2013-08-11, 23:52 | Link #242 | |
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2013-08-13, 11:57 | Link #243 |
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Scientists Can Now 3D Print Transplantable, Living Kidneys:
"For the first time ever, scientists are successfully 3D printing actual, living human kidneys. Like the human livers printed in the past, the kidney are currently miniature in size, but with about 90% of the printed cells being alive, the potential for human use looks immensely positive. To produce mass amounts of the living cells, samples of human kidney cells are cultured in large volumes and blended with hydrogel, a water- and nutrition-rich material that makes up the 3D printed kidneys' base. Afterwards, the printed cells can survive for up to four months in a lab thanks to this gel's rich nutrient source." See: http://gizmodo.com/scientists-can-no...idn-1120783047 |
2013-08-13, 12:01 | Link #244 |
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Stem cells turned into cancer-killing immune cells:
"The authors started with existing T cells, which would have already gone through the selection process that prevents them from attacking normal cells. They then used the techniques that have been developed to induce them to adopt a stem cell fate to grow them up into large numbers." See: http://arstechnica.com/science/2013/...-immune-cells/ |
2013-08-14, 12:54 | Link #245 |
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You've had expose yourself with the virus on its weaker state that's why maybe you've got immunity. Remember that if you have this type of patients in the hospital, they are already undergoing treatment and we can say that the pathogen were weakened. Nevertheless, vaccines if I'm not mistaken are the weaker version of the pathogen that infects human. I guess my theory make sense? xD Not sure but I guess that's most probably be the case.
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2013-08-14, 13:01 | Link #246 | |
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2013-08-14, 14:47 | Link #247 | ||
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Remember, viruses aren't living creatures. They aren't "weakened" by a human host. The number of viral particles in the host can change and the virus may undergo mutations, but a viral particle either exists or it doesn't. When we discuss vaccines, we have two types: "dead" vaccines and attenuated vaccines. With "dead" vaccines, the viral particles have been deactivated (usually be chemical treatment). The body recognizes the particles as foreign and mounts a response against them, but they are harmless. Attenuated ("weakened") vaccines are viruses that have been forced to undergo mutations, usually by putting them through cells belonging to a different species of animal. The viral particles that successfully take hold and replicate bear mutations that make them specific to the cells from that species. These mutations mean that those viruses will have some difficulty infecting and replicating within human cells. Of course, it is possible for the viruses to undergo further mutations or mutations that reverse the prior mutations, resulting in a wild-type "full strength" virus. The point here is that the viruses are "weakened" not because the host cells are doing anything to them, but because they aren't well-adapted to infecting and replicating within human cells. It's very unlikely that you'd find such a thing occurring within another human. (Note also that I'm using the terms "strength" and "weak" to refer to the virus' capabilities to infect and replicate within a cell, and not to the "health" or "power" of the virus itself.) Quote:
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2013-08-14, 15:06 | Link #248 |
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Join Date: May 2008
Location: [SWE]
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So here's a question someone might have some more info/opinions on:
On my closing shifts at work, we're allowed to eat as many free sausages as we want at the end of the shift, around 9pm. This usually serves as my dinner as I get home around 10pm, way too late for an actual dinner. Lunch is around 3 or 4PM before this, and during the rest of the shift I'm unable to get proper food. 8-9 sausages a week has been the norm for a while now. Combined with quite a serious case of IBS, this is a debacle since I can't get a very large lunch (which would result in... unpleasant consequences). The thing is, I'm very aware of industry-made sausages being unhealthy, usually filled with nitrite (at least here in Sweden), which CAN be a source of cancer. And that's not counting other areas such as diabetes etc. However, I barely drink soda (<1 liter per month), actively avoid candy/snacks, am a non-alcoholic/smoker, and sometimes work out (stepping up that part of the game atm.) Though lunch usually consists of pasta and bacon, because that's the easiest thing to make and digest atm with some kind of nutrients. With this limited info, am I at a health risk if I keep eating so many sausages for a prolonged amount of time or am I just over-analyzing?
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2013-08-14, 15:17 | Link #249 | |
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2013-08-14, 15:25 | Link #250 | |
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Nitrites aren't limited to sausages, but also to other processed meats (sandwich meats and the like). Pickled foods, which are thought to be the main cause of increased levels of gastric cancers in Japan as compared with the rest of the world, are also a large source. While that seems like a lot of sausages to be eating, it may not be a big deal so long as you're not eating other processed meats and/or pickled foods. I am not a nutritionist so I can't tell you exactly how much sausage you could get away with eating, and I don't know that there's any data to indicate safety levels either. The general rule is that the fewer processed meats, the better. If you're not eating any other processed meats or pickled foods then averaging a sausage a day probably isn't exposing you to much more nitrites than people throughout the western world are consuming and you're probably fine. If you have the opportunity to eat fewer processed meats, please do so. Regardless of the meat scenario, ensure that you're eating a sufficient supply of vegetables and fruits, and possibly consider taking a multivitamin.
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2013-08-14, 15:40 | Link #251 | |
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2013-08-14, 18:16 | Link #252 | |
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What you've heard about breakfast is somewhat correct: eating breakfast supposedly raises your metabolism for the day, so it's advised to eat breakfast rather than skip it. It's also suggested that breakfast and lunch should be your larger meals, with dinner being smaller. However, it sounds like you're eating quite a bit for breakfast. I would reduce the amount that you're eating for breakfast, and increase what you're eating for lunch and dinner. If you can tolerate it, reducing what you eat in total is the way to go. This shouldn't be a dramatic change, however. Don't cut meals or suddenly cut your food portions in half. If you normally fill your bowl to the brim with food, try filling it to only 75% of its total capacity (or better yet, use a smaller bowl). If you eat dessert with every meal, try cutting back so that you eat it with only one meal, and possibly limit yourself to every other day. While you may find yourself feeling uncomfortable and hungry at first, you will adjust and eventually feel fine with that. Once you reach that point, reduce your intake further. Monitor your weight so that you can slightly increase your intake once you reach your target weight. Exercise is recommended, not only to help with weight loss but for its other health benefits. The current guidelines suggest performing at least 90 minutes of a moderate-intensity cardiac workout per week for optimal health. There's a simple formula for figuring out what your target heart rate should be, but most people won't be measuring that. Just know that you're likely at your target when you feel that you would be able to speak a few sentences, but would be too breathless to do so if you pushed yourself harder. (In other words, it's a misconception that you need to strain and go through a ton of pain to achieve that target heart rate... but if you want to push yourself beyond the target heart rate, that's perfectly fine.) However, it's a misconception that exercise alone can result in weight loss. It can help, but dietary modifications are currently regarded as being the only effective way to change your weight. Take small steps and set targets. Reduce your intake by a little bit this week, keep it up for two or three weeks, and then reduce it a bit more again after that. You'll get there.
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2013-08-15, 11:41 | Link #253 |
The Interstellar Medium
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Thanks for the replies.
@Ledgem: At this point, I can rule out malnutrition as a risk. I had the thought, but seeing how my energy levels are fairly stable, I'm not sickly thin, I sleep relatively well and I keep gaining muscle, it'd be a longshot. The other stuff you mentioned, however, are risks I find more plausible. Especially cholesterol, which I plan to check in the near future. Currently, I'm trying to up my intake of vegetables and fish, mostly. Specific fruits are very bad with my IBS, but I get by. Processed foods in general are minimal in my diet, I think, seeing how complicated it is (fast foods and the like I eat maybe 2-3 times a month). I'm starting to remake my breakfasts to feature more vegetables as well, instead of plain ham or something. Though... It doesn't hurt cutting down on the sausages anyway, I feel, so I'll try to do that.
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2013-08-15, 12:02 | Link #254 |
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That you have IBS makes you at risk for malnutrition by virtue of IBS itself. I'm not saying that you must have malnutrition at this moment (and it doesn't sound like you do), but be careful.
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2013-08-16, 23:28 | Link #256 | |
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2013-08-17, 16:10 | Link #257 | |
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You would most likely benefit from behavioral modification. Here are some general bits of advice; use them as appropriate to your situation: 1) Force yourself to eat more slowly. Many people eat a sufficient amount of food to satiate themselves, but because they're eating so quickly their body still feels hunger and they continue to eat a bit more. While you can use some external aids (watching a clock, or some other method of tracking time to pace yourself), you can also help this by changing your eating utensils. If you're using a fork or spoon, for example, use a smaller silverware set. If your current silverware set has multiple sizes of forks and spoons, use the smallest ones (salad/dessert fork instead of the regular fork, teaspoon instead of the soup spoon). If you're using chopsticks, avoid putting the plate or bowl to your mouth to "shovel" food. This will help you to slow you down, although you'll still need to actively pace yourself. 2) Avoid situations where "mindless eating" can occur. In America the stereotypical example is eating while watching television. This mostly pertains to snacking. If you're the type to eat a major meal while watching a television program (or an episode of anime) that's fine, just make sure that your portion is fixed beforehand. Place the food that you're going to eat into a container (bowl or plate) and set the portion; don't keep the larger supply of food nearby, and don't resupply. 3) Similar to tobacco addicts who are trying to quit smoking, identify triggers in your life and learn to avoid them. Do you watch cooking shows, and do those make you feel hungry? Stop watching them. Do you often find yourself bored, and then eat out of boredom? Get a hobby or find some other activity to occupy your time with. If you frequently eat out at restaurants with friends, try to find another activity that you and your friends can engage in. Eat to live, don't live to eat. 4) Eating out at restaurants is problematic, because your ability to control the portions is very difficult. In America this is a particularly large problem; when I was in Europe the food portions were quite small by comparison, but the issue likely remains. Have the discipline to only eat part of what is on your plate, and have the rest of the food wrapped up to bring home for a second meal if possible. Avoid buffet-style restaurants. 5) I touched on it briefly before, but you want to avoid binge eating or eating more heavily at certain meals than at others. A more regular schedule should also help you to determine what portion sizes you can tolerate for portion control, and to eat more slowly (it's near-impossible to eat slowly when you feel like you're starving). If you're having difficulty finding the time for full meals, or if smaller meals aren't lasting you through the day, then the advice is to eat smaller meals more frequently. In other words, snack. Portion control is important with snacks as well. I always carry two or three snack bars around the hospital (usually nut bars or "healthy cookies"), but I only use them if I've had to miss lunch or dinner. Nut bars aren't that difficult to make yourself, and of course there are a host of other snacks that you could use besides nut bars. Try to keep the snacks healthy, though, and try to avoid eating snacks as a supplement to your normal meals; if you need to take a snack, try to eat a little bit less during the remaining meals of the day to make up for it. 6) Eat healthy. You hear this one all the time, but it's true. As mentioned before, weight gain or loss is all about energy balance. A donut isn't very large but it's packed with energy and it tastes wonderful, which makes it likely that you'll eat it quickly and won't feel satiated (and will probably want to eat more). Vegetables (particularly lettuce) are excellent "fillers" - they'll provide you with vitamins, fiber, and modest energy while contributing to your sensation of feeling full. Good luck!
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2013-08-17, 16:56 | Link #258 | |
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2013-08-17, 19:25 | Link #259 | |
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