Tag Archives: contamination

1034–1042 A. Krofová, P. Kic and M. Müller
Influence of dust pollution in the laboratory on the strength of adhesive bond
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Influence of dust pollution in the laboratory on the strength of adhesive bond

A. Krofová¹*, P. Kic² and M. Müller¹

¹Czech University of Life Sciences Prague, Faculty of Engineering, Department Material Science and Manufacturing Technology, Kamýcká 129, CZ 165 21, Czech Republic
²Czech University of Life Sciences Prague, Faculty of Engineering, Department of Technological Equipment of Buildings, Kamýcká 129, CZ 165 21, Czech Republic
*Correspondence: kofovaa@tf.czu.cz

Abstract:

The main aim of this paper is to evaluate the influence of microclimate conditions on the bond strength in the research laboratory in the Faculty of Engineering at the Czech University of Life Sciences Prague. The main attention is paid especially to the contamination of the working environment with dust particles. In the frame of this research the concentration and size of dust particles in the air was measured by the aerosol monitor DustTRAK II Model 8530 with impactors for measurement of size fractions PM1, PM2.5, PM4 and PM10. The adhesive bonds were created according to the ISO standards from Duralumin material specimens with different type of twocomponent epoxy adhesives under different conditions of ventilation (0%, 50% and 100% of ventilation rate). The tensile strength of created specimens was measured by universal testing machine for tensile strength measurement – LABTest 5.50ST. The results of measurement were evaluated by statistical methods and summarized in the conclusions. There is no significant difference in the strength of the bond when applied various performance of ventilation.

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1342-1350 A. Krofová and P. Kic
Ventilation and microclimatic conditions in the laboratory of adhesive bonding
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Ventilation and microclimatic conditions in the laboratory of adhesive bonding

A. Krofová¹* and P. Kic²

¹Czech University of Life Sciences Prague, Faculty of Engineering, Department Material Science and Manufacturing Technology, Kamýcká 129, CZ165 21 Prague, Czech Republic
²Czech University of Life Sciences Prague, Faculty of Engineering, Department of Technological Equipment of Buildings, Kamýcká 129, CZ 165 21 Prague, Czech Republic
*Correspondence: kofovaa@tf.czu.cz

Abstract:

The aim of this paper is to present the results of the research focused on the ventilation and microclimatic conditions in the laboratory of adhesive bonding. This special large underground laboratory is used for the research and teaching purposes during the whole year. The experiments provided in the laboratory require the use of different chemicals, adhesives and glues for the preparation of specimens for the testing various methods of adhesive bonding of metals and wood. There are intensively released chemical pollutants into the indoor environment of the laboratory during those processes. If there are taking place in the lab at the same time the classes with students (maximum 26 persons) there are also produced in that space products of the metabolism. To ensure the hygienic conditions for researchers and students, the laboratory must be adequately ventilated, but it is also necessary to ensure the desired thermal state of the environment. The results of measurements of indoor microclimate in this laboratory during the adhesive bonding processes are also presented in this paper. The experience and new knowledge useful for the future research and practical designs are summarized in the conclusions of this paper.

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333-338 M. Roasto, K. Kovalenko, K. Praakle-Amin,K. Meremäe, T. Tamme, T. Kramarenko
Review of the contamination and health risks related to Campylobacter spp. and Listeria monocytogenes in the food supply with special reference to Estonia and Latvia
Abstract |
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Review of the contamination and health risks related to Campylobacter spp. and Listeria monocytogenes in the food supply with special reference to Estonia and Latvia

M. Roasto¹, K. Kovalenko², K. Praakle-Amin³,K. Meremäe¹, T. Tamme¹, T. Kramarenko⁴

¹Estonian University of Life Sciences, Institute of Veterinary Medicine andAnimal Sciences, Department of Food Hygiene, Kreutzwaldi 58A, Tartu, Estonia, 51014; e-mail: mati.roasto@emu.ee
²Latvia University of Agriculture, Faculty of Veterinary Medicine, Departmentof Food and Environmental Hygiene, K. Helmana iela 8, Jelgava, Latvia, LV–3004; e-mail: ch@no.lv
³University of Helsinki, Faculty of Veterinary Medicine, Department of FoodHygiene and Environmental Health, P.O. Box 66, FI-00014, Finland; e-mail: kristi.praakle@helsinki.fi
⁴Estonian State Veterinary and Food Laboratory, Kreutzwaldi 30, Tartu, Estonia,51006; e-mail: toomas.kramarenko@vetlab.ee

Abstract:

The present study gives a review of the contamination and health risks related to Campylobacter spp. and L. monocytogenes in the Estonian and Latvian food supply. Campylobacteriosis and human listeriosis are important zoonotic diseases. Therefore, biosecurity measures at the farm level and Good Hygiene Practices at the industry level must be strictly followed. Further improvements in the state surveillance and food industry self-control systems are needed both in Estonia and Latvia.

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