

CharonY
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Can eating hot food upset your stomach?
CharonY replied to Twinbird24's topic in Anatomy, Physiology and Neuroscience
I believe what you have read has involved liquid nitrogen http://www.nydailynews.com/news/world/birthday-cocktail-proves-deadly-18-year-old-article-1.1177421 Most likely badly processed. But for food that has been prepared with traditional means I would agree with the posters that damages would be mostly to mouth and esophagus. I.e. for something that is sufficiently hot to damage the stomach, it would also be damaging to mouth and esophagus. -
Considering that this is the internet, I am pretty certain that the worst possible explanation is the correct cone. Wife making a soup (at least the usual way) is not horrible enough.
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It is more a charade-type of game rather than riddle (except you are guessing a plot rather than a word).
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There is something to it with respect to the naked mole rat, but it is outside of my expertise. However it does not appear to be a simple genetic connection. Instead, unusual hyaluronans appear to be related to their resistance to cancer (see Tian et al. 2013 Nature doi:10.1038/nature12234). Also note that the genes implicated in cancer are part of the normal genetic system of the organism. If a genetic link is assumed, the absence of genetic element could as likely reduce cancer risk as the presence of one.
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You use conserved regions that are not specific to a specific species. You can easily find them with a quick lit search.
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PCR using appropriate primer for fungal species.
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For identification you do not sequence the genome, just diagnostic stretches. Typically rRNA genes are amplified and sequenced. Note that normally sequencing is not done on the chromosome either. Depending on system one would use sequencing vectors or add linkers to the fragments to be sequenced, for example. For these elements you would use standard sequencing primers.
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I am not sure how that goes with corruption, but assuming you mean ethical issues in a broader sense it is more a matter of which time frames you are looking at. Today's situation does not look that unique if you compare it to, say, mass internment of US-citizens of Japanese descent during WWII, human experimentation on Guatemalans in the 40s, McCarthyism, the eugenics movement which basically only stopped sometime during WWII, etc. With regards to warrantless wiretaps: and http://airccse.org/journal/ijmit/papers/1110ijmit03.pdf One could and should argue the scale, but that there are technological reasons for that. I.e. it simply was not that easy in former times. I would argue that the ethical landscape has not shifted that much but there may have been at least two major changes. One is the rise of very powerful conglomerates (though Eisenhower already warned about the "mitlitary-industrial complex" and potentially anti-corruption laws. If something that was illegal is somehow legal now, there must have been changes in regulation at some point. Also there may be a survivor bias. Maybe people just did not get caught or were reported on that often in former times?
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I believe we are talking about different points. My initial assumption (without data) was that most governments will exhibit corruption due to interconnections between elements of power. I believe your argument appears to be that a) it was not the case in the US until recently (for which I have not seen any data to substantiate) and b) that other countries do much better. I provided the link using the only metric that I could find that at least based on ranking there does not appear to be something fundamentally different between the US and other Western countries with similar forms of government. I think your arguments do not touch these points at all but are rather a rally to change the current situation (with a hint that it used to be better). To be fair, both of us have moved quite a bit off-topic so it would be fine to end the discussion at that point. Though it does intrigue me whether corruption has indeed risen significantly over the years and whether the Reagan years were indeed turning point of sorts. Why I like to go back to data and values is that anecdotes are good for opinion pieces, but do not necessarily reflect reality. One striking element that I could find that could back it up is that there appears to be a significant increase in revolving door issues (e.g. policy-makers becoming lobbyists, lobbyists serving as congressional staff members etc.). It should be noted that the EU is riddled with the very same issues. One interesting point would be to see whether that is really a novel development and where the roots are. For instance, have there been changes in regulations that would prohibited it earlier?
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But doesn't that lead back to the issue of how to quantify corruption? I.e. how much is perception and how is really quantifiable? The closest thing I could find is the corruption perceptions index, in which the US is ranked 19, which is close to the UK and Japan (17) but higher than France (22). If we used that values it is not that outlandishly different, but unfortunately the data collection only started 1996 http://www.transparency.org/cpi2012/results. It is certainly true that Canada (and Australia, as well as many Nordic countries) are ranked higher, but then it goes again to the question how much is the difference, really?
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what is the chemical substance which destroyed my banana ?
CharonY replied to fresh's topic in Applied Chemistry
Was it an individual banana or a bunch? I also wanted to point out that according to OP the taste was not off, just apparently not the ripeness as expected. Also, was it exposed to sunlight and at which temperature? Also was the banana still green when bought? Most bananas are usually ripened past that point, i.e. they are sold while still firm, but should not have a strong raw taste to them. In ripening chambers the process takes about a week (from green to early ripeness). However, there the bananas are stacked in close proximity and exposed to defined doses of ethylene. Keeping them individually and unconfined will delay the ripening process (as they emit ethylene themselves). Obviously, if you really are interested, you would have to conduct some more experiments and monitor the results more closely as categories such as "too firm" are usually not terribly helpful. -
what is the chemical substance which destroyed my banana ?
CharonY replied to fresh's topic in Applied Chemistry
I am also unaware of chemicals with that properties. Only recently a coating was proposed that would delay rotting, but the standard way is to increase/restrict access to ethylene. But from your description your taste changes only in ripeness and is not indicative of the use of some mystery chemicals. There are several ways to increase or slow the ripening process, e.g. sealing them in a bag, add pear or apple etc, so the ripening time will be also dependent on the way you store them. To me, 9 days starting from a green banana does not sound terribly odd. -
what is the chemical substance which destroyed my banana ?
CharonY replied to fresh's topic in Applied Chemistry
Is it possible that you got plantains? -
While we are discussing that in terms of US government, I am pretty sure that pretty much the same is true for basically all governments. Strong networks are the basis of power, but also of corruption.
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These are pretty much my feelings, too. Things like blatant lies and hypocrisy are relatively easy to spot, but corruption is quite a different matter. Moreover, I suspect the entanglement between influential groups and politics is so tight that many things that one may perceive as corrupt are commonplace and in fact part of the normal policy-making process. When comes to this I would also assume that the depth of entanglement does likely correlate with political influence rather than party, as one is dependent on the other to a large extent.
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I am wondering, is there any metric that would quantify that? Maybe in terms of donations volumes, for example.
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New tech enables crops to take nitrogen from the air
CharonY replied to EdEarl's topic in Science News
Hm, I kind of missed that it is about non-rhizobial diazotrophic bacteria. That is slightly somewhat less exciting as to my (potentially outdated) knowledge the fixation rate is far lower (probably due to more limited nutrient exchange and unfavorable pO2 levels). I remember faintly that there was quite a discussion whether some of the observed yield increase were really due to nitrogen fixation or an enhanced ability to take up nutrients from soil in presence of bacteria. In any case the results were significant, but the effect size was not huge, especially compared to rhizobia. Getting these endophytes in a way that they immediately colonize the plant is probably a clever thing as they tend to get outcompeted so easily from root surfaces and soil, but I assume there will still be quite a significant need of other forms of fertilization. I would be somewhat surprised if the reduction in fertilizer would be huge. -
I think most parents to some degree accept the fact that their kids are going to live their own life at some point. Being a parent is and should be a bit selfless. As a parent you get to create and form a person and that itself could pretty much be reward enough (and you are passing on your genes, if you are into that....) If you only have a child to for your entertainment, you are probably better off with a pet. Also, I think a relationship in which someone cares more about his/her parents than his/her own family is not necessarily very healthy. Priorities pass on from one generation to the next and I think this is something that most parents understand well.
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In addition to what swansont pointed out, the values you found are likely to be recommended values, not minimum requirements. So going for two weeks under the value would not necessarily impact weight immediately. But I would also assume that the biggest factor here is incorrect calorie intake assessment.
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So he thought he ate turtle but did not? And his wife is involved? Is she at the, ehm very source of a culinary misstep? In any case, I have the feeling that this is more an example of convoluted story-telling rather than a true riddle, as the premises allow for almost unlimited number of "correct" answers. Just saying.
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New tech enables crops to take nitrogen from the air
CharonY replied to EdEarl's topic in Science News
Symbiosis and parasitism are very similar in many ways. Both need to overcome host defense responses (plant defenses are generally not considered immune system, as they are functionally very different). But it is more just an infection, in root nodules (formed by the plants) they create a low-oxygen environment for the bacteria. who start differentiating into a nitrogen fixing form (bacteroid). Subsequently there is an extensive nutrient exchange between host and symbiont, which involves a very complicated interplay. The claim that this was successfully transferred between non-host systems is very bold (and amazing, if true). -
Eh, what? Other than dyslexia, how was that connection made?
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I would say that this is pretty much overwhelming evidence.
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New tech enables crops to take nitrogen from the air
CharonY replied to EdEarl's topic in Science News
Unfortunately I am unable to find any original papers (patent issues?) as the article is a bit strange. As mentioned, nitrogen fixation is nothing new per se, legume symbiosis is known very well and has been used in one for or another for a long time (e.g. crop rotation). That being said the biggest claim here is that they report a method that allows nitrogen fixation in all major crops. That would be very big news since nitrogen-fixing symbiosis is only found in a few non-legumes and we do not even know all the mechanisms yet. Transferring effective nitrogen fixation to non-legume crops have always been the holy grail of nitrogen fixation research and I am really surprised that there is now a claim for a major breakthrough with almost no paper trail. I really wonder how much of it is usual journalistic exaggeration and how much is true. E.g. if the method is really "just" an improved way to induce symbiosis or increase the efficiency of the symbiosis (both of which are would be pretty interesting, too). -
Am I too old to follow my dream and become a scientist?
CharonY replied to theroamingnomad's topic in Science Education
Networking is indeed key. One thing that I would like to add to Trimidity's anecdote, a postdoc is usually on soft money in form of grants or similar. Thus, depending on the overall lab situation losing one or two rounds of grants may result in termination. Not very attractive when you are in your 40s and have a family. In some institutions there are a handful of permanent research scientist positions, but they are very, very rare. One thing to consider is also the financial situation, if it is insecure I would be careful about an academic career. I have no personal experience with the UK system and have to rely on what my colleagues from there tell me, but a PhD (which is required for an academic career), is likely to take about 8-9 years. But even so, only after the PhD the search for an academic career actually starts. In biology we are looking at almost a minimum of 4 years of post-doc, usually with very low salary. but even 6 to 8 years are not that uncommon to get a lecturer position. In the US that would be a tenure-track position (assistant prof), from my understanding in the UK the position would be open ended. So if everything works perfectly it is likely to take more than 15 years to secure a position. But one thing to keep in mind is that there are not that many positions to begin with. The majority of postdocs will not get an academic position (though luckily most eventually find other employment, e.g. in industrial positions, at least in my field). The average academic position (tenure track) has about 200 applicants, for example. In order to get that position you need more than a little bit of hard work and giant chunk of luck (though a strong network will optimize the latter). I am not trying to be too negative here, but the point is that even if everything is done correctly and one graduates on top, the chances of securing a career are bad to begin with. To give a number, before the economic crisis less than 20% of all PhDs staying in academia got tenure but that number is likely to be lower by now. I would not even think that age is the biggest challenge here, although it does not make things easier. A potentially better choice is too look for jobs outside academia on the masters level, e.g. as analyst or technician. Especially if you bring real-life experience outside of academia to the table you will look more attractive than the 20-something who has not stepped outside of school yet.