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distilled water for diy ph calibration solution ?
potassium hydrogen tartrate is a NIST primary pH standard.

Buy yourself some cream of tartar, mix ...
1-4-2019 at 05:43
by: Harristotle
Culturing of a red flourecent bacteria/algae
Chlorophyll glows red under uv light. Try pointing a 405nm uv laser at a plant, or better, an alga. ...
8-3-2019 at 07:04
by: Harristotle
New element in the collection: Zr
Ubya, it depend how much of the "trace" of Zr 93 is present. That has a half life of 1.5 million yea ...
29-10-2018 at 05:40
by: Harristotle
New element in the collection: Zr
One of Zr isotopes is a beta emitter. You can buy zirconium welding rods, if I recall correctly.

...
26-10-2018 at 04:52
by: Harristotle
Preparation of magnesium silicate and/or activated alumina (and others) for chromatograpy
I used regular talcum powder, non-scented, purchased from a woodworking shop.

I gave it a wash in ...
13-9-2018 at 04:22
by: Harristotle
Paper Centrifuge
It peaks at 10s of thousands of RPM. It isn't continuous, by any stretch of the imagination.

But ...
27-8-2018 at 02:47
by: Harristotle
Paper Centrifuge
Further thought:
The DNA you isolated has lots of proteins associated with it.

Perhaps, once you ...
27-8-2018 at 02:11
by: Harristotle
Paper Centrifuge
Don't worry Sulaiman.
Mass is very low.

Tape 3 bits of velcro to the card you are spinning, and ...
27-8-2018 at 02:04
by: Harristotle
Cheap radioisotope sources
I'm not quite sure that I agree, Sulaiman.

One place I would really like to see looked at is bioa ...
21-7-2018 at 03:32
by: Harristotle
Silica doped paper chromatograhy
Thanks for this, it is a superb idea.

19-7-2018 at 05:37
by: Harristotle
Is it possible to make a mammalian cell culture lab at home without breaking the bank? + 3 other questions
Hi. I used bicarbonate/citrate (ENO) in dishes to culture fish cells at low temperature, a long time ...
5-7-2018 at 19:17
by: Harristotle
Dung bitumen
I think that this is what you are looking at:

https://www.flickr.com/photos/centralaustralia/8419 ...
4-6-2018 at 03:47
by: Harristotle
Dung bitumen
You may also have come across an old Stick Nest rat nest (Leporillus conditor). They used to produce ...
1-6-2018 at 17:19
by: Harristotle
Radiation detector for minerals on a budget
Well, I wrote one for an arduino a long while ago.

I ran the arduino off a 9 volt battery, and ca ...
17-5-2018 at 03:29
by: Harristotle
Radiation detector for minerals on a budget
Most alpha emitters are not pure alpha emitters - they undergo secondary gamma emission as the k she ...
17-5-2018 at 01:42
by: Harristotle
How to trigger reaction in closed vacuum jar ?
See diagram.

Basically use glass bottle with septum made from icecream lid. Tilt to mix. Tape to ...
15-3-2018 at 04:52
by: Harristotle
Doable synthesis of F2 in amateur setting?
Tsjerk - The Odin sells fixed increment (not "analogue") pipettes for around $25 USD. They are quite ...
5-2-2018 at 03:39
by: Harristotle
Bacteria suggestion for feeding
There are a couple of ways to try this:

1) Could you feed them on freeze-dried bakers yeast? No c ...
27-1-2018 at 23:01
by: Harristotle
Bacteria suggestion for feeding
Can you not use something like a lactobacillus from yoghurt or kefir?

That is pretty much jam jar ...
27-1-2018 at 03:35
by: Harristotle
Mystery Glassware Identification Thread
It is a chromatography column, made by Pharmacia
Often filled with Sephadex/Sephacryl size exclusio ...
8-1-2018 at 00:04
by: Harristotle
Synthego offers FREE samples of CRISPR for human cells lines
Thanks for sharing,
passed on to some bio mates, who became very excited.

Cheers,
H.
7-1-2018 at 14:22
by: Harristotle
Is this a good Geiger counter cicuit?
You remind me of a 1000 volt circuit I was making for a photomultiplier tube, a while ago.

I disc ...
1-1-2018 at 06:03
by: Harristotle
Preparation of TLC Plates and quantitative analysis of paracetamol
Greetings to all.
The following is a summary of a technique that I have used to prepare silica-base ...
20-12-2017 at 06:44
by: Harristotle
Magnetic stirrer hotplate free to a good home
Drain Cleaner H[sub]2[/sub]SO[sub]4[/sub] is almost impossible. I have seen it at Masters before the ...
18-12-2017 at 21:10
by: Harristotle
Magnetic stirrer hotplate free to a good home
Nice job. Are you close to 100ml yet?

It seems you are getting close to nailing it.

Cheers,
H ...
16-12-2017 at 05:21
by: Harristotle
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