#1 Science Forum For Lab Technicians

Hi Potassium Ferrate K2FeO4 dark purple to black colour, (CAS number 39469-86-8)is oxidizing agent, It is very hard to find information about it but there is something in wikipedia. Tell me what do you need it for and maybe I will be able to suggest something else http://en.wikipedia.org/wiki/Potass...

milk powder

hi,

microbiology
composition agar, 15 g/L
milk solids (equivalent to 10 ml fresh milk), 1 g/L
peptone, 5 g/L
yeast extract, 3 g/L
final pH 7.2±0.2 (25 °C)

I do not know, last year only Data Harvest was used. Maybe they changed something this year, better contact them and see.

Hi everyone,
To have any use from this course you should have newer model (last year) of data logger (data harvest) only, I was there last year, but not much use as I have old model

Silly me, I forgot The most important thing ,solubility of Salicylic acid (1gr in 460ml of water) but to improve solubility dissolve desired amount of acid in absolute alcohol then add water.
As for Abscisic acid solubility is methanol: 50 mg/mL, may be clear to slightly hazy

The easiest way to calculate mass of substrate to make solution of any molarity use formula m = M x Mr x V where: m is mass in grams M is concentration of the solution Mr is molecular weight V is volume in Litres of solution Example : Mr of Salicylic acid is 138.12 Desired molarity is 0.1M And you n...

Hi,
Use table this website it has density for heaps different chemicals chose one
http://us.mt.com/mt/filters/application ... 05d031.jsp

hi,
this is great website
http://www.seafriends.org.nz/enviro/habitat/shore.htm

Hi Mother, Propanoic acid can be used with any alcohol (ethanol, methanol, propanol, butanol) and with conc. sulphuric acid will form esters. (Sulphuric Acid catalyst) methanol + propanoic acid methyl propanoate + water. ( nail polish remover) ethanol + propanoic acid ethyl propanoate + water H2O (r...

hi
you can pay for CD's only it will cost $80 per year and you will get 4 CD or for other deals call (03) 95724700

hi dolphinscales, maybe this can help silver nitrate EQIPMENT NEEDED: • Beaker • Stirring rod • Balance • Test tube clamp • Copper wire (clean it up with sand paper) • Silver nitrate ( used silver nitrate is OK) • Distilled water Obtain one approximately 30-...

Hi pkij,
check these websites


http://www.ic.sunysb.edu/Class/che133/t ... tfilt.html

http://orgchem.colorado.edu/hndbksuppor ... ation.html

hi,
we use conc sulfuric acid (73mL H2SO4 and 27mL water) to break cellulose down to starch and then use iodine/potassium iodide test for starch

hi,
i bought this book 6 years ago from Southern Biological tel; 03/98774592
ISBN 0 646 38578 X

hi,
There is a way how to do it. If you can call me on 02 96261999 between 9-2
Monday to Thursday
I’ll talk you through, but make sure that you are in front of you computer

hi,
talk to you TAS department to make you wooden stand like this This is plastic but kid made ours as a prac
sorry i can not post the picture but if you go to this website you will find one

http://www.wardsci.com/product.asp?pn=IG0002976

Hi again, i copy this from internet, i use this website a lot http://www.sciencestuff.com/nav/instructions/agar1.htm Agar is a gelling agent extracted from red seaweed. Nutrient agar is a commonly used food medium for microbial cultures. Nutrient agar contains: beef extract (provides carbohydrates, ...

hi all Treat all cultured organisms as potentially pathogenic and therefore a potential source of infection. Avoid contact between the hands and the mouth and other skin surfaces, e.g. touching the plate with fingers or pencils or pens, or touching an un sterilized loop. Hands must be washed before ...

hi Tania I use "Laboratory book" for recepies and this one I use for cellulose and starch tests IODINE SOLUTION A blue/black colour indicates the presence of starch or cellulose 3g iodine 15 g potassium iodade 1L distilled water Disolve potassium iodide in app 800mL of the distilled water ...