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

What is Population Genetics?01:25

What is Population Genetics?

64.5K
A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
64.5K
Conservation of Small Populations02:04

Conservation of Small Populations

16.7K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
16.7K
Population Growth00:57

Population Growth

28.0K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
28.0K
What are Populations and Communities?00:30

What are Populations and Communities?

37.3K
Overview
37.3K
Classification of Titrimetric Analysis Based on Reaction Types01:01

Classification of Titrimetric Analysis Based on Reaction Types

1.5K
Titrimetric analysis in solution chemistry involves measuring the volume of solutions and is often called volumetric analysis. The standard solution of known concentration in the burette is called the titrant, whereas the solution of unknown concentration in the flask is called the analyte, or titrand. Titrimetric analyses can be classified into four types based on the reactions between the titrant and analyte.
Titrations between an acid and a base lead to neutralization reactions that form...
1.5K
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

414
Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
414

You might also read

Related Articles

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

Sort by
Same author

Proliferative Diabetic Retinopathy Incidence and Outcomes in Younger Patients from 1970 to 2019.

Ophthalmology. Retina·2026
Same author

Delayed removal of a cat claw from the caruncle of a pediatric patient.

Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus·2026
Same author

Effect of inferior turbinate infracture on outcomes of probing for congenital nasolacrimal duct obstruction.

Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus·2025
Same author

Incidence and clinical characteristics of pediatric traumatic hyphema from 2000 to 2009 in a population-based cohort.

Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus·2025
Same author

Stereopsis in children with fully versus partially accommodative esotropia.

Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus·2025
Same author

Lyme Neuroborreliosis Presenting with Isolated Intracranial Hypertension: A Case Report.

Case reports in neurology·2025

Related Experiment Video

Updated: Jan 22, 2026

An Orthotopic Sciatic Nerve Xenograft for Neurofibromatosis Type 1 Neurofibromas
03:53

An Orthotopic Sciatic Nerve Xenograft for Neurofibromatosis Type 1 Neurofibromas

Published on: October 10, 2025

448

Neurofibromatosis Type 1: A Population-Based Study.

Bashar M Bata, David O Hodge, Brian G Mohney

    Journal of Pediatric Ophthalmology and Strabismus
    |July 20, 2019
    PubMed
    Summary
    This summary is machine-generated.

    Neurofibromatosis type 1 (NF1) affects 1.2 per 100,000 individuals, with common symptoms including café-au-lait macules. This study found a lower incidence of optic nerve gliomas in NF1 patients than previously reported.

    More Related Videos

    Author Spotlight: Collecting the Brain and Serum from the Same Mice Fetus to Study Brain Tumor Development
    05:44

    Author Spotlight: Collecting the Brain and Serum from the Same Mice Fetus to Study Brain Tumor Development

    Published on: May 17, 2024

    1.0K
    Genotypic Inference of HIV-1 Tropism Using Population-based Sequencing of V3
    11:10

    Genotypic Inference of HIV-1 Tropism Using Population-based Sequencing of V3

    Published on: December 27, 2010

    12.7K

    Related Experiment Videos

    Last Updated: Jan 22, 2026

    An Orthotopic Sciatic Nerve Xenograft for Neurofibromatosis Type 1 Neurofibromas
    03:53

    An Orthotopic Sciatic Nerve Xenograft for Neurofibromatosis Type 1 Neurofibromas

    Published on: October 10, 2025

    448
    Author Spotlight: Collecting the Brain and Serum from the Same Mice Fetus to Study Brain Tumor Development
    05:44

    Author Spotlight: Collecting the Brain and Serum from the Same Mice Fetus to Study Brain Tumor Development

    Published on: May 17, 2024

    1.0K
    Genotypic Inference of HIV-1 Tropism Using Population-based Sequencing of V3
    11:10

    Genotypic Inference of HIV-1 Tropism Using Population-based Sequencing of V3

    Published on: December 27, 2010

    12.7K

    Area of Science:

    • Genetics
    • Neurology
    • Ophthalmology

    Background:

    • Neurofibromatosis type 1 (NF1) is a genetic disorder affecting multiple systems.
    • Understanding NF1 incidence and clinical features is crucial for patient management.
    • Population-based studies provide valuable epidemiological data.

    Purpose of the Study:

    • To determine the incidence and demographics of NF1 in a defined population.
    • To describe the clinical manifestations of NF1, including common symptoms and tumors.
    • To compare the occurrence of specific NF1-related conditions, like optic nerve gliomas, with previous findings.

    Main Methods:

    • Retrospective review of medical records for Olmsted County, Minnesota residents diagnosed with NF1 between 1980 and 2009.
    • Analysis of patient demographics, de novo mutation rates, and clinical features.
    • Calculation of incidence rates and mean ages for diagnosis and follow-up.

    Main Results:

    • An incidence of 1.2 per 100,000 individuals was observed.
    • Café-au-lait macules (98%) and neurofibromas (52%) were the most common manifestations.
    • A lower-than-expected rate of optic nerve gliomas (5.9%) was noted.

    Conclusions:

    • The prevalence and de novo mutation rate of NF1 align with prior research.
    • The incidence of optic nerve gliomas in this cohort was significantly lower than previously reported.
    • Further research may be needed to understand variations in NF1 clinical presentation.