> Dakota, you seem to know a lot about this, have you done any work in that field?
Short answer, no. There are a lot of people on here with way more
experience doing hands on molecular biology than me. I discovered
iGEM a year or two to late to try to establish a group at my school,
and coming from a small state school with non-existent research
departments and faculty who do no research, gaining hands on
experience in advanced molecular bio wasn't as easy, and so became an
after school thing. Lack of funds and equipment, although sometimes
depressing, should never deter someone from pursuing what they want to
study, or achieving a dream or goal. Whenever I feel like research is
impossible because I lack this or lack that, I try to think of all the
great scientists in the past who have done amazing things with so very
little, and it all seems possible again.
I don't know what situation you are in in terms of access to lab
equipment, but generating ideas is always free! Spending time in the
parts registry was fun because you'd start to see a coding protein
part from one project, then a really cool promoter from another
project, and think...hmm combining these would make a great new
biobrick!
Brainstorming new biological parts is really neat once you have a
basic understanding of what is needed in a plasmid, because the
plasmid becomes your blue print, and you start to view the E. Coli as
a billion little factories that build their own machinery, repair
broken machines themselves, and the only thing you need to pay them
to make your blueprint is some sugar and basic nutrients! (Forgot to
mention, they also build brand new factories by copying themselves
every 30 minutes!)
But ideas are easy to come by, execution of those ideas into a viable
tangible thing is what takes time, effort, and money. Take advantage
of being at University, look into maybe starting an iGEM team if you
can find a passionate professor who will oversee the group.
I've since moved away from bio-brick stuff simply because it's a pain
in the ass to get access to anything, and too expensive to synthesize
yourself. Maybe if I return to school I'd pick it up again, but for
now I'm focusing on easier molecular bio stuff and natural product
isolation.
Being in Ghana, you have a lot of access to a ton of interesting plant
life with amazing secondary metabolites! If you're interested in
chemistry I could help you in that department.
If I had a month to do something and I was in Ghana, it'd be this;
1. Identify plants that live in hostile or unusual circumstances, or
plants that have a history of use by the local culture as sources of
medicinal qualities (study known as ethnobotany)
2. Gather leafy tissue (or roots / bark in some cases) and grind the
tissue in a mortar and pestle.
3. Get a seperatory funnel and extract the tissues using a solvent
such as ethyl acetate, methanol, or dichlormethane.
4. Collect your fractions, one fraction is non-polar (ethyl acetate /
DCM) and the other fraction is polar (methanol / water)
5. Now whatever natural products and secondary metabolites of
potential medicinal quality are useful in your plant, are now either
in a polar or non-polar solvent depending on their molecular
structure.
6. Use a rotary evaporator to remove excess solvent so you are left
with a crude plant extract. If you do not have a rotary evaporator,
heating gently on a hot plate under a fume hood will remove solvent,
but much more slowly than a roto-vap. Be careful not to use to much
heat as you may decompose some of your products at to high a temp.
7. Re-suspend your crude plant extract in the least amount of solvent
possible (to keep it concentrated) 1-3mL
8. Put some of the plant extract on filter paper discs, and perform a
disc diffusion assay against a few different organisms.
http://en.wikipedia.org/wiki/Kirby-Bauer_antibiotic_testing
Gram negative - E.Coli
Gram positive - B. subtillus
Fungi - Aspergilus / Candida / Sarchomyces
Timeline:
Selection of plants based on literature of past use, or local culture
use = 1-5 days
Collection of specimens in the wild = 1-5 days
Grinding of tissue and solvent extraction per plant = 1-3 hours per
plant sample, so multiple per day. Add 1-2 hours if you don't have a
rotary evaporator. If you are using dichloromethane it could
evaporate out over night at a warmish temperature in a flow hood. The
higher the boiling point of your solvent (ethyl acetate or water) the
longer it will take to remove it. Methanol / dichlormethane can be
removed in short time. You can't "boil" out the water because then
there is a high chance you are completely destroying whatever
anti-fungal or anti-bacterial properties the compound has. (think
penicllin)
Plating of bacterial samples = 1 hour
Growth of bacterial samples + disc diffusion test = 1-2 days
(overnight) for bacteria, week+ for fungal
Theoretically, you'll hopefully have some rings of inhibition of your
filter paper discs, showing you that compounds in your plant extract
are killing or haulting the growth of certain types of bacteria or
fungi.
That's the easy part!!! Now separate the crude extract with HPLC,
fractionate it, prep on a normal phase column, do LCMS, GCMS, and NMR
of the fractions, and discover a brand new drug!
But seriously, Africa is full of amazing plants with great potential,
and you have a good opportunity to get real science data, and the best
part about it is that you don't need crazy expensive equipment to do
these extractions + disc diffusion assays. Think of it, shamans and
healers over the millenia have made extractions of natural plants,
only they don't do a disc diffusion assay to kill the bacteria, they
just put it on the open wound or cut!
A quick google search shows 3 people at your school, KNU (sorry...to
hard to keep looking up the spelling haha) wrote a book on medicinal
plants. I generally have access to ACS stuff, but not book chapters I
guess.
T. C. Fleischer, , M. L. K. Mensah and , R. A. Dickson
http://pubs.acs.org/doi/abs/10.1021/bk-2009-1021.ch014
Maybe go talk to this dude? He's at your school and maybe he can help you
http://www.knust.edu.gh/pages/sections.php?siteid=pharmacy&mid=600&sid=2867&id=658
If you have any questions I'll answer them to the best of my abilities.