mikedarwin

Actually, cryogenic vessels do not really fail, in the sense I think you mean, over time - with the notable exception of liquid helium and liquid hydrogen storage vessels. Liquid helium has bizzare effects of metal (in addition to quantum tunneling) causing high strength steel to embrittle over time. It is thoought that this occurs due to the presence of helium in solid solution in the metal subjected to loading, and being present at a temperature sufficiently low to form grain boundary cracks as a result of sliding along grain boundaries (which contain s... (read more)

Most of my childhood notes and cryo-memrobilia were lost when my house burned down in September, of last year. So, regrettably, I can't consult my notes from those experiments. However, as best I recall, the mortality rate in yeast frozen in distilled water was ~90%. No special treatment was required beyond removing them from the incubating medium and resuspending them in distilled water prior to freezing. Viability was determined indirectly by adding the frozen-thawed yeast in water to culture medium in an Erlenmeyer flask connected to a water displaceme... (read more)

My pleasure!

I have a few (hopefully helpful) comments to add. I am a huge advocate of trying things yourself on a do-able scale. For instance, many years ago I had pretty much the same idea you did and I decided to it out, directly. I lived across the street from a mechanical engineer from Eli Lilly, Inc., named Bud Riever. I asked Bud to figure how much prsssure would be developed if I simply cooled a closed steel container which was completely filled with water to well below the frrezing point? The answer was about 2,000 atmospheres, or about 24,000 psi... (read more)

I'd say FUNDAMENTALS OF CRYOBIOLOGY, followed by Baust's ADVANCES in BIOPRESERVATION. However, you may find another starting point better. I recently felt the need (out of self defense) to learn about dentistry. That's a bit like saying I decided to learn about neurosurgery:that covers a lot of ground. However, mostly what I was interested in was plain old restorative dentistry and the much more exotic implant dentistry. There are easily half a dosen textbooks on basic, restorative dentistry... After perusing a number, I settled on one as a proper "re... (read more)

I was asked by several people to comment on this post/proposal. Clearly, Maxikov put a lot of time and effort into this post and, at least in part, there's the pity. When you find you have an idea which seems at once compelling and obvious (in tems of the science) in an already well explored field, the odds are very good that you weren't the first to reach that conjecture. And that almost always means that there is someting wrong with your premises. Very smart and capable people have been trying to achieve cryopreservation of cells, tissues, organs and org... (read more)

Next up for discussions is the issue of "hyperonconicity." Just as cells require a certain "tonicity" (electrolyte concentration) to maintain their normal volume, tissues with capillaries require a certain concentration (and type) of large (macro-) molecules (colloid) to avoid accumulating water between the cells and becoming swollen, or edematous. Hyperonconicity refers to any solution that has more ability to hold water in the circulatory system (circulating blood or perfusate) than would be the case under NORMAL conditions. The key ... (read more)

As you can see from the CI data above and below, patient temperatures never come anywhere near -7 degrees, let alone the -20 degrees C called out in either the original animal research, or in CI's own publicly posted protocol for how cryoprotective perfusion is to be administered. In fact, it is necessary to look a number of case reports to even document that CI is perfusing its p atients with VM-1 chilled in a mechanical freezer: "Perfusion with CI−VM−1 vitrification solution began at 3:04 A.M. The CI−VM−1 was at freezer temperature (about −20ºC) in... (read more)

This Mickey Mouse operation results in perfusate that is at some (variable) subzero temperature when it is pumped through the perfusion circuit and delivered to the patient. While CI case reports are chaotic and inconsistent - some report temperature data during perfusion (http://www.cryonics.org/reports/CI97.html), some do not (http://www.cryonics.org/reports/CI75.html) - it is clear that even with the practice of pre-cooling the VM-1 perfusate in a freezer before perfusing it, CI patients never (so far as I can determine from published case reports, see... (read more)

This is a remarkable statement from Ben Best, and one that perhaps speaks best as to why CI is not a cryonics organization being run on a rational, scientific,or evidence based basis. When Ben Best writes: "There is no incompatibility between DMSO and PEG. The PEG make the solution hyperoncotic as the expected. My big mistake, and it was a bad one, I acknowledge, is that most of the vitrification solution was ruined because I was not aware that PEG would come out of solution when placed in a freezer," he is making a statement that has the follow... (read more)

Brian, when you say: "Mike, let's be fair about this. Veterinary surgeons for thoracic surgery (after loss of Jerry Leaf) and chemists for running perfusion machines were also used during your tenure managing biomedical affairs at Alcor two decades ago. You trained and utilized lay people to do all kinds procedures that would ordinarily be done by medical or paramedical professionals, including establishing airways, mechanical circulation, and I.V. administration of fluids and medications. Manuals provided to lay students even included directions for... (read more)

My comments about economic, social and political matters don't speak to how people should invest in the market, or to who will win the coming election. They speak to the general condition of the economy and the culture over the long haul. As I've observed in print before, plenty of people will get rich, and millions of people have gotten richer, despite the fact that diversion of wealth from the people who primarily produce it is at an all time high. I am the first to acknowledge that it has been fantastic advances in productivity that have made this possi... (read more)

Umm, here's a suggestion: WHY DON"T YOU JUST ASK ELIZER HOW AND WHY HE MADE THE DECISION? Why speculate?

This post from Max More is the kind of post that I would expect to see voted off of LessWrong. I have not had a substantive conversation with Max More about cryonics, let alone my personal position, psychology, desires or motivations in over 20 years. We did correspond recently, and I have asked Max for permission to make that complete correspondence, minus personal incidentals not material to cryonics, public. He has flatly refused. Why, I do not know, but I do know that that is the only substantive communication he and I have had in decades and that it i... (read more)

The first question you need to ask Yudkowsky (and yourself) is a damned difficult one to answer "simply," and that is what are the currently well known, well understood, and well documented BIOLOGICAL differences in outcome that are likely to pertain using the two different approaches in the reasonably optimum case. Reasonably optimum means that the member is experiencing medico-legal death under controlled conditions with competent cryonics organization personnel in attendance, My bet is that only a few people on the planet can answer that quest... (read more)

Yes, unquestionably some of the "information" that constitutes your person hood is in your gut, your glands, your immune system and your peripheral nervous system. However, your position would seem to imply that these things, and things much more central to your identity, such as your brain structure, are like unchanging books or artifacts on a museum shelf. They aren't. In fact, by the time you are 80, you will have lost roughly a third of your brain mass and your brain will be a tattered "remnant" of what it once was. You're now losi... (read more)

No, and that's the trouble! Because, you see, if cryonics were like any other medical procedure, I'd simply point to the STATISTICS and to the MAIMED and DEAD patients. In fact, the errors and screw ups would be a huge public scandal, because people would have SUFFERED and DIED. Indeed, the patients themselves (who were not killed outright) would be hollering to high heaven via every available media outlet. Cryonics patients never complain because they can't.

Because no cryonics patient suffers, or dies, or experiences any other OUTCOME of any kind, your ... (read more)

The major problems at Alcor are truly abysmal management, for which the Alcor Board of Directors is to blame, and lack of a professional culture and staff to administer the front end of cryopreservation. The situation is almost identical to one that would exist if the board of directors of a hospital tried to deliver medical services without physicians and nurses, but rather hired "the best they could find" to do these professionals' jobs. Thus, there might be a veterinarian doing cardiac and neurosurgery, a chemist operating the heart lung machi... (read more)

There's no mystery about why I have comparatively few criticisms posted about CI. My reasons for this are as follows:

1) Ci is what it is. What you see is pretty much what you get, and that this is so is evident from the discussion here. The perception of CI as a "mom and pop" outfit is but one example I could cite from this discussion. Ci does not project itself as using a medically-based model of cryonics. It's case histories are ghastly - and anyone who doesn't take the time to read them, or who can't see what the deficiencies are, well, you ca... (read more)

Melatonin has a very short half life and is secreted as needed by the pineal gland. It's apparent primary biological function is as a signal transduction/regulatory molecule. It's unclear if this function is what is responsible for its protective effect in ischemia-reperfusion injury (IRI), because melatonin is also a powerful radical scavenger - and in fact, a particularly effective scavenger of the radical species associated with neuronal injury in IRI, such as peroxynitrite. Other factors to consider are the timing, route of administration and dose use... (read more)