Tag Archive: pheromone

Sulfated steroids and RNA-mediated identity codes

terrarium eco system

Summary: In two studies of human pheromones we linked a mixture of androsterone and androstenol to increased flirtatious behavior and reports of increased attraction to the male wearing the mixture. This blog posts explains the reason for the use of…
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Let there be anti-entropic light (2)

Physics

Without knowing anything about the biophysically constrained chemistry of protein folding that links light-induced amino acid substitutions to the stability of DNA is the organized genomes from plants via bioluminescent bacteria in squid, the pattern of nutrient-dependent biologically-based cause and…
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Defining pheromone

human-brain

Earlier today, I discovered a change to what Google displays as the definition of a “pheromone.” a chemical substance produced and released into the environment by an animal, especially a mammal or an insect, affecting the behavior or physiology of…
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Food odors and chemosignals in body odor

social interaction and brain

A Sniff of Happiness Excerpt: We observed that exposure to body odor collected from senders of chemosignals in a happy state induced a facial expression and perceptual-processing style indicative of happiness in the receivers of those signals. Our findings suggest…
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The biologically-based origin of the mammalian placenta

The past is not the key to the present

Summary: In this open access journal article, Gunter Wagner’s group eliminates assumptions about mutations and ends the obfuscation of biologically-based cause and effect. Experimental evidence links ecological variation via non-living viruses to ecological adaptations manifested in the biodiversity of morphological…
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From Hydra to humans vs a Lakatosian research program

translocated chromosome

Imre Lakatos Excerpt: “A Lakatosian research programme[8] is based on a hard core of theoretical assumptions that cannot be abandoned or altered without abandoning the programme altogether. More modest and specific theories that are formulated in order to explain evidence…
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Sackler Colloquium: Effects or AFFECTS on Behavior

social interaction and brain

Arthur M. Sackler Colloquium of the National Academy of Sciences, “Epigenetic Changes in the Developing Brain: Effects on Behavior,” held March 28–29, 2014, at the National Academy of Sciences in Washington, DC. The complete program and video recordings of most…
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Sexual differentiation of cell types in plants

terrarium eco system

Antheridiogen determines sex in ferns via a spatiotemporally split gibberellin synthesis pathway Excerpt: “Homosporous ferns have evolved a mechanism to favor cross-fertilization by controlling the sex ratio among individuals or prothalli within the population with the aid of antheridiogens. Antheridiogens…
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A model of MHC ‘evolution’

thinking forbidden

Sexual selection and the evolutionary dynamics of the major histocompatibility complex Excerpt: “Here, we present the results of the first model of MHC evolution incorporating both survival and reproduction, modelling the combined effects of natural selection and MHC-based disassortative mating…
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