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Tytuł:
Corrosion properties of 1.4512 ferritic and 1.4404 austenitic steels for the automotive industry
Autorzy:
Zatkalíková, Viera
Markovičová, Lenka
Wróbel-Knysak, Anna
Powiązania:
https://bibliotekanauki.pl/articles/88716.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
corrosion
ferritic stainless steel
austenitic stainless steel
cyclic potentiodynamic test
exposure test
stal ferrytyczna odporna na korozję
stal austenityczna
test potencjodynamiczny
test ekspozycji
Opis:
Exhaust systems are susceptible to in-service wear because of their exposition to the very aggressive corrosive environment. Various stainless steels grades (mostly ferritic and austenitic, but also martensitic and duplex) and protective coatings are currently used for exhaust system elements to increase their aestetics and corrosion resistance. This article focuses on evaluation and comparison of the common corrosion properties of two stainless steels with different microstructures (ferritic and austenitic) used for exhaust system components at the low ambient temperature (35 °C). An aggressive acidic corrosion solution for electrochemical cyclic potentiodynamic tests (ASTM G61) was chosen to simulate partly inner (condensate) and also external environment (reaction of exhaust gases with water, chlorides in solution after winter road maintenance). Exposure tests of the pitting corrosion resistance were performed according to ASTM G48 standard method.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 745-752
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local corrosion of AISI 304 stainless steel in acidic chloride solution
Autorzy:
Zatkalíková, Viera
Markovičová, Lenka
Hanusová, Patrícia
Powiązania:
https://bibliotekanauki.pl/articles/104041.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
austenitic stainless steel
pitting corrosion
exposure test
cyclic potentiodynamic test
direction of rolling
austenityczna stal nierdzewna
korozja wżerowa
próba narażenia
cykliczna próba potencjodynamiczna
kierunek walcowania
Opis:
AISI 304 austenitic stainless steel is recommended and used for various applications in industry, architecture and medicine. Presence of halides in environment evokes a possibility of the local corrosion which limits seriously exploitation of this material in aggressive conditions. The presented paper is focused on the pitting corrosion resistance (“as received” steel surface) in 1M chloride solution (pH=1.2) at a common (20 °C) and an elevated (50 °C) ambient temperatures. 24-hours exposure immersion test (ASTM G48) and cyclic potentiodynamic test (ASTM G61) are used as the independent test methods. The exposure immersion test is carried out with cross-rolled and longitudinally rolled specimens and the effect of direction of rolling on the resistance to pitting is studied.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 268-275
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion resistance of SiMo- and SiCu-types of nodular cast iron in NaCl solution
Autorzy:
Vaško, Alan
Zatkalíková, Viera
Kaňa, Václav
Powiązania:
https://bibliotekanauki.pl/articles/88510.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
nodular cast iron
corrosion
exposure immersion test
NaCl solution
żeliwo sferoidalne
korozja
roztwór NaCl
właściwości mechaniczne
właściwości zmęczeniowe
Opis:
Nodular cast irons are used in a wide range of industrial applications, especially in the automotive industry. SiMo-type of nodular cast iron is suitable for high-temperature applications, for example the exhaust manifolds of the combustion engines; SiCu-type of nodular cast iron is used in various components of tribotechnical units. These automotive components often work in a corrosive environment. Therefore, the aim of this paper is to compare the corrosion resistance of two types of the nodular cast irons (SiMo-type and SiCu-type). Corrosion resistance was determined by the exposure immersion test at ambient temperature. Specimens of both types of nodular cast iron were immersed in 3.5 % NaCl solution (to simulate sea water) and gradually removed from the solution after 1, 2, 4 and 8 weeks. Subsequently, the weight loss (g) and the average corrosion rate (g m-2 day-1) were calculated. Experimental results show that nodular cast iron alloyed by Si and Mo has higher corrosion resistance than the nodular cast iron alloyed with Si and Cu. Moreover, the mechanical properties (evaluated by tensile test, impact bending test and hardness test) and fatigue properties of both types of nodular cast iron has been compared in the paper.
Źródło:
System Safety : Human - Technical Facility - Environment; 2020, 2, 1; 191-198
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response to the letter to editors concerning “Validity of mesothelin in occupational medicine practice”
Autorzy:
Smolková, Petra
Nakládalová, Marie
Zapletalová, Jana
Powiązania:
https://bibliotekanauki.pl/articles/2168367.pdf
Data publikacji:
2016-11-18
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
malignant mesothelioma
mesothelin
asbestos
validity
occupational exposure
diagnostic test
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2016, 29, 6; 881-881
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validity of mesothelin in occupational medicine practice
Autorzy:
Smolková, Petra
Nakládalová, Marie
Zapletalová, Jana
Jakubec, Petr
Vildová, Helena
Kolek, Vítězslav
Petřek, Martin
Nakládal, Zdeněk
Powiązania:
https://bibliotekanauki.pl/articles/2177053.pdf
Data publikacji:
2015-11-25
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
occupational exposure
asbestos
malignant mesothelioma
mesothelin
diagnostic test
validity
Opis:
Objectives Malignant mesothelioma (MM) is the most serious asbestos-related disease. Its increasing incidence is alarming, suggesting the need for as early diagnosis as possible. This 4.5-year prospective longitudinal study aimed at assessing the benefit of measuring serum mesothelin as a marker for diagnosing malignant mesothelioma in individuals with previous occupational exposure to asbestos, as a part of their clinical follow-up care. Material and Methods The study comprised 309 participants (235 males, 74 females) with a mean age of 58.9 years (standard deviation (SD) = 9.8) and a mean duration of exposure to asbestos dust of 13.4 years (SD = 9.3). From 2009 to June 2013, all subjects were followed at a department of occupational medicine in Olomouc. Apart from the standard parts of medical examination (history, physical examination, simple chest radiographs and spirometry), the patients’ serum mesothelin levels were determined by the Mesomark immunoenzymatic diagnostic assay. Statistical analysis of the validity of serum mesothelin level measurement was carried out with respect to the diagnosis of MM. Results Among the participants, 16 (5.2%) individuals (14 males and 2 females) were diagnosed with malignant mesothelioma. Based on the detected mesothelin levels, their validity for prediction of malignant mesothelioma was calculated as follows: sensitivity – 0.75, specificity – 0.962, positive predictive value – 0.706, negative predictive value – 0.969, positive and negative likelihood ratios – 19.95 and 0.26, respectively, and diagnostic odds ratio – 76.8, at a 95% confidence interval. Conclusions The high specificity was identified indicating the low false positivity as well. In the case of detecting elevated soluble mesothelin-related peptides (SMRP) levels in formerly asbestos-exposed individuals, the possibility of the presence of MM should be included into the clinical consideration. The high negative predictive value denotes a lower probability of the presence of MM in patients with normal SMRP levels but due to the limiting lower sensitivity this possibility cannot be entirely excluded.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2016, 29, 3; 395-404
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validity of mesothelin in occupational medicine practice
Autorzy:
Taeger, Dirk
Gawrych, Katarzyna
Brüning, Thomas
Powiązania:
https://bibliotekanauki.pl/articles/2168366.pdf
Data publikacji:
2016-11-18
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
occupational exposure
asbestos
malignant mesothelioma
mesothelin
diagnostic test
validity
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2016, 29, 6; 879-880
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neurological and neurophysiological examinations of workers exposed to arsenic levels exceeding hygiene standards
Autorzy:
Sińczuk-Walczak, Halina
Janasik, Beata M.
Trzcinka-Ochocka, Małgorzata
Stanisławska, Magdalena
Szymczak, Maria
Hałatek, Tadeusz
Walusiak-Skorupa, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/2179016.pdf
Data publikacji:
2014-12-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
occupational exposure
arsenic speciation
nervous system
neuropathy
neurophysiological test
Opis:
Objectives: The assessment of the neurotoxic effect of arsenic (As) and its inorganic compounds is still the subject of interest due to a growing As application in a large array of technologies and the need to constantly verify the principles of prevention and technological parameters. The aim of this study was to determine the status of the nervous system (NS) in workers exposed to As at concentrations exceeding hygiene standards (Threshold Limit Values (TLV) – 10 μg/m³, Biological Exposure Index (BEI) – 35 μg/l) and to analyze the relationship between the NS functional state, species of As in urine and As levels in the workplace air. Material and Methods: The study group comprised 21 men (mean age: 47.43±7.59) employed in a copper smelting factory (mean duration of employment: 22.29±11.09). The control group comprised 16 men, matched by age and work shifts. Arsenic levels in the workplace air (As-A) ranged from 0.7 to 92.3 μg/m³; (M = 25.18±28.83). The concentration of total arsenic in urine (Astot-U) ranged from 17.35 to 434.68 μg/l (M = 86.82±86.6). Results: Syndrome of peripheral nervous system (PNS) was manifested by extremity fatigue (28.6%), extremity pain (33.3%) and paresthesia in the lower extremities (33.3%), as well as by neuropathy-type mini-symptoms (23.8%). Electroneurographic (ENeG) tests of peroneal nerves showed significantly decreased response amplitude with normal values of motor conduction velocity (MCV). Stimulation of sural nerves revealed a significantly slowed sensory conduction velocity (SCV) and decreased sensory potential amplitude. Neurophysiological parameters and the results of biological and environmental monitoring showed a relationship between $\text{As}^\text{tot}$, $\text{As}^\text{III}$ (trivalent arsenic), the sum of iAs ($\text{As}^\text{III}+\text{As}^\text{V}$ (pentavalent arsenic))+MMA (monomethylarsonic acid) concentration in urine and As levels in the air. Conclusions: The results of the study demonstrate that occupational exposure to inorganic arsenic levels exceeding hygiene standards (TLV, BEI) generates disorders typical of peripheral neuropathy.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 6; 1013-1025
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occupational exposure to antineoplastic drugs in hospital environments: potential risk associated with contact with cyclophosphamide- and ifosfamide-contaminated surfaces
Autorzy:
Mucci, Nicola
Dugheri, Stefano
Farioli†, Andrea
Garzaro, Giacomo
Rapisarda, Venerando
Campagna, Marcello
Bonari, Alessandro
Arcangeli, Giulio
Powiązania:
https://bibliotekanauki.pl/articles/2085717.pdf
Data publikacji:
2020-09-24
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
occupational exposure
cyclophosphamide
antineoplastic drugs
ifosfamide
wipe test
surface contamination
Opis:
BackgroundCyclophosphamide (CP) and ifosfamide (IP) contaminations have been detected in hospital environments. This study was conducted to determine if there was any contamination in the spaces (floors and door handles) between the hospital exit and the antineoplastic drugs (ADs) preparation and administration units. At the same time, the authors proposed a new automation of the analytical procedure to considerably decrease the time needed for sample preparation and analysis.Material and MethodsTo evaluate the ADs contamination of surfaces, 829 wipe tests were performed in a campaign involving 3 hospitals located in Italy. Sampling was performed using an innovative kit. The levels of ADs were measured in each wipe sample using liquid chromatography/triple quadrupole.ResultsOn-line solid-phase extraction guarantees the construction of a robust and reproducible analytical method. The CP and IP recoveries from stainless steel, polycarbonate and polyvinyl chloride ranged >80%, and the wipe holders and the automation tested ensured desorption efficiencies close to 100% for both the ADs. Of the 552 wipes taken on the spaces between the hospital exit and the preparation, administration and pharmacy warehouse units, 22 were greater than or equal to the limit of quantification, all adjacent to the administration units.ConclusionsThis study provides an insight into the exposure situation against ADs residues. In order to improve environmental monitoring programs, the authors propose to evaluate the ADs contamination also outside the preparation, administration and pharmacy warehouse units.
Źródło:
Medycyna Pracy; 2020, 71, 5; 519-529
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptation of a neurobehavioral test battery for Thai children
Autorzy:
Rohitrattana, J.
Siriwong, W.
Suittiwan, P.
Robson, M.G.
Strickland, P.O.
Rohlman, D.S.
Fiedler, N.
Powiązania:
https://bibliotekanauki.pl/articles/874385.pdf
Data publikacji:
2014
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
neurobehavioural test
Thailand
child
reliability
human development
neurotoxic substance
human exposure
neuropsychology
Opis:
Background. Exposure to neurotoxicants is a world wide problem with significant health implications for child development. In spite of higher neurotoxicant exposures, many developing countries do not have established neuropsychological instruments. Objective. This study evalauted the adaptation and reliability of a computer and examiner administered Behavioral Assessment and Research System (BARS) that includes tests of motor speed and dexterity, attention, memory, and visuospatial coordination for use in Thailand. Material and methods. To assess test-retest and alternate form reliability, BARS was administered to 24 healthy, 6-8 year old urban Thai children during two testing sessions two weeks apart. A comparison group of 29 healthy, rural Thai children of similar age and sex completed the BARS as part of another study and comprised a comparison group. Results. Test-retest reliabilities for tests without alternate forms ranged from 0.41 to 0.77, but reliabilities were lower for tests with alternate forms (0.11 to 0.83). Paired t-tests revealed few significant differences in group performance between test administrations. Performance of urban Thai participants was compared to 29 rural Thai participants of similar age and sex. Parental education was significantly greater for urban vs. rural participants, resulting in signficant differences in performance on tests of motor speed. Conclusions. This study supports the use of BARS for epidemiologic studies of neurotoxicants in Thailand, but highlights the sensitivity of these tests to differences in parental education and the need for improved alternate test forms.
Wprowadzenie. Narażenie na substancje neurotoksyczne jest problemem ogólnoświatowym mającym istotne konsekwencje zdrowotne dla rozwoju dzieci. Wiele państw rozwijających się nie przygotowało narzędzi do badań neuropsychologicznych, mimo występowania dużego narażenia na substancje o działaniu neurotoksycznym. Cel badań. W badaniach przeprowadzonych przez ankieterów z zastosowaniem komputerów oceniono przystosowanie i wiarygodność testu Behavioral Assessment and Research System (BARS), który obejmuje badanie szybkości i zręczności motorycznej, uwagi, pamięci i koordynacji wzrokowej w celu zastosowania w Tajlandii. Materiał i metody. W celu oceny wiarygodności testu BARS metodą test-retest i zapisu alternatywnego poddano badaniu 24 zdrowych dzieci tajlandzkich w wieku 6-8 lat zamieszkujących w mieście. Ponowne badania przeprowadzono w odstępie 2 tygodni. Grupę porównawczą stanowiło 29 zdrowych dzieci mieszkających na wsi. Wyniki. Wiarygodność poszczególnych skal badana metodą test-retest rozciągała się od 0,41 do 0,77. Wiarygodność była niższa w przypadku metody zapisu alternatywnego (0,11 do 0,83). Test t dla zmiennych połączonych wykazał nieliczne różnice pomiędzy wynikami grupy w dwóch badaniach. Porównanie wyników uzyskanych przez dzieci tajlandzkie mieszkające w miastach i na wsi wykazało wpływ wykształcenia rodziców, które było znacząco wyższe u tych pierwszych. Wnioski. Badania potwierdzają użyteczność testu BARS do badań epidemiologicznych substancji neurotoksycznych w Tajlandii, ale uwydatniły czułość testu na różnice w wykształceniu rodziców i potrzebą polepszenia zapisu alternatywnego testu.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2014, 65, 3
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular profile of sensitization in subjects with short occupational exposure to latex
Autorzy:
Lamberti, Monica
Buonanno, Rosaria
Ritonnaro, Chiara
Giovane, Giancarlo
Crispino, Vincenzo
Feola, Antonia
Medici, Nicola
Sannolo, Nicola
Di Carlo, Angelina
Di Domenico, Marina
Powiązania:
https://bibliotekanauki.pl/articles/2177165.pdf
Data publikacji:
2015-07-17
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
occupational exposure
ImmunoCAP
natural rubber latex
skin prick test
contact dermatitis
gloves
Opis:
Objectives We examined the prevalence of latex allergy in subjects with occupational exposure to latex allergens for less than 5 years, determining the disease spectrum in symptomatic workers. We identified the most frequent molecular allergens by Immuno- CAP (ICAP), correlating the findings with skin prick test (SPT) results. Material and Methods Seven hundred twenty-three healthcare students using latex gloves on a regular basis were invited to participate in a baseline questionnaire screening. An ICAP serum test was performed only when a possible latex allergy was indicated by the questionnaire. Results The total number of participants responding to the baseline survey was 619. Glove-related symptoms were indicated by 4% (N = 25) of the students. The most common symptom was contact dermatitis (N = 18, 72%). In 12 subjects, ICAP revealed a real sensitization to latex, with a recombinant latex allergen profile showing a high frequency for rHev b 6.01 specific immunoglobulin E (sIgE) (N = 9, 67%). In these individuals, skin symptoms were more prevalent than other types (88%). Conclusions The combined positivity for rHev b 6.01, rHev 8 and rHev b 5 determined by ICAP identified 92% of latex-allergic subjects with short-term exposure to latex.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 5; 841-848
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of subchronic exposure to atrazine on zebrafish (Danio rerio)
Autorzy:
Plhalova, L.
Blahova, J.
Mikulikova, I.
Stepanova, S.
Dolezelova, P.
Praskova, E.
Marsalek, P.
Skoric, M.
Pistekova, V.
Bedanova, I.
Svobodova, Z.
Powiązania:
https://bibliotekanauki.pl/articles/31107.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
subchronic exposure
atrazine
zebra fish
Danio rerio
growth test
histopathology
triazine
herbicide
Opis:
The aim of this study was to investigate the effects of subchronic exposure to atrazine on fish growth and the development of histopathological changes in selected organs (gill, kidney, liver) in Danio rerio. Juvenile growth tests were performed on D. rerio according to OECD method No. 215. For 28 days, fish at an initial age of 30 days were exposed to the environmental atrazine concentration commonly detected in Czech rivers (0.3 μg/L) and a range of sublethal concentrations of atrazine (3.0, 30.0 and 90.0 μg/L). The results showed decreasing growth rates and morphological changes in the liver (dystrophic lesions of hepatocytes) at 90.0 μg/L of atrazine. The environmental concentration of atrazine in Czech rivers did not have any effect on fish growth and development of histopathological changes in D. rerio. The value of NOEC was 30.0 μg/L and the value of LOEC was 90.0 μg/L.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical strategies for assessing occupational exposure to antineoplastic drugs in healthcare workplaces
Autorzy:
Dugheri, Stefano
Bonari, Alessandro
Pompilio, Ilenia
Boccalon, Pierpaolo
Tognoni, Daniela
Cecchi, Michele
Ughi, Massimo
Mucci, Nicola
Arcangeli, Giulio
Powiązania:
https://bibliotekanauki.pl/articles/2162575.pdf
Data publikacji:
2018-12-18
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
occupational exposure
LC-MS/MS
ICP-MS
urine
antineoplastic drugs
wipe test
Opis:
Background Cytotoxic antineoplastic drugs (ADs), widely used in treating cancer, are considered hazardous in the workplace and thus require safe handling practices. An analytical protocol for environmental and biological AD monitoring in the healthcare environment has been developed, since Europe lacks clear guidelines and regulations for cytostatic preparation and handling. Material and Methods Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used for measuring contemporaneously 20 multi-class cytostatic compounds and urinary α-fluoro-β-alanine, whereas platinum was detected by inductively coupled plasma mass spectrometry (ICP-MS). Sampling procedures and analytical conditions were optimized and the assays were validated. Environmental AD monitoring data, collected in 2009–2017, for a total of 3749 wipe tests and 57 720 determinations, was evaluated. Results The proportion of positive samples gradually decreased from 11.7% in 2010 to 1% in 2017, however, 2266 determinations were positive. No urine sample had detectable concentrations of any of the 4 drugs considered (0/398 samples). Conclusions These improvements are so large that the key role played by the new, more stringent rules for preparing and administering ADs is evident. Hence, the analytical method involving multi-element determinations allows for a more thorough and complete investigation into the AD contamination of work environments. Med Pr 2018;69(6):589–604
Źródło:
Medycyna Pracy; 2018, 69, 6; 589-604
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance of Different Types of Hearing Protectors Undergoing High-Level Impulse Noise
Autorzy:
Buck, K.
Powiązania:
https://bibliotekanauki.pl/articles/90783.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
hearing protector
impulse noise exposure
test procedure
damage risk criteria
insertion loss measurement
artificial head
acoustic test fixture
Opis:
The paper describes the problems that may occur when hearing protectors, usually designed for industrial noise environments, are used for high-level impulse (weapon) noise. The military impulse noise environment is described, as are the different types of passive and active hearing protectors and the measurement procedures. The different mechanisms that may alter the effectiveness of the hearing protectors as well as their global efficiency when submitted to high-level impulse noise are presented. The paper also discusses how the performance values accessible to the user may be used in different damage risk criteria for continuous and impulse noise.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 2; 227-240
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The usage of a thermoclimatic chamber for technoclimatic tests of special vehicles and mobile machines
Autorzy:
Kucybała, P.
Gawlik, A.
Pobędza, J.
Walczak, P.
Powiązania:
https://bibliotekanauki.pl/articles/244297.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
environmental
climatic exposure
extreme climatic conditions
technoclimatic research
thermoclimatic chamber
accredited test procedure
Opis:
Constantly increasing technical and operational demands are set for modern manned and unmanned special vehicles, all − terrain vehicles, and mobile machines. Their producers must comply with very restrictive standards, strict legal regulations, and high customer requirements. They concern not only functionality and efficiency of described objects, but also resistance to the impact of environmental and climatic exposure. Vehicles and mobile machines must be adapted to work in different climatic conditions such as low and high temperature, variable humidity, wind, dustiness, rainfall, variable atmospheric pressure, solar radiation. Verification of the correctness of operation of all these systems installed in machines, vehicles and engineering units requires experimental research in specified and stable climatic conditions. These special conditions can only be implemented in a thermoclimatic chamber. Thanks to these researches, it is possible to confirm the effectiveness of solutions that allow machines to work in extreme climatic conditions, as well as to detect a number of defects and imperfections of the structure, unpredictable at the design stage. The article describes the research procedure certified by Polish Centre for Accreditation and discusses examples of technoclimatic research carried out recently in the thermoclimatic chamber of Laboratory of Technoclimatic Research and Heavy Duty Machines of Cracow University of Technology.
Źródło:
Journal of KONES; 2018, 25, 2; 199-206
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on tick-borne rickettsiae in eastern Poland. II. Serological response of occupationally exposed populations
Autorzy:
Zajac, V.
Wojcik-Fatla, A.
Cisak, E.
Sroka, J.
Sawczyn, A.
Dutkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/51448.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Tematy:
tick
Rickettsia
Polska
serological response
occupational exposure
population
serology
ELISA test
forestry worker
agricultural worker
Opis:
A group of 150 persons living in the Lublin province of eastern Poland and occupationally exposed to tick bite were examined by the immunoenzymatic ELISA test for the presence of antibodies against tick-borne Spotted Fever Group (SFG) rickettsiae. The group consisted of 75 forestry workers employed in 3 forest inspectorates and 75 agricultural workers living in 2 villages. As a control group, 43 urban dwellers living in the city of Lublin and not occupationally exposed to tick bite were examined. Among 150 persons occupationally exposed to tick bite, the presence of antibodies against SFG rickettsiae was found in 54 (36.0% of the total). In the control group, the frequency of positive findings was only 4.7%, being significantly smaller compared to the exposed group (p=0.0001). Within the exposed group, the percentage of positive results in forestry workers (50.7%) was greater than in agricultural workers (21.3%); the difference was statistically significant (p=0.0002). Also within this group, the frequency of positive findings in males(46.5%) was significantly greater than in females (21.9%) (p=0.0029). In the exposed group, the positive results tended to increase with the age of the examined persons. However, a significant relationship between age and positive findings was found only in forestry workers (c2=14.207, p=0.00264), but not in agricultural workers and total exposed workers. The frequencies of positive results in forestry workers varied significantly depending on place of work (c2=11.271, p=0.00357). Similarly, the difference between the positive reactions in agricultural workers living in 2 villages proved to be significant (34.2% vs. 8.1%; p=0.0074). The obtained results indicate that people occupationally exposed to tick bite and living in the area of eastern Poland where over half of Dermacentor reticulatus ticks harbour SFG rickettsiae, are under significantly increased risk of infection with these rickettsiae.
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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