Temat: characterisation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Morphological and Molecular Characteristics of Kudoa viseuensis n. sp. (Myxosporea: Multivalvulida), Found in the Muscle of Batrachoides surinamensis (Teleostei: Batrachoididae) in the Brazilian Amazon Region
Autorzy:: Monteiro, Elideth Pacheco
Da Silva, Diehgo Tuloza
Hamoy, Igor
Sanches, Osimar
Matos, Edilson Rodrigues
Powiązania:: https://bibliotekanauki.pl/articles/52071482.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:: Myxozoa
molecular characterisation
morphology
Opis:: A new species of myxozoan, Kudoa viseuensis n. sp. (Myxosporea: Multivalvulida), is described based on specimens extracted from the musculature of the Pacuma toadfish, Batrachoides surinamensis, collected in the municipality of Viseu, in the northern Brazilian state of Pará. A total of 60 specimens of B. surinamensis were examined, of which 52 (86%) presented whitish pseudocysts containing numerous rounded spores (7.2±0.2 μm in length and 5.2±0.2 μm in width). These spores have four polar capsules of equal size, measuring 1.8±0.2 μm x 1.3±0.1 μm in the apical view, and 2.7±0.2 μm x 1.3±0.1 μm in the lateral view. A partial sequence (1400 bps) of the small subunit ribosomal RNA gene was obtained and deposited in GenBank (access number: MK256272). The comparison of the morphological and molecular data with those of other Kudoa species supported the description of a new species of mixosporean from the Amazon region, which is denominated here as Kudoa viseuensis n. sp.
Źródło:: Acta Protozoologica; 2019, 58, 1; 7-16
0065-1583
1689-0027
Pojawia się w:: Acta Protozoologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Using multibeam echoes in seafloor characterisation and classification
Autorzy:: Łubniewski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/331600.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: multibeam echoes
seafloor characterisation
sonars
Opis:: The method of seabed identification and classification from multibeam sonar echoes is presented. The proposed approach is based on calculation of a set of parameters of an echo envelope, similarly as in seafloor classification using single beam echosounder. These parameters are extracted for each consecutive beam allowing the estimation of their dependence on the seafloor incident angle. The relation between seabed type and calculated echo parameters and its angular dependence, is investigated. The results obtained using sonar data records from several bottom types in Gdańsk Bay water region are presented and discussed. It has been primarily justified that the proposed approach may be useful in seafloor characterisation.
Źródło:: Hydroacoustics; 2008, 11; 265-270
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Terahertz dielectric characterisation of fibres in a time-domain spectrometer
Autorzy:: Pacewicz, Adam
Kopyt, Paweł
Cuper, Jerzy
Krysicki, Mateusz
Salski, Bartłomiej
Powiązania:: https://bibliotekanauki.pl/articles/2204194.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:: terahertz spectroscopy
fibre characterisation
dielectric materials
Opis:: An innovative measurement setup for the dielectric characterisation of fibres in a terahertz time-domain spectrometer using an HDPE elliptical lens for coupling into the fibres has been built and validated by measurements of several different types of samples. The setup is based on a commercial all fibre-coupled terahertz time-domain spectrometer. Measurements of the effective refractive index have been conducted on polypropylene-based three-dimensional printing filaments, silica glass rods, and a polytetrafluoroethylene cord of lowered density, covering the frequency range of approximately 100 GHz to 1 THz. The theoretical part of the work includes numerical calculations performed via the finite difference eigenmode method and the characteristic equations of a uniform circular dielectric waveguide for a few guided modes, from which it is clear that primarily the fundamental mode propagates along the fibre. Details on model-based phase corrections, crucial to the accurate determination of the effective refractive index of dispersive fibres, have been presented as well.
Źródło:: Opto-Electronics Review; 2023, 31, 2; art. no. e144596
1230-3402
Pojawia się w:: Opto-Electronics Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Lowering the uncertainty in fast noise measurement procedures
Autorzy:: Acciari, G.
Giannini, F.
Limiti, E.
Saggio, G.
Powiązania:: https://bibliotekanauki.pl/articles/308146.pdf
Data publikacji:: 2002
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: noise
device characterisation
measurement errors
lowering uncertainty
Opis:: To completely characterise the noise behaviour of a two port device, four noise parameters F(min), R(n), G(opt) and B(opt) must be determined. This paper reports improvements in the uncertainty related to the above parameters, taking into account measurement errors due both to the limited instrument precision and connection repeatability. Results are reported for noise characterisation of 0.3 žm delta-doped HEMT devices by Alenia, demonstrating as the common hot-cold measurement procedure can result with an error confidence as low as 0.2% for all the noise parameters.
Źródło:: Journal of Telecommunications and Information Technology; 2002, 1; 29-33
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Charakterystyka chemiczna gleb i szaty roślinnej użytków zielonych w dolinie ujścia Warty
Chemical characteristics of soils and vegetation cover of grasslands in the Warta estuary valley
Autorzy:: Czyż, H.
Malinowski, R.
Kitczak, T.
Przybyszewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/1818957.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: charakterystyka chemiczna
szata roślinna
chemical characterisation
vegetation
Opis:: Alluvial soils, which are found under the grasslands in the study area, are formed by erosive and sedimentation activity of waters from surface and river flows. These waters in river valleys, depending on the activity duration, flow speed and the frequency of overflows, determine the spatial distribution of sediments, the variability of their mechanical composition, as well as the layers thickness, the content of organic matter and the diversity of the lay of alluvial material areas. The mentioned factors have significant influence on the structure of soil profile and on the elements circulation in the trophic chain: soil – water – plant – animal – human. The aim of the study was the typological identification of soils in the floodplain of the Warta estuary valley, as well as the characterization of their basic physical and chemical features, with the special consideration to contamination with heavy metals. Moreover, the chemical content of the plant communities in the study area was described. The studies were conducted in the Warta valley on the passage between Świerkocin and Kłopotowo, on grasslands which are part of the right flood terrace of the valley, between the water surface and the levee (floodbank). Objects of varied habitat conditions and vegetation were isolated on the chosen area for the specific research .The characterization of soil conditions was performed according to the methods commonly used in pedology. Based on the description of morphological features of soil pits, the following subtypes of alluvial soils were distinguished: heavy humus, medium brown, actual medium, actual very light. Shaped plant communities were qualified to the following floristic types: Glyceria maxima, Phalaris arundinacea, Poa trivialis, Poa pratensis, Festuca rubra and Corynephorus cannescens. The analyzed soils were evaluated as rich in general forms: P, K, Mg, Ca, Na i S. Compacted soils were usually rich in absorbable phosphorus, the content of absorbable magnesium was from very low to high, while in very light soils the content of phosphorus and magnesium was law. Regardless of the soil type, the content of absorbable potassium found in all soil samples was very low. The analyzed soils had the natural content of heavy metals (Cd, Co, Cu, Ni, Pb, Zn, Mn, Fe), only in surface layer of heavy humus alluvial soil high contamination with cadmium and raised contamination with zinc were found. Varied content of macroelements was found in the grassland sward of the individual study points. The richest in P, K, Mg, Ca and Na was the community of rough bluegrass (Poa trivialis), located on river actual medium alluvial soil in the vicinity of embankment and subject to the constant flooding of Warta. The poorest in the analyzed heavy metals were the communities of Poa pratensis and Festuca rubra with Corynephorus cannescens on actual very light alluvial soil. Only in case of lead, high content in the sward of Phalaris arundinacea formed on actual medium alluvial soil near the water surface was found. As regards other heavy metals there was no excess of their content in the grassland sward of the studied area.
Źródło:: Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 1; 694-713
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Prospects for using wastewater from a farm for algae cultivation: The case of Eastern Colombia
Autorzy:: Urbina-Suarez, Nestor Andres
Barajas-Solano, Andres Fernando
Garcia-Martinez, Janet Bibiana
Lopez-Barrera, German Luciano
González-Delgado, Angel Dario
Powiązania:: https://bibliotekanauki.pl/articles/2073734.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: biological treatment
characterisation
microalgae
monitoring
nutrient wastewater
Opis:: In recent years, the technical and economic feasibility of using microalgae and cyanobacteria has been explored for the removal and exploitation of domestic, agricultural and industrial residual effluents with high C, N and P compounds content. To contribute to the understanding of the process and its technical viability for microalgae growth, the article discusses monitoring, flow determination, and physicochemical characteristics of two types of effluents generated in an experimental farm located in the east of Colombia, before (R1) and after biological treatment (R2). In general, the results showed the reduction of different parameters, such as total dissolved solids (TDS), hardness, salinity and phosphates after treatment with activated sludge. However, the conductivity value obtained in R1 and R2 showed the presence of a pollutant load. These findings can be attributed to the highest concentration of fats and oils in the water during early hours of the day. Finally, although the concentration of nitrates increased from 46.63 to 225.21 mg∙dm-3 and phosphate decreased slightly from 9.65 to 6.21 mg∙dm-3,no inhibition was generated in the microalgae, as evidenced in the growth of the microalgal biomass in effluents after nitrate and phosphate removal above 80%.
Źródło:: Journal of Water and Land Development; 2022, 52; 172--179
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Adsorbent Characterization from Cocoa Shell Pyrolysis (Theobroma cacao L) and its Application in Mercury Ion Reduction
Autorzy:: Nursiah, Cut
Desvita, Hera
Elviani, Elviani
Farida, Nurlia
Muslim, Abrar
Rosnelly, Cut Meurah
Mariana, Mariana
Suhendrayatna, Suhendrayatna
Powiązania:: https://bibliotekanauki.pl/articles/24202895.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: characterisation
pyrolysis
adsorbent
cocoa shell
mercury ion
Opis:: In this paper, we describe the characterization and application of adsorbent derived from the pyrolysis of cocoa shells, which is a natural source of adsorbent materials. The adsorbent that was used in this experiment is an environmentally friendly adsorbent that was prepared by the pyrolysis of cocoa shells. For 1.5 hours, the pyrolysis process was carried out at temperatures ranging from 300 to 380 °C. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and analysis with an X-ray diffraction (XRD) analyzer. Water-ash content and iodine absorption capacity were also determined in accordance with SNI 06-3730-1995. At a contact time of 90 minutes, the adsorption capacity of mercury ions was found to be 0.106 mg/gram. In this study, the adsorption of mercury ions with the adsorbent followed pseudo-second-order models with an R2 value of 0.9929.
Źródło:: Journal of Ecological Engineering; 2023, 24, 6; 366--375
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Charakterystyka kolorymetryczna włosów ludzkich
Colorimetric characterisation of human hair
Autorzy:: Cholewa, R.
Kryszak, J.
Powiązania:: https://bibliotekanauki.pl/articles/270729.pdf
Data publikacji:: 2010
Wydawca:: Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:: włosy ludzkie
charakterystyka kolorymetryczna
human hair
colorimetric characterisation
Opis:: Celem wykonanych badań była ocena kolorymetryczna barwy włosów ludzkich pochodzących od kobiet i mężczyzn. Prace te wykonano na 165 próbkach włosów czarnych, szatynowych, blond i rudych bez jakiejkolwiek obróbki barwnej (np. farbowania), które pobrano z okolicy potylicznej w okresie jesienno-zimowym i wiosenno-letnim. Pomiary barwy włosów wykonano w Uniwersytecie Ekonomicznym w Poznaniu za pomocą kolorymetru Minolta CR-200 przy stałym obciążeniu (200 g) i polu pomiaru aparatu 8 mm. Uzyskane wyniki wykazały, że wartości wskaźników kolorymetrycznych barwy włosów były niezależne od pory roku, natomiast wpływ płci na nie był nieznaczny w grupie włosów szatynowych i rudych ze wskazaniem na większe wartości u kobiet niż u mężczyzn.
The objective of the performed investigations was to assess colorimetrically the colour of human hair derived from females and males. Experiments were carried out on 165 samples of black, brown, blond and red hair without any colour treatment (e.g. hair-dyeing) which were collected from the occiput region during the autumn-winter and spring-summer periods. Colour measurements were made at the Economic University in Poznań with the assistance of a Minolta CR-200 colorimeter at constant load (200 g) and camera diaphragm of 8 mm. The obtained results demonstrated that colorimetric index values of hair colour were independent of the season of the year, whereas the impact of gender on these values was small in the group of brown and red hair with higher values in women than in men.
Źródło:: Aparatura Badawcza i Dydaktyczna; 2010, 15, 4; 9-13
2392-1765
Pojawia się w:: Aparatura Badawcza i Dydaktyczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Environmental Assessment of an Abandoned Briquette Factory – A Case Study at Nagymányok Area, Former Industrial Zone
Autorzy:: Halász, Amade
Dezső, József
Poor, Viktoria
Powiązania:: https://bibliotekanauki.pl/articles/1052711.pdf
Data publikacji:: 2016-03-15
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: Nagymányok
environmental assessment
industrial zone
metal contamination
risk characterisation
Opis:: The study is focused on environmental assessments of impacts by former briquette factory at the Nagymányok area in South Hungary. The (former) industrial zone is located in a northern valley of the Eastern Mecsek Mountains. Until the 1990s this company was the largest briquette factory in Hungary and the demolition works are still incomplete. former investigations were based on only five samples. our sampling sites were selected on the basis of the source of the contaminations and then we covered the whole area in equal distribution. We used the A1-F6 codes for the sample places. We have started from southwest to northeast. The samples were analyzed for Total Petrol Hydrocarbons (TPHs), Polycyclic Aromatic Hydrocarbons (PAHs) and for heavy metals. The area was heavily contaminated by TPHs and moderately heavy metals (such as Cu, Cr, Zn and Pb). Highest contaminant concentrations were found around the former industrial buildings, especially between the boiler-house and the coal-pillbox. In the industrial area the mean of the detected values is below the upper limit of the legal exposure values, but among the former industrial buildings higher (e.g. toxic level) concentration values were detected in multiple samples. Based on our investigation the pollutant can be transported by wind or by water on the surface (stream bed) or underground. The hazardous material can easily reach some part of the city, therefore reclamation is necesarry.
Źródło:: Quaestiones Geographicae; 2016, 35, 1; 69-79
0137-477X
2081-6383
Pojawia się w:: Quaestiones Geographicae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Adaptation and application of a polarisation curve test protocol for a commercial pem electrolyser on cell and stack level
Autorzy:: Jaramillo-Rodríguez, Nicol Daniela
Luxa, Aline
Jürgensen, Lars
Powiązania:: https://bibliotekanauki.pl/articles/2233070.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: PEM
water electrolysis
test protocol
electrochemical characterisation
polarisation curves
Opis:: The present study aims to develop a test protocol based on the literature for electrochemical characterisation of a polymer electrolyte membrane (PEM) electrolysis commercial stack using polarisation curves. For this, a 1-kW water electrolysis test stand with integrated temperature control and measurement systems was built around the stack. Afterwards, the stack performance was characterised under different operating pressure and temperature conditions by using polarisation curves. A measurement protocol was developed based on the literature. To ensure the reproducibility of the results, two rounds of experiments were performed. The experiments were carried out at temperatures between 20 and 60 °C and pressures up to 15 bar. The results show distinct regions in the polarisation curves related to the activation and ohmic overvoltage. The effect of temperature and pressure on the performance is shown and analysed. The performance of single cells in the stack is also measured. The stack polarisation curves are compared with those in the literature, which gives an understanding of the materials used in electrodes and types of membranes.
Źródło:: Acta Mechanica et Automatica; 2023, 17, 3; 395--404
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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