Hole Punch
Hole Punch - Related Videos
02:20
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This video demonstrates a punch biopsy procedure to create a precise wound in a mouse model. The excision exposes the subcutaneous layer of the skin, providing a suitable site for studying immune responses to localized pathogen infection.
01:10
Detection of Black Holes
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Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s. Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light. Not until the 1960s, when the first neutron...
00:09
Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
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Cited by 14 •
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The goal of the protocol is to enable visualization of the detailed flow fields and determination of the near-boundary shear and normal stresses within an equilibrium scour hole induced by a vibrating pipeline.
04:37
Sampling Prostate Cancer Tissue for Biobanking: An MRI-guided Targeted Technique to Remove Biopsy Punches from Fresh Tumor Tissue
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06:25
Fabrication of a Master Mold for Microneedles with a Micron-sized Air-vent Hole
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2025
This article introduces a unique method for fabricating master molds with an air-vent hole to prevent air entrapment during viscous polymer casting, enabling the fabrication of gelatin microneedles with sharp tips. By reducing the casting volume of high-viscosity gelatin, thin-walled hollow pyramidal microneedles could also be fabricated.
FAQs
Controlled pressure transfers force from the sharp cylindrical edge through the specimen and into a firm support. This backing resists deformation as the edge advances, helping the cut follow a defined path rather than producing irregular tearing. In biological sampling, that mechanical control matters because it limits damage around the opening and yields material suitable for consistent comparisons.
Uniform dimensions make measurements more comparable because each disc or tissue piece begins with a similar sampled area and shape. When samples differ, observed treatment effects may reflect unequal starting material rather than biology. Using a Hole Punch therefore supports quantitative analysis by reducing variation introduced during collection, which is especially valuable when multiple treatments or specimens must be compared.
The cylindrical edge determines the geometry of the collected material: it can produce a circular opening or a uniform disc rather than an irregular fragment. That repeatable geometry supports workflows in which sample size must remain consistent across specimens. The same principle also applies when creating reproducible openings in membranes or laboratory materials for biological procedures.
To prepare a standardized sample, position the specimen, place it against a firm support, align the punch with the intended sampling area, and apply controlled pressure until the edge passes through. The resulting disc or opening can then be used in the selected assay or workflow. Consistent alignment and force help maintain comparable dimensions across repeated samples.
In photosynthesis and transport assays, leaf discs provide a defined unit for comparing treatments. A Hole Punch produces discs with consistent shapes, allowing differences observed during the assay to be interpreted against more comparable starting samples. The technique is therefore useful in teaching laboratories as well as research workflows that require repeated measurements from plant material.
For tissue collection, the key outcome is a sample with a deliberately standardized shape and size rather than an unrestricted fragment. This can make samples easier to compare across specimens and conditions. Hole punches are also relevant to membrane and laboratory-material workflows, where reproducible openings help establish consistent experimental starting conditions.