From owner-metabolic-reg@net.bio.net Thu Jan 30 22:00:00 1997 Path: biosci!daresbury!nntp-trd.UNINETT.no!nntp.uio.no!www.nntp.primenet.com!nntp.primenet.com!news.mathworks.com!rill.news.pipex.net!pipex!dispatch.news.demon.net!demon!fssc.demon.co.uk!fssc.demon.co.uk!HSauro From: Herbert M Sauro Newsgroups: bionet.metabolic-reg,sci.chem,sci.life-extension,sci.med,sci.med.pharmacy,sci.med.nutrition,rec.crafts.brewing,rec.crafts.winemaking Subject: Re: A-level help needed! - Chemistry & fermentation Date: Thu, 30 Jan 1997 20:44:00 +0000 Organization: Future Skill Software Distribution: world Message-ID: References: <854622079.25760@dejanews.com> NNTP-Posting-Host: fssc.demon.co.uk X-NNTP-Posting-Host: fssc.demon.co.uk MIME-Version: 1.0 X-Newsreader: Turnpike Version 1.12 Lines: 42 Xref: biosci bionet.metabolic-reg:976 sci.chem:74145 sci.life-extension:16563 sci.med:149336 sci.med.pharmacy:40560 sci.med.nutrition:58569 rec.crafts.brewing:107092 rec.crafts.winemaking:15388 In article <854622079.25760@dejanews.com>, parkstone@lds.co.uk writes >Hi, I'm an A-level student currently studying chemistry. I am presently >involved in an extended investigation, which makes up part of my final snip > >To measure the rate of reaction, substrate concentration of each >monosaccharide will be varied and a measurement of carbon dioxide, the >by-product of fermentation, will be obtained. > > >If you have any information that you feel could be of use, constructive >criticism of the proposal or titles and authors of any useful reference >materials, please e-mail me at richards_@msn.com > >Thankyou for all your help; I look forward to hearing from you. > >Felicity Richards >-------------------==== Posted via Deja News ====----------------------- > http://www.dejanews.com/ Search, Read, Post to Usenet Forget about rate-deterimining steps and flux control coefficients (they're not in your syllabus anyway?). Try this investiagtion, works a treat: Using the same experimental approach you've outlined, instead of varying the sugar type (which you can but interpret it instead in terms of different transport mechanism across the cell's membrane, it doesn't matter if its wrong, its a reasonable hypothesis which is what counts in your grading) vary the concentration of heavy metals, eg try copper, Lead (works well), and so on. You'll see a nice inhibition of fermentation and you can us as your hypothesis the possiblity that the metals are binding to one or more enzymes in the cells and thereby affecting their rates and hence fermentation. Herbert -- Herbert M Sauro email: HSauro@fssc.demon.co.uk Telephone: 01974 282428 ----------------------------------------------------------------------- "He who cannot draw on 3000 years is living from hand to mouth" Goethe "Ah, but a man's reach should exceed his grasp, or what's a heaven for?" R Browning. .