControl 19 (1974), S. 61-66 
    Details
    ISSN: 1573-8248
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé L'auteur a étudié l'influence de différentes températures sur la ponte et sur la longévité de l'Opius concolor siculus en expérimentant 13 couples à 22°, 15 à 24°, 100 à 26° et 11 à 28°C. La température de 26° se montra plus favorable. On a trouvé des différences entreOpius concolor Szepl. «Africains» et lesOpius concolor siculus Mon. «Siciliens».
    Notes: Abstract The author has studied the influence of different temperatures (22°, 24°, 26°, 28°C) on oviposition and longevity ofOpius concolor siculus Mon., studying separately 13 couples at 22°, 15 at 24°, 100 at 26° and 11 at 28°C. The optimum temperature has been found to be 26°C. Differences have been observed betweenO. concolor Szepl. «African» andO. concolor siculus Mon. «Sicilian».
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02371509
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of microorganisms, salinity and turbidity on hydraulic conductivity of irrigation channel soil (1994)
    Springer
    Irrigation science 15 (1994), S. 159-166 
    Details
    ISSN: 1432-1319
    Keywords: Polysaccharides ; Clogging ; Hydraulic conductivity ; Algae ; Bacteria ; Chlorophyll ; Irrigation channel ; Seepage ; Microorganisms ; Salinity Turbidity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The introduction of polysaccharide producing benthic algae and bacteria could provide a low cost technique for seepage control in irrigation channels. The ability of algae and bacteria to produce polysaccharides proved to be successful in reducing the hydraulic conductivity of irrigation channel soil. Hydraulic conductivity was reduced to less than 22% of its original value within a month of inoculating soil columns with algae. Chlorophyll and polysaccharide concentrations in irrigation channel soil were measured in order to assess the growth of algae and extent of polysaccharide production, and their correlation with hydraulic conductivity of channel soil. Increases in polysaccharide occurred in the top layer (0–5 mm) of the soil column. The reduction of hydraulic conductivity was highly correlated with the amount of polysaccharides produced (r 2 = 0.92). Hydraulic conductivity decreased with increasing algal and bacterial numbers. The first few millimetres of the soil core where microbial activity was concentrated, seemed effective in controlling seepage. Incorporation of extra nitrate and phosphate into algal medium did not increase the production of polysaccharides by algae in channel soil. The effect of salinity and turbidity of irrigation channel water on channel seepage was studied by measuring the effects on hydraulic conductivity of channel soils. When the electrical conductivity (EC) of the water increased above a threshold value, the hydraulic conductivity increased because of the flocculating effects on clay particles in channel soils. A relationship between sodium adsorption ratio (SAR) and EC of the channel water was established which indicated 15% increase in channel seepage due to increases in salinity. Increasing the turbidity of irrigation water (by increasing the concentration of dispersed clay) resulted in lowering the hydraulic conductivity of the channel soil due to the sealing of soil pores by dispersed clay particles. When the turbidity of the water was 10 g clay l−1, the hydraulic conductivity was reduced by 100%. An increase in clay concentration above 1 g l−1 resulted in significant reduction in hydraulic conductivity. Soil bowl experiments indicated that clay sealing with a coating of hydrophobic polymer on the surface could also effectively prevent seepage of saline water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193683
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  • 7
    Electronic Resource
    Electronic Resource
    Algorithm for Computing the Propagator for Higher Derivative Gravity Theories (2000)
    Springer
    International journal of theoretical physics 39 (2000), S. 1599-1608 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A simple algorithm for computing the propagator for higher derivative gravitytheories based on the Barnes–Rivers operators is presented. The prescription isused, among other things, to obtain the propagator for quadratic gravity in anunconventional gauge. We also find the propagator for both gravity and quadraticgravity in an interesting gauge recently baptized the “Einstein” gauge[Hitzer and Dehnen, Int. J. Theor. Phys. 36 (1997), 559].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003632311419
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of cadmium on growth and pharmacologically active constituents of the medicinal plant Coriandrum sativum L. (1995)
    Springer
    Water, air & soil pollution 84 (1995), S. 147-157 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The effects of high levels of cadmium in soil and in the atmosphere on the plants of Coriandrum sativum L. (Umbellifereae) were investigated. Plants grown in contaminated soil (0, 10, 100 ppm of cadmium) showed a significant reduction in the length of the stems and roots and the number of the umbels, a yellowing and ultrastructural alterations of the leaves and a significant decrease in the essential oil composition. Similar effects were observed in the plants exposed to a simulated atmospheric pollution (plants were sprayed with CdCl2 solutions containing Cd 0, 10, 100 mg/L). The effects are related to a degree of environmental contamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00479594
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