Search results for "EES"
showing 10 items of 2276 documents
Central limit theorem for bifurcating Markov chains under L 2 -ergodic conditions
2021
Bifurcating Markov chains (BMC) are Markov chains indexed by a full binary tree representing the evolution of a trait along a population where each individual has two children. We provide a central limit theorem for additive functionals of BMC under L 2-ergodic conditions with three different regimes. This completes the pointwise approach developed in a previous work. As application, we study the elementary case of symmetric bifurcating autoregressive process, which justify the non-trivial hypothesis considered on the kernel transition of the BMC. We illustrate in this example the phase transition observed in the fluctuations.
Dielectrophoretic trapping and Raman spectroscopy of fluorescent oligonucleotides
2016
Nanotiede kasvaa edelleen tutkimusalana nopeasti, ja sille löytyy lukematon määrä sovelluskohteita. Sen vahvuutena on poikkitieteellisyys fysiikan, kemian ja biologian kesken, jotka kaikki tutkivat atomitason ilmiöitä. Näiden ilmiöiden tutkiminen ja soveltaminen vaatii paljon erilaisia, sofistikoituneita menetelmiä ja työkaluja, joilla voidaan valmistaa ja karakterisoida erilaisia nanopartikkeleita ja -rakenteita. Joissain tapauksissa vaaditaan jopa yksittäisten molekyylien tai atomien manipulointia nanometritasolla. DNA on yksi mielenkiintoisista nanotieteen tutkimuskohteista. Se on elämän kannalta merkittävä molekyyli, sillä se pitää sisällään elävän organismin rakenteellisen ohjeen. DNA:…
Synthesis, structure and photophysical properties of a highly luminescent terpyridine-diphenylacetylene hybrid fluorophore and its metal complexes
2015
A new fluorescent terpyridyl-diphenylacetylene hybrid fluorophore 4′-[4-{(4-methoxyphenyl)ethynyl}phenyl]-2,2′:6′,2′′-terpyridine, L, was synthesized via Sonogashira cross-coupling of 4′-(4-bromophenyl)-2,2′:6′,2′′-terpyridine and 4-ethynylanisole in the presence of Pd(PPh3)4/CuI as a catalyst. The solid state structure of L shows a trans arrangement of pyridine nitrogen atoms along the interannular bond in the terpyridine domain. Five transition metal complexes of L, {[FeL2](CF3SO3)2 (1), [ZnL2](ClO4)2 (2), [CdL2](ClO4)2 (3), [RuL2](PF6)2 (4), and PtMe3IL (5)}, have also been synthesized and characterized by spectroscopic methods and single crystal X-ray analysis. The X-ray crystal structu…
Aromaattiset amidifoldameerit
2015
Pro gradu -tutkielman kirjallinen osa keskittyy aromaattisiin, amidisidoksellisiin foldameereihin ja erityisesti amidi-, imidi- ja hydratsidifoldameereihin. Synteesien ja menetelmien sijaan osuudessa on paneuduttu foldameerien laskostumiseen vaikuttaviin tekijöihin, kuten vetysidoksiin, kiraaliseen induktioon ja kompleksoitumiseen. Tämän lisäksi myös foldameerien solubiologista vuorovaikutusta on tuotu esiin. Kokeellinen osa keskittyy kahden aromaattisen amidifoldameerin synteeseihin ja niistä saatujen tuotteiden kiteyttämisiin ja kiderakenteisiin. Foldameerit laskostuivat testatuissa, polaarisissa liuottimissa ja muodostivat sekä intramolekulaarisia että intermolekulaarisia vetysidoksia. L…
The influence of somatic cell count on sheep milk composition and cheese-making properties
2005
Somatic cell count (SCC) is an important tool for monitoring intramammary infections in dairy cows. However, systematic generalization of this decision rule is not easy in small ruminants. Determination of SCC in sheep milk is important for the processors of milk (indicator of quality), for breeders (mastitis indicator) and could be useful for selection as well. SCC value can be affected by some non-infective factors such as breed, stage of lactation, parity, type of lambing, type of milking, etc. (Bergonier et al., 1994), as well the health status of the udder (Fruganti et al., 1985; Ranucci et al., 1988). In addition, EC Directive 92/46, which regulates the production and commercialisatio…
Microbiological characterization of the biofilms of wooden shelves used for ripening of traditional raw milk cheeses produced in Sicily (South Italy).
The production of artisanal Sicilian cheeses is generally carried out with wooden equipment. For centuries, wood has been the main material used in cheese making due to its availability, low cost and resistance over time. Among dairy wooden equipment, the wooden vat used for milk curdling plays a role of paramount importance to inoculate the bulk milk with desired lactic acid bacteria (LAB) responsible for the acidification of the curd. In the last few years, the biofilms associated to these containers have been object of study of different research groups, mainly Italian and French, but so far, very little is known about the microbiological characteristics of the wooden shelves used for ch…
New chemiometric technique applied to traceability of Sicilian honey of Sulla (Hedysarum coronarium L.)
The consumers have an increasing interest about food traceability with respect to safety, quality and typicality issues. Food traceability is an important issue in food safety and quality control, with impacts on food security, its quantity and overall availability. Furthermore, the possibility of tracing the origin of foodstuff is assuming an increasingly important role at the legislative level, as a tool that may allow to prove on product authenticity and to control adulteration. So, establish systems to trace food products through specified stages of production, processing and distribution play a key role also to ensure food safety. In the last years, several of analytical techniques hav…
Recent advances in the application of microbial transglutaminase crosslinking in cheese and ice cream products: A review
2018
Microbial transglutaminase (MTGase) has been currently utilized to form new food structures and matrices with high physicochemical stability. Incorporation of this multi-functional enzyme into structural composition of milk protein-based products, such as cheese and ice cream, can not only be a successful strategy to improve their nutritional and technological characteristics through intramolecular cross-linking, but also to reduce the production cost by decreasing fat and stabilizer contents. The recent research developments and promising results of MTGase application in producing functional formulations of cheese and ice cream with higher quality characteristics are reviewed. New interest…
Protection of Trees against Lightning Strikes as a Measure to Prevent Fires and Loss of Human Life
2021
Lighting strikes have been the catalyst of massive uncontrolled fires in areas of combustible vegetation. In some regions, lightning strikes may be a relatively unusual occurrence (e.g., California), but instead they seem to have become a major contributor to the propagation of wildfires, as a byproduct of climate change. Given such unusual weather, wildfires originating from lightning are an increasing threat. In this paper, the authors discuss the withstand capability of trees against lightning and introduce a proactive approach to prevent wildfires by the deployment of tree lighting protection systems (TLPS) to protect forested areas, where deemed necessary by the tree risk assessment.
Enseñanza de las ciencias : revista de investigación y experiencias didácticas
2014
RESUMEN Se ha realizado un estudio empírico con una muestra de profesores de Magisterio de la Universidad de Valencia para analizar sus preconcepciones y actitudes respecto a la incorporación de la sostenibilidad en la docencia de sus asignaturas. La metodología utilizada conforma una estructura descriptivo-exploratoria y evaluativa basada en un diseño de encuesta. Los datos objetivos nos permiten conocer la situación del profesorado en relación a la introducción de la sostenibilidad en las titulaciones de Maestro de Educación Infantil y Maestro de Educación Primaria, y el desarrollo de competencias para la sostenibilidad pertinentes. SUMMARY An empirical study has been done with a sample o…