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

Design Example: Marking Boundaries of a Site Using a Compass01:12

Design Example: Marking Boundaries of a Site Using a Compass

Marking site boundaries using a compass is a precise surveying technique that ensures the accuracy of boundary delineation. The process begins by using provided site details, including the bearings and lengths of each boundary line. The initial step involves calculating latitudes and departures for all sides of the site. This computation verifies that the traverse is free of errors, ensuring a closed and accurate boundary.The process starts at a known point, such as Point A, which is often...
Areas Within Irregular Boundaries01:26

Areas Within Irregular Boundaries

Calculating areas within irregular boundaries, such as along rivers or curved roads, is crucial in various fields, including surveying, engineering, and environmental management. Surveyors often begin by creating a traverse, a connected series of straight lines approximating the area's boundary. The coordinates of each traverse point are essential for calculating the enclosed area. The double meridian distance formula is a widely used technique for this purpose. This method utilizes the...
Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
Habitat Fragmentation02:31

Habitat Fragmentation

Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
Methods of Obtaining Topography01:25

Methods of Obtaining Topography

Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
Taping Over Different Ground Profiles01:12

Taping Over Different Ground Profiles

Taping over varying ground profiles requires careful adaptation to achieve accurate measurements. On smooth, level ground with minimal vegetation, the tape can rest directly on the ground. Here, the taping team, typically consisting of a head and a rear tapeman, coordinates their positions with clear communication. The rear tapeman holds the tape at the starting point and guides the head tapeman toward a range pole placed beyond the endpoint, using hand or voice signals to ensure alignment.On...

You might also read

Related Articles

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

Sort by
Same author

Mechanistic insights into coordinated var transcriptional switching in malaria parasites.

The EMBO journal·2026
Same author

Shifting metabolism alters rRNA expression in malaria parasites.

Trends in parasitology·2026
Same author

A subset of Plasmodium falciparum RIFINs is linked to severe malaria risk reduction and engages LILRB1 through a conserved structural motif.

EBioMedicine·2025
Same author

The molecular basis of coordinated antigen switching enabling chronic infection by human malaria parasites.

bioRxiv : the preprint server for biology·2025
Same author

scRNA-seq reveals transcriptional plasticity of var gene expression in Plasmodium falciparum for host immune avoidance.

Nature microbiology·2025
Same author

Generation of Population-Level Diversity in <i>Anaplasma phagocytophilum msp2/p44</i> Gene Repertoires Through Recombination.

Pathogens (Basel, Switzerland)·2025

Related Experiment Video

Updated: Jun 23, 2026

Photorealistic Learned Landscapes for Augmented Reality
06:54

Photorealistic Learned Landscapes for Augmented Reality

Published on: June 27, 2025

varDB: common ground for a shifting landscape.

David R Allred1, Anthony F Barbet, J David Barry

  • 1Department of Infectious Diseases and Pathology, University of Florida, Gainesville, FL 32611, USA. allredd@vetmed.ufl.edu

Trends in Parasitology
|May 9, 2009
PubMed
Summary

Antigenic variation, a survival mechanism for pathogens, is studied through variant proteins. The varDB database offers data and tools for analysis, but its full potential is limited, requiring critique for scientific advancement.

More Related Videos

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
09:44

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon

Published on: October 16, 2018

Related Experiment Videos

Last Updated: Jun 23, 2026

Photorealistic Learned Landscapes for Augmented Reality
06:54

Photorealistic Learned Landscapes for Augmented Reality

Published on: June 27, 2025

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
09:44

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon

Published on: October 16, 2018

Area of Science:

  • Microbiology
  • Immunology
  • Bioinformatics

Background:

  • Antigenic variation is a common pathogen survival strategy.
  • This phenomenon involves changes in variant proteins, impacting pathogen-host interactions.
  • Understanding these variations is crucial for developing effective treatments.

Purpose of the Study:

  • To review the varDB database, which catalogs variant proteins.
  • To assess the database's utility for analyzing protein structures and functions related to pathogen survival.
  • To identify limitations and propose improvements for varDB.

Main Methods:

  • Database review and critique.
  • Analysis of sequence data and available tools within varDB.
  • Literature review on antigenic variation and pathogen survival.

Main Results:

  • varDB contains extensive sequence data for variant proteins.
  • Existing tools facilitate some aspects of data analysis.
  • Significant limitations hinder the database's comprehensive utility.

Conclusions:

  • varDB has potential for studying pathogen survival mechanisms.
  • Critique and improvements are necessary to fully leverage varDB's resources.
  • Enhancing varDB will better serve the scientific community in understanding antigenic variation.