Diameter Breast Height
Diameter Breast Height - Related Videos
10:18
Multi-step Variable Height Photolithography for Valved Multilayer Microfluidic Devices
0 Views •
Cited by 24 •
2017
Multilayer microfluidic devices often involve the fabrication of master molds with complex geometries for functionality. This article presents a complete protocol for multi-step photolithography with valves and variable height features tunable to any application. As a demonstration, we fabricate a microfluidic droplet generator capable of producing hydrogel beads.
07:13
Initiation of Metastatic Breast Carcinoma by Targeting of the Ductal Epithelium with Adenovirus-Cre: A Novel Transgenic Mouse Model of Breast Cancer
0 Views •
Cited by 24 •
2014
Activation of latent mutations with adenovirus-Cre into the mammary ductal system results in a clinically relevant metastatic breast cancer. Incorporation of a YFP promoter allows tracking of distal metastatic tumor cells. This model is useful to study latent metastasis, anti-tumor immunity, and for designing novel immunotherapies to treat breast cancer.
10:10
Long-term Culture of Human Breast Cancer Specimens and Their Analysis Using Optical Projection Tomography
0 Views •
Cited by 11 •
2011
We have developed a collagen-based in vitro assay which promotes proliferation and invasion from samples of all breast cancer subtypes. Optical Projection Tomography, a three dimensional microscopy technique was utilised to visualise and quantify tumour expansion. This assay may be used to quantify drug response of individual tumour samples.
11:37
Propeller Characterization: Variations in Pitch, Diameter, and Blade Number on Performance
0 Views •
2023
Source: Shreyas Narsipur, Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC A propeller is a twisted airfoil, where the angle of the chord changes with respect to the location, along the radial station, as shown in Figure 1. Propellers are widely used in aircraft and watercraft propulsion systems thereby necessitating detailed characterizations of propellers to design high performance vehicles. Figure 1. Chord, thickness, and pitch at a radial station. One of...
09:36
Changes in Mammary Gland Morphology and Breast Cancer Risk in Rats
0 Views •
Cited by 61 •
2010
Our protocol describes how to dissect the rat abdominal mammary gland and how to prepare mammary gland whole mounts. It also describes how to analyze mammary gland morphology using three end-points (number of terminal end buds, epithelial elongation and differentiation) and to use these results to predict mammary cancer risk in rats which were exposed to dietary modifications in utero or during prepuberty.
FAQs
Using a consistent reference height makes measurements comparable among trees, plots, and survey dates. That consistency allows researchers to distinguish differences in stem size from differences caused by where a person measured the trunk. In environmental studies, standardized DBH data therefore support reliable descriptions of forest structure and more defensible comparisons of tree growth or stand composition over time.
Stem form determines whether the standard point can be used directly. Buttresses, swelling, or other irregularities can distort the trunk dimension at 1.3 meters, so the measurement location must be adjusted rather than recorded mechanically at that height. Accounting for these deviations matters because unrecognized changes in measurement position can reduce consistency across trees and field teams.
DBH becomes more informative when interpreted with tree height, species identity, and plot data. The diameter supplies a standardized size variable, while the additional measurements place that size in a biological and spatial context. Together, these data help characterize stand composition and support estimates of biomass and carbon storage, rather than treating stem diameter as a complete description of a forest.
A basic field workflow uses a diameter tape to measure the stem, or uses trunk circumference to calculate diameter. The observer identifies the intended measurement point, checks whether buttresses or swelling affect it, and adjusts the location when necessary. Applying the same approach throughout a survey produces a more consistent dataset for forest inventories and ecological plots.
Larger stem diameters provide a size measure that can be incorporated into estimates of tree biomass and carbon storage. Those estimates become more useful when paired with tree height, species identity, and plot information, because the resulting dataset links individual-tree measurements with forest composition and structure. This supports quantification in inventories and environmental change studies.
Field researchers can use these measurements in forest inventories, habitat assessments, forest health monitoring, ecological surveys, and studies of environmental change. Their value increases when combined with plot-level information, because the data reveal patterns in tree size and stand composition that help researchers assess forest structure and condition across an area.