Heart cells are a specialized form of muscle cell, not smooth muscle cells. According to your article they think they are seeing stem cells reproducing, not cardiac muscle cells.
The next challenge, according to Anversa, is to find the source of the dividing myoctyes. "Are these cells a sub-population of known cells that retain the capacity to divide, or are they multiplying cells that originate from stem cells present in the heart?" he asks.
"There are preliminary indications that primitive cells like stem cells exist in the human heart. Stem cells may have the ability to develop into the various cardiac cell types and form new healthy functioning myocardium. If we can prove the existence of cardiac stem cells and make these cells migrate to the region of tissue damage, we could conceivably improve the repair of damaged heart muscle and reduce heart failure," says Anversa.
Not all cells from multicellular organisms are still able to divide, though. Once the heart is full sized, the heart cells in a human body do not divide anymore. They no longer have that ability. When a person has a heart attack and some heart cells die, the heart is permanently damaged the heart can't just replace those dead cells.
According to Doris Taylor (Departments of Medicine and Surgery at Duke University Medical Center. She did post-doctoral work in cardiac (heart) molecular biology at Albert Einstein College of Medicine in New York.)
The heart cannot repair the damaged muscle because its muscle cells cannot reproduce, Doris explains. You are born with all the heart cells you will ever have. Your heart grows because the cells become larger, not because they multiply. However, other muscles do have the ability to repair themselves because they contain cells called myoblasts, which can reproduce.
It is a good thing they weren't around to do business in Pol Pot's Cambodia. "We had no choice, we couldn't do business there unless we helped them kill all the intellectuals."
Thank goodness for MAME. Now I can play through all of those arcade games that were designed to eat quarters. To beat most of those games you had to play constantly and memorize patterns, something that gets boring fast.
Speed Racer has everything I want in a cartoon, a heroin addicted chimp (look at those scary red ringed eyes), a driving instructor from Tibet, a car than can drive on boulders, and Speed himself who never seems to remember to check the trunk of his car before a race.
- There are a few gases like CO that we can't smell and that would kill us. Why didn't "God" design us in a way so we can smell them? A practical joke mayhaps?
Strangely enough we have hundreds of latent genes for smell that aren't expressed in our chromosomes. It seems the genes for our hightened sense of sight are more valuable to a tree dweller than smell.
I'd also add to that list why we can't produce our own vitamin C and have to obtain it from our diet (same goes for apes). Many other organisms can produce it internally. Without it we can't produce collagen and many hormones and end up with scurvy. There is also the matter of hernias that result from walking upright with an abdominal cavity designed for walking on all fours (we were created to walk upright, right?).
- What kind of engineer puts the pleasure center of the body inches away from sewers?
If you only mean visible light then this breakthrough has you covered!
The beauty of the device is that it can produce the whole spectrum of colours, even ultraviolet and infrared light
Discuss network security (or even network basics) with non techies and watch their eyes glaze over and their jaws drop. Remember to use all of those abbreviations to obfuscate the subject even more.
I'd say it is more like an open field with no fences, no signs, nutt'n saying "stay out". Technically you'd be trespassing but no reasonable judge would ever uphold that in the face of the circumstances.
I think some tvs (and you can add it to your system) have volume regulators that will keep the sound within narrow limits.
I heard a person on the radio talking about this once and they said that the FCC set limits on the max loudness so broadcasters will play a show at its normal lower volume (or purposefully lower it) and they play the commercial at the max allowed.
Just a sample of their recommendations for travelers to Mars based on their simulation:
- Seals would be a valuable food source - Canadian TV is available - You'll need skis and a boat to get there - Igloos can be substituted for prefab shelters - If you need water don't worry, it'll rain/snow occasionally
Pivar would also likely be considered a public figure because he has promoted this book and written articles for the New York Times. Public figures have even tighter standards for what is considered libel than a nonpublic person.
Are there PV materials that are transparent (or close to it) outside of their bandgap? If so it would be interesting to take a page from nature. Many animals (i.e. cats) have a reflective layer behind the retina that gives the neurons a 2nd chance to absoarb the photons they missed. If it hasn't been tried already, maybe a cell could be designed with the PV layer on top, a layer of "converter particles" for coverting photons into the desired bandwidth under it, and a reflective layer on the bottom. That way any photons missed by either layer or emitted in the wrong direction by the nanoparticle layer would have a 2nd chance to be absoarbed.
I just did a quick and dirty calculation of a 3-4kw home system and it showed that it would take approx 40 years to pay for itself based on electricity prices in my area. Now since electricty prices will probably go up over time, and the money I spent on the PV system is a one time investment, that number is actually going to be smaller. Still, even 30 years is longer than the 25 year lifetime I see for most PV systems.
From a practical perspective, since this is a very thin nanoparticle film would it be possible to clean off these cells without damaging the film? And if you put a protective coating over the nanoparticle film would you lower the efficiency by doing so? Just look at the mars rovers for examples of how dust accumulation on cells can be a problem.
Slashdot Mirror
"There are preliminary indications that primitive cells like stem cells exist in the human heart. Stem cells may have the ability to develop into the various cardiac cell types and form new healthy functioning myocardium. If we can prove the existence of cardiac stem cells and make these cells migrate to the region of tissue damage, we could conceivably improve the repair of damaged heart muscle and reduce heart failure," says Anversa.
Cardiac muscle cells, however, do not reproduce after a certain point:
Not all cells from multicellular organisms are still able to divide, though. Once the heart is full sized, the heart cells in a human body do not divide anymore. They no longer have that ability. When a person has a heart attack and some heart cells die, the heart is permanently damaged the heart can't just replace those dead cells.According to Doris Taylor (Departments of Medicine and Surgery at Duke University Medical Center. She did post-doctoral work in cardiac (heart) molecular biology at Albert Einstein College of Medicine in New York.)
The heart cannot repair the damaged muscle because its muscle cells cannot reproduce, Doris explains. You are born with all the heart cells you will ever have. Your heart grows because the cells become larger, not because they multiply. However, other muscles do have the ability to repair themselves because they contain cells called myoblasts, which can reproduce.Correct me if I'm wrong but I thought human heart cells couldn't reproduce?
I hope he tells them he plans on reincarnating as a Chinese Communist boss just to ruin them.
It is a good thing they weren't around to do business in Pol Pot's Cambodia. "We had no choice, we couldn't do business there unless we helped them kill all the intellectuals."
This isn't necessarily a good thing you know. It's why we have redundancy in RAIDs.
Thank goodness for MAME. Now I can play through all of those arcade games that were designed to eat quarters. To beat most of those games you had to play constantly and memorize patterns, something that gets boring fast.
It is a good thing I added a lead foil hat to my tin foil one.
Steve Albini has even already written a catchy theme song for the movie.
I prefer to have the subject circled with a big red arrow pointing at it.
Strangely enough we have hundreds of latent genes for smell that aren't expressed in our chromosomes. It seems the genes for our hightened sense of sight are more valuable to a tree dweller than smell.
I'd also add to that list why we can't produce our own vitamin C and have to obtain it from our diet (same goes for apes). Many other organisms can produce it internally. Without it we can't produce collagen and many hormones and end up with scurvy. There is also the matter of hernias that result from walking upright with an abdominal cavity designed for walking on all fours (we were created to walk upright, right?).
- What kind of engineer puts the pleasure center of the body inches away from sewers?As the old joke goes, clearly God is a civil engineer. ;) It could be worse, birds shit and pee out the same tube they use for sex.
This is what happens when you forget to take the lens cap off.
This is what happens when God takes a day off to rest during creation.
Discuss network security (or even network basics) with non techies and watch their eyes glaze over and their jaws drop. Remember to use all of those abbreviations to obfuscate the subject even more.
And I would enjoy spying on what sites my neighbors were visiting while using my bandwidth. ;)
I'd say it is more like an open field with no fences, no signs, nutt'n saying "stay out". Technically you'd be trespassing but no reasonable judge would ever uphold that in the face of the circumstances.
Now they'll be able to open pickle jars.
I think some tvs (and you can add it to your system) have volume regulators that will keep the sound within narrow limits.
I heard a person on the radio talking about this once and they said that the FCC set limits on the max loudness so broadcasters will play a show at its normal lower volume (or purposefully lower it) and they play the commercial at the max allowed.
D'Arcy_Thompson's bio.
Excepts from his book "On Growth and Form"
Just a sample of their recommendations for travelers to Mars based on their simulation:
- Seals would be a valuable food source
- Canadian TV is available
- You'll need skis and a boat to get there
- Igloos can be substituted for prefab shelters
- If you need water don't worry, it'll rain/snow occasionally
And Pivar's relationship to Steven Gould.
It looks like his main field of expertise is art.
Are there PV materials that are transparent (or close to it) outside of their bandgap? If so it would be interesting to take a page from nature. Many animals (i.e. cats) have a reflective layer behind the retina that gives the neurons a 2nd chance to absoarb the photons they missed. If it hasn't been tried already, maybe a cell could be designed with the PV layer on top, a layer of "converter particles" for coverting photons into the desired bandwidth under it, and a reflective layer on the bottom. That way any photons missed by either layer or emitted in the wrong direction by the nanoparticle layer would have a 2nd chance to be absoarbed.
I just did a quick and dirty calculation of a 3-4kw home system and it showed that it would take approx 40 years to pay for itself based on electricity prices in my area. Now since electricty prices will probably go up over time, and the money I spent on the PV system is a one time investment, that number is actually going to be smaller. Still, even 30 years is longer than the 25 year lifetime I see for most PV systems.
From a practical perspective, since this is a very thin nanoparticle film would it be possible to clean off these cells without damaging the film? And if you put a protective coating over the nanoparticle film would you lower the efficiency by doing so? Just look at the mars rovers for examples of how dust accumulation on cells can be a problem.