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.p087 [[ https://en.wikipedia.org/wiki/Lipid_bilayer | phospholipid membrane molecules ]] hydrophobic inner carbon chains, hydrophilic outer head, bilayer array into membranes .p088 [[ https://en.wikipedia.org/wiki/David_W._Deamer | David Deamer ]] at UC Santa Cruz extracted lipids from meteorites, which spontaneously formed bilayer vesicles .p089 [[ https://en.wikipedia.org/wiki/Pyruvic_aci | Pyruvic acid ]] can also make membranes .p091 [[ https://www.nature.com/articles/ncomms9427.pdf | U. Edinburgh scientists ]] tested thousands of alternate molecular pathways, routes used by life produce more compounds than all possible alternatives .p092 pathways might flexibly mutate to other pathways, but nature evolved towards the optimum |
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.p097 [[ https://en.wikipedia.org/wiki/Gram-positive_bacteria | Gram-positive bacteria ]] peptidoglycan cell wall with inner membrane but no outer membrane .p097 [[ https://en.wikipedia.org/wiki/Gram-negative_bacteria | Gram-negative bacteria ]] peptidoglycan cell wall sandwiched between an inner and outer membrane .p098 Simpler Gram-positive bacteria more susceptible to antibiotics .p103 [[ https://en.wikipedia.org/wiki/Slime_mold | Slime mold ]] cells gather into tentacles and move towards nutrients |
The Equations Of Life
How Physics Shapes Evolution
- Multco Hillsdale . 576.801 C6661e . 2018
- pix Preface
p001 Ch01 Life's Silent Commander
- p02 Compare massive star to ladybug
p019 Ch02 Organizing the Multitudes
p024 active matter physics, Tamás Vicsek
- p026 formula for probability of ant choosing a pheromone trail marked by a prior ant or ants, not usable without examples and numbers
- p027 formulas obscured when many ants swarm towards multiple goals
- p028 self-organizing behavior, not supervised but seeming so
- p034 birds save energy by flying in formation and coordinating wing beats, minimizing downwash effects
- p035 18yo Cockell in the Canadian north, banding birds caught in nets, then released
- different ducks behaved differently, unique individual "personalities"
- p035 Physics trumps individuality
- p036 cellular cytoskeleton proteins self-organize
p037 kinesin (anterograde) and myosin (retrograde) motor molecules crawl along polar tubulin filaments
p039 Ch03 The Physics of the Ladybug
p045 chiten 10% steel strength, 10x keratin/hair strength
p055 irrefragable irrefutable, indisputable
p055 hemolymph insect body fluid comparable to vertebrate blood
p056 mathematical olio heterogeneous hodgepodge
p059 Ch04 All Creatures Great and Small
p061 mole tolerance of high CO₂ Talpidae "true moles" in Europe, Asia, North America; marsupials in Australia with similar shape and burrowing physics
- p067 no propellers on fish, but flagella on microbes, 600 body lengths per second
p068 low Reynolds numbers at small scale, viscosity dominates inertia
p069 On Growth and Form 1917, by D'Arcy Wentworth Thompson
- p070 "first serious attempt to demonstrate the mathematical regularity of life"
p070 some accuse Thompson of vitalism; instead, life is bounded by laws
- p076 biological inherency, similar structures modified to suit laws prevailing in different environments
- p077 transition from sea to land "required several experiments to succeed"
p080 SSH Sonic Hedgehog protein gene signals limb formation, suppressed in snakes
p083 Ch05 Bundles of Life
p087 phospholipid membrane molecules hydrophobic inner carbon chains, hydrophilic outer head, bilayer array into membranes
p088 David Deamer at UC Santa Cruz extracted lipids from meteorites, which spontaneously formed bilayer vesicles
p089 Pyruvic acid can also make membranes
p091 U. Edinburgh scientists tested thousands of alternate molecular pathways, routes used by life produce more compounds than all possible alternatives
- p092 pathways might flexibly mutate to other pathways, but nature evolved towards the optimum
p092 np285 Barve 2014: Historical contingency and the gradual evolution of metabolic properties in central carbon and genome-scale metabolisms
p095 Most microbial membranes surrounded by a peptidoglycan wall, "like a chicken wire mesh"
p095 np287 Persat 2014: The curved shape of Caulobacter crescentus enhances surface colonization in flow
p097 Gram-positive bacteria peptidoglycan cell wall with inner membrane but no outer membrane
p097 Gram-negative bacteria peptidoglycan cell wall sandwiched between an inner and outer membrane
- p098 Simpler Gram-positive bacteria more susceptible to antibiotics
p103 Slime mold cells gather into tentacles and move towards nutrients
p105 Ch06 The Edge of Life
p125 Ch07 The Code of Life
p145 Ch08 Of Sandwiches and Sulfur
p167 Ch09 Water, the Liquid of Life
p195 Ch10 The Atoms Of Life
p217 Ch11 Universal Biology
p239 Ch12 The Laws of Life: Evolution and Physics Unified
p259 Acknowledgements
p263 Notes
p325 Index