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Cyclon Cooling - Cyclon Cooling is a highly effective system developed by Astell Scientifi c to considerably reduce the time it takes to cool the load to a safe temperature. It is an advanced software development that combines the use of air ballast and a full water jacket for the fast cooling of bottled fl uid loads. Typically, in tests carried out on autoclave loads consisting of 100 x 500ml media bottles, cycle cooling times were reduced by up to 60% in comparison with a standard autoclave. Cyclon Cooling provides major benefi ts in laboratories where large quantities of culture media need to be processed quickly, since a signifi cant reduction in cycle time (and therefore an increase in the number of loads that can be processed in a day) can greatly improve effi ciency, and thus reduce costs. The environmental impact of the system is also signifi cant, since shorter cycle times inevitably mean reduced water and power consumption. The system is fully programmable so that during validation all parameters can be set to suit the types of fl uid being processed.
Internal Fan Cooling – This system, when used in combination with water jacket cooling and air ballast, is probably the most effective method of cooling fl uids and media in non-sealed containers. Fans (ideally magnetically driven to eliminate leakage from the chamber), are situated within the chamber itself. The fans in conjunction with baffl ed chamber surfaces create turbulence and force cooled air over the load, reducing the cooling time greatly. Internal fan cooling in conjunction with an external cooling system (i.e. jacket water cooling and air ballast) is one of the most effi cient ways of cooling the chamber and is ideal in situations where large fl uids loads need to be processed as quickly as possible. This results in cooling times up to 70% shorter than a standard machine fi tted with no cooling options.
In conclusion, the principle of autoclaving is simple, and steam sterilisation is still generally regarded as the most effective method of decontamination in the laboratory. Steam molecules condense on cooler microorganisms and transfer approximately 2500 joules of energy per gram of steam, very effi ciently heating the microorganisms to the temperature at which they are destroyed. However, whilst the effectiveness of an autoclave as a means of sterilisation is unquestionable, the effi ciency of a laboratory is also dependent of a variety of other factors, and in particular the time taken to carry out specifi c tasks, and how this can affect the ability to produce results within a certain timeframe.
It follows, therefore, that autoclave cycle times can be a critical factor in the smooth running of any laboratory. In some laboratories the ability to run (for example) four media cycles per day, rather than two, will inevitably mean a signifi cant improvement in productivity, which in turn will often result in a reduction in running costs. Therefore, the inclusion of a cooling system on your autoclave, and in particular the choice of the most suitable cooling system for a particular application, can ensure that autoclaving effi ciency is maximised in the busy, cost-conscious laboratory.
For further advice on choosing the best autoclave cooling system to suit your sterilisation requirements contact Astell or visit their comprehensive website at
www.astell.com
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New Design Added to Impressive Range of Ductless Fume Cabinets
Building on the success of their Chemcap ductless fume cabinets, Bigneat has introduced a brand new sash door model with the emphasis on operator comfort and safety. By incorporating a simple sliding sash at the front, Bigneat has modified their popular design to make it even easier to use. This, coupled with unrivalled filtration technology, makes the new Chemcap Easyglide Cabinet an invaluable addition to the laboratory.
Bigneat recently manufactured and supplied the first of its new Chemcap Easyglide cabinets to Butterworth Laboratories Ltd. According to Kevin Sweeney, Butterworth’s Facilities Manager and Health & Safety Officer, “Bigneat have always been eager to meet our requirements.” So when Butterworth analysts, developing TLC plates using a reagent delivered by a spray, noticed that their existing cabinets afforded them little protection from solvent fumes, Bigneat was quick to offer a solution. The resultant design is a significant improvement, Kevin observed. “The sash system affords greater protection of the breathing zone and our analysts are now able to see the spray droplets being drawn away from the sash and into the filters.” He added that “the sash door also enables the analyst to easily access the cabinet, aiding the installation of equipment and providing easy access for cleaning.” The additional features, such as the on-board sensor to remind the operator to lower the sash to its working position, Bigneat’s Easyglide cabinet ensures a safer laboratory environment.
As with all the cabinets designs within the Chemcap range, the new Easyglide model has been extensively tested. It benefits from design improvements established in recent model range developments so that more of the carbon media within the carbon filter is utilised. This has resulted in an improvement of 20% in the filter retention of potentially hazardous toxic chemicals.
The range also features an easy-to-use touch-button on/off control panel with incorporated service due indicator and audible low airflow alarm. View of the working area is excellent and makes a cabinet comfortable to use for
long periods. An option for all Chemcap cabinets is a bench cupboard/open stand unit which may be fitted with a ‘Services Option’ which includes a swan neck water tap with drip cup and gas tap.
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