Culture Medium Preparation
Culture Medium Preparation - Related Videos
07:18
Bone Conditioned Medium: Preparation and Bioassay
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Cited by 13 •
2015
We describe here how to prepare bone-conditioned medium (BCM) and test its activity in vitro.
02:08
Generating Pure Bacterial Cultures in a Liquid Medium
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2025
Source: Brumfield, K. D. et. al., Laboratory Techniques Used to Maintain and Differentiate Biotypes of Vibrio cholerae Clinical and Environmental Isolates. J. Vis. Exp. (2017)This video demonstrates the growth of bacterial cultures in a liquid medium. Shaking promotes aeration and distributes nutrients evenly, supporting exponential growth and resulting in a uniform, metabolically active suspension suitable for downstream applications.
09:16
Medium-scale Preparation of Drosophila Embryo Extracts for Proteomic Experiments
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Cited by 4 •
2017
The goal of this protocol is to provide a straightforward and inexpensive approach to collecting Drosophila embryos at medium scale (0.5-1 g) and preparing protein extracts that can be used in downstream proteomic applications, such as affinity purification-mass spectrometry (AP-MS).
02:48
Preparation of Artificial Sputum Medium to Emulate Cystic Fibrosis Lung Sputum Ex Vivo
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2025
Source: Vieira, J., et al. Design and Development of a Model to Study the Effect of Supplemental Oxygen on the Cystic Fibrosis Airway Microbiome. J. Vis. Exp. (2021).This video demonstrates the preparation of an artificial sputum medium that mimics the viscosity, nutrient composition, and pH of cystic fibrosis lung sputum. The resulting medium provides a physiologically relevant platform for ex vivo studies.
09:05
Generation of Oligodendrocytes and Oligodendrocyte-Conditioned Medium for Co-Culture Experiments
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Cited by 8 •
2020
Herein, we display an efficient method for the purification of oligodendrocytes and production of oligodendrocyte-conditioned medium that can be used for co-culture experiments.
FAQs
Nutrients, salts, water, and growth factors collectively determine whether a medium can maintain the intended cells, tissues, or microorganisms. Their selection should match the biological system and the experimental objective, because different cultures require different chemical support. An appropriate formulation promotes consistent growth or maintenance, whereas an unsuitable combination can compromise cell-based assays, microbial cultivation, or tissue studies.
pH and osmolarity help establish the controlled chemical and physical environment required by the culture. If either condition is inappropriate, the medium may not support reliable maintenance or growth even when its nutrients are present. Adjusting these properties before sterilization and storage makes the prepared medium more consistent for experiments involving cells, tissues, or microorganisms.
Sterilization reduces the risk that unwanted organisms will enter the prepared medium and alter the experiment. Contamination can change the culture environment and interfere with observations of physiology, disease-related responses, drug effects, or environmental responses. For this reason, sterilization is a critical control step rather than a separate convenience, and storage conditions must also preserve the medium's suitability.
The overview identifies both nutrient-rich solutions and solid materials as formats for culture media. This distinction allows researchers to select a physical form suited to the system being studied, whether they are cultivating microorganisms, maintaining cells, or supporting tissues. The chosen format becomes part of the controlled environment and can influence how the culture is handled and observed.
Preparation begins by combining the selected nutrients, salts, water, and, when needed, growth factors. The formulation is then adjusted for pH and osmolarity, sterilized to limit contamination, and stored under conditions that preserve its intended use. These steps create a reproducible medium that can be introduced into microbial, cell, tissue, or assay workflows.
A formulation can include nutrients, salts, water, and growth factors, with the combination chosen for the cells, tissues, or microorganisms being maintained. The preparation also requires attention to pH, osmolarity, sterilization, and storage. Considering these components together helps provide a stable chemical and physical setting rather than treating nutrient selection as the only important decision.
Prepared media support microbial cultivation, cell-based assays, tissue culture, and genetic studies. They also provide a controlled setting for investigating physiology, disease, and responses to drugs or environmental conditions. Because the medium can be formulated and maintained under defined conditions, it helps researchers compare biological outcomes while reducing the influence of uncontrolled chemical, physical, or contamination-related factors.