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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
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A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
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The elixir phase of chain molecules.

Tatjana Škrbić1,2, Trinh X Hoang3, Amos Maritan4

  • 1Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari di Venezia Campus Scientifico, Edificio Alfa, Venezia Mestre, Italy.

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This summary is machine-generated.

Researchers discovered a new "elixir phase" in polymer chains, distinct from traditional matter phases. This phase, resembling protein structures, could inspire new biomachines and has implications for astrobiology.

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Area of Science:

  • Physics
  • Materials Science
  • Biophysics

Background:

  • Phases of matter are defined by macroscopic properties, independent of microscopic details.
  • Familiar examples include solid, liquid, and gas phases, each with distinct behaviors.
  • Understanding new phases can unlock novel material properties and applications.

Purpose of the Study:

  • To identify and characterize a novel phase of matter in a polymeric chain model.
  • To explore the conditions under which this new phase emerges.
  • To investigate the structural properties and potential implications of this phase.

Main Methods:

  • Simulation of a simple polymeric chain model.
  • Introduction of side spheres to break cylindrical symmetry.
  • Analysis of emergent ground states and structural configurations.

Main Results:

  • Identification of a new

Conclusions:

  • The elixir phase represents a novel state of matter in polymeric systems.
  • Its structure, featuring helices and planar sheets, is reminiscent of protein native folds.
  • This discovery has potential applications in bioinspired nanomachines and astrobiology.