Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Lewis Symbols and the Octet Rule02:36

Lewis Symbols and the Octet Rule

85.0K
Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis developed a model called the Lewis model that simplified the depiction of chemical bond formation and provided straightforward explanations for the chemical bonds seen in most common compounds.
85.0K
Lewis Structures and Formal Charges02:19

Lewis Structures and Formal Charges

24.1K
Lewis symbols can be used to indicate the formation of covalent bonds, which are shown in Lewis structures—drawings that describe the bonding in molecules and polyatomic ions. The periodic table can be used to predict the number of valence electrons in an atom and the number of bonds that will be formed to reach an octet. Group 18 elements, such as argon and helium, have filled electron configurations and thus rarely participate in chemical bonding. However, atoms from group 17, such as...
24.1K
Lewis Acids and Bases02:33

Lewis Acids and Bases

49.6K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
49.6K
Lewis Acids and Bases02:16

Lewis Acids and Bases

18.0K
This lesson delves into Lewis acids and bases in the context of the octet rule for electron-deficient compounds. Here, the concept is discussed, emphasizing the group 13 elements like boron or aluminium. Since group 13 elements possess three valence electrons, they form trivalent compounds with a sextet of electrons and a vacant orbital for the central atom. Consequently, these electron-deficient compounds accept electrons from other species to complete their octet in a chemical reaction. They...
18.0K
Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

48.0K
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
48.0K
Lethal Alleles02:41

Lethal Alleles

19.1K
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
19.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Exercise Guidelines for the Elderly (Part 2 of 2).

The Physician and sportsmedicine·2016
Same author

Exercise and Cardiac Complications.

The Physician and sportsmedicine·2016
Same author

A Longitudinal Study of Cardiovascular Stability in Active Men Aged 45 to 65 Years.

The Physician and sportsmedicine·2016
Same author

Exercise-Related Sudden Death: Cardiovascular Evaluation of Exercisers (Part 2 of 2).

The Physician and sportsmedicine·2016
Same author

The Effect of Physical Activity and Inactivity on Aerobic Power in Older Men (A Longitudinal Study).

The Physician and sportsmedicine·2016
Same author

Exercise and Sudden Death.

The Physician and sportsmedicine·2016
Same journal

Injury surveillance during the 2024 under-20's Men's European Field Lacrosse Championships.

The Physician and sportsmedicine·2026
Same journal

Understanding health insurance and the delay in care for partial meniscectomies: a comparison between public and private coverage.

The Physician and sportsmedicine·2026
Same journal

Injury incidence and risk factors in youth American football versus soccer: a national emergency department analysis.

The Physician and sportsmedicine·2026
Same journal

Links between concussion history, hypertension, and hypertension contributing factors among adolescent football athletes.

The Physician and sportsmedicine·2026
Same journal

Core muscle endurance and balance as predictors of lateral ankle sprain in adolescent team-sport athletes: a prospective cohort study.

The Physician and sportsmedicine·2026
Same journal

Impact of Achilles tendon rupture on performance and career outcomes in NFL players: a matched cohort study.

The Physician and sportsmedicine·2026
See all related articles

Related Experiment Video

Updated: Mar 17, 2026

Assaying the Kinase Activity of LRRK2 in vitro
06:09

Assaying the Kinase Activity of LRRK2 in vitro

Published on: January 18, 2012

23.0K

What Can We Learn From Reggie Lewis' Death?

S P Van Camp

    The Physician and Sportsmedicine
    |July 19, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Sudden athlete deaths can cause fear, but sports physicians should counsel patients that exercise risks are lower than inactivity risks. Maintaining physical activity is crucial for patient health, despite rare tragic events.

    More Related Videos

    5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat
    08:50

    5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat

    Published on: July 3, 2013

    24.5K
    An Ivor Lewis Esophagectomy Designed to Minimize Anastomotic Complications and Optimize Conduit Function
    09:40

    An Ivor Lewis Esophagectomy Designed to Minimize Anastomotic Complications and Optimize Conduit Function

    Published on: April 17, 2020

    15.4K

    Related Experiment Videos

    Last Updated: Mar 17, 2026

    Assaying the Kinase Activity of LRRK2 in vitro
    06:09

    Assaying the Kinase Activity of LRRK2 in vitro

    Published on: January 18, 2012

    23.0K
    5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat
    08:50

    5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat

    Published on: July 3, 2013

    24.5K
    An Ivor Lewis Esophagectomy Designed to Minimize Anastomotic Complications and Optimize Conduit Function
    09:40

    An Ivor Lewis Esophagectomy Designed to Minimize Anastomotic Complications and Optimize Conduit Function

    Published on: April 17, 2020

    15.4K

    Area of Science:

    • Sports Medicine
    • Cardiology
    • Public Health

    Background:

    • High-profile athlete deaths, such as Reggie Lewis, can incite public fear and speculation.
    • Sports physicians face challenges in counseling patients post-event without complete data.

    Purpose of the Study:

    • To advise sports physicians on appropriate responses to athlete deaths.
    • To emphasize the importance of continued exercise for patient health.

    Main Methods:

    • Review of the Reggie Lewis case and its public perception.
    • Analysis of risks associated with exercise versus inactivity.

    Main Results:

    • Fear and finger-pointing often overshadow rational assessment following athlete fatalities.
    • The risks of sedentary behavior significantly outweigh the risks associated with regular physical activity.

    Conclusions:

    • Sports physicians must exercise restraint and provide evidence-based guidance.
    • Patients should be reassured that the benefits of exercise far exceed potential risks.