[Thermodynamic Analysis of Two State Transitions under High Pressure. Theoretical Consideration]
Biofizika
|November 24, 2015
Summary
High pressure effects on biopolymer heat denaturation were analyzed. Pressure can stabilize or destabilize macromolecules, influencing transition temperature and enthalpy based on volume changes.
Area of Science:
- Biophysics
- Thermodynamics
- Polymer Science
Context:
- Investigating the impact of high pressure on the thermal stability of biopolymers.
- Utilizing an equilibrium model to analyze the transition between two states.
Purpose:
- To formulate equations determining the dependence of thermodynamic parameters (enthalpy, entropy, transition temperature) on pressure.
- To understand how pressure influences biopolymer structure and denaturation.
Summary:
- High pressure can either stabilize or destabilize macromolecule structures, contingent on the volume change during transition.
- The transition temperature's dependence on pressure lacks local extrema.
- Enthalpy and volume changes during denaturation do not alter signs with increasing pressure.
Impact:
- Provides insights into the pressure-dependent behavior of biopolymers.
- Contributes to understanding protein folding and stability under varying conditions.
- Informs applications involving high-pressure processing of biological materials.
Related Concept Videos
01:21Path Between Thermodynamics States
5.0K
Consider the two thermodynamic processes involving an ideal gas that are represented by paths AC and ABC in Figure 1:
5.0K
01:19Phase Diagram
7.3K
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
7.3K
01:24Phase Diagram
120
A phase diagram is a graphical representation of the physical states of a substance under different conditions of temperature and pressure. It shows the boundaries between solid, liquid, and gas phases and the conditions at which these phases coexist in equilibrium. An area in a phase diagram represents a single phase, whereas lines or phase boundaries represent the equilibrium between two phases.In the phase diagram of water, the boundary line between the solid and liquid states illustrates...
120
01:21Phase Transitions
64
A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
64
02:31Phase Transitions
23.7K
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...
23.7K
01:27Variables and Equations of State
125
The physical state of a pure substance can be defined by certain state variables such as volume (V), pressure (p), temperature (T), and amount of substance (n). When two gases are separated by a movable wall, the gas with the higher pressure naturally compresses the gas with the lower pressure. This causes the high-pressure gas to expand and the low-pressure gas to compress until both gases achieve mechanical equilibrium. At this point, their pressures equalize, and the movement of the wall...
125