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109 - Agar moisture loss in Petri dish using an impact air sampler system
The optimal growing of colonies on a culture plate is obtained with an agar medium that has the correct volume, the correct level of moisture and is freshly prepared. The agar plates can lose moisture for high temperature during the storage and during the air sampling due to the impact of air on the agar surface. According to the literature the loss should be lower than 10%. It is here reported an example of SOP (Standard Operative procedure) to evaluate the loss of humidity on Petri dish during the air sampling by an active air sampler.
Learn more108 - The correct use of the I.Q., O.Q., P.Q. Qualification Manuals
O.Q. Manual has the target to verify that the instrument is working according to the supplier speci cation during operational activities.
Learn more107 - SOP (Standard Operating Procedure) for TRIO.BAS ISOLATOR Microbial Air Sampler
The TRIO.BAS ISOLATOR Microbial Air Sampler has been speci cally developed to be used in Isolator and in Multi Clean Rooms. The aspirating heads of the satellite units (1, 2 or 3) can be positioned in different location and commanded via cable from outside by a single comand unit. The main advantage is the fact that vacuum is not involved and all the potential problems due to the vacuum are not present. The connecting electrical cable may have different lenghts and it is easily connected and disconnected from the satellite units. The satellite units are compatible with the most commonly used sterilizing agents. 90 mm Petri dish or 55 mm Contact plates may be used.
Learn more106 - Suggested procedures for microbial air sampling
In environments with constant characteristics it is easier to provide “Acceptability Levels” to be used for routine work. It is not possible to set the same standards for all applications and the “Acceptability Limits” will vary considerably in different environments.
Learn more105 - Microbial Air sampler positioning
A microbial air sampler should be positioned with different orientations according to the purpose of the test in the considered area (e.g. risk evaluation). Are here reported several applications for the TRIO.BAS microbial air samplers.
Learn more104 - Data Integrity Good Practice in Microbial Environmental Monitoring
The following ten suggestions will help you to guarantee the integral application of the DIGP (Data Integrity Good Practice) in microbiological Environmental Monitoring.
Learn more103 - The TRIO.BAS C-D microbial air sampler to be used with Compact-Dry plates
Compact-Dry, Chromogenic enzime, CFU, Dehydrating uid, Film, TBC (Total Bacterial Count), TMC (Total Mold count). Compact-Dry is a ready-to-use system reducing the time needed to perform microbial testing on food, beverage, meat, cosmetics, and raw materials.
Learn more102 - Evaluation of two microbial active air samplers
The aim of this research was to evaluate and compare the results of two microbial air samplers present on the market: the non portable Anderson one stage model and the portable TRIO.BAS MONO system. The air samples were collected in 3 different environments with the two air samplers positioned 1 meter from the other, in absence of personell during the aspiration. The results showed that the variability between the two instruments was not signi cative and was comparable.
Learn more101 - The “physical laws” that regulate the diffusion and deposition of particles in the air
The here repor ted de nitions of few fundamental physical laws can help to understand the mechanism of particle behavior and consider the consequent air sampling difficulties. Brownian motion: As the par ticles migrate through a body of air, random impacts from individual molecules will cause them to veer from course. Drag coefficient: It is the ratio of the force of gravity to the iner tial force on a par ticle in uid. It indicates how a par ticle will resist any force that could cause a change in the par ticle velocity. Smaller par ticles have smaller drag coef cients due to their lesser masses.
Learn more100 - The physical tests to obtain the safety certifications of TRIO.BAS
The TRIO.BAS air samplers were tested by the official authorities to evaluate their safety performances according to the european and international rules.
Learn more99 - Microbial Air Sampling Collection Efficiency – The number of Stokes
The efficacy of microbial air sampling collection by impact on agar samplers is characterized by a number without dimensions, called the “number of Stokes”. This number, called (d50), indicates the value that refers to the aerodynamic diameter of particulate that are collected by 50%. Hinds (1982) considers the value (d50) as the diameter of particulates that have a bigger diameter and theoretically are all collected.
Learn more98 - The Micro-Organisms in the Air
Of all environmental, air is the simplest one and it occurs in a single phase, gas. Air is not a natural environment for the growth and reproduction of microorganisms. It does not contain necessary amount of moisture and utilizable form of nutrient. In addition to gasses, dust particles and water vapour, air also contains microorganisms. There are vegetative cells and spores of bacteria, fungi and algae, viruses and protozoan cysts.
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