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Related Concept Videos

Ethical Issues01:27

Ethical Issues

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Nurses are essential in patient care, upholding the ethical principles of their profession and effectively navigating ethical dilemmas. Neglecting ethical issues can lead to inadequate patient care, compromised therapeutic relationships, and moral distress among healthcare workers.
Ethical Concerns in Healthcare:
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Alkyl Halides02:45

Alkyl Halides

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Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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Acid Halides to Esters: Alcoholysis01:12

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Alcoholysis is a nucleophilic acyl substitution reaction in which an alcohol functions as a nucleophile. Acid halides react with alcohol to produce esters. The mechanism proceeds in three steps:
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Issues And Trends In Healthcare Delivery System01:29

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The issues and trends in healthcare delivery are constantly changing. The COVID-19 pandemic is one recent issue that wreaked havoc on healthcare systems, causing a shortage of healthcare workers, high demand for medicines and supplies, and increased medical expenditure due to a lack of insurance. Other issues include rising healthcare costs and care fragmentation.
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Mass Spectrometry: Alkyl Halide Fragmentation01:22

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Chlorine isotopes exist as 35Cl and 37Cl in a 3:1 ratio, while bromine isotopes exist as 79Br and 81Br in a 1:1 ratio. The mass spectrum of alkyl halides typically produces two distinct molecular ion peaks, the molecular ion peak, [M], and the molecular ion plus two, [M + 2] peak. The relative heights of these two peaks are proportional to the isotopic abundance ratios of the halide. For example, 2‐chloropropane and 1‐bromopropane display two peaks with relative peak heights in a 3:1 and...
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Acid Halides to Carboxylic Acids: Hydrolysis01:01

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Hydrolysis of acid halides is a nucleophilic acyl substitution reaction in which acid halides react with water to give carboxylic acids. The reaction occurs readily and does not require acid or a base catalyst.
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    Area of Science:

    • Optics and Optical Materials Science
    • Materials Science and Engineering
    • Solid State Physics

    Background:

    • Halide perovskites have rapidly emerged as a significant class of materials in optoelectronics.
    • Initial success was in thin-film solar cells, but recent interest spans LEDs, lasers, photodetectors, and nonlinear optics.
    • Fundamental understanding of perovskite properties, including composition, processing, and environmental effects, is still developing.

    Purpose of the Study:

    • To present a curated collection of recent research on halide perovskites for optoelectronic applications.
    • To highlight the multidisciplinary advancements in the field.
    • To provide a snapshot of the current state-of-the-art and future research directions.

    Main Methods:

    • This feature issue compiles research from various experimental and theoretical investigations.
    • Methods likely include material synthesis, device fabrication, and advanced characterization techniques.
    • Studies focus on understanding structure-property relationships and performance metrics.

    Main Results:

    • The collection showcases diverse applications of halide perovskites beyond solar cells.
    • Papers address challenges and opportunities in controlling material properties.
    • New insights into the fundamental behavior of perovskites are presented.

    Conclusions:

    • Halide perovskites are versatile materials with expanding optoelectronic applications.
    • Continued research is crucial for optimizing performance and stability.
    • This feature issue captures the dynamic progress in perovskite optoelectronics.