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About C_Sagan_Returns

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  1. Oh wow, kewl!! I never knew that, thanks so much for the ideas. This was the kind of reply I was looking for. Please, keep em' comin' guys and gals. Also, I understand that most of these species are found almost everywhere but, any suggestions as to how I should isolate these beasts would be much appreciated. CSR
  2. The most obvious example of current conduction in biological systems is that propagated by the "action potential(s)" of nerve cells (as previously stated). A more specific and fascinating mechanism of electricity production in biology is that of ATPsynthase. ATPsynthase is a membrane-bound protein-complex comprised of dozens of species which together function as a molecular turbine. This "proton pump" funnels the residual hydrogen ions (protons, +), left over from the various metabolic processes constituting life, outside the cell. This continuous dumping action inevitably creates a
  3. Currently enrolled in Applied Microbiology, I'm responsible for developing a culture collection of > 10 different species. Having only a simple general microbiology background, I don't know many microbes by name. It's been suggested that we bring in samples from outside the classroom and try to isolate and culture several specimens. Fungi can be included, but bacteria should be the focus of this collection. I'm looking for any ideas so feel free to namedrop. Here are some ideas I've got so far: Fungi: Geotrichum fici -- While looking up various genera for an assignment, I discovered
  4. I didn't see anything about exact measurements and different percentages of vinegar. The video only mentions 1L of vinegar and 84g of NaHCO3 (to my knowledge). Was this extra information located in the "sidebar"? If so, I couldn't figure out how to access it!! Where is this "sidebar"? The video also mentions that the final product may develop a yellow tinge as one removes 9/10ths of the water by way of boiling the solution. If one's "Hot Ice" preparation came out dark yellow in colour, would activated charcoal clear up the solution? (I'm not really sure how that stuff works, I just know it
  5. I saw on wikiHow a pictorial on making "hot ice," and it says, "If you don't have sodium acetate, you can make your own from baking soda and vinegar, but it's time-consuming. Keep adding baking soda to vinegar until it stops fizzing; this reaction yields a diluted solution of sodium acetate and water. Then boil off all of the water to make sodium acetate crystals, which you can treat like the powder as described in the instructions above." What would be the cleanest, most efficient way to make Sodium Acetate? Once it stops bubbling, any extra baking soda might contaminate the desired s
  6. Is there a CRC or Bible for biochemists? Basically, a reference book which one could use to look up the intra/extracellular concentrations of various metabolites, proteins, lipids, membranes, plasmids and or other macromolecules possibly organized by organism. Maybe containing lists of good buffers to use when working with particular cells or lists of the compositions of certain cells. You name it, it would be found in this tome. Does such a thing exist? What is it? Thanks, CSR
  7. What is the name of this fungi, the article does not specify? Also, let's not forget about Deinococcus radiodurans... http://en.wikipedia.org/wiki/Deinococcus_radiodurans CSR
  8. Whether plants, animals or bacteria, life requires Phosphorous (P) in order to carry out cellular work and provide the hook or glue which links the nucleosides of DNA and RNA. Hypothetically speaking, if one were to prepare media will phosphate buffer, it’s not improbable that Phosphate ions might inadvertently be used as a nutrient. Such processes would eventually destroy the buffer's capacity to stabilize pH. Even under conditions of lower pH (acidic), small amounts of PO4 will be present and their absorption/disappearance should be compensated for according to Le Chat's principle. How
  9. I wasn't sure where else to post this so forgive me. I've noticed many students with digital recorders in my classes this semester. There are so many different models and brands; I'm not sure where to start. I want something that works well, but at a resonable price. Good battery life and excellent sound quality are my primary concerns. I'm sure many of you own DSRs and I want to know what to check out and what to avoid. Treat this as a poll and share your experience. Thanks, CSR
  10. I’ll start off by saying I’m not an expert (as you might have guessed). So, the big question is, "what would cause something like this to reoccur?" A. Toxin – If the insect injected you with a toxin than that would be the likely culprit for the initial symptoms. Eventually though, this should be expelled from the body. B. Infection – If the insect mediated the transfer of bacteria into you system (i.e. Lyme disease), they could produce toxins, except, like in the first situation, the bacteria would likely die after treatment with antibiotics or just die out over time. C. Virus – T
  11. You can go much lower in what sense?? My point was that bond lengths are measured in Angstroms and biological processes don't exist (to my knowledge) on a smaller level than making and breaking bonds. I suppose an exception would be electron transfer/redox which operates on a smaller level (depending on the distance upon which the reaction is taking place). I think what you're taking about is either a part of quantum mechanics or biophysics not a combination. If you could give me an example I might be more inclined to agree with you. CSR
  12. Beta-N-Acetylglucosaminidase will dissolve Chitin if you can get ahold of some. Good luck with that, CSR
  13. I've noticed you've been using Histidine as an example quite often, is there a particular reason...or just cause it looks kewl? It's okay if you pick the later. So, where is histidine made? Well, you might have already learned that many organisms, including us, are incapable of synthesizing the 20 essential amino acids (including Histidine). We must acquire them from plants or other animals. Plants possess the ability to make ANY of the biological compounds they need from glucose, it's how they were designed (unintelligently mind you), so plants can make histidine if I'm not mistaken.
  14. Doesn't quantum imply that we're dealing from within the atom (or at that level)? I don't think there's such a thing as quantum biomechanics, because biochemistry covers all that. The smallest unit of measurement used in biology is the Angstrom. 1 Angstrom = 0.1 Nanometers....that's right, 10X smaller than a nanometer!! To give you an idea, a hydrogen bond is approx. 3 Angstroms (0.3nm). What exactly did you have in mind? Are you talking about something on a smaller level than this? I don't think you can go much lower. CSR
  15. For those of you trying to help me out, I finally figured out how to set everything up (thanks to my prof). Starting with: Moles Acf = moles Aci + moles OH Moles HAcf = moles HAci – moles OH Substitute: “(0.1M)Vol OH” for “moles of OH” in both equations above. Then, substitute: “(Aci)Vol Acid” and “(HAci)Vol Acid” for “moles of Aci/HAci” respectively. This will leave you with: Moles Acf = (Aci)Vol Acid + (0.1M)Vol OH Moles HAcf = (HAci)Vol Acid - (0.1M)Vol OH These two equations can be plugged into the Henderson-Hasselbach Equation yielding: pH = pK + log[ ( (Aci)Vol
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