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https://www.readbyqxmd.com/read/28738651/recent-advances-in-sample-pre-treatment-for-emerging-methods-in-proteomic-analysis
#1
María Ramos-Payán, Juan A Ocaña-González, Rut M Fernández-Torres, Santiago Maspoch, Miguel Ángel Bello-López
The objective of proteomics is the study of proteins (including their structure elucidation, the characterization of their role in biochemical process, the detection and identification of anomalous modifications in their structures and behavior, etc.) from both a qualitative and quantitative point of view. These studies have to face several difficulties as (a) the intrinsic complexity of protein molecules, (b) the low concentrations of the studied proteins, (c) the complexity of the biological samples (which could lead to interferences from the components of these matrixes), etc...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738640/new-insights-in-forensic-chemistry-nir-chemometrics-analysis-of-toners-for-questioned-documents-examination
#2
Stefano Materazzi, Roberta Risoluti, Sara Pinci, Francesco Saverio Romolo
Near-Infrared spectroscopy (NIRs) coupled to chemometrics was investigated for the first time as a new tool for the analysis of black toners to evaluate its application in forensic cases. Ten black toners from four manufacturers were included in this study and the acquired spectra were compared in order to differentiate toners. Multivariate statistical analysis based on Principal Component Analysis (PCA) was considered to develop a model of comparison of toners in questioned documents. Results demonstrated the capabilities of the approach NIR/Chemometrics to correctly identify toners when printed on different papers and to be not affected by the printing process...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738639/a-colorimetric-indicator-displacement-assay-for-cysteine-sensing-based-on-a-molecule-exchange-mechanism
#3
Zhonghua Xue, Xiaoxia Fu, Honghong Rao, Mohammed Hassan Ibrahim, Lulu Xiong, Xiuhui Liu, Xiaoquan Lu
In this study, we developed an ingenious yet effective strategy for cysteine detection. The colorimetric cysteine assay is established through an indicator displacement process, where Cu(2+) and pyrocatechol violet (PV) was employed as receptor and indicator, respectively. Proof-of-concept trials demonstrated that the stronger binding affinity of Cu(2+) receptor toward cysteine than PV indicator endowed our colorimetric sensor with high selectivity and excellent sensitivity as well as with a lower detection limit (4...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738614/in-situ-synthesis-of-reduced-graphene-oxide-gold-nanoparticles-modified-electrode-for-speciation-analysis-of-copper-in-seawater
#4
Ming Liu, Dawei Pan, Wen Pan, Yun Zhu, Xueping Hu, Haitao Han, Chenchen Wang, Dazhong Shen
In this paper, reduced graphene oxide/gold nanoparticle/Nafion (rGO/AuNP/Nafion) modified electrode was fabricated through in-situ synthesis and used for determination of copper ions in strong salt electrolyte (0.5M NaCl) by differential pulse anodic stripping voltammetry (DPASV). This in-situ synthesis procedure was based on the ion-exchange and electrochemical reduction. The use of rGO provided a larger electrode surface and the presence of more active sites, while electron transfer was accelerated by incorporating AuNPs...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738613/a-selective-distance-based-paper-analytical-device-for-copper-ii-determination-using-a-porphyrin-derivative
#5
Rimadani Pratiwi, Michael P Nguyen, Slamet Ibrahim, Naoki Yoshioka, Charles S Henry, Daryono H Tjahjono
Meso-tetrakis(1,2-dimethylpyrazolium-4-yl)porphyrin sulfonate (TDMPzP), a water-soluble porphyrin derivative, was synthesized and used as a colorimetric reagent for Cu(2+) detection on a microfluidic paper-based analytical device (µPAD) using distance-based quantification. TDMPzP showed a high selectivity for Cu(2+) detection in aqueous solutions. When Cu(2+) was added to the TDMPzP under acidic conditions, a color change from green to a pink was observed by the naked eye. Under optimized conditions, the application of this system to a distance-based μPAD exhibited good analytical response...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738584/production-of-stable-and-sensitive-sers-substrate-based-on-commercialized-porous-material-of-silanized-support
#6
Han Zhang, Lin Sun, Yuan Zhang, Yan Kang, Huilian Hu, Huirong Tang, Yiping Du
This paper reports accurate synthesis of a new type of surface-enhanced Raman spectroscopy (SERS) substrate based on gold nanoparticles decorated 201 red silanized diatomaceous supports. The developed SERS substrate is easy to fabricate, cost effective and offers sensitive rapid detection. The performance and stability of the SERS substrate was investigated and the results showed good SERS activity of substrate that can last for more than 6 months. Tiazophos and phosmet pesticides in aqueous solutions can be detected clearly at a low concentration of 0...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738568/novel-imidazole-fluorescent-poly-ionic-liquid-nanoparticles-for-selective-and-sensitive-determination-of-pyrogallol
#7
Zhouyang Li, Yiwen Yang, Yanbo Zeng, Jianbo Wang, Haiqing Liu, Longhua Guo, Lei Li
This paper reports novel imidazole fluorescent poly(ionic liquid) nanoparticles (FPILNs) of poly(1-[(4-methyphenyl)methyl]-3-vinyl-imidazolium bromide (poly([MVI]Br) for selective and sensitive determination of pyrogallol. An imidazole ionic liquid of 1-[(4-methyphenyl)methyl]-3-vinyl-imidazolium bromide ([MVI]Br) was synthesized and used as the only monomer to obtain poly([MVI]Br) possessing phenyl fluorophores using a radical polymerization technique. The obtained poly([MVI]Br) can form nanoparticles in water...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738506/taxonomy-or-trait-based-ecological-assessment-for-tropical-rivers-case-study-on-benthic-diatoms-in-mayotte-island-france-indian-ocean
#8
Kálmán Tapolczai, Agnès Bouchez, Csilla Stenger-Kovács, Judit Padisák, Frédéric Rimet
Diatom-based ecological quality assessment methods have been implemented and used regularly in the Water Framework Directive. These indices use the species' abundance profiles along a specific environmental gradient, which they aim to assess. However, this approach has several problematic issues including the unstable and fast-changing diatom taxonomy. The use of traits can be a solution if their responses to the environmental pressure are well-defined. Here, we developed taxonomy-based and trait-based diatom assemblage indices to assess the ecological status of riverine sites on a tropical island...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738478/-less-common-variants-association-study-and-statistical-analysis
#9
X Liao, J Deng, J Y Xun, J X Yan
In the past decade, based on the "common disease-common variant" hypothesis, genomewide association studies (GWAS) have been extensively used to dissect the genetic components of complex diseases and quantitative traits. However, the identified disease-associated common variants by GWASs can only explain small part of the corresponding disease heritability. "Common disease-rare variant" hypothesis has been proposed to explore the missed heritability. With the development of the next generation sequencing technology, various association studies of less common variants are ongoing...
July 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28738446/single-stage-versus-two-stage-arteriovenous-loop-microsurgical-reconstruction-a-meta-analysis-of-the-literature
#10
REVIEW
Rebecca Knackstedt, Rachel Aliotta, James Gatherwright, Risal Djohan, Brian Gastman, Graham Schwarz, Mark Hendrickson, Raffi Gurunluoglu
BACKGROUND: Arteriovenous (AV) loops can be utilized in a single- or two-stage approach in free flap reconstruction when proper vessels are not available. However, there exists no consensus on which method leads to superior microsurgical and patient outcomes. The purpose of this article was to review single- versus two-stage AV loops utilized in free flap reconstruction with a focus on complications and overall outcomes. METHODS: A systematic review of AV loops for autologous free tissue transfer was conducted...
July 24, 2017: Microsurgery
https://www.readbyqxmd.com/read/28738231/sliding-strip-microfluidic-device-enables-elisa-on-paper
#11
Mohit S Verma, Maria-Nefeli Tsaloglou, Tyler Sisley, Dionysios Christodouleas, Austin Chen, Jonathan Milette, George M Whitesides
This article describes a 3D microfluidic paper-based analytical device that can be used to conduct an enzyme-linked immunosorbent assay (ELISA). The device comprises two parts: a sliding strip (which contains the active sensing area) and a structure surrounding the sliding strip (which holds stored reagents-buffers, antibodies, and enzymatic substrate-and distributes fluid). Running an ELISA involves adding sample (e.g. blood) and water, moving the sliding strip at scheduled times, and analyzing the resulting color in the sensing area visually or using a flatbed scanner...
July 19, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28738186/neonatal-screening-9-of-children-with-filter-paper-thyroid-stimulating-hormone-levels-between-5-and-10%C3%AE-iu-ml-have-congenital-hypothyroidism
#12
Flávia C Christensen-Adad, Carolina T Mendes-Dos-Santos, Maura M F Goto, Letícia E Sewaybricker, Lília F R D'Souza-Li, Gil Guerra-Junior, André M Morcillo, Sofia Helena V Lemos-Marini
OBJECTIVES: To determine the prevalence of congenital hypothyroidism in children with filter paper thyroid-stimulating hormone levels between 5 and 10μUI/mL in the neonatal screening. METHODS: This was a retrospective study including children screened from 2003 to 2010, with filter paper thyroid-stimulating hormone levels between 5 and 10μIU/mL, who were followed-up during the first two years of life when there was no serum thyroid-stimulating hormone normalization...
July 21, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28738085/a-bayesian-spatio-temporal-model-for-forecasting-anaplasma-species-seroprevalence-in-domestic-dogs-within-the-contiguous-united-states
#13
Yan Liu, Stella C Watson, Jenna R Gettings, Robert B Lund, Shila K Nordone, Michael J Yabsley, Christopher S McMahan
This paper forecasts the 2016 canine Anaplasma spp. seroprevalence in the United States from eight climate, geographic and societal factors. The forecast's construction and an assessment of its performance are described. The forecast is based on a spatial-temporal conditional autoregressive model fitted to over 11 million Anaplasma spp. seroprevalence test results for dogs conducted in the 48 contiguous United States during 2011-2015. The forecast uses county-level data on eight predictive factors, including annual temperature, precipitation, relative humidity, county elevation, forestation coverage, surface water coverage, population density and median household income...
2017: PloS One
https://www.readbyqxmd.com/read/28737842/network-meta-analysis-of-disconnected-networks-how-dangerous-are-random-baseline-treatment-effects
#14
Audrey Béliveau, Sarah Goring, Robert W Platt, Paul Gustafson
In network meta-analysis, the use of fixed baseline treatment effects (a priori independent) in a contrast-based approach is regularly preferred to the use of random baseline treatment effects (a priori dependent). That is because, often, there is not aneed to model baseline treatment effects which carries the risk of model misspecification. However, in disconnected networks, fixed baseline treatment effects do not work (unless extra assumptions are made) as there is not enough information in the data to update the prior distribution on the contrasts between disconnected treatments...
July 24, 2017: Research Synthesis Methods
https://www.readbyqxmd.com/read/28737835/pdms-glass-hybrid-device-with-a-reusable-carbon-electrode-for-on-line-monitoring-of-catecholamines-using-microdialysis-sampling-coupled-to-microchip-electrophoresis-with-electrochemical-detection
#15
Rachel A Saylor, Susan M Lunte
On-line separations-based sensors employing microdialysis (MD) coupled to microchip electrophoresis (ME) enable the continuous monitoring of multiple analytes simultaneously. Electrochemical detection (EC) is especially amenable to on-animal systems employing MD-ME due to its ease of miniaturization. However, one of the difficulties in fabricating MD-ME-EC systems is incorporating carbon working electrodes into the device. In this paper, a novel fabrication procedure is described for the production of a PDMS/glass hybrid device that is capable of integrating hydrodynamic microdialysis flow with ME-EC using a flow-gated interface and a pyrolyzed photoresist carbon electrode...
July 24, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28737733/a-secure-and-verifiable-outsourced-access-control-scheme-in-fog-cloud-computing
#16
Kai Fan, Junxiong Wang, Xin Wang, Hui Li, Yintang Yang
With the rapid development of big data and Internet of things (IOT), the number of networking devices and data volume are increasing dramatically. Fog computing, which extends cloud computing to the edge of the network can effectively solve the bottleneck problems of data transmission and data storage. However, security and privacy challenges are also arising in the fog-cloud computing environment. Ciphertext-policy attribute-based encryption (CP-ABE) can be adopted to realize data access control in fog-cloud computing systems...
July 24, 2017: Sensors
https://www.readbyqxmd.com/read/28737728/neighbor-affinity-based-core-attachment-method-to-detect-protein-complexes-in-dynamic-ppi-networks
#17
Xiujuan Lei, Jing Liang
Protein complexes play significant roles in cellular processes. Identifying protein complexes from protein-protein interaction (PPI) networks is an effective strategy to understand biological processes and cellular functions. A number of methods have recently been proposed to detect protein complexes. However, most of methods predict protein complexes from static PPI networks, and usually overlook the inherent dynamics and topological properties of protein complexes. In this paper, we proposed a novel method, called NABCAM (Neighbor Affinity-Based Core-Attachment Method), to identify protein complexes from dynamic PPI networks...
July 24, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28737714/parametric-loop-division-for-3d-localization-in-wireless-sensor-networks
#18
Tanveer Ahmad, Xue Jun Li, Boon-Chong Seet
Localization in Wireless Sensor Networks (WSNs) has been an active topic for more than two decades. A variety of algorithms were proposed to improve the localization accuracy. However, they are either limited to two-dimensional (2D) space, or require specific sensor deployment for proper operations. In this paper, we proposed a three-dimensional (3D) localization scheme for WSNs based on the well-known parametric Loop division (PLD) algorithm. The proposed scheme localizes a sensor node in a region bounded by a network of anchor nodes...
July 24, 2017: Sensors
https://www.readbyqxmd.com/read/28737701/application-of-extrusion-based-hydrogel-bioprinting-for-cartilage-tissue-engineering
#19
REVIEW
Fu You, B Frank Eames, Xiongbiao Chen
Extrusion-based bioprinting (EBB) is a rapidly developing technique that has made substantial progress in the fabrication of constructs for cartilage tissue engineering (CTE) over the past decade. With this technique, cell-laden hydrogels or bio-inks have been extruded onto printing stages, layer-by-layer, to form three-dimensional (3D) constructs with varying sizes, shapes, and resolutions. This paper reviews the cell sources and hydrogels that can be used for bio-ink formulations in CTE application. Additionally, this paper discusses the important properties of bio-inks to be applied in the EBB technique, including biocompatibility, printability, as well as mechanical properties...
July 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28737699/efficient-retrieval-of-massive-ocean-remote-sensing-images-via-a-cloud-based-mean-shift-algorithm
#20
Mengzhao Yang, Wei Song, Haibin Mei
The rapid development of remote sensing (RS) technology has resulted in the proliferation of high-resolution images. There are challenges involved in not only storing large volumes of RS images but also in rapidly retrieving the images for ocean disaster analysis such as for storm surges and typhoon warnings. In this paper, we present an efficient retrieval of massive ocean RS images via a Cloud-based mean-shift algorithm. Distributed construction method via the pyramid model is proposed based on the maximum hierarchical layer algorithm and used to realize efficient storage structure of RS images on the Cloud platform...
July 23, 2017: Sensors
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