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  • 1
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    Manpower Requirements and Education in Nuclear Science: An International Perspective (2005)
    Springer
    Details
    Publication Date: 2005-01-01
    Print ISSN: 0236-5731
    Electronic ISSN: 1588-2780
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    The influence of glucosinolates and sugars on feeding by the cabbage stem flea beetle,Psylliodes chrysocephala (1994)
    Springer
    Entomologia experimentalis et applicata 73 (1994), S. 77-83 
    Details
    ISSN: 1570-7458
    Keywords: Psylliodes chrysocephala ; cabbage stem flea beetle ; oilseed rape ; host plant selection ; glucosinolates ; surgars ; feeding stimulant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Agar was used as an artificial substrate to investigate the feeding behaviour of the cabbage stem flea beetle,Psylliodes chrysocephala L. (Coleoptera: Chrysomelidae), an important pest of winter oilseed rape (Brassica napus) in Europe. Both glucosinolates and sugars stimulated feeding when added to agar. The amount of feeding that occurred was affected by the type and concentration of glucosinolate and surgar and also by combinations of components. Although glucosinolates were potent feeding stimulants forP. chrysocephala, they were not a prerequisite for feeding, nor does it seem likely that glucosinolate profiles are used by this species to discriminate amongst cruciferous plants at the gustatory level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382516
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  • 3
    Electronic Resource
    Electronic Resource
    Sex pheromones in the cereal aphid parasitoidsPraon volucre andAphidius rhopalosiphi (1993)
    Springer
    Entomologia experimentalis et applicata 69 (1993), S. 33-39 
    Details
    ISSN: 1570-7458
    Keywords: Hymenoptera ; Aphidiinae ; aphid ; sex pheromone ; parasitoid ; Praon volucre ; Aphidius rhopalosiphi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Laboratory and field experiments provided evidence for the release of sex pheromones by virgin femalePraon volucre Haliday andAphidius rhopalosiphi De Stefani-Perez (Hymenoptera: Braconidae, Aphidiinae). In Petri dish biosassays, rubber or vermiculite models treated with crude virgin female extracts were frequently approached by males and elicited rapid wing-fanning behaviour and copulation attempts. Delta-shaped water traps containing live virgin females caught large numbers of conspecific males when placed in winter wheat crops. Trapping slightly below crop height resulted in higher catches than trapping above the crop canopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380671
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  • 4
    Electronic Resource
    Electronic Resource
    Land loss as a cause of unrest among the rural spanish-American village population of northern New Mexico (1985)
    Springer
    Agriculture and human values 2 (1985), S. 25-39 
    Details
    ISSN: 1572-8366
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01530584
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  • 5
    Electronic Resource
    Electronic Resource
    The influence of aphids and honeydew on the leaving rate of searching aphid parasitoids from wheat plants (1992)
    Springer
    Entomologia experimentalis et applicata 63 (1992), S. 259-264 
    Details
    ISSN: 1570-7458
    Keywords: Aphid ; parasitoid ; honeydew ; behaviour ; cereals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Dispersal cages were used to investigate the effects of aphids and treatment with artificial honeydew on the leaving rate of searching females of the parasitoid Aphidius rhopalosiphi from groups of wheat plants. Parasitoids which flew away from groups of plants placed in the centre of a cage were trapped on the sides and roof of the cage and thus were prevented from returning to the plants. The positions of trapped parasitoids suggested their direction of flight when dispersing from the plants. Parasitoids increased their residence times on groups of plants in the presence of aphids and of artificial honeydew, but the rate of parasitism of the host Sitobion avenae was not raised by the presence of artificial honeydew under the experimental conditions used. The direction of flight taken by the majority of parasitoids suggested that they were leaving the plants in order to locate further plants nearby to continue searching rather than to terminate searching and disperse away from the area. The need to consider plant patch size in studies of parasitoid searching behaviour is stressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192774
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  • 6
    Electronic Resource
    Electronic Resource
    Feeding of the cabbage stem flea beetle Psylliodes chrysocephala on high and low glucosinolate cultivars of oilseed rape (1996)
    Springer
    Entomologia experimentalis et applicata 80 (1996), S. 87-89 
    Details
    ISSN: 1570-7458
    Keywords: secondary plant metabolites ; isothiocyanates ; variability ; plant genetics ; Chrysomelidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00194731
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  • 7
    Electronic Resource
    Electronic Resource
    Coral transplantation as an aid to reef rehabilitation: evaluation of a case study in the Maldive Islands (1995)
    Springer
    Coral reefs 14 (1995), S. 201-213 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract.  As part of a study of reef rehabilitation, whole coral colonies (primarily Acropora, Pocillopora, Porites, Favia and Favites) were transplanted and cemented in place onto three approximately 20 m2 areas of Armorflex concrete mats on a 0.8-1.5 m deep reef-flat in the Maldives which had been severely degraded by coral mining. Growth, in situ mortality, and losses from mats due to wave action of a total of 530 transplants were monitored over 28 months. Natural recruitment of corals to both the transplanted Armorflex areas and concrete mats without transplants was also studied. Overall survivorship of corals 28 months after transplantation was 51%. Most losses of transplants due to wave action occurred during the first 7 months when 25% were lost, with only a further 5% of colonies being lost subsequently. Within 16 months most colonies had accreted naturally to the concrete mats. Thirty-two percent of transplants which remained attached died with Acropora hyacinthus and Pocillopora verrucosa having the highest mortality rates (approx. 50% mortality over two years) and Porites lobata and P. lutea the lowest (2.8 and 8.1% mortality respectively over two years). Growth rates were very variable with a quarter to a third of transplants showing negative growth during each inter-survey period. Acropora hyacinthus, A. cytherea and A. divaricata transplants had the highest growth rates (colony mean linear radial extension 4.15-5.81 cm y−1), followed by Pocillopora verrucosa (mean 2.51 cm y−1). Faviids and poritids had lowest growth rates. Favia and Favites showed the poorest response to transplantation whilst Acropora divaricata, which combined a high growth rate with relatively low mortality, appeared particularly amenable to transplantation. Natural recruitment did not differ significantly between concrete mats with and without transplanted corals. ‘Visible’ recruits were first recorded 10 months after emplacement of the mats and were predominantly Acropora and Pocillopora. On near vertical surfaces their density was almost 18 m−2. Recruits grew fast producing many 20-30 cm diameter colonies on the mats within 3.5 years. Growth and survival of transplants are compared with results of transplantation studies in other locations. We conclude: (1) species transplanted should be selected with care as certain species are significantly more amenable than others to transplantation, (2) the choice of whether fragments or whole colonies are transplanted may profoundly influence survival, (3) considerable loss of transplants is likely from higher energy sites whatever method of attachment, (4) transplantation should, in general, be undertaken only if recovery following natural recruitment is unlikely.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00334342
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  • 8
    Electronic Resource
    Electronic Resource
    Coral transplantation as an aid to reef rehabilitation: evaluation of a case study in the Maldive Islands (1995)
    Springer
    Coral reefs 14 (1995), S. 201-213 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract As part of a study of reef rehabilitation, whole coral colonies (primarily Acropora, Pocillopora, Porites, Eavia and Favites) were transplanted and cemented in place onto three approximately 20 m2 areas of Armorflex concrete mats on a 0.8–1.5 m deep reef-flat in the Maldives which had been severely degraded by coral mining. Growth, in situ mortality, and losses from mats due to wave action of a total of 530 transplants were monitored over 28 months. Natural recruitment of corals to both the transplanted Armorflex areas and concrete mats without transplants was also studied. Overall survivorship of corals 28 moths after transplantation was 51%. Most losses of transplants due to wave action occurred during the first 7 months when 25% were lost, with only a further 5% of colonies being lost subsequently. Within 16 months most colonies had accreted naturally to the concretemats. Thirty-two percent of transplants which remained attached died with Acropora hyacinthus and Pocillopora perrucosa having the highest mortality rates (approx. 50% nortality over two years) and Porites lobata and P. lutea the lowest (2.8 and 8.1% mortality respectively over two years). Growth rates were very variable with a quarter to a third of transplants showing negative growth during each inter-survey period. Acropora hyacinthus, A. cytherea and A. divaricata transplants had the highest growth rates (colony mean linear radial extension 4.15–5.81 cm y-1), followed by Pocillopora verrucosa (mean 2.51 cm y-1). Faviids and poritids had lowest growth rates. Favia and Favites showed the poorest response to transplantation whilst Acropora divaricata, which combined a high growth rate with relatively low mortality, appeared particularly amenable to transplantation. Natural recruitment did not differ significantly between concrete mats with and without transplanted corals. ‘Visible’ recruits wer first recorded 10 months after emplacement of the mats and were predominantly Acropora and Pocillopora. On near vertical surfaces their density was almost 18 m-2. Recruits grew fast producing many 20–30 cm diameter colonies on the mats within 3.5 years. Growth and survival of transplants are compared with results of transplantation studies in other locations. We conclude: (1) species transplanted should be selected with care as certain species are significantly more amenable than others to transplantation, (2) the choice of whether fragments or whole colonies are transplanted may profoundly influence survival, (3) considerable loss of transplants is likely from higher energy sites whatever method of attachment, (4) transplantation should, in general, be undertaken only if recovery following natural recruitment is unlikely.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00334342
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  • 9
    Electronic Resource
    Electronic Resource
    Determination of nitrogen by the method of Kirsten (1955)
    Springer
    Microchimica acta 43 (1955), S. 1012-1015 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Erfahrungen mit der Methode vonKirsten zur Bestimmung des Stickstoffs haben gezeigt, daß es besser ist, auf die bewegliche Füllung des Verbrennungsrohres zu verzichten. Eine abgeänderte Methode wird beschrieben, die einfacher ist als das ursprüngliche Verfahren, wobei aber die gleiche Genauigkeit erzielt wird.
    Abstract: Résumé L'expérience avec la méthode deKirsten pour la détermination de l'azote a avéré que le rendement est amélioré si la charge temporaire est supprimée. Une méthode modifiée a été décrite; elle est plus simple que la méthode originale tout en donnant des résultats aussi exacts.
    Notes: Summary Experience with theKirsten method for the determination of nitrogen has shown that improved performance is obtained by omitting the temporary filling. A modified method is described which is simpler than the original, but which gives results of equal accuracy and precision.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01224000
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  • 10
    Electronic Resource
    Electronic Resource
    The microanalysis of fluorine-containing organic compounds. II. the determination of fluorine (1953)
    Springer
    Microchimica acta 41 (1953), S. 283-289 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Organische Fluorverbindungen werden durch Schmelzen mit metallischem Natrium bzw. Kalium in einer Nickelbombe besonderer Konstruktion zerstört und das Fluor mit Thoriumnitratlösung titriert. Einige Modifikationen dieses Titrationsverfahrens wurden zunächst geprüft, aber nur eine davon erwies sich endgültig als für die Bestimmung geeignet: die Rüektitration einer Vergleichalösung mit einer Standardlösung von Natriumfluorid. Bei Gegenwart von Stickstoff und Schwefel bilden sich Cyanidbzw. Sulfidionen, deren störender Einfluß durch eine kleine Abänderung des Verfahrens ausgeschaltet werden muß.
    Abstract: Résumé Les composés organiques fluorés sont décomposés par fusion avec le sodium métallique ou le potassium dans une bombe de nickel de construction spéciale et le fluor est titré avec le nitrate de thorium en solution. Plusieurs modifications de ce mode de titrage furent d'abord examinées pour terminer le dosage, mais un seul fut trouvé convenable, le titrage par retour d'une solution de comparaison avec une solution de fluorure de sodium. Quand l'azote et le soufre qui forment des ions cyanhydriques et suifhydriques sont présents, le procédé doit être légèrement modifié afin d'empêcher leur interférence.
    Notes: Summary The compound is decomposed by fusion with metallic sodium or potassium in a nickel bomb of special design, and the fluorine is titrated with thorium nitrate solution. Several modifications of this titration procedure were first examined as a means of completing the determination, but only one was found suitable, i. e. back-titration of a comparison solution with a standard sodium fluoride solution. When nitrogen and sulphur, which form cyanide and sulphide ions, are present, the procedure has to be modified slightly to overcome their interference.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01624897
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