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ewmon

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  1. We assayed creatinine in samples in a forensic lab to determine if the samples were urine. If the creatinine levels were too low (or zero), we concluded that the samples were not urine. Substances that failed the "urine" test were then assayed "olfactorily" by humans, as it were , to try to determine their nature, and we made a few conclusions, namely, apple juice and pickle juice were the most common counterfeits used. Forensically, we could not use urea because the kidneys can re-absorb urea from urine, but kidneys cannot re-absorb creatinine, leaving creatinine to be the more reliable marker. In your case, other factors apply, such as the inorganic production of urea (as a wild guess, perhaps acidic rainwater percolating through UFFI, Urea-Formaldehyde Foam Insulation — who knows, right?), and also would any marker decay over time or exposed to wood flooring etc? FYI, ancient scientists thought that urea was solely the product of biological processes (so they would collect urine from farm animals for lab use) until the early 1800s when someone produced urea in the lab using inorganic materials. But how much solution do you use to produce a sample? That is, what dilution do you want your sample to be? I don't know, but if you use this method, use distilled water. As for testing your sample, a drug-testing lab should do, just make sure they assay creatinine to test for the urine-ness of their samples (which they probably do). Who knows, you might also find the dogs were also gobbling up discarded roaches. PS — Drug-testing labs typically test for aldehydes as they are used as an adulterant to ruin the drug tests. So, if your sample tests positive for creatinine and aldehydes, then my crazy UFFI theory would hold some water (no pun intended ). Personally, I like the blacklight test, as it is simple, cheap, repeatable, and reproducible and you only really need to test for organic substances — whether it was urine from pets or bodily fluids from slaughtering chickens in the kitchen doesn't really matter, does it?
  2. Delbert, the difference in the configurations you describe is rather subtle, but very important. Many cells combined in parallel electrically are parallel in the electrical sense. Many "cells" combined in parallel chemically/physically are parallel in the chemical/physical sense as well as in the electrical sense. Consider the simple demonstration with cells consisting of two electrodes in a solution, like a typical lead-acid automobile battery cell. Battery A is one huge cell (that is, many small cells combined in parallel chemically/physically). Battery A can compensate for imbalance in its reactions both chemically/physically (within its solution and reactions) as well as electrically (within each electrode). Battery B is many small cells combined in parallel only electrically (through circuitry). Battery B can compensate for imbalance in its reactions only electrically (within the parallel circuitry between the cells), and not chemically/physically because its cells do not share a common solution. This is why multiple separate parallel cells/batteries and their circuits are more prone to high currents and the dangers that follow than are large singular cells/batteries.
  3. He engages in the same "cherry picking" that many so-called "expert" Christian scientists do — they almost never do their own research, but refer to scant, particular works by scientists to support their beliefs. And the Bible never actually makes a 6,000-year-old claim; it's really a guess.
  4. Actually, software has several somewhat verifiable aspects — Does it perform according to spec? Was it written within the time and budget constraints? Is it concise and memory/processor efficient? How many revisions were required before "getting it right"? Was it annotated/documented sufficiently for another programmer to understand what each section does? Is it robust enough to undergo future modifications without massive rewrites?
  5. ewmon

    DNA coding

    I would think that organ shape and size involves cell differentiation, cell fate, axis determination, etc.
  6. ewmon

    Vedic Astrology

    Don't know the time, but maybe in the morning. Anyway, Saturday 21 May 1960 in Milwaukee, Wisconsin.
  7. Try researching (separately) neurogenic protein, chickadee brain cells, and human neuroplasticity.
  8. Let's review the categories of equipment you might consider using. Each category uses a different design based on its purpose. A compressor is a machine for raising a gas to a higher level of pressure without necessarily moving it (such as pumping up a bicycle tire). A blower is a machine for moving volumes of a gas with a moderate increase of pressure (such as a leaf blower). A fan moves large amounts of gas with a low increase in pressure (such as a carpet dryer or a building ventilator). I suspect that a leaf blower falls into the "blower" category and that the carpet dryer falls into the "fan" category. The leaf blower is designed to generate aerodynamic forces against objects in order to move them. The carpet dryer is designed to blow high volumes of air across a carpet so as to augment the evaporation of water after it has been washed etc. As has been said before, CFM is not the characteristic that determines whether the equipment will lift/move a hovercraft. For all three categories, I suspect there's a pressure threshold over which the equipment will begin to fail (that is, fail to produce the pressure differential). Fans have the lowest threshold, blowers have an intermediate threshold, and compressors have the highest threshold. Let's look at what you want to do, and see what sort of characteristic derives from it. You want to create [a differential] pressure under a hovercraft that will lift the hovercraft off the ground and allow it to ride on a cushion of air. Compute the weight of the hovercraft as used (including rider(s) and fuel etc. Compute the area within the skirt. Divide the weight by the area. This computes the pressure differential between the ambient air and the pressurized air under the hovercraft, and creating such a differential will cause the hovercraft to "lift off". I suspect that this differential would fall within the do-able range for many blowers, but that it would exceed the threshold for most/all fans. I used another kind of "blower" for a homemade hovercraft — a vacuum cleaner. For its intended use, a vacuum cleaner generates a pressure differential in reverse by creating a partial vacuum to suck objects into the vacuum cleaner.
  9. I think a principle to understand is that when a voltage first acts on a capacitor, it has very little resistance, just like a short circuit. If the voltage is DC, a voltage builds within the capacitor which, at time = infinity, will equal the voltage applied to the resistor, and the current will stop, just like an open circuit. So, whether the charged capacitor is in or out of the circuit, it does not change the circuit. It seems that question "a" assumes that time = infinity, so if you remove the capacitor from the circuit, you might see better what studiot means by voltage dividers.
  10. A fairing would protect the rider from the wind. To use an interesting example, here's the famous electric motorcycle dragster named Killacycle reaching 60 mph in 0.97 seconds (almost 3 g's) and reaching 168.49 mph (about 270 kph and 250 fps) at the end of the quarter mile. One moment, you can reach out and touch the rider, and the next moment, he's simply gone, gone, gone!
  11. It's not easy to determine. There's the wing's area to consider. Have you searched for other ground effect vehicles?
  12. I have my own modification to a method of mutliplication using fingers, and I have a simpler/easier method (than they teach in schools) of multiplying numbers on paper which forms an inverted triangle. It's simpler/easier because there are fewer "carries" and it works really well for squaring numbers.
  13. To understand what someone with locked-in syndrome might experience, I suggest reading The Diving Bell and the Butterfly, the relatively short, yet amazing autobiography of Jean-Dominique Bauby, chief editor of the French magazine Elle, who suffered from it (and died). He spelled out every word in his book by blinking his one usable eye. In literature, a character with locked-in syndrome appears in the novel The Count of Monte Cristo, which seems to be the first mention of this condition in fiction or non-fiction. In America, if a doctor says you need this med or that therapy, the patient can sign an AMA form (Against Medical Advice) and then go do whatever they want to do. Just because a doctor says something doesn't mean that the patient must abide by it. I knew an old woman with lymphatic cancer, who simply stopped the chemo treatment, stopped taking nourishment, eventually became unresponsive, and expired at home a few days later surrounded by loved ones. She took the natural course. What you need to do is press the "mute" button on doctors who insist on prolonging one's life no matter what. It's like the dentists who think everyone should die with all their natural teeth in their heads. Of course they do, that's how they make their living. As the saying goes, "Never ask a barber if you need a haircut". First it's fillings, then it's crowns, then it's root canals, then it's implants, and finally it's dentures. Stop paying for their in-ground pools or their around-the-world cruises. I knew a kid in middle school with a full set of dentures. Who cares? I wouldn't doubt that doctors have given patients the option of death for many years now. For patients with cancer or other painful diseases, they might prescribe an opiate for the pain and warn the patient that it might be fatal if they "took too much" and then proceed to tell then how much is too much. So, one day, when the patient can't bear the pain anymore, s/he takes "too much" medication and dies. The funeral announcement would state that the person died from complications caused by their cancer, and their death certificate would state opiate overdose as the cause of death with advanced stage cancer present. No mystery there. At the wake, the word would go around in whispers, heads would nod knowingly, etc. Why prolong the suffering? Funeral announcements have used code words for as long as I can remember regarding suicide from depression. If the person suffered depression for years before killing him/herself, the funeral announcement would say that s/he died from a "chronic illness". If the person suffered acute depression (such as the sudden loss of a loved one) before killing him/herself, the announcement would say that s/he died from a "recent illness". The point is, people have been committing suicide for many years now, it's just not that obvious.
  14. These apparently are something of the rage within the voluntary simplicity movement. Google mini homes or micro homes or tiny homes. Or, if you want urban, then find an alley and start building (like the "Skinny House" in Boston below). Be careful what you ask for.
  15. Flying 500 km/h within ground effect? And 500 km/h in 3 seconds is almost 3 g's! Please give your loved ones my condolences. Where should I send flowers?
  16. Canned tuna is mostly muscle cells, and any cell is mostly water. I'm pretty sure that the "water" being discussed here is not the water that people drain from a can of tuna. Instead, it's the water within the cells ... think of it as "biological" water" necessary for biological processes to occur. I have extracted proteins from foods, and it can take many forms, but it certainly wouldn't look like the pieces of tuna that we see in a tuna can. Think Soylent Green.
  17. I would say that, generally, chemists use chemistry equipment and chemical engineers (of the two choices you gave) are more likely (and able) to at least assemble equipment, if not design/invent them. But there are no hard and fast rules. For example, the Beckman-Coulter company was formed by two guys, Beckman and Coulter. Beckman was the chemist who invented the electrical pH meter. Coulter was an engineer who discovered the Coulter principle and invented the Coulter counter.
  18. The medical community compares a medicine's analgesic effect to morphine (used as a "benchmark"), which doesn't mean that it can simply substitute for morphine, even if diluted or concentrated appropriately. For example, think of the extremely unhealthy — probably lethal — amount (for a person's liver and kidneys) of paracetamol/acetaminophen/Tylenol that a person must take as a substitute for morphine. Potency is just one characteristic, and because sufentanil differs chemically from morphine, it has different characteristics other than potency. Medicines involve something called ADME (Absorption, Distribution, Metabolism, and Excretion). Any or all of these characteristics are probably different for sufentanil compared to morphine. And there's also side effects to consider.
  19. We trade our identities in order to participate in the uninhibited flow of ideas. For example, one of us could be Stephen Hawking, but if everyone knew that, his identity would almost completely change the nature of our threads, even in the ones he doesn't participate.
  20. Oh my, you apparently have no idea that you ended these sentences with prepositions! It's incomprehensible. It's reprehensible. Quelle domage! – Read on Old English grammar allowed one to end sentences with prepositions. When William the Conqueror successfully conquered England, he brought his Norman nobles over from France to help him rule. French grammar did not (and still doesn't) allow one to end sentences with prepositions. Doing so was an abomination ... so lower class, so pedestrian. Blech! So, the English people gradually learned that "proper" English did not include prepositions at the ends of sentences. Only the common folk talked that way. At least one member here apparently didn't get the memo on this. What do you think all those English classes in school were for?
  21. Very beautiful; color adds such dimension and life. With some of the photos showing separation of colors due to movement, were the different colors taken through the same camera in quick succession*, and how were they ever combined afterwards? What's the name of the process? No wonder everyone is posed, and broad landscapes are eerily devoid of people. (*No, see more comments below.) Imagine the common folk thinking, "He wants to take our photo!" I wonder if they ever received copies of their own photos. I hope so. I'm a little surprised by the log cabins (2, 13, 16, 22, 24, 27 and 32) as I thought they were a central European phenomenon. When I saw the man by the stream (29), I instantly thought it was a self-portrait. Could that be a dog lying on the ground behind the cart (52)? Vladimir commented on the website — So, the color separation was some sort of synchronization problem? The LOC should return these treasures to Russia and the other countries. We can make copies that are indistinguishable from the originals. Tom also says —
  22. However, the phone companies don't tell us that they're giving the metadata to the government ... or anyone else for that matter. T Jefferson said to treat the government as our enemy. I agree. Do not give the phone numbers I call to the enemy. Speaking of companies as people, Merck has been convicted of criminal fraud four times! Exactly where does the mens rea reside in a company, as it must exist for an action to be considered criminal? Companies should have an executive position with the title of "Patsy" so someone can actually go to prison for the company's crimes.
  23. I concur that metadata is private. The American government collecting metadata on our virtual lives is the same as those mandatory North Korean government "guides" following you around and noting the locations you visit and the people you conversed with, although not knowing the reason you visited those locations or the content of those conversations. If a private citizen collected metadata on you, the authorities would call it "cyberstalking". Of course it's private. I quote Wikipedia on cyberstalking (with emphasis added) — The reason why Internet companies don't automatically share metadata with the government is because doing so would distress its customers. Welcome to virtual North Korea, led by our dear Supreme Leader Kim Barack-Obama, successor of our dear Eternal Leader Kim George-Bush. I hope all of us are wearing our government-issued lapel pins. Of course we are. [/sarcasm] (Oh great! That last bit will surely force the NSA to sic its virtual bloodhounds on me.)
  24. I wonder about the feasibility of diverting first-and-originating posts with links to a cache that requires moderators to approve in order to actually start a thread. I think a high correlation exists between original-posts-with-links to posts-that-are-spam. Correct? This would not interrupt ongoing threads, but only originating threads.
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