Analyst Blog

Ghosh & Mastrangelo, Analyst, 2012, Advance Article

Tridib Ghosh and Carlos H. Mastrangelo from the University of Utah, USA, have developed a new dual slope SPR technique that is 10-fold faster than conventional methods. They have based the technique on the measurement of association and dissociation slopes in two half reactions. Results could be measured in 30 sec compared to 5 mins.

This HOT paper will be free to access for 2 weeks. So click through here to read more!

Fast measurement of binding kinetics with dual slope SPR microchips
Tridib Ghosh and Carlos H. Mastrangelo
Analyst, 2012, 137, 2381-2385
DOI: 10.1039/C2AN35045A

Check out some of the HOT articles that have been published with Analyst this month!

Ho & Imae et al., Analyst, 2012, Advance Article

Fu Han Ho, Toyoko Imae and co-workers from the National Taiwan University of Science and Technology have successfully developed a unique sensing technique for monitoring the variation of solution concentrations and measuring the effective dielectric constant in a medium by using an ultra-small and label-free nanosensor.

A solution-based nano-plasmonic sensing technique by using gold nanorods
Fu Han Ho, Yung-Han Wu, Masaki Ujihara and Toyoko Imae
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35101C

Shao et al., Analyst, 2012, Advance Article

Yong Shao and colleagues from Zhejiang Normal University have studied the upconversion emission of Ag nanoclusters templated by single- and double-stranded DNAs in their investigation of sensor design.

Upconversion emission of fluorescent silver nanoclusters and in situ selective DNA biosensing
Qinghua Cui, Yong Shao, Kun Ma, Shujuan Xu, Fei Wu and Guiying Liu
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN00025C

Jin Ouyang from Beijing Normal University and fellow Chinese scientists have made a simple small-molecule fluorescent probe, designed for the detection of human serum proteins via hydrophobic interactions after polyacrylamide gel electrophoresis. The new probe proved to be a good protein reporter due to its fast staining procedure. It also had low detection limits and high resolution.

Ouyang et al., Analyst, 2012, Advance Article

The development of simple and sensitive small-molecule fluorescent probes for the detection of serum proteins after native polyacrylamide gel electrophoresis
Fangfang Wang, Lingyun Huang, Na Na, Dacheng He, Dezhi Sun and Jin Ouyang
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35265F

A team from Canada have tackled the issue of the detection of contamination of jet fuels with aero-turbine lubricating oil in a paper from Hans-Peter Loock, from Queen’s University.

Loock et al., Analyst, 2012, Advance Article

Fluorescence excitation–emission matrix (EEM) spectroscopy and cavity ring-down (CRD) absorption spectroscopy of oil-contaminated jet fuel using fiber-optic probes
Hengameh Omrani, Jack A. Barnes, Alexander E. Dudelzak, Hans-Peter Loock and Helen Waechter
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35091B

This month we have a HOT article from our Analyst Editorial Board member, Graham Cooks. Working with his colleagues from Purdue University, USA, they have developed a rapid, point-of-care method to test whole blood samples that have been supported on filter paper using paper spray mass spectrometry. Addition of a coagulant called alum allowed the sample to be tested right away. The technique was tested on the analysis of therapeutic drugs in blood samples. Click through here to read more. The paper will be free to access for 2 weeks!

Cooks et al., Analyst, 2012, Advance Article

Rapid analysis of whole blood by paper spray mass spectrometry for point-of-care therapeutic drug monitoring
Ryan D. Espy, Nicholas E. Manicke, Zheng Ouyang and R. Graham Cooks
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35082C

Chee & Pumera, Analyst, 2012, 137, 2039-2041

It’s hot hot hot in the latest issue of Analyst, with 14 HOT articles featuring the best in analytical science.  Including: a review on the detection of α-amino-β-methylaminopropionic acid, mid-IR spectroscopy for salivary calculi, fluorescent chemosensing of Ag⁺, and an artificial nose.

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Compton et al., Analyst, 2012, Advance Article

In this HOT review paper, Richard Compton and co-workers from Oxford University discuss the importance of glutathione determination, which has been shown to have physiological importance in diseases such as Parkinson’s, diabetes and cancer. Because of its medical significance, it is important to have quick and easy assays to aid clinical diagnostics and treatment. Click here to read more!

Electrochemical determination of glutathione: a review
John C. Harfield, Christopher Batchelor-McAuley and Richard G. Compton
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35090D

Vaidyanathan et al., Analyst, 2012, Advance Article

In this HOT paper Seetharaman Vaidyanathan and colleagues from the University of Sheffield explore a new method for screening metabolites based on an array format, using relative polarity and selective solvent dissolution. This approach has the potential to be a successful way of rapidly screening metabolomes and it will allow the simultaneous screening and profiling of multiple samples.

A solvation-based screening approach for metabolite arrays
Malinda Salim, Phillip C. Wright and Seetharaman Vaidyanathan
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN16318G

In this HOT paper Patrick Giraudeau, from the Université de Nantes and colleagues, shows the first implementation of an on-line ultrafast HPLC-NMR. Ultrafast COSY spectra were recorded every 12 s in the course of a chromatographic run performed on a mixture of natural aromatic compounds. Click through here to read more!

Real-time separation of natural products by ultrafast 2D NMR coupled to on-line HPLC
Luiz H. K. Queiroz Júnior, Darlene P. K. Queiroz, Liene Dhooghe, Antonio G. Ferreira and Patrick Giraudeau
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN16208C

A height-dependent linear temperature gradient established on the inclined surface of a 3D qiandu (right triangular prism)-shaped PDMS microdevice enables flow-through PCR employing a single heater

South Korean scientists have created a temperature cycle for the on-chip flow-through polymerase chain reaction (PCR) using a single heater.

PCR is used to make copies of a piece of  DNA for genetic research, disease analysis and diagnosis. It consists of four main steps – initialisation; denaturation (melting the DNA template to yield single-stranded DNA); annealing primers to the single-stranded DNA template; and extension, in which the DNA polymerase synthesises a new DNA strand complementary to the DNA template.

On-chip flow-through PCR typically has a short reaction time due to rapid thermal equilibrium allowing quick temperature transitions; however, it normally requires several separate heating blocks to create the different temperatures. Reducing the number of heaters will help make the whole system smaller and more portable. ‘Analysing samples on site could help prevent degradation and contamination,’ explains Nae Yoon Lee from Gachon University, South Korea, who led the research.

Read the full story here in Chemistry World.

Link to journal article:

Flow-through PCR on a 3D qiandu-shaped polydimethylsiloxane (PDMS) microdevice employing a single heater: toward microscale multiplex PCR
Wenming Wu,  Kieu The Loan Trinh and Nae Yoon Lee
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35077G

It’s been a busy year already with so many great papers, so here are some HOT articles from Analyst that you might have missed this month!

Why not take a look, they will be free to read for 2 weeks.

A hydrophobic entrance enhances ion current rectification and induces dewetting in asymmetric nanopores
Matthew Pevarnik, Ken Healy, Matthew Davenport, Joseph Yen and Zuzanna S. Siwya
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN16139G

Analytical investigation of salivary calculi, by mid-infrared spectroscopy
Jean-François Sabot, Marie-Paule Gustin, Katia Delahougue, Frédéric Faure, Christelle Machon and Daniel-Jean Hartmann
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN15924D

Metal-based impurities in graphenes: application for electroanalysis
Sze Yin Chee and Martin Pumera
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN00022A

Integration of gas chromatography mass spectrometry methods for differentiating ricin preparation methods
David S. Wunschel, Angela M. Melville, Christopher J. Ehrhardt, Heather A. Colburn, Kristin D. Victry, Kathryn C. Antolick, Jon H. Wahl and Karen L. Wahl
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN16186A

A novel method for simultaneous analysis of three β2-agonists in foods with the use of a gold-nanoparticle modified glassy carbon electrode and chemometrics
Xiaoyun Lin, Yongnian Ni, Shuzhen Li and Serge Kokot
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN16062E

Flow-through PCR on a 3D qiandu-shaped polydimethylsiloxane (PDMS) microdevice employing a single heater: toward microscale multiplex PCR
Wenming Wu, Kieu The Loan Trinh and Nae Yoon Lee
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35077G

Electrochemiluminescent detection of Mucin 1 protein and MCF-7 cancer cells based on the resonance energy transfer
W. Wei, D. F. Li, X. H. Pan and S. Q. Liu
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35059A

Enhanced fluorescent chemosensor for Ag+ in absolute aqueous solution and living cells: An experimental and theoretical study
Mingming Hu, Jiangli Fan, Jianfang Cao, Kedong Song, Hua Zhang, Shiguo Sun and Xiaojun Peng
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN16272E

Ultrasensitive electrochemiluminescence immunosensor using PtAg@carbon nanocrystals composites as labels and carbon nanotubes-chitosan/gold nanoparticles as enhancer
Meng Zhang, Weijian Dai, Mei Yan, Shenguang Ge, Jinghua Yu, Xianrang Song and Wei Xu
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35186B

A new continuous fluorometric assay for acetylcholinesterase activity and inhibitor screening with emissive core–shell silica particles containing tetraphenylethylene fluorophore
Xiang Shen, Fuxin Liang, Guanxin Zhang and Deqing Zhang
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35154D

Examining changes in cellular communication in neuroendocrine cells after noble metal nanoparticle exposure
Sara A. Love, Zhen Liu and Christy L. Haynes
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN00034B

Noise Adjusted Principal Component reconstruction to optimize infrared microspectroscopy of individual live cells
Ellen J. (Swain) Marcsisin, Christina M. Uttero, Antonella I. Mazur, Miloš Miljković, Benjamin Bird and Max Diem
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN15868J

Graphene oxide integrated sensor for electrochemical monitoring of mitomycin C–DNA interaction
Arzum Erdem, Mihrican Muti, Pagona Papakonstantinou, Ece Canavar, Hakan Karadeniz, Gulsah Congur and Surbhi Sharma
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN16011K

Expression of membrane-associated proteins within single emulsion cell fascimiles
Mayuree Chanasakulniyom, Chiara Martino, David Paterson, Louise Horsfall, Susan Rosser and Jonathan M. Cooper
Analyst, 2012, Advance Article
DOI: 10.1039/C2AN35047E