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Evolutionary history of life

Evolutionary history of life
Related:  à mettre en ligneEvolution

Phase diagram Overview[edit] Common components of a phase diagram are lines of equilibrium or phase boundaries, which refer to lines that mark conditions under which multiple phases can coexist at equilibrium. Phase transitions occur along lines of equilibrium. Triple points are points on phase diagrams where lines of equilibrium intersect. Triple points mark conditions at which three different phases can coexist. For example, the water phase diagram has a triple point corresponding to the single temperature and pressure at which solid, liquid, and gaseous water can coexist in a stable equilibrium. Types of phase diagrams[edit] 2D phase diagrams[edit] The curves on the phase diagram show the points where the free energy (and other derived properties) becomes non-analytic: their derivatives with respect to the coordinates (temperature and pressure in this example) change discontinuously (abruptly). Other thermodynamic properties Temperature vs. specific entropy phase diagram for water/steam. See also[edit]

"Evolution is Fact" A Cartography of the Anthropocene The Anthropocene: A primer. The Anthropocene. We’re already there. This is our time, our creation, our challenge. Officially, this epoch does not exist. Yet. Unofficially however, the term is used more frequently in the scientific literature and, more recently, in publications dedicated to the general public. So, might you ask, what is the Anthropocene? First, the etymology. The term was proposed in 2000 by Paul J. Technically, the Anthropocene is the most recent period of the Quaternary, succeding to the Holocene. The Pleistocene (2.588 Ma to 11.7 Ka) was a tumultuous era, during which more than eleven major glaciations occurred. The Holocene (11.7 ka until about 1800 AD) was a time comparatively smoother in terms of climate variability. We are officially still in the Holocene. We collectively rolled over into a new era, which includes its stakes and challenges but also its opportunities and great qualities. Mapping the Anthropocene: first few steps. Comments?

approche graphe (le structuré et le structurer) Une bonne présentation ou un bon texte « déroule » des informations de façon cohérente selon un fil conducteur choisi par son auteur et servant son propos. Qu’en est-il d’une visualisation faite par un facilitateur graphique ? Comme promis dans l’article décrivant mon intervention pour EDF R&D lors de la Journée de l’innovation du Printemps de la Recherche, je vous propose une réflexion sur la structure de l’information. Vos réactions et remarques sont les bienvenues, n’hésitez pas à poster un commentaire. Le travail réalisé pour EDF est un très bon exemple pour aborder la question de la structuration de l’information puisque sur la même intervention, j’ai accompagné trois structures d’informations différentes (lire l’article). Un facilitateur graphique traite de l’information. Ces questions, essentielles à se poser en tant que praticien, doivent s’accompagner de celles-ci : à qui je m’adresse (pour qui je capture) et quel est l’objectif de cette capture? Retranscription visuelle:

A New Thermodynamics Theory of the Origin of Life Why does life exist? Popular hypotheses credit a primordial soup, a bolt of lightning and a colossal stroke of luck. But if a provocative new theory is correct, luck may have little to do with it. Instead, according to the physicist proposing the idea, the origin and subsequent evolution of life follow from the fundamental laws of nature and “should be as unsurprising as rocks rolling downhill.” From the standpoint of physics, there is one essential difference between living things and inanimate clumps of carbon atoms: The former tend to be much better at capturing energy from their environment and dissipating that energy as heat. Jeremy England, a 31-year-old assistant professor at the Massachusetts Institute of Technology, has derived a mathematical formula that he believes explains this capacity. Kristian Peters Cells from the moss Plagiomnium affine with visible chloroplasts, organelles that conduct photosynthesis by capturing sunlight. Courtesy of Jeremy England Wilson Bentley

My Critique (s243a) of Pearltree 2.0 Sea anemone: genetically ½ animal, ½ plant A team led by evolutionary and developmental biologist Ulrich Technau at the University of Vienna has discovered that sea anemones display a genomic landscape with a complexity of regulatory elements similar to that of fruit flies or other animal model systems. This suggests that this principle of gene regulation is already 600 million years old and dates back to the common ancestor of human, fly and sea anemone. On the other hand, sea anemones are more similar to plants rather to vertebrates or insects in their regulation of gene expression by short regulatory RNAs called microRNAs. These surprising evolutionary findings are published in two articles in the journal Genome Research. Our appearance, the shape we have and how our body works is, in addition to environmental influences, largely the result of the action of our genes. However, genes are rarely single players, they rather act in concert and regulate each other's activity and expression in gene regulatory networks. …and in plants

Human Proteome Map CRACKED: 7 Animals That Are Evolving Right Before Our Eyes People who doubt evolution tend to have one main argument: "If evolution is true, why do we still see monkeys running around today, all chimp-like? Where are all the monkey-men I was promised?" Well, if you or someone you know refuses to believe that organisms change over time without proof on a monkey-man level, here are a buttload of animals in the middle of getting their evolve on. Well, seven anyway. Elephants are Evolving to Lose Their Tusks (and Avoid Poachers) Here's a joke: What did the elephant say to the poacher? Getty"Stop! Sorry about that. GettyAnd ever since animal rights got involved, unemployment has shot up 300 percent. So elephants have decided to take matters into their own hands ... or trunks or weirdly rounded three-toed feet or whatever. By 2005, it was estimated that the tuskless population had risen to between 5 and 10 percent. GettyJust like your debilitating lisp after reading that out loud Russian Dogs are Evolving to Learn the Subways Getty Check it: Via MSNBC