Search results for "sun"
showing 10 items of 935 documents
On the use of multi-parameter free energy relationships: the rearrangement of (Z)-arylhydrazones of 5-amino-3-benzoyl-1,2,4-oxadiazole into (2-aryl-5…
2010
Abstract By using a multi-parameter approach (a combination of Hammett/Ingold-Yukawa-Tsuno/Fujita-Nishioka free energy relationships) the mononuclear rearrangements of heterocycles (MRH) rates for five new ortho-substituted and ten new di-, tri-, or tetra-substituted (Z)-arylhydrazones of 5-amino-3-benzoyl-1,2,4-oxadiazole into the relevant (2-aryl-5-phenyl-2H-1,2,3-triazol-4-yl)ureas (in dioxane/water and in a large range of pS+ values) have been related to the electronic and proximity effects exerted by the present substituents, also considering previous results on some mono meta- and para-substituted (Z)-arylhydrazones. In every case, excellent correlation coefficients have been calculat…
Unsaturated fatty acid bioavailability in growing rats fed low or adequate protein diets with sunflower or soybean oils
1993
Abstract The relationship of serum very low density lipoproteins (VLDL) to hepatic lipid composition was studied after 28 days of protein depletion to determine the interactions between dietary protein levels and the essential fatty acid (EFA) availability. This was examined in rats using a dietary combination of 20% or 2% casein with 5% vegetable oils, variable in their n-6:n-3 fatty acid ratios. Rats were divided into four groups, SFC (20% casein + 5% sunflower oil ); SFd (2% casein + 5% sunflower oil ); SC (20% casein + 5% soybean oil ); Sd (2% casein + 5% soybean oil ). Dietary protein depletion decreased phospholipid and protein concentrations in liver and VLDL, whereas triacylglycerol…
Water-Blown Polyisocyanurate Foams From Vegetable Oil Polyols
2008
Polyols with the hydroxyl value OHV from 290 to 318 mg KOH/g are synthesized from rapeseed, sunflower seed, flaxseed, or coconut oils by the way of their: (1) transesterification with triethanolamine or (2) amidization with diethanolamine. The influence of water as the blowing agent on the storage stability of the polyol premix system is assessed from values of the polyol premix system pH, acid value, and variations in such parameters as cream and gel time. Water-blown polyisocyanurate (PIR) foams (150 · II × 300; II—isocyanate index) characterized by good mechanical characteristics, dimensional stability at 70°C and at relative humidity RH = 95% as well as by a very low water absorbance, …
Synthesis of azamacrocycles via a Mitsunobu reaction
2005
Reaction of pernosylated diethylenetriamine and 2-substituted propane-1,3-diols in dry THF in the presence of triphenylphosphine and diisopropyl azodicarboxylate gives the corresponding protected 9-substituted 1,4,7-triazacyclodecanes. The Mitsunobu reaction was also used in the preparation of 3-substituted 1,5,9-triazacyclododecanes and macrocyclic pyridine derivatives.
Artesunate – An anti-malarial natural product derivative for cancer therapy
2015
Rilievi: Madonna col Bambino, l’Annunciazione e gli Evangelisti (Petralia Sottana, chiesa Madre di Maria SS. Assunta)
2011
Nella facciata laterale della chiesa Madre di Petralia Sottana sono apposte diverse formelle figurate, riferibili allo scultore lombardo Giorgio da Milano. Sebbene sia stato ipotizzato che questi rilievi facessero parte di una ancona posta all’interno della chiesa, è molto provabile che adornassero in origine il portico un tempo esistente sopra il portale principale.
Neoassunti e sviluppo delle competenze strategiche
2021
L’interesse della ricerca didattica anche in ambito internazionale converge sempre più sulla necessità di estendere la conoscenza dei fabbisogni formativi e professionali ad un’ampia gamma di competenze trasversali ritenute fondamentali per lo sviluppo personale e professionale del docente universitario. Quali competenze connotano il docente neoassunto oggi? Quali azioni e dispositivi di autovalutazione possono supportarne lo sviluppo professionale? Ci siamo proposti soprattutto l’obiettivo di comprendere la realtà della formazione dei neoassunti dando voce ai neoassunti e considerandoli una fonte di informazione strategica per leggere in maniera critica i processi attivati dalla somministr…
Accounting for the constructional behavior of "Fetch", "Find", "Gather" and "Reach"
2012
Este artículo se propone arrojar luz sobre los distintos tipos de realización construccional para los verbos "ir a por", "encontrar", "recoger" y "alcanzar", contrastándolos con "traer", "buscar", "reunir" y "extender" en la construcción ditransitiva y la construcción dativa. Con este fin, usaré la semántica léxica de Levin y las herramientas explicativas desarrolladas por el Modelo Léxico Construccional (MLC), propuesto por Ruiz de Mendoza y Mairal ("Levels"; "Constraints"). El MLC ha desarrollado una serie de restricciones internas y externas que definen las condiciones para la integración léxico-construccional o subsunción. Palabras clave: construcción ditransitiva, construcción dativa, …
Constraining the pass-band of future space-based coronagraphs for observations of solar eruptions in the FeXIV 530.3 nm “green line”
2017
This research has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 647214) and from the UK Science and Technology Facilities Council. Observations of the solar corona in the FeXIV 530.3 nm “green line” have been very important in the past, and are planned for future coronagraphs on-board forthcoming space missions such as PROBA-3 and Aditya. For these instruments, a very important parameter to be optimized is the spectral width of the band-pass filter to be centred over the “green line”. Focusing on solar eruptions, motions occurring along the line of sight will Doppler shift the line prof…
Crystal structure and absolute configuration of (4S,5R,6S)-4,5,6-trihydroxy-3-methylcyclohex-2-enone (gabosine H)
2017
The absolute configuration of the title compound, determined as 4S,5R,6S on the basis of the synthetic pathway, was confirmed by single-crystal X-ray diffraction. The molecule is formed by a substituted six-membered cyclohexene ring adopting an envelope conformation and substituted by carbonyl, methyl and hydroxyl groups. The supramolecular structure is mainly built by a combination of O—H⋯O and weaker C—H⋯O hydrogen bonds.