Zobrazeno 1 - 10
of 19
pro vyhledávání: '"C. J. Veltkamp"'
Publikováno v:
Proceedings of the Yorkshire Geological Society. 57:69-74
Summary Complete fossil crinoids are well known from the Much Wenlock Limestone Formation (Silurian, Wenlock, Homerian), but are only common in the Dudley area of the West Midlands. Elsewhere, Wenlock crinoids are preserved as disarticulated ossicles
Autor:
C. J. Veltkamp, L Macchi
Publikováno v:
Geological Journal. 20:281-285
A polycrystalline grain of granitic composition with compound feldspar and quartz overgrowths is described from the continental Helsby Sandstone Formation (Triassic; Sherwood Sandstone Group) of the Cheshire Basin, northwest England. Overgrown phases
Publikováno v:
Materials Science and Technology. 22:1316-1324
A scanning electron microscope (SEM) study was conducted of α alumina scales developed on the surface of FeCrAl alloys during high temperature oxidation, using backscattered electron imaging, cathodoluminescence (CL) imaging, electron backscatter di
Publikováno v:
Journal of Natural History. 34:341-353
Gyrodactylus rasini from Xiphophorus helleri Heckel, 1848 x X. maculatus (Gunther, 1866) hybrids and museum specimens previously identified as Gyrodactylus bullatarudis Turnbull, 1956 sensu Harris (1986), also from Xiphophorus hybrids, are compared w
Autor:
Trevor A. Norton, B. Banks, C. J. Veltkamp, Richard C. Thompson, C. V. Howard, J. Pope, Stephen J. Hawkins
Publikováno v:
Aquatic Microbial Ecology. 16:199-204
Confocal laser scanning rnicroscopy (CLSM) was used to examine living organisms within marine biofilms growing on microscope slides and on natural opaque and uneven substrata such as rocks and shells. The results were compared to images of identical
Autor:
C. J. Veltkamp, G. Russell
Publikováno v:
Nordic Journal of Botany. 17:331-336
A salt tolerant ecotype of Scenedesmus armatus from the Baltic Sea is reported. Salinity treatments also reveal variable plasticity of several morphological features of this alga The problem of drawing a sharp distinction between stable and plastic a
Publikováno v:
Hydrobiologia. 288:33-38
Freeze dehydration provides instant immobilisation and fixation of living materials to capture particular events and avoids the need for dehydration through an ethanol series for SEM viewing. Examples of the technique are given from freshwater epiphy
Autor:
J. E. Perez, C. J. Veltkamp, James G. C. Hamilton, R. D. Ward, M. D. Feliciangeli, M. J. Dougherty, A. L. Falcao
Publikováno v:
Bulletin of Entomological Research. 83:437-445
Following the examination of 53 Lutzomyia spp., seven Phlebotomus spp. and five Sergentomyia spp. (Diptera: Psychodidae) new observations are recorded on the presence of pheromone disseminating structures on the tergites of male phlebotomine sandflie
Publikováno v:
Experientia. 46:517-520
A spontaneous mutant ofP. anserina isolated by screening for benomyl resistance exhibited a diurnal growth rhythm dependent on light-dark cycles. The rhythmic character, the benomyl resistance and a growth rate reduced to 50% of that of the wild type
Publikováno v:
Journal of helminthology. 74(2)
Cystacanths of the acanthocephalan, Bolbosoma vasculosum Rudolphi 1819, were found to be encapsulated in the connective tissues of the viscera of the black scabbard fish, Aphanopus carbo and oceanic horse mackerel, Trachurus picturatusfrom Madeira, A