Search results for "Micro"
showing 10 items of 23412 documents
Sociāla faktora ietekme uz Hartinga strupastes Microtus hartingi uzvedību atklātā lauka testā
2022
Stress ir viens no vissvarīgākajiem vides faktoriem, kas var ievērojami mainīt indivīda uzvedību un noteikt viņa spējas pielāgoties videi. Šobrīd liels petījumu skaits ir vērsts uz stresa izraisošiem faktoriem, kuri sāk iedarboties uz īpatņi pēc dzimšānas. Maģistra darba ietvāros tika izpetīts kāda ietekme ir mātes sociālam stresam uz pēcnācēju fenotipu. Darbs tika veikts no 2018.gada 1. augusta līdz 2020.gada 1. martam. Eksperimentos tika izmantotas Hartinga strupastes pasuga Microtus hartingi lydius, kas dabīskos apstākļos veido monogāmas attiecības un ilgtermiņa sociālas saites. Tika veidotas komunālas grupas ar radnieciskām un neradnieciskām mātītēm. Lai novertētu pēcnācēju uzvedību tik…
Extraordinary Performance of Carbon‐Coated Anatase TiO 2 as Sodium‐Ion Anode
2015
The synthesis of in situ polymer‐functionalized anatase TiO2 particles using an anchoring block copolymer with hydroxamate as coordinating species is reported, which yields nanoparticles (≈11 nm) in multigram scale. Thermal annealing converts the polymer brushes into a uniform and homogeneous carbon coating as proven by high resolution transmission electron microscopy and Raman spectroscopy. The strong impact of particle size as well as carbon coating on the electrochemical performance of anatase TiO2 is demonstrated. Downsizing the particles leads to higher reversible uptake/release of sodium cations per formula unit TiO2 (e.g., 0.72 eq. Na+ (11 nm) vs only 0.56 eq. Na+ (40 nm)) while the …
Local mechanical properties by Atomic Force Microscopy nanoindentations
2008
The analysis of mechanical properties on a nanometer scale is a useful tool for combining information concerning texture organization obtained by microscopy with the properties of individual components- Moreover, this technique promotes the understanding of the hierarchical arrangement in complex natural materials as well in the case of simpler morphologies arising from industrial processes. Atomic Force Microscopy, AFM, can bridge morphological information, obtained with outstanding resolution, to local mechanical properties. When performing an AFM nanoindentation, the rough force curve, i.e., the plot of the voltage output from the photodiode vs. the voltage applied to the piezo-scanner, …
Annales des travaux des auditeurs de l'IHEDN 2009 : "Y a-t-il un retour du "soft power" dans les relations internationales ?
2009
CD rom; International audience
Biodegradation of organophosphorus pesticides by soil bacteria.
2009
A number of studies in the 1980s and 1990s showed that crop-protection products, applied to drained fields, could move downwards through the soil profile and to the groundwater. Organophosphorus insecticides (OPs) are used all over the world for crop protection, for other agricultural practices such as sheep dipping and, in aquaculture, for the control of sea lice. Ops besides showing a specific neurotoxicity and have also been related to various modern diseases, including Creutzfeldt–Jakob (CJD) and the Gulf War syndrome. Although OPs are less persistent than Organoclorine pesticides (OCs), they still constitute an environmental risks thus increasing the social concern about their levels i…
Land use effects on bacterial diversity in Mediterranean soils vulnerable to desertification
2021
The soil microbiota is recognized as key player in both diversity and productivity of terrestrial ecosystems and it is mandatory to include its role in soil quality evaluation. The bacterial communities in soils vulnerable to desertification can undergo perturbations by various human activities, such as unsustainable land use and management, and by climate change. Alteration in microbial diversity and composition are sentinels of the impact of environmental changes on soil quality. Within the LIFE Desert-Adapt project we analyze the soil bacterial diversity and composition across European Soils threatened by desertification in the southern Mediterranean regions (Italy, Spain and Portugal) a…
Biodegradation of pesticides by soil microflora
2006
Implication of pyoverdines in the interactions of fluorescent pseudomonads with soil microflora and plant in the rhizosphere
2008
International audience
Impact des modes de production économes en pesticides de synthèse sur la qualité microbiologique des sols viticoles
2022
La viticulture est un secteur d‘activité agricole stratégique pour la France carelle représente le 1er poste exportateur du secteur agroalimentaire pourseulement 3% de la SAU Française. Toutefois, elle est aussi une forteconsommatrice de produits phytosanitaires avec 20% des pesticides utilisés enFrance à elle seule, couplé aussi a une forte mécanisation. Tout ceci entraîne unedégradation de la qualité des sols, qu’elle soit physique (Quiquerez et al., 2008),ou biologique (Dequiedt et al., 2011). Une baisse importante de la biodiversitédu sol altère ses grandes fonctions d’intérêts telles que la décomposition de lamatière organique et la fourniture d’éléments minéraux, l’effet barrière auxp…
Solidarietà familiare tra mito e realtà: note minime su comparazione giuridica e microanalisi storica
2018
solidarità familiare, alimenti, microanalisi storica