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DIY Sub Zero C freezer?
That is true in the short term however, having installed wind turbines from a few KW to over a MW, t ... |
30-5-2008 at 20:31
by: bio2 |
Gigantic Test Tubes
Combustion tubes with thick walls perhaps. A version of those have a constriction at the top for fla ... |
26-5-2008 at 20:13
by: bio2 |
vacuum system controlled leak or control
Read up bubbha, this is very simple!
You are asking questions that you already have the answer fo ... |
26-5-2008 at 20:09
by: bio2 |
vacuum system controlled leak or control
Those vacuum nomographs are only an approximation. Your idea would work but
you need to use an actu ... |
25-5-2008 at 09:49
by: bio2 |
Aspirator Recomendations
Good grief!
Check for leaks and make sure the correct end is hooked up. |
24-5-2008 at 20:31
by: bio2 |
motor for fumehood
A bilge fan or pump will have the DC (duty cycle) on the motor nameplate.
These are typically ava ... |
24-5-2008 at 10:38
by: bio2 |
Boric acid as a pesticide
That was the strongest I found that roaches would still eat. Five percent also worked.
For ants I ... |
23-5-2008 at 16:30
by: bio2 |
vacuum system controlled leak or control
A 1 liter flat bottom boiling flask will take full vacuum with no problem up to 250+ degrees. |
23-5-2008 at 08:22
by: bio2 |
Boric acid as a pesticide
It should work if enough can be soaked into the wood and the insects eat it.
Sodium Borate is als ... |
22-5-2008 at 16:44
by: bio2 |
Boric acid as a pesticide
Apparently what actually happens is the roaches slowly die of dehydration as the
boric acid crystal ... |
22-5-2008 at 12:12
by: bio2 |
Suggestions for oil-bath oil?
SC Wack is right!
Any of you guys using mineral oil at 200 degrees?
I tried it once years ago ... |
19-5-2008 at 13:00
by: bio2 |
Suggestions for oil-bath oil?
Best heating oil for me is that hard, hydrogenated, solid frying "lard" mixture sold unrefrigerated ... |
18-5-2008 at 11:19
by: bio2 |
Vacuum From Peristaltic Pumps
Nalgene tubing recommended for peristaltic pumps. Couldn't find a vacuum rating for this.
....... ... |
18-5-2008 at 11:05
by: bio2 |
Magnetic stirrer/hotplate
Put the heating element in the oil controlled by a dimmer.
Easy temp control and way less heat in ... |
18-5-2008 at 10:23
by: bio2 |
2 stroke crankshaft vs 4 stroke crankshaft
Some Suzuki and Honda 4 strokes use ball bearing cranks.
Plain bearings are much quieter and don' ... |
15-5-2008 at 09:29
by: bio2 |
Unified Copper Process
........2CuCl2(aq) + SO2 + 2H2O --> 2CuCl + 2HCl(aq) + H2SO4(aq)................
Using only 2 ... |
14-5-2008 at 12:55
by: bio2 |
build your own refrigerator
Peltiers are super inefficient but if this is no concern your
idea sounds feasible.
8-10 picnic ... |
12-5-2008 at 16:53
by: bio2 |
Powdered Zinc Question
.........I am not sure if this is because it is drying out, too fine, or I missed something......... ... |
9-5-2008 at 17:34
by: bio2 |
Vacuum grease substitute?
The thin white PTFE tape comes in many qualities and some will
not stretch evenly and is not soft l ... |
8-5-2008 at 18:04
by: bio2 |
Vacuum grease substitute?
The thin white PTFE tape is better for ground glass joints.
The yellow is for gas lines and is mu ... |
8-5-2008 at 13:45
by: bio2 |
Simple math computation check
Perform a density test or guess as woelen suggested.
1.05 to1.1 seems about right.
Oral soluti ... |
8-5-2008 at 13:41
by: bio2 |
Vacuum grease substitute?
Some of it is a good substitute.
Not the thin stuff as it melts too low. It needs to be thick, n ... |
8-5-2008 at 13:02
by: bio2 |
Performic in SS or PP/PE vessel?
Glass transition temperature of plastics is the indefinite melting point. |
2-5-2008 at 19:50
by: bio2 |
Performic in SS or PP/PE vessel?
316L will suffice. Peracetic has little effect on 18/18 SS. Formic acid itself will even eat Ni.
... |
2-5-2008 at 18:55
by: bio2 |
What size beads to use in a Hempel column?
evil_lurker , in the USA, check Harrington Industrial Plastics for PTFE, PFA & FEP tubing in sto ... |
28-4-2008 at 17:23
by: bio2 |
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