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coquina

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Posts posted by coquina

  1. Hi' date='

     

    I've got a small block of mild steel. The whole darn thing is rusted and black all over. I dont want to file it, but want the rust removed. Can it be done using simple things found in and around the house?

     

    Please help.[/quote']

     

    It it black everywhere it is not rusted? If so, it was probably treated with "black oxide" a chemical process that inhibits rust, but it doesn't last forever. If it is not horribly crusted in rust you can get an industrial scotch brite pad, spray the block with WD-40, and rub it off. You can also use a wire brush. You can get a wire brush attachment for a power drill at Home Depot as well as the scotch brite pad.

     

    After you're done, spray with WD-40 and wrap with a cloth rag. It will keep the rust away.

  2. Unless you plan on making a career out of being a student, you are going to get to a point in your job that you are bored. I have done the same thing for 30 years - what do I do to challange myself? I find a science forum where I can talk to people all over the world about neat stuff.

     

    Also, things that you are learning now need to last you for the rest of your life. You can read something, understand it, and pass the test. However, if you don't do the same thing on a repetitive basis, chances are you won't remember it. On the other hand, all those practice problems help ingrain what you have learned into your long term memory, you may still need a little refresher later on, but it will come back to you easier.

  3. I don't know how to say this so I'll just say it......why aren't you there with her? I would be. If you were my mother' date=' I would want you with me.

     

    Bettina[/quote']

     

    Because her son, my grandson, is here. ( Her ex, who works for me, has custody - long story.) She said if she has to have surgery, she wants me to bring him up there. If we are playing a waiting game, she wants him to be here, in school. If her husband calls and tells me surgery is imminent, I will take him out of school and we will go to DC. Otherwise, we will wait til Friday PM or Sat AM. It only takes me between 3 and 4 hours to get there.

  4. dear coquina' date=' this may be tactless or insensitive of me to say it but there is a "sociological" dimension to this.

     

     

    So, though it may seem insensitive of me to say it, when you are having a very tough time with serious lifethreatening stuff, it looks to me that there is a secondary problem that nobody seems to notice-----[b']your immediate family is just too darn small and always has been[/b], and furthermore this problem is widely shared ( my own and my wife's immediate family is also too small and too scattered all over the country).

     

    well maybe something to think about that more than one of us could think about, not you alone

     

    Yeah, Martin - You're right. My mom and dad didn't have me until she was 42 and he was 40. Not for lack of trying, there were several still births. Aside from no siblings, I was never close to aunts and uncles and they have been dead for years.

     

    My "family" consists of my employees, my neighbors, and my church family. All of those people have been very supportive of me. I do regard my internet friends with great regard as well. Especially here, where some folks have pointed me to some links which have been very enlightening.

     

    My son-in-law just called - he's had to take her to the ER. She's having blinding headaches, nausea, and is totally disoriented. I'm waiting to hear what's to be done next, but unless they can do something to stabilize her, I expect to be taking my grandson to DC shortly.

     

    I'm crazy with worry, but find this interactive fellowship distracting if nothing else.

  5. But as I said, just buying the stuff isn't as much fun. :D If I go and react a tiny chunk, not only do I get to see a potassium reaction, but it can be useful as well. :D

     

    How do you know how that tiny chunk of potassium was processed? Are you sure it is pure? If something is manufactured for human consumption there are all kind of stringent requirements... for example, the food processing machininery must be lubricated with vegetable oil. There's no telling what kind of trace of a deadly contaminant might be attached to it - I advise you strongly not to imbibe of that concoction.

  6. Hello' date='

    I am new and couldn't figure out where to post :confused: so I decided to post here. Sorry if it was the wrong one.

     

    Question: Due to the Earth spinning, the ocean currents of the Norther Hemisphere of the Earth are supposed to circle in a clock-wise direction, for example, The Gulf Stream. But what I do not understand is that why do some currents go in the opposite direction. For example, the Greenland Current.

    Please explain this to me.

     

    Thank You :)[/quote']

     

    There is a really good explanation of the hydrologic cycle, including ocean currents and their movements (ya gotta read all the way to the end) here:

    http://www.indiana.edu/~geol105/1425chap4.htm

  7. Chromium picolinate is a component of several weight loss products including "Metabolife"

     

    http://pharma-help.com/metabolife-356

     

    Aside from not working, studies show it is mutagenic and carcinogenic.

     

     

     

    http://www.advisorybodies.doh.gov.uk/Com/chromium.htm

     

    Chromium picolinate and other chromium compounds

     

    6. Chromium picolinate contains trivalent chromium bonded to three molecules of picolinic acid. The formation of additional chromium co-ordination complexes with each molecule of picolinic acid through the lone pair of electrons present on the nitrogen aids the stability of the molecule. Picolinic acid is an isomer of niacin (vitamin B3) and a minor metabolite of tryptophan metabolism. Unlike other trivalent chromium compounds, chromium picolinate is soluble in water at neutral pH.

     

    Absorption, distribution, metabolism and excretion

     

    7. The data on the absorption, distribution, metabolism and excretion (ADME) of chromium picolinate are limited. The available data from human volunteer studies and from experimental studies in rats suggest that the gastrointestinal absorption of chromium picolinate is significantly greater than of other forms of trivalent chromium and is comparable to that of hexavalent chromium.

     

    8. In a recent in-vivo ADME study, rats were given a daily intravenous dose of radiolabelled chromium picolinate (51chromium or 3H- picolinate) for 14 days.1 Retention of chromium was substantial, with daily urinary and faecal excretion of approximately 10% of the 51Cr at the beginning of the experiment, increasing to approximately 20% by the end. The majority of the radiolabel was found in the urine and when subject to column chromatography co-eluted with chromodulin. 3H-labelled material was largely excreted via the urine. At the end of the treatment period, both 51Cr and 3H labels were widely distributed in the tissues but were predominantly present in the liver, where the sub-cellular pattern of distribution differed to that in other tissues. Thus the absorption, distribution, metabolism and excretion of chromium picolinate is complex and includes some degree of dissociation.

     

     

    Oxidative damage

     

    9. Hexavalent chromium is readily reduced to trivalent chromium both in vitro and in vivo, resulting in oxidative and cytotoxic damage to cells. The evidence for oxidative damage in vivo, after treatment with chromium picolinate includes increased urinary excretion of 8-hydroxy-2' deoxyguanosine and increased lipid peroxidation in liver and kidney cells of rats.2 Evidence of in vitro oxidative damage includes damage to mitochondria from CHO cells and lipid peroxidation in cultured macrophage J774A.1 cells.3,4 However the only other in-vivo study available does not report any oxidative damage associated with chromium picolinate or with other forms of trivalent chromium.5 Overall, it can be concluded that chromium picolinate induces oxidative damage in vivo to a lesser extent than hexavalent chromium compounds. However, in-vivo oxidative damage associated with chromium picolinate treatment has been reported by only one research group, where the test material was synthesised in the laboratory.

     

    Interactions with DNA

     

    10. Trivalent chromium compounds are able to bind DNA and RNA in cell free systems. While some studies with chromium picolinate suggest little direct interaction with DNA,2 Speetjens and colleagues,6 have shown a dose-dependent relaxation of supercoiled plasmid DNA to the circular nicked form by trivalent chromium picolinate in the presence of ascorbic acid and air. The authors noted that chromium picolinate was stable and thus could be incorporated into cells intact. They further speculated that ascorbate could reduce trivalent chromium to divalent chromium, which could then enter Fenton or Haber-Weiss reaction cycles to produce hydroxyl radicals leading to oxidative damage. Members considered that more direct evidence was required to confirm this suggestion.

     

    11. Chromium picolinate induces DNA fragmentation in cultured J774A.1 murine macrophages.7

     

  8. i thought that the hips broke, leaving scars called 'scarsof partition', and i thought that was how archaeologists told if a scelooton was female, from if it had these scars on the hip?

     

    From Pub Med, here...

    http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=677299&dopt=Abstract

     

    A re-examination of parturition scars on the human female pelvis.

     

    Holt CA.

     

    Pits, cavities and depressions located on the dorsal surface of the pubic symphysis of females have been attributed to the trauma of parturition. Earlier research based on human skeletal remains provides inadequate information on the individual's obstetrical history. The 68 female pubic bones that were studied had comprehensive medical records indicating whether or not each female had given birth. Fourteen and one-half percent of the females who had not given birth exhibited trace to small scarring of the pubic symphysis and 23.4% of the females who had not given birth exhibited medium to large scarring. It is suggested that bony changes previously used as an indicator of child bearing must be re-examined in light of the fact that "birth scarring" has been found in women known not to have had children.

     

    At any rate, "pits, cavities and depressions" wouldn't indicate a bone had been broken. You have to remember that a person with a broken hip would not be able to walk.

  9. I just heard that the pope's casket's are wood around Zinc. isn't Zn a good Reduction agent so won't it corrode fast?

     

    Thank you

    :confused:

     

    The inside casket is lead according to what I saw on TV.

  10. Hey everbody

     

    i have a sociology paper due in two weeks' date=' and the topic is school shooting and violence.

     

    i came acroos some very cool statistics but i can't seem to get a hold of any theories that i can cite

    if anybody has info on such theories such as causes of school shooting or its consequences on society, please let me know the author or if possible the website/book i can find the info

     

    also any original ides about causes are appreciated.

    thanks[/font'] :confused:

     

    I'm going to give you an entirely different take on the subject.

     

    People have an idealized vision of what it is to kill something or someone, but relatively few people have seen it happen in real life, much less participated. I was exposed to guns at an early age, and my father taught me to hunt. I had this visualization of hunting I guess as "bringing home the bacon" or something like that.

     

    Side track - I know this isn't a hunting or animal rights thread - I'm trying to make a point.

     

    I shot a squirrel and didn't kill it the first time. It was struggling and flipping around on the ground and I had to shoot it again to put it out of it's misery. I remember watching the light go out of its eyes and I never killed anything again.

     

    While I don't condone hunting - you kill an animal and get a big lesson. You kill a person and go to jail.

  11. My dad was, regretably, a physical abuser. But he also had unique methods of punishment that worked quite well. He kept horses and raised field corn to feed them. When we harvested the corn it was put in the corncrib, husk, cob and all. There was a manual corn grinder - it was made of iron, and had a disk with knobs on it. You husked the corn, which was hard and dry and hurt your hands, put the cob in the grinder, turned the wheel, and the grain when out the bottom and the cob shot out the side.

     

    When I misbehaved, my dad would tell me how many ears of corn I had to grind in atonement. I could do it slowly and take all day, or I could do it promptly and be done with it. Considering that the corn crib was either below freezing or above 90 degrees, one did not dally.

     

    I told this story to point out that if there is a particular chore a child despises, it is an effective means of punishment. My dad knew I hated to grind corn, and as long as I kept on the straight and narrow, either he or my mom would do it. But - infraction of rules inevitably earned me an appointment with the corn grinder.

  12. I wonder if anyone else has experienced something like this....

     

    I'm sitting at dinner with some friends, and two of us are discussing someone we both knew years ago.

     

    "What was that guy's name, it's right on the tip of my tongue?"

     

    "I can't think of it either. I remember he worked at thus and so place, he was big and bald, and wore the craziest ties."

     

    "You're right - that's him, same guy."

     

    So the conversation changes, and now I'm talking to someone else about something else. Suddenly, the name from before comes to me, I turn to my other friend, and say "That guy's name was Joe Schmoe".

     

    I have this picture of a little elf in my brain going back in the archives to the file cabinet marked 1975, blowing off the dust, knocking away the cobwebs, and rooting through the files even though I'm not aware of it. All of a sudden, he finds the right file, and shouts "Joe Smoe" in my ear.

     

    Am I nuts, or does anyone else have this happen?

  13. The exact thought would most likely occur to business owners across the US, and I'd be willing to wager that the more unscrupulous ones wouldn't be as considerate as yourself, i.e., they wouldn't consider paying out an equivalent amount into a retirement plan of any sort.

     

    I'm betting the government would require employers to pay the matching funds to social security, whether the employee opted out or not.

     

    Now, the employer contributions are tracked through W2 funds, and are balanced against payroll deposits. If employers didn't pay the government, how would they know that the funds were dispersed at all?

     

    They couldn't audit every company 100% every year to make sure all funds were paid where and when they were supposed to be, unless they hired thousands of additional employees.

  14. I have to match what my employees pay in. Am I off the hook for employees who opt out? Do I have to pay the equivalent amount into whatever retirement plan the employee wants? This would be a bookkeeping nightmare for companies with many employees.

     

    I have been wondering about this through all the talk of privatization - maybe I missed it, but I haven't heard it addressed.

  15. That's what my daughter has. It is not immediately life-threatening, but it is slowly leaking tiny amounts of blood and causing her to have mini-seizures. It is not in an area of the brain that is operable. The treatment her doc recommended is gamma knife radiation, but for now she is being treated with dilantin to stop the seizures.

     

    Does anybody know anything about this problem? I'd like to know more about it and what kind of research is being conducted.

     

    Thanks for all the prayers, good vibes, and candles.

  16. I think it is extremely difficult to find a compassionate way to question these children also.

     

    Several years back there was a man who was arrested for molesting children at a day care center. I believe he was the owner's son. At first, there was only one complaint, but it grew into dozens. When the tapes of the psychologists who interviewed the children were reviewed, it appeared that the asked "leading questions" over and over. After initial denials the children would change their story. It seemed they did it because they got vibes that saying the molestation had occurred would please the councilor.

     

    I'm sure it must be tough to get a child to admit s/he has been molested without inadvertantly "putting words in their mouths".

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