Australia's Science Forum

I always use gelatin

Hi All,

Im just wondering, does anybody know the status of the NSW DET CSIS package? Has it been updated? Im in a NSW AIS school and I want to know so I can get the AIS to chase up the new version if available.

Cheers MariaQ

Yep I discovered this yesterday!

No lab coats here, students tuck their ties in and hair is tied back, but 99% sensible students. I do have disposable aprons for the larger dissections. We have never had a problem.

Maria

Hi Guys,

My partime labbie is off to new adventures so looking for a new partner in crime, please see link. Great staff and school

https://www.ccgs.nsw.edu.au/sites/defau ... time_0.pdf

Cheers Maria

Hi, I did a quick google and this came up, looks like just tripods with beakers and plastic filter funnels, maybe use microscope lamps if you still have them?? All equipment we already have? https://www.researchgate.net/figure/Berlese-Tullgren-funnel-for-micro-arthropods-extraction-It-contains-a-sam...

Hi Kimmy, from my understanding, thats just a straight forward titration, not a back titration. Cheers M

Hi Guys,

Its where you cant titrate one substance directly against another, so you react A with B in excess and then titrate residual B against C and calculate the amount of A by working out how much of B was used in the first reaction! Hope that makes sense!

Hi All,

My teachers are looking at doing a back titration, any tried and tested methods out there you are willing to share??

Hi Bigmack, I agree when I got the teats they were a bit small for some tops and could easily be pulled out of the teat hole, so definitely not a universal size. And like yourself, over a few months have already found a number starting to perish, so in many ways would prefer to go back to the rubber...

Hi Guys,

Just wondering if anyone has used the specific gravity kit supplied with Ohaus Scout balances? I have followed all the instructions, and get to a certain point, but cant get it to actually weigh anything? anyone?? MariaQ

Westlab are also good, I compare with Serrata and buy the ones I want from the cheapest supplier.

Ok, thanks for that, I was looking at the upgraded one, we want to keep fairly constant temps.

MariaQ

Im looking at buying some of the nanoheat hotplates from Westlab, has anyone got any experience with these?? Cheers MariaQ

:D Hi All, Just wondering on this safety shower thread, I believe that they are also supposed to be tested and tagged once a year as per fume cupboards, which seems overkill in a school setting, I always think the standards are written for industrial settings not schools were we have very small amou...

We use it in the prac where the students work out the empirical formula of tin iodide that they have created.

MariaQ

Hi All,

Just wondering if anyone knows where I should store dichloromethane? I have safe handling and disposal details, but for storage all I can find, is in glass and kept away from light? So should I just put in on the "Toxic" shelf??

Cheers MariaQ

Hi All, Since posting this, Ive found an answer, Serrata now sell silicon teats that replace the rubber ones, at a cost of $3.00 for 10, why they didnt tell me this yesterday when I was talking to them about the rubber ones is beyond me #-o anyway being silicon they should last a bit longer, cheers ...

Hi All, I have hundreds and hundreds of dropper bottles with droppers and rubber teats, most of our chemicals go out into the labs this way. Now Serrata have stopped selling the rubber teat, and or the dropper assembly separately so effectively when the rubber perishes I have to buy the whole new bo...

Yes Merilyn1, thats my point, it is a great experience I have done it before, but Im not being paid and everyone else is. I get my pay averaged, but this does not mean Im being paid for that time. Im medical officer and have responsibilities and duties. Its a humanitarian tour were we build houses i...