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  • Analytical Chemistry and Spectroscopy  (3)
  • Beauveria bassiana  (2)
  • MECHANICAL ENGINEERING  (2)
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  • 1
    ISSN: 1573-8248
    Schlagwort(e): Beauveria bassiana ; marcescent process ; mass production ; fermenter ; dry mycelium ; conidiation ; Beauveria bassiana ; production de masse ; fermenteur ; mycélium sec ; production de conidies
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Beschreibung / Inhaltsverzeichnis: Résumé Le mycélium deBeauveria bassiana peut être développé en milieu liquide, filtré et le mycélium séché. Après réhydratation, le mycélium sporule. Deux sources d'hydrates de carbone (sucrose et maltose) et une source azote/vitamine (extrait de levure) furent essayées pour la croissance du mycélium et la production consécutive de conidies. La croissance maximale du mycélium (12,31 mg/ml) en culture liquide, intervenait dans un milieu: sucrose (3,5%)/extrait de levure (3,5%), mais le mycélium issu d'un milieu maltose (2%)/extrait de levure (0.75%) produisait le maximum de 4,62×106 conidies/mg de mycélium sec après incubation en boîtes humides de Pétri. En utilisant les données sur la production de mycélium (en culture liquide) et sur celle de conidies (par le mycélium sec), on a calculé que les milieux sucrose (3,5%)/extrait de levure (3,5%) et maltose (2%)/extrait de levure (0,75%) produisaient la plus grande quantité de conidies par volume de milieu (l'équivalent de 3,52–3,72×107 conidies/ml).
    Notizen: Abstract Mycelium ofBeauveria bassiana can be grown in liquid culture, filtered, and the mycelium dried. After rehydration the mycelium sporulates. Two carbohydrate sources (sucrose and maltose), and one nitrogen/vitamin source (yeast extract) were tested for mycelium growth and subsequent conidial production. Maximum mycelium growth (12.31 mg/ml), in liquid culture, was in the sucrose (3.5%)/yeast extract (3.5%) medium, but mycelium from a maltose (2%)/yeast extract (0.75%) medium produced the maximum of 4.62×106 conidia/mg dry mycelium after incubation in moist Petri dishes. Using the data on mycelium yield (in liquid culture) and conidial production (by dry mycelium) it is calculated that the sucrose (3.5%)/yeast extract (3.5%) and the maltose (2%)/yeast extract (0.75%) media produce most conidia per media volume (an equivalent of 3.52–3.72×107 conidia/ml).
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    ISSN: 1573-0832
    Schlagwort(e): Beauveria bassiana ; entomopathogenic fungus ; gut infection ; histopathology ; Leptinotarsa decemlineata ; pathogenesis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract A study ofper os inoculated larvae was undertaken to determine if the entomopathogenic fungus,Beauveria bassiana, is able to infect the Colorado potato beetle,Leptinotarsa decemlineata, via the alimentary tract. Surface orper os inoculated larvae which were immediately surface sterilized post inoculation did not succumb to infection, whereas those larvae not sterilized became infected. Histological studies of fed or starved, agnotobiotic (with microbial flora) and axenic larvae revealed that conidia can germinate in the gut regardless of the presence of gut microflora. However, infection via the alimentary tract was never observed in fed larvae and only noted in a single starved individual. It is concluded that infections ofper os inoclated larvae occurred after surface contamination of the integument by viable conidia contained in the frass. The rate of food passage through the gut is probably important in preventingper os infections.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 11 (1988), S. 783-787 
    ISSN: 0935-6304
    Schlagwort(e): Gas chromatography, GC ; Recycle GC ; Peak distortion ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Extracolumn band broadening in multidimensional systems utilizing flow switching is clearly undesirable. In certain cases, i.e. capillary recycle gas chromatography, the success of an experiment is contingent on the minimization of pre- and post-column dispersion of the peaks. Knowledge of these sources of peak distortion is necessary to optimize the experimental design. A system that extracts statistical parameters from real chromatographic peaks is discussed and used to evaluate band broadening in a capillary recycle experiment.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 10 (1987), S. 244-247 
    ISSN: 0935-6304
    Schlagwort(e): Capillary gas chromatography ; Coffee aroma ; Pattern recognition ; Gas phase extraction ; Mass spectrometry ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The aim of the study was to evaluate changes in the aroma of coffee that has been exposed to heat for some time. Coffee grinds were extracted with water. The coffee was kept hot and sampled periodically using a continuous gas phase extraction method. Gas chromatography/mass spectrometry was used to follow changes in chromatographic profiles. Data were subjected to pattern recognition. About 20 substances were found that significantly changed when exposed to heat.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 13 (1990), S. 74-77 
    ISSN: 0935-6304
    Schlagwort(e): Liquid chromatography ; Nicotine and metabolites ; Complexation with Meldrums acid ; Urine analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    facet.materialart.
    Unbekannt
    In:  CASI
    Publikationsdatum: 2013-08-31
    Beschreibung: The status of recently completed and already ongoing technology developments, as well as some of the most important future developments of the European Space Agency are discussed. Among the subjects considered are Scientific Satellites, Columbus space station development, applications spacecraft for communications, Earth observation and meteorology, and the Ariane V and Hermes space transportation systems.
    Schlagwort(e): MECHANICAL ENGINEERING
    Materialart: NASA, Marshall Space Flight Center, The 23rd Aerospace Mechanisms Symposiums; p 1-16
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Publikationsdatum: 2013-08-31
    Beschreibung: The design and preliminary testing of a system for isolating microgravity sensitive payloads from spacecraft vibrational and impulsive disturbances is discussed. The Microgravity Isolation Mount (MGIM) concept consists of a platform which floats almost freely within a limited volume inside the spacecraft, but which is constrained to follow the spacecraft in the long term by means of very weak springs. The springs are realized magnetically and form part of a six degree of freedom active magnetic suspension system. The latter operates without any physical contact between the spacecraft and the platform itself. Power and data transfer is also performed by contactless means. Specifications are given for the expected level of input disturbances and the tolerable level of platform acceleration. The structural configuration of the mount is discussed and the design of the principal elements, i.e., actuators, sensors, control loops and power/data transfer devices are described. Finally, the construction of a hardware model that is being used to verify the predicted performance of the MGIM is described.
    Schlagwort(e): MECHANICAL ENGINEERING
    Materialart: NASA-Lyndon B. Johnson Space Center, The 21st Aerospace Mechanisms Symposium 35-54 (SEE N87-29858 24-39); NASA-Lyndon B. Johns
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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