Search found 352 matches

by bigmack
07 May 2020, 12:19
Forum: Sourcing Materials & Eq Repairs
Topic: Heating Mantles
Replies: 6
Views: 979

Re: Heating Mantles

About 4-5 years . No issues with it so far :whistle:
by bigmack
07 May 2020, 10:42
Forum: Sourcing Materials & Eq Repairs
Topic: Heating Mantles
Replies: 6
Views: 979

Re: Heating Mantles

We got one of these off Serrata and the teachers have been happy with it so far. heating Mantle.JPG Note: it has a Power controller not a Temperature controller .Despite saying Temp adjust on the front . This in my opinion is a better option than a temp controller . Why, ...because when teachers who...
by bigmack
09 Apr 2020, 11:59
Forum: Biology, Physics...
Topic: Malus' Law apparatus
Replies: 2
Views: 1762

Re: Malus' Law apparatus

I think we did this last year . We still had some old optical tracks from years ago . Put a Light box at one end , a Datalogger with Lux sensor ( probably could have used a regular Lux meter ) at the other and used a IEC Polaroid Filter ( HL1883-060) in between . I think they plotted Lux against the...
by bigmack
20 Feb 2020, 14:47
Forum: Sourcing Materials & Eq Repairs
Topic: Bovine eyes
Replies: 11
Views: 3002

Re: Bovine eyes

We get ours from
Northern Co-Operative Meat Company Ltd
10615 Summerland Way
Casino NSW 2470

(02) 66600790
Email: shipping@cassino.com.au

They are free to schools . They deliver to our local butcher who we have to pay $15 delivery . They are fresh .

Note : the double S in the email is correct .
by bigmack
18 Feb 2020, 08:19
Forum: Biology, Physics...
Topic: Electron Micrographs
Replies: 4
Views: 2187

Re: Electron Micrographs

Not sure how to post them here? Click on "full editor and preview" Then when you write a reply , you will see an attachments button . he you can find a pic or file on your PC and attach it . Just be aware that pics have to be resized to 800x600 pixels or they will be rejected . You can resize a pic...
by bigmack
18 Feb 2020, 08:13
Forum: Sourcing Materials & Eq Repairs
Topic: MTA products going downhill fast?
Replies: 19
Views: 4677

Re: MTA products going downhill fast?

MariaQ wrote:
18 Feb 2020, 07:24
and BTW Im still waiting for a reply to my email........ :oops:
Give them a ring . Have your invoice /order number ready and they will sort it there and then …….well that was my experience .
by bigmack
14 Feb 2020, 12:58
Forum: Biology, Physics...
Topic: Electron Micrographs
Replies: 4
Views: 2187

Re: Electron Micrographs

Alas I just dug our set out which does have the index but its the 2nd edition 1999, sorry .

have to wonder how much different they are and if one could be compared to the other . If you are interested I might see if I can copy some for you .
by bigmack
14 Feb 2020, 12:46
Forum: Recipes and Pracs
Topic: Gel electrophoresis
Replies: 7
Views: 3151

Re: Gel electrophoresis

May gets some hints Here
by bigmack
11 Feb 2020, 13:39
Forum: Sourcing Materials & Eq Repairs
Topic: MTA products going downhill fast?
Replies: 19
Views: 4677

Re: MTA products going downhill fast?

MariaQ wrote:
11 Feb 2020, 08:47
Thing is, I didn't think I was buying cheap, I was buying what I saw in the catalogue which matched my previous purchase.
That's what I did too Maria .

Incidentally , the new MTA catalogue arrived yesterday and I looked up the switch and sure enough they have the same deceiving picture .
by bigmack
10 Feb 2020, 08:38
Forum: Sourcing Materials & Eq Repairs
Topic: MTA products going downhill fast?
Replies: 19
Views: 4677

Re: MTA products going downhill fast?

Had a similar problem last year . Pic in Catalogue showed a Switch that was labelled with OBB ……we've had them before and they were good . When my parcel arrived they were a Chinese copy . One screw instead of two holding the lever so it could easily loosen and be turned out of alignment and the spr...
by bigmack
06 Feb 2020, 12:40
Forum: Sourcing Materials & Eq Repairs
Topic: Trough for Metal in Water Demo
Replies: 8
Views: 2264

Re: Trough for Metal in Water Demo

MissKat wrote:
06 Feb 2020, 10:08
bigmack wrote:
06 Feb 2020, 09:28
Curious what the metal in water Demo is :-?
Sorry, I missed out the 'alkali' part in the title.
Oh thanks Misskat ….LOL , should have worked that out
by bigmack
06 Feb 2020, 09:33
Forum: Recipes and Pracs
Topic: Eco friendly Baggie Science?
Replies: 10
Views: 2405

Re: Eco friendly Baggie Science?

What about using a test tube with a balloon on the end ?
by bigmack
06 Feb 2020, 09:28
Forum: Sourcing Materials & Eq Repairs
Topic: Trough for Metal in Water Demo
Replies: 8
Views: 2264

Re: Trough for Metal in Water Demo

Curious what the metal in water Demo is :-?
by bigmack
06 Feb 2020, 09:16
Forum: Chemistry and Labware - General
Topic: Magnets
Replies: 9
Views: 2613

Re: Magnets

You can remagnetise old magnets with the neodymium magnets. I haven't actually tried it yet, but I saw it on YouTube. Maybe it'll work to strengthen the dodgy ones too. You can only try. Yes it does work . We have a special re-magnetizer . it is a neodymium magnet moulded into a plastic handle .Jus...
by bigmack
06 Feb 2020, 09:12
Forum: Sourcing Materials & Eq Repairs
Topic: Hoffman"s Apparatus
Replies: 3
Views: 1657

Re: Hoffman"s Apparatus

Interesting , we have always used Sulfuric acid . Good to know the carbon electrodes work . We just got some replacement electrodes with the Platinum foil type …….bloody expensive .