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Related Concept Videos

Halo Effect01:27

Halo Effect

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The halo effect is a cognitive bias in which an individual's overall impression influences judgments about their specific traits. This psychological phenomenon leads people to associate positive characteristics with those they perceive as generally good and negative characteristics with those they view as bad. This effect is particularly influential in social perception, professional evaluations, and decision-making processes.The Psychological Basis of the Halo EffectThe halo effect is rooted...
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Matrix-Assisted Laser Desorption Ionization (MALDI)01:08

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Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI is an ionization technique, widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix...
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One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
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Lewis Acids and Bases02:33

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In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
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Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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Related Experiment Video

Updated: Jan 27, 2026

Fluorescence In Situ Hybridization on DNA Halo Preparations to Reveal Whole Chromosomes, Telomeres and Gene Loci
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Laser bathymetry based on the halo effect.

Lev S Dolin

    Applied Optics
    |March 16, 2019
    PubMed
    Summary

    This study develops laser bathymetry using halo radius measurements. It explores light scattering effects and proposes algorithms to determine water optical properties for improved underwater mapping.

    Area of Science:

    • Optics
    • Hydrography
    • Remote Sensing

    Background:

    • Laser bathymetry offers a method for underwater depth measurement.
    • Understanding light interaction with water is crucial for accurate remote sensing.
    • Existing methods may be limited by water clarity and scattering effects.

    Purpose of the Study:

    • To establish the physical principles of a novel laser bathymetry technique.
    • To investigate the influence of water's optical properties on measurement accuracy.
    • To develop algorithms for deriving water characteristics from bathymetric data.

    Main Methods:

    • Developing the physical fundamentals of laser bathymetry based on halo radius measurement.
    • Theoretical analysis of light scattering and absorption effects on halo visibility.

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  • Proposing algorithms to determine water optical properties using bottom radiance measurements.

    • Main Results:

    • Established physical fundamentals for laser bathymetry using halo radius.
    • Quantified the impact of light scattering and absorption on halo contrast and visibility depth.
    • Developed algorithms for inferring water optical properties from laser-induced halo radiance.

    Conclusions:

    • The developed laser bathymetry method provides a new approach for underwater surveying.
    • Understanding light-water interactions is key to optimizing bathymetric measurements.
    • The proposed algorithms enable simultaneous determination of water optical properties and depth.