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Autorzy:
Rudnicka, Lidia
Placek, Waldemar
Nowicki, Roman J.
Krasowska, Dorota
Adamski, Zygmunt
Szepietowski, Jacek
Kowalewski, Cezary
Olszewska, Małgorzata
Chlebus, Ewa
Reich, Adam
Sokołowska-Wojdyło, Małgorzata
Zalewska-Janowska, Anna
Czuwara, Joanna
Czarnecka-Operacz, Magdalena
Woźniacka, Anna
Owczarek, Witold
Maj, Joanna
Owczarczyk-Saczonek, Agnieszka
Wojas-Pelc, Anna
Wąsik, Grażyna
Narbutt, Joanna
Majewski, Sławomir
Zegarska, Barbara
Flisiak, Iwona
Lesiak, Aleksandra
Batycka-Baran, Aleksandra
Czajkowski, Rafał
Opis:
Rosacea is a chronic, relapsing, inflammatory, but not infectious, skin disease. The prevalence of rosacea is relatively high in the adult population of Northern Europe. Its characteristic symptoms include recurrent flushing, erythema, telangiectasia, papules and pustules, localized on cheeks, nose, chin and forehead. At present, four, not mutually exclusive subtypes of acne are classified: erythematotelangiectatic, maculopapular, hypertrophic and ocular. The clinical presentation of this dermatosis is heterogeneous. Clinical symptoms and their severity may vary individually. For this reason, treatment should be individualized and take into consideration the type of cutaneous lesions, presence of comorbidities, patient’s occupation, impact of the disease on the quality of life, and patient’s preferences. In addition to topical and systemic medications, adequate skin care is important.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
UV polymerization and property analysis of maleacylated methyl cellulose acrylic acid absorbent resin
Autorzy:
Li, Ying
Sawut, Amatjan
Hou, Gongbo
He, Mingyu
Yimit, Mamatjan
Tematy:
ultraviolet
maleylated methylcellulose
absorbent resin
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Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:
https://bibliotekanauki.pl/articles/778577.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, maleic anhydride (MA) was grafted onto methyl cellulose (MC) and then reacted with acrylic acid to synthesize a high gel strength and fast water absorption resin (AA-co-MC-g-MA) by UV polymerization. The reaction conditions of maleylated methylcellulose (MC-g-MA) were investigated, including the ratio of MC to MA, reaction time and catalyst amount. In addition, the reaction conditions for the synthesis of super absorbent resin were as follows: the amount of MC-g-MA, the degree of substitution of MC-g-MA, polymerization time, and the amount of initiator. Under optimal conditions, the maximum water absorption volume of synthetic resin was 2116 g/g, and the maximum salt absorption rate was 139 g/g. The water absorption resin prepared this time had high water absorption, water retention, excellent pH sensitivity, etc. It was hoped that it will have a good application prospect in the field of industrial production and agriculture in the future.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Use of Membrane Technologies of the CWTP to Obtain Quality Drinking Water
Autorzy:
Yelemanova, Aliya
Aliyarova, Madina
Begimbetova, Ainur
Jangaskina, Alina
Temirbekova, Marzhan
Tematy:
drinking water
ultrafiltration
nanofiltration
ultraviolet disinfection
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Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:
https://bibliotekanauki.pl/articles/1955477.pdf  Link otwiera się w nowym oknie
Opis:
The purpose of the study is a scientific and theoretical substantiation of the energy characteristics of ultra and nano filtration, which directly depend on the quality of the source water, to ensure reliable and uninterrupted operation of a combined water treatment plant (CWTP), to obtain high-quality drinking water in water supply systems intended for settlements and industrial facilities. The developed method of combined operation of a water treatment plant is based on membrane technology, the efficiency of which directly depends on the preliminary improvement of the quality of purified low-mineralized water using an energy-efficient membrane, post-treatment and subsequent disinfection. Indicators of the quality of treated water that meet regulatory requirements and indicators of improving the energy efficiency of the water treatment plant have been investigated and calculated on the basis of experimental data. The results of studies on low-mineralized water made it possible to obtain TDS (Total dissolved solids) with a total residual concentration of hardness and chlorides in the range of 0.77 mg/dm3 without any problems. The proposed combined water treatment plant method is a priority among fundamental and applied works in the field of water treatment, it is intended for the purification of natural waters under conditions of increased anthropogenic loads on natural water sources.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring non-coherent optical radiation at work places
Autorzy:
Pawlak, A.
Tematy:
ultraviolet
visible and infrared radiation
irradiance
radiance
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Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:
https://bibliotekanauki.pl/articles/359085.pdf  Link otwiera się w nowym oknie
Opis:
This paper presents the requirements for the method and extent of testing of non coherent optical radiation at work places, as well as the meters used for tests. The requirements are based on the current standards in the field of optical radiation. The scope of the exposure measurements are presented in conjunction with the current values of MDE. There is a description of the method of determining the angular dimension of radiation source á and how to calculate the effective source radiance from the measured effective irradiance. At the end, the paper presents the recommended frequency of testing and suggestions concerning the content of the study.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the power (Watts) of the actinic light do not affect its better performance vs the ultraviolet light
Autorzy:
Matos da Costa, João
Tematy:
actinic light
traps on insects
ultraviolet light
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Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:
https://bibliotekanauki.pl/articles/1193453.pdf  Link otwiera się w nowym oknie
Opis:
Monitoring systems should be simple, time and cost effective, and collect as much information as possible, regarding the diversity of the communities under study. Most of studies use ultraviolet light traps to survey moths, although is known that the spectral sensitivity of moths has other wavelengths absorption peaks. As wider is the spectrum emitted by the lamps the wider is the fauna attracted and possible to be collected. The wider spectrum of actinic light, once it emits a large part of the ultraviolet wavelength as well as a peak at the blue, attracted more species than the ultraviolet light. In 2018 and 2019 the actinic light captured more species in 75% of the surveyed areas, while in 2020 in all areas. In 2018 and 2019, the power of the actinic light was 15 W and the ultraviolet light only 8 W. The actinic light trap captured, in 295 samples (50%), more species than the UV light trap which had a better performance in 201 samples (34%). In 2020 both light traps have the same power, 8 W, and results were similar, the actinic light collected more species in 123 samples (50%) than the ultraviolet light which in 48 samples (35%) collected more species than the actinic light.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of the compositional graded quaternary barrier AlGaN-based ultraviolet-C light-emitting diode
Autorzy:
Malik, S.
Usman, Muhammad
Hussain, M.
Munsif, M.
Khan, S.
Rasheed, S.
Ali, S.
Tematy:
ultraviolet
light-emitting diodes
efficiency
quantum wells
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:
https://bibliotekanauki.pl/articles/1818198.pdf  Link otwiera się w nowym oknie
Opis:
The compositional graded quaternary barriers (GQBs) instead of ternary/conventional quantum barriers (QBs) have been used to numerically enhance the efficiency of AlGaN-based ultraviolet light-emitting diode (LED). The performance of LED with GQBs is examined through carrier concentrations, energy band diagrams, radiative recombination, electron and hole flux, internal quantum efficiency (IQE), and emission spectrum. As a function of the operating current density, a considerable reduction in efficiency droop is observed in the device with composition-graded quaternary barriers as compared to the conventional structure. The efficiency droop in case of a conventional LED is ~77% which decreased to ~33% in case of the proposed structure. Moreover, the concentration of electrons and holes across the active region in case of the proposed structure is increased to ~156% and ~44%, respectively
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultraviolet filters for sensors matching biological action spectra
Autorzy:
Garoli, D
Alaibac, M
Pelizzo, M G
Tematy:
ultraviolet
radiometers
filters
action curve
effective measurements
Pokaż więcej
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/173284.pdf  Link otwiera się w nowym oknie
Opis:
A considerable interest is growing worldwide about the photobiological effects of the ultraviolet radiation; in fact, it has been demonstrated that ultraviolet radiation can affect both human health as well as the equilibrium of entire ecosystems. The relative effectiveness of ultraviolet radiation at a particular wavelength in producing a specific biological response is defined by an action spectrum. Broadband radiometers characterized by having a spectral response that matches an action spectrum allow the measure of the effective irradiance associated to an ultraviolet source. In this work we present the designs of interference filters to be used in radiometric heads. Their optimized transmission curve coupled to the spectral response of different ultraviolet photodiodes provides the match of the sensor spectral response with some selected action spectra. Development of instruments for the measurement of the effective solar irradiance is foreseen. The design of interferential filters which transmittance curve was optimized in order to match a target biological action spectrum is here presented.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 143

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