Search found 1176 matches
- 27 May 2024, 12:10
- Forum: Sourcing Materials & Eq Repairs
- Topic: Glass tubing
- Replies: 10
- Views: 62
Re: Glass tubing
Yeah, Haines, Science Supply Australia can help. There are also capillary tubing sets that come with capillary tubing with different internal diameters - all cut and ready to go with bungs. I had a teacher show me once how to make very thin capillary tubing from glass pipettes. I ended up with more ...
- 24 May 2024, 09:48
- Forum: Biology, Physics...
- Topic: Agar plates - how old is too old?
- Replies: 6
- Views: 166
Re: Agar plates - how old is too old?
I've chucked a couple of them into the incubator. Waiting to see the "magic"!
- 23 May 2024, 14:56
- Forum: Biology, Physics...
- Topic: Agar plates - how old is too old?
- Replies: 6
- Views: 166
Re: Agar plates - how old is too old?
Thanks guys! Good to have back up to my thoughts. It's Year 10, not like they're working on a PhD.
I'm waiting to see the nose of the teacher get turned up!
I'm waiting to see the nose of the teacher get turned up!
- 23 May 2024, 14:24
- Forum: Biology, Physics...
- Topic: Agar plates - how old is too old?
- Replies: 6
- Views: 166
Agar plates - how old is too old?
Just reaching out to see what your thoughts are on how old is too old for an agar plate? Long story (maybe it should be in the "just a whinge" section). Ext Science student asked for a heap of plates. Year 12 Bio teachers also asked for heaps. Ext Sc student used 10 then dropped the subjec...
- 21 May 2024, 11:03
- Forum: Biology, Physics...
- Topic: standardisation of NaOH
- Replies: 13
- Views: 4333
Re: standardisation of NaOH
LOL! I get worried about giving some teachers conc HCl.
- 20 May 2024, 14:22
- Forum: Biology, Physics...
- Topic: standardisation of NaOH
- Replies: 13
- Views: 4333
Re: standardisation of NaOH
Not a great lot of help, Rosalie but our guys do a standardisation of NaOH and they get 0.1M NaOH and 0.1M HCl.
I agree - wouldn't give them conc acid
I agree - wouldn't give them conc acid
- 20 May 2024, 14:20
- Forum: Sourcing Materials & Eq Repairs
- Topic: Hoffman voltameter
- Replies: 8
- Views: 334
Re: Hoffman voltameter
Have you checked the bungs? As the rubber ages it shrinks and doesn't form a good seal. I could be wrong, but I think you can buy replacement electrodes for the IEC made voltameter. I usually find anything from IEC to be quite durable and often repairable.
- 17 May 2024, 14:25
- Forum: Recipes and Pracs
- Topic: Neutralisation of HCl
- Replies: 6
- Views: 333
Re: Neutralisation of HCl
What Ol' Mate can buy off the shelf is frightening! Bunnings have cleaned up their act a bit in recent years although they used to sell insecticides that any Jo Blow could buy, but we wouldn't even use them in the nursery because of the hazards associated with them (eg Rogor). However, they still se...
- 17 May 2024, 14:19
- Forum: Safety with Chemicals
- Topic: updating SDS's
- Replies: 8
- Views: 6272
Re: updating SDS's
Keep the SDSs for the ones you have purchased.
- 08 May 2024, 10:13
- Forum: Safety with Chemicals
- Topic: mini SDS
- Replies: 18
- Views: 1916
Re: mini SDS
Is it a legal requirement within NSW Dept. Schools to have/keep a chemical manifest on chemwatch? I agree it is a pain to use and would much rather create/use my own format. It is not a legal requirement for businesses with small quantities of chemicals on site to have a manifest. They are required...
- 06 May 2024, 16:17
- Forum: Safety with Chemicals
- Topic: mini SDS
- Replies: 18
- Views: 1916
Re: mini SDS
Rosalie - you're an ex-firefighter!! OMG! That is a surprise. Yep, agree, we are a school with comparatively small quantities of chemicals. Maybe if it was a fire in a chemical factory they may want to check on their way. Bigmack - don't get me on a rant about Chemwatch. So glad I am in a school sys...
- 06 May 2024, 13:41
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 1007
Re: Is this Cornflower ?
I thought borax was tetragenic? Mutagenic or something. So it is the long lasting problems, not just the corrosiveness issue.
If I was confident the powder in the bags was only cornflour, I would still throw it out as you don't know if it has been contaminated.
If I was confident the powder in the bags was only cornflour, I would still throw it out as you don't know if it has been contaminated.
- 06 May 2024, 07:41
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 1007
Re: Is this Cornflower ?
There is a process for disposing of unknowns - label it as "unknown chemical" and put it in with your next chemical clean up. There really is no other way.
- 03 May 2024, 12:54
- Forum: Miscellaneous
- Topic: Is this Cornflour ?
- Replies: 14
- Views: 1007
Re: Is this Cornflower ?
Feed some to Year 8?
- 02 May 2024, 07:28
- Forum: Safety with Chemicals
- Topic: mini SDS
- Replies: 18
- Views: 1916
Re: mini SDS
LOL! I tell myself that every morning ![Cheesy :cheesy:](./images/smilies/cheesy.gif)
![Cheesy :cheesy:](./images/smilies/cheesy.gif)
- 01 May 2024, 14:46
- Forum: Safety with Chemicals
- Topic: mini SDS
- Replies: 18
- Views: 1916
Re: mini SDS
If I get some time, I'll find the references for you. You won't have too much trouble convincing them all.
- 01 May 2024, 12:14
- Forum: Safety with Chemicals
- Topic: mini SDS
- Replies: 18
- Views: 1916
Re: mini SDS
I can give you NSW legislation, but Queensland is pretty much the same. The legislation is very clear on what needs to be in a SDS and there is also a prescribed format. Mini SDSs do not meet that requirement. The SDS must be produced by the manufacturer or supplier. Chemwatch, which puts together m...
- 30 Apr 2024, 07:37
- Forum: Announcements
- Topic: Welcome back to term 2
- Replies: 7
- Views: 4990
Re: Welcome back to term 2
Bigmack - you will get used to Riskassess. A great tool as long as all teachers use it. Happy to share some tips. The labelling feature is worth the subscription on its own. Familia with the Labeling , used that a lot at last school , Bluffing my way through the ordering section , but may ask you s...
- 29 Apr 2024, 12:21
- Forum: Announcements
- Topic: Welcome back to term 2
- Replies: 7
- Views: 4990
Re: Welcome back to term 2
Yep, we left home on the 7th May last year. Now but a distant memory.
Sadly, it is also nearly a year since my dad passed away.
Sadly, it is also nearly a year since my dad passed away.
- 29 Apr 2024, 07:50
- Forum: Announcements
- Topic: Welcome back to term 2
- Replies: 7
- Views: 4990
Re: Welcome back to term 2
Last term was one of the longest eleven weeks of my life! It seemed to drag on for ever and I was so pleased to have two weeks off. This time last year, I was in the final two weeks before heading off on 14 weeks leave, which ended up being five months but that's another story. Nothing as exciting t...