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Related Concept Videos

Reaction Rate02:53

Reaction Rate

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The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...
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Reducing Line Loss01:18

Reducing Line Loss

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
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Related Rates01:18

Related Rates

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When two or more physical quantities are linked by a single relationship, a change in one variable necessarily affects the others. This interdependence forms the basis of related rates analysis, which examines how different quantities change with respect to time. A classic physical example is an expanding balloon, where the size of the balloon changes continuously as air is added.For a hot air balloon, the inflated envelope is commonly idealized as a perfect sphere to simplify mathematical...
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Speciation Rates01:07

Speciation Rates

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Overview
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Measuring Reaction Rates03:09

Measuring Reaction Rates

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Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
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Rate-Determining Steps03:08

Rate-Determining Steps

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Relating Reaction Mechanisms
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
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Related Experiment Video

Updated: Feb 12, 2026

A Protocol to Characterize the Morphological Changes of Clostridium difficile in Response to Antibiotic Treatment
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A Protocol to Characterize the Morphological Changes of Clostridium difficile in Response to Antibiotic Treatment

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Reducing Clostridium difficile Colitis Rates Via Cost-Saving Diagnostic Stewardship.

Christina Yen1, Paul Holtom1, Susan M Butler-Wu1

  • 11Los Angeles County and University of Southern California Medical Center,Los Angeles,California.

Infection Control and Hospital Epidemiology
|April 4, 2018
PubMed
Summary

Implementing diagnostic stewardship and provider education significantly reduced Clostridium difficile infection (CDI) rates by lowering C. difficile nucleic acid amplification test (NAAT) orders. This quality improvement project achieved a 2-fold reduction in NAAT orders and lower hospital CDI rates.

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A Protein Microarray Assay for Serological Determination of Antigen-specific Antibody Responses Following Clostridium difficile Infection
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Area of Science:

  • Infectious Diseases
  • Hospital Epidemiology
  • Quality Improvement Science

Background:

  • Hospital-acquired infections, particularly Clostridium difficile infection (CDI), pose a significant challenge in tertiary-care settings.
  • Accurate and appropriate diagnostic testing is crucial for managing CDI and preventing its spread.
  • Overutilization of diagnostic tests can lead to increased healthcare costs and potential misdiagnosis.

Purpose of the Study:

  • To implement and evaluate a quality improvement project aimed at reducing hospital-acquired Clostridium difficile infection (CDI) rates.
  • To assess the impact of diagnostic stewardship and provider education on CDI testing patterns.
  • To determine the effect of these interventions on overall hospital CDI rates.

Main Methods:

  • A quality improvement project was conducted at a large, public, tertiary-care academic hospital.
  • Diagnostic stewardship principles were introduced to guide appropriate C. difficile testing.
  • Provider education on CDI diagnosis and management protocols was implemented.

Main Results:

  • A 2-fold reduction in C. difficile nucleic acid amplification test (NAAT) orders was observed following the interventions.
  • A markedly lower hospital-acquired CDI rate was achieved post-implementation.
  • The study demonstrated a successful correlation between reduced NAAT orders and decreased CDI incidence.

Conclusions:

  • Diagnostic stewardship and provider education are effective strategies for reducing hospital-acquired Clostridium difficile infection (CDI) rates.
  • Optimizing diagnostic testing through stewardship can lead to significant improvements in patient outcomes and hospital epidemiology.
  • This approach offers a scalable model for other academic hospitals aiming to control CDI transmission.