Search Results - "Norton, R.A."

Stable isotopes revisited: Their use and limits for oribatid mite trophic ecology by Maraun, M., Erdmann, G., Fischer, B.M., Pollierer, M.M., Norton, R.A., Schneider, K., Scheu, S.

“…In this review we summarize our knowledge of using stable isotopes ( 15N/ 14N, 13C/ 12C) to better understand the trophic ecology of oribatid mites. Our aims…”
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Collohmannia johnstoni n. sp. (Acari, Oribatida) from West Virginia (U.S.A.), including description of ontogeny, setal variation, notes on biology and systematics of Collohmanniidae by Norton, R.A., Sidorchuk, E.A.

“…Collohmannia (Collohmanniidae) is a genus of physically large oribatid mites with low extant diversity and high endemism. It includes the only species outside…”
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The 20th anniversary of a model mite: A review of current knowledge about Archegozetes longisetosus (Acari, Oribatida) by Heethoff, M., Bergmann, P., Laumann, M., Norton, R.A.

“…With about 10,000 described species and densities reaching 400,000 ind/m2, the Oribatida (without Astigmata) represent the most prevalent group of soil mites…”
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A longitudinal study of Salmonella and Campylobacter jejuni isolates from day of hatch through processing by automated ribotyping by McCrea, B A, Macklin, K S, Norton, R A, Hess, J B, Bilgili, S F

“…Comparisons of bacterial populations over long periods of time allow researchers to identify clonal populations, perhaps those responsible for contamination of…”
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Bacterial levels of pine shavings and sand used as poultry litter by Macklin, K.S, Hess, J.B, Bilgili, S.F, Norton, R.A

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Recovery and genetic similarity of Salmonella from broiler house drag swabs versus surgical shoe covers by McCrea, B.A, Norton, R.A, Macklin, K.S, Hess, J.B, Bilgili, S.F

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An Evaluation of Plant Growth and Development under Various Daily Quantum Integrals by Warrington, I.J, Norton, R.A

“…Plants of chrysanthemum [Dendranthema × grandiflorum (Ramat.) Kitamura], radish (Raphanus sativus L.), corn (Zea mays L.), and cucumber (Cucumis sativus L.)…”
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Trophic niche differentiation in soil microarthropods (Oribatida, Acari): evidence from stable isotope ratios (15N/14N) by Schneider, Katja, Migge, Sonja, Norton, Roy A., Scheu, Stefan, Langel, Reinhard, Reineking, August, Maraun, Mark

“…The large number of animals that coexist in soil without any clear niche differentiation has puzzled biologists for a long time. We investigated stable isotope…”
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Planewave expansion methods for photonic crystal fibres by Norton, R.A., Scheichl, R.

“…Photonic crystal fibres are novel optical devices that can be designed to guide light of a particular frequency. In this paper the performance of planewave…”
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Sterol phylogenesis and algal evolution by Nes, W.D. (Plant and Fungal Lipid Research, Richard B. Russell Research Center, Athens, GA), Norton, R.A, Crumley, F.G, Madigan, S.J, Katz, E.R

“…The stereochemistry of several sterol precursors and end products synthesized by two fungal-like micro-organisms Prototheca wickerhamii (I) and Dictyostelium…”
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Gerdia n. gen. from eastern North America, with redescription of the type species, Porobelba parki Jacot, 1937 (Acari, Oribatida, Damaeidae) by Miko, L., Norton, R.A.

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Moisture content and moisture quantity of sweated chicken eggs in 2 storage environments by Gradl, J. A., Curtis, P. A., Keener, K. M., Macklin, K. S., Norton, R. A.

“…There are instances where shell eggs may be moved from refrigeration into ambient temperature with high humidity, such as before wash and during…”
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Do oribatid mites live in enemy-free space? Evidence from feeding experiments with the predatory mite Pergamasus septentrionalis by Peschel, Kerstin, Norton, Roy A., Scheu, Stefan, Maraun, Mark

“…To examine whether their strongly hardened cuticle permits adult oribatid mites (Acari) to live in enemy-free space, we investigated (1) if Pergamasus…”
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An homage to Prof. Dr. Gerd Alberti (1943-2016) by Di Palma, A., Krantz, G.W., Lindquist, E.E., Norton, R.A.

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Where are the decomposers? Uncovering the soil food web of a tropical montane rain forest in southern Ecuador using stable isotopes (15N) by Illig, Jens, Langel, Reinhard, Norton, Roy A., Scheu, Stefan, Maraun, Mark

“…Trophic relationships among animals, plants and microflora are the basis for the construction of terrestrial and aquatic food webs, but both the structure and…”
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First report of phoresy by an oribatid mite (Trhypochthoniidae: Archegozetes magnus) on a frog (Leptodactylidae: Engystomops pustulosus) by Beaty, Lynne E, Esser, Helen J, Miranda, Roberto, Norton, Roy A

“…Numerous adults and some juveniles of the oribatid mite Archegozetes magnus (Trhypochthoniidae) were collected from a single adult male túngara frog,…”
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Efficacy of different anticoccidials against experimental coccidiosis in large white turkeys by Cabel, M C, Norton, R A, Yazwinski, T A, Waldroup, P W

“…Two trials were conducted to compare the efficacy of currently approved anticoccidials for turkeys against challenge using a field isolate of mixed Eimeria…”
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Evaluation of different plate media for direct cultivation of Campylobacter species from live broilers by Potturi-Venkata, L-P, Backert, S, Lastovica, A J, Vieira, S L, Norton, R A, Miller, R S, Pierce, S, Oyarzabal, O A

“…Accurate identification and optimal culturing procedures for Campylobacter spp. from live broilers are needed for epidemiological studies. Because there is no…”
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Effects of In-House Composting of Litter on Bacterial Levels by Macklin, K.S., Hess, J.B., Bilgili, S.F., Norton, R.A.

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Symposium: agro-terrorism: biological threats and biosecurity measures. Food security issues--a potential comprehensive plan by Norton, R.A

“…The need for a comprehensive plan to protect the food production system has emerged as a critical issue over the last several years. To address this need, a…”
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