Search found 459 matches

by fibreweb
17 Feb 2014, 14:17
Forum: Sourcing Materials & Eq Repairs
Topic: Cotton covered wire
Replies: 11
Views: 2884

Cotton covered wire

We have used cotton covered wire for making electromagnets since I got here 15 years ago. Our supply of this wire which built up during the years when the schools were supplied with stuff based on their numbers is now just about used up and I am trying to locate more. I have looked at the Serrata, H...
by fibreweb
17 Feb 2014, 12:10
Forum: Miscellaneous
Topic: starch
Replies: 11
Views: 2552

Re: starch

I have used cornflour for the last 15 years and have had no problems. My method is to mix a little of the powder in water then add hot water and boil for a minute or 2 to "crack" the starch granule. If you don't boil it separates out. This give a whitish, viscous liquid that has the tendancy to stim...
by fibreweb
03 Feb 2014, 13:35
Forum: Recipes and Pracs
Topic: Enzyme Prac that allows for variables in temp, pH and substr
Replies: 15
Views: 4177

Re: Enzyme Prac that allows for variables in temp, pH and su

Spinach works beautifully for pH. We use HCl at 0.05M which has a pH of about 2.42, HCl at 0.01M pH 4.34, tap water pH 6.4, NaOH 0.01M pH 9.03 and NaOH 0.05M pH 11.9. I we found that a lot easier than trying to make the pH a specific figure as the basis of the experimint is to show the different rea...
by fibreweb
03 Feb 2014, 08:41
Forum: Recipes and Pracs
Topic: Enzyme Prac that allows for variables in temp, pH and substr
Replies: 15
Views: 4177

Re: Enzyme Prac that allows for variables in temp, pH and su

Blended green capsicum or silverbeet works beautifully also.

You then can work on all liquid measurements rather then hoping bits are cut the same size.

Also much nicer to clean up.
by fibreweb
12 Dec 2013, 08:25
Forum: Safety with Chemicals
Topic: Safety showers.
Replies: 24
Views: 5419

Re: Safety showers.

Don't you need a very low pressure with the eye wash as other wise it could cause damage to the eyes?

I am slack and have no regular schedule of checking the eyewash and safety showers apart from the end of year clean up and check on just about everything.
by fibreweb
06 Dec 2013, 11:58
Forum: The Lab Tech Position
Topic: Agriculture
Replies: 7
Views: 3779

Re: Agriculture

Here Ag is also attached to the Science Faculty with 3 teachers teaching both. We have an Ag assistant 3 days a week, who is as Dime mentioned, under different conditions pay and leave wise to us. I do some Ag photocopying and getting Science equipment for them when needed. This doesn't happen often...
by fibreweb
28 Nov 2013, 08:33
Forum: Miscellaneous
Topic: what couldn't you do without
Replies: 41
Views: 7943

Re: what couldn't you do without

Pyroneg is a specially formulated powder designed for cleaning glassware.
I have used it in the past and it works very well.
I now use napisan which also works very well and is cheaper and easier to obtain.
by fibreweb
25 Nov 2013, 14:20
Forum: Recipes and Pracs
Topic: Preserved specimens.
Replies: 35
Views: 7331

Re: Preserved specimens.

This problem was solved for me by arsonists! I had been deliberating what to do with them but it's not a course of action I would recommend! All my preserved specimens were kept in the prep room that was destroyed when the entire block was torched last year. I don't miss the calf foetus, snakes, car...
by fibreweb
21 Nov 2013, 09:03
Forum: Chemistry and Labware - General
Topic: STELR
Replies: 21
Views: 5749

Re: STELR renewable energy kits

Picking up a topic from 2 years ago. our school has just received our 10 STELR kits and I was wondering how other school who already have the kits store and use them. Basically have you left the kits in the original cardboard boxes that they came in and the whole box goes out to the students for the...
by fibreweb
20 Nov 2013, 12:03
Forum: Biology, Physics...
Topic: Biotechnology ideas
Replies: 6
Views: 2102

Re: Biotechnology ideas

Our year 10 students have to do an assessment task on this. They pick a biotechnology and do a written and then oral report. These are the guidelines thay can pick the technology from Transgenic Species The term Transgenic Species describes an animal or plant that has been genetically altered. Xenot...
by fibreweb
13 Nov 2013, 09:27
Forum: Chemistry and Labware - General
Topic: Physics equipment ID
Replies: 11
Views: 3060

Re: Physics equipment ID

img033.jpg Ours are still in the original box from way back when. This was the best explanation as to how they would have been used in the labs http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_nos_ps_8.pdf They have not been used in the 14 ye...
by fibreweb
08 Nov 2013, 10:10
Forum: Recipes and Pracs
Topic: National Curriculum
Replies: 19
Views: 4650

Re: National Curriculum

Talking about the how large the Core Science is made me think of Messell that those of us over a certain age had to lug around.
It was hard cover and had over 1,000 pages.
If you did 1st level Biology as well you also had "Web of Life" which had over 800 pages.
All this in your globite school case.
by fibreweb
05 Nov 2013, 12:33
Forum: Safety with Chemicals
Topic: Dophoterine
Replies: 2
Views: 1202

Dophoterine

Does anyone have or have heard of this chemical. My husband has recently started working as a maintenance electricial in a Lime mine. He has to have a container of this chemical on his belt at all time in case of the lime getting on his skin or more importantly in his eyes. I have Googled it and won...
by fibreweb
04 Nov 2013, 09:30
Forum: Announcements
Topic: Course for Lab techs in Saturday SMH
Replies: 9
Views: 2417

Re: Course for Lab techs in Saturday SMH

I don't know anything about a course advertised in the SMH. However I am at the moment doing a Certificate IV in laboratory techniques via Flexible delivery ( essentially online with a couple of weekend workshops through out the semesters ) through Armidale TAFE They are at the moment planning the c...
by fibreweb
29 Oct 2013, 11:09
Forum: Chemistry and Labware - General
Topic: voltameter
Replies: 3
Views: 1476

Re: voltameter

I use 1m sulphuric acid.
That way the I don't have to wait for the small amount of concentrated sulphuric acid to diffuse through the water.
by fibreweb
15 Oct 2013, 09:51
Forum: Chemistry and Labware - General
Topic: Hazardous products of reactions
Replies: 8
Views: 2952

Re: Hazardous products of reactions

Nitric acid and copper producing nitrogen dioxide. I discover this very early in my time as a labbie, not knowing any different pouring an "unknown" down the sink which happened to have some bits of copper lying in the bottom. Luckily it only produced a small very small amount of brown gas with no h...
by fibreweb
11 Sep 2013, 15:07
Forum: Safety with Chemicals
Topic: Nitric acid where do you store it?
Replies: 20
Views: 4818

Re: Nitric acid where do you store it?

Mine is also on the floor in the chemicals store room in a bucket, he is however accompanied by younger brother Nitric Acid 4M and baby brother Nitric Acid 1M.
It is not used much at all we have had the same bottle for the 14 years I have been here.
I do not have a corrosive cabinet
by fibreweb
05 Sep 2013, 14:40
Forum: Safety with Chemicals
Topic: mini or full MSDS's (sds's)
Replies: 16
Views: 4885

Re: mini or full MSDS's (sds's)

I am at a Government school and only have Mini SDS. This is a choice made on the photocopying and paper use. I have 368 chemicals. Mini sds + 368 sheets of paper at 0.02 cents a copy = $ 7.36 and fille 3 large A4 binders. Full SDS at 10-17 sheets per chemical= 3,500 -6,200 sheets = well over $100 fo...
by fibreweb
23 Aug 2013, 09:45
Forum: Miscellaneous
Topic: Rock supplies
Replies: 9
Views: 2318

Re: Rock supplies

If I am allowed to say so I get my rock specimins from Serrata.
They come in packs of 10 are around 3-4cm in size. Cost varies according to the specinim but the bags are generally around $20.
They have over 40 different Minerals, 16 odd igneous, 11 metamoprhic and 12 sedimentary.
by fibreweb
16 Aug 2013, 10:09
Forum: Chemistry and Labware - General
Topic: cleaning the science labs
Replies: 24
Views: 5447

Re: cleaning the science labs

I go around most Thursday afternoon's during sport to make sure the labs are stocked with handtowel, soap and that the class sets of test tubes, beakers, glue ,calculators etc. are there. Just as it is not my job to pick up my husbands' or sons' dirty clothes, I do not consider it is my job to clean...