aging Definition and 93 Threads

what are the various causes of aging?

Is digestion related to heating and aging related to allowing the precipitate to sit?

i posted this in general forum. That might be wrong. So moderators, delete that not this. Q. why/how extremum time lapse between two events recorded on object's wristwatch gives the path of a free object. And any examples of minimum aging.

One can use the Principle of Extremal Aging to calculate the path of a freely moving body (in an inertial frame not subject to any forces) in spacetime, curved or flat. Why extremal? Why not just maximal? All the examples I know of involve maximum proper time for a freely moving body. For...

I know now I truly have a sex obsession. There is a bag lady that comes around collecting cans and bottles other people discard, for the refunds. What many people would call a bag lady or outcast from normal society. It's her only job as far as I can tell. Actually she must have been a real...

After a fairly long time of thinking I had a decent grip on the concept of time dilation, it has suddenly occurred to me that I don't. My issue is with the concept of the aging twins thought experiment (or whatever it's called) where if one shoots off at some comparable speed to the speed of...

What are the causes of human aging? Do we know all the causes of human aging?

DOWNER WARNING One of the most painful parts of growing older has been the loss of family. Perhaps the saddest part for me is that my siblings and I have grown apart. I'm only close with one of three now. Grandparents, uncles, aunts, cousins, and now one parent, are gone. Geography and time...

http://bigthink.com/ideas/25265

Does anybody know what mechanisms in the human body contribute to the wear and tear that comes with aging, and eventually lead to death? I know that DNA telomers shortening is one. What are some others? Maybe the accumulation of DNA mutations throughout a lifetime? Thanks!

Hi I am told that steam generator is an area that is suseptible to aging effects and corrosion. I was wondering if anyone can elaborate on this a bit. Is it just due to the heat and humididty? I am studying BWRs and safety and maintanced aspects and I was thinking of focusing on this area...

I'm kind of a noob who's posted a question or two here before to settle arguments and such. Please don't kill me if this has been covered before. I was reading some stuff about space travel trying to get some creative ideas for a sci/fi book idea I had. Nothing serious and really nothing to...

In a recent thread about differential aging in the archetypal twin scenario, I suggested that the periods of oscillators are affected by accelerations, or in other words that a clock's tick rate is affected by changes in its speed. This statement was disagreed with by some, who said that it...

Why do really fast speeds keep you from aging or "feeling time"? I started reading Orson Scott Card's "Speaker for the Dead" yesterday and I was struck by the fact that being able to communicate instantly with any point in the universe (as one can in Card's sci-fi world) is completely at odds...

Hello, I have been lately very interested in time dilation. I have found out many information about it and it's very interesting for me. But I have few problems I don't quite understand, so I will be glad for your help. Let's start: There's a man traveling in a spaceship from point A to...

This is some compelling new research... "A study led by researchers at the University of California, Berkeley, has identified critical biochemical pathways linked to the aging of human muscle. By manipulating these pathways, the researchers were able to turn back the clock on old human muscle...

Could somebody, possibly, provide a list of the mutations that cause aging- the specific mutations- "hotspots" and/or discuss that with me (ie you could pm me) thanks

So finally I can understand the time dilation principle. Correct me if I am wrong but here is how I understand it: If 2 twins on Earth conducted an experiment of time dilation, twin 2 hops into a rocket ship and flies around the Earth at a high rate of speed for years. When they meet up again...

Has there been any real scientific testing to determine the ratio of aging or decomposition of space junk above our atmosphere compared to atmospheric aging? I ask this because if space junk is going to be "out there" for millions of years as is, why would we even consider adding more in the...

http://www.dailymail.co.uk/sciencetech/article-1065867/The-miracle-machine-turns-cheap-plonk-vintage-wine--just-half-hour.html" I don't know enough about how wine ages to debate the above, but the following set the alarm bells off in my head: Mmm-hmm...

What genes cause aging, most people think shortening of telomeres is the main reason of aging, but I know there are more than that, like Klotho, Methuselah. But which fews are more important than others, and what else are there?

Hello, I was searching online for an equation which would reveal the effects on aging as velocities approach light speed. I found this t = squareroot of (1-(v^2/c^2)) Pardon my math ignorance (I am not a physics student) but when I entered in a velocity of 80% the speed of light the...

How much could suspended animation put the aging of mice on hold for? ie in this context? http://io9.com/371726/suspended-animation-now-possible-++-using-sewer-gas Would it do that at all? (if for example the mice had maintained telomeres)

Do germ line cells accumulate DNA Damage like the rest of the body? I've heard things about them that make them seem to have very different characteristics to the rest of the body. Ie could germ line cells, or anything, contain your original DNA when you're like 50 or 100, or would the only DNA...

Homework Statement You fly 5000 km across the United States on an airliner at 250 m/s. You return two days later traveling at the same speed. How much less have you aged more then your friends at home. Homework Equations I think the time dilation equation is used: delta_t= delta_t'/...

So would more copies of the SIR6 gene help reverse aging or anything like that if it's possible that deletion of the SIR6 gene speeds up aging a large amount? How dangerous would it be to have more copies of the SIR6 gene? If the mitochondrial theory of aging is correct, is there a way to...

Can you force older cells to express more delta protein? Would the cells expressing more delta protein be good or bad?

ckg733 the so-called "anti-aging molecule" - how to control aging? I've heard ckg733 be called the "anti-aging molecule" and apparently it can reverse aging of cells? Could this be used to reverse/stop the aging of an organism? I mean if you can control the age etc of every cell you could use...

Having read a whole lot of discussions about the "twin paradox" in this forum, I have a question that probably only serves to shine a bright light upon my ignorance... Clocks running slower at near-lightspeed, OK. Sounds reasonable. I'll buy that. But why does this mean that the...

I was seeing a documentary on amphetamines the other day and I was looking for a biological explanation for the accelerated aging that was apparent in the drug victims' faces. http://en.wikipedia.org/wiki/Crystal_meth#Effects It doesn't list my observation on Wikipedia...

Hey, I am by no means a physics expert so don't get on my for being somewhat uneducated in the topics of relativity but I have been trying to figure out many seemingly mind boggling questions lately and I was hoping some of you could help. First of all, as it is commonly stated that time...

I have heard of this principle before, but how can we show that it is true?

Does anyone have experience dealing with various threadlocking products and how age might affect the product? Along with this, I'd like to know if anyone has experience with batches getting mixed (i.e. 2 bottles being combined) or even reuse of a bottle by filling from a larger bottle. Thanks!

Well-aged beef is hung for as much as 30 days until it goes green. The green is scraped off and you have a very expensive, tasty piece of meat. Beef in my fridge goes off after a week or two and if I eat it I will get sick. What is the difference? I'm sure the first responses will talk...

Just a simple question for people knowledgeable in biology: what are some specific examples of determining someone's age by studying their body? I know you can use bones and teeth, and perhaps hair or something, but what specifically is it that the coronor, let's say, looks for to determine...

It might be worthwhile to discuss aging, or more importantly, healthy aging, in addition to longevity. http://en.wikipedia.org/wiki/Senescence http://www.senescence.info/ http://www.gen.cam.ac.uk/sens/...

I know very little about SR -- just the transformation equations I learned in high school. I remember reading somewhere that time dilation is a symmetric artifact of the synchronization convention, and that, by itself, it isn't the reason for differential aging. The reason, if I'm...

http://www.soundmedicine.iu.edu/segment.php4?seg=471 full article http://pn.psychiatryonline.org/cgi/content/full/40/1/27 better http://www.pnas.org/cgi/content/abstract/101/49/17312

I just read that "Even aging can't be so easily cured by replacing someone's whole body: our brain seems to contain the circuits causing us to age, and you'd just see the replacement aging very rapidly. (The circuits aren't just electrical but chemical too. And this experiment has even...

okay...i know that as DNA replicates, telomeres fall off/get shorter, and when they reach a certain point, the cell reaches senescence and can no longer replicate. I know that...but that's too simple. Is there more to it?...i.e. maybe anythign about when the cell reaches senescence, or any...

Hello people I wrote e little text to (try) explain non-expert people the reasons we age. I don't know if my point of view if correct, and so I would appreciate graduate student in genetics or biology take little time to read it and return here their comments about. I think there are more...

Aging is a result of evolution, not something selected by evolution, but something outside the selective powers of evolution. As research uncovers more and more about the mechanisms behind aging the exact nature of this fact is being realized more and more...

"I think we are knocking at the door of immortality," said Michael Zey, a Montclair State University business professor and author of two books on the future. "I think by 2075 we will see it and that's a conservative estimate." http://www.cnn.com/2003/HEALTH/07/19/aging/index.html