Results 21 to 30 of about 2,735,595 (303)
PCR-Independent Detection of Bacterial Species-Specific 16S rRNA at 10 fM by a Pore-Blockage Sensor. [PDF]
, 2016 A PCR-free, optics-free device is used for the detection of Escherichia coli (E. coli) 16S rRNA at 10 fM, which corresponds to ~100-1000 colony forming units/mL (CFU/mL) depending on cellular rRNA levels.
Banda, Anisha +7 more
core +1 more source
Sensors, 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
Fundamental Limitation on the Detectability of Entanglement [PDF]
Phys. Rev. Lett. 129, 230503 (2022), 2022 Entanglement detection is essential in quantum information science and quantum many-body physics. It has been proved that entanglement exists almost surely for a random quantum state, while the realizations of effective entanglement criteria usually consume exponential resources, and efficient criteria often perform poorly without prior knowledge. This
arxiv +1 more source
Journal of Integrative Agriculture, 2022 Denitrification-induced nitrogen (N) losses from croplands may be greatly increased by intensive fertilization. However, the accurate quantification of these losses is still challenging due to insufficient available in situ measurements of soil ...
Yan LIU +9 more
doaj
A Solid Trap and Thermal Desorption System with Application to a Medical Electronic Nose
Sensors, 2008 In this paper, a solid trap/thermal desorption-based odorant gas condensation system has been designed and implemented for measuring low concentration odorant gas. The technique was successfully applied to a medical electronic nose system.
Xuntao Xu +5 more
doaj +1 more source
A converyor belt-based small article pollution monitoring instrument and performance test
He jishu, 2022 Background At present, most of the contamination detection equipments for small items in domestic nuclear power plants are manually putting in and taking out the testing items, and the operation time is long and the steps are relatively tedious ...
QIAO Minjuan +6 more
doaj +1 more source
Quantum-optical communication rates through an amplifying random medium [PDF]
, 2002 We study the competing effects of stimulated and spontaneous emission on the information capacity of an amplifying disordered waveguide. At the laser threshold the capacity reaches a "universal" limit, independent of the degree of disorder.
A. L. Moustakas +23 more
core +4 more sources
Learning Something From Nothing: The Critical Importance of Rethinking Microbial Non-detects
Frontiers 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
Compact hollow waveguide mid-infrared gas sensor for simultaneous measurements of ambient CO2 and water vapor [PDF]
, 2020 A compact, sensitive and stable hollow waveguide (HWG) mid-infrared gas sensor, based on gas absorption lines using wavelength modulation spectroscopy with a second harmonic (WMS-2f) detection scheme, was developed for simultaneous measurements of ...
Chen, Weidong +7 more
core +3 more sources
Calibration of Tritium Microcalorimeter and Calorimetric Verification of Tritium Samples
Journal of Isotopes, 2023 Radioactive isotope decay gives off heat, which is an important basis for calculating the activity of radioactive isotope. In order to measure the heat emitted by tritium decay, the detection limit test, working curve calibration and tritium sample ...
OUYANG Huiping;YUAN Xiaoming;HE Changshui;LI Zhuoxi;ZHANG Peixu;YANG Hongguang
doaj +1 more source