Search results for "Zen"
showing 10 items of 3479 documents
Reframing health care through social media
2015
This teaching case presents the story of the Hospital Campus (HC) project and its effort to reframe health-care services for the elderly through the adoption of social media. In a world of global ageing, in which an increased number of elderly patients will be cared for by a shrinking number of workers, a primary challenge is how to use technology to provide better and more efficient services for the elderly. The HC campus project focuses on how to involve information technology-illiterate elderly patients and their social networks in the design and use of social media services to improve their quality of life. In describing the development of the project, we focus on the elderly patients’…
Chemical Correlations Between Industrial Curds and Final Cheeses. Can Cheesemakers Standardise Productions?
2016
The chemical composition of milks and curds influences the microbial ecology and chemical features of produced cheeses. This statement is quite obvious because ‘normal’ cheeses—products with a prevailing ingredient, milk—are obtained by means of the transformation of the main raw material and the addition of minor components. Because of the possible scarcity of readily available milk in many regions or economic areas, the industry of milk and dairy products, including cheeses, has improved the production of ready-to-use curds. These products, also named ‘industrial curds’, are produced exclusively for further cheesemaking processes. For this reason, ready-to-use curds are pre-packaged with …
La metodología ApS refuerza la adquisición de competencias generales y específicas
2019
[EN] Service-learning (SL), through a process of action-reflection-action collaborates in an efficient and practical way to the consolidation of basic and specific competencies that contribute to a successful life and good social functioning. The aim of the work is to analyse how the SL methodology improves general and specific competences in the students. To this end, two experimental groups were formed: a) SL group; b) NO-SL group (control). Each of the groups was evaluated in specific competences (exploration of cranial pairs) and general competences (communication, adaptation,..). The results were compared using the t-Student test. The results showed that the SL group significantly impr…
La utilización de la metodología ApS refuerza la adquisición de competencias a largo plazo
2019
[EN] Service-learning (SL) is a methodology that contributes to the formation of values and the citizenship of university students, who can acquire a relevant role in the construction of a more dignified, inclusive, cohesive and equitable citizenship. The objective of the work is to quantify how the SL methodology implemented in a subject improves the competences of the students in the same course of implementation and after one year of implementation. Four experimental groups were formed: a) group LS-course 2017-2018; b) group NO-LS-course 2017-2018; c) group LS-course 2018-2019; d) group NO-LScourse 2018-2019. Each one of the groups was evaluated during the academic year 2018-2019 in the …
Zum Mechanismus der Inden‐Bildung durch Friedel‐Crafts‐Cycloalkenylierung
1972
α,β-Ungesattigte Aldehyde reagieren mit Benzol unter Friedel-Crafts-Bedingungen zu Indenen. Mittels 14C- und 2H-indizierten Verbindungen werden die reversible, nucleophile Addition von Benzol an Zimtaldehyd sowie die 1.3-Wasserstoff-Verschiebung im Crotonaldehyd beim Ringschlus nachgewiesen. On the Mechanism of the Indene Formation by Friedel-Crafts Cycloalkenylation α,β-Unsaturated aldehydes were condensed with benzene in a Friedel-Crafts type reaction to give indenes. With the aid of 14C- and 2H-labelled compounds both the reversible nucleophilic addition of benzene to cinnamaldehyde and the 1.3-hydrogen shift in the cycloalkenylation of crotonaldehyde are examined.
SYNTHESIS OF SELENIUM-CONTAINING CROWN ETHERS AND RELATED COMPOUNDS
1991
Abstract The synthesis of the first examples of selenium-containing crown ethers from the benzene diselenolate anion and dichalcogenated ethers is reported. The reaction is highly dependent on the experimental conditions, particularly the concentration. 1H NMR and mass spectrometry were used to confirm the structures of the new compounds.
Adamantan als Baustein neuer Araliphane Synthese, Spektroskopie und Kristallstrukturen
1991
Adamantane as a Building Block of New Araliphanes – Synthesis, Spectroscopy, and Crystal Structures Exchange of benzene units for aliphatic building blocks in cyclophanes leads to new molecules of the “araliphane” type. With adamantane the araliphanes 2 – 4 are synthesized. Their stereochemical behavior as shown by NMR studies and X-ray crystallographic analyses differs significantly from that of their aromatic counterparts. The signals of the intraannular adamantane hydrogens are strongly shifted upfield up to δ=– 2.18 (in 2). 4 is obtained as a racemic mixture of enantiomers (in the crystalline state) and shows a boat-like deformation of the benzene moiety.
Repetitive‐Synthesis of Bulky Dendrimers – A Reversibly Photoactive Dendrimer with Six Azobenzene Side Chains
1993
Dendrimers with bulky repeating units containing up to 43 benzene rings (in 9) have been obtained by using a repetitive divergent synthetic strategy (three generations). The new functional dendrimer 13 containing six azobenzene units at the periphery was synthesized allowing a reversible switching of the shape and size of the molecule upon irradiation. An X-ray structure analysis of the dendritic molecule 3a shows the inclusion of acetonitrile.
Non-oxidative dehydroaromatization of methane:an effective reaction regeneration cyclic operation for catalyst life extension
2015
[EN] Non-oxidative methane aromatization is an attractive direct route for producing higher hydrocarbons. It is highly selective to benzene despite the low conversion due to thermodynamic limitations, and Mo/H-ZSM-5, the first catalyst proposed for this reaction, is still considered as one of the most adequate. The major problem of this process is the severe catalyst deactivation due to the rapid build-up of carbonaceous deposits on the catalysts. Here we present an effective regeneration procedure that extends the life of Mo/zeolite based catalysts by combining reaction periods of 1.5 h with 0.5 h regeneration steps in a continuous cyclic mode and methane activation after each regeneration…
Oxygen atom transfer reaction involving oxomolybdenum complexes with sterically bulky thiocarboxylate ligands and biochemical interesting substrates …
1999
Abstract Oxidation–reduction reactions of substrates in systems containing the complex [Mo VI O 2 (O 2 CC(S)CH 3 Ph) 2 ] 2− in methanol have been investigated as models of oxo-transfer reactions. At neutral pH, the [Mo VI O 2 (O 2 CC(S)CH 3 Ph) 2 ] 2− reacts with Me 2 PhP or n -butanethiol to yield a [Mo IV O(O 2 CC(S)CH 3 Ph) 2 ] 2− species and Me 2 PhPO or disulfide, respectively. The Mo IV O complex reduces a variety of substrates XO = Me 2 SO and pyridine N-oxide conducing formation of X = Me 2 S and pyridine. The occurrence of these reactions produces a catalytic system Me 2 PhP + XO → Me 2 PhPO + X and 2BuSH + XO → [BuS] 2 + X + H 2 O. In this work we have also included the study of …