The six-stage air microbial sampler is a six-stage mesh impingement air microbial sampler. It is a dual-function stepped multi-stage impact sampler that can be widely used in sanitation, bio-cleaning, pharmaceutical, fermentation, and other environments. The monitoring and related research and teaching departments conduct sampling research on airborne microorganisms, and the air microbial sampler (level 6) provides a basis for evaluating the microbial pollution hazards and their prevention measures in the air environment.
working principle
In addition to being able to measure the number of airborne microorganisms, the six-stage mesh-impact air microbial sampler measures the size of these particles, which is one of the important indicators for determining the microbial hazard of air. It is composed of six impactors, each stage is actually a single-stage sampler. With 6 repeated impact principles, most of the particles, especially in the trachea and lung sedimentation particles, basically collide, so it collects The range of particle sizes is naturally wider than that of a single stage, which is unmatched by some single-stage impact samplers, and the round nozzle of the sampler has higher sampling efficiency than the nozzles such as cracks. The relative humidity increased step by step (from 39% in the first stage to 88% in the sixth stage), which is very beneficial for the survival of vulnerable pathogenic microorganisms, especially virions. Because of its distinctive characteristics, it has been widely and effectively applied to the monitoring of airborne microorganisms, and it has not been used since its inception. Recommended by experts as an international standard sampler. The six-stage air microbial sampler simulates the anatomical structure and aerodynamic physiological characteristics of the human respiratory tract. The principle of inertial impact is used to collect the microbial particles suspended in the air hierarchically on the surface of the sampling medium, and then for culture and microbiological analysis.
Principle of use
The impactor is a 6-layer aluminum alloy disc with tiny perforations. The disc was lowered into agar plates with a sealing rubber ring between each disc, and the discs were firmly joined by three spring hooks. Each disc has 400 rows arranged in a circle, reduced layer by layer, and the standard sampling flow rate is 1 cubic å‘Ž (28.3 L/min). When the gas stream containing the microbial particles enters the sampling port of the uppermost layer, due to the layer-by-layer increase of the gas flow, different sizes of microbial ions impinge on the corresponding agar surface according to aerodynamic characteristics. The range of particle sizes captured at each stage is determined by the gas flow velocity of the pores of that stage and the particle interception rate of the previous stage. The particles captured by the upper and lower respiratory tracts of the first and second grades, the particles captured by the lower respiratory tract of the 3rd to 6th grades, replicate the penetration and deposition of these particles in the respiratory tract to a considerable extent. The six-stage air microbial sampler provides a plate with normal nutrient agar.
Product details
Martha Stewart Waste bags -60 Bags / 4 Rolls.Martha Stewart has been a trusted source on all things lifestyle for over 30 years. The pet space is no exception. As an avid animal lover and pet parent to several dogs including champion Chow Chows, she's been fully engrained in the pet industry, serving as a resource on how to best care for, train and live with pets. Every product in the Martha Stewart Pets line is hand selected by Martha as she takes a practical approach to pet care, ensuring quality, function and innovation. Martha`s pet supplies for dogs embody these qualities and are here to make caring for your dog simple and stress-free. The Martha Stewart Pets Waste Bags for All Dogs will make cleaning up after your dog easy, clean, and convenient. The poop bags for dogs offer rapid, leak-proof waste management for pet owners on the go. This way, you can go on more walks without worrying about dog poop leaking through your bag. You can trust the dog waste bags to stay clean and dry; they are pet supplies that work. The small trash bags are also tear-resistant, so you won`t get stuck on a walk with a torn dog bag. The doggie bags allow for fast and easy pick up because you won`t be worrying about tears, for dog supplies you can rely on. The dog bags pack contains light blue and metallic grey colored bags with cute designs of dog bones on the outer portion of the poop bags. This makes for stylish and aesthetically pleasing dog poop bags that you`ll enjoy carrying around. The doggie bags for poop come unscented, which is ideal for sensitive noses or those who do not desire an overwhelming fragrance. Measurements: The doggy bags come in large. Each dog poop bag measures 8. 6" x 12. 5" (21. 8cm x 31. 7cm). Each pet bag pack comes with 60 pet waste bags and 4 rolls of bags, so you will be stocked on your pet supplies for dogs. Refill rolls of the poo bags are to be used with the Martha Stewart dispenser. Directions: 1. Take your Martha Stewart poop bag and pull it over your hand like a glove. Pick up waste with your bagged hand. 2. With your other hand, grasp open end of the poop bag and pull it inside out. The waste will now be inside the bag. 3. Gently tie and knot the end until completely closed. Dispose of safely. WARNING: To avoid danger of suffocation, keep all dog bags for poop away from babies, children, and pets. Do not use plastic doggy bags in crates or carriers.
Martha Stewart Waste bags -60 Bags / 4 Rolls
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TEAR-RESISTANT - The small trash bags are tear-resistant, so you won`t get stuck with a torn dog bag. Dog waste bags also allow for fast and easy pick up
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UNSCENTED - The doggie bags are unscented, which is ideal for sensitive noses or those that do not desire an overwhelming fragrance
MEASUREMENTS - Waste bags measure 8. 6" x 12. 5" (21. 8 x 31. 7 centimeters), and each pack comes with 60 large bags and 4 rolls of bags, so you will be stocked on your pet supplies for dogs. Refill rolls are to be used with the Martha Stewart dispenser.
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