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Showing 1 to 20 of 25 for “"Tenax"”.
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Environmental physiology of two hoverflies, "Eristalis tenax" and "E. pertinax"
Eristalis tenax and E. pertinax are two closely related Scottish hoverflies that share various ecological features, such as feeding sources, but differ in others (e.g. only adult E. tenax overwinter). The physiological performances and behaviour of these flies were studied in relation to the …
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Efekt zkušeností a květních vlastností na projev preferencí a věrnosti u Eristalis tenax
… and constancy of common drone fly Eristalis tenax L (Syrphidae) as a function of two floral traits, colour and size, and as a function of experience. I did so by monitoring visits and flights in arrays of artificial flowers. The hoverflies were of two origins: naïve (reared under laboratory …
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The science behind Tenax extractable concentrations and their use in evaluating environmental risk
… Desorption-based samplers, such as single-point Tenax extractions (SPTE), provide a clearer estimate of bioaccessibility than organic carbon normalization by serving as a sink for desorbing compound for the length of the extraction. In this way, SPTEs account for all the factors affecting …
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Harakeke (Phormium tenax) ecology and historical management by Maori: The changing landscape in New Zealand
Harakeke (Phormium tenax: Phormiaceae) is an important weaving resource for the indigenous Maori people of New Zealand. This research project investigates Maori knowledge of harakeke ecology and management practices prior to the early 20th century within the context of a study of relevant …
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Synthesis of Sustainable Antibacterial Materials by Surface Functionalisation of NZ Flax (Phormium tenax) Fibres and Hemp (Cannabis sativa) Hurd
… investigation of functionalisation of Phormium tenax (NZ flax) fibre (PTF) and hemp hurd core of Cannabis sativa (HH) through surface grafting of chitosan 1, a potent novel chitosan derivative 132 (selected for the excellent bioactivity from a set of O-amine-modified chitosans synthesised in …
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What is the best chemical approach to estimate the bioavailability of pyrethroid insecticides to benthic invertebrates?
… Solid phase microextraction (SPME) and Tenax are two commonly used bioavailability-based methods. While both SPME fiber and Tenax extractable concentrations can be correlated to tissue residues of aquatic species, the majority of this research (with a few exceptions) focuses on compounds …
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Some observations on oral protozoa of man
… The specific cultivation of Trichomonas tenax was explored in an effort to employ an improved experimental medium.</p><p>Trichomonas tenax and Endamoeba gingivalis are the only protozoans known to occur commonly in the human mouth. Distribution is cosmopolitan and there are no known …
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An On-line Test for Polycyclic Aromatic Hydrocarbons in the Flue Gas from Coal Combustion in an FBC System
… glass fiber filter, Teflon filter, and Tenax. The filters and Tenax were extracted by methylene chloride and hexane, respectively, followed by GC/MS analysis using the Selective Ion Monitoring (SIM) mode. The detection limits for each of the sixteen PAHs are as low as lppb. In this …
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A Study of the Behavior of Chlorine and Organic Compounds During Combustion in an AFBC System
… of organic compounds involved the use of a Tenax resin as an absorbent for the organic compounds as they were emitted from the combustor. A combined gas chromatography - mass spectrometry (GC-MS) technique was used for analysis. The behavior of chlorine was studied by collection of samples …
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The effect of protozoan grazers on the cycling of polychlorinated biphenyls (PCBs) in marine systems
… enhanced the diffusive uptake rate constant for Tenax resin and, by inference, protozoan grazers. In the second phase of this work, concentrations of surfactants, organic carbon and cells were monitored over time in protozoan cultures. The effects of bacterial growth substrate and protozoan …
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Novel mesoporous silicates as indoor air pollutant scavengers
… air pollutants were actively sampled onto (i) Tenax filled sampling tubes and subsequently analysed by thermal desorption gas chromatography mass spectrometry or (ii) chemically modified C₁₈ silica cartridges analysed by high performance liquid chromatography ultraviolet spectroscopy. A …
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Chemical Micro Preconcentrators Development for Micro Gas Chromatography Systems
… Moreover, the porous polymeric adsorbent Tenax TA in the film form was characterized, for the first time, for μPC application and shown to have similar properties to that of the granular form. Several μPC designs were experimentally evaluated for their performance in concentrating …
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Investigations on the taxonomy and the genetics of caldoactive bacteria
… seem rather different from the type strain T. tenax which also has some different physiological properties. An interesting feature of these strains was the contribution of sulphur to the mass spectra. Taxonomic groupings did not show a close relationship with source temperature and pH but …
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The effect of protozoan grazers on the cycling of polychlorinated biphenyls (PCBs) in marine systems
… enhanced the diffusive uptake rate constant for Tenax resin and, by inference, protozoan grazers. In the second phase of this work, concentrations of surfactants, organic carbon and cells were monitored over time in protozoan cultures. The effects of bacterial growth substrate and protozoan …
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Indirect Detection of Explosive Vapours by Thermal Dissociation Cavity Ring-Down Spectroscopy
… largely due to poor sample recoveries from the Tenax traps used. The second explosive detection technique exploited radicals generated during the thermal decomposition of triacetone triperoxide (TATP), a peroxide explosive, for detection. These radicals were amplified via a peroxide radical …
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Monochloracetat in der Umwelt
… Derivatisierung zum Pentafluorbenzyloxim auf Tenax und anschließende gas-chromatographische Analyse lieferten überzeugende Ergebnisse. Mit der entwickelten Methode konnte erstmals CAA in der Atmosphäre quantifiziert werden: die gefundenen Tagesmittelwerte lagen – je nach Wetter – zwischen 0,2 …
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Are droneflies batesian mimics of honeybees?
… similarities between the dronefly Eristalis tenax and the honeybee in the flight speed, time spent hovering and routes taken between flowers. Analysis of pollen in faeces indicated that the pollen diets of droneflies were more similar to those of honeybees than to other hoverflies and …
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Phosphofructokinases from extremely thermophilic microorganisms
… to those PPᵢPFKѕ from the archaeal Thermoproteus tenax, bacterial Mycobacterium tuberculosis and Amycolatopsis methanolica, and the ATP-PFK from Streptomyces coelicolor, all of which belong to group III PFKѕ. A biochemical comparison between the Dictyoglomus native and recombinant enzymes …
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