Search found 715 matches
- 04 Aug 2023, 11:39
- Forum: Chemistry and Labware - General
- Topic: Year 10 DNA Pracs.
- Replies: 24
- Views: 14634
Re: Year 10 DNA Pracs.
We did Rosalie , but maybe our kids were too aggressive as we only got one reuse out of them before they started blowing out at the edges . In the end , Head Teacher said not to reuse them .
- 27 Jul 2023, 14:56
- Forum: Chemistry and Labware - General
- Topic: Ammonium Phosphate?
- Replies: 12
- Views: 7490
Re: Ammonium Phosphate?
Bit late to the party , but to answer the OPs question , di-Ammonium phosphate is what is used in wine making and in distilleries . It is commonly called DAP .
- 28 Jun 2023, 12:33
- Forum: Chemistry and Labware - General
- Topic: A suitable demo?
- Replies: 10
- Views: 5437
Re: A suitable demo?
Sometimes you just have to have a go and see how bad can it be .Nobody said “don’t try this it at home “ so he we go. Half a teaspoon of Salt and 5mls of Metho .Stirred in a standard old Drinking glass , not even a borosilicate Beaker , it may crack . IMG_8203.jpeg Lighting stick? Guess thats a safe...
- 22 Jun 2023, 21:57
- Forum: Miscellaneous
- Topic: Teachers
- Replies: 3
- Views: 5156
- 19 Jun 2023, 12:14
- Forum: Chemistry and Labware - General
- Topic: Using weight to find volume
- Replies: 3
- Views: 3885
Re: Using weight to find volume
Actually sounds like a great idea Marama :thumbup: I was wondering how much the temp of the water would throw the accuracy (as density changes with temp ) , but it looks pretty damn good up to at least room Temp .But at higher temps it is still significantly more than glassware . °C .0 .1 .2 .3 .4 ....
- 15 Jun 2023, 14:25
- Forum: Sourcing Materials & Eq Repairs
- Topic: storage of pH meters
- Replies: 2
- Views: 4368
Re: storage of pH meters
I made up some little wooden holders after the kids kept knocking them over in the Labs and spilling the Storage juice .Also put a little warning notice on it .
PS , thanks Briony for sending me a pic .
PS , thanks Briony for sending me a pic .
- 08 Jun 2023, 13:18
- Forum: Sourcing Materials & Eq Repairs
- Topic: Bromine
- Replies: 9
- Views: 5240
Re: Bromine
Good to know Macca,
I tried a similar method
viewtopic.php?p=47842#p47842
viewtopic.php?p=47854#p47854
I tried a similar method
viewtopic.php?p=47842#p47842
viewtopic.php?p=47854#p47854
- 08 Jun 2023, 12:45
- Forum: Safety with Chemicals
- Topic: Radioactive isotopes
- Replies: 17
- Views: 9681
- 07 Jun 2023, 16:48
- Forum: Safety with Chemicals
- Topic: Radioactive isotopes
- Replies: 17
- Views: 9681
- 07 Jun 2023, 14:16
- Forum: Safety with Chemicals
- Topic: Radioactive isotopes
- Replies: 17
- Views: 9681
Re: Radioactive isotopes
Macca ,
If you are going to throw them out , post them to me . They are safe to send through the mail .
If you are going to throw them out , post them to me . They are safe to send through the mail .
- 07 Jun 2023, 08:21
- Forum: Sourcing Materials & Eq Repairs
- Topic: micropipettes
- Replies: 5
- Views: 4179
Re: micropipettes
We got the 10ul ones from Southern Bio too . They have the dual action . Push and release to draw up sample push and extra push to release sample . Now you might think how hard can it be to use a micro pipette? Despite demonstrating to students multiple times about how to load and dispense sample , ...
- 05 Jun 2023, 18:20
- Forum: Biology, Physics...
- Topic: Disposal of used agar plates
- Replies: 33
- Views: 17759
Re: Disposal of used agar plates
I used our Microwave ( which was the HTs old one from home ) to make Agar plates after learning about it from another Labbie at a Collegial meeting . It certainly boils agar very well and if you aren’t quick on the button , it sure does make one hell of a mess . I have do doubt it would work as a st...
- 02 Jun 2023, 12:59
- Forum: Biology, Physics...
- Topic: Disposal of used agar plates
- Replies: 33
- Views: 17759
Re: Disposal of used agar plates
Always remember that pressure cookers are sold in shops where idiots can buy them . They have to be made idiot proof and safe or we would be hearing reports on the news of people being killed or badly burned by them . Depending on the size if them , you’ll be lucky to fit more than about 25 plates i...
- 31 May 2023, 17:57
- Forum: Chemistry and Labware - General
- Topic: Lighting Bunsens
- Replies: 3
- Views: 4228
Re: Lighting Bunsens
We tried the flint lighters for lighting Oxy torches but there was no way the kids , especially the younger nes could handle them . One of our teachers tried cigarette lighters and they were very successful . Only two went into the class room each prac . We gave up on little matches and now use the ...
- 31 May 2023, 12:27
- Forum: Biology, Physics...
- Topic: Disposal of used agar plates
- Replies: 33
- Views: 17759
Re: Disposal of used agar plates
When I first started , I was told by my off sider to store them in the fume hood until the GA lit a fire to burn off excess green waste then bring them over and chuck’m on the bonefire . I knew no better but after about 6-9months I was asking when was the bonefire ment to happen . Discovered that th...
- 25 May 2023, 15:02
- Forum: Sourcing Materials & Eq Repairs
- Topic: Bromine
- Replies: 9
- Views: 5240
- 24 May 2023, 16:42
- Forum: Chemistry and Labware - General
- Topic: Burettes
- Replies: 2
- Views: 3498
Re: Burettes
Is all of them or just one or two ? Sounds like you have done pretty much all you can . If they are the ones with Teflon tips , I’m thinking the tip is damaged . You could try slicing a small bit off the end as parallel as you can with a Stanley knife . Failing that , the round filing cabinet might ...
- 24 May 2023, 13:10
- Forum: Biology, Physics...
- Topic: Spectrum Tubes
- Replies: 8
- Views: 4099
Re: Spectrum Tubes
Yes I would always recommend having a spark gap set to the widest setting where it will still arc consistently while using anything connected to an induction coil . If the device connected requires less voltage then the spark will stop . That is OK .
- 23 May 2023, 15:23
- Forum: Biology, Physics...
- Topic: Spectrum Tubes
- Replies: 8
- Views: 4099
Re: Spectrum Tubes
I got one of these power supplies for ours . https://www.chemtalk.com.au/viewtopic.php?p=48804#p48804 I was looking at your holder and it reminded me . We got one of those in our set of tubes from serrata ( MTA) . Teacher whinged that all the tubes were glowing . She was kinda right . If the probe w...
- 23 May 2023, 10:35
- Forum: Biology, Physics...
- Topic: Spectrum Tubes
- Replies: 8
- Views: 4099
Re: Spectrum Tubes
Annette , care to throw up a picture of the induction coil and even the tubes