Results 91 to 100 of about 2,426,974 (209)

Compact Laser-Induced Fluorescence Detector with Adjustable Laser Focal Spot for Multiple Purposes

Sensors
In many research fields, the demand for miniaturized laser-induced fluorescence (LIF) detection systems has been increasing. This work has developed a compact LIF detector, employing a laser diode as the excitation source and a photodiode as the ...
Zihe Xu, Xi Chen, Fangwu Liu
doaj   +1 more source

A note on the measurement of phase space observables with an eight-port homodyne detector

, 2007
It is well known that the Husimi Q-function of the signal field can actually be measured by the eight-port homodyne detection technique, provided that the reference beam (used for homodyne detection) is a very strong coherent field so that it can be ...
Kiukas, J., Lahti, P.
core   +1 more source

Resonant Young’s Slit Interferometer for Sensitive Detection of Low-Molecular-Weight Biomarkers

Biosensors
The detection of low-molecular-weight biomarkers is essential for diagnosing and managing various diseases, including neurodegenerative conditions such as Alzheimer’s disease.
Stefanus Renaldi Wijaya, Augusto Martins, Katie Morris, Steven D. Quinn, Thomas F. Krauss   +4 more
doaj   +1 more source

A cavity-QED scheme for Heisenberg-limited interferometry

, 2006
We propose a Ramsey interferometry experiment using an entangled state of N atoms to reach the Heisenberg limit for the estimation of an atomic phase shift if the atom number parity is perfectly determined.
Brune, Michel, Kuhr, Stefan, Raimond, Jean-Michel, Vitali, David   +3 more
core   +2 more sources

Evaluating limit of detection and quantification for higher heating value and ultimate analysis of fast-growing trees and agricultural residues biomass using NIRS

Engineering and Applied Science Research, 2023
Accurate non-destructive assessment of biomass energy properties is essential for optimizing its use as an alternative fuel. In this study, 200 biomass samples were used to determine higher heating value (HHV) and 120 biomass samples for analyzing ...
Bijendra Shrestha, Zenisha Shrestha, Jetsada Posom, Panmanas Sirisomboon, Bim Prasad Shrestha   +4 more
doaj  

The Cosmic Stellar Birth and Death Rates

, 2006
The cosmic stellar birth rate can be measured by standard astronomical techniques. It can also be probed via the cosmic stellar death rate, though until recently, this was much less precise.
Ahn, Ando, Ando, Beacom, Bionta, Bisnovatyi-Kogan, Clayton, Fukugita, Hirata, Hopkins, John F. Beacom, Krauss, Malek, Milne, Mirizzi, Schiminovich, Strigari, Strigari, Watanabe, Woosley, Yoshida, Zhang, Zhang   +22 more
core   +2 more sources

Liquid scintillation counting at the limit of detection in biogeosciences. [PDF]

Front Microbiol, 2023
Schubert F, Kallmeyer J.
europepmc   +1 more source

A Fluorescein-Based Probe for Selective Detection of ClO⁻ and Resultant Mixture as a Fluorescence Sensor for Br⁻ and I⁻

Analytica
This paper presents the design and evaluation of a fluorescent probe based on fluorescein hydrazide for the selective detection of hypochlorite (ClO−), bromide (Br−), and iodide (I−) ions in solution.
Maksim N. Zavalishin, Gleb A. Nikitin, Vladimir S. Osokin, George A. Gamov   +3 more
doaj   +1 more source

Highly Sensitive Detection of Chymotrypsin Using Gold Nanoclusters with Peptide Sensors

Micromachines
Pancreatic function tests are used to determine the presence of chronic pancreatitis, particularly in the early stage of the disease. Chymotrypsin is an indicator of pancreatic function and is thus related to pancreatic diseases.
Siyuan Zhou, Cheng Liu, Haixia Shi, Li Gao   +3 more
doaj   +1 more source

Development and Validation of Novel HPLC Methods for Quantitative Determination of Vitamin D3 in Tablet Dosage Form

Pharmaceuticals
In the present work, an efficient isocratic HPLC method was developed for the precise and accurate estimation of vitamin D3 in tablet form. The chromatographic conditions comprised an L3 silica column (5 µm in particle size, 4.6 mm × 250 mm) with a ...
Muhammad Saqib Gohar, Taj Ur Rahman, Ali Bahadur, Ashraf Ali, Sarah Alharthi, Nora Hamad Al-Shaalan   +5 more
doaj   +1 more source