7 results found.
... Science Frontiers ONLINE No. 117: May-June 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects More Disorder Here Produces Order There Physicists use the word "entropy" to describe the well-observed tendency of the universe to run down; that is, become more disorderly. In some situations, though, the increase in disorder (entropy) in one part of the universe can create order elsewhere. For example, if you add tiny plastic spheres of two sizes to salty water, you will not get a uniform mixture. Instead the larger spheres will pack together into tightly ordered crystaline shapes (representing more order) while the smaller spheres become more disordered. It is like watching cream unstir itself from coffee. It smacks of magic, but it is all within the laws of thermodynamics. This strange "force" exerted by entropy may explain some puzzling biological phenomena, such as the expulsion of nuclei from mammalian red blood cells before they enter the bloodstream as sacks of hemoglobin. The idea being that the increasing entropy of the proliferating hemoglobin molecules (analogous to the smaller spheres) is maximized when the nuclei (large spheres) are squeezed out of the cells altogether. (Kestenbaum, David; "Gentle Force of Entropy Bridges Disciplines," Science, 279:1849, 1998.) Comments. The red-blood-cell example presented in the article is on shaky ground, because while mammalian red blood cells do lack nuclei those of birds and reptiles retain theirs. (See BMC6 in Mammals II .) In ...
Terms matched: 1 - Score: 113 - 15 May 2017 - URL: /sf117/sf117p14.htm
... Science Frontiers ONLINE No. 24: Nov-Dec 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Islands Of Hope For Life Eternal Frautschi examines expanding "causal" regions in the universe, where entropy (disorder) does not increase as fast as the maximum predicted by Thermodynamics. The conclusion of this highly theoretical paper is that, even in these "islands of hope," life and the order it requires cannot survive indefinitely if it is restricted to solid substances. But, ". .. it stands as a challenge for the future to find dematerialized modes of organization (based on dust clouds or an e- e+ plasma?) capable of self-replication. If radiant energy production continues without limit, there remains hope that life capable of using it forever can be created." (Frautschi, Steven; "Entropy in an Expanding Universe," Science, 217:593, 1982.) Comment. Who said Science was a conservative journal? This smacks of scifi tales of electrolife and Hoyle's Black Cloud. From Science Frontiers #24, NOV-DEC 1982 . 1982-2000 William R. Corliss ...
Terms matched: 1 - Score: 29 - 15 May 2017 - URL: /sf024/sf024p06.htm
... by recent evidence that protons, long con sidered immortal, may after all decay. The consequences of proton decay are even more dismal than the dire predictions of thermodynamics: "Perhaps the most disturbing piece of speculation to come out of theoretical physics recently is the prediction that the whole universe is in decay. Not only do living things die, species go extinct, and stars burn out, but the apparently immutable protons in the nucleus of every atom are slowly dissolving. Eventually -- in more than a quadrillion years -- nothing will be left of the universe but a dead mist of electrons, photons, and neutrinos." (Flam, Faye; "Could Protons Be Mortal after All?" Science, 257:1862, 1992.) The death of memory. With increasing entropy and decaying protons on their minds, it comes as no surprise that physicists likewise believe that when one dies, that's it . An afterlife is impossible. How do physicists conclude this? In a letter to the American Journal of Physics, J. Orear proffered an interesting sort of "proof": "One such proof: human memory is stored in the circuitry of the brain and after death this circuitry completely decomposes." But not all physicists were satisfied with this simplistic view. In a follow-on letter, J.B .T . McCaughan asked how Orear knew that memory is limited to the brain's neuron circuitry. Perhaps there is something that the reductionists are missing. McCaughan then states that Orear's assertion would be negated if people really did ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf085/sf085u14.htm
... gas wells The fact that the composition of petroleum is not what one would expect from the decomposition of plants and animals. It is really a mixture of primordial hydrocarbons with some added biochemical by-products; that is, products of that "deep" biosphere. Since carbonaceous material is now known to be common in the solar system (comets, carbonaceous chondrites, etc.), it is likely that many other planets also possess deep stores of hydrocarbons. In these deep, warm, protected, energyrich "wombs," complex biospheres might readily evolve. In Gold's view, deep biospheres may be the rule and surface life the exception! Finally, Gold sees life as merely a natural process with no more meaning and purpose than accelerating the breaking of chemical bonds and thereby increasing entropy! "It has been said that nature abhors a vacuum, but nature doesn't care much for free energy either. All of biology is just a device for degrading energy from chemical sources, and on the surface from the great temperature differential between the hot sun and the cold of space. Perhaps biology is just a branch of thermodynamics, and there is no sudden beginning of life, but a gradual systematic development toward more efficient ways of degrading energy. .. .The chemical energy available inside a planetary body is then more likely to have been the first energy source and surface creatures -- like elephants and tigers and people -- which feed indirectly upon solar energy are just a specific adaptation of that life to the strangely favorable circumstances on the surface of our planet. ...
Terms matched: 1 - Score: 14 - 15 May 2017 - URL: /sf114/sf114p06.htm
... in your PC. These tiny, DNA-based biological logic circuits determine how genes are interpreted (each gene may be interpreted in several ways), and, in the end, how lifeforms develop from embryo to adult. (Yuh, Chiou-Hwa, et al; "Genomic CisRegulatory Logic: Experimental and Computational Analysis of a Sea Urchin Gene," Science, 279:1896, 1998. Also: Wray, Gregory A.; "Promoter Logic," Science, 279:1871, 1998.) Comment. Figuring out how your PC's hardware evolved is child's play compared to elucidating just how random mutation and natural selection evolved the thousands of different logic circuits switching on and off in your body as you read this. It's all due to entropy! The complexity of biological computers is seen in the logic circuits of a promoter for the gene Endo 16. (From: Science, 279:1871, 1998). Computer-carrying sea urchin. Sharp in more ways than one! From Science Frontiers #117, MAY-JUN 1998 . 1998-2000 William R. Corliss ...
Terms matched: 1 - Score: 14 - 15 May 2017 - URL: /sf117/sf117p15.htm
... The groundbreaking experiment was carried out onboard the Mir space station last year as part of the French-Russian Perseus mission. By warming a copper-and sapphire-walled cell filled with a drop of liquid sulfur hexafluoride and one tiny bubble of gaseous sulfur hexafluoride in near-zero gravity, scientists triggered a slight compression of the bubble. That gentle squeeze raised the temperature of the gas above that of the cell walls. For this to happen, heat must have been transferred from the cooler walls to the hotter gas, scientists report in the 1 May Physical Review Letters. This weird phenomenon can be tossed off as a "transient temperature overshoot." The Second Law didn't really apply because the system was not in thermodynamic equilibrium. Also, the Second Law really concerns changes in entropy rather than temperatures. (Sincell, Mark; "Backward Heat Flow Bends the Law a Bit," Science, 288:789, 2000.) From Science Frontiers #130, JUL-AUG 2000 . 2000 William R. Corliss Other Sites of Interest SIS . Catastrophism, archaeoastronomy, ancient history, mythology and astronomy. Lobster . The journal of intelligence and political conspiracy (CIA, FBI, JFK, MI5, NSA, etc) Homeworking.com . Free resource for people thinking about working at home. ABC dating and personals . For people looking for relationships. Place your ad free. ...
Terms matched: 1 - Score: 14 - 15 May 2017 - URL: /sf130/sf130p13.htm
... to be filaments threading the surfaces of cosmic bubbles (voids). It seems to be slow-moving and cold (no electromagnetic radiation), but no one really knows what it is. Apparently, it constitutes 30% of that part of the universe that we have so far detected. (We are doing a lot of guessing here!) Are all the baryons assembled in galaxies? Baryonic matter includes protons, neutrons, and electrons. Baryons should be abundant in intergalactic space, but they are nowhere to be found. What is the dark energy? Whatever it is, scientists have so far only been able to name it. It is thought to be associated with a repulsive force that is accelerating the expansion of the universe. What is the destiny of the universe? Will entropy do us in? (Sincell, Mark; "The 8 Greatest Mysteries of Cosmology," Astronomy, 29:46, June 2001.) Comments, It is easy to add to the above list: (1 ) Why does anything exist? (2 ) Is there life elsewhere in the universe? (3 ) Are redshifts really good yardsticks? (4 ) Are there other universes, as distinct from the other dimensions mentioned above? From Science Frontiers #138, NOV-DEC 2001 . 2001 William R. Corliss Other Sites of Interest SIS . Catastrophism, archaeoastronomy, ancient history, mythology and astronomy. Lobster . The journal of intelligence and political conspiracy (CIA, FBI, JFK, MI5, NSA, etc) Homeworking.com . Free resource for people thinking ...
Terms matched: 1 - Score: 13 - 15 May 2017 - URL: /sf138/sf138p02.htm
