Search found 18 matches

by TwinkleK
Thu Apr 04, 2013 9:47 am
Forum: Human Biology
Topic: FIGURES!
Replies: 6
Views: 5109

Re: FIGURES!

Okay I still don't get this?? :( Someone pls help....

Has these figures got anything to do with standard error of the mean??

THANKS
by TwinkleK
Wed Apr 03, 2013 10:12 pm
Forum: Human Biology
Topic: FIGURES!
Replies: 6
Views: 5109

FIGURES!

Hey guys, Just need some help with this please... 28.3 + 12.3 (the plus and minus symbol...weren't sure how to do this, so I've just underlined it!!!) What does this mean??? And most importantly how do I get this figure? NB: Maybe..has it got anything to do with graphs...? Thanks, all help appreciat...
by TwinkleK
Sun May 20, 2012 12:08 am
Forum: Bioinformatics
Topic: Calculating a confidence interval on a calculator??
Replies: 1
Views: 3264

Calculating a confidence interval on a calculator??

Calculating a confidence interval on a calculator?? Please help:(

I know how to do the equation etc...

Just don't know how to put the symbol, ± into the calculator....
by TwinkleK
Sat Feb 11, 2012 9:43 pm
Forum: Human Biology
Topic: Does NOT contain microtubles...
Replies: 1
Views: 4010

Does NOT contain microtubles...

a) Hair fibres (if this is it, then does that mean this is a spindle fibre, cilia??)

b) Flagella
by TwinkleK
Sat Feb 11, 2012 9:39 pm
Forum: Molecular Biology
Topic: Hydrochloric acid (HCL) in the stomach..
Replies: 9
Views: 7723

Re: Hydrochloric acid (HCL) in the stomach..

Well it's the amoount of hydrogen ions isn't it?
by TwinkleK
Sat Feb 11, 2012 3:14 pm
Forum: Molecular Biology
Topic: Hydrochloric acid (HCL) in the stomach..
Replies: 9
Views: 7723

Re: Hydrochloric acid (HCL) in the stomach..

a) how do I use the formula "pH = log10 [H+]"

I can't do this because I don't have the [H+] and I can't rearrange it to find to: "[H+] = log10 pH"


Becuase I don't have the pH, ony the information as given in the question....
by TwinkleK
Fri Feb 10, 2012 3:48 pm
Forum: Molecular Biology
Topic: Hydrochloric acid (HCL) in the stomach..
Replies: 9
Views: 7723

Re: Hydrochloric acid (HCL) in the stomach..

Thanks..

a) Is this like a standard equation? Where do I put my equations in??

b) Sorry, but I am not getting this at all..
by TwinkleK
Fri Feb 10, 2012 1:48 pm
Forum: Molecular Biology
Topic: Hydrochloric acid (HCL) in the stomach..
Replies: 9
Views: 7723

Erm, is the answer for question b?

The reaction catalyzed by carbonic anhydrase is:

CO2 + H2O -----(Carbonic anhydrase)-----> HC0-3 + H+
(in tissues - high CO2 concentration)

I'm not sure though..
by TwinkleK
Fri Feb 10, 2012 12:58 pm
Forum: Molecular Biology
Topic: Hydrochloric acid (HCL) in the stomach..
Replies: 9
Views: 7723

Hydrochloric acid (HCL) in the stomach..

Cells in the wall of the mamalian stomach secrete HCL at a concentration of 0.1M. The secreted -protons, which are derived from the intracellular hydration of CO2 by carbonic anhydrase, are pumped out by an (H+ k+) ATPase antiport transporter is also required to complete the overall transport syste...
by TwinkleK
Fri Feb 03, 2012 7:45 pm
Forum: Molecular Biology
Topic: Beer Lambert’s Law help..:(
Replies: 8
Views: 10487

Re: Beer Lambert’s Law help..:(

Absorbance: let's say 0.2744 nm
Extinction: 6220 l/mol/cm
Path lenght (L): 1 cm

0.2744 / 62240 = 4.11
(the 1 get's cancelled out)

now what? what's the next step? using international units of enzymes..
by TwinkleK
Fri Feb 03, 2012 7:01 pm
Forum: Molecular Biology
Topic: Beer Lambert’s Law help..:(
Replies: 8
Views: 10487

Re: Beer Lambert’s Law help..:(

Yep, that's it:)

Finding the concentation..the equation has to be arranged. Which I have:)

I'm just not sure of the calculation steps.. (to find C)
by TwinkleK
Fri Feb 03, 2012 6:46 pm
Forum: Molecular Biology
Topic: Beer Lambert’s Law help..:(
Replies: 8
Views: 10487

Re: Beer Lambert’s Law help..:(

The path lenght is 1 cm

The molar extinction co efficient is 6220 l/mol/cm at 340 nm

Stuck :( :(