Disorder Measure
Disorder Measure - Related Videos
02:18
Intrinsically Disordered Proteins
0 Views •
2020
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
07:51
A Protocol for Measuring Cue Reactivity in a Rat Model of Cocaine Use Disorder
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Cited by 6 •
2018
Cue reactivity is conceptualized as sensitivity to cues linked with drug-taking experiences that contribute to craving and relapse in abstinent humans. Cue reactivity is modeled in rats by measuring attentional orientation toward drug-associated cues that results in appetitive approach behavior in a cue reactivity test following self-administration and forced abstinence.
10:17
An Introduction to Modeling Behavioral Disorders and Stress
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2023
Recently, it has been discovered that behavioral conditions such as, depression, anxiety and stress-response have a neurological basis. Understanding the biological underpinnings of these conditions may help scientists in developing more effective therapies to treat these disorders. Typically, rodent models are used in this field and behavioral scientists create these models using interventions like drug administration or surgery. It is important to understand how to create and evaluate rodent...
10:02
Executive Function in Autism Spectrum Disorder
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California Attention, working-memory, planning, impulse control, inhibition, and mental flexibility are important components of human cognition that are often referred to as executive functions. Autism spectrum disorder is a developmental disorder that is characterized by impairments in social interaction, communication, and repetitive behaviors. It is a disorder that lasts a lifetime, and is thought to affect...
01:27
Disorders of Erythrocytes
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2024
Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function. Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions. A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts. On the other...
FAQs
Accessible microstates represent the different arrangements available to particles and energy. When a change opens more of these possibilities, entropy rises because the system can distribute matter or energy in more ways. This principle explains why mixing, melting, and gas expansion are associated with increasing entropy and helps connect molecular organization with measurable thermodynamic behavior.
Entropy and enthalpy provide complementary information about thermodynamic change. Entropy describes how the available arrangements of particles and energy shift, while enthalpy describes the associated energy change. Considering both allows chemists to evaluate whether a reaction or phase transition is thermodynamically favorable under specified conditions rather than judging the outcome from molecular dispersal alone.
Entropy tends to increase when particles gain access to a broader range of arrangements. Mixing combines previously separated matter, melting removes the ordered solid arrangement, and gas expansion makes additional space available to particles. These examples show that the relevant change is not simply movement, but an increase in the number of accessible microstates.
The significance of an entropy change depends on the conditions in which the chemical or physical change occurs. Comparing entropy with enthalpy under those specified conditions supports conclusions about thermodynamic favorability and equilibrium. Without that context, an increase in accessible arrangements alone does not fully describe whether a reaction or phase transition will proceed as considered.
A useful analysis begins by identifying how particle arrangements and energy accessibility change during the process. Chemists then assess whether mixing, melting, expansion, or another change increases the available microstates and consider the accompanying enthalpy change. Comparing these thermodynamic contributions under specified conditions helps evaluate favorability, equilibrium behavior, and likely energy transformations.
It helps explain why equilibrium reflects a balance between competing thermodynamic influences rather than particle arrangement alone. Tracking entropy alongside enthalpy shows how molecular organization and energy changes contribute to the state favored under specified conditions. This perspective supports interpretation of equilibrium as part of the broader relationship between chemical change, spontaneity, and energy transformation.
Material behavior often includes changes in molecular organization, phase, or energy distribution, all of which can alter accessible microstates. Entropy therefore helps analyze transitions such as melting and expansion in addition to reactions. Combined with enthalpy, it gives chemistry a framework for relating microscopic arrangements to macroscopic behavior in chemical and material systems.