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Phenols

phenolsulfonphthalein

(Science: chemical) 4,4'-(3h-2,1-benzoxathiol-3-ylidene)bisphenol s,s-dioxide. Red dye, ph indicator, and diagnostic aid for determination of renal function. It is used also for studies of the sexual gastrointestinal and other systems.

Pharmacological action: indicators and reagents, phthalein dyes.

chemical name: phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide


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dna purity is 17? what does it mean?

... you have very low concentration and thus very low absorbance. BTW with the 260/280 ratio higher than 2, the DNA is contaminated with some RNA, phenols or something like that. But I doubt anyone ever saw 17 :lol:

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by JackBean
Fri Jan 27, 2012 8:21 am
 
Forum: Molecular Biology
Topic: dna purity is 17? what does it mean?
Replies: 6
Views: 2688

storing banana in refrigerator

The cold temperature of your fridge encourages an enzyme (polyphenyl oxidase) naturally found in the banana to polymerise phenols in the banana skin into polyphenols . Polyphenols are similar to melanin, the pigment responsible for the colour in our skin. This is what blackens the skin ...

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by ivygirl_5
Wed Jun 06, 2007 8:28 pm
 
Forum: Botany Discussion
Topic: storing banana in refrigerator
Replies: 7
Views: 22070

The Fiber Disease

... Work is in progress to identify the limits of detection for a range of other microorganisms, including, fungi and cyanobacteria, and chlorinated phenols using electronic nose technology." "Pseudomonas aeruginosa Chemotaxis Associated with Blooms of N(2)-Fixing Blue-Green Algae (Cyanobacteria). ...

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by Nadas Moksha
Sun Aug 20, 2006 12:39 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5565744

Questions about catalase

... harmful oxidizing agent, to water and molecular oxygen. 2H2O2 to 2H2O + O2 Catalase also uses hydrogen peroxide to oxidize toxins including phenols, formic acid, formaldehyde and alcohols. H2O2 + RH2 to 2H2O + R Catalase – An Extraordinary Enzyme: http://216.239.33.100/search?q=cache:79RJ0s187pUC:www.catalase.com/cataext.htm+catalase+enzyme&hl=en&ie=UTF-8 ...

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by Dr.Stein
Sat Dec 17, 2005 2:56 pm
 
Forum: Cell Biology
Topic: Questions about catalase
Replies: 5
Views: 77070


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