Results 271 to 280 of about 128,355 (337)

Draft genomes of three abundant bacterial isolates from hypersaline Don Juan Pond, Antarctica. [PDF]

Microbiol Resour Announc
Shaffer JMC, Jarratt A, Boles BW, Mikucki JA.   +3 more
europepmc   +1 more source

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Portable Fluorometer for Cyanobacteria Detection

IEEE Sensors Journal, 2017
A portable system for fluorescence measurement has been developed for cyanobacteria detection. Exploiting commercially available low-cost photodiodes and a single 9 V supply, the system was able to measure two fluorescence emissions simultaneously. Output voltages resulting from the fluorescence intensity were measured by utilizing two quantum dots of ...
Seung-Hoon Kim, Ying He, Eun-Hee Lee, Jeong-Ho Kim, Sung Min Park   +4 more
openaire   +2 more sources

A low-cost and portable fluorometer based on an optical pick-up unit for chlorophyll-a detection.

Talanta: The International Journal of Pure and Applied Analytical Chemistry, 2023
Chlorophyll-a (Chl-a) fluorescence detection is an important technique for monitoring water quality. In this work, we proposed an approach that employs the mass-produced low-cost optical pick-up unit (OPU) extracted from the high-definition digital ...
Xu Chen, Jing Du, Saima Kanwal, Zhi-Jin Yang, Luyang Zheng, Jian Wang, Jing Wen, Dawei Zhang   +7 more
semanticscholar   +1 more source

Chlorophyll Fluorometer for Intelligent Water Sampling by a Small Uncrewed Aircraft System (sUAS)

Applied Spectroscopy, 2022
We describe a waterproof, lightweight (1.3 kg), low-power (∼1.1 W average power) fluorometer operating on 5 V direct current deployed on a small uncrewed aircraft system (sUAS) to measure chlorophyll and used for triggering environmental water sampling ...
Caitlyn M. English, Zechariah B. Kitzhaber, K. R. I. Sanim, Michail Kalaitzakis, B. Kosaraju, J. Pinckney, M. Hodgson, Nikolaos I. Vitzilaios, T. Richardson, M. Myrick   +9 more
semanticscholar   +1 more source

Fluorometer Control and Readout Using an Arduino Nano 33 BLE Sense Board

Applied Spectroscopy, 2022
We describe the control and interfacing of a fluorometer designed for aerial drone-based measurements of chlorophyll-a using an Arduino Nano 33 BLE Sense board.
Zechariah B. Kitzhaber, Caitlyn M. English, K. R. I. Sanim, Michail Kalaitzakis, B. Kosaraju, M. Hodgson, Nikolaos I. Vitzilaios, T. Richardson, M. Myrick   +8 more
semanticscholar   +1 more source

Filter Fluorometer Calibration Without the Fluorometer

Applied Spectroscopy, 2023
We recently described a lightweight, low-power, waterproof filter fluorometer using a 180° backscatter geometry for chlorophyll-a (chl- a) detection. Before it was constructed it was modeled to ensure it would have satisfactory performance. This manuscript repeats the modeling process that allows the calibration slope and detection limit for a ...
Caitlyn M. English, Zechariah B. Kitzhaber, Kazi Ragib I. Sanim, Nikolaos Vitzilaios, Michael E. Hodgson, Tammi L. Richardson, Michael L. Myrick   +6 more
openaire   +2 more sources

Reliability of Aqueous Flare Measurements During Uveitis by a Spot Fluorometer

Journal of Ocular Pharmacology and Therapeutics, 2021
Purpose: To evaluate the reliability of intensity of light scatter (ILS) for diagnosing mild-to-moderate uveitis, which is difficult to score by the subjective standardized uveitis nomenclature (SUN) grading.
Sirisha Tadepalli, Hadiya P Farhath, R. Sudhir, P. Padmanabhan, J. Biswas, Sangavi Saravana, Mehal Rathore, S. Paneerselvam, A. Ravikumar, S. P. Srinivas   +9 more
semanticscholar   +1 more source

Smartphone-based fluorometer for pH detection using green synthesized carbon dots

, 2021
As a group of heavy-metal-free fluorescent nanomaterials, carbon dots (CDs) have recently received a growing interest as they have high optical absorption activity and are chemically stable, biocompatible, and less toxic.
Leila Moradloo Azad, H. Ehtesabi, A. Rezaei   +2 more
semanticscholar   +1 more source

Predicting cyanobacterial biovolumes from phycocyanin fluorescence using a handheld fluorometer in the field.

Harmful Algae, 2020
Toxic cyanobacterial blooms are becoming more prevalent in freshwater systems, increasing the need for monitoring to protect human health. Phycocyanin fluorescence sensors have been developed as tools for providing fast and cost-effective proxy ...
Georgia Thomson‐Laing, Jonathan Puddick, S. Wood   +2 more
semanticscholar   +1 more source

Video fluorometer

Review of Scientific Instruments, 1979
Details of a unique computer controlled multichannel fluorometer are given. Features include: a novel optical system enabling simultaneous acquistion of excitation and emission data over broad spectral ranges, a highly sensitive silicon intensified target (SIT) vidicon detector, and a video interface to a minicomputer allowing data acquisition at the ...
D W, Johnson, J A, Gladden, J B, Callis, G D, Christian   +3 more
openaire   +2 more sources