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Krt - log KBE(Ko) - log KBE(0)

English translation: microbial cell reduction (t) = log CFU(control) - log CFU(D)

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German term or phrase:	Krt - log KBE(Ko) - log KBE(0)
English translation:	microbial cell reduction (t) = log CFU(control) - log CFU(D)
Entered by:	Stephen R Schoening

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21:04 Aug 9, 2011

German to English translations [PRO]
Science - Chemistry; Chem Sci/Eng / Suspension assay

German term or phrase: Krt - log KBE(Ko) - log KBE(0)

The above equation is in a suspension assay similar to one in page 8 of the link I will give below. I know that "KBE" means "CFU", or "colony-forming units".

(The "t" is smaller and lower down than the "Kr", but I could not reproduce that here. Same goes for the 0s, as far as I can determine.

Link: http://www.falw.vu/dida/protocol/Incides_N_Mi_e_Schub_15F629...

Can anyone help me on how to translate this equation into English or give me a reference that would help me? I haven't been able to find a reference that would explain this, either in English or in German.

Thanks,

Stephen

Stephen R Schoening KudoZ activity Questions: 357 (11 open) (9 without valid answers) (5 closed without grading) Answers: 4 United States
Local time: 14:52

microbial cell reduction (t) = log CFU(control) - log CFU(D)

Explanation:
microbicidal effectiveness:

Keimreduktion = microbial/bacterial cell redcution
t = Zeit = time (subscript)
KBE (koloniebildende Einheiten) = colony forming units
Ko = Kontrolle = control (subscript)
D = D-Wert = dezimale Keimzahlreduktion = D-value = decimal reduction time (subscript) - the time required at a certain temperature to kill 90% of the organisms being studied

e.g.
Bactericide activity was expressed as reduction factors, that is, logarithmic reductions in viable organisms:
Reduction factor = log10 CFU/mL (control) - log 10 CFU/mL (treated)
http://www.scielo.br/scielo.php?pid=S1517-83822007000400012&...

See also:
http://www.wfi.ch/sites/dl/wundliteratur/betaisodona/30285.p...
(German)
http://de.wikipedia.org/wiki/F-Wert
(German)

http://en.wikipedia.org/wiki/D-value
(English)

Selected response from:

Marga Shaw
Local time: 20:52

Grading comment

Thanks, Marga. Your answer was comprehensive!

Stephen
4 KudoZ points were awarded for this answer

Summary of answers provided

microbial cell reduction (t) = log CFU(control) - log CFU(D)

Marga Shaw

microbicidal efficacy

Ingo Dierkschnieder

Summary of reference entries provided

KR=Keimzahlreduktion

Johanna Timm, PhD

Discussion entries: 3

Answers

13 hrs confidence:

Krt microbicidal efficacy

Explanation:
Here once more the corrected answer: According to the following reference, Krt means "mikrobiozide Wirksamkeit", i.e. microbicidal efficacy.

Reference: http://www.wfi.ch/sites/dl/wundliteratur/betaisodona/30285.p...

Ingo Dierkschnieder
Local time: 20:52
Specializes in field
Native speaker of:

German
PRO pts in category: 172

17 hrs confidence:

microbial cell reduction (t) = log CFU(control) - log CFU(D)

Marga Shaw
Local time: 20:52
Specializes in field
Native speaker of:

German
PRO pts in category: 95

Grading comment

Thanks, Marga. Your answer was comprehensive!

Stephen

Reference comments

3 hrs

Reference: KR=Keimzahlreduktion

Reference information:
"In der nachfolgenden Tabelle 3 ist für die einzelnen Zusammensetzungen jeweils die Keimzahlreduktion KR t für eine bestimmte Einwirkzeit (hier 15, 30, 45 und 60 sec) im Vergleich zu Wasser standardisierter Härte (WSH) wiedergegeben. Die Keimzahlreduktion berechnet sich nach der Formel: KR t = log KBE(WSH) - log KBE(D) in der
KBE(WSH)
die Anzahl der koloniebildenden Einheiten nach Einwirkung von Wasser standardisierter Härte und
KBE(D)
die Anzahl der koloniebildenden Einheiten nach Einwirkung des Desinfektionsmittels (D) "

http://www.freepatentsonline.com/EP0252278.html

Johanna Timm, PhD
Canada
Native speaker of:

German
PRO pts in category: 24

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Krt - log KBE(Ko) - log KBE(0)

English translation: microbial cell reduction (t) = log CFU(control) - log CFU(D)

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Krt - log KBE(Ko) - log KBE(0)

English translation: microbial cell reduction (t) = log CFU(control) - log CFU(D)

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KudoZ™ translation helpThe KudoZ network provides a framework for translators and others to assist each other with translations or explanations of terms and short phrases.

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