Search found 706 matches

by bigmack
28 Mar 2024, 16:33
Forum: Announcements
Topic: Happy Easter to you all
Replies: 1
Views: 7

Re: Happy Easter to you all

Calm before the storm for me Labbie .
Start new job next term . Looking forward but know what a break is too .
by bigmack
27 Mar 2024, 15:23
Forum: Free classifieds - 4 sale/swap/wanted/giveaway
Topic: Wanted .Copy of "Working in Science"
Replies: 5
Views: 198

Re: Wanted .Copy of "Working in the Science"

Thanks for the enquiry LabbieSeth . Actually I wanted the whole thing . I know a Labbie that has the Cert 4 and stuff but has never worked in a a school environment and has no idea and I thought it would help her as it is specific to what is real outside Pathology world . But as it happens , I have ...
by bigmack
27 Mar 2024, 10:22
Forum: Free classifieds - 4 sale/swap/wanted/giveaway
Topic: Wanted .Copy of "Working in Science"
Replies: 5
Views: 198

Re: Wanted .Copy of "Working in the Science"

Merilyn1 wrote: 27 Mar 2024, 10:03 I only have a hard copy. Keep me in mind if no one comes forward. I am just snowed under to find time try and scan it.
Will do Merilyn .
by bigmack
27 Mar 2024, 09:43
Forum: Free classifieds - 4 sale/swap/wanted/giveaway
Topic: Wanted .Copy of "Working in Science"
Replies: 5
Views: 198

Re: Wanted .Copy of "Working in the Science"

Doh , I just realised it’s called “Working in Science”
by bigmack
27 Mar 2024, 09:40
Forum: Safety with Chemicals
Topic: Chemical Storage
Replies: 9
Views: 343

Re: Chemical Storage

….. eg oxidisers are to be stored a long way from flammables. I remember seeing that when I first read the WHS recommendations on that Merilyn . They said IIRC , a distance no closer that 5 Meters but seeing as my Chem store was barely 3 meters long , I realised you just have to do the best with wh...
by bigmack
26 Mar 2024, 09:49
Forum: Miscellaneous
Topic: Cleaning of Wicks Used in Alkanols prac
Replies: 6
Views: 221

Re: Cleaning of Wicks Used in Alkanols prac

In my experience ,most wicks can be evaporated an or washed , but the higher alkanols like Pentanol and Octanol are very "oily" and are almost impossible to clean effectively .And they stink to high heaven :yuck: I found this out the hard way when the Chem teacher decided he now wanted som...
by bigmack
22 Mar 2024, 16:22
Forum: Miscellaneous
Topic: Cleaning of Wicks Used in Alkanols prac
Replies: 6
Views: 221

Re: Cleaning of Wicks Used in Alkanols prac

We always had a labeled set of each Spirit lamp . 6 x Methanol , Ethanol , Butanol , Pentanol and Octanol IIRC . I used to empty the remaining alcohol though filter paper back into a special bottle for storage until next year . Could then store the spirit lamps anywhere . Having the same burners mea...
by bigmack
22 Mar 2024, 14:45
Forum: Free classifieds - 4 sale/swap/wanted/giveaway
Topic: Wanted .Copy of "Working in Science"
Replies: 5
Views: 198

Wanted .Copy of "Working in Science"

Hi All . I once got a copy of this Manual Emailed to me by a member here many years ago when I was at my old school . I unfortunately no longer have a copy of it . I know it is very old but does anyone still have an electronic version they could Email me . Incidentally it was NSW DET manual that was...
by bigmack
22 Mar 2024, 14:31
Forum: Safety with Chemicals
Topic: Chemical Storage
Replies: 9
Views: 343

Re: Chemical Storage

Mat , sorry I was just editing my post above . But in my opinion , that article is very comprehensive but totaly over the Top . The ADG class ( Australian Dangerous Goods) class should give you enough info to deal with storage . DG storage cabnets are expensive . Start off with a Flammable liquids o...
by bigmack
22 Mar 2024, 12:51
Forum: Safety with Chemicals
Topic: Chemical Storage
Replies: 9
Views: 343

Re: Chemical Storage

Science Supply Australia and Modern Teaching aids used to have all that info in their printed Catalogs if you have one. It has the dangerous Goods codes. Heres a list I found on the internet . DG list.pdf So Cyclohexane is Class 3 or Flammable liquid ....it would go in your Flammable Liquid Cupboard...
by bigmack
14 Mar 2024, 22:12
Forum: Biology, Physics...
Topic: IEC Kundt's Tube Apperatus
Replies: 7
Views: 321

Re: IEC Kundt's Tube Apperatus

Well actually it was an eye opener for me . And iff’n IEC are following this , there were a few extra issues I had not encountered . Noise . Firstly , Electrical noise . Now , some of you may be aware that for many years I was a TV Technician and using Oscilloscopes was a daily thing . Well , I was ...
by bigmack
14 Mar 2024, 16:23
Forum: Biology, Physics...
Topic: frozen hearts - help!
Replies: 10
Views: 460

Re: frozen hearts - help!

I used to pull hearts from the freezer and stick them in a sink of warm water and they would be ready in an hour ir so . However , I think they would be fine if you just left them in cold water overnight . . Stick them back in the fridge when you get in , in the morning until needed. Not had to defr...
by bigmack
14 Mar 2024, 10:56
Forum: Biology, Physics...
Topic: IEC Kundt's Tube Apperatus
Replies: 7
Views: 321

Re: IEC Kundt's Tube Apperatus

Thanks Labbie.

Well the time has come . Today Mrs Bigmack was planing to use the Kundt’s tube but after much disappointment , she still doesn’t trust it …. so , she has asked me to come and help run the prac .
Hopefully she will see that it works .
by bigmack
13 Mar 2024, 13:40
Forum: Biology, Physics...
Topic: IEC Kundt's Tube Apperatus
Replies: 7
Views: 321

Re: IEC Kundt's Tube Apperatus

I worked out how to get the Two holes thing to work to demonstrate how a wind instrument such as a Recorder or flute works . I've also basically written a whole new operating Manual so that a teacher may follow it and get some meaningful results complete with printable work sheets that students can ...
by bigmack
13 Mar 2024, 12:43
Forum: Recipes and Pracs
Topic: Help please - High conc. CuSO4 / Cu(NO3)2 solutions
Replies: 5
Views: 500

Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions

I agree with Elizabeth .
I have never been asked for anything higher than 0.5 - 1mol/l for galvanic cell pracs .

I wonder if teacher has given you a typo
by bigmack
13 Mar 2024, 12:36
Forum: Chemistry and Labware - General
Topic: Waste from Redox Reactions
Replies: 2
Views: 264

Re: Waste from Redox Reactions

They are both screaming heavy metal waste bottle to me .
Depending on how much you have to get rid of , I’d evaporate as much water out of it first ( in a fume hood)
I hate paying ti dump water :whistling2:
by bigmack
13 Mar 2024, 09:07
Forum: Sourcing Materials & Eq Repairs
Topic: Spring Balances
Replies: 14
Views: 5983

Re: Spring Balances

Which type were they macca , and where have they broken?

Totally agree Merilyn , what a stupid thing for the teacher to request …… or was it just kids doing what kids do
by bigmack
08 Mar 2024, 22:40
Forum: Safety with Chemicals
Topic: Standard Operating Procedure (SOP) for removal of chemicals
Replies: 10
Views: 643

Re: Standard Operating Procedure (SOP) for removal of chemicals

I dunno . We are a school Education is our main goal surely . I sometimes wonder if us Lab techs get so wound up in all the safety stuff that we actually miss the whole point of why the heck we are here . Mercury is not good . Sure , but it is also an amazing element with properties that no other el...
by bigmack
26 Feb 2024, 09:33
Forum: Biology, Physics...
Topic: Biology
Replies: 4
Views: 404

Re: Biology

Found it .
viewtopic.php?p=41246#p41246

20% Gycerol
80% Water
Stir in a smidgen of Bromothymol Blue or Methyl Orange powder to colour .
by bigmack
25 Feb 2024, 17:30
Forum: Biology, Physics...
Topic: Biology
Replies: 4
Views: 404

Re: Biology

I used to make up a small batch of dye for practicing . I can’t remember the exact mix , but the original dyes from Southern Biological had the recipe on them . IE , what % glycerol , water and the particular dye . Made up some agar wells and would place them in a petrie dishes and cover with water ...