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Making Colloidal gold
Here is a write up I presented on making colloidal gold. It was done so my kids could do some nanote ... |
24-1-2016 at 16:48
by: Harristotle |
weight of gold leaf from thailand
Yes Philou, but no. I don't believe you.
So this calls for an experiment to test the idea.
The a ... |
24-1-2016 at 16:40
by: Harristotle |
gold leaf tests - or beware Thailand
Hi to all.
I have been having difficulty with my Thai gold leaf dissintegrating when electrolysed, ... |
24-1-2016 at 01:04
by: Harristotle |
ebay seller decommissioning a lab
I reckon he's got tickets on himself.
While what he has got compares well with list prices, facto ... |
10-1-2016 at 06:09
by: Harristotle |
miniture neon lamps
Hi J_sum1,
they should work, but use a big resistor 20kohm or better.
Or if you are truly cheap, ... |
6-1-2016 at 21:04
by: Harristotle |
A New Name
[rquote=431891&tid=64712&author=diddi]it will be Vc for me jsum! lucky it is not WC  [/rqu ... |
19-12-2015 at 07:07
by: Harristotle |
miniture neon lamps
Ah neon lamps, I love 'em.
Great for calibrating spectroscopes,
they have teeny amount of thoriu ... |
6-12-2015 at 06:36
by: Harristotle |
Walter White goes Walkabout?
You are right.
The socioeconomics for teachers really make it a profession for the downwardly mobil ... |
13-10-2015 at 04:22
by: Harristotle |
Sodium metabisulfite - this stuff is nasty!
SO2 forms adducts with proteins, including but not limited to with cysteine residues.
That is not ... |
22-9-2015 at 02:58
by: Harristotle |
one last trick
one last qute trick that I normally use, but for some reason did not put in that example: you can in ... |
2-9-2015 at 01:14
by: Harristotle |
NTC Thermistor and Arduino brief tutorial
There is an even cheaper way to do this. A silicon diode has a negative temperature coefficient of a ... |
1-9-2015 at 02:13
by: Harristotle |
microfluidics
That is a good idea Smaerd.
I quite like the approach of drawing the design in inkscape or some s ... |
1-6-2015 at 04:39
by: Harristotle |
9v anti static gun
The problem as I understand with records and static is this:
a charged dust particle sticks to th ... |
29-4-2015 at 03:52
by: Harristotle |
Anti static gun, or chemical
Hi all.
It occurs to me that, as dust is being held onto vinyl electrostatically, making a solution ... |
28-4-2015 at 05:55
by: Harristotle |
low-powered Plasma discharge, for surface-interaction
Well, a frustrating weekend.
Increasing the velocity of the air leaving the exit hole (until it ble ... |
2-11-2014 at 04:54
by: Harristotle |
Constructing a low power plasma discharge
Greetings all.
I have had a go at making one of these. Here is my write up. Please note that this d ... |
27-10-2014 at 04:35
by: Harristotle |
low-powered Plasma discharge, for surface-interaction
Hey Chief3.
Try 10pcs Small 0.5mm PCB Drill Mini Press HSS Electrical Twist Drilling
http://www. ... |
14-10-2014 at 20:57
by: Harristotle |
GC and Raman
The last teaching week for the year ended last friday.
Both the GC and the Raman are in my plans fo ... |
19-12-2013 at 05:05
by: Harristotle |
El-cheapo xray gas scintillation probe - in a paint can
HammerOfLight: oh wow! You bring back fond memories.
I made my poor students in 2009 do this!
... |
11-10-2013 at 02:31
by: Harristotle |
Polyacrylate as alternative dessicant?
It is quite good for concentrating proteins with.
Fill a dialysis bag with your desired protein and ... |
18-9-2013 at 02:54
by: Harristotle |
calcium stearate removal
Really Nicodem ?
Don't you think that crossfertilisation is good? It may even improve the standin ... |
6-9-2013 at 03:36
by: Harristotle |
Super Capacitors
I can vouch for this guy - my two arrived today.
I am very happy with these -they look awesome, a ... |
15-8-2013 at 02:28
by: Harristotle |
Cheap, Low-Resolution, Raman Spectroscopy
Hi Radagast,
Here are the eagle files that I have been working on.
They are based on the referen ... |
2-8-2013 at 22:24
by: Harristotle |
Cheap, Low-Resolution, Raman Spectroscopy
Hi Radagast,
one thing to check is the serial connection setup
find the line Serial.begin(.
C ... |
29-7-2013 at 04:18
by: Harristotle |
Build your own Gas Chromatograph
Do you really think so Mildronate?
injector=septum(replaceable), port and microswitch.
Push your ... |
24-5-2013 at 01:43
by: Harristotle |
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