Analytical Chemist

Just Published: Trends in Analytical Chemistry

2013-05-10T10:54:00.001+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Trends in Analytical Chemistry
http://rss.sciencedirect.com/publication/science/5787

Selected papers from the latest issue:

Analysis of biopharmaceutical proteins in biological matrices by LC-MS/MS I. Sample preparation Review Article

Available online 13 April 2013
Rainer Bischoff, Kees J. Bronsema, Nico C. van de Merbel

Analytical Strategies for Real-Time and Non-Invasive Tracking of Carbon Nanomaterials in vivo Review Article

Available online 13 April 2013
Aijuan Liu, Shumei Zhai, Bin Zhang, Bing Yan

Analytical and bioanalytical problems associated with the toxicity of elemental sulfur in the environment Review Article

Available online 13 April 2013
Karolina Kuklińska, Lidia Wolska, Jacek Namieśnik, Monika Cieszyńska, Lidia Wolska

Functionalization and dispersion of carbon nanotubes in ionic liquids Review Article

Available online 12 April 2013
M.L. Polo-Luque, B.M. Simonet, M. Valcárcel

Stationary phases for separation of nucleosides and nucleotides by hydrophilic interaction liquid chromatography Review Article

Available online 12 April 2013
D. García-Gómez, E. Rodríguez-Gonzalo, R. Carabias-Martínez

Pittcon logs another success

Available online 12 April 2013
I. Mitch Taylor, Stephen R. Groskreutz, Andrea Jaquins Gerstl, Jing Zhang, Stephen G. Weber

In the news

Available online 10 April 2013

New materials in solid-phase microextraction Review Article

Available online 9 April 2013
Jianqiao Xu, Juan Zheng, Jingyu Tian, Fang Zhu, Feng Zeng, Chengyong Su, Gangfeng Ouyang

KF Coulometric Titrator Ideal for Trace Water Level Content

2013-05-10T10:51:00.002+01:00

JM Science announces their new AQUACOUNTER® Karl Fischer Coulometric Titrator (AQ-2200S). This high-end titrator is ideal for the trace level water content determination with its excellent capability and upgraded performance.

It will be of interest for users who: 1) have many kinds of samples to be analyzed; 2) exchange KF reagents frequently or after each measurement; 3) are eco-minded and budget-conscious.

The titrator allows two titration stations to run parallel with various coulometric/volumetric combinations. With both a volumetric and coulometric channel, one can measure moisture over the entire range from 1 ppm to 100% or double your sample throughput with 2 identical KF stations. This design is economical and ecological because it reduces the use of expensive KF reagents. Three types of electrolytic cells are available including small volume, standard, and one-room cell. There is an ultra-trace moisture measurement mode equipped in this titrator with an accuracy of ≤10µgH20. The cell design allows for easy assembly and maintenance. The 7.5-inch color touch screen is easy to read and operate. It has enhanced memory capacity and user may store results on a USB flash memory stick. The stored data can be read out on the color display. Result data with curves may be viewed on a PC internet browsing program with optional software. This titrator comes equipped with a built-in thermal printer with easy paper loading and high-resolution printouts. It can be used with peripherals of previous versions.

NEW Economical Tubing Pumps

2013-05-10T10:48:00.002+01:00

Aalborg® Instruments announced the expansion of its economical TP Peristaltic Pump line. TPV models are designed for liquids of low to high viscosity and can also accommodate fuels with the appropriate tubing.

TPV Pump Systems ensure stable performance and accurate, repeatable liquid transfer applications. They are ideal for laboratory, processing, and OEM applications.

TPV Pump Features: All Models

Long tubing life
3 - 316 stainless steel rollers and shafts
Can be mounted in any direction
Controls for prime, brake, rpm, reverse flow direction, power LED
Adjustable handle to carry, hang, or stand pump
Safety cover
Maintenance-free 24 VDC brushless motor
Speed adjustable from 0 to 300 rpm
Unique adjustable tubing holder assembly
Fixed occlusion wall

TPV Pump Systems and Additional Model Features:

Pump Heads: Simply attach the pump head to your motor via existing mounting holes or to one purchased from Aalborg®.

TPVAD: AD Model Adjustable RPM Pumps: Standard features.

TPVDP: DP Model Adjustable RPM Pumps with Dispensing: Remote Start/Stop option is available. Set timer relay to dispense or to stop dispensing liquids over a selected time period to either Shot Mode or to Continuous Pulse Mode.

TPVRP: RP Model Adjustable RPM Pumps with Dispensing: Set timer relay to dispense liquids for a selected time period and to stop dispensing for another selected time period.

Flow Rate Ranges: 8 ml/min to 377 ml/min dependent on motor speed and tubing size.

Just Published:Biosensors & Bioelectronics

2013-05-09T10:45:00.002+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Biosensors & Bioelectronics
http://rss.sciencedirect.com/publication/science/5223

Selected papers from the latest issue:

Fluorescent Molecularly Imprinted Polymer Thin Films for Specific Protein Detection Prepared with Dansyl Ethylenediamine-Conjugated O-Acryloyl L-Hydroxyproline Original Research Article

Available online 6 April 2013
Yuki Inoue, Atsushi Kuwahara, Kohei Ohmori, Hirobumi Sunayama, Tooru Ooya, Toshifumi Takeuchi

MultisHRP-DNA-coated CMWNTs as signal labels for an ultrasensitive hepatitis C virus core antigen electrochemical immunosensor Original Research Article

Available online 6 April 2013
Cuixia Ma, Mo Liang, Li Wang, Hua Xiang, Yingtao Jiang, Yiyan Li, Guoming Xie

Naked-eye Detection of Nucleic Acids through Rolling Circle Amplification and Magnetic Particle Mediated Aggregation Original Research Article

Available online 6 April 2013
Caiqin Lin, Yunxia Zhang, Xin Zhou, Bo Yao, Qun Fang

Graphical abstract

A compact hybrid-multiplexed potentiostat for real-time electrochemical biosensing applications Original Research Article

Available online 6 April 2013
Ioannis Ramfos, Nikolaos Vassiliadis, Spyridon Blionas, Konstantinos Efstathiou, Alex Fragoso, Ciara K. O'Sullivan, Alexios Birbas

Ultrafast Molecular Motor Driven Nanoseparation and Biosensing Original Research Article

Available online 6 April 2013
Mercy Lard, Lasse ten Siethoff, Saroj Kumar, Malin Persson, Geertruy te Kronnie, Heiner Linke, Alf Månsson

Electrochemical cholesterol sensor based on carbon nanotube @molecularly imprinted polymer modified ceramic carbon electrode Original Research Article

Available online 6 April 2013
Yuejin Tong, Haidong Li, Huaimin Guan, Jianming Zhao, Saadat Majeed, Saima Anjum, Feng Liang, Guobao Xu

Miniaturized flow system based on enzyme modified PMMA microreactor for amperome5tric determination of glucose Original Research Article

Available online 6 April 2013
Luís Marcos Cerdeira Ferreira, Eric Tavares da Costa, Claudimir Lucio do Lago, Lúcio Angnes

Label-free and sensitive strategy for microRNAs detection based on the formation of boronate ester bonds and the dual-amplification of gold nanoparticles Original Research Article

Available online 6 April 2013
Ning Xia, Liping Zhang, Guifang Wang, Qingqin Feng, Lin Liu

Supersandwich-type electrochemiluminescenct aptasensor based on Ru (phen)32+ functionalized hollow gold nanoparticles as signal-amplifying tags Review Article

Available online 6 April 2013
Guofeng Gui, Ying Zhuo, Ya-Qin Chai, Ni Liao, Min Zhao, Jing Han, Qiang Zhu, Ruo Yuan, Yun Xiang

10.

Time-resolved chemiluminescence strategy for multiplexed immunoassay of clenbuterol and ractopamine

Available online 6 April 2013
Jing Han, Hongfei Gao, Wenwen Wang, Zhenxing Wang, Zhifeng Fu

11.

Potentiometric sensing of nuclease activities and oxidative damage of single-stranded DNA using a polycation-sensitive membrane electrode Original Research Article

Available online 6 April 2013
Jiawang Ding, Wei Qin

12.

Development of a high-sensitivity immunoassay for amyloid-beta 1–42 using a silicon microarray platform Original Research Article

Available online 6 April 2013
Paola Gagni, Laura Sola, Marina Cretich, Marcella Chiari

13.

Bead Assembly Magnetorotation as a Signal Transduction Method for Protein Detection Original Research Article

Available online 6 April 2013
Ariel Hecht, Patrick Commiskey, Nicholas Shah, Raoul Kopelman

14.

Ultrasensitive and Selective Gold Film-based Detection of Mercury (II) in Tap Water Using a Laser Scanning Confocal Imaging-surface Plasmon Resonance System in Real Time Original Research Article

Available online 5 April 2013
Hongyan Zhang, Liquan Yang, Bingjiang Zhou, Weimin Liu, Jiechao Ge, Jiasheng Wu, Ying Wang, Pengfei Wang

15.

Nickel Nanoparticle-Chitosan-Reduced Graphene Oxide-Modified Screen-Printed Electrode for Enzyme-Free Glucose Sensing in Portable Microfluidic Devices Original Research Article

Available online 3 April 2013
Jiang Yang, Ji-Hyuk Yu, J. Rudi Strickler, Woo-Jin Chang, Sundaram Gunasekaran

16.

Stainless steel modified with an aminosilane layer and gold nanoparticles as a novel disposable substrate for impedimetric immunosensors Original Research Article

Available online 3 April 2013
Behzad Rezaei, Elaheh Havakeshian, Ali A. Ensafi

17.

Improving Biocompatibility by Surface Modification Techniques onImplantable Bioelectronics Review Article

Available online 3 April 2013
Peter Lin, Chii-Wann Lin, Raafat Mansour, Frank Gu

18.

LSI-based amperometric sensor for real-time monitoring of embryoid bodies Original Research Article

Available online 3 April 2013
Mustafa Şen, Kosuke Ino, Kumi Y. Inoue, Toshiharu Arai, Taku Nishijo, Atsushi Suda, Ryota Kunikata, Hitoshi Shiku, Tomokazu Matsue

19.

A generic microfluidic biosensor of G protein-coupled receptor activation - Monitoring cytoplasmic [Ca2+] changes in human HEK293 cells Original Research Article

Available online 3 April 2013
Margriet Roelse, Norbert C.A. de Ruijter, Elwin X. Vrouwe, Maarten A. Jongsma

20.

Simultaneous capture and in situ analysis of circulating tumor cells using multiple hybrid nanoparticles Original Research Article

Available online 3 April 2013
Hun Joo Lee, Hyeon-Yeol Cho, Jin Ho Oh, Kak Namkoong, Jeong Gun Lee, Jong-Myeon Park, Soo Suk Lee, Nam Huh, Jeong-Woo Choi

Graphical abstract

21.

Electrochemical sensor based on molecularly imprinted polymer film via sol-gel technology and multi-walled carbon nanotubes-chitosan functional layer for sensitive determination of quinoxaline-2-carboxylic acid Original Research Article

Available online 2 April 2013
Yukun Yang, Guozhen Fang, Guiyang Liu, Mingfei Pan, Xiaomin Wang, Lingjie Kong, Xinlei He, Shuo Wang

22.

3-Aminophenyl boronic acid-functionalized CuInS2 quantum dots as a near-infrared fluorescence probe for the determination of dopamine Original Research Article

Available online 2 April 2013
Siyu Liu, Fanping Shi, Xiaojun Zhao, Lu Chen, Xingguang Su

23.

An amperometric glutamate biosensor based on immobilization of glutamate oxidase onto carboxylated multiwalled carbon nanotubes/gold nanoparticles/chitosan composite film modified Au electrode Original Research Article

Available online 2 April 2013
Bhawna Batra, C.S. Pundir

24.

A simple and sensitive fluorescence biosensor for detection of organophosphorus pesticides using H2O2-sensitive quantum dots/bi-enzyme Original Research Article

Available online 2 April 2013
Xianwei Meng, Jianfei Wei, Xiangling Ren, Jun Ren, Fangqiong Tang

25.

A sensitive electrochemical aptasensor for thrombin detection based on exonuclease-catalyzed target recycling and enzyme-catalysis Original Research Article

Available online 2 April 2013
Huayu Yi, Wenju Xu, Yali Yuan, Yongmei Wu, Yaqin Chai, Ruo Yuan

26.

Longitudinal surface plasmon resonance assay enhanced by magnetosomes for simultaneous detection of Pefloxacin and Microcystin-LR in seafoods Original Research Article

Available online 1 April 2013
Xiulan Sun, Longyun Wu, Jian Ji, Donglei Jiang, Yinzhi Zhang, Zaijun Li, Genyi Zhang, Hongxia Zhang

27.

Sensitive chemiluminescence detection of wild-type p53 protein captured by surface-confined consensus DNA duplexes

Available online 1 April 2013
Xiaolan Chen, Chuhua He, Zhifan Zhang, Jianxiu Wang

28.

Highly sensitive recognition of Pb2+ using Pb2+ triggered exonuclease aided DNA recycling

Available online 31 March 2013
Hui Xu, Pingping Xu, Shanmin Gao, Shengxiao Zhang, Xingchun Zhao, Chunhai Fan, Xiaolei Zuo

Analyzing Soil Samples for Percentage Carbon, Hydrogen & Nitrogen

2013-05-09T10:43:00.000+01:00

Application note 51* from Exeter Analytical Inc. illustrates how the Carbon, Hydrogen and Nitrogen (CHN) content of soil samples can be precisely and reproducibly determined using their Model 440 Elemental Analyzer.
The determination of the Carbon, Hydrogen and Nitrogen (CHN) content of soil samples is of major interest to environmental and agrochemical laboratories throughout the world. Organic matter is known to directly influence the productive capacity of different soils as it is a major contributor of C, H as well as N, P, S and other nutrients. Percentage Carbon can be determined in both its inorganic and organic forms via acid pre-treatment or temperature differential measurement using an Exeter Analytical Model 440 Elemental Analyzer. The determination of the Nitrogen content of soils using a Model 440 Elemental Analyser saves considerable time and cost with no diminishment of data quality compared with the traditional Kjeldahl nitrogen determination method.

This application note includes details of the analytical methodology used plus data demonstrating the high quality of CHN data determination that is possible using a Model 440 Elemental Analyzer.

The Exeter Analytical Model 440 is a static combustion CHN Elemental Analyzer, with a unique horizontal furnace design, which enables easy removal of sample residue between each soil analysis. Consequently one combustion tube will analyze in excess of 1000 soil samples without the need for removal and cleaning. By comparison other elemental analyzers, employing vertical furnace designs, will require cleaning after as little as 20 samples. The gas flow characteristics of the Model 440 analyzer are superior to other elemental analyzers due to the effective elimination of troublesome residue build-up. This thereby provides longer-term calibration stability as well as enhanced accuracy and precision for measured soil sample data.

In addition, as the Model 440 provides complete control over combustion parameters it is able to reproducibly achieve 100% combustion with the widest range of soil samples. Proprietary Nitrogen analysis software uniquely enables accurate measurement of low Nitrogen levels (in the 0.1-0.2% range) with a high degree of accuracy.

For a copy of this new application note please contact Exeter Analytical on +1-978-251-1411 / +44-2476-323223 (in Europe) or email sales@eai1.com.

Gordon F. Kirkbright Bursary Award, 2014

2013-05-09T10:40:00.000+01:00

The Gordon F. Kirkbright bursary award is a prestigious annual award that enables a promising student/non-tenured young scientist of any nation to attend a recognised scientific meeting or visit a place of learning.

The fund for this bursary was established in 1985 as a memorial to Professor Gordon Kirkbright in recognition of his contributions to analytical spectroscopy and to science in general. Although the fund is administered by the Association of British Spectroscopists (ABS) Trust, the award is not restricted to spectroscopists.

Applications are invited for the 2014 Gordon Kirkbright Bursary.

For further information contact John Chalmers at, email: vibspecconsult@aol.com

The closing date for entries is 31 December 2013.

Just Published: Journal of Pharmaceutical and Biomedical Analysis

2013-05-08T09:16:00.001+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Journal of Pharmaceutical and Biomedical Analysis
http://rss.sciencedirect.com/publication/science/5266

Selected papers from the latest issue:

Reproducibility of the anti-factor Xa and anti-factor IIa assays applied to enoxaparin solution Original Research Article

Available online 6 April 2013
Céline Martinez, Adama Savadogo, Christophe Agut, Pascal Anger

Graphical abstract

Determination of dextromethorphan and levomethorphan in seized heroin samples by enantioselective HPLC and electronic CD

Available online 6 April 2013
Daniele Tedesco, Anna Maria Di Pietra, Francesca Rossi, Marco Garagnani, Elia Del Borrello, Carlo Bertucci, Vincenza Andrisano

Graphical abstract

Evaluation of the residual solvent content of counterfeit tablets and capsules Original Research Article

Available online 6 April 2013
E. Deconinck, M. Canfyn, P.-Y. Sacré, P. Courselle, J.O. De Beer

Graphical abstract

A comparative study on the pharmacokinetics of a traditional Chinese herbal preparation with the single herb extracts in rats by LC–MS/MS method Original Research Article

Available online 6 April 2013
Ying-guang Sun, Ying-feng Du, Kai Yang, Lu Chang, Liang Cao, Yan-ping Ren, Qian Sun, Qiao Wang, Lan-tong Zhang, Pin-tian lv

Graphical abstract

Application of Two-phase hollow fiber liquid phase microextraction coupled with high–performance liquid chromatography for the study of the echinacoside pharmacokinetics in Parkinson's disease rat plasma Original Research Article

Available online 3 April 2013
Jun Zhou, Ping Zeng, Jiang Bing Sun, Feng Qiao Wang, Qiong Zhang

Graphical abstract

Typical chromatograms of determination of Echinacoside (50ng mL−1) and IS in plasma samples; (A) plasma sample 1h after oral administration with Liquid-liquid extraction; (B) plasma sample 1h after oral administration with Two-phase hollow fiber liquid phase microextraction.

Physico-chemical Solid-State Characterization of Pharmaceutical Pyrazolones: An Unexpected Thermal Behaviour

Available online 3 April 2013
Adriana Fuliaş, Ionuţ Ledeţi, Gabriela Vlase, Titus Vlase

Graphical abstract

Systematic identification and quantification of tetracyclic monoterpenoid oxindole alkaloids in Uncaria rhynchophylla and their fragmentations in Q-TOF-MS spectra Original Research Article

Available online 2 April 2013
Shuanglu Xie, Yuanyuan Shi, Chunyong Wu, Yixiang Wang, Wenyuan Liu, Feng Feng, Ning Xie

Graphical abstract

Isolation and characterization of bioactive compounds from plant resources: the role of analysis in the ethnopharmacological approach Review Article

Available online 2 April 2013
G. Brusotti, I. Cesari, A. Dentamaro, G. Caccialanza, G. Massolini

Short Guide to 3D Cell Culture

2013-05-08T09:14:00.001+01:00

A new informative booklet entitled ‘Short Guide to 3D Cell Culture’ has been produced by AMSBIO. Drawing upon a wealth of experience of working with a wide range of 3D cell culture procedures and formats the guide is aimed at assisting research scientists looking to culture cells in more physiologically relevant environments.

Traditional monolayer cell culture on plastic dishes or in flasks, rarely recreates the conditions cells experience in vivo. Over the past 20 years, many researchers have actively sought ways to culture cells in 3D. The conclusion reached by many researchers is that there is no silver bullet, each cell type needs a different environment and many biological questions may need specific methods to study them.

The AMSBIO guide provides background information on what is 3D cell culture and why researchers are increasingly switching to it. Many types of 3D cell culture matrices for spheroid, organotypic and directional cultures are described in addition to natural hydrogels, scaffold-free cell culturing, artificial scaffolds and synthetic biomimetics. An up-to-date summary details how 3D cell culture techniques are helping to advance cellular research in applications including viability and cytotoxicity, invasion and motility, cell signaling and communication as well as tissue regeneration and stem cell growth and differentiation. An easy-to-use table is included to guide researchers towards the optimal 3D cell culture matrix for different applications.

Versatile High Performance Benchtop Freeze Dryer

2013-05-08T09:12:00.001+01:00

The new VirTis BenchTop Pro freeze dryer range from SP Scientific have been designed to be highly affordable, yet meet the needs of the most demanding research laboratories. Each system can be configured to meet your present and future needs.

Condenser refrigeration packages of -55°C, -75°C, -85°C and -105°C allow you to meet the demands of both aqueous or aqueous solvent based formulations. You can configure your system for smaller sample numbers or to process a relatively heavy workload with condenser size choices of 3 liter, 8 liter or 9 liter. This built-in flexibility allows you to maximize the use of the freeze dryer in your lab while not paying needlessly for unnecessary capacity or refrigeration.

Manifolds are available in a variety of easily interchangeable styles. In applications where inorganic solvents are being utilized or you are rack drying and want to ensure visibility an acrylic manifold is the option of choice. For labs tasked with organic solvent applications the stainless steel manifolds will provide a lifetime of use.

Traditional time losses incurred from lengthy condenser defrost and clean-up procedures are minimized with the new hot-gas defrost facility on the BenchTop Pro.

Designed for both the occasional user and freeze drying expert the Benchtop Pro Omnitronics Controller simplifies freeze drying and makes the system easy to operate. One touch start-up and shut down ensure that your product and freeze dryer are protected from inadvertent operational procedures. An intuitive graphic display provides users with at-a-glance understanding of the status of the freeze dryer and whether or not appropriate freeze drying conditions exist. Audible alarms help notify the user of potential problems with the system and hence, with the product. All Omnitronics controllers come complete with a trending screen that allows you to watch critical parameters on an on-going basis if required. Utilizing optional Ethernet control, you can connect the freeze dryer to your network and monitor and control your freeze dryer from any other location on the network. The Ethernet option also allows printout in a batch record, alpha-numeric, type report.

Just Published: Vibrational Spectroscopy

2013-05-07T08:33:00.000+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Vibrational Spectroscopy

http://rss.sciencedirect.com/publication/science/5293

Selected papers from the latest issue:

Vibrational spectroscopy and DFT calculations 1, 3-dibromo-2,4,6-trimethylbenzene. (Anharmonicity, coupling and methyl group tunneling) Original Research Article

Available online 11 April 2013
S. Zeroual, J. Meinnel, A. Lapinski, S.Parker, A. Boudjada, A. Boucekkine

Raman spectroscopy and structural properties of InxBi40-xSe60 system Original Research Article

Available online 8 April 2013
S.A. Saleh, E.M.M. Ibrahim, M.M. Wakkad

New SMART 3.0 Video Tracking System

2013-05-07T08:32:00.001+01:00

Coulbourn Instruments is pleased to announce the launch of the SMART 3.0 Advanced Video Tracking System for researchers.

SMART 3.0 offers the most user-friendly interface combined with the power and flexibility required to increase the productivity of your research. The new modular structure fits all activity research needs.

Applications include standard tracking and spontaneous activity (distance, speed, time, entries in zones, mobility, low/high activity etc.)
Advanced calculations for water maze, open field, plus-maze, forced swimming, T-maze, Y-maze, place preference, social interaction, etc.
Global activity detection optimized for forced swim and fear conditioning applications
Superior zone editing and association features, including adjustable brightness and contrast in each zone.
Most comprehensive video tracking analysis tools available including 2D and 3D activity mapping.
Built-in DVR system for simple applications and RECORD-IT DVR options for more complex needs.

Coulbourn Instruments is the exclusive US distributor of SMART 3.0 and other Panlab products. Coulbourn and Panlab, both Harvard Apparatus companies, provide the most trusted solutions for behavioral studies. These complementary solutions have been assembled into a comprehensive new catalog.

Coulbourn Instruments is a global developer, manufacturer, and distributor of innovative and specialized products to enhance bioresearch.

Kett Introduces a New Single Grain Moisture Tester, the PQ520

2013-05-07T08:30:00.001+01:00

Kett, the world’s leading manufacturer of award-winning portable handheld moisture analyzers and coating thickness analysis instrumentation, announced today the introduction of the PQ520, a new analyzer that provides rapid moisture measurement of rice, barley and wheat. The PQ520 is the latest in instrument innovation from Kett, a leader in rice, grain and seed measurement for more than 65 years. The PQ520 is designed for use in laboratory, near-line process and remote QA/QC applications where quick, accurate determination of moisture content is required.

Kett is exhibiting the PQ520 at the 2013 Pittsburgh Conference and Exhibition (Pittcon) through March 21 in Philadelphia, Pennsylvania, in booth 1503.

This simple-to-use device allows users to measure the moisture content of individual seeds within a sample. Tests are completed without sample preparation. The PQ520 is factory-calibrated for wheat, brown, polished and paddy rice, as well as naked and standard barley. To measure a sample, the user selects the calibration, pours a sample into the large hopper and presses the “Measure” button. Each kernel is individually tested and the value displayed on the large LCD screen. When complete, the number of kernels tested, the average moisture, and a histogram detailing the distribution of moisture values is displayed.

The PQ520 is capable of measuring from 10 to 1,000 kernels in each batch and can measure 150 kernels per minute.

Kett’s PQ520 builds on the success of its PQ500 and PQ510 Single Grain Moisture Tester. These instruments are generally considered the worldwide standard for the measurement for single grain seed moisture; the PQ510 has been discontinued with the introduction of the PQ520.

Kett continues to stand behind the PQ520 with a one-year “Total Care” manufacturer's warranty on parts and labor and specification compliance

For a complete brochure on this exciting new addition to the Kett product line, visit: www.kett.com/files/brpittpq520.pdf.

Just Published: Chemometrics and Intelligent Laboratory Systems

2013-04-30T15:57:00.002+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Chemometrics and Intelligent Laboratory Systems
http://rss.sciencedirect.com/publication/science/5232

Selected papers from the latest issue:

Quantification of paracetamol through tablet blister packages by Raman spectroscopy and multivariate curve resolution-alternating least squares Original Research Article

Available online 6 April 2013
Lotte B. Lyndgaard, Frans van den Berg, Anna de Juan

Subspace partial least squares model for multivariate spectroscopic calibration Original Research Article

Available online 6 April 2013
Zhiqiang Ge, Zhihuan Song

Fault diagnosis in chemical processes and equipment with feedbacks Original Research Article

Available online 6 April 2013
L.A. Rusinov, N.V. Vorobiev, V.V. Kurkina

Metabonomics in Traditional Chinese Medicine: Mass Spectrum-based Orthogonal Projection Method to Eliminate the Signals of Exogenous Metabolites Original Research Article

Available online 2 April 2013
Tian Lv, Hong-Yuan Mou, Jiang-Jiang Feng, Lian Xie, Xu-Ting Zhu, Ling Liu, Hong-Ping Xie, Yi-Wen Xing

AirClean Systems launches new Patriot ductless fume hoods.

2013-04-30T15:56:00.000+01:00

AirClean Systems, the North American leader in ductless containment since 1992, announces the introduction of its newest product line: Patriot Ductless Fume Hoods. Patriot ductless hoods incorporate much of the advanced technology of AirClean’s Independence fume hood with the cost effective backbone of AirClean’s AC4000 folding and sliding-sash ductless fume hoods.

Patriot ductless fume hoods feature the easy-to-use AirSafe™ NXT automatic safety controller for added operator safety. This color touchscreen controller automatically increases or decreases blower speed to maintain the user’s pre-set face velocity, ensuring airflow is within standard operating parameters. The current face velocity is displayed at all times. AirSafe NXT also monitors the bonded carbon filtration bed, alerting the user audibly and visually should filter saturation occur. Patriot features a unique ‘application confirmation’ sequence that is required with every use of the hood. AirSafe NXT displays the approved chemical class for the hood, and waits for a confirmation from the user before allowing the hood to be used.

In addition to safety features, AirSafe NXT also provides a multi-language and multi-unit capability not found in most ductless hoods. With the press of a button, users can switch the controller language between English, Spanish, French and German. Airflow can be displayed in both linear feet per minute (LFM) and meters per second (m/s).

Patriot ductless hoods eliminate the need for costly installation, ductwork and over-built HVAC systems associated with traditional fume hood use within the laboratory. An on-board energy meter, accessed via AirSafe TOUCH, displays the real-time and life-time energy use of the hood.

AirClean Systems’ unique bonded carbon filtration is standard on all Patriot ductless fume hoods. For added application breadth and capacity, Silconazyne™ filtration is also available for Patriot.

Patriot’s rolled-entry design combined with AirZone™ baffling provides laminar flow within the cabinet, preventing eddy currents and keeping fumes or particulate from escaping the hood. Seamless, thermally welded polypropylene construction means the Patriot will never rust, providing years of service life. All electronics and blowers are post-filter, so they are never exposed to chemicals used in the hood.

All AirClean Systems ductless fume hoods are made in the USA and ship fully assembled, requiring very minimal installation. Simply place on a cabinet, stand or bench top and plug into a standard 110V or 220V outlet. The Patriot ductless fume hood can be installed and used within minutes of being removed from its shipping container.

Patriot ductless fume hoods are now available. Folding sash and sliding sash models are initially available in 48” and 72” widths.

Just Published: Trends in Analytical Chemistry

2013-04-29T08:09:00.001+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Trends in Analytical Chemistry
http://rss.sciencedirect.com/publication/science/5787

Selected papers from the latest issue:

Human hair as a biomarker of human exposure to persistent organic pollutants (POPs) Review Article

Available online 6 April 2013
Sylwia Król, Bożena Zabiegała, Jacek Namieśnik

Determination of flavonoids and their metabolites by chromatographic techniques Review Article

Available online 1 April 2013
Małgorzata Szultka, Katarzyna Papaj, Aleksandra Rusin, Wiesław Szeja, Bogusław Buszewski

Strategies for structure elucidation of small molecules using gas chromatography-mass spectrometric data Review Article

Available online 1 April 2013
Liangxiao Zhang, Chunlan Tang, Dongsheng Cao, Yingxu Zeng, Binbin Tan, Maomao Zeng, Wei Fan, Hongbin Xiao, Yizeng Liang

Sheldon Manufacturing, Inc. Announces ISO 9001:2008 Certification

2013-04-29T08:07:00.000+01:00

Sheldon Manufacturing, Inc., manufacturer of constant temperature equipment under the SHEL LAB and Lab Armor brands, has announced the company is now certified as an ISO 9001:2008, Quality Management Systems compliant organization. This certification is accredited by National Quality Assurance, USA and is effective February 27, 2013.

Sheldon Manufacturing, Inc. is a leading manufacturer of high quality and innovative constant temperature equipment to the global market. Major product lines include incubators, humidity test chambers, laboratory ovens, water baths, bead baths, and anaerobic chambers for the life science, pharmaceutical, biomedical, environmental and industrial markets.

This certification reflects Sheldon's long-standing commitment to providing high-quality products to its customers worldwide.” said Dan Sheldon, President of Sheldon Manufacturing, Inc. “Maintaining our ISO 9001:2008 certification will help us to continue to have strong policies, practices and procedures and advance our position as a quality leader.”

The ISO 9001:2008 certification builds on the many leading-edge manufacturing processes that Sheldon Manufacturing, Inc. has put in place since the company adopted the Lean Management philosophy in 2008. Since then, Sheldon has put in place a rigorous continuous improvement process, reduced lead times and invested in high precision manufacturing equipment to improve quality and throughput.

New Laboratory Fluidics Solutions

2013-04-29T08:05:00.000+01:00

Harvard Apparatus, the world leader in syringe pumps, announces its new 2013 Catalog of Syringe and Peristaltic Pumps.

Included in this catalog are a number of new products, including;

A constant pressure syringe pump, The PHD ULTRA CP
The PHD ULTRA XF, delivering forces greater than 1,000 lbs. for high pressure applications
The all new Harvard Peristaltic Pump series

The new Peristaltic Pumps feature:

A product design that separates the electronic control from the pumping mechanism to enable placement of the drive mechanism in fume hoods and incubators.
Enhanced programming capabilities that allow programming and storing methods with multiple flow rates, start/stop times, and flow ramp rates.
The ability to use different pump mechanisms with the same electronic controller provides options for a broader range of flow rates.

Harvard Apparatus offers syringe, peristaltic and continuous flow pumps to suit almost every application. With over 100 years in designing and manufacturing reliable syringe and peristaltic pumps, Harvard Apparatus has the scientific depth and fluidics knowledge to recommend the best pump solutions for challenging laboratory applications. Superior technical experts are available to assist researchers from start to finish.

For complete specifications on these new pumps, go to www.HarvardApparatus.com or contact our Technical Support Department at techsupport@harvardapparatus.com

Just Published: Analytica Chimica Acta

2013-04-26T09:35:00.003+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Analytica Chimica Acta
http://rss.sciencedirect.com/publication/science/5216

Selected papers from the latest issue:

Microfluidic bead-based multienzyme-nanoparticle amplification for detection of circulating tumor cells in the blood using quantum dots labels Original Research Article

Available online 6 April 2013
He Zhang, Xin Fu, Jiayi Hu, Zhenjun Zhu

Graphical abstract

A microfluidic beads-based nucleic acid sensor for sensitive detection of circulating tumor cells (CTCs) in the blood using multienzyme-nanoparticle amplification and quantum dots labels was developed. The chip-based CTCs analysis could detect reverse transcription-polymerase chain reaction (RT-PCR) products of tumor cell as low as 1 tumor cell (e.g. CEA expressing cell) in 1mL blood sample. This microfluidic beads-based nucleic acid sensor is a promising platform for disease-related nucleic acid molecules at the lowest level at their earliest incidence.

Fabrication of β-cyclodextrin-coated poly (diallyldimethylammonium chloride)-functionalized graphene composite film modified glassy carbon-rotating disk electrode and its application for simultaneous electrochemical determination colorants of sunset yellow and tartrazine Original Research Article

Available online 6 April 2013
Xiaoliang Ye, Yongling Du, Daban Lu, Chunming Wang

Graphical abstract

Warping Methods for Spectroscopic and Chromatographic Signal Alignment: A Tutorial Review Review Article

Available online 6 April 2013
Tom G. Bloemberg, Jan Gerretzen, Anton Lunshof, Ron Wehrens, Lutgarde M.C. Buydens

Graphical abstract

Highlights

► The concepts of warping and alignment are introduced. ► The most important warping methods are critically reviewed and explained. ► Reference selection, evaluation and place of warping in preprocessing are discussed. ► Some pitfalls, especially for LC-MS and similar data, are addressed. ► Examples are provided, together with programming scripts to rework and extend them.

Ion-exchange and hydrophobic interactions affecting selectivity for neutral and charged solutes on three structurally similar agglomerated ion-exchange and mixed-mode stationary phases Original Research Article

Available online 6 April 2013
Artaches A. Kazarian, Mark R. Taylor, Paul R. Haddad, Pavel N. Nesterenko, Brett Paull

Graphical abstract

Simultaneous determination of aflatoxins B2 and G2 in peanuts using spectrofluorescence coupled with PARAFAC Original Research Article

Available online 2 April 2013
A.S. Luna, R.A. Luiz, I.C.A. Lima, P.H. Março, P. Valderrama, R. Boqué, J. Ferré

Graphical abstract

Thorough Tuning of the Aspect Ratio of Gold Nanorods Using Response Surface Methodology Original Research Article

Available online 2 April 2013
M. Reza Hormozi-Nezhad, Hossein Robatjazi, Mehdi Jalali-Heravi

Graphical abstract

Highly reproducible SERS-active Au nanostructures prepared by simple electrodeposition: Origin of SERS activity and applications as electrochemical substrates Original Research Article

Available online 2 April 2013
Suhee Choi, Miri Ahn, Jongwon Kim

Graphical abstract

Comprehensive Tissue Biorepository and Collection Services

2013-04-26T09:34:00.000+01:00

AMSBIO has announced further expansion of its tissue biorepository and collection services** to now include blood products from human donors with auto-immune and neurological conditions. Whole blood, plasma, serum, PBMCs and cerebrospinal fluid samples are available from a wide variety of donors. In addition AMSBIO is now able to offer collection services of patient samples that meet the demographic and medical history requirements of specific research studies.

Drawing upon over 20 years of serving this market - AMSBIO has established one of the most comprehensive ranges of tissue products to advance personalised medicine by putting these valuable samples in the hands of leading researchers.

Samples are available isolated from hundreds of different source tissues including human normal and diseased tissues, and a variety of genetic model organisms including mouse, rat, primates and plant species. These specimens are provided ready-to-use enabling the immediate study of molecules of interest eliminating the need for time consuming in-house sample collection and preparation.

These tissue products further extend AMSBIO's extensive bank of clinical and veterinary specimens that form a unique range of specimens in formalin fixed paraffin embedded (FFPE) or snap frozen formats. This extensive library of samples includes genomic DNA preparations, tissue specific PCR-ready first strand cDNAs, universal cDNA and 96 well and 384 well cDNA panels. Total, universal RNA and micro and total protein lysates are also available.

All tissue products are produced using rigorous standard operating procedures and through ethical procurement to ensure only the highest quality materials. For further information on our tissue biorepository and collection services please visit http://www.amsbio.com/Tissues.aspx** or contact AMSBIO on +44-1235-828200 / +1-800-987-0985 or email info@amsbio.com.

Now Evaporate without Bumping!

2013-04-26T09:31:00.000+01:00

The NEW Centrifan™ PE Evaporator/Concentrator from KD Scientific is a small volume evaporator that eliminates the problem of bumping using patented SBT (Self blowdown technology). SBT allows solvent drying using heated, circulating gas flow and NO VACUUM PUMP!

The Centrifan™ PE dries solvents directly in the vial, increasing evaporation efficiency in your laboratory.

Features and Benefits:

Easy-to-Use - No Monitoring
Quick Set-Up - Put in the Samples and close the cover
Small Footprint
Dry Directly in Vials
Cost Effective
NO VACUUM PUMP - NO BUMPING!

Applications:

Organic Compound Evaporation
Cold Room Evaporator
Toxic & Radio Labeled compounds
Dichoromethane, Chloroform, DMSO & Oil Polymers
Protein Purification
Lyophilization, Dissolved Minerals & Crystal Growth

In the Centrifan™ PE samples are dried in 20ml scintillation or other common vials and there is no need for a vacuum pump or a large supply of blow-down gas. This protects samples from loss and captures toxic vapors and materials in a closed system.

Just Published: Talanta

2013-04-25T08:28:00.004+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Talanta

http://rss.sciencedirect.com/publication/science/5288

Selected papers from the latest issue:

Silver deposited polystyrene (PS) microspheres for Surface-enhanced Raman spectroscopic-encoding and rapid label-free detection of melamine in milk powder Original Research Article

Available online 6 April 2013
Yanhua Zhao, Weiqi Luo, Pushpinder Kanda, Hanwen Cheng, Yuanyuan Chen, Suiping Wang, Shuangyan Huan

Graphical abstract

Silver nanoparticles coated amino polystyrene microsphere (PS-NH2/Ag NPs) substrates with uniform morphology and high SERS activity were synthesized using novel controlled deposition method. The promising application of this kind of PS-NH2/Ag NPs substrates for nondestructive detection, SERS encoding and ultrasensitive detection of melamine in milk powder was explored.

Non-destructive analyses on a Meteorite fragment fell in the Madrid city centre at 1896 Original Research Article

Available online 6 April 2013
Javier Garcia-Guinea, Laura Tormo, Alvaro Rubio Ordoñez, Olga Garcia-Moreno

A Label-Free Signal Amplification Assay for DNA Detection Based on Exonuclease III and Nucleic Acid Dye SYBR Green I Original Research Article

Available online 6 April 2013
Aihua Zheng, Ming Luo, Dongshan Xiang, Xia Xiang, Xinghu Ji, Zhike He

Probing trace Hg2+ in a microfluidic chip coupled with in situ near-infrared fluorescence detection Original Research Article

Available online 6 April 2013
Jiaqin Wang, Hui Chen, Peng Zhang, Zhengyong Zhang, Song Zhang, Jilie Kong

Fast HPLC-DAD quantification procedure for selected sulfonamids, metronidazole and chloramphenicol in wastewaters using second-order calibration based on MCR-ALS Original Research Article

Available online 6 April 2013
Maryam Vosough, Hadi Esfahani Mashhadiabbas

Determination of vanadium in soils and sediments by the slurry sampling graphite furnace atomic absorption spectrometry using permanent modifiers Original Research Article

Available online 6 April 2013
Ryszard Dobrowolski, Agnieszka Adamczyk, Magdalena Otto

Ultrasound assisted dialysis of semi-permeable membrane devices for the simultaneous analysis of a wide number of persistent organic pollutants Original Research Article

Available online 6 April 2013
Julen Bustamante, Patricia Navarro, Gorka Arana, Alberto de Diego, Juan Manuel Madariaga

A Facile Label-Free Electrochemiluminescence Biosensor for Target Protein Specific Recognition based on the Controlled-Release Delivery System Original Research Article

Available online 6 April 2013
Xiaoyan Yang, Aiguo Wang, Jilong Liu

A sensitive NADH and ethanol biosensor based on graphene-Au nanorods nanocomposites Original Research Article

Available online 6 April 2013
Li Li, Hongmei Lu, Liu Deng

10.

Determination of PCDD/Fs, PBDD/Fs and dioxin-like PCBs in human milk from mothers residing in the rural areas in Flanders, using the CALUX bioassay and GC-HRMS Original Research Article

Available online 6 April 2013
K. Croes, A. Colles, G. Koppen, S. De Galan, T. Vandermarken, E. Govarts, L. Bruckers, V. Nelen, G. Schoeters, N. Van Larebeke, M.S. Denison, M. Mampaey, W. Baeyens

11.

New flow-through analytical system based on ion-selective field effect transistors with optimized calcium selective photocurable membrane for bovine serum analysis Original Research Article

Available online 6 April 2013
N. Abramova, A. Bratov, A. Ipatov, S. Levichev, A. Aris, E.M. Rodríguez

12.

Direct deconvolution approach for depth profiling of element concentrations in multi-layered materials by confocal micro-beam X-ray fluorescence spectrometry Original Research Article

Available online 6 April 2013
Pawel Wrobel, Mateusz Czyzycki

Graphical abstract

13.

Simultaneous determination of PPCPs, EDCs, and artificial sweeteners in environmental water samples using a single-step SPE coupled with HPLC−MS/MS and isotope dilution Original Research Article

Available online 6 April 2013
Ngoc Han Tran, Jiangyong Hu, Say Leong Ong

14.

DETERMINATION OF Zn-, Cu- AND Mn-GLYCINATE COMPLEXES IN FEED SAMPLES AND IN-VITRO AND IN-VIVO ASSAYS TO ASSESS THEIR BIOACCESSIBILITY IN FEED SAMPLES Original Research Article

Available online 6 April 2013
Véronique Vacchina, Catherine Ionescu, Sébastien Oguey, Ryszard Lobinski

15.

Aptamer Functionalized Gold Nanoparticles Based Fluorescent Probe for the Detection of Mercury (II) ion in Aqueous Solution Original Research Article

Available online 3 April 2013
Daidi Tan, Yue He, Xiaojing Xing, Yu Zhao, Hongwu Tang, Daiwen Pang

16.

Identification and on-line monitoring of Reduced Sulphur Species (RSS) by voltammetry in oxic waters Original Research Article

Available online 2 April 2013
Pierre-Jean Superville, Ivanka Pižeta, Dario Omanović, Gabriel Billon

17.

Stable isotope ratio measurements of Cu and Zn in mineral dust (bulk and size fractions) from the Taklimakan Desert and the Sahel and in aerosols from the eastern tropical North Atlantic Ocean

Available online 2 April 2013
Shuofei Dong, Dominik J. Weiss, Stanislav Strekopytov, Katharina Kreissig, Youbin Sun, Alex R. Baker, Paola Formenti

18.

A vortex-assisted MSPD method for the extraction of pesticide residues from fish liver and crab hepatopancreas with determination by GC–MS Original Research Article

Available online 2 April 2013
Sergiane Souza Caldas, Cátia Marian Bolzan, Eliana Jaime de Menezes, Ana Laura Venquiaruti Escarrone, Camila de Martinez Gaspar Martins, Adalto Bianchini, Ednei Gilberto Primel

19.

Thallium (III) determination in the Baltic seawater samples by ICP MS after preconcentration on SGX C18 modified with DDTC Original Research Article

Available online 1 April 2013
Beata Krasnodębska-Ostręga, Monika Sadowska, Katarzyna Piotrowska, Marta Wojda

20.

Colorimetric sensing of copper(II) based on catalytic etching of gold nanoparticles Original Research Article

Available online 31 March 2013
Zhaopeng Chen, Ruili Liu, Shasha Wang, Chengli Qu, Lingxin Chen, Zhuo Wang

21.

Portable Method of Measuring Gaseous Acetone Concentrations Original Research Article

Available online 31 March 2013
Adam D. Worrall, Jonathan A. Bernstein, Anastasios P. Angelopoulos

22.

Analysis of Gibberellins as Free Acids by Ultra Performance Liquid Chromatography−Tandem Mass Spectrometry Original Research Article

Available online 31 March 2013
Terezie Urbanová, Danuše Tarkowská, Ondřej Novák, Miroslav Strnad, Peter Hedden

Graphical abstract

23.

On the isohydricity concept – some comments Original Research Article

Available online 31 March 2013
Agustin G. Asuero, Bogusław Pilarski, Agnieszka Dobkowska, Tadeusz Michałowski

Maximise batch production for HBLED manufacture with Oxford Instruments' newest tool

2013-04-25T08:27:00.001+01:00

Oxford Instruments Plasma Technology has just announced an evolution in batch etch technology with the launch of the PlasmaPro^®1000 Astrea etch system, a large batch etch solution for PSS, GaN and AlGaInP that will offer HBLED production manufacturers high throughput coupled with industry leading Cost of Ownership (CoO) . The launch is being made at the LED China exhibition in Shanghai this week, where Dr Mark Dineen, Oxford Instruments HBLED Product Manager will present the new system to the LED China Conference delegates.

“The PlasmaPro1000 Astrea is our ultimate batch etch tool, building on over 15 Years experience as a major supplier to the HBLED industry”, says Dr Mark Dineen, Oxford Instruments Plasma Technology’s HBLED Product Manager, “Today’s HBLED manufacturers justifiably demand high yield, high throughput, optimum device quality and low cost of ownership. Our PlasmaPro1000 Astrea large batch etch system offers solutions for all of these.”

With wafer batch sizes from 55 x 2” to 3 x 8”, the system has been designed specifically for the harsh chemistries required for HBLED materials. The PlasmaPro1000 Astrea delivers low damage, high yield processes ensuring the maximum light output from customers’ chips. This is a highly configurable system, with process chambers that are available as standalone modules or in cluster configurations, available on a four sided cluster tool capable of supporting up to three process modules.

Designed to ensure high system availability and ease of serviceability, key system features and benefits include:

· Industry leading >690mm large area source for highly uniform plasma

· 490mm electrode giving unparalleled throughput from batch sizes of 55x2”, 14x4”, 7x6” and 3x8”

· High conductance pumping system

· Dual entry gas inlet for ease of process tuning

· Maximised clamping for wafer cooling

· Z-movement electrode for ultimate uniformity

· Reliable hardware and ease of serviceability for excellent uptime

Dan Ayres, Managing Director of Oxford Instruments Plasma Technology comments, “This advanced and innovative system has been developed to address the exacting needs of HBLED Production users, who demand not only the very latest technological innovations, but also the superb customer support offered by our Company.

As an industry leading manufacturer of systems for plasma etch and deposition, Oxford Instruments constantly strives to improve and evolve its systems to provide the ultimate tool. With access to our exclusive library of over 6,000 process recipes, built up over 25 years as a leading plasma tool manufacturer, our customers are guaranteed an excellent product with comprehensive, market leading backup.”

Cheminert® C65 Integrated Motor/Stream Selector for OEM Applications

2013-04-25T08:24:00.002+01:00

VICI Valco’s new Cheminert C65 Series Liquid Handling Stream Selector is our first integrated motor/valve assembly designed specifically to be built into an OEM system. Using the well-proven Cheminert LC valve design and the 24 volt motor from our popular microelectric actuators, the C65 needs only to be connected to the instrument's power supply. The optional Serial Interface board permits RS232 communications for both position input control and confirmation of valve position.

All these features are built into a compact and lightweight package, available in 4, 6, 8, and 10 position configurations, with a choice of 1/4-28 fittings for 1/8” OD tubing, and 10-32 or 1/4-28 for 1/16” OD tubing. Save space and cost with the C65 series stream selector.

Just Published: Journal of Chromatography B

2013-04-24T09:33:00.002+01:00

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Journal of Chromatography B
http://rss.sciencedirect.com/publication/science/7220

Selected papers from the latest issue:

Determination of acyl-CoA esters and acyl-CoA synthetase activity in mouse brain areas by liquid chromatography - electrospray ionization - tandem mass spectrometry Original Research Article

Available online 6 April 2013
Fumiyo Kasuya, Teiichi Masuyama, Taku Yamashita, Kazuo Nakamoto, Shougo Tokuyama, Hiromi Kawakami

Characterization of metabolites of 20(S)-protopanaxadiol in rats using ultra-performance liquid chromatography/quadrupole-time-of-flight mass spectrometry Original Research Article

Available online 6 April 2013
Xin Jin, Song-Lin Li, Zhen-hai Zhang, Fen-xia Zhu, E Sun, Ying-jie Wei, Xiao-Bin Jia

Simultaneous determination of iloperidone and its two active metabolites in human plasma by liquid chromatography-tandem mass spectrometry: Application to a pharmacokinetic study Original Research Article

Available online 3 April 2013
Mengmeng Jia, Jie Li, Xiaomeng He, Mingzhou Liu, Ying Zhou, Yue Fan, Weiyong Li

Comparative study of label and label-free techniques using shotgun proteomics for relative protein quantification Original Research Article

Available online 31 March 2013
Marcus O.D. Sjödin, Magnus Wetterhall, Kim Kultima, Konstantin Artemenko

Protein Concentration Prior to Separation & Analysis

2013-04-24T09:32:00.001+01:00

Many research applications require concentration of dilute protein solutions. The miVac sample concentrator from Genevac provides a proven efficient and cost effective alternative to membrane centrifugation techniques for protein concentration prior to separation or analysis.

For laboratories looking to pre-concentrate protein solutions prior to chromatographic separation and analysis – membrane centrifugation was traditionally the method of choice. However, for laboratories that use large numbers of membranes per year there is an alternative, the miVac sample concentrator. Using membrane centrifugation valuable sample is often lost due to protein binding to the membrane. By comparison using a miVac sample concentrator ensures complete sample recovery even when taking proteins to very high concentrations. For protein laboratories that handle large numbers of protein samples - the miVac also offers the benefit of greatly reduced spending on consumables.

The miVac range has been designed to meet the requirements for speedy, yet careful biological sample concentration. Each miVac sample concentrator is designed to provide very high performance, precise temperature control and ease of use – all within a small benchtop footprint. miVac sample concentrators are capable of removing water and organic solvents from a variety of sample formats including tubes, microplates, and vials. Built-in stored methods for drying aqueous and alcohol-based samples improve performance and optimise concentration time.