![]() Therefore, the UV-C light also serves to prevent carry-over contamination from previous experiments.©LabX Media Group Inc.-Lab Manager. ![]() In addition to its germicidal properties, UV-C light also causes breaks in strands of DNA that prevent the DNA from being amplified during PCR. The lights are also placed on a timer to reduce the risk of UV exposure. These hoods are outfitted with UV-C germicidal lights to disinfect the work surface when the hood is not in use. Adapted from laminar flow hoods, PCR workstations provide HEPA-filtered, sterile air within the hood. PCR workstations were designed to minimize this problem. What are Exhaust Flame Arrestors Exhaust flame arrestors are part of the explosion proof system found on diesel engines used in Zone 2 hazardous areas. Unfortunately, a single piece of contaminating DNA can also be amplified, making it extremely important that researchers work within a sterilized area that prevents cross contamination of samples. PCR can turn a single piece of DNA into more than a million pieces in the matter of hours. Polymerase chain reaction (PCR) is a common technique used in molecular biology to exponentially amplify a target region of DNA or RNA. Read more about the differences between horizontal and vertical laminar flow hoods Fume Exhaust Hoods ![]() These exhaust fans are specially designed for places that may contain inflammable gas or compounds stored or produced. However, they direct the airflow directly at the operator’s face and require more depth to accommodate placement of the fan filter unit at the rear of the hood. The explosion proof exhaust fans are suitable for installing in warehouses, tanks, mills etc. HLF hoods minimize air turbulence (and particle backflow) on the work surface except where equipment disrupts the horizontal airflow. Find many great new & used options and get the best deals for EXHAUST FAN Commercial - Explosion Proof - 24' - 1/3 Hp - 230/460V - 4975 CFM at the best online prices at eBay Free shipping for many products Skip to main content. VLF hoods create turbulent air flow when air strikes the work surface, requiring sterile work to be performed above the work surface. In addition, a sash at the front of the VLF hood provides a barrier between air exiting the hood and the operator’s face. Motor is 115V, 1 phase and has thermal overload protection. So why choose one over the other? Vertical laminar flow hoods (VLF Hoods) require less floor space, but more overhead clearance. Explosion proof blowers have epoxy coated non-sparking aluminum impeller wheels. Both provide excellent protection of products from particulates and cross-contamination, but do not protect the operator or environment. These hoods use a vertical or horizontal airflow design. Laminar flow hoods (also called laminar flow clean benches) force air through a HEPA or ULPA filter to create a clean work area free of nearly all contaminating particulates, including bacteria, mold spores and many viruses. Protection of product, operator and environmentīiological safety cabinets combine aspects of both hood types: a laminar flow of micro-filtered air and negative-pressure containment of bio-hazard fumes. Where ducting is impractical, ductless hoods are also available for removal of non-hazardous contaminants (fumes or particles), using either HEPA or activated carbon filters. Protection of personnel and lab environment from substances generated inside the enclosureįor fume containment, laboratory fume hoods use a ducted ventilation system that maintains negative pressure. Such hoods, often called laminar flow workstations or clean benches, use a flow of HEPA-filtered air to prevent influx of viable and non-viable particles into the enclosure and to sweep away any contaminants generated by the work process. For those cases, there are hazardous duty and explosion-proof (EXP) motors. Product protection from particulate contaminants in the lab environment, including microbes ![]() Work with school science department manager, faculty to assess. Laboratory hoods serve a number of critical purposes in the lab environment. Explosion and fire at an Ohio State University chemistry lab. ![]()
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