Comparison of Droplet Spectra of Fluorescent Tracers Commonly used to Measure Pesticide Deposition and Drift

2009 ◽  
pp. 115-115-14 ◽  
Author(s):  
RA Downer ◽  
LM Kirchner ◽  
FR Hall ◽  
BL Bishop
Keyword(s):  
Fluorescent Tracers ◽  
Pesticide Deposition

scholarly journals Fabrication of polyethylene terephthalate (PET) nanoparticles with fluorescent tracers for studies in mammalian cells

2021 ◽  
Author(s):  
Leah M. Johnson ◽  
Jeffrey B. Mecham ◽  
Sai Archana Krovi ◽  
Maria M. Moreno Caffaro ◽  
Shyam Aravamudhan ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Mammalian Cells ◽  
Hydrodynamic Diameter ◽  
Fluorescent Nanoparticles ◽  
Fluorescent Tracers ◽  
Bottom Up

Fluorescent nanoparticles (NPs) comprising polyethylene terephthalate (PET) with a hydrodynamic diameter of 158 ± 2 nm were synthesized in a bottom-up approach.

Polarization-resolved single-molecule tracking reveal strange dynamics of individual fluorescent tracers through a deep rubbery polymer network

2021 ◽  
Author(s):  
Jaladhar Mahato ◽  
Sukanya Bhattacharya ◽  
Dharmendar Kumar Sharma ◽  
Arindam Chowdhury
Keyword(s):  
Single Molecule ◽  
Local Structure ◽  
Biological Systems ◽  
Polymer Network ◽  
Soft Materials ◽  
Complex Environments ◽  
Fluorescent Tracers ◽  
Single Molecule Tracking ◽  
Structure And Dynamics

Tracking the movement of fluorescent single-molecule (SM) tracers has provided several new insights on the local structure and dynamics in complex environments such as soft materials and biological systems. However,...

scholarly journals Development, characterization, and applications of multi-material stereolithography bioprinting

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bagrat Grigoryan ◽  
Daniel W. Sazer ◽  
Amanda Avila ◽  
Jacob L. Albritton ◽  
Aparna Padhye ◽  
...  
Keyword(s):  
Material Selection ◽  
Cell Types ◽  
Fluorescent Tracers ◽  
Regional Feature ◽  
Multicellular Aggregates ◽  
Distinct Cell ◽  
Adenocarcinoma Cells ◽  
Mammalian Tissues ◽  
Heterotypic Interactions ◽  
Feature Alignment

AbstractAs a 3D bioprinting technique, hydrogel stereolithography has historically been limited in its ability to capture the spatial heterogeneity that permeates mammalian tissues and dictates structure–function relationships. This limitation stems directly from the difficulty of preventing unwanted material mixing when switching between different liquid bioinks. Accordingly, we present the development, characterization, and application of a multi-material stereolithography bioprinter that provides controlled material selection, yields precise regional feature alignment, and minimizes bioink mixing. Fluorescent tracers were first used to highlight the broad design freedoms afforded by this fabrication strategy, complemented by morphometric image analysis to validate architectural fidelity. To evaluate the bioactivity of printed gels, 344SQ lung adenocarcinoma cells were printed in a 3D core/shell architecture. These cells exhibited native phenotypic behavior as evidenced by apparent proliferation and formation of spherical multicellular aggregates. Cells were also printed as pre-formed multicellular aggregates, which appropriately developed invasive protrusions in response to hTGF-β1. Finally, we constructed a simplified model of intratumoral heterogeneity with two separate sub-populations of 344SQ cells, which together grew over 14 days to form a dense regional interface. Together, these studies highlight the potential of multi-material stereolithography to probe heterotypic interactions between distinct cell types in tissue-specific microenvironments.

scholarly journals Imaging of β-amyloid plaques by near infrared fluorescent tracers: a new frontier for chemical neuroscience

2015 ◽  
Vol 44 (7) ◽  
pp. 1807-1819 ◽  
Author(s):  
Matteo Staderini ◽  
María Antonia Martín ◽  
Maria Laura Bolognesi ◽  
J. Carlos Menéndez
Keyword(s):  
Near Infrared ◽  
Amyloid Plaques ◽  
Fluorescent Tracers ◽  
Non Invasive ◽  
Nir Imaging ◽  
New Frontier ◽  
Invasive Method ◽  
Β Amyloid

Near infrared (NIR) imaging is a promising and non-invasive method to visualize amyloid plaquesin vivo.

A contribution to toxicity of fluorescent tracers

2020 ◽  
pp. 69-75
Author(s):  
Ch. Leibundgut ◽  
S. Hadi
Keyword(s):  
Fluorescent Tracers

scholarly journals Badanie stabilności barwnych znaczników fluorescencyjnych w silnie zasiarczonych wodach złożowych

Nafta-Gaz ◽  
2021 ◽  
Vol 77 (2) ◽  
pp. 82-91
Author(s):  
Katarzyna Wojtowicz ◽  
Keyword(s):  
Standard Deviation ◽  
Relative Standard Deviation ◽  
Rhodamine B ◽  
Water Reservoir ◽  
Distilled Water ◽  
Test Results ◽  
Fluorescent Tracers ◽  
Reservoir Water ◽  
Relative Standard

The article presents the issues related to the determination of colored fluorescent tracers such as fluorescein, eosin yellowish, rhodamine B and uranine in reservoir waters by spectrophotometric method. For this purpose, the influence of the pH of the solution on the absorption spectra of the tested tracers was checked. Test results show that fluorescein, rhodamine B and uranine are sensitive to changes in the buffer pH, therefore it is advisable to use stable tracer solutions as well as to control and possibly correct pH in further tests. As part of the study, calibration curves of fluorescein, eosin yellowish, rhodamine B and uranine in distilled water, reservoir water A4 and highly sulfated reservoir waters A5 and A6 were plotted and the analytical methods were validated. Analytical validation included determination of linearity, standard deviation and relative standard deviation of the tested tracers solutions. High values of the regression parameters (0.9927–0.9998) of the analyzed tracers prove a good linear fit, while low values of standard deviation and relative standard deviation prove its repeatability and precision. Particular attention was paid to testing the stability of colored fluorescent tracers in highly sulfated reservoir waters. For this purpose, solutions of the tested tracers were prepared at concentrations of 10 mg/dm3 in distilled water, A4 reservoir water and highly sulfated A5 and A6 reservoir waters. Measurements of the tested tracers in the prepared solutions were performed every 2 days over the period of 1 month. The test results show that fluorescein, eosin yellowish, rhodamine B and uranine solutions are stable in the distilled water and A4 reservoir water, while they degrade in the A5 and A6 reservoir waters. Fluorescein and uranine turned out to be the most sensitive, as they degraded completely in the A6 reservoir water after 20 (fluorescein) and 22 (uranine) days. Yellowish eosin and rhodamine B turned out to be slightly more stable in highly sulfated reservoir waters, as they degraded completely in the A6 reservoir water after 24 days.

Sensitive Novel Fluorescent Tracers for Environmental Monitoring

2007 ◽  
Author(s):  
P. Pollard ◽  
M. Adams ◽  
G.R. Prabhu ◽  
S. Officer ◽  
C. Hunter
Keyword(s):  
Environmental Monitoring ◽  
Fluorescent Tracers
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