38 New Automated Colony Counter For Delivering Accurate Results
Synbiosis have introduced its aCOLyte 3 cost-effective colony counting system, which is ideal for microbiologists that need to significantly increase their throughput, as well as improve count accuracy. The new aCOLyte 3 is a low-cost automated colony counter, designed for a rapid count of pour, spread and spiral plates. The system can read plates of up to 90mm in seconds, generating precise plate count results up to ten times faster than manual counts. The numerical count data and plate images can be directly transferred to Excel or Open office to avoid errors in data transfer, ensuring accurate GLP compliant result reporting and archiving every time.
The aCOLyte 3 provides full colour image display and comes complete with software based on Synbiosis’ powerful ProtoCOL 3 software (independently validated as a highly accurate colony counting package). The system can be supplied with a computer or scientists can utilise their own laptop or desktop PC and simply connect the aCOLyte 3 via a USB port.
The aCOLyte 3 is lit by white LEDs mounted above and below the plate, enabling accurate detection of colonies as small as 0.3 mm. For laboratories where strong ambient light could interfere, there is also the option to have a detachable screen fitted to prevent any reflection or glare affecting the count.
Martin Smith of Synbiosis stated: “Microbiologists often have to count hundreds of colonies every day. This can be time consuming, tiring and error prone. What they need is simple to set up, yet inexpensive automation for detecting difficult to see colonies, so they can put the plates in a device and quickly obtain accurate counts.”
Martin added: “Our design team has listened. After a year of development work, we are confident that our resulting aCOLyte 3 system is the best value technology available and will significantly increase microbial testing throughput in any food, environmental or clinical laboratory which chooses an aCOLyte 3 colony counter.”
MORE INFO. 73
New Improved Folded Capillary Cell Enhances Zeta Potential Measurement
Malvern Instruments has introduced a new, improved disposable folded capillary cell for use in its Zetasizer Nano particle and molecular characterisation systems. The new cell is designed to further enhance the reproducibility of zeta potential measurements. It replaces the previous model of folded capillary cell while providing the same ‘plug and play’ convenience for easy application and disposal. Although intended primarily for the measurement of zeta potential, the disposable folded capillary cell can also be used for size measurements and is fundamental to Malvern’s patented diffusion barrier technique for the reliable, high-sensitivity measurement of the electrophoretic mobility (or zeta potential) of labile biological molecules, such as proteins in solution.
Conventionally, a long linear capillary cell is used when measuring zeta potential in order to separate the measurement zone from the electrodes and to provide a sufficiently long surface for the development of a smooth electro-osmotic profile. Malvern’s folded capillary cell has all the advantages of a linear capillary cell while being completely disposable, for applications where there might otherwise be a risk of cross-contamination.
The folded capillary cell is also used in the diffusion barrier technique for measuring zeta potential, where sample is separated from the electrodes in order to avoid aggregation under the influence of the applied electric field. This is done by filling the cell with buffer, then introducing a small volume of sample into the measurement zone. In addition, the ability to measure size in the same cell before and after a zeta potential measurement enables checks to be made that ensure zeta potential measurement has not been affected by any aggregation of the sample.
The Malvern Zetasizer Nano range provides both exceptionally high performance and entry level systems that incorporate combinations of a particle size analyser, zeta potential analyser, molecular weight analyser, protein mobility and microrheology measurements. Particles and molecules from less than a nanometer in size to several microns can be analysed by a range of variants to suit different applications and budgets.
MORE INFO. 74
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