Uitvinder 'oersoep' Stanley Miller overleden
Op zondag 20 mei 2007 is op 77-jarige leeftijd de beroemde scheikundige Stanley Miller overleden, de uitvinder van de "oersoep". Dat heeft de Universiteit van San Diego bekendgemaakt.
Miller publiceerde in 1953 in het wetenschappelijke vakblad Science een artikel over een ondertussen klassiek geworden experiment, aantonend dat aminozuren, de scheikundige bouwstenen van het leven, kunnen ontstaan uit natuurlijke omstandigheden zoals die heersten in de oertijd. De destijds 23-jarige Miller suggereerde dat de basis van het leven op Aarde werd gevormd in een soort oersoep, vier miljard jaar geleden.
Miller bootste als student in zijn experiment de oeratmosfeer na, compleet met bliksem en regen. In een proefopstelling verwarmde hij een mengsel van methaan, ammoniak, waterdamp en waterstof - de samenstelling van lucht in de oertijd. Door het mengsel met elektrische ontladingen te bestoken, bootste Miller de bliksem na.
Daarna werd het mengsel door een koelbuis geleid om het 'als regen' te laten condenseren. De vloeistof werd ten slotte weer opgewarmd en verdampt, waarna het hele proces weer opnieuw begon.
Miller liet de reactie een week lang doorgaan en vond allerlei organische moleculen in het mengsel. Vooral de aminozuren glycine en alanine waren in het mengsel op te sporen. Deze aminozuren zijn belangrijke bouwstoffen voor eiwitten, en dus voor het leven op onze planeet.
Bron:
www.tijd.be
www.trouw.nl
Uitvinder 'oersoep' Stanley Miller overleden
Moderator: Moderators
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Theoloog
Hoe moet je een dergelijk experiment dan noemen als de logische gevolgen ervan strijdig zijn met wat geacht wordt de goddelijke waarheid te zijn?Theoloog schreef:Is dit dat 'mislukte' experiment waar crea-christenen naar verwijzen, van wetenschappers die geprobeerd hebben het ontstaan van het leven na te bootsen?
Eigenlijk vind ik het nog niet eens zo'n mislukte poging.
De achtste hemel is het atheïstische inzicht dat de werkelijkheid weliswaar hard is maar wel de werkelijkheid en die is zoveel waardevoller dan alle mooie, verzachtende sprookjes bij elkaar. (Gerard)
Geleid wordt enkel hij die zichzelf niet gevonden heeft. (Rereformed)
Geleid wordt enkel hij die zichzelf niet gevonden heeft. (Rereformed)
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Theoloog
Zoals op deze ID-site (herkenbaar als ID vanwege het gebruik van concepten als 'irreducible complexity' en 'informatietheorie'). Hun voorstelling van zaken is iets anders dan die van Animal. Volgens deze website bleven er na de experimenten slechts een handjevol dode moleculen.
"The most generally respected study on the origin of life is the Miller experiment conducted by the American researcher Stanley Miller in 1953. (The experiment is also known as the "Urey-Miller experiment" because of the contribution of Miller's instructor at the University of Chicago, Harold Urey.) This experiment is the only "evidence" evolutionists have with which to allegedly prove the "chemical evolution thesis"; they advance it as the first stage of the supposed evolutionary process leading to life. Although nearly half a century has passed, and great technological advances have been made, nobody has made any further progress. In spite of this, Miller's experiment is still taught in textbooks as the evolutionary explanation of the earliest generation of living things. That is because, aware of the fact that such studies do not support, but rather actually refute, their thesis, evolutionist researchers deliberately avoid embarking on such experiments.
Stanley Miller's aim was to demonstrate by means of an experiment that amino acids, the building blocks of proteins, could have come into existence "by chance" on the lifeless earth billions of years ago. In his experiment, Miller used a gas mixture that he assumed to have existed on the primordial earth (but which later proved unrealistic), composed of ammonia, methane, hydrogen, and water vapor. Since these gases would not react with each other under natural conditions, he added energy to the mixture to start a reaction among them. Supposing that this energy could have come from lightning in the primordial atmosphere, he used an electric current for this purpose.
Miller heated this gas mixture at 100°C for a week and added the electrical current. At the end of the week, Miller analyzed the chemicals which had formed at the bottom of the jar, and observed that three out of the 20 amino acids which constitute the basic elements of proteins had been synthesized.
This experiment aroused great excitement among evolutionists, and was promoted as an outstanding success. Moreover, in a state of intoxicated euphoria, various publications carried headlines such as "Miller creates life." However, what Miller had managed to synthesize was only a few inanimate molecules.
Encouraged by this experiment, evolutionists immediately produced new scenarios. Stages following the development of amino acids were hurriedly hypothesized. Supposedly, amino acids had later united in the correct sequences by accident to form proteins. Some of these proteins which emerged by chance formed themselves into cell membrane-like structures which "somehow" came into existence and formed a primitive cell. These cells then supposedly came together over time to form multicellular living organisms.
However, Miller's experiment has since proven to be false in many respects."
http://www.darwinismrefuted.com/molecul ... gy_09.html
"The most generally respected study on the origin of life is the Miller experiment conducted by the American researcher Stanley Miller in 1953. (The experiment is also known as the "Urey-Miller experiment" because of the contribution of Miller's instructor at the University of Chicago, Harold Urey.) This experiment is the only "evidence" evolutionists have with which to allegedly prove the "chemical evolution thesis"; they advance it as the first stage of the supposed evolutionary process leading to life. Although nearly half a century has passed, and great technological advances have been made, nobody has made any further progress. In spite of this, Miller's experiment is still taught in textbooks as the evolutionary explanation of the earliest generation of living things. That is because, aware of the fact that such studies do not support, but rather actually refute, their thesis, evolutionist researchers deliberately avoid embarking on such experiments.
Stanley Miller's aim was to demonstrate by means of an experiment that amino acids, the building blocks of proteins, could have come into existence "by chance" on the lifeless earth billions of years ago. In his experiment, Miller used a gas mixture that he assumed to have existed on the primordial earth (but which later proved unrealistic), composed of ammonia, methane, hydrogen, and water vapor. Since these gases would not react with each other under natural conditions, he added energy to the mixture to start a reaction among them. Supposing that this energy could have come from lightning in the primordial atmosphere, he used an electric current for this purpose.
Miller heated this gas mixture at 100°C for a week and added the electrical current. At the end of the week, Miller analyzed the chemicals which had formed at the bottom of the jar, and observed that three out of the 20 amino acids which constitute the basic elements of proteins had been synthesized.
This experiment aroused great excitement among evolutionists, and was promoted as an outstanding success. Moreover, in a state of intoxicated euphoria, various publications carried headlines such as "Miller creates life." However, what Miller had managed to synthesize was only a few inanimate molecules.
Encouraged by this experiment, evolutionists immediately produced new scenarios. Stages following the development of amino acids were hurriedly hypothesized. Supposedly, amino acids had later united in the correct sequences by accident to form proteins. Some of these proteins which emerged by chance formed themselves into cell membrane-like structures which "somehow" came into existence and formed a primitive cell. These cells then supposedly came together over time to form multicellular living organisms.
However, Miller's experiment has since proven to be false in many respects."
http://www.darwinismrefuted.com/molecul ... gy_09.html