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Related Concept Videos

Simplified Synchronous Machine Model01:30

Simplified Synchronous Machine Model

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The Synchronous Machine Model is a fundamental tool in analyzing and ensuring the transient stability of power systems. This model simplifies the representation of a synchronous machine under balanced three-phase positive-sequence conditions, assuming constant excitation and ignoring losses and saturation. The model is pivotal for understanding the behavior of synchronous generators connected to a power grid, particularly during transient events.
In this model, each generator is connected to a...
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Preparation of Epoxides03:00

Preparation of Epoxides

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Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
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Preparation of Amides01:29

Preparation of Amides

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Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
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Preparation of Nitriles01:12

Preparation of Nitriles

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One of the common methods to prepare nitriles is the dehydration of amides. This method requires strong dehydrating agents like phosphorous pentoxide or boiling acetic anhydride for converting amides to nitriles. Another reagent namely, thionyl chloride also accomplishes the dehydration of amides, where amide acts as a nucleophile. The first step of the mechanism involves the nucleophilic attack by the amide on the thionyl chloride to form an intermediate. In the next step, the electron pairs...
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Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

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Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
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Preparation of Acid Anhydrides01:07

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One of the methods for preparing symmetrical or unsymmetrical acid anhydrides involves the treatment of acid chlorides with the sodium salt of carboxylic acids. The reaction proceeds via a nucleophilic acyl substitution.
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Related Experiment Video

Updated: Feb 10, 2026

Real-Time Dynamic Navigation System for the Precise Quad-Zygomatic Implant Placement in a Patient with a Severely Atrophic Maxilla
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Simplifying Zygomatic Implant Site Preparation Using Ultrasonic Navigation: A Technical Note.

Gerardo Pellegrino, Achille Tarsitano, Valerio Taraschi

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    This study introduces a new computer-aided technique for zygomatic implant surgery. It uses standard ultrasonic tips and navigation for better control and simpler preparation of the zygomatic bone site.

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    Area of Science:

    • Oral and Maxillofacial Surgery
    • Dental Implantology
    • Surgical Navigation

    Background:

    • Zygomatic implant site preparation is challenging due to long drills and oblique malar bone surfaces.
    • Existing ultrasonic methods require specialized, less effective long tips.

    Observation:

    • A novel computer-aided technique is proposed for zygomatic implant site preparation.
    • This method utilizes standard-length ultrasonic tips in two stages: crestal and zygomatic bone preparation.
    • A real-time tracking navigation system guides the implant trajectory during preparation.

    Findings:

    • The combined use of navigation and ultrasonic tips offers improved instrument control.
    • This technique aims to maintain the planned zygomatic implant position throughout preparation.

    Implications:

    • If validated, this technique could simplify zygomatic implant procedures.
    • It may lead to reduced invasiveness, smaller flaps, and less soft tissue damage.
    • Further clinical trials are needed to confirm efficacy.