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Bending of Members Made of Several Materials

Bending of Members Made of Several Materials

In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...

Classifying Matter by Composition

Classifying Matter by Composition

Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...

Composition of Blood

Composition of Blood

The blood in our bodies comprises three major components: blood plasma, formed elements, and the extracellular matrix. Blood plasma is a yellowish fluid that constitutes 55% of the total blood volume. It is primarily made up of water and essential substances such as electrolytes and proteins. Blood plasma serves as a medium for transporting blood cells and also contains nutrients, enzymes, hormones, antibodies, and gases.
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Composite Bodies

Composite Bodies

A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
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Members Made of Elastoplastic Material

Members Made of Elastoplastic Material

The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...

Genetic Material

Genetic Material

Within the human body, a complex and detailed system of trillions of cells works in unison to sustain life. Each cell houses a nucleus, which contains 46 chromosomes divided into 23 pairs. Chromosomes are highly coiled structures made of the genetic material DNA. These chromosomes are essential carriers of genetic information, with half inherited from the mother through her egg and the other half from the father's sperm, combining to create the unique genetic makeup of an individual.

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Related Experiment Video

Updated: Jan 23, 2026

In Vitro and In Vivo Delivery of Magnetic Nanoparticle Hyperthermia Using a Custom-Built Delivery System

In Vitro and In Vivo Delivery of Magnetic Nanoparticle Hyperthermia Using a Custom-Built Delivery System

Published on: July 2, 2020

Magnetic and hydrogel composite materials for hyperthermia applications.

L L Lao¹, R V Ramanujan

¹School of Materials Engineering, Nanyang Technological University, Singapore 639798.

Journal of Materials Science. Materials in Medicine

|November 2, 2004

Summary

This study shows that magnetic hydrogels with iron oxide nanoparticles can generate heat for hyperthermia. Heating is controllable by nanoparticle concentration and magnetic field strength, reaching therapeutic temperatures.

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The Synthesis of RGD-functionalized Hydrogels as a Tool for Therapeutic Applications

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In Vitro and In Vivo Delivery of Magnetic Nanoparticle Hyperthermia Using a Custom-Built Delivery System

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The Synthesis of RGD-functionalized Hydrogels as a Tool for Therapeutic Applications

The Synthesis of RGD-functionalized Hydrogels as a Tool for Therapeutic Applications

Published on: October 7, 2016

Area of Science:

Biomaterials Science
Nanotechnology
Medical Physics

Background:

Hyperthermia therapy offers a promising approach for cancer treatment.
Developing efficient and controllable heating agents is crucial for hyperthermia applications.
Magnetic nanoparticles offer potential for targeted heating via alternating magnetic fields.

Purpose of the Study:

To investigate the hyperthermia potential of micron-sized iron oxide (Fe3O4) magnetic nanoparticles dispersed in a polyvinyl alcohol hydrogel.
To analyze the heating characteristics of the resulting ferrogel under an alternating magnetic field (AMF).

Main Methods:

Dispersion of Fe3O4 nanoparticles within a polyvinyl alcohol hydrogel matrix.
Exposure of the ferrogel to an alternating magnetic field at 375 kHz.
Measurement of temperature changes, specific absorption rate (SAR), and analysis of heating mechanisms.

Main Results:

The ferrogel achieved stable maximum temperatures between 43-47°C within 5-6 minutes.
Generated heat was dependent on Fe3O4 content and magnetic field amplitude.
Specific absorption rate (SAR) reached up to 8.7 W/g Fe3O4, influenced by magnetic field strength.

Conclusions:

The developed ferrogel demonstrates effective heat generation for potential hyperthermia applications.
Hysteresis loss is identified as the primary mechanism contributing to the observed heating effect.
Tunable heating properties allow for control via Fe3O4 concentration and AMF parameters.