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Related Concept Videos

Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
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The confirmation bias is the tendency to focus on information that confirms our existing beliefs and ignore information that is inconsistent with our expectations. For example, if you think that your professor is not very nice, you notice all of the instances of rude behavior exhibited by the professor while ignoring the countless pleasant interactions he is involved in on a daily basis. Have you ever fallen prey to the confirmation bias, either as the source or target of such bias?
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Hindsight bias leads you to believe that the event you just experienced was predictable, even though it really wasn’t. In other words, you knew all along that things would turn out the way they did. Can you relate this to the phrase "Hindsight is 20/20" now? 
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Bias refers to any tendency that prevents a question from being considered unprejudiced. In research, bias occurs when one outcome or answer is selected or encouraged over others in sampling or testing. Bias can occur during any research phase, including study design, data collection, analysis, and publication.
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Updated: Feb 2, 2026

Assessment of Zebrafish Lens Nucleus Localization and Sutural Integrity
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Assessment of Zebrafish Lens Nucleus Localization and Sutural Integrity

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Does Local Structure Bias How a Crystal Nucleus Evolves?

Kyle Wm Hall1,2, Zhengcai Zhang1,3, Christian J Burnham4

  • 1Department of Chemistry , University of Calgary , Calgary , Alberta T2N 1N4 , Canada.

The Journal of Physical Chemistry Letters
|November 29, 2018
PubMed
Summary
This summary is machine-generated.

Local structures influence crystal nucleation dynamics, impacting crystal motif formation in ice and gas hydrates. This study reveals a new facet of crystallization, essential for understanding and advancing crystal growth processes.

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Chemical Engineering

Background:

  • Crystallization is crucial in science and technology, with nucleation being a key research area.
  • Previous studies often overlooked the coupling between molecular dynamics of crystal nuclei and local structures.
  • Recent experiments suggest this coupling may occur, highlighting a gap in scientific understanding.

Purpose of the Study:

  • To investigate the nucleation of single and multicomponent crystals, specifically ice and mixed gas hydrates.
  • To determine if local structures can bias the molecular-level dynamics of individual crystal nuclei.
  • To reveal new aspects of crystallization behavior and their implications.

Main Methods:

  • Probing the nucleation processes of ice and mixed gas hydrates.
  • Utilizing computational and experimental techniques to observe molecular dynamics on a nanosecond timescale.
  • Analyzing the influence of local structures on the evolution of nascent crystal phases.

Main Results:

  • Established that local structures can bias the evolution of nascent crystal phases.
  • Observed that this bias occurs on a nanosecond timescale, affecting crystal motif appearance/disappearance.
  • Demonstrated that structural biases are likely prevalent in various crystallization processes beyond ice and gas hydrates.

Conclusions:

  • Local structures play a significant role in biasing crystal nucleation dynamics.
  • This finding provides a new perspective for interpreting existing computational and experimental crystallization data.
  • Identified future research opportunities in understanding structurally biased dynamics in crystallization.