pyroglycerine

Hello In regards to laboratory machines such as mass spectrometers, electron microscopes, sterilization units, etc. Who are the leading manufacturers and suppliers? Are there any large companies that produce everything from spectrometers to hot plates or do all these products have separate manufacturers? Thanks for your time, Regards, Pyroglycerine

Application of AC and DC (in separate experiments) through two electrodes (the positioning of which will also have seperate experiments - above and below the soil, attached to the plant, etc). The voltage and duration will also be varied in separate experiments. There are a lot of variables to play with so it will be a long-term series of experiments rather than a one off thing.

I have heard of the kits, however they are not easy to find here in China, maybe I can bring one back from the UK. Yes, I have actually been thinking of setting up a hydroponics system for a more controlled environment. Thanks for your help

I don't think that level of precision is important. I lied because I was wrong. I got annoyed because you showed me I was wrong. Quite childish. My apologies for the outburst. I am appreciative for your input, although you may now think otherwise. I should have done some research first before posting. So, if I may be so bold, could you help me with that? - What level of accuracy would I need for analysing effect on plants of moderating macro-nutrient content in soil? (i.e developing a chemical fertilizer) Thanks

The latter. For example John, if the correct measurement is 0.003%, then I need an accuracy of 0.1% error within that number. So, 0.003% + 0.1% = 0.003003 or -0.1% =0.002997% ''Chemistry Expert'', I'm yearning for the day when you give a useful answer. Of course, it's up to you, but I would ask you to kindly stop commenting on my threads unless you have a direct answer to my question(s).# Thanks

Hi, After finding no reliable sources detailing the effect of electrical charge on the growth of plants, I have decided to begin conducting my own series of experiments. Please help me in establishing a set of control variables. My list so far: Temperature Humidity Sunlight Primary and Secondary Macronutrient Content in Soil (Please Help) Water CO2 Content in the Air Growing Space Altitude Is there anything else I should consider? Or better yet, is there an established set of official guidelines for conducting experiments on plant growth? Thanks, Regards, pyroglycerine

Hi, I need to conduct soil tests for the plant macronutrients: P, K, N, Ca, S, and Mg. A test for Nitrogen seems fairly straightforward using the Kjedahl Method. According to several online University sources, tests for Phosphorus and Potassium each require the use of a rotating shaker. Is there a method which does not, or an alternative device to the rotating shaker? (I don't have $200+ to spend on a rotating shaker right now). Where can I find detailed methods for determining Ca, S, and Mg content in soil? NOTE: Accuracy should be within +/-0.1%, higher accuracy is not necessary. Thanks, pyroglycerine

Thanks ..I've been waiting for an answer for this for a while .. So,why would they not exist,could you explain please? So I'm assuming that that they were just using I, II and III as an indication of colour and not oxidation state then? It's university, not high school.

The Plague, by Albert Camus

Thanks Schneibster. I think if I want to learn about it properly and gain a thorough understanding I'll have to start by learning the fundamentals of theoretical physics and cosmology. It seems far to complex a subject to dive in at the deep end so to speak, hence why the program left me confused. Apart from wikipedia, can you suggest any good reading? Is Stephen Hawking's 'A brief history of time' a good place to start? (Bear in mind this is for leisure, I have my Chemistry degree to focus on at the moment)

I agree. I also did this experiment back in high school, with graphite electrodes. Same think happened to me! I foolishly knocked over a conical flask full of solution which was giving out chlorine gas , and we had to evacuate the class. For at least a month they called me a Nazi EDIT: SORRY! I Didn't mean to necropost, I just forgot to read the date!

Thanks for the input guys!

Thanks!

It was quite vague to be honest, I guess so the wider audience can understand. They talked about the string theory that matter exists in strings of which are all interconnected in 10 spacial dimensions which forms a membrane that is our universe. They didn't go into much detail, which is frustrating because it made it very hard to picture. If thats what you meant by the string landscape then no, they didnt say much about it. I would like to learn more though, its very intersting.. Any suggested reading? Also, they claimed the singularity problem of what caused the big bang was solved - it was caused by two universes colliding. But surely that's a paradox because then what created those universes. You cant just solve the problem by saying that there is an infinite number of universes which all created each other!