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Colloidal precipitates

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...

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Related Experiment Video

Updated: Jul 8, 2025

A Silver Nanoparticle Method for Ameliorating Biliary Atresia Syndrome in Mice

A Silver Nanoparticle Method for Ameliorating Biliary Atresia Syndrome in Mice

Published on: October 13, 2018

Chitosan coating silver nanoparticles as a promising feed additive in broilers chicken.

Eman I Hassanen¹, Ahmed M Hussien², Sally Mehanna³

¹Pathology Department, Faculty of Veterinary Medicine, Cairo University, P.O.Box 12211, Giza, Egypt. eme_amr@cu.edu.eg.

BMC Veterinary Research

|December 9, 2023

Summary

Chitosan-coated silver nanoparticles (CS/Ag-NCs) at 0.5 ppm significantly improve broiler growth and immunity without harmful residues or lesions. This dosage offers a safe and effective approach for poultry farming.

Keywords:

Broilers Histopathology Immunology Nanoparticles Performance

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Area of Science:

Animal Science
Nanotechnology in Agriculture
Poultry Nutrition and Health

Background:

Silver nanoparticles (AgNPs) show promise for enhancing poultry performance but raise concerns about safety and residues.
Chitosan coating may mitigate AgNP aggregation and reduce silver accumulation in edible tissues.
Evaluating the efficacy and safety of chitosan-modified silver nanoparticles is crucial for broiler production.

Purpose of the Study:

To assess the impact of chitosan-coated silver nanoconjugates (CS/Ag-NCs) on broiler growth, feed conversion, and immune response.
To investigate the potential of CS/Ag-NCs to prevent oxidative stress-related lesions and silver residues in broiler organs.
To determine the optimal dosage of CS/Ag-NCs for broiler supplementation.

Main Methods:

Cobb broiler chicks were orally administered distilled water, silver nanoparticles (AgNPs) at 0.5 and 5 ppm, or CS/Ag-NCs at 0.5 and 5 ppm weekly for 36 days.
Growth performance (body weight gain, feed conversion ratio), feeding/drinking behavior, antibody titers against ND and AI viruses, and histological examinations of organs were evaluated.
Silver content in edible organs was quantified to assess residue levels.

Main Results:

CS/Ag-NCs groups showed significantly improved body weight gain and feed conversion ratio compared to AgNPs and control groups.
Histological analysis revealed no adverse effects or lesions in organs treated with CS/Ag-NCs, unlike the 5 ppm AgNPs group.
CS/Ag-NCs administration led to higher antibody titers against ND and AI viruses, and reduced silver accumulation in edible tissues.

Conclusions:

0.5 ppm CS/Ag-NCs is recommended for broiler farms to enhance growth performance and immune status.
Chitosan coating effectively reduces silver aggregation and potential toxicity in broiler organs.
CS/Ag-NCs offer a safe and effective alternative for improving poultry health and productivity.