Cryomold Preparation
Cryomold Preparation - Related Videos
08:16
Preparation and Analysis of In Vitro Three Dimensional Breast Carcinoma Surrogates
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Cited by 6 •
2016
We demonstrate a method to generate 3D breast cancer surrogates, which can be cultured using a perfusion bioreactor system to deliver oxygen and nutrients. Following growth, surrogates are fixed and processed to paraffin for evaluation of parameters of interest. The evaluation of one such parameter, cell density, is explained.
04:23
Frozen Skin Tissue Block Preparation: A Protocol to Preserve Cutaneous Melanoma Samples from Murine Dorsal Skin
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2023
This video describes the detailed protocol for isolating melanoma-containing murine dorsal skin, followed by cryo-embedding to prepare a frozen skin tissue block. The cryo-embedded tissue block can be sectioned and microscopically examined to study melanoma progression.
03:00
Preparation of Epoxides
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2023
Overview Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization. Epoxidation with Peroxy Acids Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
01:29
Preparation of Amides
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2023
Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC). The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent. Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
01:12
Preparation of Nitriles
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2023
One of the common methods to prepare nitriles is the dehydration of amides. This method requires strong dehydrating agents like phosphorous pentoxide or boiling acetic anhydride for converting amides to nitriles. Another reagent namely, thionyl chloride also accomplishes the dehydration of amides, where amide acts as a nucleophile. The first step of the mechanism involves the nucleophilic attack by the amide on the thionyl chloride to form an intermediate. In the next step, the electron pairs...
FAQs
Orientation determines which anatomical and pathological relationships appear in each section. In heterogeneous tumors, positioning can preserve meaningful spatial relationships between distinct tissue regions, supporting more reproducible assessment of morphology and localized signals. A poorly chosen orientation may make those relationships harder to interpret, even when the block can still be sectioned successfully.
Freezing conditions influence whether the embedded specimen forms a stable block suitable for thin cryostat sections. Rapid freezing is important because the preparation must support sectioning while preserving tissue structure and molecular targets. Consistent conditions therefore affect both physical section quality and the reliability of downstream histology, immunofluorescence, and molecular assays.
It surrounds the specimen and becomes part of the frozen block, providing support during cryostat sectioning. Its role is therefore structural rather than analytical: it helps stabilize the positioned tissue so thin sections can be obtained while the specimen's morphology and molecular targets remain available for subsequent examination.
Two decisions are especially important: orienting the specimen deliberately within the mold and controlling the freezing conditions. Orientation affects the spatial relationships captured in sections, whereas freezing affects block stability and preservation. Together, these choices help produce sections that are more suitable for consistent morphological, biomarker, nucleic-acid, and protein-expression analyses.
Prepared sections can support tumor morphology assessment and localization of biomarkers through histology and immunofluorescence. They can also be used for examining nucleic acids and protein expression with molecular assays. Because the tissue remains spatially organized, these readouts can be interpreted in relation to the original arrangement of heterogeneous tumor regions.
Careful preparation helps retain spatial relationships within tumors that contain different regions or cell populations. This matters because morphology, biomarker localization, nucleic acids, and protein expression may vary across the specimen. A stable, well-oriented block therefore supports reproducible sectioning and lets cancer researchers relate molecular or fluorescent signals to tissue structure.