Search found 135 matches

by Robdean
10 Nov 2011, 13:45
Forum: Sourcing Materials & Eq Repairs
Topic: Labtek
Replies: 8
Views: 3388

Re: Labtek

Haven't bought anything as yet but they were very helpful recently in sourcing some samples of gloves I was after, so I'd recommend them on their customer service. As I only needed a couple of pairs, I was impressed that they gave them to me without obligation!
by Robdean
08 Nov 2011, 13:14
Forum: Recipes and Pracs
Topic: Preserved specimens.
Replies: 43
Views: 21491

Re: Preserved specimens.

I might be alone on this but this is my thought on the matter. We have numerous specimens which have been here much longer than I have (15 years) by the looks of them. They are very likely to be in formalin, no way of knowing. BUT I feel seeing the formalin is regarded as carcinogenic I am reluctant...
by Robdean
16 Sep 2011, 12:21
Forum: Sourcing Materials & Eq Repairs
Topic: Thread for pulleys
Replies: 13
Views: 3770

Re: Thread for pulleys

Hi Maza,

Thanks for that - much appreciated!

Robyn
by Robdean
15 Sep 2011, 14:17
Forum: Recipes and Pracs
Topic: Acidified Barium Nitrate
Replies: 4
Views: 2170

Re: Acidified Barium Nitrate

Hi Judy,
Have just this minute finished getting this prac ready and we're using 7% barium chloride and conc HCl.
by Robdean
14 Sep 2011, 10:35
Forum: Sourcing Materials & Eq Repairs
Topic: Thread for pulleys
Replies: 13
Views: 3770

Re: Thread for pulleys

mazza,

Have had a look at their website. Did you buy the serabraid?? It looks like the thread we used to use and I'd be keen to buy some more. Could you please tell me what you paid for it??

Thank you

Robyn
by Robdean
05 Sep 2011, 15:07
Forum: Chemistry and Labware - General
Topic: Cleaning test tubes
Replies: 23
Views: 10348

Re: Cleaning test tubes

I find HCl works well getting rid of rust stains - just fill the tube to just above the stain with 4 - 6M HCl and leave for a couple of days in the fume cupboard (with a corrosive sign!!). Then wash as usual. I resuse the acid time and time again and it works every time! Have had the same bottle for...
by Robdean
24 Aug 2011, 08:35
Forum: Safety with Chemicals
Topic: ALERT Manganese Dioxide
Replies: 43
Views: 13114

Re: ALERT Manganese Dioxide

My CSIS is the same! p153 Manganese (IV)oxide (manganese dioxide) is listed as 7 -12, NR
by Robdean
24 Aug 2011, 08:32
Forum: Announcements
Topic: New Granddaughter
Replies: 5
Views: 2354

Re: New Granddaughter

That's very exciting news!! Congratulations to you all! :wub:
by Robdean
15 Aug 2011, 14:49
Forum: Jobs Forum
Topic: JOB ALLOCATION
Replies: 21
Views: 17082

Re: JOB ALLOCATION

I have 6 working labs too in 3 different buildings but also do TAS - adds up to a day (or more) but spread over the week - I do all the science + compile all the food orders, shopping, special orders for school functions and bookwork for TAS. I swear one day I'll take the hearts to TAS and the steak...
by Robdean
15 Aug 2011, 14:45
Forum: Safety with Chemicals
Topic: Lead class 9 how long????????????
Replies: 7
Views: 2260

Re: Lead class 9 how long????????????

These seem to change with the weather - we have no hope of keeping up to date with MSDS not to mention keeping the chem store in order!!
by Robdean
30 Jun 2011, 14:24
Forum: Safety with Chemicals
Topic: DG codes
Replies: 27
Views: 9474

Re: DG codes

Have just been updating the DG codes on our chemicals and notice that now Chemwatch has copper sulfate as 6 Toxic, and there are several new candidates for Class 9 Miscllaneous. Here I go again rearranging the shelves.
by Robdean
14 Jun 2011, 14:49
Forum: Forum Support Desk
Topic: Water bath
Replies: 15
Views: 13569

Re: Water bath

Interesting that you mention an aquarium heater Ian - what kind of temperature range do they have??
by Robdean
03 Jun 2011, 09:39
Forum: Safety with Chemicals
Topic: Chemical Safety Course
Replies: 5
Views: 2156

Re: Chemical Safety Course

I really think that the teachers should be doing the Chemical Safety courses as well - any course is directed at us and then there are certain teachers resist what you tell them what you have learnt.
by Robdean
30 May 2011, 15:02
Forum: Chemistry and Labware - General
Topic: Bromothymol blue
Replies: 17
Views: 6928

Re: Bromothymol blue

The posts on the bromothymol blue remind me of a “problem” we were having while back with our universal indicator. Despite my having checked the reaction, and finding that the results were the same despit the colour of the reagent, my teachers were throwing away bottles of universal whic...
by Robdean
24 May 2011, 10:07
Forum: Miscellaneous
Topic: Coal Seam Gas
Replies: 11
Views: 4497

Re: Coal Seam Gas

Yes it is very scary. They started drilling in the Keerrong Valley just shortly after we moved out (we didn't know it was about to happen either). In fact one of the presenters on that youtube video was a direct neighbour of ours. It's amazing that such a thing can occur without the consent of the l...
by Robdean
30 Mar 2011, 10:17
Forum: Safety with Chemicals
Topic: Glocves and Face Shields
Replies: 9
Views: 3252

Re: Glocves and Face Shields

So it seems I haven't been doing anything wrong! He said I could cause problems, for my Head Teacher and Principal by not doing the right thing! I take safety seriously and why would i jeopardise anyone's safety especially my own!!
by Robdean
29 Mar 2011, 12:47
Forum: Safety with Chemicals
Topic: Glocves and Face Shields
Replies: 9
Views: 3252

Glocves and Face Shields

Can I ask you good people what type of gloves you where when preparing acid solutions? I have been using nitrile gloves but a visiting OH&S “expert told me they are inadequate. I checked in CSIS and thee MSDS and still think they are OK. The MSDS say PVC initially but reading further down ...
by Robdean
23 Mar 2011, 13:37
Forum: Miscellaneous
Topic: Physical Phenomena Experiments - Science in a box
Replies: 73
Views: 22627

Re: Physical Phenomena Experiments - Science in a box

Hi Kin,

I'd love a copy too when you have time!!

Thanks in advance

Robyn

robyn.l.dean@det.nsw.edu.au
by Robdean
16 Feb 2011, 09:34
Forum: Chemistry and Labware - General
Topic: corn flour speaker monster
Replies: 3
Views: 2116

Re: corn flour speaker monster

I googled this yesterday as I'd never heard of it. There were several demonstrations and descriptions - watched a video of one - very entertaining! Have a look - there may be something of use to you.
by Robdean
16 Feb 2011, 09:24
Forum: Biology, Physics...
Topic: projectile launcher landing pad
Replies: 11
Views: 4474

Re: projectile launcher landing pad

I ended up buying the carbon paper from ebay for $17.55 / 100 sheets inc postage - a big difference from the $84 I found on 2 other sites. My HT and SAM were very happy with that. 100s sheets will see me out!! Thanks for the tip.