Search results for "iva"

Ortho -Functionalized Aryltetrazines by Direct Palladium-Catalyzed C−H Halogenation: Application to Fast Electrophilic Fluorination Reactions

2016

International audience; A general catalyzed direct C-H functionalization of s-tetrazines is reported. Under mild reaction conditions, N-directed ortho-C-H activation of tetrazines allows the introduction of various functional groups, thus forming carbon-heteroatom bonds: C-X (X=I, Br, Cl) and C-O. Based on this methodology, we developed electrophilic mono- and poly-ortho-fluorination of tetrazines. Microwave irradiation was optimized to afford fluorinated s-aryltetrazines, with satisfactory selectivity, within only ten minutes. This work provides an efficient and practical entry for further accessing highly substituted tetrazine derivatives (iodo, bromo, chloro, fluoro, and acetate precurso…

Opiskelijoiden motivaatio ja siihen vaikuttavat tekijät selkärangattomien peruslajintuntemuksen kurssilla

2017

Lajintuntemustaidot ovat tärkeä bio- ja ympäristötieteiden alojen ammattilaisten osaamisalue. Lajintuntemuksella on myös merkitys osana laajempaa luonnontuntemusta, sillä esimerkiksi ekosysteemien rakenteen ja toiminnan ymmärtäminen ilman lajintuntemusta olisi hankalaa. Lajintuntemustaitojen on todettu heikentyneen luonnontieteiden korkeakouluopiskelijoilla, minkä lisäksi lajintuntemuksen opiskelu korkeakouluissa on todettu yllättävän vaikeaksi. Kaikki opiskelijat eivät koe lajintuntemustaitojen olevan edes tärkeitä tai kiinnostavia. Lajintuntemuksen opiskelua tulisikin kehittää siten, että opiskelijoiden motivaatio paranisi tieteellisesti, sisällöllisesti ja menetelmällisesti laadukkaalla …

AMMORTIZZATORI SOCIALI E NUOVE PROSPETTIVE DI WELFARE

In linea con la costruzione di un Modello sociale europeo e con i principi di flexicurity e lotta all’esclusione sociale elaborati nel quadro della Strategia Europa 2020, lo studio ripercorre le tappe dell’auspicato processo di razionalizzazione/universalizzazione del sistema degli ammortizzatori sociali in Italia, al fine di conciliare le istanze di flessibilità del mercato del lavoro con un incremento della sicurezza sociale e dell’occupabilità. In particolare, si analizzano le rilevanti modifiche introdotte dalla legge n. 92 del 2012 (cd. Riforma Fornero), nonché quelle proposte, a distanza di neanche due anni, nell’ennesimo percorso di riforma prefigurato all’interno del cd. Jobs Act , …

Gli strumenti di conciliazione nella prassi: analisi su un campione di contratti collettivi aziendali

2020

Individuare le vie verso un efficiente sistema di work-life balance è questione complessa e impone di considerare molteplici fattori, tra cui il ruolo strategico che può assumere la contrattazione collettiva nell’integrazione delle misure adottate a livello normativo, perfezionando la disciplina con diritti mirati o per meglio garantire l’attuazione di quelli esistenti. Fino a che punto, però, i contratti collettivi raggiungano nei fatti l’ambizioso obiettivo di potenziare i risultati in questa direzione è ciò che si intende meglio indagare, pur senza pretesa di esaustività. Il presente contributo si concentra sull’analisi dei contenuti di un campione di contratti collettivi di secondo live…

Inspiratory Muscle Strength and Cardiorespiratory Fitness Association With Health-Related Quality of Life in Healthy Older Adults

2021

The main purpose of this study was to explore similarities and differences in the association between two capabilities affecting the cardiorespiratory system (overall and multifactorial cardiorespiratory fitness and inspiratory muscle strength) and the health-related quality of life (HRQoL), in a group of active healthy seniors. Sixty-five individuals (age, 73.01 ± 5.27 years; 53 women) who participated regularly in a multicomponent training program completed the EuroQol 5D-5L questionnaire, the 6-min walking test (6MWT), and the maximum inspiratory pressure test (MIP). Non-parametric correlations (Spearman's rho) were conducted to analyze the association between HRQoL indices (EQindex and …

A learning organization : machine or human?

2001

Agronomical evaluation of Sicilian biotypes of Lavandula stoechas L. spp. stoechas and analysis of the essential oils

2015

The aim of this study was to characterize wild lavender, which was collected in three different areas of Sicily (Italy),according to agronomic and chemical evaluation. The collection sites were located in Pantelleria island, Partinico (a warm sub-area of Lauretum) and Castelbuono (a middle sub-area of Lauretum). All the populations were identified as Lavandula stoechas L. ssp. stoechas. Essential oils were extracted by hydrodistillation and analyzed by gas chromatography– flame ionization detector (GC–FID) and GC–mass spectrometry (GC–MS). GC–FID and GC–MS analyses permitted the identification of 101 components from the essential oils. We analyzed only the flowers and leaves of L. stoechas …

Evaluation of biocidal potential of some plant species from the Mediterranean wild flora

Essential oil crops for sustainable agriculture - A review

2009

Multifunctionality and diversification of farming systems, integration of agricultural practices both inter se and with the non-agricultural productive systems operating on the territory, biodiversity safeguards, and reduction in off-farm inputs, are key factors for all modern development strategies in agricultural areas. Such issues are valid worldwide, but are especially true in areas in which the cultivation of the more widespread and “classical” crops is constrained by factors of varying degree and importance. In Mediterranean areas, where many environmental and economic factors often reduce rural areas to marginal conditions, the search for new crop opportunities has become one of the …

Study of quantitative and qualitative variations in essential oils of Sicilian oregano biotypes

2015

Essential oil (EO) was extracted using hydrodistillation from samples of Origanum vulgare subspecies hirtum (Link) Ietswaart, gathered from the wild in various parts of Sicily, Italy; GC-FID and GC-MS analyses were subsequently performed. The aim of the study was to analyze the relationship between essential oil yields and the geographical distribution of oregano wild populations based on variations in environmental factors as collection sites. Moreover, the purpose was to group Origanum vulgare subspecies hirtum biotypes according to the chemical composition of the EO. The seven principal components in the EO was thymol (24.0–54.4%), γ-terpinene (9.8–30.5%), ρ-cymene (5.2–18.7%), α-terpine…