Re: Adhesion

> I wouldn't assume that. Based on what's written about 3-AEPS in
> histological literature, my guess is that that particular silane
> doesn't help adhesion of gelatin at an ordinary coating pH. (That
> silane is sometimes used to mount/adhere specimen on microscope
> slides. People around me use chrome gelatin instead, partly because
> the specimen is often buffered at pH of 7.4.)

Nevertheless, I do know that particular silane has been (and is
still being) used in that way.

Martin

----- Original Message -----
From: "Ryuji Suzuki" <rs@silvergrain.org>
To: <alt-photo-process-l@sask.usask.ca>; <martinm@SoftHome.net>
Sent: Tuesday, February 22, 2005 4:52 PM
Subject: Re: Adhesion

> From: MARTINM <martinm@SoftHome.net>
> Subject: Re: Adhesion
> Date: Tue, 22 Feb 2005 12:37:51 +0100
>
> > > Do you have a reference for this? (Or your own data?)
> > > The ionized state of the amino group of 3-apes
> > > (3-aminopropyltriethoxysilane) is critically involved in the adhesion.
> > > So are the ionization profile of amino and carboxyl groups in
> > > gelatin. These are all pH dependent.
> >
> > ... but probably not relevant at the pH range prior to coating.
>
> I wouldn't assume that. Based on what's written about 3-AEPS in
> histological literature, my guess is that that particular silane
> doesn't help adhesion of gelatin at an ordinary coating pH. (That
> silane is sometimes used to mount/adhere specimen on microscope
> slides. People around me use chrome gelatin instead, partly because
> the specimen is often buffered at pH of 7.4.)
>
> --
> Ryuji Suzuki
> "Well, believing is all right, just don't let the wrong people know
> what it's all about." (Bob Dylan, Need a Woman, 1982)
Received on Wed Feb 23 10:58:35 2005