Search results for " environmental scanning electron microscopy"

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Soil microbial biomass carbon and fatty acid composition of earthworm Lumbricus rubellus after exposure to engineered nanoparticles

2014

none 6 no First Online: 14 October 2014 The aim of this work was to investigate the effect of engineered nanoparticles (NPs) on soil microbial biomass C (MBC) and on earthworm Lumbricus rubellus. An artificial soil was incubated for 4 weeks with earthworms fed with vegetable residues contaminated by NPs, consisting of Ag, Co, Ni and TiO2. After the treatments, soils were analysed for MBC and total and water soluble metal-NPs, whereas earthworms were purged for 28 days and then analysed for fatty acids (FAs) and total metal-NPs. Longitudinal sections of earthworms were investigated by environmental scanning electron microscopy (ESEM), equipped with energy-dispersive X-ray spectroscopy (EDS),…

Degree of unsaturationEnvironmental scanning electronmicroscopybiologyChemistryMicroorganismEarthwormSettore AGR/13 - Chimica AgrariaSoil ScienceEngineered nanoparticles; Microbial biomass carbon; Environmental scanning electronmicroscopyLumbricus rubellusbiology.organism_classificationMicrobiologyEicosapentaenoic acidEngineered nanoparticles Microbial biomass carbon Environmental scanning electron microscopy Fatty acids unsaturation degreeEnvironmental chemistryEngineered nanoparticlesBotanySoil waterComposition (visual arts)Microbial biomass carbonSoil fertilityAgronomy and Crop Science
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Stigma morphology inAylosterasubg.Mediolobivia(Cactaceae) and its importance for systematic investigation

2013

The stigma of 31 taxa of Aylostera (Cactaceae) was studied using environmental scanning electron microscopy. Seven stigma types could be defined, based on the degree of fusion of the stigmatic lobes and, when these are completely separated (types I and II), their orientation. Four types (types IV, V, VI and VII) are present only in Aylostera subg. Mediolobivia, two of which (types IV and VII) are species-specific. Stigma morphology was found to be a good diagnostic character in Aylostera subg. Mediolobivia, allowing in some cases to distinguish species that had been confused previously. The stigmatic types here defined seem apt to characterize natural groups within the subgenus and are usef…

TaxonSettore BIO/03 - Botanica Ambientale E ApplicataBotanyAylostera Mediolobivia Cactaceae stigma morphology environmental scanning electron microscopySpecies identificationStigma (botany)Plant ScienceBiologySubgenusEcology Evolution Behavior and SystematicsPlant Biosystems - An International Journal Dealing with all Aspects of Plant Biology
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