Electric

[Joe]

I would like to know if LED's light can create algae? Does the light
Freq. create eviroment that would grow algae? It's for a seal system
using Distilled Water.

 

[Guy Macon]

Joe wrote:

I would like to know if LED's light can create algae? Does the light
Freq. create eviroment that would grow algae? It's for a seal system
using Distilled Water.

May I assume that you don't want *anything* growing in your water
not just a lack of algae? The reason I ask is because you *will*
have things growing in your water even if it is in total darkness.

 

[John Popelish]

Joe wrote:

I would like to know if LED's light can create algae? Does the light
Freq. create eviroment that would grow algae? It's for a seal system
using Distilled Water.

The chlorophyll in plants can absorb useful energy from red and blue
wavelengths.
If your LEDs produce light in either or both of these absorption
bands, they may support the growth of algae.
http://www.chm.bris.ac.uk/motm/chlorophyll/chlorophyll_h.htm
--
John Popelish

 

[John Woodgate]

I read in sci.electronics.design that Mac <foo@bar.net> wrote (in
<pan.2005.01.16.18.13.33.201981@bar.net&gt about 'Electric', on Sun, 16
Jan 2005:

Also, algae (and other photosynthetic aquatic organisms) need minerals
to grow, not just water, air, and light.

We just had a thread here with reports of stuff growing in ultra-pure
water (not to mention the mercuric chloride solution!).
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

 

[gmv]

"Joe" <cjohnson@waterfx.com> wrote in message news:1105866586.958429.211160@f14g2000cwb.googlegroups.com...

I would like to know if LED's light can create algae?

No, Algae has to be already present through some kind of contamination.

Does the light
Freq. create eviroment that would grow algae?

I would think the frequency of the light needs to be
suitable for photosynthesis in order to foster
any kind of plant growth.

It's for a seal system
using Distilled Water.

Distilled water has high electrical resistence adding
anything such as chlorine bleach to the water will
destroy this resistance. But if that resistance is unimportant
I would recommend putting three drops of Chlorox at full strength
to one gallon of water given each drop is 1/20 of a ml.
I think it is impossible for a common person to avoid
contamination of distilled water when making anything
so if you are worried about the growth of stuff you
will need that chlorine added. Unless of course the project
will operate for only a short time.
I understand in a closed system like a nuclear reactor
strange chemicals will spontainiously appear to contaminate
the primary system just from radiation alone.

I'm Not an expert,
gmv

 

[Guy Macon]

Mac wrote:

Seriously, though, many years ago, a French scientist by the name of
Pasteur showed very convincingly that life cannot be created from
inanimate matter. Since then, all scientists (AFAIK) have believed this to
be true. So I don't think that LED's can create living algae in distilled
(and therefore sterile) water.

There is a good reason why so many thought that life *can* be
created from inanimate matter; it is almost impossible to keep
that first living thing out of a system, thus making it appear
as if life can be created from inanimate matter

If you have ever worked with ultrapure water systems you will have
experienced opening up a system that is supposed to be pure H2O
and having black or green ooze come out instead.

Also, algae (and other photosynthetic aquatic organisms) need
minerals to grow, not just water, air, and light.

Good luck keeping *all* minerals away from the little buggies.
I have seen filamentary bacteria growing in distilled water
in a sealed polypropylene container.

 

[Guy Macon]

Mac wrote:

Well, sterile water won't have anything growing in it, even if it is in
full tropical sunshine. It's all about how carefully sterility is
maintained. The OP didn't claim sterility, but if it is distilled, it
should be close.

"Close" applies to hand grenades, horeshoes, and atomic bombs.
"Close" inn't good enough to maintain sterility.

Also, if there is close to zero mineral and organic content in the water
(which should be the case for distilled water) then any organisms which do
find their way into the water will be nutrient-limited and will not
increase much in numbers.

I suggest that you get some distilled water, expose it to ordinrary
air, and wait a few months. Do that and your opinion about how well
limiting mineral and organic content in the water works to supress
bacterial growth will no doubt change. It sounds great in theory
but in the real world you get slimed.

 

[Guy Macon]

John Woodgate wrote:

We just had a thread here with reports of stuff growing in ultra-pure
water

In that thread we had a poster who refused to believe that ultrapure
water won't stay ultrapure when exposed to the internals of typical
electrical equipment. What ever happed to "do the experiment yourself
and see what happens?" A jug of distilled water from the supermaket
poured into a stainless steel bowl and covered with a loos-fitting
lid will show the folly of thinking that the bugs won't grow.

 

[Mac]

On Mon, 17 Jan 2005 04:43:20 +0000, Rich Grise wrote:

On Mon, 17 Jan 2005 01:14:35 +0000, Mac wrote:

On Sun, 16 Jan 2005 20:44:22 +0000, Guy Macon wrote:

Mac wrote:

Well, sterile water won't have anything growing in it, even if it is in
full tropical sunshine. It's all about how carefully sterility is
maintained. The OP didn't claim sterility, but if it is distilled, it
should be close.

"Close" applies to hand grenades, horeshoes, and atomic bombs.
"Close" inn't good enough to maintain sterility.

Also, if there is close to zero mineral and organic content in the water
(which should be the case for distilled water) then any organisms which do
find their way into the water will be nutrient-limited and will not
increase much in numbers.

I suggest that you get some distilled water, expose it to ordinrary
air, and wait a few months. Do that and your opinion about how well
limiting mineral and organic content in the water works to supress
bacterial growth will no doubt change. It sounds great in theory
but in the real world you get slimed.

Obviously, it can't be considered sterile or even distilled, really, if it
is exposed to air for a few months. Dust motes and biological spores in
the millions will accumulate in such water. At which point, it will
certainly support growth of some kind.

I'd think that if it's "exposed to air for a few months", I'd expect it to
all evaporate. I thought he meant, expose it to air, then cover it, and in
two months, it will stink. ;-)

You know, I might just do this. I'll buy some distilled water from the
store, boil it, let it cool in the pot with the top still on, then open it
for 5 minutes and transfer to a mason jar and cover it with cellophane and
let it sit for 90 days to see what happens.

I'll rinse the mason jar out with tap water before I start. Then I'll
rinse it again a three times with the boiled distilled water before I add
the final batch of distilled water.

I'll leave the covered mason jar on a counter in my kitchen.

After 90 days, I don't expect obvious signs of growth.

And I tend to agree. But that wasn't really the point of the OP, was it?

Who knows what the point was of the OP.

Cheers!
Rich

 

[Mac]

On Sun, 16 Jan 2005 09:28:25 +0000, Guy Macon wrote:

Joe wrote:

I would like to know if LED's light can create algae? Does the light
Freq. create eviroment that would grow algae? It's for a seal system
using Distilled Water.

May I assume that you don't want *anything* growing in your water
not just a lack of algae? The reason I ask is because you *will*
have things growing in your water even if it is in total darkness.

Well, sterile water won't have anything growing in it, even if it is in
full tropical sunshine. It's all about how carefully sterility is
maintained. The OP didn't claim sterility, but if it is distilled, it
should be close.

Also, if there is close to zero mineral and organic content in the water
(which should be the case for distilled water) then any organisms which do
find their way into the water will be nutrient-limited and will not
increase much in numbers.

--Mac

 

[Mac]

On Sun, 16 Jan 2005 20:44:22 +0000, Guy Macon wrote:

Mac wrote:

Well, sterile water won't have anything growing in it, even if it is in
full tropical sunshine. It's all about how carefully sterility is
maintained. The OP didn't claim sterility, but if it is distilled, it
should be close.

"Close" applies to hand grenades, horeshoes, and atomic bombs.
"Close" inn't good enough to maintain sterility.

Also, if there is close to zero mineral and organic content in the water
(which should be the case for distilled water) then any organisms which do
find their way into the water will be nutrient-limited and will not
increase much in numbers.

I suggest that you get some distilled water, expose it to ordinrary
air, and wait a few months. Do that and your opinion about how well
limiting mineral and organic content in the water works to supress
bacterial growth will no doubt change. It sounds great in theory
but in the real world you get slimed.

Obviously, it can't be considered sterile or even distilled, really, if it
is exposed to air for a few months. Dust motes and biological spores in
the millions will accumulate in such water. At which point, it will
certainly support growth of some kind.

As I said, it is all about how carefully sterility is maintained.

And the OP did contain the word "seal," so there is some possibility that
the water is protected from exposure to ordinary air.

--Mac