CharonY

Moved to the homework area. Also it would help if you would just shortly copy the question in here instead of using a link. Spammers are everywhere.

Antioxidants are old news, too.

You should check whether the effect is reproducible. During evaporation CO2 and hence, buffer capacity gets lost. However, the proteins themselves are afaik not different enough to result in different pH (I would have to check the sequence to verify that, though). I would rather assume that it is essentially a problem of a non-buffered solution. Small difference of additives or even protein concentration can shift the pH easily.

There are a number of mechanisms and the majority is probably still unknown in detail. Most rely on certain gradient e.g. along developmental axes. One well-studied element is the chromatin state of Hox genes. See for instance: Howard Y. Chang, et al. Science 326, 1206 (2009), for a relatively easy to understand read on the topic.

Sustainable is missing somewhere!

Quantum solar organo femto-crystal dots.

Well evolutionary models can be derived on the gene level, which is done routinely. However, if you want to make population studies and derive for instance the chance of fixation, you will have to figure in fitness. The latter can only be achieved by measuring on the level of reproductive units, which generally means the whole organism. Even mobile genetic elements, which are as individual as possible when it comes to genes need a vehicle to persist through generations. Though of course the horizontal transfer can be measured with other metrics.

The single most important bit of advice is not to focus too much on the courses per se. In reality you will most likely already be a grad student before realizing what benefits you most. In many if not all cases there is no clear trajectory in which you can project where you will end up and what precisely you will need for a given project. A good foundation in all the basics is helpful, of course, but chances are, you will have forgotten a lot once you come to the point where you actually seriously need it. Having a good basis makes it easier to catch up, though. Finally the most important bit is to realize that grad school is not an end to itself. You will ask yourself where do you want to be in the end? Academia? Why? Or industry? Why? What other alternative? The PhD can be an entry ticket for something, but unless you just study pro arte, you should be sure that you are moving in the right direction.

Good to hear. And honestly, it is still early days. Generally you are doomed once you get your PhD (unless you made realistic career plans way ahead of that, which most don't).

If you want to discuss this, maybe you should start a new thread. There are a couple of things in this thread that are somewhat inaccurate, but I do not want to revive arguments from two years back.

Yes, indeed, they can be intermediates of amino acid degradation. Many bacteria have a more efficient way of utilizing amino acids, though. Instead of the Ehrlich reactions (and ending with alcohols) they go back via coA dervatives to fuel the TCA. Essentially in those that utilize amino acids also as C-source.

So let's see. Your problem is the connections of glucose and pyruvate? Well how do you go from glucose to pyruvate (essentially you answered it in your post yourself). Now pyruvate is well connected to other pathways. What is the central hub in biochemical pathways in almost all organisms? From there it is a relatively small step to find the intermediates to go all the way down to the various alcohols.

Probably you should read up on basic info about enzymes and proteins, as it is too broad to cover in one or two posts. However, depending on what they told you and whether you accurately quoted it, it seems that you may be confusing things about protein and non-protein enzymes. Conjugated enzymes are still proteins, even if they are coupled to something else. Non-protein enzymes are required to be free of peptides or proteins. This include, for instance, ribozymes, which are made from nucleic acids. Again, read up first on basics of proteins, then go to protein structures (including primary, secondary and tertiary structures). Enzymes are a subclass of proteins, which you should read up after that. And only after you got a grasp of it I would go to enzyme kinetics and equlibrium reactions.

Sounds boring and the replay value is probably pretty lousy. May have good graphics, though.

Ok, so you are aware what you actually measure with this method (carboxylic groups). How many free carboxylic group does e.g. an intact dipeptide possess. How many if it is hydrolyzed?

Yes, the trendline would be called "calibration curve", but otherwise you got the principle.

Cancer is at least partially related to dysregulation of a number of cellular functions including cell proliferation and differentiation.

And you believe that if the media find people who elaborate on why the narrative of the news outlet is wrong they will actually show it? In contrast to, say, people like, Dr. Oz who can sprout popular nonsense completely unopposed? Face it, the media only shows what people like to hear. That is their main purpose and not to educate people. Unless you start your own news outlet you cannot do much against that.

OK, so how do you prevent that? The news (especially, but not limited to the US) are more interested in narratives than in facts. So you (as a scientists) tell them something, carefully pointing out the caveats and they blow it out of proportion, or misinterpret it. You call them and say what they did was wrong and they shrug and tell you that it is old news anyway. Another thing is that very few media are interested in properly reporting science news to begin with. Of course one could preach that scientists should do more outreach (on top of the extremely busy schedule I should add), but on what platform? Blog it, with the hope that a few students may end up reading it?

If you mean whether there have been measurement of thermodynamic stability of wobble base pairs, then the answer is yes. The physical forces involved are essentially the same as for normal base pairing though the resulting geometries are slightly different.

The hypothesis was formulated in the 60s. Since then wobble base pairing has become an often observed and known phenomenon.

And also, when humans are involved often rigorous controlled environments are neither feasible nor desirable. In these cases even studies with thousands of subjects can see associations that are spurious or miss important clues because the sample composition obscures it. One will hardly find simple yes or no answers, but only mounting evidence for the one or the other. Over time. The WHO's job is to give recommendations based on the data that is currently available. If new data suggests adverse effects it would be foolish to ignore it. Yet they generally give rather cautious advise. The media is complete other thing, though.

More precisely, they have an additional regulatory mechanism, triggering contact inhibition.

Depends on what you want to talk about. Most of the time I use Powerpoint with a tablet notebook so that I can scribble when there is need (I tend to hand write formulas). It really depends on the topic, and audience, though.

How do you determine the pH of a dried substance?