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  • Diptera  (6)
  • Onion fly  (4)
  • Nuclear reactions  (3)
  • intracranial pressure  (3)
  • 1
    Digitale Medien
    Digitale Medien
    Differential cross sections for elastic π^+/-d scattering at 65 MeV
    Amsterdam : Elsevier
    Nuclear Physics, Section A 392 (1983), S. 217-231 
    Details
    ISSN: 0375-9474
    Schlagwort(e): Nuclear reactions
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(83)90123-9
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  • 2
    Digitale Medien
    Digitale Medien
    Differential cross section for elastic π^+/- helium isotopes scattering from 25 to 65 MeV
    Amsterdam : Elsevier
    Nuclear Physics, Section A 426 (1984), S. 542-556 
    Details
    ISSN: 0375-9474
    Schlagwort(e): Nuclear reactions
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(84)90163-5
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  • 3
    Digitale Medien
    Digitale Medien
    The γ-decay of two-particle states in ^2^1^0Bi
    Amsterdam : Elsevier
    Nuclear Physics, Section A 205 (1973), S. 145-167 
    Details
    ISSN: 0375-9474
    Schlagwort(e): Nuclear reactions
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(73)90126-7
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  • 4
    Digitale Medien
    Digitale Medien
    A rodent model of infusion brain edema: Methodology and pathophysiological effects of saline and protein infusions (1990)
    Springer
    Acta neurochirurgica 105 (1990), S. 158-168 
    Details
    ISSN: 0942-0940
    Schlagwort(e): Brain edema ; cerebral blood flow ; brain tissue hydraulic resistance ; somatosensory evoked potential ; intracranial pressure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary To evaluate the potency of putative secondary mediators of brain edema and their possible contribution to edema related brain dysfunction an infusion model of brain edema was developed in rats. 100 ul of fluid (saline, 20% nonautologous protein) was infused over one hour into the left forebrain white matter through a stereotaxically placed (+ 1.2 mm ant to bregma, 3 mm lateral and 2.9 mm depth) 25 G needle. Brain tissue hydraulic resistance (Rt), regional cerebral blood flow (rCBF), cortical somatosensory evoked potentials (SEPs) and intracranial pressure (ICP) (intraventricular needle) were monitored during the infusion and rCBF CO2 reactivity (hydrogen clearance), local brain water content (microgravimetry), BBB integrity (Evans Blue 2%) and brain histology (H & E, Solochrome-cyanin) were evaluated after the infusion. Saline infusates caused no physiological dysfunction despite ipsilateral expansion and vacuolation of the subcortical white matter, separation of axonal bundles and a significant decrease (p=3.8×10−5)in local subcortical tissue specific gravity. Cortical histology and specific gravity adjacent to the infusion locus were normal. Rt significantly decreased (p=6.5×10−4) during the infusion but there were only minor increases in ICP. Findings with 20% protein infusates were similar despite a focal 65% decrement in the rCBF CO2 reactivity adjacent to the infusion site. This study has shown that a simple and inexpensive model of infusion brain edema can be created in the rat and that it provides a useful model for assessing the physiological effects of mediator compounds in the infusate. Potential applications and methodological improvements for this model are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01670001
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  • 5
    Digitale Medien
    Digitale Medien
    The contribution of arachidonic acid to the aetiology and pathophysiology of focal brain oedema; studies using an infusion oedema model (1991)
    Springer
    Acta neurochirurgica 113 (1991), S. 57-68 
    Details
    ISSN: 0942-0940
    Schlagwort(e): Blood brain barrier ; cerebral blood flow ; intracranial pressure ; arachidonic acid ; brain oedema ; evoked potential
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Arachidonic acid solution (2 to 15 mg/ml) was infused into the right forebrain white matter of anaesthetised cats over three hours to evaluate its contribution to the genesis and pathophysiology of vasogenic brain oedema. The 0.6 ml infusion increased local white matter water content by a mean of 11.3 ml/100 g tissue but did not increase cortical water content. Histological studies revealed local expansion and trabeculation of the white matter with aggregations of granulocytic neutrophils in the venules and perivenular brain. The adjacent cortical cytoarchitecture was normal. The white matter around the infusion site was stained lightly and over a variable area (15–20 mm2) by intravenously administered Evans Blue dye 2%. Regional cerebral blood flow (rCBF) adjacent to the frontal infusion did not change significantly during the period of infusion and remained similar to rCBF in the contralateral hemisphere. Following the arachidonic acid infusion regional CBF CO2 reactivity was normal and three was no asymmetry of either cortical somatosensory evoked potential (SEP) or motor evoked potential (MEP) waveforms. The increase in brain water content and changes in the ICP and ICP related biodynamics (pressure-volume index, lumped craniospinal compliance and CSF outflow resistance) were similar to those seen following infusion of 0.6 ml saline. These studies suggest that free intraparenchymal arachidonic acid, at concentrations exceeding those occurring in most neuropathological conditions, can increase the normal brain parenchymal capillary permeability but does not disrupt focal cerebrovascular and electrophysiological function. The clinical implications of these findings are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01402116
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  • 6
    Digitale Medien
    Digitale Medien
    The role of bradykinin in the etiology of vasogenic brain edema and perilesional brain dysfunction (1992)
    Springer
    Acta neurochirurgica 115 (1992), S. 53-59 
    Details
    ISSN: 0942-0940
    Schlagwort(e): Bradykinin ; intracranial pressure ; evoked potentials ; cerebral blood flow ; brain edema ; blood brain barrier
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The feline infusion model of brain edema was used to evaluate the role of bradykinin in the etiology and pathophysiology of vasogenic brain edema. Bradykinin (3 or 90 ug in 600 μL saline) did not alter normocapnic regional cerebral blood flow (rCBF) nor induce specific changes in either the somatosensory (SEP) or motor (MEP) evoked potentials. The mean increases in ICP (from 4.5 to 16.1 mmHg) and peri-infusion white matter water content (from 69.4 to 79.8 ml/100 g tissue), mean decrease in lumped craniospinal compliance (from 0.040 to 0.014 ml/mmHg) and local histological changes were all similar to those after 600 μL saline infusion. The interstitial bradykinin infusion caused focal blood-brain-barrier (BBB) opening to Evans Blue dye and was chemotaxic for granulocytes. After the infusion there was a global loss of rCBF CO2 reactivity but there was no ischemia at normocapnia. These results show that bradykinin in brain edema fluid, at concentrations greater than those found in neuropathological conditions, can open the BBB of normal cerebral parenchymal capillaries and cause vascular dysregulation. In neuropathological conditions bradykinin may therefore potentiate formation of vasogenic brain edema but does not contribute to perilesional brain dysfunction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01400591
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  • 7
    Digitale Medien
    Digitale Medien
    Search for potent attractants of onion flies (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 1477-1488 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Delia antiqua ; onion fly ; Diptera ; Anthomyiidae ; food attractants ; host attractants ; microbial attractants ; Klebsiella pneumoniae ; bacteria ; Allium ; onion ; garlic ; chive
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Of various chopped vegetables tested,Allium spp. high in propyl-containing alkyl sulfides (e.g.,cepa group) caught the most onion flies in trapping tests in the field. Fly catches to chopped onion increased with bait quantity. Attractancy of chopped onion changed dramatically during aging in the field; catch increased over the first few days, peaked at ca. fivefold over fresh material by 3–5 days, and then declined sharply. This age-dependent increase in attraction was not seen for garlic (known to have antimicrobial properties) nor with chopped onion mixed with chopped garlic. These data suggested that attraction of onion flies to onions was strongly influenced by microbial activity associated with decomposing onions. The bacteriumKlebsiella pneumoniae was identified as a major colonizer of onions maximally attractive to onion flies. This increased attraction is not due to the previously reported microbially produced volatiles ethyl acetate and tetramethyl pyrazine.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00990317
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  • 8
    Digitale Medien
    Digitale Medien
    Pungent spices, ground red pepper, and synthetic capsaicin as onion fly ovipositional deterrents (1989)
    Springer
    Journal of chemical ecology 15 (1989), S. 719-730 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Onion fly ; Delia antiqua ; Diptera ; Anthomyiidae ; oviposition ; deterrent ; capsaicin
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract In laboratory choice experiments, the spices dill, paprika, black pepper, chili powder, ginger, and red pepper deterredDelia antiqua oviposition by 88–100%. Dose-response choice tests demonstrated that 1 mg of ground cayenne pepper (GCP) placed within 1 cm of artificial onion foliage reduced oviposition by 78%. A synthetic analog of capsaicin, the principal flavor ingredient of red peppers, deterred oviposition by 95% when present at 320 ppm in the top centimeter of sand (the ovipositional substrate). However, in no-choice conditions 10 mg GCP was not an effective deterrent. Sevana Bird Repellent and Agrigard Insect Repellent both use red pepper as a principal ingredient; at recommended field rates, neither of these materials was an effective ovipositional deterrent either in laboratory or field. Capsaicin-based materials do not appear to be candidates for onion maggot control via behavioral modification.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01014714
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  • 9
    Digitale Medien
    Digitale Medien
    Production of onion fly attractants and ovipositional stimulants by bacterial isolates cultured on onion (1989)
    Springer
    Journal of chemical ecology 15 (1989), S. 905-916 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Onion fly ; Delia antiqua ; Diptera ; Anthomyiidae ; Erwinia carotovora varcarotovora ; Klebsiella pneumoniae ; food attractant ; ovipositional stimulant ; dipropyl disulfide ; 2-phenylethanol ; pentanoic acid
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Decomposing onions at certain microbial successional stages produce potent volatile attractants and ovipositional stimulants of the onion fly,Delia antiqua (Diptera: Anthomyiidae). A reproducible source of these compounds was obtained by culturingErwinia carotovora var.carotovora (EC) on sterile onion tissue. In laboratory choice tests, EC-inoculated onion was more attractive thanKlebsiella pneumoniae (KP) cultured on onion, EC cultured on potato (a nonhost of onion fly), or the chemical synthetic baits dipropyl disulfide and an aqueous solution of 2-phenylethanol and pentanoic acid. Onion flies were mildly attracted to potato after inoculation with EC, but females did not accept EC-inoculated potato for oviposition. This work emphasizes that sources of semiochemicals may need to be defined microbiologically as well as physically and chemically.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01015186
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  • 10
    Digitale Medien
    Digitale Medien
    Influence of cage design on precision of tube-trap bioassay for attractants of the onion fly,Delia antiqua (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 435-440 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Delia (Hylemya) antiqua ; Diptera ; Anthomyiidae ; onion fly ; onion maggot ; tube trap ; insect attractants
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Responses of onion flies,Delia antiqua, to known attractants were measured in the laboratory with a novel tube-trap bioassay. The relative numbers of flies caught in tube traps baited with enzymatic yeast hydrolysate, brewer's yeast, andn-dipropyl disulfide were similar to those obtained previously with cone traps in the field. Changing the shape of the bioassay cage from a cuboid to a cylinder decreased the experimental error obtained from analysis of variance, as did rotating the floor of the circular cage. This bioassay should be useful in evaluating attractants for other insects that orient along the substrate.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00989554
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