Search found 719 matches
- 22 Mar 2024, 14:45
- Forum: Free classifieds - 4 sale/swap/wanted/giveaway
- Topic: Wanted .Copy of "Working in Science"
- Replies: 5
- Views: 8152
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...
- 22 Mar 2024, 14:31
- Forum: Safety with Chemicals
- Topic: Chemical Storage
- Replies: 14
- Views: 9782
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...
- 22 Mar 2024, 12:51
- Forum: Safety with Chemicals
- Topic: Chemical Storage
- Replies: 14
- Views: 9782
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...
- 14 Mar 2024, 22:12
- Forum: Biology, Physics...
- Topic: IEC Kundt's Tube Apperatus
- Replies: 7
- Views: 3714
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 ...
- 14 Mar 2024, 16:23
- Forum: Biology, Physics...
- Topic: frozen hearts - help!
- Replies: 10
- Views: 8212
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...
- 14 Mar 2024, 10:56
- Forum: Biology, Physics...
- Topic: IEC Kundt's Tube Apperatus
- Replies: 7
- Views: 3714
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 .
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 .
- 13 Mar 2024, 13:40
- Forum: Biology, Physics...
- Topic: IEC Kundt's Tube Apperatus
- Replies: 7
- Views: 3714
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 ...
- 13 Mar 2024, 12:43
- Forum: Recipes and Pracs
- Topic: Help please - High conc. CuSO4 / Cu(NO3)2 solutions
- Replies: 6
- Views: 7354
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
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
- 13 Mar 2024, 12:36
- Forum: Chemistry and Labware - General
- Topic: Waste from Redox Reactions
- Replies: 2
- Views: 2935
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
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
- 13 Mar 2024, 09:07
- Forum: Sourcing Materials & Eq Repairs
- Topic: Spring Balances
- Replies: 14
- Views: 10141
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
Totally agree Merilyn , what a stupid thing for the teacher to request …… or was it just kids doing what kids do
- 08 Mar 2024, 22:40
- Forum: Safety with Chemicals
- Topic: Standard Operating Procedure (SOP) for removal of chemicals
- Replies: 10
- Views: 4593
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...
- 26 Feb 2024, 09:33
- Forum: Biology, Physics...
- Topic: Biology
- Replies: 4
- Views: 2794
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 .
viewtopic.php?p=41246#p41246
20% Gycerol
80% Water
Stir in a smidgen of Bromothymol Blue or Methyl Orange powder to colour .
- 25 Feb 2024, 17:30
- Forum: Biology, Physics...
- Topic: Biology
- Replies: 4
- Views: 2794
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 ...
- 23 Feb 2024, 10:41
- Forum: Biology, Physics...
- Topic: IEC Kundt's Tube Apperatus
- Replies: 7
- Views: 3714
Re: IEC Kundt's Tube Apperatus
Another problem my wife had commented on was that the Students had found it difficult to relate the diagrams of Nodes and Anti-nodes in the IEC manual to the way the equipment was set up . IE the closed end in thebook was on the Left , while the apperatus is setup with the closed end on the right . ...
- 23 Feb 2024, 10:26
- Forum: Biology, Physics...
- Topic: IEC Kundt's Tube Apperatus
- Replies: 7
- Views: 3714
IEC Kundt's Tube Apperatus
We bought one of these several years ago . The teacher said it did not work .Some results were OK on the Open tube tests but it was useless on the closed tube tests . At the time , I remembered realising that the speaker in it was really bad at low frequencies and next time , it was used with a bett...
- 22 Nov 2023, 16:46
- Forum: Miscellaneous
- Topic: Attachment - how to add
- Replies: 2
- Views: 8308
Re: Attachment - how to add
Hi Kimmy What kind if attachment are you trying to add ? If its a picture , here is a “how to” I posted a while back . Always remember that to add an attachment , you must click the “Full Editor & Preview “ button at bottom first. I forgot to add that very important step at the start of the inst...
- 12 Oct 2023, 09:58
- Forum: Chemistry and Labware - General
- Topic: Dresden ??? jar
- Replies: 6
- Views: 5288
Re: Dresden ??? jar
I would love to see a pic of the top and also of the rubber bung removed to have a better look at it but, I think the name is Dreschel Bottle It also seems to be called a Dressel bottle and a Drechsler bottle It is a Gas washing Jar as far as I can tell . Drechsler.jpg The inverted level marks I thi...
- 11 Oct 2023, 12:46
- Forum: Chemistry and Labware - General
- Topic: Dresden ??? jar
- Replies: 6
- Views: 5288
Re: Dresden ??? jar
Its a curly one mtg. The upside down measurements are unique. I even tried putting it into google image search. Best I could find was an image on something similar .It was used in early Blood transfusions .May not even be close . IMG_8863.jpeg I found a similar new glass product called a glass buffe...
- 11 Oct 2023, 10:38
- Forum: Forum Support Desk
- Topic: How to post a picture on Chemtalk
- Replies: 8
- Views: 17618
Re: How to post a picture on Chemtalk
If you are posting Pics from an Iphone , you will still need to resize pics first .( I'm sure there would be an android version too) I have a free app called "resize It " .It is also handy for rotating pics that appear sideways when you post them . The trick for sideways pic is to click o...
- 05 Oct 2023, 10:58
- Forum: Forum Support Desk
- Topic: How to post a picture on Chemtalk
- Replies: 8
- Views: 17618
Re: How to post a picture on Chemtalk
If you are posting Pics from an Iphone , you will still need to resize pics first .( I'm sure there would be an android version too) I have a free app called "resize It " .It is also handy for rotating pics that appear sideways when you post them . The trick for sideways pic is to click on...