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The reaction of hyperforin with hydride reducing agents.

As part of a study aimed at generating analogues of hyperforin (1), the reaction of this prenylated phloroglucinol with various hydride reducing agents was investigated. Hyperforin contains two beta-dicarbonyl systems, one of which is non-enolizable, and it was interesting to assess the relative reactivity of these structural elements in the highly compact framework of the natural product. Dependi

Mass media: Introduction and schools of thought

This short encyclopedia article looks at the nomenclature and organizing logics of the field of mass media research. Four 'schools' of research are highlighted: the mainstream social science legacy, the various critical traditions, the culturalist perspective, and policy horizons.

Polarization portraits of lightharvesting antennas: from single molecule spectroscopy to imaging

Popular Abstract in English Plants, algae and some bacteria are able to harvest solar energy to run chemical reactions by a complex process known as photosynthesis. Crucial molecules in this process are the so-called light-harvesting antennas. These antennas contain large amounts of pigments, such as chlorophyll, that are used for solar light absorption. Moreover, these pigments are also involved Multichromophoric systems are very important in photosynthesis and any device that uses solar energy for its operation. This is because multichromophoric light-harvesting antennas are responsible for the absorption of light and the efficient transfer of the absorbed energy toward distinct places where it is to be used or stored. Over the last 10 years polarization sensitive single molecule methods

Utformning av fuktskydd vid golv på mark. Nuvarande kunskaper och exempel på lösningar

Rapporten är ett försök att sammanfatta nuvarande kunskaper samt presentera vad som för närvarande kan rekommenderas vid val av konstruktionsutformning vid "platta på mark", med utgångspunkt från vad vi vet idag och hänsyn tagen till de bristande kunskaper vi har inom vissa områden. Förslag ges till enkla regler vid dimensionering mot olika fuktkällor och exempel belyser användningen och behovet a