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Related Concept Videos

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Specific Gravity of Aggregate

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Aggregates typically contain pores, which can be either permeable or impermeable. Considering the pores in the aggregates, the specific gravity of aggregates is defined in three different forms, namely, bulk or gross specific gravity, apparent specific gravity, and absolute specific gravity.
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Like benzene, cyclobutadiene and cyclooctatetraene are cyclic compounds with alternate single and double bonds. However, their chemical behavior differs from benzene, as they are unstable and not aromatic. So, what are the structural characteristics of unsaturated compounds categorized as aromatic?  
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Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
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The Aggregate Cement ratio refers to the weight of aggregate divided by the weight of cement in a concrete mix. Altering this ratio has profound effects on the concrete's properties. This ratio plays a pivotal role in determining the strength, workability, and durability of concrete. When the Aggregate Cement ratio is higher, the mix is leaner, meaning it has less cement paste to lubricate the aggregate, potentially making the concrete less workable. Such mixes, known as lean, enhance the...
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Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
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2023 AGS Beers Criteria® for Potentially Inappropriate Medication Use in Older People: A Summary of the Updates.

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Related Experiment Video

Updated: Dec 29, 2025

Optimization of Processing of Tiebangchui with Highland Barley Wine Based on the Box-Behnken Design Combined with the Entropy Method
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Highlights From the 2019 AGS Beers Criteria® Updates.

Creaque V Charles, Angie Eaton

    The Senior Care Pharmacist
    |February 6, 2020
    PubMed
    Summary

    The 2019 AGS Beers Criteria® provides updated guidance on potentially inappropriate medications (PIMs) for older adults. This revision aims to enhance geriatric care by refining medication recommendations and minimizing risks.

    Area of Science:

    • Geriatric Medicine
    • Pharmacology
    • Public Health

    Background:

    • The American Geriatrics Society (AGS) Beers Criteria® identifies potentially inappropriate medications (PIMs) for older adults.
    • Regular updates are crucial to reflect current medical knowledge and medication availability.

    Purpose of the Study:

    • To compare the 2015 and 2019 versions of the AGS Beers Criteria®.
    • To identify and summarize key changes and updates in PIM recommendations for the elderly.

    Main Methods:

    • Literature review of the 2015 and 2019 AGS Beers Criteria® publications.
    • Comparative analysis to highlight differences and new inclusions/exclusions.
    • Synthesis of findings regarding medication safety in older adults.

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    Main Results:

    • The 2019 AGS Beers Criteria® includes updated lists of medications to be used with caution, avoided, or dose-adjusted in older adults.
    • The updated criteria also notes the removal of certain medications due to unavailability, low usage, or minimal unique harm to the elderly.
    • Key changes reflect advancements in understanding PIMs and their impact on geriatric populations.

    Conclusions:

    • The AGS Beers Criteria® serves as a vital tool for optimizing geriatric care.
    • The 2019 update aims to further minimize older adults' exposure to PIMs.
    • The criteria provide recommendations, rationale, and evidence strength to guide clinical practice.