Sterile Cotton Balls
Sterile Cotton Balls - Related Videos
05:40
Fabricating Cotton Analytical Devices
0 Views •
2016
To investigate simple fabrication approaches for multiple assay needs, we created a fluid-absorbing channel system made of cotton material. This device was used to establish a multiple detection platform, and solve contamination issues that commonly affect lateral flow-based biomedical devices, for clinical urinalysis of nitrite, total protein, and urobilinogen.
12:29
Sterile Tissue Harvest
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2016
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN In 1959 The 3 R's were introduced by W.M.S. Russell and R.L. Burch in their book The Principles of Humane Experimental Technique. The 3 R's are replacement, reduction, and refinement of the use of animals in research. The use of cell lines and tissue cultures that originated from research animals is a replacement technique, as it allows for many experiments to be conducted in vitro. Harvesting...
01:46
Developing Neuron Balls Using a Hanging Drop Culture Technique
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2025
This video demonstrates the process of generating neuron balls using a hanging drop culture technique. Within the hanging drops, cells move towards the bottom, self-assembled into three-dimensional structures forming neuron balls, which can be used for neurobiological studies.
05:04
Bouncing Ball with a Uniformly Varying Velocity in a Metronome Synchronization Task
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Cited by 3 •
2017
The purpose of this protocol is to introduce the application of a bouncing ball with a uniformly varying velocity in a metronome synchronization task.
10:18
Agrobacterium-Mediated Virus-Induced Gene Silencing Assay In Cotton
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Cited by 159 •
2011
We present the detailed protocol for Agrobacterium-mediated virus-induced gene silencing (VIGS) assay in cotton. The tobacco rattle virus (TRV)-derived VIGS vectors were deployed to induce RNA silencing of cotton GrCLA1, Cloroplastos alterados 1 gene. The albino phenotype caused by silencing GrCLA1 was observed at the seedling stage within 2 weeks after inoculation.
FAQs
The interwoven cotton fibers create spaces that take up and retain liquids. This makes sterile cotton balls useful for applying a liquid, absorbing excess material, or cleaning a small area without requiring a rigid instrument. Their absorbency supports controlled handling during biological tasks, although the amount held depends on how much liquid is applied.
Sterility matters because an opened or mishandled cotton ball can introduce microorganisms to a sample, culture, or work surface. Keeping the package sealed until use preserves the intended aseptic condition, meaning steps are arranged to minimize contamination. This is especially relevant when biological material must remain separate from environmental microbes.
A disposable format is valuable when absorbent material is needed for a single biological task and should not be carried between samples or surfaces. After contact with biological materials, the cotton ball is discarded rather than retained for later use. This practice limits the opportunity for transferred material or microorganisms to move into subsequent work.
An aseptic workflow begins by keeping the package closed until the cotton ball is needed, then using it for the intended cleaning, application, collection, or coverage task. After contact with biological material, discard it instead of returning it to the package or reusing it. This sequence helps preserve aseptic conditions and reduces cross-contamination during laboratory work.
Sterile cotton balls support specimen collection when a disposable absorbent material is appropriate. They can help handle collected material without introducing a previously used item into later work. Because contact with biological material requires disposal, the collection step should be planned around single use, supporting aseptic handling and reducing cross-contamination.
Biology teaching and research settings can use them for several small-scale tasks: gentle cleaning, applying liquids, collecting specimens, and covering small areas. These applications take advantage of two properties together, absorbency for liquid management and sterile preparation for contamination control. The supplies are most suitable when the task needs disposable absorbent material rather than a reusable laboratory implement.