Dictionary » B » Bleaches

Bleaches

Bleach

to make white, or whiter; to remove the colour, or stains, from; to blanch; to whiten. The destruction of the colouring matters attached to the bodies to be bleached is effected either by the action of the air and light, of chlorine, or of sulphurous acid. (Ure) Immortal liberty, whose look sublime Hath bleached the tyrants cheek in every varying clime. (Smollett)

Origin: oe. Blakien, blechen, v. T. & v. I, as. Blacian, blcan, to grow pale; akin to Icel. Bleikja, Sw. Bleka, dan. Blege, D. Bleeken, g. Bleichen, as. Blac pale. See bleak.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Confusion: Rod cells,rhodopsin bleaching

I'm confused as to why,when exposed to bright light, rod cells cease to function. I understand that exposure to bright light bleaches all of the rhodopsin, but...so what? Why doesn't the bleached product (opsonin/retinal) simply get re-synthesised back into rhodopsin as it does in dim ...

See entire post
by ADAS137
Sun Jan 01, 2012 10:26 pm
 
Forum: Human Biology
Topic: Confusion: Rod cells,rhodopsin bleaching
Replies: 0
Views: 764

Re: Developing resistance to detergent

... cannot evolve a resistance to. Anything that has a gross effect is immune to resistance. For example : bacteria cannot evolve resistance to bleaches or to caustic materials since these chemically disintegrate the cell membrane. Nothing subtle there to get around. Things like antibiotics ...

See entire post
by skeptic
Sun May 29, 2011 4:28 am
 
Forum: Microbiology
Topic: Developing resistance to detergent
Replies: 2
Views: 2164

The Fiber Disease

During visual excitation, rhodopsin undergoes photoactivation and bleaches to opsin and all-trans-retinal1, 2. To regenerate rhodopsin and maintain normal visual sensitivity, the all-trans isomer must be metabolized and reisomerized to produce the chromophore ...

See entire post
by London
Sat Dec 02, 2006 10:52 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5013092

Urine

Actually most bleaches use sodium hypochlorite as an active ingredient...with teh same results descibed. I've never heard of the type of bleach that you listed above ;) I was referring to acids and bases. Nit-picking the actual ...

See entire post
by biostudent84
Tue Jun 21, 2005 5:41 pm
 
Forum: Human Biology
Topic: Urine
Replies: 99
Views: 42355

Urine

Actually most bleaches use sodium hypochlorite as an active ingredient...with teh same results descibed.

See entire post
by mith
Mon Jun 20, 2005 3:49 pm
 
Forum: Human Biology
Topic: Urine
Replies: 99
Views: 42355


This page was last modified 21:16, 3 October 2005. This page has been accessed 858 times. 
What links here | Related changes | Permanent link