Sanasilva Crown Transparency
Sanasilva Crown Transparency - Related Videos
02:36
Crown Ethers
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2023
Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules take.
10:50
Assessment of Immunologically Relevant Dynamic Tertiary Structural Features of the HIV-1 V3 Loop Crown R2 Sequence by ab initio Folding
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Cited by 10 •
2010
The crown region of different V3 loop sequences of the surface envelope glycoprotein (gp120) of HIV-1 can be structurally characterized in many cases by in silico folding of positions 10 to 22 of the loop using a state-of-the-art ab initio folding algorithm. Here we demonstrate the folding and evaluation of this region of the V3 loop from the R2 strain of HIV-1, a uniquely neutralization sensitive strain with puzzling functional properties.
10:27
Fabrication of Nano-engineered Transparent Conducting Oxides by Pulsed Laser Deposition
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Cited by 15 •
2013
We describe the experimental method to deposit nanostructured oxide thin films by nanosecond Pulsed Laser Deposition (PLD) in the presence of a background gas. By using this method Al-doped ZnO (AZO) films, from compact to hierarchically structured as nano-tree forests, can be deposited.
07:28
Imaging Cell Viability on Non-transparent Scaffolds — Using the Example of a Novel Knitted Titanium Implant
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Cited by 6 •
2016
Here we present a fluorophore based imaging technique to detect cell viability on a non-transparent titanium scaffold as well as to detect glimpses of the scaffold impurities. This protocol troubleshoots the drawback of imaging cell-cell or cell-metal interactions on non-transparent scaffolds.
26:16
Patterning Cells on Optically Transparent Indium Tin Oxide Electrodes
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Cited by 1 •
2007
Non-fouling PEG silane monolayer was desorbed from individually addressable ITO electrodes on glass by application of a reductive potential. Electrochemical stripping of PEG-silane layer from ITO microelectrodes allowed for cell adhesion to take place in a spatially defined fashion, with cellular patterns corresponding closely to electrode patterns.
FAQs
Percentage classes convert a visual impression into a structured observation that can be recorded consistently. Instead of relying only on descriptive terms such as sparse or dense, observers assign crowns to defined ranges of apparent transparency. This standardization supports comparisons among individual trees, forest sites, and survey years, making patterns in tree condition easier to identify.
Sky visibility reflects how effectively the crown’s foliage obscures the background. Sparse or missing foliage produces a more transparent appearance, while fuller foliage blocks more of the sky. Assessing this visual feature gives monitoring teams a practical indicator of crown condition without requiring measurements of every leaf, branch, or part of the tree.
Repeated observations allow the same type of crown condition information to be compared across time. Changes in recorded transparency can reveal temporal patterns, while differences among locations can show spatial patterns. These comparisons support assessments of environmental stress and help identify longer-term changes affecting forest ecosystems, although the indicator itself records crown appearance rather than a single confirmed cause.
Crown transparency provides one observable signal of tree condition that can be incorporated into broader forest monitoring. When observations are collected across trees and locations, they help identify areas or periods with differing levels of apparent foliage loss. This information can contribute to evaluations of forest health and to the detection of environmental patterns that merit further study.
An observer views the tree crown in the field and evaluates the proportion that appears transparent because foliage is sparse, missing, or does not obscure the sky. The observer then assigns the crown to the appropriate percentage class. Applying the same visual assessment approach to each tree creates records suitable for comparison within and between surveys.
Researchers can use the measure when they need a comparable field indicator of tree condition across forest sites or survey years. It is especially useful in monitoring programs that examine spatial differences, temporal change, environmental stress, or long-term forest ecosystem trends. Its value increases when observations are repeated using the same standardized assessment approach.
Survey results can show how crown transparency varies among individual trees, locations, and years. These data may reveal areas with contrasting tree condition, changes occurring over time, or broader patterns associated with environmental stress. Because the observations are standardized, they can support comparisons and trend assessment rather than serving only as isolated visual descriptions.