Laboratory Products 21 Fast Purification of Protein Samples


Want to find a simpler way to purify native and recombinant proteins? Then you should try Rainin’s new PureSpeed™ Protein Tips from Anachem. The affinity resin incorporated in the base of the pipette tip, captures, purifies and enriches the protein of interest by bidirectional flow of sample volume through the tip bed. These innovative tips produce the highest concentration of purified protein, allowing many options for downstream functional assays.


Gravity-fed affinity columns and spin columns do the job, but they can be time consuming and elution volumes can be large, diluting the final sample. Unlike these traditional methods, PureSpeed™ Protein Tip’s unique process draws the sample repeatedly over a low dead volume, packed resin bed, offering controlled contact time with the resin and higher binding kinetics. To eliminate false positives, an efficient wash step removes any contaminants and the final low volume elution step produces highly concentrated functional protein.


PureSpeed™ Protein Tips are designed for use with the LTS version of the E4™XLS™ electronic pipette. The E4™XLS™ has a dedicated PureSpeed™ mode that enables protein purification to be programmed and controlled in a semi-automated process, simplifying and enhancing the performance of the tip.


Arrange a trial in your lab or request a PureSpeed™ Brochure by visiting www.anachem.co.uk/purespeed for the chance to win an E4™XLS™ Electronic Pipette. LAB PRODUCTS Circle no. 580


High-Precision Measurement Balances


Adam Equipment, a world-class developer and manufacturer of scales and balances, offers PW analytical balances as a precise and cost- effective way to measure to 0.1mg. The PW provides many practical design features, including durable metal construction, standard internal motorised calibration and a large backlit dual display that shows text prompts to help the user set up the balance quickly. Highlighted tare keys stand out for accessibility, while other buttons operate set-up functions, turn the balance on or off, send data to a printer, calibrate and change modes and weighing units.


The bi-directional RS-232 interface enables reliable and speedy data transfer from the balance to printers or computers. This allows foolproof data recording and traceability, letting the operator focus on data analysis. A range of useful built-in applications includes modes for density, percentage, comparison and check weighing, plus counting and dynamic/animal weighing.


The PW offers 16 weighing units, including a custom unit. With capacities ranging from 120g to 250g and readabilities at 0.1mg, there is a PW analytical balance available for most lab applications.


LAB PRODUCTS Circle no. 581 ADVERTORIAL


New Pro-Juice Refractometer Enables Confident Quality Assurance and Control Testing of Orange Juice


For many years now, beverage manufacturers have adopted digital refractometers as their primary instrument for measuring the final dilution ratio (°Brix) of re-constituted fruit juice not only to assure product quality but also in an attempt to reduce losses by


tightly controlling concentrate yields. For most fruit types this has been successful but for one of the most commonly produced juices, the high accuracy measurement achieved by latest technology digital refractometers has unmasked an erratic behaviour within an orange juice sample that prevents tighter dilution control, which in turn negates any opportunity of cost reduction by way of lowering target values without the risk of compromising minimum specifications defined by regulation.


Over the past two years, leading refractometer manufacturer and xylem company Bellingham + Stanley®


has been working alongside a major fruit juice producer in order


to develop an instrument that can achieve the same high accuracy results for orange juice samples as it can for other fruit based juices.


By focussing on the practical handling of the sample prior to high accuracy measurement, Bellingham + Stanley has designed the Pro-Juice Refractometer based on the World leading RFM340+ refractometer to offer a measurement accuracy of 0.01 °Brix for sucrose solutions and more importantly, a reproducibility of 0.02 °Brix between orange juice samples, regardless of temperature deviation or operator skill level.


The Pro-Juice Refractometer was previewed at Brau Beviale in November 2011 and will feature at a number of international laboratory and beverage shows throughout 2012. For details contact: sales@bellinghamandstanley.co.uk +44 (0) 1892 500400.


Circle no. 582 Circle no. 583


LABMATE UK & IRELAND - APRIL 2012


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36