Australia's Science Forum

I have the same problem. It doesn't seem to cater for science at all.

Carol

This is some information I've collected on enzymes. 1) Papain , from the latex of the papaya plant, is one of a family of plant enzymes that includes bromelin (from pineapple) and ficin (from fig), all of which break down proteins. This is why the directions on a box of Jello remind you never to use...

Oh Margaret, she is gorgeous!
Congratulations.

Carol

I wear glasses for reading and found that wearing the 'fit over' safety glasses was not very successful, so I bought bifocal safety glasses. They have plastic shields on the arms to protect the sides of the eyes. I wear them all day. They cost about $150.00 from an optometrist and I claimed them bac...

Pepsin powder

I add the pepsin directly to the buffers.
Carol

I've had success with this: pH2 0.01M hydrochloric acid pH3 80mL 0.1M citric acid plus 20mL 0.2M disodium hydrogen phosphate pH4 62mL 0.1M citric acid plus 38mL 0.2M disodium hydrogen phosphate pH5 48mL 0.1M citric acid plus 52mL 0.2M disodium hydrogen phosphate pH6 37mL 0.1M citric acid plus 63mL 0...

Well, Liz, I was inspired by yours to go looking.
Carol

I found this on the internet - I think it's from the University of Queensland (uq.edu.au) 14.1.8 Test heat of reaction, with potassium permanganate with ethanol BE CAREFUL! This is a dangerous experiment Use very small quantities and follow your safety rules. Remember that strong oxidants should be ...

I've got this recipe:

0.3g KMnO4 in 200mL 1M H2SO4 (or 1.6g to 1L)

Hope it helps

Carol

Plastic storage bottle, rectangular, 1L Serrata 1099037 $3.00

I bought these earlier this year.

Carol

I've just received mine and immediately filled it out and handed it to the deputy. I'm going both days this year - whether the school's paying for it or not.
Where are you staying, Liz? I've just booked into the Park View Motel as on the flyer.

Carol

Chemwatch has lots of MSDS for coffee. I'm attaching one for instant coffee.

Carol

Thanks for that. I'm going to suggest it to the bio teachers.
Carol

So how do you actually measure the rate of photosynthesis? I don't think we do it here - at least I've never been asked to set it up.

I have one set of full MSDS in the staffroom - that's 5 lever arch folders- and a set of mini's in each lab and the chemstore.
I'm sure I've read that mini's on their own are not sufficient, but you only need one full set in the school.

Yes, the MW of Ba(OH)₂ is 171.3, but that still gives 1M an orange dot. Solutions of barium hydroxide are orange at concentrations greater than 1% (0.05M), according to Appendix D.

The MW of copper sulfate pentahydrate (CuSO₄.5H₂0) is 249.68, so you need 124.84g of CuSO₄.5H₂0 to make a 0.5M solution of copper sulfate.

If you were using CuSO₄ anhydrous you would need 79.81g to make up 0.5M solution.

Does that help?

Carol

Hi Ellice

I can help. I have new Human Ovary, Mature VS and Human Ovary, Showing Follicles VS.
I also have slides of testis, but they're not new. You're welcome to come over and see if they're suitable.
Carol (42296844)

Hi Cindy

All I can find is

"This is a mixture of concentrated hydrochloric acid and anhydrous zinc chloride (which acts as a catalyst)"

I can't find any proportions - maybe they're not important?

Carol