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Topic: Origin of life

Seminar
2 seminars

In Astrobiology and Chemistry

Seminar · Chemistry

Physical and Chemical Models for the Emergence of Biological Homochirality

Donna G. Blackmond · Scripps Research Institute

Fri, Oct 7, 2022 · 19:00 UTC

Donna Blackmond examines two linked problems in the origin of life: how an initially balanced mixture of molecular mirror images could acquire a handedness bias, and how that small bias could be amplified. She compares four experimental approaches using chemical kinetics and solid–solution equilibria. The first is asymmetric autocatalysis, including the Soai reaction and kinetic models connecting self-replication with suppression of the opposite enantiomer. Blackmond distinguishes this powerful model from a demonstrated prebiotic pathway. She then discusses amplification through eutectic part

Seminar · Physics of Life

Physics and the Origin of Life: From Chirality to Membranes to Information

Jack Szostak · Harvard University

Fri, Oct 8, 2021 · 14:00 UTC

Diverse physical processes played important roles in the origin of life. I will review the origin of molecular homochirality, the growth of protocell membranes, and potential roles for liquid-liquid phase separation. I will then discuss the concept of functional information and its quantitative relationship with molecular function.

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