Scale Harvesting
Scale Harvesting - Related Videos
02:41
pH Scale
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2020
Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
12:29
Sterile Tissue Harvest
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2016
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN In 1959 The 3 R's were introduced by W.M.S. Russell and R.L. Burch in their book The Principles of Humane Experimental Technique. The 3 R's are replacement, reduction, and refinement of the use of animals in research. The use of cell lines and tissue cultures that originated from research animals is a replacement technique, as it allows for many experiments to be conducted in vitro. Harvesting...
21:15
Diagnostic Necropsy and Tissue Harvest
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2016
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN Many animal experiments rely on final data collection time points that are gathered from the harvesting and testing of organs and tissues. The use of appropriate methods for the collection of organs and tissues can impact the quality of the samples and the analysis of the data that is gleaned for the testing of the tissues. The method of euthanasia of the animal can also impact the quality of...
04:03
Harvesting of Peroneus Longus Tendon Autograft
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Cited by 1 •
2025
This article provides a method for safely harvesting the full-thickness peroneus longus tendon autograft. It outlines critical steps, modifications, and troubleshooting for the procedure.
06:53
Selective Harvesting of Marginating-hepatic Leukocytes
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Cited by 1 •
2016
Marginating-hepatic leukocytes exhibit unique characteristics and distinct immunological functions compared to other leukocyte populations. Here we describe a method for selective harvesting of this specific hepatic cell population, through forced perfusion of the liver of rats or mice. Marginating-hepatic leukocytes seem critical in determining susceptibility to hepatic-related diseases and metastases.
FAQs
Annuli are growth rings examined under magnification. Researchers use their number and pattern to estimate age and evaluate growth rate, provided that scales are collected and handled consistently. Comparing these features among specimens can reveal differences in growth within a population or across sampling periods, making annulus interpretation useful for fisheries and aquatic studies.
Sampling a defined body region reduces variation caused by collecting scales from different locations on the same organism. Consistent placement makes scale features more comparable among specimens, populations, and time periods. This standardization strengthens estimates of age, growth, and population structure by ensuring that observed differences are less likely to reflect inconsistent sampling.
Scale material can support structural, ecological, and molecular analyses. In addition to examining annuli, researchers may use prepared scales for chemical or genetic assays, depending on the study objective. This broader analytical value allows one collection approach to contribute both visible growth information and laboratory-based evidence about organisms or populations.
After removal, scales are cleaned and preserved before analysis. Preparation helps maintain material suitable for examining growth rings under magnification and for possible chemical or genetic assays. The handling sequence matters because standardized cleaning and preservation improve data quality, allowing results from different specimens or sampling periods to be compared more reliably.
Researchers first collect scales from a defined body region, then clean and preserve the material before examination or laboratory analysis. They may inspect annuli under magnification and use the same samples for chemical or genetic assays when appropriate. Applying the same workflow across specimens limits handling variation and supports consistent interpretation.
Scale sampling is useful when researchers need estimates of age, growth rate, population structure, or environmental history. Because scales can support both magnified structural examination and chemical or genetic assays, the approach can address multiple research questions. Standardized sampling also enables comparisons among populations and across time, which is important for interpreting ecological patterns.