## Search found 61 matches

04 Aug 2020, 12:52
Forum: Recipes and Pracs
Topic: iron standard solutions
Replies: 6
Views: 454

### Re: iron standard solutions

Oh yes! My mistake. It should be 0.0050 x 5, not 500. Thank you, Wayne. That'll teach me for doing calculations first thing in the morning.
04 Aug 2020, 08:02
Forum: Recipes and Pracs
Topic: iron standard solutions
Replies: 6
Views: 454

### Re: iron standard solutions

Hi Kathryn. I think you work this out as follows. I will assume the percentage is weight of solute/weight of solution. Start with your desired volume of solution. If you need 500mL of each, for example, each solution will weigh 500g. Then multiply the weight of the solution by the percentage require...
22 Jul 2020, 08:30
Forum: Biology, Physics...
Topic: sterilising and stench
Replies: 6
Views: 1010

### Re: sterilising and stench

Hi Beaker. This is normal. When I sterilise agar plates in the pressure cooker, I don't use a bag and the plates turn into a sodden, twisted mass of plastic and melted agar, and I've never experienced issues with getting gunk through the cooker valves. (Love your name, by the way. I used to watch th...
02 Jul 2020, 12:04
Forum: Sourcing Materials & Eq Repairs
Topic: Plastic trays
Replies: 9
Views: 1079

### Re: Plastic trays

Link to some photography trays (Australian company too) https://www.photoresource.com.au/DARKRO ... s/2210.htm
25 Jun 2020, 12:51
Forum: Recipes and Pracs
Topic: Potassium Iodide
Replies: 6
Views: 756

### Re: Potassium Iodide

Hi Helen. I've got saturated KI in the chem store, which is quite yellow, and some 1M, which is clear. So your 2M stuff should probably be clear.
24 Jun 2020, 09:39
Forum: Chemistry and Labware - General
Topic: Cleaning carbon rods
Replies: 5
Views: 1118

### Re: Cleaning carbon rods

Ha! Brilliant, bigmack. I knew there had to be a way.
24 Jun 2020, 09:17
Forum: Biology, Physics...
Topic: Safe disposal of Pasteur's experiment flasks
Replies: 2
Views: 761

### Re: Safe disposal of Pasteur's experiment flasks

That's excellent, bigmack, THANKS!
23 Jun 2020, 12:12
Forum: Biology, Physics...
Topic: Safe disposal of Pasteur's experiment flasks
Replies: 2
Views: 761

### Safe disposal of Pasteur's experiment flasks

Any ideas on how to make it safe for me to open the flasks after this experiment? Previously I've thoughtlessly opened the flasks without doing anything to kill the microbes. The flasks are too big to fit in the pressure cooker and i guess i'll just put them in a water bath and boil them, unless any...
23 Jun 2020, 11:50
Forum: Chemistry and Labware - General
Topic: Cleaning carbon rods
Replies: 5
Views: 1118

### Re: Cleaning carbon rods

Thank you both.
23 Jun 2020, 10:25
Forum: Recipes and Pracs
Topic: Esters
Replies: 7
Views: 782

### Re: Esters

17 Jun 2020, 09:19
Forum: Chemistry and Labware - General
Topic: Cleaning carbon rods
Replies: 5
Views: 1118

### Cleaning carbon rods

Does anyone know a quick way to clean copper deposits off carbon rods? I've been using sandpaper and it's messy and tedious.
16 Jun 2020, 10:57
Forum: Biology, Physics...
Topic: sterilising and stench
Replies: 6
Views: 1010

### Re: sterilising and stench

The stench - what does it smell like?
16 Jun 2020, 10:22
Forum: Safety with Chemicals
Topic: Congo red indicator
Replies: 1
Views: 1419

### Congo red indicator

I was doing a bit of research on Congo red because I'm updating a few labels. Found this - "However, the use of Congo red has long been abandoned, primarily because of its carcinogenic properties. Wikipedia". And this - "Congo Red is an azo dye, it is toxic to many organisms and is a suspected carci...
04 Jun 2020, 10:27
Forum: The Lab Tech Position
Topic: What is the name of your roles
Replies: 14
Views: 3045

### Re: What is the name of your roles

Here in NSW, the department of education calls the role "science assistant".
20 May 2020, 12:56
Forum: Chemistry and Labware - General
Topic: Microbiology
Replies: 9
Views: 2133

### Re: Microbiology

We're still doing it too. As usual, don't open the plates!