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Related Concept Videos

Rotation of Asymmetric Top01:11

Rotation of Asymmetric Top

1.6K
By definition, a spherically symmetric body has the same moment of inertia about any axis passing through its center of mass. This situation changes if there is no spherical symmetry. Since most rigid bodies are not spherically symmetric, these require special treatment.
The relationship between the angular momentum of any rigid body and its angular velocity, both of which are vectors, involves the moment of inertia. The moment of inertia is a scalar quantity only for spherically symmetric...
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Asymmetric Lipid Bilayer01:35

Asymmetric Lipid Bilayer

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Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
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IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

1.8K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
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Extraction: Effects of pH00:53

Extraction: Effects of pH

1.4K
Consider a neutral form of an amine, B, with a partition coefficient, K, in a liquid mixture containing organic and aqueous phases. The pH of the aqueous phase affects the charge on acidic and basic solutes, and the charged form is usually more soluble in the aqueous phase. Suppose the conjugate acid form of the amine is soluble only in the aqueous phase while the base form is soluble in both phases. Then the distribution coefficient, D, can be given as the ratio of amine concentration in the...
1.4K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

1.2K
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Asymmetric Walkway: A Novel Behavioral Assay for Studying Asymmetric Locomotion
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Asymmetric Extraction: How to Use Smartly.

Jyoti Pandhare, Gulshan Kumar Singh, Pradeep Tandon

    International Journal of Orthodontics (Milwaukee, Wis.)
    |May 31, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Asymmetric extraction efficiently relieves dental crowding without extending treatment duration. This orthodontic technique avoids complex mechanics for simpler patient care.

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    Area of Science:

    • Orthodontics
    • Dental Mechanics

    Background:

    • Crowding is a common orthodontic issue requiring effective treatment strategies.
    • Traditional methods for relieving crowding can sometimes prolong treatment time or involve complex mechanics.

    Observation:

    • This case report details the application of asymmetric extraction.
    • Asymmetric extraction was employed to address dental crowding.

    Findings:

    • The asymmetric extraction method successfully relieved dental crowding.
    • Treatment time was not increased by employing this technique.
    • The procedure did not require the use of complicated orthodontic mechanics.

    Implications:

    • Asymmetric extraction offers a simplified approach to managing dental crowding.
    • This method presents a viable alternative for clinicians seeking efficient orthodontic solutions.
    • The findings suggest potential for reduced treatment complexity and duration in specific orthodontic cases.