![]() ![]() ![]() These concern structure theories for manifolds. We sketch a sequence of developments in riemannian geometry which have taken place over roughly the last 50 years. Iteration-Complexity of Gradient, Subgradient and Proximal Point Methods on Riemannian Manifolds. The term as such is never used for non-intelligent species, however unearthly, though in TECHJARGON these may be. Intelligent races who are not EARTH HUMANS. Information about shipping policies for other countries can be found here: Payment and Delivery Information 2 In accordance with. The notion arose at once of Jupiter being covered by huge ammonia oceans. Its boiling point at atmospheric pressure is - 3. The temperatures on earth are such that ammonia exists as a gas. ![]() Liquid ammonia has almost as high a heat of evaporation, almost as high a versatility as a solvent, almost as high a tendency to liberate a hydrogen ion. ![]() Whereas the water molecule is made up of an oxygen atom and two hydrogen atoms (H2. Life fits water, rather than the reverse. This, however, is a false argument, since life has evolved to fit the watery medium in which it developed. Background first! So well fitted for life is it, in fact, that some people have seen in the nature of water a sure sign of Divine providence. In order to discuss life- not- as- we- know- it, let's change either the background or the feature players. No known life form on earth, however, can live in the complete absence of water, or fails to contain both protein and nucleic acid.). Life on earth almost certainly developed in an oxygen- free atmosphere, and even today there are microorganisms that can live only in the absence of oxygen. There are tissues in our body that can live temporarily in the absence of molecular oxygen, and there are microorganisms that can live indefinitely in the absence of oxygen. To be sure, it is the substance most characteristically involved in the mechanics by which most life forms evolve energy, but it is not invariably involved. For life- as- we- know- it, water is the indispensable background against which the drama is played out, and nucleic acids and proteins are the featured players. So we must strike beyond physiology and reach into chemistry, saying that all life is made up of a directing set of nucleic acid molecules which controls chemical reactions through the agency of proteins working in a watery medium. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |