Search found 861 matches

by Merilyn1
11 May 2021, 14:45
Forum: Miscellaneous
Topic: Food technology ordering program
Replies: 5
Views: 166

Re: Food technology ordering program

There is nothing similar for Food Tech as far as I'm aware. I think most F/Techies rely on a paper system. For a brief time, I did a bit of F/T once and I set up spreadsheets which would list the ingredients, what each group would need and then total how much I needed to buy. I even included how muc...
by Merilyn1
10 May 2021, 15:27
Forum: Safety with Chemicals
Topic: Hazardous Chemical Register
Replies: 40
Views: 8892

Re: Hazardous Chemical Register

I have a soft copy SDS for hand sanitiser and list it in the register. However I don't provide a copy of the SDS in every classroom. For things like flyspray, I now choose to have the SDS for one brand and let that cover all brands. I can't see I am ever going to get staff to only purchase one bran...
by Merilyn1
10 May 2021, 08:17
Forum: Biology, Physics...
Topic: Phenolphthalein Agar
Replies: 160
Views: 51544

Re: Phenolphthalein Agar

The microwave when no one is looking?? :giggle:
(Actually - I probably wouldn't put this in the microwave with the chemicals it contains).
by Merilyn1
10 May 2021, 08:14
Forum: Biology, Physics...
Topic: Melting agar
Replies: 9
Views: 210

Re: Melting agar

I was really trying to avoid the whole process of cranking up the autoclave. Microwave worked a treat. No one noticed the smell...
by Merilyn1
10 May 2021, 08:13
Forum: Biology, Physics...
Topic: Broth for Pasteur experiment
Replies: 36
Views: 6758

Re: Broth for Pasteur experiment

I'll 'fess up. A few years ago, at a different school, the Bio teacher and I were perplexed why the swan neck tubes had growth and the straight tubes didn't. We may have done a bit of a swap around :whistling2: :D
by Merilyn1
07 May 2021, 12:09
Forum: Biology, Physics...
Topic: Melting agar
Replies: 9
Views: 210

Re: Melting agar

So, the stage was set - all teachers were on class. I snuck in with my bottle, zapped it a few times for one minute on 50% and voila! I have liquid agar. I did have to air out the staffroom before they got back :D
by Merilyn1
07 May 2021, 11:12
Forum: Safety with Chemicals
Topic: LEAD NITRATE
Replies: 34
Views: 8926

Re: LEAD NITRATE

That is a ridiculous amount! No they are not getting that much. Do you have spotting trays? (Ceramic tiles with small wells). With these they only need a few drops of the chemical. We have given up using lead nitrate. I am so pleased, because although we worry about what the students handle, no one ...
by Merilyn1
07 May 2021, 10:34
Forum: Biology, Physics...
Topic: Melting agar
Replies: 9
Views: 210

Re: Melting agar

I could wait until there's no teachers around! My agar is probably cleaner than what they've left behind in the fridge :giggle:
by Merilyn1
07 May 2021, 10:20
Forum: Biology, Physics...
Topic: Melting agar
Replies: 9
Views: 210

Melting agar

So I've had a student that has been a bit airy fairy about how many agar plates she was going to need. I cooked up enough agar for an extra 20 plates. I didn't want to pour it because I suspected I would be wasting 20 petri dishes. So I sealed up the (Schott) bottle and put it in the fridge. Of cour...
by Merilyn1
07 May 2021, 10:09
Forum: Biology, Physics...
Topic: Phenolphthalein Agar
Replies: 160
Views: 51544

Re: Phenolphthalein Agar

Wrap it up in a few layers of cling wrap. This will help although I've never had to keep it longer than a few weeks.
by Merilyn1
07 May 2021, 07:46
Forum: Safety with Chemicals
Topic: Hazardous Chemical Register
Replies: 40
Views: 8892

Re: Hazardous Chemical Register

I'm guessing they have to draw a line in the sand somewhere which does make it sound a bit odd. All I know is suddenly I wasn't chasing SDSs for fly spray anymore - always guaranteed that every person would buy a different brand! And don't bother with school paints, PVA glue as they are all non-haza...
by Merilyn1
06 May 2021, 14:42
Forum: Safety with Chemicals
Topic: Hazardous Chemical Register
Replies: 40
Views: 8892

Re: Hazardous Chemical Register

Thanks Merilyn! Would you consider the disinfectants and hand sanitisers to also be consumer products? I would think that they shouldn't need to have SDS unless there is a large quantity stored on site. This will sound odd, but this was advice direct from Safework NSW a couple of years ago: If the ...
by Merilyn1
06 May 2021, 12:08
Forum: Safety with Chemicals
Topic: Hazardous Chemical Register
Replies: 40
Views: 8892

Re: Hazardous Chemical Register

To offer some relief - under legislation, the chemical register only needs to include hazardous chemicals. Of course, the problem is the definitive answer is on the safety data sheet. Up to you what you do with these non-hazardous SDSs. For Science, I do include hazardous and non-hazardous chemicals...
by Merilyn1
06 May 2021, 07:41
Forum: Recipes and Pracs
Topic: chalk crushing
Replies: 9
Views: 409

Re: chalk crushing

I'm the wire gauze fan as well
by Merilyn1
04 May 2021, 15:18
Forum: Chemistry and Labware - General
Topic: Flame Test
Replies: 7
Views: 387

Re: Flame Test

Oh why?? Agree, not normally a prac that anyone would consider doing with Year 7. If the teacher insists, I'd be soaking paddle pop sticks in solution. Don't give them spray bottles 8O
Better still a demonstration or a Youtube video!
by Merilyn1
03 May 2021, 08:24
Forum: The Lab Tech Position
Topic: Job Description
Replies: 87
Views: 47414

Re: Job Description

Here, here!! Thanks Annette for sharing this with us. So many valid points - it especially opened my eyes to the fact that teachers say they are over loaded, we are now being expected to trial pracs because they don't have the time to do it themselves. Or they need pracs that can be done quickly so ...
by Merilyn1
30 Apr 2021, 10:23
Forum: Recipes and Pracs
Topic: Help!! Meat tenderiser alternative
Replies: 25
Views: 916

Re: Help!! Meat tenderiser alternative

Oh sorry Merilyn, I didn't read your comment properly! The second class is doing the prac today so I will have a play when all the equipment comes back. I should go and make the extraction buffer solution up now without the meat tenderiser so I can do the comparison! Did you? I didn't notice - so n...
by Merilyn1
30 Apr 2021, 08:57
Forum: Recipes and Pracs
Topic: Help!! Meat tenderiser alternative
Replies: 25
Views: 916

Re: Help!! Meat tenderiser alternative

I looked in Woolworths last week and couldn't buy any. We have an Extension Science student using it, thankfully I had stocked up last time someone needed it so the student should have enough. Something to think about for next time though. It sounds like it's not needed according to some other reci...
by Merilyn1
29 Apr 2021, 14:01
Forum: Recipes and Pracs
Topic: Help!! Meat tenderiser alternative
Replies: 25
Views: 916

Re: Help!! Meat tenderiser alternative

I looked in Woolworths last week and couldn't buy any. We have an Extension Science student using it, thankfully I had stocked up last time someone needed it so the student should have enough. Something to think about for next time though.
by Merilyn1
20 Apr 2021, 15:34
Forum: Biology, Physics...
Topic: Prepared slides deterioration time
Replies: 5
Views: 498

Re: Prepared slides deterioration time

Two years seems a bit rough, especially what they charge for them. I assume they have been stored in a container out of light? I'd be contacting them and letting them know. I've certainly had slides much older that were still okay. Can't say at what point they would usually fade though. I've bought ...