Solid Plate Protocol
Solid Plate Protocol - Related Videos
06:13
Solid Plate-based Dietary Restriction in Caenorhabditis elegans
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Cited by 19 •
2011
Here we present a protocol for performing solid plate-based dietary restriction in C. elegans with killed bacteria.
02:37
Metallic Solids
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2020
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties. All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
11:37
Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism
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Cited by 5 •
2017
This article provides a detailed procedure on the solid-phase synthesis, purification, and characterization of dodecamers of RNA modified at the C2'-O-position. UV-vis and circular dichroism photometric analyses are used to quantify and characterize structural aspects, i.e., single-strands or double-strands.
02:22
Structures of Solids
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2020
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
02:18
Network Covalent Solids
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2020
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds. To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
FAQs
Spatial separation allows cells from the inoculum to grow in distinct locations rather than forming one undifferentiated mass. Each visible colony can then be examined as a separate growth site, which supports the isolation of pure cultures. This separation also makes it possible to compare the number and appearance of colonies across samples or experimental conditions.
The agar surface provides both physical support and nutrients for microbial growth. Its firmness keeps the distributed inoculum in place, allowing cells to multiply locally and remain spatially separated. Because growth occurs on a defined surface, researchers can observe visible colonies directly and use the resulting pattern to support culture maintenance, isolation, or comparison.
Incubation conditions determine whether the transferred microorganisms can grow sufficiently to produce visible colonies. If conditions support growth, colony development allows researchers to assess recovery and compare samples. Applying different growth conditions can reveal differences in microbial growth, making incubation an important variable when interpreting whether a sparse, dense, or absent colony pattern reflects the experimental treatment.
Streaking and spreading are two ways to distribute a measured inoculum across the agar surface. Both aim to separate cells spatially, but they use different distribution patterns. The selected approach affects how the inoculum is arranged and therefore how readily distinct colonies appear. Researchers can choose between them according to the intended isolation or counting outcome.
A typical workflow begins with a measured microbial sample, transfers it to nutrient-containing solid agar, and distributes it across the surface by streaking or spreading. The plate is then incubated under conditions that support growth before the resulting colonies are examined. This sequence connects controlled inoculum handling with observable growth and later analysis.
Colony counts provide an estimate of viable cell numbers because cells capable of growing under the selected conditions produce visible colonies. Researchers can count these colonies after incubation and compare the values among samples or treatments. The result reflects growth detected by the chosen medium and incubation conditions, making consistent handling important for meaningful comparisons.
In biology, the method supports several complementary tasks: isolating pure cultures, maintaining microbial cultures, identifying growth based on colony development, and analyzing experimental differences. Its value comes from linking a controlled surface-based growth step to visible, countable outcomes. Researchers can therefore use the same general approach for routine culture work and comparative studies of microbial growth.