Australia's Science Forum

Anna Z wrote: ↑04 Aug 2023, 15:20 Could you borrow them from another school whilst waiting on ordering them ?

LOL, I remember being asked to buy these . Then they never got used . I know one school that has them sitting there doing nothing .

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 .

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 .

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...

judy2018 wrote: ↑22 Jun 2023, 10:59 Hi All
Do teachers have to do a RISK ASSESSMENT for all EXPERIMENTS ?
Thank you
Judy

In NSW , as long as they follow the requirements of the CSIS , then they are .

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 ....

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 .

Good to know Macca,
I tried a similar method
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macca wrote: ↑08 Jun 2023, 08:39 Bottle of Black Douglas would be lovely lol

Done ......if you still are chucking them

Anna Z wrote: ↑07 Jun 2023, 15:50 I'll pay you $20 towards beer for you...send them down here

$30 ....and the beer

Macca ,
If you are going to throw them out , post them to me . They are safe to send through the mail .

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 , ...

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...

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...

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 ...

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...

elaruu wrote: ↑25 May 2023, 09:52 Hmmm. He says it is an essential part of the curriculum.....

I’d say he’s talking out is bottom.

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 ...

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 .

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...