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Related Concept Videos

Guidelines for Writing Outcome01:11

Guidelines for Writing Outcome

When developing expected outcomes for a patient care plan, the nurse should adhere to the following recommendations:
Patient outcomes reflect the patient's response to the goal rather than what the nurse aims to achieve. Terminology should be observable and measurable to avoid the reader's interpretation. The desired outcome should be realistic and achievable in the designated care timeframe. Expected outcomes should align with adjunctive therapies. The outcome should enhance care evaluation by...
Leaving Groups02:14

Leaving Groups

The nature of leaving groups strongly influences the outcome of a nucleophilic substitution reaction.
In general, in a nucleophilic substitution reaction, a nucleophile displaces a functional group, called the leaving group, from the substrate to give a substituted product. A leaving group departs the substrate molecule through heterolytic cleavage, taking the pair of electrons with it to become a relatively stable weak base in the form of an anion or a neutral molecule.  
In a nucleophilic...
Free-falling Bodies: Introduction01:07

Free-falling Bodies: Introduction

All objects, neglecting air resistance, fall with the same acceleration towards the Earth's center due to the force exerted by the Earth's gravity. This experimentally determined fact is unexpected because we are so accustomed to the effects of air resistance and friction that we expect light objects to fall slower than heavier ones. People believed that a heavier object had a greater acceleration when falling until Galileo Galilei (1564–1642) proved otherwise. We now know this is not the case.
Fixation and Sectioning01:03

Fixation and Sectioning

Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens.
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The Retina01:32

The Retina

The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
The Endoplasmic Reticulum01:43

The Endoplasmic Reticulum

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Related Experiment Video

Updated: May 27, 2026

Dissection of Imaginal Discs from 3rd Instar Drosophila Larvae
07:36

Dissection of Imaginal Discs from 3rd Instar Drosophila Larvae

Published on: February 17, 2007

Afterword.

Thomas R Frieden1

  • 1Centers for Disease Control and Prevention and Agency for Toxic Substances and Disease Registry, 1600 Clifton Road, NE, MS D-14, Atlanta, GA 30333, USA.

American Journal of Epidemiology
|December 3, 2011
PubMed
Summary
This summary is machine-generated.

Alexander Langmuir pioneered the Epidemic Intelligence Service (EIS) and Epi-Aid investigations at the Centers for Disease Control and Prevention (CDC). His innovative public health strategies remain vital for addressing contemporary health challenges.

Related Experiment Videos

Last Updated: May 27, 2026

Dissection of Imaginal Discs from 3rd Instar Drosophila Larvae
07:36

Dissection of Imaginal Discs from 3rd Instar Drosophila Larvae

Published on: February 17, 2007

Area of Science:

  • Epidemiology
  • Public Health
  • Infectious Disease Control

Background:

  • Alexander Langmuir established the Epidemic Intelligence Service (EIS) in 1949, becoming the first chief epidemiologist at the Communicable Disease Center (CDC).
  • Langmuir developed the "Epi-Aid" model for epidemic-assistance investigations, a cornerstone of CDC's early work.

Observation:

  • The article highlights the enduring significance of Langmuir's innovations, including the EIS and Epi-Aids.
  • Langmuir's contributions underscore the CDC's evolution from a communicable disease-focused agency to a comprehensive global health organization.

Findings:

  • The Epidemic Intelligence Service (EIS) and Epi-Aid investigations are identified as pivotal contributions by Alexander Langmuir.
  • These foundational elements of the CDC demonstrate remarkable relevance to current public health issues.

Implications:

  • Langmuir's work exemplifies the critical role of epidemiological investigation and rapid response in public health.
  • The enduring legacy of his innovations continues to inform the CDC's broad engagement with global health challenges.