Colony Diameter
Colony Diameter - Related Videos
06:44
Keratinocyte Colony Formation Assay: An In Vitro Assay to Assess the Ability of Keratinocytes to Grow into Colonies
0 Views •
2023
In this video, we perform a clonogenic assay of keratinocytes harvested from adult mice to determine the ability of individual cells to proliferate and form colonies. This keratinocyte harvesting technique is useful for studying other downstream aspects of cutaneous chemical carcinogenesis and tumor promotion.
11:37
Propeller Characterization: Variations in Pitch, Diameter, and Blade Number on Performance
0 Views •
2023
Source: Shreyas Narsipur, Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC A propeller is a twisted airfoil, where the angle of the chord changes with respect to the location, along the radial station, as shown in Figure 1. Propellers are widely used in aircraft and watercraft propulsion systems thereby necessitating detailed characterizations of propellers to design high performance vehicles. Figure 1. Chord, thickness, and pitch at a radial station. One of...
09:04
Yeast Colony Embedding Method
0 Views •
Cited by 7 •
2011
A method for embedding yeast colonies allowing sectioning for light and electron microscopy. This protocol allows determination of the distribution of sporulated cells and pseudohyphal cells within colonies providing a new tool toward understanding the organization of cell types within a fungal community.
14:39
A Quantitative Assay for Insulin-expressing Colony-forming Progenitors
0 Views •
Cited by 11 •
2011
A three-dimensional clonogenic assay that allows pancreatic-like progenitors to differentiate into insulin-expressing colonies is described. This method takes advantage of semi-solid media containing methylcellulose, Matrigel and growth factors, in which single progenitors proliferate and differentiate in vitro, permitting quantification of the number of functional progenitors in a population.
04:04
Measuring Retinal Vessel Diameter from Mouse Fluorescent Angiography Images
0 Views •
Cited by 2 •
2023
Mouse retinal vasculature is particularly interesting in understanding the mechanisms of vascular pattern formation. This protocol automatically measures the diameter of mouse retinal vessels from fluorescent angiography fundus images at a fixed distance from the optic disk.
FAQs
Changes in colony diameter can reflect population expansion as cells divide and spread across a solid culture medium. The measured width therefore provides a practical way to follow growth under defined conditions. Interpreting the measurement requires considering incubation time, nutrient availability, temperature, and other environmental conditions, because each can influence the observed size.
Incubation time affects how long cells have to divide and spread across the culture surface. A measurement taken earlier may not represent the same stage of growth as one taken later. Consequently, comparisons are most meaningful when measurements account for incubation time, especially when researchers evaluate growth differences among strains or experimental conditions.
When microbial strains grow under comparable culture conditions, differences in colony diameter can provide a basis for characterizing their growth behavior. Such comparisons help researchers examine variation in microbial physiology and population expansion. Nutrient availability, temperature, incubation time, and other environmental factors should remain considered because they may also contribute to differences in the measured width.
A basic assessment begins by growing microorganisms together on a solid culture medium and allowing visible colonies to develop under the selected conditions. Researchers then measure the width of the colony and compare that value across strains, incubation times, environmental conditions, or treatments. This workflow supports standardized analysis of growth in culture-based experiments.
In antibiotic-response experiments, researchers compare colony diameter between cultures exposed to the treatment and cultures examined under a comparison condition. Differences in measured width can indicate that the microorganisms responded differently during growth. The approach allows treatment effects to be assessed alongside factors such as incubation time, temperature, and nutrient availability.
Colony-diameter measurements can contribute to analyses of microbial physiology, environmental influences, and experimental outcomes. By comparing widths across controlled conditions, researchers can examine how microorganisms grow and how their growth differs among strains or treatments. This makes the measurement useful in culture-based biology studies that require a practical, standardized indicator of growth.