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Methodology of removing dust particles from the surface of paper, collagen materials and textiles using the TEA CO2 laser
Mašková, Ludmila ; Jandová, Věra ; Vávrová, Petra ; Součková, Magda ; Neoralová, Jitka ; Novotná, Dana ; Fajgar, Radek ; Smolík, Jiří ; Křížová, Tereza ; Kocová, Kateřina
Cílem této metodiky bylo vytvořit soubor postupů a doporučení pro čištění knihovních materiálů, s jejichž využitím bude možné odstranit prachové částice z jejich povrchu pomocí infračerveného TEA CO2 laseru. Základním požadavkem je efektivní odstranění povrchového znečištění bez poškození ošetřovaného materiálu. Výsledkem je účinná a bezpečná alternativa ke stávajícím metodám čištění.
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Laboratory Study of Field Ion Emission from Dust Grain
Jeřáb, Martin
Title: Laboratory study of field ion emission from dust grains Author: Martin Jeřáb Department: Department of Surface and Plasma Science Supervisor: Prof. RNDr. Jana Šafránková, DrSc., KFPP Abstract: Dust particles are common objects in space environment. As a dust particles, we call objects with typical sizes of several atoms up to approximately 100 µm. However, a total mass of dust particles is only about 1% of total mass of our galaxy, the presence of dust particles significantly affects environment. The most interesting is dynamics of dust particles and attached dust charging processes. The presented thesis consists of two main parts. The first part deals with the experimental study of field ion emission. Our measurements have been performed using gold and carbon spherical dust grains. It has been found that during the charging of dust particle using ion gun are the primary ions implanted under the surface of the dust particle from where they are release in the form of neutral gas. This releasing of implanted ions affects field ion emission for several hours. The second part of the thesis describes a development of new experimental apparatus determined to the study of photoemission dust charging and con- sequently to the "true" field ion emission study. Keywords: dust, dusty plasmas, charging properties, field...
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Influence of dust particles on sliding contact
Píšala, Jan ; Janda, Marcel (referee) ; Veselka, František (advisor)
Master's thesis "effect of dust particles on sliding electrical contact" summarizes the sliding contact theory and praxe in rotating electrical machines. The principle of brush machines is described and the working environments are defined. The individual components of the sliding contact and reasons of their degradation are described in detail. Emphasis is placed on the influence of foreign particles, which can be assessed in practice by the method of dust particles. Furthermore, these theoretical knowledge was used in the practical assessment of the technical condition of various machines, as well as the called method. One set of brushes for the traction motor of the locomotive T47.0 was also experimentally innovated.
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Dust separators for small power boilers
Szweda, Martin ; Baláš, Marek (referee) ; Milčák, Pavel (advisor)
This thesis is divided into two parts. The first part of this thesis contains research on pollutants, separators and its legislation, while this part is focused on dust particles and their separation behavior. This is followed by a search on the different types of separators that can be used for small power boilers. The second part is followed by an experimental part, where the practical efficiency of the given separator is verified and then the measured values are compared and the result is evaluated. The results are used to determine whether the separator used is suitable for the separation of biomass for low-power boilers.
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Porovnání koncentrace emisí tuhých znečišťujících látek z rozdílných technologií velkochovu drůbeže
FARA, Radek
Topic of this thesis is comparsion of emission concetration of solid pollutants in intensive poultry farming with different technologies. Measurement was done in cage system and two alternative poultry housing systems in company International poultry testing based in Ústrašice. For measurement of dust particles was used measurement device DUSTTRAK II 8530, own measurement has been done continuously for 24 hours with record every 3s. Dustiness was tracked in size fraction PM10. This dust particles can negatively influence health of employees and reared poultry. By measuring and following evaluation was found, that lowest value of dust particles was achieved in cage housing system. Considering health protection of employees and requirements for poultry wellfare is necessary keep dustiness of stable enviroment on lowest level.
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Differences of duck, goose and eider feather from the perspective of a laborant technician
TOMÁŠKOVÁ, Anna
My bachelor thesis deals with the difference between goose, duck and eider feather. The main focus is aimed on laboratory testing; therefore no survey was carried out. The research was performed at the company Kamýk Daunen s.r.o., based in Kamýk nad Vltavou. Kamyk Daunen deals with the processing of goose and duck feather for production of feather and down filled products, duvets, pillows and mattress toppers in particular. The theoretical part of this thesis is a study of the following duck and goose species and their down and feather: Peking duck, Czech goose, Snow goose and the Common eider, and the impact of the specific feather and down of these species on human. As well as the production of feather in general. In the practical part we perform laboratory measurements of fat and oil content, humidity, oxidation number, fill power, turbidity and pH when goose, duck and eider feather with different down content are compared. The aim of my bachelor thesis is to write a specialized research on a given topic, summarize notes about the production and acquisition of feather, and to pursue laboratory methods that are applicable in this case. The main aim of the thesis is to discover, which type of feather is most suitable for quality daily sleep. As indicated before, there are several different kinds of feather that are used as a filling material for feather filled products. We have examined the difference between goose, duck and eider feather. As for the goose feather we had used feather from a goose of Czech goose and Snow goose breeds. For duck feather we have opted for the Peking duck and the eider was the Common eider.
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Vliv emisí prachových částic a pachových látek z intenzivního výkrmu drůbeže na životní prostředí v okolí chovu.
COUFAL, Marek
This thesis is about evaluation of the influence of odorus substances and dust particles from intensive poultry farming to the environment. Measurement was done on a family farm near the forest in spring and autumn in 2017. The fattening of broilers is carried out there in four fattening halls with a total of 103,000 units. Poultry is fattened on the farm for 238 days during the whole calendar year after 7 batches. Sampling was carried out from one of these halls. The values obtained are ranged from 59 / m3 to 215 / m3 for odorous substances and particulate matter PM10 ranging from 0.061 mg to 0.0765 mg. PM2.5 dust particles showed values of 0.042 mg after 0.1535 mg. Evaluation of odorous substances was performed by the method of dynamic olfactometry according to the standard ČSN EN 13 725. The values obtained were ranged from 59 / m3 to 215 / m3. The range of production specific emissions was between 0.013828 and 0.298366 ( / / s). The PM10 particle emission production rate between 0,0000179 and 0,0001094 (mg / pc / year) and PM2,5 from 0,0000642 to 0,0001672 (mg / pc / year) was determined using the particulate measurement methodology. These data were compared with the relevant air pollution limits according to Annex No. 1 to the Act on Air Protection No.201 / 2012 Coll., Immission background in the locality and a dispersion study was prepared for them.
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Koncentrace tuhé znečišťující látky uvnitř stáje velkochovu drůbeže v závislosti na stáří drůbeže
DVOŘÁK, David
This thesis deals with the issue of air pollution, emission of solid substance in the large-scale poultry. Compares the level of surface contamination inside the breeding facility, depending on the age of the poultry. The measurements were carried out in accordance with the applicable methodology for the evaluation and the determination of the concentration of dust particles PM10 in the selected large-scale poultry. Measurement was carried out in a large-scale broiler Farma u lesa in Sudoměřice u Bechyně. The aim of this work was to obtain a measurement and then evaluate the data obtained. The measurements were carried out in two rounds to measure two size fractions of solid pollutants. The DUST TRAK 8530, borrowed by the faculty, was used to measure the solid dust particles in bulge. Further, the thesis also describes description and measurement methodology with this device.
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