Search results for "Tert"
showing 10 items of 1210 documents
Kanoninen kumous : Pentti Saarikosken 1960-luvun lyriikan poliittinen runousoppi
2015
Densities, Viscosities, and Refractive Indices of the Binary Systems Methyl tert-Butyl Ether + 2-Methylpentane, + 3-Methylpentane, + 2,3-Dimethylpent…
2000
This paper reports experimental densities, viscosities, and refractive indices of the binary systems methyl tert-butyl ether (MTBE) + 2-methylpentane, + 3-methylpentane, + 2,3-dimethylpentane, and + 2,2,4-trimethylpentane over the entire range of composition, at 298.15 K and atmospheric pressure. Excess molar volumes and viscosity deviations were evaluated from the experimental data. These excess or derived properties were fitted to the Redlich−Kister equation to estimate the binary interaction parameters. The experimental values of viscosity have been compared to values predicted by means of the GC−UNIMOD model.
Taste perception and integration
2016
Revue; IntroductionThe sense of taste is essential for the evaluation of food quality. It allows, at the level of the oral cavity, to evaluate the caloric content of the consumed food, to detect the presence of salt, and protect us against the ingestion of toxic molecules. Our gustatory system allows the perception of different food constituents as alkali metallic salts (salty), acids (sour), sugars (sweet), and bitter compounds. Umami is a different taste, arising from the perception of amino acids, such as l-glutamate, and 5′-ribonucleotides. Other taste qualities are still a matter of debate, including fat taste, corresponding to the taste of fatty acids (Khan and Besnard, 2009), metalli…
Lower ST-elevation myocardial infarction incidence during COVID-19 epidemic in Northern Europe
2020
We compared the ST elevation myocardial infarction (STEMI) incidence during COVID-19 pandemic (March 2020) to January-February 2020 and to same time period in earlier years 2017-2019 in five Nordic-Baltic tertiary centers. During 2017-2019, there were no marked differences in STEMI incidence between January, February and March. During 2020, there was an average drop of 32% in STEMI incidence in March. The isolation measures may decrease the risk for respiratory virus infection and contribute to the lower STEMI incidence and that we might benefit from firmer suggestions on hand hygiene and social distancing during flu season at least among high-risk individuals.
Heliodor, Etiòpiques VI 14-15: un cas únic de necromància a la novel·la grega antiga
2014
La tradició literària que hi ha al darrere de la novel·la d'Heliodor Teàgenes i Cariclea és abundant en obres i en gèneres, però especialment deutora de l'Odissea d'Homer. L'únic passatge de necromància de la novel·la grega antiga també presenta, i de manera molt evident i curiosa, aquesta intertextualitat, oferint importants punts en contacte amb la nékyia del cant XI de l'obra homèrica. Així mateix, remet als ritus egipcis que descriu Heròdot al llibre II de la seua Història i al d'Els perses d'Èsquil per convocar el fantasma de Darios. Es tracta d'un passatge singular amb motius de la literatura grega precedent. The literary tradition which underlies to the Heliodorus' roman Theagenes an…
The Translation of Nursery Rhymes into Spanish: A Methodological Framework
2018
El objetivo de esta tesis es el estudio de nursery rhymes (rimas infantiles) desde una perspectiva traductológica. La traducción de estas rimas anglosajonas se encuentra de una forma cada vez más extendida en español, en ejemplos escritos y audiovisuales, donde en ocasiones aparecen de forma intertextual y fragmentada. Para proponer una discusión teórica y un marco formal en este ámbito específico de investigación, se inicia la tesis con una contextualización de términos, con la intención de establecer la posición de las nursery rhymes en relación con la infancia, la literatura infantil y su traducción. Las características orales de las nursery rhymes (su origen, patrón rítmico común, music…
And the World Continues to Spin…: Secularism and Demystification in Good Omens
2018
Pratchett’s narratives tend to portray not only multicultural but also multireligious societies. In contrast to earlier writers of fantasy, however, Pratchett writes from a decidedly atheistic point of view, an issue Daniel Scott explores in depth in this chapter. He argues that co-authors Pratchett and Gaiman use Good Omens to perform what, following Rosemary Jackson’s theory of fantasy literature (1989), is a dual subversion; in using biblical prophecy to hold a mirror up to society, they also show the faults and cracks in the mirror itself, sometimes overtly, but mostly by implication. By reducing it to this level of intertextuality, they strip it of its higher or absolute metaphysical v…
Über die homogene und heterogene acetylierung von polyformaldehyd. 28. Mitteilung über polyoxymethylene1
1966
Die Acetylierung der Endgruppen eines hochmoleckularen Polyoxymethylendiols mit Essigsaureanhydrid wurde bei 200°C in Substanz sowie bei 135°C in Losung und in Suspension untersucht. Die Umsetzung ist in homogenem Medium innerhalb kurzer Zeit praktisch vollstandig; bei 200°C erfolgt jedoch ohne Zusatz eines (tertiaren) Amins eine besonders starke Verminderung der Molekulargewichte und ein Verlust an Polymerem durch Bildung flussiger Oligo-oxymethylendiacetate. Eine fast quantitative Acetylierung ohne Molekulargewichtsverminderung ist durch Umsetzung bei 135°C in Losung unter Zusatz eines tertiaren Amins moglich. Die Veresterungsgeschwindigkeit bei 135°C ist in heterogenem Medium wesentlich …
A capillary liquid chromatography method for benzalkonium chloride determination as a component or contaminant in mixtures of biocides
2015
A method for quantifying benzalkonium chloride (BAK), an alkyl dimethyl benzyl ammonium compound, in several biocides formulations is proposed. A tertiary amine like N-(3-aminopropyl)-N-dodecyl-1,3-propanediamine (TA) and a straight-chain alkyl ammonium compound like trimethyl-tetradecyl ammonium chloride (TMTDAC), have been employed as trade surfactants besides BAK. Two capillary analytical columns with different polarities are tested: inertsil CN-3 capillary column (150mm×0.5mm i.d., 3μm particle diameter) and a non endcapped Zorbax C18 capillary column (35mm×0.5mm i.d., 5μm particle diameter). This latter column provided the best separation of the BAK homologues in less than 12min using …
Synthesis and solution properties of star-shaped poly(tert-butyl acrylate)
2000
A series of star polymers consisting of poly(tert-butyl acrylate) arms and an ethyleneglycol dimethacrylate (EGDMA) microgel core were synthesized using anionic polymerization. The effect of various parameters (precursor length, ratio [[EGDMA]/[Initiator], reaction time, and overall concentrations) on the average number of arms was investigated. Molecular weights were determined using GPC coupled with an online viscometer and MALLS. The exponents for the relation between intrinsic viscosity or radius of gyration and molecular weight, respectively, are extremely low, indicating that the dimensions of the star polymers only slightly increase with the number of arms. After a certain number of …