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Quantenausbeute
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Quantum yield
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In photosynthesis, the number of photons
required per molecule of carbon dioxide converted to sugar (or per oxygen
molecule produced)
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Quecksilberdampfbrenner
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Mercury arc lamp
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Source of ultraviolet light for fluorescence
microscopy
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Quervernetzung
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Crosslinking
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Racemisierung
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Racemization
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Rahmenfilterpresse
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f
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Frame filter press
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Plate and frame press
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Rasen
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Lawn
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An even growth of a specific bacterial
culture across a Petri plate
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rauh
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adj
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Rough
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R forms (see ‘S forms’)
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Reagenzglas
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n
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Culture tube
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A culture tube typically lacks the rolled
edge of a test tube
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Reagenzglas
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n
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Test tube
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Rechen
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pl
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Rakes
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Placed on stirrer shaft to break foam;
also used at inlets to sewage treatment plants to remove floating objects.
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Redox-Messgerät
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Redox meter
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Often called ‘potentiometer’, though this
term is more general.
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Redoxpotential
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Redox potential;
O/R;
Eh
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A value indicating the tendency of a
compound (or medium) to release electrons (become oxidized) or accept
electrons (become reduced). Note that these two meanings are opposites!
Different writers may accept one or the other meaning! There are also
different units!
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Regulation
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Regulation
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Regulationsgene
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Regulatory genes
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reif
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adj
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Mature
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E. g., mature spores
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Reifung
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Maturation
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Reinkultur
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f,, -en
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Pure culture
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Microbial culture containing only a
single species
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Rekombinant
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Recombinant
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Rennet
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Rennet
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Extract from ruminant stomach
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Rennin
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Rennin
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Milk-clotting enzyme from rennin
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Repression
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Repression
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reprimieren
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v
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Repress
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Resazurin
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Resazurin
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Dye (indicator) which is blue in the
presence of oxygen, red (or white) when reduced (e. g., by bacterial
metbolism)
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Resistenzgene
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Resistance genes
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Restzucker
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Residual sugar
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Retentat
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Retentate
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Material which does not pass through a
separating membrane
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Reynold’sche Zahl
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Reynold’s number
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A measure of turbulence in flow;
dimensionless
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Rieselfilm
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Trickling film
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Rieselfilmreaktor
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Trickling film reactor
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Rippenrohr
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Finned tube
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Fins improve heat exchange
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RNS
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RNA
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Ribonucleic acid
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Rückfallfieber
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Relapsing fever
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Pathogen:Borrelia recurrentsis
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ruhend
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adj
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Resting
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Not growing
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Ruhr
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Dysentery
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Rührerspitzengeschwindigkeit
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Stirrer tip speed
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A significant factor in scale-up
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Rührflügel
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m
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Mixer blade
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Impeller blade
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Rührwerkskessel
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Stirred reactor
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(Stirred fermentor)
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Copyright © 2010 Denzel Dyer, all rights reserved.
