Please hep with this lab question?
963001
First of all you should give us more info, like what exactly is the elimination test, concentrations, conditions and if you know the pH of the final solution or the final concentration of acetic acid.\n\nA very rough explanation based on the limited info, would be that HF is a much stronger acid than HPO4-2, so in an acidic environment it manages to dissociate much better, giving the conjugate base or if you prefer the conjugate base F- is much weaker than PO4-3 so PO4-3 will steal away the H+ from the acetic acid. Thus it is possible that in the acidified medium you have most of the phosphate in the form of HPO4-2, and the concentration of PO4-3 is too low to lead to precipitation.\nOn the other hand, although CaF2 is much more soluble, most of F- will remain as such and thus its concentration might be high enough to promote precipitation.
614020
Here it is! With no hustle!\n\n\nFor pure DNA sample at 260nm wavelength measurements,\n\nOD of 1 = 50 micrograms/mL\n\nFor pure RNA, at the same wavelength\n\nOD of 1 = 40 micrograms/mL\n\nPeace!
677436
I am a scientist.  I am trained in hematology, not physics, though I have a good understanding of many principles, and I love exploratory thought processes.  If you want to shoot me a line, I have connections at the Ferme lab in Ohio (if it goes anywhere), and, of course, I'd be personally interested to hear it.\n\nianklansek@yahoo.com
909726
are you asking a question here or are you trying to preach. well i don't deny the presence of God and i am quite a religious man. but i think it was quite a absurd way to manupilate the facts as you did. u have combined the holistic approach and the scientific approach to arrive at a pseudo conclusion. why are u using that -ve ion and positive ion theory. in fact if you look at the sperm, u will find thatit is nothing but a single strand of DNA with few protiens and yeah proteins are postively charged ions but the same protein are present in ovum too and infact in larger quantity than in sperm,, so the ovum is bound to be more positively charged, if we go by your hypothesis.\n\nbetter u correct your facts before you post.\n\nP.S: i would have answered longer still and would have posted thousands of doubt in your question if i would have time and patience to go through your question completely. but unfortunately i don't think it's worth my time to waste my energy on such a stupid question. \nyou are making the mockery of GOD as well as science
149463
I have taken numerous cardiac classes and would like to help you, but I need more information. What do you mean "working off 60% of its power"? Did your specialist measure your MABP? If you'd like to give me more info so I can help you out you can e-mail me @ mary.edwards4543@my.sinclair.edu
173439
Sequential blood samples were evaluated from 3 subjects with AHIV (negative HIV EIA, positive HIV RNA), identified 2-3 days before peak viremia (pre-peak). HIV RNA levels and CD4 counts before antiretroviral therapy were used to estimate HIV doubling time (t(d)) and, the basic reproductive number (R(0)). HIV t(d) was calculated from the slope of ln(RNA) vs. time during rising viremia. Maximal estimates of t(d) were 1.6-3.5 days.\nhttp://www.aegis.com/conferences/croi/1998/521.html
469125
A link to a protocol from Alpco Diagnostics:\n\nhttp://www.alpco.com/pdfs/30/30-2201.pdf
763720
You should do your homework on your own,,, Besides, I sat here for a few minutes and I could not figure it out.\n\ncirrhosis (of the liver)
386654
You can use a variety of things. Normally we will test it with this protein substance called luminol; they even have preswabbed cotton buds to test for it on scene. However if you do with for a more accurate measure what they normally do is they go to the mobile field lab and test it with RH-Antibodies.
607610
I have no idea on the exact reason (was it a committee decision?). However, 20 deg C is room temperature. This is an easy temperature to achieve and it probably really close to the temperature of the lab where they would be taking this measurement. In short, convenience
151542
To answer this question, you must supply two quantities:\n1) The area of the tip of the needle: let's call this value N.\n2) The area that one of your microscopic entities occupies: let's call this value M.\n\nOnce you have these two numbers, simply divide N by M to get your answer.
1096753
When you work with unsealed radionuclides, used as tracers in a cell laboratory, you need to be checked periodically to see that you have not ingested any. I worked with soluble chromium-51, used to watch the destruction of lymphocytes (white blood cells). The way you get checked is that you submit a urine sample in a clean, clear container. Everyone gets the container, fills it, and was to bring it back to a technician. \n\nThe technician was a very beautiful redhead woman, Bernie. She was our electron-microscopist. We occasionally played small tricks on her, she on us. Everyone flirted with her. Harmless things. We were grad students, she was used to our stupid boy things.\n\nSo... one day I got the container and was supposed to give her a sample. Instead I went down to the cafeteria and bought some apple juice. I let the juice warm to room temperature. Then I poured it in the clean urine sample container. I know, you see this coming, right.  I went up to the lab where Bernie was.\n\n"Hey, Bernie," I said, "where do you want the sample?" She indicated over on the bench. She was busy with some small group of folks.\n\n"Bernie," I called again. She turned and looked. "I think it looks a little weak. I think I will run it through again." With that I opened the "urine" sample (really apple juice, of course) and drank it in one gulp.\n\nBernie turned bright red, as only a true redhead can, all the way to her roots. No freckles were left, she was beet red. She sputtered my name and then said, pointing to the people with her, "These are the representatives of the People's Republic of China who are touring our lab."\n\nGulp!  Well, guess they saw we Americans were pretty much what they thought we were.
406869
I think you miscopied the third item.  You have copied one of the first helf cells, not given a reaction.
1033785
Its possible...I wouldnt worry too much, I would assume that the blood center who drew the blood tested it for a variety of dieases before they would hand it over to the hospital.
553909
I dont think so unless it's something new.  For sure hep b hep a more for traveling.  I gave my sone both myself Iam a nurse.
327822
Are you looking at any protein in particular?  Look up in situ hybrdization for proteins ( at least it will give you an idea where it is localised).  I think that it would really depend on the system ad proteins that you want to study, so I am not sure how much else I can tell you, sorry.
571244
I work at a blood bank and I have never seen anything get past our lab it is possible but rare. Most hospitals make sure that the centers that they receive blood from has excellent track records.