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Related Concept Videos

Accelerators01:17

Accelerators

335
Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
The effectiveness of calcium chloride can...
335
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

504
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
504
Methods of Medium Optimization01:28

Methods of Medium Optimization

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Optimizing growth media enhances microbial proliferation and maximizes product yield. Statistical experimental design methodologies provide structured and reproducible approaches, offering progressively higher levels of robustness and efficiency.The One-Factor-at-a-Time (OFAT) MethodThe One-Factor-at-a-Time (OFAT) method involves adjusting a single variable while keeping all others constant. However, it cannot detect interactions between variables, often leading to suboptimal outcomes when...
19
Accelerated Curing of Concrete01:25

Accelerated Curing of Concrete

565
Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...
565
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

614
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
614
Drug Discovery: Overview01:26

Drug Discovery: Overview

13.0K
Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
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Related Experiment Video

Updated: Mar 25, 2026

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Accelerating Lead Compound Optimization.

Alissa Poh

    Cancer Discovery
    |February 13, 2016
    PubMed
    Summary

    Researchers developed strain-release amination for rapid synthesis of strained-ring structures. This method enables efficient production of key molecular scaffolds for drug optimization, including cancer therapeutics.

    Area of Science:

    • Organic Chemistry
    • Medicinal Chemistry
    • Drug Discovery

    Background:

    • Strained-ring structures are crucial for optimizing drug properties.
    • Traditional synthesis methods for these structures can be inefficient and time-consuming.
    • There is a need for novel synthetic strategies to access complex molecular architectures.

    Discussion:

    • Strain-release amination offers a rapid and efficient route to strained-ring systems.
    • This methodology facilitates the synthesis of key intermediates for drug development.
    • The technique was successfully applied to produce a critical structure for a cancer drug candidate.

    Key Insights:

    • Strain-release amination is a powerful tool for synthesizing strained-ring compounds.
    • The method significantly accelerates the production of complex molecular scaffolds.

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  • This approach aids in the evaluation of potential drug candidates, such as in cancer research.

    • Outlook:

    • This novel synthetic strategy holds promise for broader applications in medicinal chemistry.
    • Further development could lead to more efficient drug discovery pipelines.
    • The technique may enable the synthesis of previously inaccessible drug-like molecules.