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    Tytuł:
    Ocena właściwości ochronnych środków ochrony indywidualnej w warunkach użytkowania oraz reprezentatywności metod badań
    The assessment of the real protective properties of personal protective equipment and
    Autorzy:
    Mayer, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/180776.pdf
    Data publikacji:
    2007
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    środki ochrony indywidualnej
    ochrona słuchu
    hałas
    personal protective equipment
    hearing protection
    noise
    Opis:
    Ocena laboratoryjna właściwości ochronnych i użytkowych środków ochrony indywidualnej w wielu przypadkach pozostaje raczej teoretyczna. Znormalizowane metody badań, przyjęte i wykorzystane jako podstawa oceny, bardzo często mają charakter empiryczny i uproszczony. Często był to jedyny sposób umożliwiający przeprowadzenie powtarzalnych, odtwarzalnych i niepotrzebnie kosztownych badań. Pomimo to, często dają one zawyżone wyniki, Środki ochrony indywidualnej, które uzyskały pozytywne wyniki wszystkich badań laboratoryjnych, mogą w rzeczywistych warunkach użytkowania wydawać się mniej skuteczne i wygodne niż oczekiwano. Aby ograniczyć te rozbieżności, należy starać się skorelować wyniki uzyskane w laboratorium z wynikami uzyskanymi w warunkach użytkowania. Różnice powstają głównie wtedy, kiedy właściwości środków ochrony indywidualnej są ściśle powiązane z morfologicznymi i psychofizjologicznymi cechami przyszłych użytkowników oraz bardzo zróżnicowanym charakterem zadań, jakie mogą wykonywać. W artykule omówiono wyniki badań skuteczności środków ochrony indywidualnej słuchu, tzw. ochronników słuchu. Rezultatem tych badań jest zalecenie udoskonalenia procedury badania lub wprowadzenia współczynników korygujących wyniki podawane przez producentów.
    The assessment in a laboratory of the efficiency and comfort of PPE remains, in many cases, rather theoretical. The standardized test methods adopted and used as a basis for this assessment are very often empirical and simplistic. This has often been the only way for standardizers to get repeatable, reproducible and unnecessarily expensive tests. Nevertheless they often give overestimated results; PPE having satisfied all the tests in a laboratory may sometimes appear in real conditions of use less efficient and comfortable than expected. To reduce these discrepancies as much as possible, it is always advisable to try to correlate the results obtained in a laboratory with the reality of work places by conducting assessment in a real situation. These differences mainly exist when real PPE performance is closely linked to the morphological and psycho-physiological characteristics of future users and to the nature of the very diversified tasks they may have to perform. The article discusses the results of studies of the efficiency of hearing protectors. These studies resulted in recommending a substantial improvement of the test procedures or an introduction of significant correction factors to the performance claimed by the manufacturers.
    Źródło:
    Bezpieczeństwo Pracy : nauka i praktyka; 2007, 5; 4-7
    0137-7043
    Pojawia się w:
    Bezpieczeństwo Pracy : nauka i praktyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the Protection Efficiency and Comfort of Personal Protective Equipment in Real Conditions of Use
    Autorzy:
    Mayer, A.
    Korhonen, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/90594.pdf
    Data publikacji:
    1999
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    personal protective equipment
    efficiency
    ergonomics
    standards
    ergonomia
    sprzęt ochrony osobistej
    wydajność
    standardy
    Opis:
    The lack of scientific and technical knowledge in certain complex fields, together with schedule constraints, have lead to adopting in EN standards insufficiently validated tests, relying sometimes on an empirical approach. Thus, even personal protective equipment (PPE) with positive results in tests required by the standards can nevertheless prove to be unsatisfactory when used at work. Several research projects have already been carried out on equipment, fail arresting systems, protective clothing, and gloves by several health and safety institutes in Europe. The results would suggest practical solutions to improve the representative of several European Committee for Standardization (CEN) test methods and to focus more on informing and training workers on the manner of wearing PPE, in particular respiratory protective equipment or hearing protectors.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 1999, 5, 3; 347-360
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Green propulsion research at TNO the Netherlands
    Badania nad ekonapędem w TNO w Holandii
    Autorzy:
    Mayer, A.
    Wieling, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/36391787.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    green propulsion
    monopropellant
    bipropellant
    hydrogen peroxide
    nitromethane
    napęd ekologiczny
    nadtlenek wodoru
    nitrometan
    Opis:
    This paper describes the recent theoretical and experimental research by the Netherlands Organisation for Applied Scientific Research (TNO) into green replacements for hydrazine, hydrazine derivatives and nitrogen tetroxide, as propellants for inspace propulsion. The goal of the study was to identify propellants that are capable of outperforming the current propellants for space propulsion and are significantly less hazardous for humans and the environment. Two types of propellants were investigated, being monopropellants and bipropellants. The first section of the paper discusses the propellant selection. Nitromethane was found to be the most promising monopropellant. As bipropellant, a combination of hydrogen peroxide (HP) and ethanol was selected, where the ethanol is rendered hypergolic with hydrogen peroxide. The second part of the paper describes the experimental verification of these propellants by means of engine testing. Initiation of the decomposition of nitromethane was found to be problematic, hypergolic ignition of the hydrogen peroxide and ethanol bipropellant however was successfully demonstrated.
    W niniejszym artykule opisano wyniki najnowszych teoretycznych i eksperymentalnych badań Holenderskiej Organizacji Stosowanych Badań Naukowych (TNO) na rzecz ekologicznych zamienników hydrazyny, pochodnych hydrazyny i tetratlenku diazotu, jako materiałów do napędu rakietowego. Celem badań była identyfikacja materiałów napędowych, mogących osiągnąć lepsze wyniki niż obecne paliwa rakietowe i będąc jednocześnie mniej niebezpiecznymi dla ludzi i środowiska. Zadano dwa typy materiałów pędnych, tak zwane „monopropellant” i „bipropellant”. W pierwszej części artykułu omówiono wybór materiału pędnego. Nitrometan okazał się najbardziej obiecującym materiałem typu „monopropellant”. Jako „bipropellant” wybrano połączenie nadtlenku wodoru (HP) i etanolu, w którym etanol zmodyfikowano hypergolicznie nadtlenkiem wodoru. W drugiej część artykułu opisano eksperymentalną weryfikację zastosowania materiałów napędowych za pomocą testów silnika. Pomimo początkowych problemów z rozkładem nitrometanu, udowodniono hipergoliczny zapłon nadtlenku wodoru i zademonstrowano „bipropellant” etanolowy.
    Źródło:
    Transactions on Aerospace Research; 2018, 4 (253); 5-32
    0509-6669
    2545-2835
    Pojawia się w:
    Transactions on Aerospace Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of fuel tracing on nanoparticles from a Diesel engine
    Autorzy:
    Czerwinski, J.
    Mayer, A.
    Wischer, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/134232.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel
    emissions
    nanoparticles
    size distribution
    composition of particles
    silnik spalinowy
    emisja
    nanocząstki
    rozkład wielkości
    skład cząstek
    Opis:
    Nanoparticles from a HD-Diesel engine and their composition were investigated in the present paper. Three variants of fuel additivities were applied to allow the balances of certain tracer-substances after the tests: 2% of additives-free lube oil; 2% of market lube oil with additive package and Fe-based regeneration additive (FBC) with 40 ppm Fe. The analysed SMPS particle size distributions indicated that by blending of the market lube oil to the fuel the combined effects of metals or metal oxides from the additive packages and of the heavy HC’s from the lube oil matrix contribute the most to the increase of nuclei mode. From the masses of Fe, Zn and Ca, which were introduced with the fuel, only parts were found as integral masses at all ELPI-stages – Fe 43.5%, Zn 36.6%, Ca 65.5%. The majority of mass of some metals, or metal oxides emissions on ELPI-stages (up to 80%) is in the size ranges below 100 nm.
    Źródło:
    Combustion Engines; 2015, 54, 1; 3-10
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanoparticle research on four gasoline cars
    Autorzy:
    Czerwinski, J.
    Comte, P.
    Mayer, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/247977.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    gasoline cars
    combustion engine
    nanoparticles measurements (NP)
    NP fluctuation
    Opis:
    The invisible nanoparticles (NP) from combustion processes penetrate easily into the human body through the respiratory and olfactory ways and carry numerous harmful health effects potentials. NP count concentrations are limited in EU for Diesel passenger cars since 2013 and for gasoline cars with direct injection (GDI) since 2014. The limit for GDI was temporary extended to 6 x 1012 #/km. Nuclei of metals as well as organics are suspected to significantly contribute especially to the ultrafine particle size fractions, and thus to the particle number concentration. In the present paper, some results of investigations of nanoparticles from four gasoline cars – an older one with MPI and three never with DI – are represented. The measurements were performed at vehicle tailpipe and in CVS-tunnel. The results show that the older vehicle with MPI emits high particle count concentrations. The size distributions of this vehicle are decisively bimodal with high numbers in nuclei mode. The emissions of the newer vehicles with DI show sometimes no typical uniform shape of particle size distributions and are at lower level, than for the older vehicle. There is no visible nuclei mode and the ultrafine particle concentrations below 10 nm are insignificant. Some of the newer, low-emitting vehicles show at constant speed operation a periodical fluctuation of the NPemissions. Increased NP-emissions at cold start were confirmed.
    Źródło:
    Journal of KONES; 2014, 21, 1; 49-57
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of nanoparticle emissions of two gasoline cars MPI & DI at stationary part load operation
    Emisja nanocząstek z dwóch pojazdów wyposażonych w silniki ZI – MPI i DI w warunkach stacjonarnych przy częściowym obciążeniu
    Autorzy:
    Czerwiński, J.
    Comte, P.
    Keller, A.
    Mayer, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/133666.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    nanoparticles
    emission standards
    ambient air limits
    health benefits
    nanocząstki
    limity emisji
    normy jakości powietrza
    korzyści zdrowotne
    Opis:
    Starting from Euro 6 not only for diesel but also for gasoline vehicles, with direct injection technology (GDI) a solid particle number emissions limit of 6 × 1011#/km becomes effective. The limit was temporary extended for GDI to 6 x 1012#/km. Nuclei of metals as well as organics are suspected to significantly contribute especially to the ultrafine particle size fractions, and thus to the particle number concentration. In the project GasOMeP (Gasoline Organic & Metal Particulates) metal-nanoparticles (including sub 20 nm) from gasoline cars are investigated for different engine technologies. In the present paper some results of basic investigations of nanoparticles from two gasoline cars – an older one with MPI and a never one with DI – are represented. The measurements were performed at vehicle tailpipe, with varying sampling conditions and with different SMPS-systems, which enabled the mobility scanning in different size ranges. The results show that the older vehicle with MPI emits high particle count concentrations. The size distributions are decisively bimodal with high numbers in nuclei mode. In this case, the particle counting below 10 nm yields important information. The emissions of the newer vehicle with DI show no typical uniform shape of particle size distributions and are at lower level, than for the older vehicle. There is no visible nuclei mode and the ultrafine particle concentrations below 10 nm are insignificant. A sampling with a strongly increased primary dilution has a clear influence on the indicated (higher) particle concentrations.
    Począwszy od normy Euro 6 wprowadzone zostanie ograniczenie emisji cząstek stałych do 6 × 1011#/km nie tylko dla pojazdów wyposażonych w silniki ZS, ale także dla pojazdów z silnikami ZI z bezpośrednim wtryskiem paliwa (GDI). Dopuszczalna liczba cząstek stałych emitowanych przez pojazdy wyposażone w silniki GDI była tymczasowo zwiększona do 6 × 1012#/km. Cząstki metali, jak również substancje organiczne prawdopodobnie są powodem emisji bardzo małych cząstek stałych, przyczyniając się do zwiększenia liczby emitowanych cząstek stałych. W projekcie GasOMeP (cząstki organiczne i metalowe z silników benzynowych) badana jest emisja nanocząstek metali (również o średnicy < 20 nm) z samochodów wyposażonych w silniki benzynowe różnych generacji. W artykule przedstawiono wyniki badań emisji nanocząstek z dwóch samochodów wyposażonych w silniki benzynowe – starszy z wtryskiem MPI i nowszy z wtryskiem DI. Spaliny pobierano z układu wylotowego pojazdu przy różnych warunkach pomiarowych i z wykorzystaniem urządzeń do pomiaru emisji cząstek stałych o różnych zakresach pomiarowych. Wyniki badań wskazują, że stężenie cząstek stałych w spalinach starszego pojazdu z wtryskiem MPI jest duże. Rozkłady wielkości mają charakter bimodalny z dużymi wartościami w fazie nukleacji. Wtedy istotny jest pomiar liczby cząstek stałych o średnicy mniejszej niż 10 nm. Emisja z pojazdu z wtryskiem typu DI nie wykazuje typowego jednolitego kształtu rozkładu wymiarowego, również liczba cząstek stałych jest mniejsza niż z pojazdu starszego. Nie zauważono znaczącej emisji cząstek w fazie nukleacji, a stężenia cząstek najmniejszych o średnicy poniżej 10 nm są nieznaczne. Pobór próbki spalin przy zastosowaniu dużego współczynnika rozcieńczenia ma zauważalny wpływ na zwiększenie stężenia cząstek stałych.
    Źródło:
    Combustion Engines; 2014, 53, 3; 3-11
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes of the 2-stroke aerosol in the exhaust sampling system
    Autorzy:
    Czerwinski, J.
    Comte, P.
    Mayer, A.
    Reutimann, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/247914.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    scooters
    two-stroke direct injection
    carburettor
    2-stroke aerosol
    nanoparticulate emissions
    Opis:
    Nanoparticle emissions of two 2-stroke scooters were investigated along the exhaust- and CVS-system (Constant Volume Sampling) with closed and with open line (cone). Due to their technology, the scooters produce different kind of aerosol (state of oxidation & SOF-content) and in addition to that they were operated with and without oxidation catalyst. The scooters represent a modern technology with direct injection TSDI* ) (two stroke direct injection) and with carburettor. The tests were performed at two constant speeds of the vehicles (20 km/h & 40 km/h) according to the measuring procedures, which were established in the previous research in the Swiss Scooter Network. The nanoparticulate emissions were measured by means of SMPS (CPC) and NanoMet (abbreviations see at the end of this paper). The most important results are: - the changes of the PSD's of the aerosol along the exhaust and CVS-system are connected to the average gas temperature and PC-concentration, which result after the different dilution steps and cooling down in the connecting pipe, - in the "open" variant of exhaust gas extraction there is a dilution step with unfiltered ambient air directly after tailpipe. This causes a stop of agglomeration, reduction of diffusion loses and increased background NPconcentration. There is also lower post oxidation of CO & HC. In some cases spontaneous condensates due to the temperature drop are supposed, - with the "closed" variant there is a stronger reduction of SMPS PC's along the gas way, than with the open variant. This is to explain with the higher temperatures and concentrations in the closed system, which enable more intense thermophoresis - and diffusion losses, - the NP-concentrations measured with "open" variant are always higher, - most intense oxidation is observed with Peugeot Carb: due to the SAS, rich tuning and a relatively high temperature level there are oxidation effects already without catalyst (temp. approx. 350 centigrade). With catalyst the temperature is in the range of 400centigrade and the oxidation is so intense, that the particles are nearly eliminated. The type of sampling: "open", or "closed" as well as the sampling position in the exhaust installation have significant influence on the measured nanoparticles emission results.
    Źródło:
    Journal of KONES; 2012, 19, 2; 109-119
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PN-emissions with increased lube oil consumption of GDI car with/without GPF
    Autorzy:
    Czerwinski, J.
    Comte, P.
    Güdel, M.
    Kurzwart, M.
    Mayer, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/245468.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    PN-emissions
    road transport
    combustion engine
    air pollution
    environmental protection
    normy emisji
    transport drogowy
    silnik spalinowy
    zanieczyszczenie powietrza
    ochrona środowiska
    Opis:
    The particle number (PN) emissions are increasingly considered in the progressing exhaust gas legislation for onand off- road vehicles. The invisible nanoparticles penetrate like a gas into the living organisms and cause several health hazards. The present paper shows how the PN- and gaseous emissions of a modern GDI (Abbreviations see at the end of this paper) vehicle change, when there is an in-creased lube oil consumption. What are the potentials of a gasoline particle filter to reduce the emissions? The lube oil consumption was simulated by mixing 2% vol. lube oil into the fuel. A non-coated GPF was mounted at tailpipe, so only the filtration effects were indicated. The tests were performed at transient (WLTC) and at stationary (SSC) operating conditions. It has been shown that the increased lube oil consumption significantly increases the PN-emissions and the applied high quality GPF eliminates these emissions very efficiently.
    Źródło:
    Journal of KONES; 2017, 24, 1; 102-112
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of air quality in vehicle cabins by nanoparticle filtration
    Autorzy:
    Burtscher, H.
    Mayer, A.
    Loretz, S.
    Keller, A.
    Kasper, M.
    Czerwinski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/247534.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    vehicle
    ecology
    filtration system
    nanoparticles
    Opis:
    A filter system is presented which allows the reduction of the concentration of ultrafine particles in vehicle cabins to very low levels. The original ventilation system is switched to the recirculation mode and all cabin intake air is supplied via a retrofitted filter system. Tests with a variety of different vehicles (from passenger cars to coaches) show the efficiency of the system. Filters incorporated in present ventilation systems remove large particles, for example pollen, but usually are inefficient for removing very small particles. This is demonstrated by Fig. l, where the particle number concentration outside and inside a car is plotted during a journey near Zurich. It is obvious that the concentrations inside and outside are more or less identical. All windows were closed during this measurement. Tests with a number ofdifferent all cars showed similar results. The filters included in today 's ventilation systems usually cannot remove nanoparticles, and so vehicle cabin indoor and outdoor nanoparticle concentrations are more or less identical. The nanocleaner, consisting of a very effident filter and a high performance blower, allows reduction of the particle concentration in the cabin from several hundreds of thousands or millions per cc. to a few thousand per cc., equivalent to remote woodland, the total exposed dose being reduced by some two orders of magnitude.
    Źródło:
    Journal of KONES; 2010, 17, 4; 79-88
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Air quality filtration in vehicle cabins
    Autorzy:
    Burtscher, H.
    Mayer, A.
    Loretz, S.
    Keller, A.
    Kasper, M.
    Czerwinski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/242450.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    transport
    vehicles
    nanoparticle
    cabine filtration
    Opis:
    A filter system is presented which allows the reduction of the concentration of ultrafine particles in vehicle cabins to very low levels. The original ventilation system is switched to the recirculation mode and all cabin intake air is supplied via a retro fitted filter system. Tests with a variety of different vehicles (from passenger cars to coaches) show the efficiency of the system. Number concentration of particles inside and outside a car, the nanoparticle filtration system, fllter-efficiency: transmission for the new filter and for the filter loaded to apressure drop of 2.9 mbar, setup of the filter with integrated prefilter for course particles and blower, prototype of the filter system, main filter, prefilter and blower are included the system operated by an external control box, containing the drive electronics for the blower and displays for filter pressure drop and time meter, filter pressure drop as function of operating time in a highly polluted road tunnel, a possible solution to mount the filter system, particle concentration inside and outside the car (passenger car), concentration drops to very low levels, particle concentration inside and outside a passenger car with the filter turned on, two nanocleaner filter systems mounted in a school bus, filter system for buses installed in the luggage compartment are presented in the paper.
    Źródło:
    Journal of KONES; 2009, 16, 2; 59-69
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    NOX-reduction on HD-vehicles-low cost quality check
    Autorzy:
    Czerwinski, J.
    Zimmerli, Y.
    Mayer, A.
    Heeb, N.
    Berger, H.
    D‘Urbano, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/246300.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    Diesel particle filter
    regeneration of DPF
    non-legislated emissions
    selective catalytic reduction SCR
    NOx-reduction
    SCR-quality testing
    on vehicle testing
    Opis:
    The NOx reduction of recent HD-vehicle is performed mostly by means of the selective catalytic reduction SCR. There are some manufactures and some applications of SCR as retrofit systems (mostly for the low emission zones LEZ and in combination with a DPF). In charge of Swiss authorities AFHB investigated several SCR-systems, or (DPF+SCR)-systems on HD-vehicles and proposed a simplified quality test procedure of those systems. This procedure can especially be useful for the admission of retrofit systems but it can also be helpful for the quality check of OEM-systems. In the present paper the test procedures will be described and some examples of specific results will be presented. As general conclusions it can be stated: – the foundations for the quality verification procedures of SCR-systems are established, – the SCR-systems are not active at lower temperatures < 200°C, – SCR-testing on vehicle is a simple & low-cost tool for quality check, – the overall average NOx reduction rate depends on the operating profile of the vehicle – for low-load, for cold operation and for interrupted operation (HEV) there are lower NOx reduction efficiencies.
    Źródło:
    Journal of KONES; 2013, 20, 2; 61-68
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Particle filter test procedure and quality standard for diesel engines
    Autorzy:
    Mayer, A.
    Czerwinski, J.
    Kasper, M.
    Leutert, G.
    Heeb, N.
    Ulrich, A.
    Jaussi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/242255.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engines
    diesel engines
    particle filters
    quality air standards
    air pollution
    Opis:
    A new approach is needed to test particle filters for retrofitting Diesel engines. Considering the toxicity of the particles as also the physical and chemical attributes of particle filters, the optimal scheme is to test the components themselves independent of the deployment. That scheme ensures the highest effectiveness with least effort. It also enables evaluation of worst-case situations and assesses the hazards of secondary emissions. The Swiss standard SNR 277 205, which mandates the VERT test procedure, is a first step in that direction. Occupational health specialists have studied the toxicity of ultraflne particles for more than 100 years. Extremely toxic are the particles intruding into the lung. Larger particles, which are always naturally present, are intercepted in the upper respiratory paths. The body then expels these larger particles rapidly via the mucus and cilia. The new manmade particles less-than l mi m, however massively intrude into the fine pulmonary alveoli, which do not have the cleansing mechanism. The targeted efficiencies for evaluating modern filters are evident from the progress achieved. Many filters have filtration rates exceeding 99.9%, albeit the directives [4] only require 97%.
    Źródło:
    Journal of KONES; 2009, 16, 2; 305-314
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combined DPF+SCR systems for retrofitting in the VERT quality verification tests
    Autorzy:
    Czerwinski, J.
    Zimmerli, Y.
    Mayer, A.
    Bunge, R.
    Heeb, N.
    Lemaire, J.
    Jauss, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/248088.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    diesel emission reduction
    diesel particle filter
    SCR
    limited and unlimited emissions
    deNOx
    Opis:
    New Diesel exhaust gas aftertreatment systems, with DPF*) and deNOx (mostly SCR) inline application are very important step towards zero emission Diesel fleet. Solid quality standards of those quite complex systems are urgently necessary to enable decisions by several authorities. The Swiss Federal Office of the Environment BAFU and the Swiss Federal Roads Office ASTRA decided to support further activities of VERT to develop appropriate testing procedures and to define the quality criteria. The present report informs about the international network project VERT *) dePN (de-activation, de-contamination, disposal of particles & NOx), which was started in Nov. 2006 with the objective to introduce the SCR-, or (DPF+SCR)-systems in the VERT verification procedure. Examples of results with some investigated systems are given. The most important statements are: - the investigated combined aftertreatment systems (DPF+SCR) for dynamic engine application efficiently reduce the target emissions with deNOx-efficiency up to 92% (if operated in the right temperature window) and filtration efficiency based on particle count up to 100%, - the average NOx conversion rate at transient operation (ETC) depends strongly on the exhaust gas temperature profile and the resulting urea dosing control, - the NP filtration efficiency, which is verified at stationary engine operation is perfectly valid also at the transient operation. The present results will be confirmed in the further project activities with other systems and with different testing cycles. A special attention will be paid to the operational profiles, which are representative for low emissions zones LEZ.
    Źródło:
    Journal of KONES; 2008, 15, 3; 89-101
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vert particle filter test procedure and quality standard for new and in-use diesel engines
    Autorzy:
    Mayer, A.
    Czerwinski, J.
    Kasper, M.
    Leutert, G.
    Heeb, N. V.
    Ulrich, A.
    Jaussi, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/247808.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    internal combustion engines
    diesel engines
    ecology
    filters
    particulates
    Opis:
    A new approach is needed to test particle filters for retrofitting Diesel engines. Considering the toxicity of the particles as also the physical and chemical attributes of particle filters, the optimal scheme is to test the components themselves independent of the deployment. That scheme ensures the highest effectiveness with least effort. It also enables evaluation of worst-case situations and assesses the hazards of secondary emissions. The Swiss standard SNR 277 205, which mandates the VERT test procedure, is a first step in that direction. The solution is derived from the physics of the filter media. The filtration of fine particles essentially depends on the particle size and the space velocity. The attributes of the emitting engine are only insignificantly relevant. Hence the physics and chemistry of particle filters can be investigated independent of the engine and its deployment duty. This concept facilitates a very thorough investigation of the size-dependent filtration, aging susceptibility, secondary emissions and extreme situations. Filter systems, which pass this detailed test, perform equally well in every retrofit configuration. This filter test concept was implemented 1998 in the VERT project and is successful for assessing retrofltting [4]. VERT approved fllter systems are already deployed in the Low Emission Zones of Europe, North and South America.
    Źródło:
    Journal of KONES; 2010, 17, 4; 313-322
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of emissions of reactive substances NO2 and NH3 from passenger cars
    Autorzy:
    Czerwinski, J.
    Comte, P.
    Güdel, M.
    Lemaire, J.
    Mayer, A.
    Heeb, N.
    Berger, H.
    Reutimann, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/133799.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    exhaust emissions
    reactive substances
    NO2
    NH3
    emisje spalin
    substancje reaktywne
    Opis:
    Public concern and complaints regarding ambient air in zones of dense traffic pertains to two compounds of nitrogen, nitrogen dioxide (NO2) and ammonia (NH3); both are toxic and strongly irritant, such that legal limitations are under discussion. This paper contributes to measuring methods as already in part proposed by GRPE subgroup WLTP-DTP (Worldwide Light Duty Test Procedures – Diesel Test Procedures) for NO2. Despite legally lowered NOx emission levels, lumping both, NO2 and NO, levels of NO2 have risen in cities and agglomerations as a result of both, deployed catalytic exhaust after-treatment devices and low sulphur Diesel fuels. In present tests two different combinations of NO2 measuring methods as proposed by WLTP were checked on Diesel cars for practicability in handling and accuracy. These integral, indirect methods (NO2 = NOx – NO) have been found as useful tools for estimate of NO2 and with use of appropriate analyzers a satisfactory accuracy was attained. Furthermore, attention was brought to ammonia (NH3) emitted by gasoline engines with three way catalysts (TWC) which ought not to be ignored while on the other hand SCR systems for Diesel engines are strictly regulated. Emission levels of more recent TWC turned out to be mostly below 20 ppm NH3. Vehicle of older technology exhibited significantly higher levels, about 10 times more. As chemical reactions depend on pressure and temperature (= i.e. flow condition in CVS-tunnel) as well as concentrations, doubts need to be considered on accuracy of results based on chemical reactive substances. Nevertheless, clear tendencies regarding changes of concentrations of NO2 and NH3 along the path-way could not be observed.
    Źródło:
    Combustion Engines; 2016, 55, 3; 24-33
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Malaria chemoprophylaxis efficiency evaluation in patients of district outpatient department of tropical and parasitic diseases in Gdynia
    Autorzy:
    Kotlowski, A.
    Mayer, L.
    Myjak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/839374.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    malaria
    parasite
    parasitic disease
    tropical disease
    Gdynia
    Polska
    chemoprophylaxis
    health problem
    Tropics,The
    Źródło:
    Annals of Parasitology; 1998, 44, 3
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problemy związane z korekcją promienia końcówki pomiarowej podczas skaningowych pomiarów współrzędnościowych
    Difficulties with the corrected measured point determination in coordinate metrology
    Autorzy:
    Woźniak, A.
    Mayer, M.
    Cote, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/153572.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    Współrzędnościowa Maszyna Pomiarowa
    WMP
    sonda głowica skaningowa
    korekcja promienia końcówki
    Coordinate Measuring Machine
    CMM
    scanning probe
    probe radius compensation
    Opis:
    W artykule przedstawiono analizy teoretyczne i badania doświadczalne potwierdzające, że korekcja promienia końcówki pomiarowej może być istotnym źródłem błędów podczas saningowych pomiarów przeprowadzanych na maszynach współrzędnościowych. Przedstawiono wyniki pomiarów przykładowego elementu na maszynie Mitutoyo LEGEX 910 CMM wyposażonej w sondę skaningową MPP-300, ze wskazaniem mechanizmów złej korekcji promienia końcówki pomiarowej.
    Paper discusses an understanding for the compensation of the probe ball radius in a scanning process carried out by coordinate measuring machines (CMM). According to some initial trials of scanning measurement using the stylus tip radius correction built-in the CMM software, it was found, as will be shown in the paper, that the indigenous CMM software do not compensate the stylus tip radius well. As a result, the information about the real shape of the measured reatures can be distored. The difficulties with the corrected measured point determination will be demonstrate no the basis of tests were carried out on a Mitutoyo LEGEX 910 CMM equipped with a MPP-300 scanning probe.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 485-488
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Axis location and scale factors estimation for three-axis machines from periodic performance checks with laser distance measurements - risks and opportunities
    Autorzy:
    Nafi, A.
    Łoś, A.
    Mayer, J.R.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/99577.pdf
    Data publikacji:
    2010
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    CMM
    calibration
    performance
    diagnostic
    Opis:
    Users of coordinate measuring machine and large gantry machines need to ensure the volumetric performance of their machines in order to inspect, or machine, mechanical parts with precision. In the case of CMMs, the ASME B89.4.10360.2-2008 document imposes seven directions for a volumetric check. These directions offer some redundancy for axis location (out-of-squarenesses) and scale factor estimation. The paper looks at the opportunity of using the data for immediate machine correction and the risks involved. In particular, the fact of using test data for calibration and verification, the potential contamination from non-modelled motion errors and the representativity of the estimated parameters are considered. Experimental results obtained using laser interferometry on a LEGEX CMMs are used to present the main concepts.
    Źródło:
    Journal of Machine Engineering; 2010, 10, 4; 89-99
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of soil aggregate stability using low intensity ultrasonic vibrations
    Autorzy:
    Schomakers, J.
    Mentler, A.
    Steurer, T.
    Klik, A.
    Mayer, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/24235.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil aggregate
    stability
    low intensity vibration
    ultrasonic vibration
    cavitation limit
    carbon distribution
    tillage
    ultrasonic dispersion
    ultrasonic method
    Źródło:
    International Agrophysics; 2011, 25, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A case of cutaneous larva migrans syndrome found in group of Polish citizens after coming back from Botswana
    Autorzy:
    Kotlowski, A.
    Olszanski, R.
    Rejewska, B.
    Mayer, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/838823.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    cat
    Botswana
    Mediterranean zone
    Asia
    South America
    Polish citizen
    cutaneous larva
    dog
    Ancylostoma braziliense
    nematode
    climatic zone
    larva
    Africa
    Źródło:
    Annals of Parasitology; 1998, 44, 3
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Case of myiasis after coming back from tropic
    Autorzy:
    Kotlowski, A.
    Rejewska, B.
    Mayer, L.
    Nahorski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/839201.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasitic disease
    parasite
    Cordylobia anthrophagea
    skin
    man
    fly
    animal
    cutaneous myiasis
    larva
    Africa
    myiasis
    Tropics,The
    Źródło:
    Annals of Parasitology; 1998, 44, 3
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of Honeycomb Structures Produced by Investment Casting
    Autorzy:
    Naplocha, K.
    Dmitruk, A.
    Mayer, P.
    Kaczmar, J. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/382969.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    investment casting
    3D printing
    honeycomb design
    light structure
    odlewnie
    drukowanie 3d
    projekt plaster miodu
    plaster miodu
    lekkie konstrukcje
    Opis:
    Investment casting combined with the additive manufacturing technology enables production of the thin-walled elements, that are geometrically complex, precise and can be easy commercialized. This paper presents design of aluminium alloy honeycombs, which are characterized with light structure, internal parallel oriented channels and suitable stiffness. Based on 3D printed pattern the mould was prepared from standard ceramic material subjected subsequently to appropriate heat treatment. Into created mould cavity with intricate and susceptible structure molten AC 44200 aluminium alloy was poured under low pressure. Properly designed gating system and selected process parameters enabled to limit the shrinkage voids, porosities and misruns. Compression examination performed in two directions showed different mechanisms of cell deformation. Characteristic plateau region of stress-strain curves allowed to determine absorbed energy per unit volume, which was 485 or 402 J/mm3 depending on load direction. Elaborated technology will be applied for the production of honeycomb based elements designated for energy absorption capability.
    Źródło:
    Archives of Foundry Engineering; 2019, 4; 76-80
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ti remobilization and sulphide/sulphoarsenide mineralization in amphibolites: effect of granite intrusion (the Karkonosze–Izera Massif, SW Poland)
    Autorzy:
    Mochnacka, K.
    Oberc-Dziedzic, T.
    Mayer, W.
    Pieczka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059096.pdf
    Data publikacji:
    2008
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Karkonosze granite
    Ti mineralization
    hydrothermal sulphide/sulphoarsenide mineralization
    contact metamorphism
    Opis:
    Our studies focus on ore mineralization in a contact-metamorphic aureole, using the Variscan Karkonosze Granite pluton as an example. The Karkonosze in trusion is enveloped by an Early Palaeozoic (about 500 Ma) metamorphic complex of the Izera–Kowary Unit composed of a diverse assemblage of gneisses, granitic gneisses, schists, amphibolites and marbles. The Budniki ore mineralization site was discovered in the early 1950's at the SE margin of the pluton. The uneconomic Ti-ox ide/sil i cate, Fe-Cu-Ni-Co-sulphide-sulphoarsenide, and uranium mineral deposits are hosted within amphibolites which were subjected to regional metamor phism fol lowed by contact meta - morphism. The Ti mineralization includes an ilmenite-titanite assemblage that originated from regional-metamorphic transformation of igneous Ti-bearing minerals, such as ilmenite and tschermakite, of the basic protoliths of amphibolites. During subsequent contact metamorphism, ilmenite was decomposed and, after wards, Al-rich titanite and rutile were formed. The Ti remobilization was coeval with an early stage of superimposed Fe-Cu-Ni-Co-sulphide/sulphoarsenide mineralization (pyrrhotite, pyrite, pentlandite, arsenopyrite, chalcopyrite, sphalerite and Fe-Ni-Co-As-S phases), related to the activity of the Karkonosze Granite hydrothermal system. The ore minerals formed successively within a wide range of temperatures (625–250gradeC).
    Źródło:
    Geological Quarterly; 2008, 52, 4; 349-349
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ore mineralization in the Miedzianka area (Karkonosze-Izera Massif, the Sudetes, Poland): new information
    Autorzy:
    Mochnacka, K.
    Oberc-Dziedzic, T.
    Mayer, W.
    Pieczka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086527.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    Miedzianka
    Ciechanowice
    Przybkowice
    Karkonosze-Izera Massif
    ore deposits
    mineral succession
    geothermometry
    Opis:
    The Miedzianka mining district has been known for ages as a site of polymetallic ore deposits with copper and, later, uranium as the main commodities. Although recently uneconomic and hardly accessible, the Miedzianka ores attract Earth scientists due to the interesting and still controversial details of their ore structure, mineralogy and origin. Our examination of the ore mineralization from the Miedzianka district was based exclusively on samples collected from old mining dumps located in the vicinity of Miedzianka and Ciechanowice, and on samples from the only available outcrop in Przybkowice. In samples from the Miedzianka field, chalcopyrite, pyrite, galena, bornite, chalcocite, digenite, arsenopyrite, magnetite, sphalerite, tetrahedrite-tennantite, bornite, hematite, martite, pyrrhotite, ilmenite, cassiterite and covellite are hosted in quartz-mica schists and in coarse-grained quartz with chlorite. In the Ciechanowice field, the ore mineralization occurs mainly in strongly chloritized amphibolites occasionally intergrown with quartz and, rarely, with carbonates. Other host-rocks are quartz-chlorite schist and quartzites. Microscopic examination revealed the presence of chalcopyrite, pyrite, sphalerite, galena, tetrahedrite-tennantite, bismuthinite, native Bi, arsenopyrite, löllingite, cassiterite, cobaltite, gersdorffite, chalcocite, cassiterite, bornite, covellite, marcasite and pyrrhotite. Moreover, mawsonite and wittichenite were identified for the first time in the district. In barite veins cross-cutting the greenstones and greenschists in Przybkowice, we found previously-known chalcopyrite, chalcocite and galena. The composition of the hydrothermal fluids is suggested to evolved through a series of consecutive systems characterized, in turn, by Ti-Fe-Sn, Fe- As-S, Fe-Co-As-S, Cu-Zn-S and, finally, Cu-Pb-Sb-As-Bi compositions.
    Źródło:
    Mineralogia; 2012, 43, 3/4; 155--178
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isotopic Re-Os age of molybdenite from the Szklarska Poręba Huta Quarry (Karkonosze, SW Poland)
    Autorzy:
    Mayer, W.
    Creaser, R. A.
    Mochnacka, K.
    Oberc-Dziedzic, T.
    Pieczka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059392.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Karkonosze granite
    hydrothermal mineralisation
    Re/Os isotopic age
    Opis:
    New Re/Os isotopic data for molybdenite from the Szklarska Poręba Huta Quarry provide ages of 307 ± 2 Ma and 309 ± 2 Ma, respectively. The quarry is dominated by the porphyritic (“central”) and equigranular (“ridge”) varieties of the Karkonosze granite. Ore mineralisation hosted in aplogranite includes an assemblage of sulphides, sulphosalts, oxides and various rare phases. The molybdenite ages obtained are consistent with a previously published isotopic age of leucogranite (aplogranite?) from the same quarry and are only slightly older than a recently published, refined 2 6Pb/238U age of untreated zircons from the Szklarska Poręba Huta porphyritic granite. The age of the molybdenite corresponds moderately well to the younger stage of post-magmatic, pneumatolitic/hydrothermal activity of the Karkonosze granite (about 312 Ma).
    Źródło:
    Geological Quarterly; 2012, 56, 3; 505--512
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of soil aggregate breakdown dynamics under low dispersive ultrasonic energies with sedimentation and X-ray attenuation
    Autorzy:
    Schomakers, J.
    Zehetner, F.
    Mentler, A.
    Ottner, F.
    Mayer, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/24254.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2015, 29, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterisation of soil aggregate stability by ultrasonic dispersion
    Autorzy:
    Mentler, A.
    Mayer, H.
    Strauss, P.
    Blum, W.E.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/24609.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    ultrasonic dispersion
    soil aggregate
    soil particle dispersion
    aggregate stability
    Źródło:
    International Agrophysics; 2004, 18, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania in vitro lekoodpornosci szczepow grzybow z rodzaju Candida
    Autorzy:
    Banach-Piatkowska, W
    Kotlowski, A.
    Humanowska, J.
    Mayer, L.
    Kowalczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/840174.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    lekoopornosc
    grzyby
    szczepy chorobotworcze
    Candida
    leki przeciwgrzybicze
    badania in vitro
    Opis:
    The purpose of this study was to determine the in vitro susceptibility to 6 antifungal agents of 143 strains of Candida species isolated from 545 patients with suspicion of fungal infection. Test ATB Fungus (bioMerieux) was used. Among all Candida isolates 91.6% were susceptible to tested polyenes and 32.9% to all azoles. Less susceptible to polyenes isolates were noted in low percentage (0.7 to 4.2%) and to azoles more frequcntly (32.9 to 41.2%). Candida isolates resistant to antifungal agents tested were dependent from the kind of clinical samples and species of fungi. Monitoring of the susceptibility to antifungal agents by ATB commercial test seems to be uscful tool for therapeutic purposes.
    Źródło:
    Annals of Parasitology; 2001, 47, 4; 811-816
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania in vitro lekoodporności szczepów grzybów z rodzaju Candida
    IN VITRO RESISTANCE OF CANDIDA SPECIES TO ANTIFUNGAL AGENTS
    Autorzy:
    Banach-Piątkowska, W.
    Kotłowski, A.
    Humanowska, J.
    Mayer, L.
    Kowalczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2148224.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    lekoopornosc
    grzyby
    szczepy chorobotworcze
    Candida
    leki przeciwgrzybicze
    badania in vitro
    Opis:
    The purpose of this study was to determine the in vitro susceptibility to 6 antifungal agents of 143 strains of Candida species isolated from 545 patients with suspicion of fungal infection. Test ATB Fungus (bioMerieux) was used. Among all Candida isolates 91.6% were susceptible to tested polyenes and 32.9% to all azoles. Less susceptible to polyenes isolates were noted in low percentage (0.7 to 4.2%) and to azoles more frequcntly (32.9 to 41.2%). Candida isolates resistant to antifungal agents tested were dependent from the kind of clinical samples and species of fungi. Monitoring of the susceptibility to antifungal agents by ATB commercial test seems to be uscful tool for therapeutic purposes.
    Źródło:
    Wiadomości Parazytologiczne; 2001, 47, 4; 811-816
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on magnetite and pyrite mineralization, and on their early Palaeozoic ocean-floor host-rocks from the Leszczyniec Unit (West Sudetes, Poland)
    Autorzy:
    Oberc-Dziedzic, T.
    Mochnacka, K.
    Mayer, W.
    Pieczka, A.
    Creaser, R. A.
    Góralski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/191471.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    magnetite and pyrite mineralization
    metabasites
    ocean-floor metamorphism
    paragonite
    Leszczyniec Unit
    Sudetes
    Polska
    Opis:
    The Leszczyniec Unit extends along the eastern margin of the Karkonosze-Izera Massif. It comprises the Early Palaeozoic, MORB-like Leszczyniec complex composed of metabasites, metagranites and metasedi- ments. The metabasites host magnetite mineralization encountered in Jarkowice, whereas near Wieściszowice village the pyrite deposit occurs in metasediments and metabasites. The common feature of both sites is the almost complete absence of the accompanying ore minerals. Basing on petrographic, mineralogical, geochemical and microstructural studies, it was found that the metabasic rocks, which host magnetite mineralization, were lava flows, whereas the protoliths of pyrite-bearing schists were basic and acid tuffites accompanied by ocean-floor basalts. The igneous rocks from the Leszczyniec Unit were subjected to the ocean-floor metamorphism, whereas the accompanying sediments were altered by hydrothermal fluids enriched in sulphur ions, which reacted with iron derived from the sediment and promoted crystallization of pyrite. The sources of hydrothermal fluids were adjacent magmatic centres. The estimated age ~480 Ma for pyrite (Re-Os method) is similar to the previously known ~500 Ma age of metabasites (U-Pb, zircon method) from the Leszczyniec Unit, which establishes a temporal link between pyrite accumulation and the ocean-floor environment. The rocks of the Leszczyniec Unit, first altered by the ocean-floor metamorphism and the hydrothermal fluids, were subsequently subjected to the regional metamorphism at 360–340 Ma and the two-stage deformations of various intensities, followed by the third stage of deformations which caused the reorientation of the regional foliation. The zones of ductile and brittle deformations connected with the second deformation event host the accumulations of magnetite formed at the expense of Fe-bearing rock-forming minerals or from iron supplied from adjacent sources. In the pyrite-bearing schists, mineral assemblages formed during the hydrothermal alteration have been subjected to recrystallization and were included into domains defining foliation and lineation, which formed during the first stage of deformation. Pyrite crystals were affected by both deformation stages. At the end of the second stage, the invasion of fluids led to the dissolution of pyrite crystals and to the filling of cracks in pyrite crystals with chalcopyrite and tennantite. This process was followed by the formation of quartz veins with minor amounts of ore minerals.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 2; 133-160
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fast Stochastic Reorientations in Nematic PAA and PAP
    Autorzy:
    Podsiadły, R.
    Mayer, J.
    Janik, J. A.
    Krawczyk, J.
    Stanek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1963251.pdf
    Data publikacji:
    1997-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    35.20.Yh
    24.50.Fq
    61.30.Eb
    Opis:
    Incoherent quasielastic neutron scattering spectra were measured for nematic para-azoxyanisole (PAA) and para-azoxyphenetole (PAP) with the energy resolution of ca. 30 μ eV, at Dubna IBR-2 reactor. Data processing contained a careful background subtraction and the multiple scattering correction. The corrected spectra were subjected to a reorientational model fitting procedure. For PAA, a model of two convoluted reorientations - that of benzene rings coupled with the terminals and that of the whole molecule around the long molecular axis - gave a fairly good description of the quasielastic neutron scattering spectrum. For PAP, introducing a third motion - interconformational jumps in the ethoxy terminals - in addition to motions suggested for PAA, gave a good agreement with the measured quasielastic neutron scattering spectrum.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 3; 513-518
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of the frequency of the invasion and accompanying clinical symptoms in Blastocystis hominis invasion in selected age and environmental groups
    Autorzy:
    Kotlowski, A.
    Miroslaw, B.
    Mayer, L.
    Badowska-Szalewska, E.
    Piatkowska, W.
    Kilinski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/837718.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasite
    infection
    pathogenicity
    invasion
    gastrointestinal tract
    HIV
    Protozoa
    Blastocystis hominis
    Źródło:
    Annals of Parasitology; 1998, 44, 3
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary results of sulphur isotope studies on sulfides from selected ore deposits and occurrences in the Karkonosze–Izera Massif (the Sudety Mts., Poland)
    Autorzy:
    Mayer, W.
    Jędrysek, M.O.
    Górka, M.
    Drzewicki, W.
    Mochnacka, K.
    Pieczka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086529.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    Karkonosze-Izera Massif
    sulphur isotope studies
    polymetallic mineralization
    Opis:
    Preliminary sulphur isotope data are presented for selected ore deposits and occurrences in the Karkonosze-Izera Massif, namely, polymetallic mineralization sites at Budniki, Ciechanowice, Izerskie Garby and Sowia Dolina, and the pyrite deposit at Wieściszowice. The data reveal two populations of δ34S values: from 2.74 to 3.95‰ (pyrrhotites and pyrites in Sowia Dolina, and some pyrites in Wieściszowice) and from 0.79 to 1.8‰ (pyrites in Budniki, Ciechanowice and Izerskie Garby, and some pyrites from Wieściszowice). All of the data are indicative of endogenic sulphur typical of hydrothermal mineralization despite the genetic differences between the sites.
    Źródło:
    Mineralogia; 2012, 43, 3/4; 213--222
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of vibration amplitude on the ultrasonic dispersion of soils
    Autorzy:
    Mayer, H.
    Mentler, A.
    Papakyriacou, M.
    Rampazzo, N.
    Marxer, Y.
    Blum, W.E.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/24900.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    ultrasonic dispersion
    ultrasonic energy
    dispersion experiment
    soil
    vibration amplitude
    particle distribution
    soil aggregate
    Źródło:
    International Agrophysics; 2002, 16, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystal structure and spectroscopic properties of 4-acetaminopyridine and its protonated form
    Autorzy:
    Koleva, B.B.
    Nikolova, R.
    Tchapkanov, A.
    Kolev, T.
    Mayer-Figge, H.
    Spiteller, M.
    Sheldrick, W.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/778733.pdf
    Data publikacji:
    2009
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    4-acetyloaminopirydyna
    struktura kryształów
    spektroskopia IR
    spektroskopia UV
    4-acetaminopyridine
    protonated form
    crystal structure
    solid-state linear polarized IR spectroscopy
    UV spectroscopy
    quantum chemical calculations
    1H and 13C NMR
    ESI-MS
    TGA and DSC
    Opis:
    4-Acetaminopyridine dihydrate and its protonated form, stabilized as the hydrochloride salt have been synthesized and spectroscopic elucidated in solution and in the solid-state by means of the inear-polarized solid state IR-spectroscopy (IR-LD), UV-spectroscopy, TGA, DSC, and the positive and negative ESI MS. Quantum chemical calculations were used to obtain the electronic structure, vibrational data and the electronic spectra. The spectroscopic and theoretical data are compared with the structure of the first compound obtained by single crystal X-ray diffraction. The effect of Npy protonation on the optical and magnetic properties of a 4-acetaminopyridine is discussed.
    Źródło:
    Polish Journal of Chemical Technology; 2009, 11, 3; 35-40
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-35 z 35

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