Australia's Science Forum

Can anyone tell me if there's an actual difference between the red and black electrodes? Is it just the colour of the wire or is there a physical difference that would impact its use? There is no difference Rosalie . They are usually both Platinum. The only reason they are colour coded is so the te...

All good Alice . I was a bit hoping that it was one of your cabinets ,and hadn't considered drawers before .

Westlab - Alice wrote: ↑26 Aug 2024, 15:51 Are you trying with the F series standard gratnells trays?

Not sure Alice . They are the ones that we got when Westlabs did our Lab revamp a few years ago .

Your response suggests there are other series then

At my old school , we had solid metal ones .They had proper pointed pivots and adjustable bearing cups . ......and they were over 60 years old . I want all metal ones also. Our kids are rough on equipment, and plastic would only last a year or two! After a fair bit of searching, I found some metal ...

Acids in one and bases in the other. Solids above liquids. I agree with Merilyn. Separate the acids and bases. I'm not sure which ones you'd put the not-specifically acid or base ones though. Maybe where they fit? Check sds for storage compatibility on those ones. Thanks Merilyn and Rosalie . That ...

At my new school we have two Corrosives Cabinets. they are both pretty full of a mixture of solids and liquids , Iodine , Bromine etc .It's seems like a random pitchpotch . Is there a better way to utilize two Corrosive cabinets ? My thinking is that it would be better to have all the acids in one a...

At my new school , they use a lot of pulleys , single and double . they are the plastic wheels with aluminum frame . They are absolute crap and we are looking at getting all metal ones .They have a tine plastic axial that just wears out or the aluminum side frames get bent . Pulleys.jpg At my old sc...

Nice one Marama .
Thankyou .I get your methodology.
You sound like an experienced cook in the kitchen .
How big was your “pinch of salt”?

Put a coil of copper wire in the Silver nitrate . Silver will come out of solution and build up on the copper wire . (Displacement reaction ) . You can then collect it as actual Silver metal . When you retire ,it will be worth more than a goldwatch :cheesy: Why are you wanting to get rid of Silver n...

Just a quick update. Biotek made the broths on Monday and we received them , believe it or not via Aussie Post the next day . The prac was done on the Wednesday and this morning (Thursday) , I found “classic “ textbook Petrie dishes in the incubator . But man-O-man , the prep-room stunk of old socks...

I use something similar to the first two for coloured dyes. I haven't had any issues with the bottles deteriorating and they seem to be student resilient (I haven't had any returned broken). I would personally go for the one with a harder/thicker plastic as that is what I have here and it seems to ...

OK , contacted Bio-Tek . They can do the Cultures and they are a bit cheaper than Southern Bio . Also being in QLD , I'll get them quicker . :thumbup: But...Apparently there are no Mastrings available in Australia....all sold out . O'l mate told me that the company in UK that makes them is having a ...

PeterK wrote: ↑08 Aug 2024, 08:32 10mls of broth is plenty, you just need 50 μl for each plate to spread. You will need the broths again for the second part, the student experiment. I do find the broths from Southern Bio hit and miss though.

OK thanks Peter.
have you found a better supply ?

I've realized I have a mix of 5 different types . I need to order some more and I don't know which type to get . any advice please . We only ever had glass droppers at old school . The two on the left look identical but they aren't . one has a softer plastic and the lids are different and non interc...

Our mob is doing antibiotic Mandatory Prac with Mastrings (LOL had to google that word and recognized them in our fridge) and E.coli & Staphylococcus . I can get 10mls of each Broth from Southern Bio . I have little idea about it's use as at our old school we bought the plates already inoculated...

Been asked to get this ready for Yr11 . Teacher has been complaining that so many pracs don't work . I have now got in the habit of testing each one before sending it out if I have time. This one come from Nelson Qscience Pg410. Prac.jpg Now if you follow the instructions and use 3ml of 0.02M KMNO4 ...

You’re going to be missed around here Merilyn . You have always been our trusted WHS guru . Can’t say I blame you going back to a Nursery . Nice . Life / work balance is everything . Good on you for doing whats right for you . :thumbup: Please pop in from time to time . Ironically , I find WHS compl...

Bigmack - I have an appointment on Thursday to talk to my principal (who is also the D&T teacher) to discuss 3D printing one (or more) of these. What info do I need to take in with me to build my case? Hi Rosalie I guess its a matter of Cost verses skills and time . also how many do you intend ...

Woow , had it been that long Labbie ?

I remember . There were all those Yammer things that tried to fill the gap ……but I really hated them . Constant Emails full of notification's and bloody logins .

You can’t beat a real forum .

Thankyou Westlab for keeping the space .

Had teacher ask for this prac but was nervous because she had never had much success. When queried , she mentioned fresh strawberries coffee filter papers and refrigerated Isopropyl alcohol . I told her we never had problems with Frozen strawberries , Tulle or other coarse weave netting and metho . ...