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Related Concept Videos

Bones of the Upper Limb: Radius01:09

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The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
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The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
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The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side...
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Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
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Related Experiment Video

Updated: Apr 7, 2026

Author Spotlight: A Tailor-Made Sample Preparation Approach for Enhanced MALDI-IMS Analysis of Hard Palm Seeds
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Henrique da Rocha Lima.

Fred Bernardes Filho1, João Carlos Regazzi Avelleira1

  • 1Santa Casa da Misericórdia do Rio de Janeiro, Instituto de Dermatology Prof. Rubem David Azulay, Rio de Janeiro, RJ, Brazil.

Anais Brasileiros De Dermatologia
|July 2, 2015
PubMed
Summary

Henrique da Rocha Lima, a pioneering Brazilian physician, discovered the typhus agent. His research significantly advanced studies on tropical diseases like yellow fever and Chagas disease.

Area of Science:

  • Medical Research
  • Tropical Medicine
  • Infectious Diseases

Background:

  • Henrique da Rocha Lima (1879-1956) was a distinguished Brazilian physician and researcher.
  • He earned his M.D. in 1901 and specialized in Clinical Medicine in Germany.
  • Lima was instrumental in promoting Brazilian scientific medicine internationally, particularly from the Oswaldo Cruz Institute.

Discussion:

  • Lima's work spanned multiple critical areas of infectious disease research.
  • He identified the causative agent of typhus, a significant breakthrough in understanding the disease.
  • His contributions were vital to the study of yellow fever, Chagas disease, Carrión's disease, and histoplasmosis.

Key Insights:

  • Discovery of the typhus pathogen.
  • Major advancements in understanding and combating tropical diseases.

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  • Enhanced Brazil's international scientific reputation through groundbreaking research.

    • Outlook:

    • Lima's legacy continues to inspire research in infectious diseases.
    • His discoveries laid the groundwork for future diagnostic and therapeutic strategies.
    • Further exploration of his methodologies could yield new insights into neglected tropical diseases.