19 MAR 2015 by ideonexus
Protocells
In 2007 two researchers, chemist Martin Hanczyc and artificial life scientist Takashi Ikegami, who were collaborating across disciplines agreed to test a hypothesis about the earliest forms of life (Hanczyc et al. 2007). They hypothesized that life’s precursors would need to move around their environment to take advantage of a resource-rich situation on early Earth. Hanczyc made a model system to test this hypothesis using an oil droplet that he bestowed with an internal chemical reaction, or...Folksonomies: biology origin of life
Folksonomies: biology origin of life
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notesFrom Rachel Armstrong's "Alternative Biologies"
24 JAN 2015 by ideonexus
Computer Metaphors for Biochemistry
The metaphor of the computer represents in some crude fashion the chemistry of life. Nowadays one may assume that the average citizen of an industrialized country is at least as familiar with computers as with rain forests. The idea of using the computer as a metaphor is a natural one. A computer is a device for handling information according to a program which it is able to remember and execute. A living cell, to remain in control of its vital functions in a variable environment, must also p...Folksonomies: metaphors
Folksonomies: metaphors
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notes24 JAN 2015 by ideonexus
Science Communication: Definitions VS Metaphors
A hundred years ago, Charles Darwin could write books discussing the central problems of biology in language which was scientifically precise and still accessible to the general public. In those days the subject matter of biology was plants and animals. The language of Darwin was intelligible to experts and non-experts alike. One did not need a degree in {55} botany to understand the difference between a fern and a flower. Darwin could assume that his readers were familiar with the world of...Folksonomies: science communicatoin
Folksonomies: science communicatoin
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notes10 DEC 2013 by ideonexus
Vitamins Come from Living Things
Every vitamin is made by living cells — either our own, or in other species. Vitamin D is produced in our skin, for example, when sunlight strikes a precursor of cholesterol. A lemon tree makes vitamin C out of glucose. Making a vitamin is often an enormously baroque process. In some species, it takes 22 different proteins to craft a vitamin B12 molecule.
While a protein may be made up of thousands of atoms, a vitamin may be made up of just a few dozen. And yet, despite their small size, vit...
1 They are part of our universal chemistry from our common origins.
13 APR 2013 by ideonexus
Conclusions of the IPCC
This IPCC finding makes several different assertions, each of which is worth considering in turn.
First, it claims that atmospheric concentrations of greenhouse gases like CO2 are increasing, and as a result of human activity. This is a matter of simple observation. Many industrial processes, particularly the use of fossil fuels, produce CO2 as a by-product.18 Because CO2 remains in the atmosphere for a long time, its concentrations have been rising: from about 315 parts per million (ppm) wh...Folksonomies: global warming
Folksonomies: global warming
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notesThe organization concludes that Global Warming, which is a very simple theory, is true.
11 JUN 2012 by ideonexus
Deducing the Original Arrangement of Chemicals
The chemists who uphold dualism are far from being agreed among themselves; nevertheless, all of them in maintaining their opinion, rely upon the phenomena of chemical reactions. For a long time the uncertainty of this method has been pointed out: it has been shown repeatedly, that the atoms put into movement during a reaction take at that time a new arrangement, and that it is impossible to deduce the old arrangement from the new one. It is as if, in the middle of a game of chess, after the ... 1 notes
notesFrom a compound is like trying to figure out the history of a chess game from the positions of the pieces on the board at present.
09 JUN 2012 by ideonexus
Biology and Civilization are Analogous
Every breath you draw, every accelerated beat of your heart in the emotional periods of your oratory depend upon highly elaborated physical and chemical reactions and mechanisms which nature has been building up through a million centuries. If one of these mechanisms, which you owe entirely to your animal ancestry, were to be stopped for a single instant, you would fall lifeless on the stage. Not only this, but some of your highest ideals of human fellowship and comradeship were not created i...Folksonomies: evolution civilization
Folksonomies: evolution civilization
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notesIn that our respiration depends on many biological features and our civilization is built on similar foundations.
07 MAY 2012 by ideonexus
Why the Pioneer Anomaly is Worth Investigating
In the short run, knowing the gravitational constant to one more decimal digit of precision or placing even tighter limits on any deviation from Einstein's gravitational theory may seem like painfully nitpicking detail. Yet one must not lose sight of the "big picture." When researchers were measuring the properties of electricity with ever more refined instruments over two hundred years ago, they did not envision continent-spanning power grids, an information economy, or tiny electrical signa... 1 notes
notesThe effect is tiny, but magnified over great distances, and if we are meticulous now, we make it possible for future generations to traverse the solar system.
28 JAN 2012 by ideonexus
The Importance of Surfaces
I would like to start by emphasizing the importance of surfaces. It is at a surface where many of our most interesting and useful phenomena occur. We live for example on the surface of a planet. It is at a surface where the catalysis of chemical reactions occur. It is essentially at a surface of a plant that sunlight is converted to a sugar. In electronics, most if not all active circuit elements involve non-equilibrium phenomena occurring at surfaces. Much of biology is concerned with reacti... 1 notes
notesSurfaces are where are the interesting scientific stuff is taking place.
13 JAN 2012 by ideonexus
All Chemical Reactions Involve Negative and Positive Forces
... every chemical combination is wholly and solely dependent on two opposing forces, positive and negative electricity, and every chemical compound must be composed of two parts combined by the agency of their electrochemical reaction, since there is no third force. Hence it follows that every compound body, whatever the number of its constituents, can be divided into two parts, one of which is positively and the other negatively electrical. Folksonomies: chemistry
Folksonomies: chemistry
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notesIn relation to one another, one compound is negatively charged, the other positively, with no other force involved.
