Enhancement of Image Contrast, Stability, and SALDI-MS Detection Sensitivity for Latent Fingerprint Analysis by Tuning the Composition of Silver–Gold Nanoalloys

2016 ◽  
Vol 8 (43) ◽  
pp. 29668-29675 ◽  
Author(s):  
Yu-Hong Cheng ◽  
Yue Zhang ◽  
Siu-Leung Chau ◽  
Samuel Kin-Man Lai ◽  
Ho-Wai Tang ◽  
...  
Keyword(s):  
Image Contrast ◽  
Detection Sensitivity ◽  
Fingerprint Analysis ◽  
Latent Fingerprint ◽  
Ms Detection ◽  
Saldi Ms

Using a Polycapillary Optic as a Spatial Filter to Improve Micro Xray Analysis in Low-Vacuum and Environmental SEM Systems

2001 ◽  
Vol 7 (S2) ◽  
pp. 700-701
Author(s):  
Ning Gao ◽  
David Rohdeb
Keyword(s):  
Energy Dispersive Spectrometer ◽  
Spatial Filter ◽  
Image Contrast ◽  
Detection Sensitivity ◽  
X Rays ◽  
High Background ◽  
X Ray ◽  
Curved Channels ◽  
Probe Form ◽  
Environmental Sem

An inevitable consequence of the presence of the gas in the sample chamber of a low-vacuum scanning electron microscope (LV-SEM) and environmental SEM (ESEM) is the electron beam broadening due to the scattering in the gas. The electron broadening has a large impact on x-ray analysis because the fluorescent characteristic x rays generated far from the center of the electron probe form a high background, which reduces the detection sensitivity of x-ray analysis and degrades the x-ray image contrast. We report in this paper of using a polycapillary focusing x-ray optic between the sample and the energy-dispersive spectrometer as a spatial filter to filter out unwanted x-rays generated far from the specimen. As a result, the x-ray image contrast and the detection sensitivity of the system were notably improved.A polycapillary focusing optic collects a large solid angle of x rays from an x-ray source of small area at its input focus, guide them through the curved channels by multiple external total reflections, and focus them to the output focus.

A tetraphenylethene-based dye for latent fingerprint analysis

2017 ◽  
Vol 244 ◽  
pp. 777-784 ◽  
Author(s):  
Xiaodong Jin ◽  
Ran Xin ◽  
Shifan Wang ◽  
Wenzhu Yin ◽  
Tongxiang Xu ◽  
...  
Keyword(s):  
Fingerprint Analysis ◽  
Latent Fingerprint

scholarly journals SRM-MS Method Development for Hepcidin-25 Peptide

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Kyung-Cho Cho ◽  
Byoung-Kyu Cho ◽  
Jin Woo Jung ◽  
Ye Ji Lee ◽  
Eun Bong Lee ◽  
...  
Keyword(s):  
Disulfide Bonds ◽  
Quantitative Measurement ◽  
Method Development ◽  
Limit Of Detection ◽  
Diagnostic Value ◽  
Ionization Efficiency ◽  
Detection Sensitivity ◽  
Reduced Form ◽  
Triple Quadrupole ◽  
Ms Detection

As advanced mass spectrometry- (MS-) based hepcidin analysis offers to overcome the limitations in analytical methods using antihepcidin, further improvement of MS detection sensitivity for the peptide may enhance the diagnostic value of the hepcidin for various iron-related disorders. Here, improved MS detection sensitivity of hepcidin has been achieved by reducing the disulfide bonds in hepcidin, by which proton accessibility increased, compared to the intact hepcidin peptide. Comparing the ionization efficiencies of reduced and nonreduced forms of hepcidin, the reduced form of hepcidin showed an increase in ionization efficiency more than two times compared to the nonreduced form of hepcidin. We also demonstrated improved detection sensitivity of the peptide in SRM assay. We observed a significant improvement of detection sensitivity at the triple-quadrupole MS platform, that the ionization efficiency increased at least twice more, and that the limit of detection (LOD) increased more than 10 times in the concentration ranges of 1 fmol to 10 fmol of hepcidin. In this study, we demonstrated the usefulness of the hepcidin modification for overall enhancement of the ionization efficiencies of the hepcidin peptide in the MS-based quantitative measurement assay.

An aggregation-induced emission luminogen combined with a cyanoacrylate fuming method for latent fingerprint analysis

The Analyst ◽  
2020 ◽  
Vol 145 (6) ◽  
pp. 2311-2318 ◽  
Author(s):  
Xiaodong Jin ◽  
Hao Wang ◽  
Ran Xin ◽  
Yining Ma ◽  
Guoping Wu ◽  
...  
Keyword(s):  
Fingerprint Analysis ◽  
Latent Fingerprints ◽  
Latent Fingerprint ◽  
Aggregation Induced Emission ◽  
Cyanoacrylate Fuming

An aggregation-induced emission luminogen tetraphenylethene-based dye FLA-2, was synthesized and characterized. Two methods were adopted herein to visualize the latent fingerprints, respectively.

Porous TiO2 Film Immobilized with Gold Nanoparticles for Dual-Polarity SALDI MS Detection and Imaging

2020 ◽  
Vol 12 (38) ◽  
pp. 42567-42575
Author(s):  
Xian-Na Wang ◽  
Weiwei Tang ◽  
Andrew Gordon ◽  
Hui-Ying Wang ◽  
Linru Xu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Tio2 Film ◽  
Porous Tio2 ◽  
Ms Detection ◽  
Dual Polarity ◽  
Saldi Ms

Enhancing reproducibility of SALDI MS detection by concentrating analytes within laser spot

Talanta ◽  
2018 ◽  
Vol 179 ◽  
pp. 583-587 ◽  
Author(s):  
Fei Teng ◽  
Qunyan Zhu ◽  
Yalei Wang ◽  
Juan Du ◽  
Nan Lu
Keyword(s):  
Laser Spot ◽  
Ms Detection ◽  
Saldi Ms
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