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Measuring the size and complex refractive index of an aqueous aerosol particle using electromagnetic heating and cavity-enhanced Raman scattering

03-Jul-2018 | Aidan Rafferty; Thomas C. Preston, Physical Chemistry Chemical Physics, 2018

A quantitative understanding of light scattering by small homogeneous particles requires accurate knowledge of particle geometry and complex refractive index, m = n + ik. In weakly absorbing particles, k can be on the order of 10−9, which is well below the detection limit of almost all light ...

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Transpeptidation-Directed Intramolecular Bipartite Tetracysteine Display for Sortase Activity Assay

03-Jul-2018 | Yong Yang; Ai-jun Xu; Chun-yang Zhang, Chemical Communication, 2018

We developed a label-free method to measure Sortase activity by using transpeptidation-directed intramolecular bipartite tetracysteine display. This assay is homogenous with a detection limit of 10.7 ng/mL, and it can be applied to characterize the Sortase A (SrtA)-targeted inhibitor, providing a ...

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Nickel nanowires-based composite material applied to the highly enhanced non-enzymatic electro-oxidation of ethanol

01-Jul-2018 | Author(s): Cecilia S. Tettamanti, María L. Ramírez, Fabiana A. Gutierrez, Paula G. Bercoff, Gustavo A. Riv ..., Microchemical Journal, 2018

Publication date: November 2018 Source:Microchemical Journal, Volume 142 Author(s): Cecilia S. Tettamanti, María L. Ramírez, Fabiana A. Gutierrez, Paula G. Bercoff, Gustavo A. Rivas, Marcela C. Rodríguez In this work, we report the building of a nanostructured platform with ...

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Heterogeneous to homogeneous melting transition visualized with ultrafast electron diffraction

29-Jun-2018 | M. Z. Mo; Z. Chen; R. K. Li; M. Dunning; B. B. L. Witte; J. K. Baldwin; L. B. Fletcher; J. B. Kim; A. Ng; R. Redmer; ..., Science , 2018

The ultrafast laser excitation of matters leads to nonequilibrium states with complex solid-liquid phase-transition dynamics. We used electron diffraction at mega–electron volt energies to visualize the ultrafast melting of gold on the atomic scale length. For energy densities approaching the ...

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Golden ultrafast melting

29-Jun-2018 | Caroline Ash; Brent Grocholski, Science , 2018

Condensed Matter Understanding fast melting of metals is important for applications such as welding and micromachining. However, fast melting leaves simulation as the only option for probing the process. Mo et al. performed ultrafast electron diffraction experiments on laser-pulsed gold films. ...

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Sensors, Vol. 18, Pages 2050: Sensitive Spectroscopy of Acetone Using a Widely Tunable External-Cavity Quantum Cascade Laser

27-Jun-2018 | Nadeem, Faisal ; Mandon, Julien ; Khodabakhsh, Amir ; Cristescu, Simona M.; Harren, Frans J. M., Sensors, 2018

Sensors, Vol. 18, Pages 2050: Sensitive Spectroscopy of Acetone Using a Widely Tunable External-Cavity Quantum Cascade Laser Sensors doi: 10.3390/s18072050 Authors: Faisal Nadeem Julien Mandon Amir Khodabakhsh Simona M. Cristescu Frans J. M. Harren We employed a single-mode, ...

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Sensors, Vol. 18, Pages 2047: Quartz-Enhanced Photoacoustic Spectroscopy Sensor with a Small-Gap Quartz Tuning Fork

27-Jun-2018 | Ma, Yu-Fei ; Tong, Yao ; He, Ying ; Long, Jin-Hu ; Yu, Xin, Sensors, 2018

Sensors, Vol. 18, Pages 2047: Quartz-Enhanced Photoacoustic Spectroscopy Sensor with a Small-Gap Quartz Tuning Fork Sensors doi: 10.3390/s18072047 Authors: Yu-Fei Ma Yao Tong Ying He Jin-Hu Long Xin Yu A highly sensitive quartz-enhanced photoacoustic spectroscopy (QEPAS) ...

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A red-emitting fluorescent probe for detecting Hg2+ in aqueous medium, living cells and organism with a large Stokes shift

26-Jun-2018 | Lei Yang; Yuanan Su; Yani Geng; Haiqing Xiong; Jinliang Han; Qian Fang; Xiangzhi Song, Organic & Biomolecular Chemistry, 2018

A red-emitting fluorescent probe has been developed for the selective and sensitive detection of Hg2+. With the addition of Hg2+, the solution of Probe 1 displayed remarkable fluorescence enhancement (102 folds) with λmaxem = 625 nm and a large Stokes shift (150 nm). The detection limit of this ...

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Sensors, Vol. 18, Pages 2038: On the Determination of Uncertainty and Limit of Detection in Label-Free Biosensors

26-Jun-2018 | Lavín, Álvaro ; Vicente, Jesús de; Holgado, Miguel ; Laguna, María F.; Casquel, Rafael ; Santamaría, Beatriz ; Mai ..., Sensors, 2018

Sensors, Vol. 18, Pages 2038: On the Determination of Uncertainty and Limit of Detection in Label-Free Biosensors Sensors doi: 10.3390/s18072038 Authors: Álvaro Lavín Jesús de Vicente Miguel Holgado María F. Laguna Rafael Casquel Beatriz Santamaría María Victoria Maigler Ana ...

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Sensors, Vol. 18, Pages 2028: Immunogold Nanoparticles for Rapid Plasmonic Detection of C. sakazakii

25-Jun-2018 | Aly, Mohamed A.; Domig, Konrad J.; Kneifel, Wolfgang ; Reimhult, Erik, Sensors, 2018

Sensors, Vol. 18, Pages 2028: Immunogold Nanoparticles for Rapid Plasmonic Detection of C. sakazakii Sensors doi: 10.3390/s18072028 Authors: Mohamed A. Aly Konrad J. Domig Wolfgang Kneifel Erik Reimhult Cronobacter sakazakii is a foodborne pathogen that can cause a rare, ...

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