SPORTBIKERS CREED

"This is my BIKE. There are many like it, but this one is MINE. My Bike is
my best friend. It is my life. I MUST master it as I must Master my own
life. My bike, without me, is useless. Without my Bike, I am useless...I
must ride my bike true, I must ride better than the cager trying to kill me,
I WILL..." Huuurahh!

 

"Birdy" wrote

Keep taking the pills.

Theo

 

watched full metal jacket on the weekend maybe?

Jase

 

Polly's gone crackers!

 

just remember that siemen has a slight pH value, so
remember to wipe it off the fuel tank afterwards.

-f

 

Semen. Siemens is a large German company.
And 'has a slight pH value' is pretty much meaningless, I'm afraid.
Quit watching shampoo commercials.

Well, it _is_ Harsh Week.

-----sharks

 

Siemens is Swedish, but bfd.

 

An interesting point of view, boldly stated and with just a hint
of IRC-ism for piquancy.

But, sadly, wrong. German german german, in fact they're
quite possibly the most German thing on the planet. Try
working for them some time.

(although I'll admit that the BMW Funduro sounds like a
piece of outdoor furniture from IKEA ...)

-----sharks
http://www.siemens.com/index.jsp?sdc_p=t4cs6uo1032026pnflm&sdc_sid=19817213248&

 

"sharkey" wrote

ROTFL.

I saw one the other day that talked about negative and positive pH.
Huh? Helen didn't understand what I was laughing about.

Theo

 

If I flew someone down to Melbourne and stuffed them with
raw ground beef, I'd at least expect them to BE ABLE TO SPELL
THE COMPANY NAME AFTERWARDS!

-----sharks

 

Well they aren't any good for riding...

Aaron
ZX6R

 

Not compared to a ZX6R - I rode my brothers once before he sold it - wow!

I don't need to go that fast or horizontal, and I'm a big fat bastard, so
the Fat Boy suits me a lot more than a Ninja. To each their own, I say.

JP
2003 VN250 (stolen & found) --> 2003 FLSTFI (soon)

 

A physiology textbook informs me that the normal pH for semen is around 7.4,
with 7.1 to 8.0 defining the range for 'normal'. That makes it basic (ie.
alkaline). Blood is also slightly basic, around 7.2.

JP's post explains the rest of it pretty thoroughly. A side issue... a pH
above 7 indicates a negative voltage potential for hydrogen ions, and
although it should be properly referred to as pOH (potential for hydroxide
ions) no-one in medicine ever does. Dunno about the rest of the scientific
community.

 

Strictly speaking, it doesn't. Free oxygen rusts things. Rust is the result
of oxidation between iron and oxygen (4Fe and 6O^2 -> 2x Fe2O^3... it's a
bit more complicated than that...) The free oxygen is often in the water,
which means that water is not your friend. However slightly acidic water
acts as an electrolyte or conductor for the process. See
http://www.wikipedia.org/wiki/Rust for a thorough explanation. Salt water is
an even better electrolyte, hence iron near the sea rusts faster.

Pure water is completely neutral. However it is unlikely that you will ever
encounter pure water outside of a laboratory. Most rainwater is a dilute
solution of carbonic acid (water plus carbon dioxide), if not something
nastier. And even in pure water you will have localised regions of acidity
and alkalinity as a small number of water molecules disengage into H+ and
OH- ions.

No, as (in simple terms) the pH scale is a ratio of actual concentration to
maximum concentration (ie. 100% pure acid, nothing else).

0 pH is a concentration ratio of 1 to 10^0 (ie. 1 to 1)
1 pH is a concentration ratio of 1 to 10^1 (ie. 1 to 10)
2 pH is a concentration ratio of 1 to 10^2 (ie. 1 to 100)
3 pH is a concentration ratio of 1 to 10^3 (ie. 1 to 1000)
etc...

You can't have a higher ratio than 1 to 1, hence you can't get a pH less
than 0.

Toxicity and pH don't really relate at all. Toxicity refers to the ability
of a compound to disrupt physiology (usually meaning human physiology unless
specified otherwise).

Something with an extreme pH value (high or low) will obviously do that, but
something that is pH neutral (eg. plutonium, mercury, arsenic) is still
clearly highly toxic.

Interesting trivia: your stomach acid is created by cells called "oxyntic
cells". The process by which the lining of your stomach can survive the
incredibly acidic environment is well understood (there's a buffer zone of
hydroxide ions which line the stomach wall) . However it is not known how
the oxyntic cells actually survive producing the acid in the first place.

Manning - medical school dropout.

 

[snip - other questions covered more than adequately by Manning]

They don't - I just had a mental image of a chick with a large hole in the
back of her neck and toxic was the first word that came to mind for some
reason. Destructive would have been better.


JP
2003 VN250 (stolen & found) --> 2003 FLSTFI (soon)

 

Strictly speaking, it doesn't. Free oxygen rusts things. Rust is the result
of oxidation between iron and oxygen (4Fe and 6O^2 -> 2x Fe2O^3... it's a
bit more complicated than that...)[/QUOTE]

Heh heh heh - you're new here aren't you?

You sure you don't want to explain some _more_ chemistry to
Hamish?



big (tho maybe he's forgotten it all now he's a father...)

 

No, as (in simple terms) the pH scale is a ratio of actual concentration to
maximum concentration (ie. 100% pure acid, nothing else).

0 pH is a concentration ratio of 1 to 10^0 (ie. 1 to 1)
1 pH is a concentration ratio of 1 to 10^1 (ie. 1 to 10)
2 pH is a concentration ratio of 1 to 10^2 (ie. 1 to 100)
3 pH is a concentration ratio of 1 to 10^3 (ie. 1 to 1000)
etc...

You can't have a higher ratio than 1 to 1, hence you can't get a pH less
than 0.[/QUOTE]

Try telling that to the bookies at the local pony track...

big (Hey Hamish, hand me that bottle of "7:4 against" pH acid...)

 

On 30/7/03 11:34 PM, in article bg8hem$9sg$, "Manning"

So pure water can rust things? How do these things disengage? If water is
H20 and each H20 consists of H+ and OH- aren't the ratios the same, and
therefore the solution is still neutral? So where does this free oxygen
come from?

Salt water contains salt, does this operate on a different mechanism to free
oxygen?

Really? From what you have said above it is possible.
Doesn't the pH relate to the concentration of Hydrogen ions in solution?

How do you measure pH when above its all about aqueous things? Do you make
a solution of Arsenic and then measure it? Do you subtract the hydrogen
ions due to the water away or something? I don¹t understand.

Cheers

Hammo

 

On 31/7/03 12:05 PM, in article bg9tf9$3pq$, "Manning"

Is it possible for the oxygen to come from somewhere else? Can it then act
alongside the pure water?

I read something about hydrogen bonding, is that important?

In the hydrogen bonding bit I read about a dipole. That had something to do
with electricity.

Does oxygen have a pH? Just that if pure water contains no oxygen, and
non-pure water has dissolved oxygen in it, can the impurity be measured by
the pH of the solution?

So, if you had salty water, but no oxygen (so it wouldn't be pure water) you
wouldn't necessarily get rusting even though you had an electrolyte?

There was something about molarity I read. The higher this molarity, the
higher the number of a species that is present. I guess it would be like if
you dissolved sugar in a 2:1 ratio in water the molarity might be higher?

This equation kept popping up

PH = -log[H+], so would it be true?

Like if your concentration (they used a thing called moles/L-1) was say 6,
you get a negative number. There was something else about weak acids and
some equation, whay would this be different if the concentrations were the
same?

I have read somewhere that oxygen can be toxic if you have too much, and it
doesn't have a pH. But if it was liquid oxygen, it would be in solution, so
you could measure the pH, yeah? But then there is so reference to the
temperature of the solution, so the pH can be different even if the solution
has the same concentration? How can this be?

Why are you so miserable?

Hammo

 

So it's the oxygen in the water I drink causing my insides to rust, and
making my poop brown?