Search found 33 matches

by benny
Mon Oct 22, 2007 11:49 pm
Forum: Microbiology
Topic: winogradsky experiments
Replies: 0
Views: 1707

winogradsky experiments

Hi all. I'm doing a report on Sergei Winogradsky, and need to include some historical background, including the instrumentation he used and experimental methods. Does anyone know of a url which gives details of biological scientific methods in the 1890s, in particular Russia? I've done some reading ...
by benny
Sun Oct 21, 2007 3:44 am
Forum: Microbiology
Topic: plant bacteria:Agrobacterium
Replies: 1
Views: 1754

no.. only plants, via lateral gene transfer. it can transfer genes to E. coli, but this does not induce virulence as the tra plasmid contained on the Ti plasmid has a broad host range, but the oriV gene does not. this prevents the bacterial genes from replicating (with the possibility of mutation la...
by benny
Sat Oct 20, 2007 6:04 am
Forum: Microbiology
Topic: prokaryotic apoptosis
Replies: 3
Views: 4386

so much for attachments.
Wood et al, 2002, The genome sequence of
Schizosaccharomyces pombe, Nature, vol 415, 21 february :oops:
by benny
Sat Oct 20, 2007 6:00 am
Forum: Microbiology
Topic: prokaryotic apoptosis
Replies: 3
Views: 4386

yes? certain yeasts undergo programmed cell death, and they are unicellular. bacterial altruism and suicide make it sound like a conscious decision made by the bacteria. it can be something analogous to quorum sensing, where certain signals and responses are put in place by something as simple as ce...
by benny
Mon Oct 08, 2007 2:12 am
Forum: Microbiology
Topic: prokaryotic apoptosis
Replies: 3
Views: 4386

prokaryotic apoptosis

I guess it happens, but does anyone have any solid info on this? I would like to do it as an honours project next year. apoptosis must have existed since the inception of multicellular life, as biofilms would need the same level of control over cells that are out of control or not needed. What about...
by benny
Sat Sep 08, 2007 2:07 am
Forum: Bioinformatics
Topic: what is the phase problem? x ray crystallography
Replies: 4
Views: 26446

xray crystallography

thanks very much for that. it clears things up a great deal.
by benny
Sat Aug 25, 2007 4:14 am
Forum: Bioinformatics
Topic: what is the phase problem? x ray crystallography
Replies: 4
Views: 26446

what is the phase problem? x ray crystallography

hey people.. can anyone give a succint definition of the phase problem in x ray crystallography? we've started looking at it in our course, but it hasn't really been defined. i've looked high and low on the web as well, but i have been unable to find any decent definition. also,, why is it a problem...
by benny
Sun Nov 06, 2005 12:18 pm
Forum: Cell Biology
Topic: First Cell
Replies: 9
Views: 5188

http://www.geocities.com/acgyles/origin.html

this guy seems to have similar theories about the prebiotic world. he seems to have put up a fair bit of stuff on the net.
by benny
Sun Nov 06, 2005 12:15 pm
Forum: Cell Biology
Topic: First Cell
Replies: 9
Views: 5188

creationism. oh dear.
by benny
Wed Oct 26, 2005 3:14 pm
Forum: Microbiology
Topic: biological content of clouds
Replies: 9
Views: 6955

the oxygen in the earth's atmosphere came from photosynthesising life. it wasn't present at the planet's formation, except maybe in trace amounts.
by benny
Wed Oct 26, 2005 3:07 pm
Forum: Cell Biology
Topic: does alcohol destroy dna?
Replies: 4
Views: 8102

thanks for that.
by benny
Sun Oct 23, 2005 12:12 pm
Forum: Microbiology
Topic: magnetosomes
Replies: 12
Views: 9039

maybe i made a booboo. :roll: the article title etc was dead on though. and it did have half a million authors. or at least a lot. :shock: