Results 31 to 40 of about 2,419,010 (304)

Detection of amplitude modulation with squeezed light for sensitivity beyond the shot-noise limit [PDF]

open access: yes, 1988
An improvement in precision beyond the limit set by the vacuum-state or zero-point fluctuations of the electromagnetic field is reported for the detection of amplitude modulation encoded on a weak signal beam. The improvement is achieved by employing the
Kimble, H. J., Wu, Ling-An, Xiao, Min
core   +1 more source

Molecularly Imprinted Electrochemical Sensor-Based Fe2O3@MWCNTs for Ivabradine Drug Determination in Pharmaceutical Formulation, Serum, and Urine Samples

open access: yesFrontiers in Bioengineering and Biotechnology, 2021
Ivabradine hydrochloride (IVR) is a medically important drug because of its ability to lower the heart rate. Techniques reported for IVR determination were expensive, laborious, besides being of poor selectivity.
Fatehy M. Abdel-Haleem   +11 more
doaj   +1 more source

Learning Something From Nothing: The Critical Importance of Rethinking Microbial Non-detects

open access: yesFrontiers in Microbiology, 2018
Accurate estimation of microbial concentrations is necessary to inform many important environmental science and public health decisions and regulations.
Alex Ho Shing Chik   +4 more
doaj   +1 more source

Luminescent method for determination of nanoscale particles of rare earth elements with sulfosalicylic acid derivatives

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2022
It was of interest to search for luminescent reactions to terbium in complexes with sulfosalicylic acid derivatives and to enhance them by studying the effect of third components (aminopolycarboxylic acids, organic bases and surfactants).
S.A. Elcheparova, A.A. Kokoevа
doaj   +1 more source

Review on the Analysis and Testing Method of Typical Plant Growth Regulators in Environment

open access: yesYankuang ceshi, 2023
Plant growth regulators (PGRs) are defined as naturally occurring or artificially synthesized compounds. The functions of PGRs mainly include accelerating or delaying seed germination, breaking plant dormancy, stimulating or reducing bud elongation ...
HU Xiaolei   +4 more
doaj   +1 more source

Comparing the fundamental limit of detection for interferometric and resonant biosensors with coherent phase read-out [PDF]

open access: yes, 2019
We compare the limit of detection of coherently interrograted photonic biosensors, using both interferometric and resonant architectures.Universidad de Málaga.
Halir, Robert   +4 more
core   +1 more source

Ratiometric Sensor Based on PtOEP-C6/Poly (St-TFEMA) Film for Automatic Dissolved Oxygen Content Detection

open access: yesSensors, 2020
A ratiometric oxygen sensor based on a platinum octaethylporphyrin (PtOEP)–coumarin 6 (C6)/poly (styrene-trifluoroethyl methacrylate) (poly (St-TFEMA)) film was developed for automatic dissolved oxygen (DO) detection. The oxygen-sensing film according to
Honglin Zhang, Zhiguo Zhang
doaj   +1 more source

In-vitro Study for Cerenkov Luminescence Imaging Application in Hepatic Metastasectomy

open access: yesFrontiers in Physics, 2021
Cerenkov luminescence imaging (CLI) has been recently proposed as a method to visualize surgical margins in the operating theater, immediately after resection, to allow refining surgery in a single procedure. Our group is preparing a pilot clinical study
Esther Ciarrocchi   +10 more
doaj   +1 more source

Quantum state magnification

open access: yes, 2016
Quantum metrology exploits entangled states of particles to improve sensing precision beyond the limit achievable with uncorrelated particles. All previous methods required detection noise levels below this standard quantum limit to realize the benefits ...
Engelsen, N. J.   +3 more
core   +1 more source

Sub-shot-noise shadow sensing with quantum correlations [PDF]

open access: yes, 2017
The quantised nature of the electromagnetic field sets the classical limit to the sensitivity of position measurements. However, techniques based on the properties of quantum states can be exploited to accurately measure the relative displacement of a ...
Edgar, Matthew P.   +5 more
core   +1 more source

Home - About - Disclaimer - Privacy