DrP

I once wrote a technical document for a solar water heating company who did not have any great English speakers (they were from India). They used squashed or flattened copper pipes painted black. (copper for the heat transfer, flattened to give more surface area of the pipe to face the more perpendicular incident sun rays, painted black for obvious reasons). I 'think' (it was a long time ago) that they used a glass pane in a frame to cover the pipes to stop wind cooling, although I am not sure as it was over 15 years ago.

Yea - go see the doctor and see what he says about it.

I would say it would probably be 2,4,6. That would be the most favoured sterically I would have thought..... You'd better look it up though or get confirmation as I am speculating here. Maybe you get the 2,4,6 as the most common, but then other configuration at much lower percentages.. ??

lol - thanks. Made myself giggle too with that one. ;-)

Crystal structures? Macromolecular, but not really polymeric. (Sorry John, you maybe covered that with diamond already - was just thinking about crystals, remembered this thread and decided to log on).

QUOTE: "Hydrogen bonding enables water to dissolve many organic biomolecules that contain functional groups which participate in Hydrogen bonding." I'm not a fan of this sentence... although kinda true I would say it was because the water molecules are polar... it is a solvent to these molecules because it is polar... the Hydrogen bonding is a side effect of the water molecule being polar and the high electronegativity of the Oxygen and the tiny unshielded H atoms. Saying it is a solvent BECAUSE it forms hydrogen bonds doesn't sit right on my tongue. I could be wrong about the semantics, I do not know - please correct me if I am wrong.

2 Hearts! Imagine how intelligent he would be!! ;-)

I don't think you can class the lower molecular weight dendrimers as polymers. http://en.wikipedia.org/wiki/Dendrimer Lipids definitely. What about Gels? Not sure you can call all gels polymers.... but they are essential one giant molecule filling the volume of their mass, like the amorphous solids... so definitely macromolecules.

Dendremers? Some large biological molecules and systems maybe? Some amorphous solids, if you don't class them as polymers already that is. What do you think? I'd have to look it up to be more certain I think as it has been a while

Those statements, 1 to 4, are correct. What else do you need to know?

Thanks - yea, sorry I think you are right stud.... it was probably that which I was measuring (or trying to) as the lolly pop sticks were glued together and then pulled apart so that they would slip over each other... it did not matter too much as I just wanted something reproducible that would allow me to compare different but similar samples. I think the machine was originally used for paper strength tests, so was no where near spec for my joint strength tests. If it wasn't such an antique (and if I actually owned it - lol) I would offer to send it to the OP to do some tests with - it should be much better for tissue then sticks... closer to what it was spec'd for. Alas, it is so old I am not sure it would be of use to anyone who wasn't the most patient of folks... I recon you'd have to do dozens of tests and ignore half of them and average out the rest due to the inconsistency of the machine.

Yea - How long is a piece of string? I think you'd need to do some actual measurements of the tensile strength of the tissue with a tensiometer. Simply trying to work out the strength of the tissue based on knowing that it is a cellulose fibre is not practical.... for example... how thick is the tissue? Tissue thickness will be in direct correlation to tensile strength. There will also be other factors effecting this such as how wet? Completely saturated or just dampened? See? If you have some base starting values that you actually know, then you will be able to work out/extrapolate for other situations and polymer loading... but you need something to start with, like actual tensile values of the paper with and without resin would be a start. Good luck - let us know how you get on. I wanted to try testing the tensile strength of an adhesive we make a few years back - the QC has always just been a simple 'stick together then try to break it' test. I thought I could do some formulation tweaks to improve the adhesive strength (and make the product cheaper if poss) if I could get actual values for the strength of the joints made with slightly differing formulations. I did not want to buy a brand new modern tensiometer.... I got a very old second hand one for a couple of hundred quid. It was for paper really, but I thought I could stick lolly pop sticks together with a measured amount of glue and break the joint in the machine to get a reading... it was a good idea, but the machine was SO old (antique really lol) it had a spring back mechanism and a dial to read off the values... as it was my glue was too tough to break in the machine (The sticks tore before the glue) so it did not work, but only cost me peanuts compared to the thousands it would have cost for a new machine..... Long story short... my mates were quite impressed and a little envious that I was 'testing the strength of joints' all week at work. ;-)

Do you have a tensiometer or are you planning to due some sort of crude snap back tests? I'd vary the resin loading from 0 to 0.2% in 0.01% increments and plot tensile strength vs resin loading. The graph should give you some good information. What is it you are trying to find out exactly?

Sorry - ignore this post

I think you are right imat... if he is a Hatter then he must be a maker of hats... and of course, the price tag gives it away too. Acme - not sure you'd need the confined space as it is in the hat and can be absorbed. Again, I have no reference, but have always believed it was absorbed through the skin on the head... This could be yet another one of those cases where what they taught you at school was a load of cobblers. lol.

The hat wearers definately went mad... The Mad Hatter from Alice in Wonderland is mad because of his hat... he is a wearer not a maker. Q: From which writer does mercury come from? A: HG Wells. I don't have a reference Acme (apart from Alice)... it is what we were taught at school... I will look into it... although short of searching the internet I'm sure whrere else to look. Yea - some places it suggests just the Hatters... others seem it could be the wearers too... I would imagine it was mainly the HAtters and then the odd fop who wore his hat too often. I will look into it more when I get home from work - I am supposed to be replying to someone else in another thread too, but haven't got round to that for a couple of weeks, so I'm not sure when I'll get round to it - if you find anything definitive before me then let us know!

The reason it stays in a ball on your hand and doesn't 'wet' your skin is due to it's very high surface tension. It is still not considered 'safe' to do so as atomic amounts are absorbed through the skin... and I think it is an accumulative poison that drives you insane.... thus the 'mad hatters', who used to wear top hats that were lined with mercury (or a compound thereof)... they absorbed traces into their heads and went mad.

This REACH registration of chemicals in the EU is a F+*&(ing con! I said it would be trouble when it first came out. We have used, safely, for many years a chemical in one of our formulations and it is very important to us.... Because it is a chemical not widely used by anyone, except us, the manufacturers are not going to bother paying the £10K REACH registration fee for the chemical and have decided to pull it from the market. It is bloody stupid that we have COSHH in place to make sure the chemical hazards are known and safety protocol is adhered too, we have MSDS's to outline the hazards clearly and to advise on clean up/contamination... the only reason I can see to be made to pay £10K to REACH register is to make money for some f*)(ing con man in the EU who is getting rich by pulling the wool over some idiots eyes by insisting that companies need to register chemicals they use. What a complete con! Rant over... Can ANYONE AT ALL tell me why we actually need the REACH registration system other than to fleece companies of a bit more cash for the EU? F*)(ing despicable! Hmm - Sorry - I was quite angry when I wrote this earlier. :-/

Back in the 90's, when I was doing a lot of long distance running and speed rep training for cross country, I would wake in the morning with a heart rate of 38 to 42.... I then put on a heart rate monitor to see how high I could get it to go doing hill reps (sprinting up a steep hill... and jogging back down it to rest before going again).. I got up to about 235/240 odd. I think I'd drop dead if it hit 240 at my current fitness level..lol.

Hi Swansont - sorry - I do not know the answer to your questions.. But the 'break even' mark was always considered the holy grail for fusion... it happened without much fuss or report about 20 years ago (princess Dianna died, which overshadowed everything else that happened and was news worthy)... presumably with enough energy for a light bulb, but I do not have the quantised figures I am afraid. I was told this verbally over breakfast with a chap that worked there. .... as for the conclusions drawn as to the viability of the process??.. well - they are still building ITER I think.. so it must be viable to enough to chuck billions into a new tokamak. (Not sure why I couldn't get the quote button to work today - no worries)

Money is simply a "medium of exchange", by definition.

The JET broke even in 1996!.. I do not know what ITER has been doing - I haven't been following it. Where do you work? I would have LOVED to work on the problem, but my grades were not high enough to get a research place at JET. Now I have a Ph.D., but in the wrong field to seriously consider applying to work on anyhting fusion related.

Got to be worth a try. Good luck - will be interested to see if it works - let us know how you get on please if you attempt a repair and let us know what product you use. Cheers. I'd also be interested to see before and after pics of the phone before and after the repair attempt.

Err... how did you get on then? Let us know!.. ;-)

In fact, I've been thinking about this... if the girl falls asleep inside the fairy ring then she must be outside... probably in the autumn, as that is when things get more mushroomy. Outside, asleep in the cold and the damp, surrounded by fungal pores! So - not only extra weathering due to cold and damp, but the pores probably attack the young girls face and cause fungus to grow there - the accumalative effect of prolonged sleeping under such conditions with fungal attack will be making her face go all pitted and wrinkled, thus making her look/turn into a hag.