Search found 246 matches

by melsid
20 Nov 2023, 12:04
Forum: Biology, Physics...
Topic: testing for microbes
Replies: 4
Views: 6155

Re: testing for microbes

Have you looked up the Science ASSIST site? Below is a snippet from their AIS Microbiology Guidelines: "7.2 Environmental sampling When sampling from the environment, the microorganisms collected are not identified. It is therefore important to sample from environments that are not likely to co...
by melsid
15 Mar 2023, 09:34
Forum: Sourcing Materials & Eq Repairs
Topic: trundle wheel
Replies: 15
Views: 8289

Re: trundle wheel

We just bought some from MTA, they seem to be working well so far. Plastic, with the counter, and adjustable handle.
by melsid
15 Mar 2023, 09:25
Forum: Safety with Chemicals
Topic: printers
Replies: 9
Views: 6042

Re: printers

I used to have to walk across to the other side of the school to use a colour printer, and there was a black & white one here in my block. Now however, after years of begging, we have a colour printer here in the block!!! So exciting!!! Handy hint when sending anything - but especially labels - ...
by melsid
15 Mar 2023, 09:19
Forum: Safety with Chemicals
Topic: storage of H2O2
Replies: 12
Views: 12607

Re: storage of H2O2

We don't use a lot of it, so we buy the 500mL bottles of 30% and dilute as necessary for the weaker solutions.
The amount of waste we save doing it this way more than makes up for the higher $$$/litre.
by melsid
07 Dec 2022, 11:48
Forum: Biology, Physics...
Topic: sterilising and stench
Replies: 9
Views: 10699

Re: sterilising and stench

I have an electric pressure cooker here. At my old school I had an old one that I used to just put on the magnetic stirrer/hotplate for a while and hope for the best... Any recommendations for settings, times etc for an electric one? If you look up Science Assist they have an AIS on sterilising aga...
by melsid
30 Nov 2022, 09:44
Forum: Recipes and Pracs
Topic: Oxygen gas jars
Replies: 9
Views: 6886

Re: Oxygen gas jars

So it has been hectic around here lately, sorry I didn't get to this earlier. Attached (if it works) are a few photos of our gas harvesting setup. We use it for oxygen and hydrogen and it makes the task so much easier!
Note: the tub should be full of water, and I use a gas jar to catch the gas.
M
by melsid
01 Sep 2022, 11:33
Forum: Biology, Physics...
Topic: waste from dissections
Replies: 9
Views: 6471

Re: waste from dissections

Ours all go straight into the skip. Our skips are emptied at random, so there is no need to freeze them and wait until bin day.
by melsid
25 Aug 2022, 09:42
Forum: Safety with Chemicals
Topic: Magnesium powder for yr 12 Chemistry: Riskasses
Replies: 11
Views: 9010

Re: Magnesium powder for yr 12 Chemistry: Riskasses

Well done bigmack. When I started here I had a similar problem - lots of waste in the storeroom and nothing in the budget to pay for disposal. So I did my research and bit by bit disposed of what I could. By the time I was done, I could afford to pay a contractor to dispose of what was left. My bigg...
by melsid
19 Aug 2022, 12:49
Forum: Miscellaneous
Topic: alka seltzer tablets
Replies: 7
Views: 8333

Re: alka seltzer tablets

We have just started using the denture tablets, and for what we do the blue colour change doesn't matter at all. Otherwise we use aspro clear which you can get at a reasonably cheap price from Chemist Warehouse.
by melsid
19 Aug 2022, 12:45
Forum: Sourcing Materials & Eq Repairs
Topic: Brains, hearts, kidneys & plucks
Replies: 23
Views: 11957

Re: Brains, hearts, kidneys & plucks

Wow, I guess I haven't realised how lucky we are - one of the few advantages of being rural. We get our hearts, lungs, plucks, digestive tracts and eyeballs FREE!!! from the local abattoirs. We do have to buy brains, but I have discovered which of our local butchers get the frozen ones that are wrap...
by melsid
03 Aug 2022, 10:54
Forum: Sourcing Materials & Eq Repairs
Topic: End User Declaration
Replies: 47
Views: 36473

Re: End User Declaration

I work in a DEC school, and all of our accounts MUST be in the school name and use the school email address. I can still log in as usual, as I set the account up. Also, setting it up this way is much easier if I have an extended period of leave and someone else needs to order while I am away. As for...
by melsid
16 Jun 2022, 09:27
Forum: Miscellaneous
Topic: MLD Boards
Replies: 11
Views: 7358

Re: MLD Boards

When ours arrived, there are 3 labs which have a dais in front of the board, so the stand obviously wouldn't fit there. It took our TSO 2 full days to get a work order allowing them to be installed onto the wall instead of a stand! The rest will be wall mounted eventually, within the next 9 months o...
by melsid
16 Jun 2022, 09:21
Forum: Recipes and Pracs
Topic: Oxygen gas jars
Replies: 9
Views: 6886

Re: Oxygen gas jars

To harvest oxygen and hydrogen easily, we have a dedicated setup for each. Burette into the stopper of a side arm conical flask dispensing the H2O2 or the 5M HCl. In the flask is either the MnO2 or Mg ribbon. We then bubble the gas out through a water bath and a beehive and into the container we nee...
by melsid
06 Jun 2022, 14:17
Forum: Sourcing Materials & Eq Repairs
Topic: Microscope Service/Repairs
Replies: 6
Views: 7553

Re: Microscope Service/Repairs

Hi labbassistant, if you have several items needing repairs and parts you might want to give Bob Death a call - he does a great job and doesn't charge the earth for it.
by melsid
31 May 2022, 14:05
Forum: Sourcing Materials & Eq Repairs
Topic: Purchasing Mercury
Replies: 9
Views: 6331

Re: Purchasing Mercury

Have you tried SSA? They are very well priced for any of the chemicals I have looked up, and may be the same for mercury.
by melsid
13 May 2022, 10:34
Forum: Sourcing Materials & Eq Repairs
Topic: Geiger Counter
Replies: 1
Views: 4730

Re: Geiger Counter

You can get geiger counters to attach to your data loggers, depending on the brand this might be a cheaper option?
by melsid
29 Apr 2022, 09:08
Forum: Announcements
Topic: Banning certain plastics in schools
Replies: 9
Views: 6667

Re: Banning certain plastics in schools

hmmm, surely there should be an exemption for educational use?? :neutral:
by melsid
21 Mar 2022, 10:44
Forum: Biology, Physics...
Topic: Junket is Dangerous
Replies: 7
Views: 9645

Re: Junket is Dangerous

What about the dishwashing liquid labels from Chemwatch which show up as "Toxic to aquatic life" ?!?!? And "Harmful to aquatic life with long lasting effects"
by melsid
08 Mar 2022, 10:46
Forum: Sourcing Materials & Eq Repairs
Topic: Wanting to purchase
Replies: 15
Views: 10357

Re: Wanting to purchase

We have the 250mL round bottom flasks, we use them in our heating mantle. I recently bought one from Haines that was 14/23 but they also sell the 19/26.
IG232
Flask, Round Bottom 250ml (19/26)
$19.50 ex GST
by melsid
23 Feb 2022, 12:48
Forum: Sourcing Materials & Eq Repairs
Topic: Data Harvest Easy Sense Probe availability
Replies: 6
Views: 3268

Re: Data Harvest Easy Sense Probe availability

bigmack wrote: 23 Feb 2022, 09:05 But I eventually found if I typed "Smartq pH" , I got the results .....alas the pH probe I wanted is awaiting stock....isn't that the way everything s now days :-({|=
It's always the way sadly. :-({|=