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Wyświetlanie 1-15 z 53
Tytuł:
Determination of Accumulated Electrons at PET Surface Using Mirror Effect Phenomena in SEM
Autorzy:
Abood, Tareq H.
Hadi, Hasan A.
Mohi, Ali T.
Powiązania:
https://bibliotekanauki.pl/articles/1192591.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Polyethylene Terephthalate
scanning electron microscope
Magnification Factor Method
Disappearing Method
Opis:
An experimental-theoretical investigation have been presented to exploring phenomena of mirror effect. The Polyethylene Terephthalate (PET) material is chosen to be a case study throughout this work. Where the scanning electron microscope (SEM) is used for executing the experiments. Attention has been focused on determination of the number of electrons that accumulated at PET surface, since it is regarded to be the most important factor for producing mirror effect images. Thus two different procedures are produced to achieve such a task namely Magnification Factor Method and Disappearing Method. Results obtained from these two approaches have clearly shown that mirror effects can accurately be used as an excellent tool to determine dielectric constant of insulator.
Źródło:
World Scientific News; 2016, 55; 27-37
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Digital analysis of geo-referenced concrete Scanning Electron Microscope (SEM) images
Autorzy:
Ahamad, Mohd Sanusi S.
Maizul, Elly Nur Myaisara
Powiązania:
https://bibliotekanauki.pl/articles/1838090.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
scanning electron microscope
geo-referenced imagery
digital image analysis
image mapping
mikroskop skaningowy
cyfrowa analiza obrazu
mapowanie obrazu
Opis:
The microstructural evaluation of complex cementitious materials has been made possible by the microscopic imaging tools such as Scanning Electron Microscope (SEM) and X-Ray Microanalysis. Particularly, the application of concrete SEM imaging and digital image analysis have become common in the analysis and mapping of concrete technology. In this study, six samples of two-dimensional (2D) SEM images were spatially resampled to produce Geo-referenced SEM sample images. Subsequently, they were analyzed and the intensity histogram plot was produced to facilitate visual interpretation. The consecutive digital image analysis performed was the enhancement and noise removal process using two filtering methods i.e. median and adaptive box filter. The filtered resampled images, then undergone the unsupervised K-Means classification process to collectively separate each individual pixel corresponds to the spectral data. By spatial segmentation of K-Means algorithms, the cluster groups generated were carefully reviewed before proceeding to the final analysis. From the resulting data, the mapping of the spatial distribution of k-cluster and the quantification of micro-cracks (voids) were performed. The results of the SEM images (1st - 4th sample) showed a higher percentage of k-cluster data indicating a good correlation with the major elemental composition of EDX analysis, namely Oxide (O), Silicon (Si) and Carbon (C). Meanwhile, the subjective visual assessment of the image (5th and 6th sample) has confirmed the micro-crack developments on the concrete SEM images upon which the crack density was 3.02 % and 1.30 %, respectively.
Źródło:
Civil and Environmental Engineering Reports; 2020, 30, 2; 67-79
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mycoremediation of Heavy Metals Contaminated Soil by Using Indigenous Metallotolerant Fungi
Autorzy:
Akram, Muhammad Bilal
Khan, Ibrar
Ur Rehman, Mujaddad
Sarwar, Abid
Ullah, Najeeb
ur Rahman, Shafiq
Aziz, Tariq
Alharbi, Metab
Alshammari, Abdulrahman
Alasmari, Abdullah F.
Powiązania:
https://bibliotekanauki.pl/articles/27315654.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Mycoremediation
Heavy Metals Contaminated Soil
Korangi Industrial Estate
FTIR
Fourier Transform Infrared Spectroscopy
SEM
Scanning Electron Microscope
Opis:
The present study was aimed to identify the indigenous fungal strains which could possibly be applied to the bioremediation of heavy metal-contaminated soil. The contaminated soil samples of Korangi Industrial Estate Karachi were found to have total concentration of Cu 1.044 mgL1 , and Pb 0.631 mgL–1. A total of eight indigenous strains of the fungus were isolated and screened for bioremediation capacity from heavy metals-contaminated soil. For the bioremediation of Lead (Pb) these same indigenous eight fungal strains were used for biological remediation. All the fungal isolated with enhanced bioremediation capability were through phenotypic and genotypical characterization. The topology of the phylograms established that the fungal isolates used in this study were allocated to: K1 (Penicillium notatum), K2 (Aspergillus parasiticus), K3 (Aspergillus fumigatus), K4 (Aspergillus flavus), K5 (Aspergillus terries), K6 (Fusarium solani), K7 (Penicillium chrysogenum), K8 (Aspergillus niger), K9 (Penicillium piceum) and K10 (Penicillium restrictum). Thus, K8 fungal isolate was found to be more efficient with maximum bioremediation capacity, for copper and lead removal efficiency, and selected for FTIR and SEM to find out the uptake of Cu and Pb which of the functional groups are involved, and further to detect the effects of bioleaching of both heavy metals on to the surface of K8 fungus biomass. The current study indicates that indigenous fungal isolates could be used with high potency to remediate or clean up the heavy metals-contaminated soil either by the technique of in situ or ex-situ bioremediation.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 3; 1--13
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Beam Current Considerations in SEM Accordance to Mirror Effect Phenomenon
Autorzy:
Al-Obaidi, H. N.
Khaleel, I. H.
Powiązania:
https://bibliotekanauki.pl/articles/411880.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
scanning electron microscope
Electron Beam Current
Electron Mirror Images
Opis:
A theoretical investigation have been presented to exploring the influence of electrons beam current on the electron mirror image deduced inside the scanning electron microscope (SEM). A rough mathematical expression for the electric potential that associated with electron beam is derived. The results clearly shows that the beam current could be used to enhance or conversely deteriorate the phenomena of mirror effect. So this work procedure may consider to be tool controllable of this phenomena for investigation purposes.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 1; 70-75
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność szyszek jodły pospolitej (Abies alba Mill.) – zróżnicowanie budowy powierzchni łusek nasiennych
Variability of silver fir (Abies alba Mill.) cones – variability of scale surface area
Autorzy:
Aniszewska, M.
Gendek, A.
Śliwińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/1293578.pdf
Data publikacji:
2017
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
drzewa lesne
jodla pospolita
Abies alba
szyszki
luski nasienne
zmiennosc
pole powierzchni
powierzchnia parowania
mikroskop elektronowy skaningowy
cone
scale
area of evaporation
scanning electron microscope
Opis:
This study was conducted on a batch of closed silver fir cones from Jawor Forest District and a mixture of scales from the seed extraction facility Grotniki. The scales were divided into three size classes corresponding to the bottom, middle and upper part of the cones and their area was measured with the Multi Scan Base v.18.03 software. Based on the sum of the inner and outer surface area of all scales, we then determined the total area of evaporation from the cones. In addition, the area of protruding scales was measured for differently sized scales from different parts of the cones. Previous studies have shown that the average outer surface of a closed cone, calculated as the sum of protruding scales, accounts for 10% of the outer surface of an open cone. Pictures of both scale surfaces with the internal seed bed and the external protrusions were taken using a scanning electron microscope. We noticed significant differences in dimension and shape of the channels and trichomes on the scale surface. On the inner side of the scales, we found a high diversity of trichomes of different lengths, whilst the outer side contained channels. Presumably, these characteristics affect the rate of water loss from the cones during desiccation and separation of the seed. In-depth knowledge on the evaporative surfaces of fir cones and scale structure will be helpful for optimizing the industrial processes of seed extraction.
Źródło:
Leśne Prace Badawcze; 2017, 78, 1
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efekty ekstrakcji pyłku kwiatowego nadkrytycznym dwutlenkiem węgla®
The effects of supercritical carbon dioxide treatment on bee pollen®
Autorzy:
Bakier, S.
Bajko, E.
Powiązania:
https://bibliotekanauki.pl/articles/227616.pdf
Data publikacji:
2017
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Tematy:
ekstrakcja w nadkrytycznym CO2
pyłek kwiatowy
GC-MS
skaningowy mikroskop elektronowy
supercritical CO2 fluid extraction
bee pollen
scanning electron microscope
Opis:
W artykule przedstawiono wyniki badań ekstrakcji pyłku kwiatowego w postaci obnóży za pomocą ditlenku węgla w stanie nadkrytycznym. Badano wpływ sposobu przygotowania surowca na wydajność ekstrakcji oraz strukturę pojedynczych ziaren pyłku. Proces ekstrakcji realizowano przy ciśnieniu 35 MPa, w temperaturze 40°C przy przepływie CO2 wynoszącym 80 g/min przez 90 minut. Uzyskane wydajności ekstrakcji wynosiły od 0,86% ±0,25% do 1,52% ±0,2% masy obnóży przed ekstrakcją. Skład chemiczny uzyskanych ekstraktów identyfikowano za pomocą techniki chromatografii gazowej z detektorem masowym (GC-MS). Analiza GC-MS wykazała, że prawie 82 % ekstraktu stanowią związki o charakterze lipidowym, w tym 14,07 % nienasycone kwasy tłuszczowe. Badania z użyciem skaningowego mikroskopu elektronowego wykazały, że w wyniku działania nadkrytycznego ditlenku węgla nastąpiło zniszczenie zewnętrznych osłon ziaren pyłkowych.
This article presents the results of studies on the extraction of components from bee pollen by supercritical dioxide carbon. The influence of the method of bee pollen preparation and process conditions on the extraction yield and the structure of bee pollen grains was investigated. The extraction was performed at the pressure 35 MPa, temperature 40°C, CO2 flow rate 80 g/min for 90 min. The obtained extraction yields ranged from 0,86% ±0,25% to 1,52% ± 0,2% mass of bee pollen. The chemical compounds of the extracts obtained from supercritical carbon dioxide extraction were identified by using gas chromatography-mass spectrometry (GC-MS). GC-MS analysis of the extract showed that lipids accounted for approximately 82 %, including 14,07 % unsaturated fatty acids. Scanning electron microscopy studies revealed that supercritical dioxide carbon treatment was an effective way to break cell wall of bee pollen.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2017, 1; 66-70
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diversity of the floral nectaries surface of four Crataegus L. species
Zroznicowanie powierzchni nektarnikow kwiatowych czterech gatunkow z rodzaju Crataegus L.
Autorzy:
Chwil, M
Konarska, A
Weryszko-Chmielewska, E
Powiązania:
https://bibliotekanauki.pl/articles/26759.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
scanning electron microscope
nectary surface
Crataegus crus-galli
stoma
cuticle
Crataegus curvisepala
diversity
floral nectary
epidermis
Crataegus coccinea
nectary
Crataegus
Crataegus prunifolia
Rosaceae
Opis:
The performed studies focused on the surface structure of floral nectaries of four species from the following genus: C. coccinea L , C. crus-galli L, C. curvisepala Lindm and C. prunifolia (Poiret) Pers. The observations of the epidermis area were made in a scanning electron microscope (SEM). A nectary appears to be shaped like a slightly curved disk situated between the pistil style and the basal part of the stamens filaments. The nectary area of the studied species differed substantially as regards the cuticle sculpture and stomata number. The nectary secretion in Crataegus flowers proceeds through the stomata located below a level of the other epidermis cells, in the deep indents of the secretory tissue. The highest stomata number in 1 mm² nectary epidermis was recorded in C. crus-galli, C. coccínea, C. prunifolia and finally, C. curvisepala. Analyzing the nectary cuticular structure in respect of its increasing complexity (absence or presence of stripes), the investigated taxons can be ordered as following: Crataegus curvisepala, C. coccinea, C. crus-galli and C. prunifolia.
Przeprowadzone badania dotyczyły budowy powierzchni nektarników kwiatowych czterech gatunków z rodzaju Crataegus: C. coccínea L., C. crus-galli L., C. curvisepala Lindm. i C. prunifolia (Poiret) Pers. Obserwacje epidermy przeprowadzono w skaningowym mikroskopie elektronowym (SEM). Nektarnik ma kształt lekko wygiętego dysku leżącego między szyjką słupka, a nasadową częścią nitek pręcikowia. Powierzchnia epidermy nektarników badanych gatunków różniła się znacznie urzeźbieniem kuty kuli i liczbą aparatów szparkowych. Sekrecja nektaru w kwiatach Crataegus odbywała się przez aparaty szparkowe, które były położone poniżej poziomu pozostałych komórek skórki, w głębokich obniżeniach tkanki wydzielniczej. Największą liczbę szparek w mm² epidermy nektarnika stwierdzono u C. crus-galli, a następnie C. coccínea, C. prunifolia i C. curvisepala. Analizując kutykularną strukturę nektarników pod względem wzrastającego stopnia skomplikowania budowy (brak lub obecność prążków) badane taksony można uporządkować następująco: Crataegus curvisepala, C. coccínea, C. crus-galli i C. prunifolia.
Źródło:
Acta Agrobotanica; 2006, 59, 1
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The modern approach to manufacturing of carbon-rhenium nanocomposites
Autorzy:
Dobrzańska-Danikiewicz, A. D.
Wolany, W.
Powiązania:
https://bibliotekanauki.pl/articles/2201076.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
rhenium
MWCNTs
multiwall carbon nanotubes
nanocomposites
high-temperature method
SEM
scanning electron microscope
TEM
transmission electron microscopy
ren
wielościenne nanorurki węglowe
nanokompozyt
skaningowa mikroskopia elektronowa
transmisyjna mikroskopia elektronowa
Opis:
Purpose The aim of the paper is to present the high-temperature method of producing MWCNTs-Re nanocomposites, the selection of satisfactory production conditions and the presentation of the results of microscopic and spectroscopic studies of nanocomposites produced by this method. Design/methodology/approach Two methods of manufacturing carbon-rhenium nanocomposites were tested: ineffective chemical synthesis and high-temperature reduction using H2, which was proven successful and allowed the production of nanocomposites with the expected properties. The received nanocomposites were investigated using Transmission Electron Microscope (TEM), and Scanning Electron Microscope (SEM), as well as were subjected to spectroscopic examination. Findings The article presents three steps of MWCNTs-Re nanocomposites fabrication using the high-temperature method, functionalization, impregnation and reduction. As part of own work, satisfactory conditions for producing those nanocomposites using a materials science and heuristic analysis were selected. Research limitations/implications The proposed high-temperature method allows to join rhenium nanoparticles with MWCNTs permanently. It is reasonable to test in the future whether the method is also effective for other carbon nanomaterials and/or nanoparticles of other metals. Practical implications MWCNTs-Re nanocomposites can be used as sensors of gases that are harmful to the environment. It was also confirmed that the MWCNTs-Re_4 nanocomposite has catalytic properties. Originality/value The paper presents a modern approach to the manufacturing of MWCNTs-Re nanocomposites, which assumes the use of a high-temperature furnace to heat the material in a hydrogen atmosphere.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2022, 115, 2; 57--63
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Micromorphology and anatomy of fruits and seeds of bitter melon (Momordica charantia L., Cucurbitaceae)
Autorzy:
Giuliani, C.
Tani, C.
Maleci Bini, L.
Powiązania:
https://bibliotekanauki.pl/articles/57956.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
micromorphology
anatomy
fruit
seed
bitter melon zob.bitter gourd
bitter gourd
bitter squash zob.bitter gourd
balsam-pear zob.bitter gourd
Momordica charantia
Cucurbitaceae
medicinal plant
scanning electron microscope
Opis:
The aim of this paper is investigating the micromorphological properties of fruits and seeds in the food and medicinal plant Momordica charantia L. (Cucurbitaceae). A detailed anatomical description on cross-sections of immature fruits and seeds is reported for the first time. The fruit is characterized by a thin epicarp, a multi-layered mesocarp and by an inconspicuous endocarp. The seed-coat displays a pattern of organization in five tissues. These endomorphic features were compared and discussed with the results of previous investigations on other representatives of the genus Momordica. Since the structure of seed-coat is considered diacritical in the taxonomy of the genus, this report may offer a set of additional character useful for the characterization of the genus.
Źródło:
Acta Societatis Botanicorum Poloniae; 2016, 85, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The suitability of scanning electron microscopy in the evaluation of bone structure surfaces and selection of alloplastic materials for facial skeletal reconstruction
Autorzy:
Job, Katarzyna
Składzień, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1397288.pdf
Data publikacji:
2021
Wydawca:
Index Copernicus International
Tematy:
hydroxyapatite
scanning electron microscope
secondary electron detection
Opis:
Introduction: Functional and aesthetic problems can arise even from small losses created in the facial skeleton. Injuries and oncological surgeries are the most frequent causes of these losses within the facial skeleton. Advances in surgical interventions have allowed for ever-increasing degrees of resections, increasing oncological radicality as well as treatment effectiveness, providing the patient with the chance for a longer life. However, this subsequently requires the use of even more advanced reconstruction techniques in order to restore quality of life and comfort to the patient, as well as enable their return to professional and social activities. The necessity of reconstructive surgery applies not only to patients with cancer, but also to patients with impaired or failing sensory and organ function as a result of inflammatory conditions, injuries, or non-oncological surgeries. There are many available reconstruction procedures, which depend on the location of the loss, the type of tissue lost, the degree of loss and patient-dependent factors. Materials used in reconstruction surgeries may include the patients’ tissues when available, and artificial reconstruction materials otherwise. Material and methods: The analysis involved fragments of bone tissue removed during surgery. Due to the nature of the medical procedure and the inability to replant the tissue, it was regarded as medical waste. The preparations used were observed under an optical microscope and an electron scanning microscope, and a chemical analysis was performed. The chemical composition of samples was analysed using a low vacuum detector (LVD) at an accelerating voltage of 15 kV and 10 kV and at a spot size of 4 and 3.5. The observations were performed in a secondary electron (SE) detection system. Results: Observation of parameters under an optical microscope and of images obtained using an electron scanning microscope showed the presence of typical, compact bone tissue with varied surface shapes in each case (various degrees of unevenness and porosity). Chemical composition analysis confirmed the presence of compounds from the CaO-P2O5-H20 system. The Ca/P (calcium/phosphorus) ratio obtained from the chemical analysis varied from 1.33 to 2.1, and indicated a varied morphology of calcium phosphates forming the bone structures of the facial skeleton. Conclusions: 1. Calcium phosphates are characterised by excellent biocompatibility because of their chemical affinity to bone, and are ideal for the reconstruction of bone losses within the facial skeleton. 2. Biodegradable polymers have the highest functional potential among several groups of biomaterials used in tissue engineering because of their ability to be tailored individually, in addition to their high biocompatibility.
Źródło:
Polish Journal of Otolaryngology; 2021, 75, 4; 14-19
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiary topografii czynnej powierzchni foliowych taśm mikrościernych z wykorzystaniem konfokalnej laserowej mikroskopii skaningowej
Measurements of surface topography of microfinishing films with use of confocal laser scanning
Autorzy:
Kapłonek, W.
Tomkowski, R.
Zelenak, M.
Powiązania:
https://bibliotekanauki.pl/articles/155907.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
foliowa taśma mikrościerna
mikrowygładzanie
topografia powierzchni
konfokalna laserowa mikroskopia skaningowa
laserowy mikroskop pomiarowy
microfinishing film
microfinishing
surface topography
confocal laser scanning microscopy
3D measuring laser microscope
Opis:
W pracy przedstawiono zagadnienia związane z pomiarami topografii powie- rzchni narzędzi ściernych stosowanych w procesach mikro- i nanoobróbki. Ocenie poddano zestaw elastycznych foliowych taśm mikrościernych z ziarnem diamentowym o nominalnym wymiarze od 0,5 Μm do 30 Μm. W bada- niach wykorzystano zaawansowany laserowy mikroskop pomiarowy LEXT OLS4000 firmy Olympus. Analiza uzyskanych danych pomiarowych prowadzona była w dostarczonym przez producenta dedykowanym oprogramowaniu LEXT 5.0. Uzyskane rezultaty badań potwierdziły dużą użyteczność i szerokie możliwości pomiarowe wykorzystywanego mikroskopu w badaniach topografii powierzchni tego typu narzędzi ściernych.
In modern industry it is often required to improve the cleanliness and finish quality of surfaces of precise manufacturing parts. For this purpose, producers apply microfinishing [1], which permits to obtain the better quality than that obtained by different conventional finishing processes. This influences significantly the maintenance of proper operating parameters by manufactured parts. Microfinishing process is realized by means of various types of abrasive tools such as microfinishing films [2]. Manufacturers often make available incomplete or incorrect technical data concerning the stereometric characteristics of produced abrasive tools. This situation complicates the proper selection of the optimal machining parameters. In this case it is necessary to conduct investigations of the surface topography of the microfinishing film with use of precise measuring methods. This paper proves that such investigations can be carried out with use of advanced microscopy methods such as nonlocal laser scanning microscopy (CLSM) [4]. During experimental investigations a set of IDLF (ImperialŽ Diamond Lapping Film) films produced by 3M was assessed. IDLF combine diamond grains (nominal diameter from 0.5 Μm to 30 Μm), a resin bonding system and a uniform polyester film. The measurement of films were taken by a 3D measuring laser microscope LEXT OLS4000 produced by Olympus (Fig. 1.). Analysis of the obtained data was carried out in the dedicated LEXT 5.0. software provided by a system producer. The obtained results of investigations (Fig. 2.) confirmed the high usefulness and wide range of measurement of the used microscope in assessment of the surface topography of these types of abrasive tools.
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 1, 1; 37-39
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The method of obtaining the spectral characteristics of the scanning probe microscope
Sposób uzyskania charakterystyki widmowej sondy skanującej mikroskopu
Autorzy:
Kataieva, Mariia
Kvasnikov, Vladimir
Powiązania:
https://bibliotekanauki.pl/articles/2174702.pdf
Data publikacji:
2021
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
nano-measurement
digital signal processing
scanning probe microscope
Fourier transform
nano-pomiar
cyfrowe przetwarzanie sygnału
mikroskop z sondą skanującą
transformata Fouriera
Opis:
The article discusses methods and algorithms for digital processing and filtering when carrying out nano-measurements using a scanning probe microscope. The paper discusses frequency methods for improving images, in particular, the use of the Fourier transforms with various filtering methods to improve the quality of the resulting image. Stable computational algorithms have been developed for transforming discrete signals based on the Fourier transform. Methods for the interpretation of the numerical results of the discrete Fourier transform in such packages as Matlab, MathCad, Matematica are presented. It is proposed to use a window transform, developed based on the Fourier transform, which makes it possible to single out the informative features of the signal and to reduce the influence of the destabilizing factors that arise when processing signals from a scanning gold microscope in real conditions.
W artykule omówiono metody i algorytmy cyfrowego przetwarzania i filtracji podczas nano-pomiarów z wykorzystaniem mikroskopu z sondą skanującą. Badane są metody korekcji częstotliwości obrazu, w szczególności wykorzystanie transformaty Fouriera z różnymi metodami filtracji w celu poprawy jakości otrzymanego obrazu. Opracowano stabilne algorytmy obliczeniowe do konwersji sygnałów dyskretnych na podstawie transformaty Fouriera. Przedstawiono metody interpretacji numerycznych wyników dyskretnej transformaty Fouriera w takich pakietach jak Matlab, MathCad, Matematica. Proponuje się zastosowanie transformacji okienkowej opracowanej na podstawie transformaty Fouriera, która pozwala wyodrębnić charakterystykę informacyjną sygnału i zmniejszyć wpływ czynników destabilizujących występujących podczas przetwarzania sygnału z mikroskopu z sondą skanującą w warunkach rzeczywistych.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2021, 11, 2; 52--55
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Epidermal micromorphology of Hordelymus europaeus (L.) Jess. ex Harz (Poaceae)
Autorzy:
Klimko, M.
Nowinska, R.
Czarna, A.
Powiązania:
https://bibliotekanauki.pl/articles/790567.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
micromorphology
Hordelymus europaeus
Poaceae
scanning electron microscope
reproductive organ
Opis:
This paper presents the macromorphological and micromorphological characteristics of wood barley recorded in the Wielkopolska Lowland. On the basis of the collection of preserved specimens, the micromorphological features were examined under a scanning electron microscope (SEM) to assess their taxonomic value. The principal features include the size and shape of cork/silica cells, crown cells, prickles, macro-hairs and stomata as well as the morphology of long cells in vegetative and reproductive organs.
Źródło:
Steciana; 2015, 19, 2
1689-653X
Pojawia się w:
Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding Process
Autorzy:
Ko, Seok-Woo
Park, Hyeonwoo
Yoo, Il
Kim, Hansoo
Lee, Joonho
Hwang, Byoungchul
Powiązania:
https://bibliotekanauki.pl/articles/2048885.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
347 stainless steel
in-situ
high temperature
fracture behavior
welding
confocal laser scanning microscope
CLSM
Opis:
In-situ study on the high-temperature fracture behaviour of 347 stainless steel was carried out by using a confocal laser scanning microscope (CLSM). The welding microstructures of the 347 stainless steel were simulated by subjecting the steel specimen to solution and aging treatments. Undissolved NbC carbides were present within grains after solution treatment, and M23C6 carbides were preferentially formed at grain boundaries after subsequent aging treatment. The M23C6 carbides formed at grain boundaries worked as stress concentration sites and thus generated larger cracks during high-temperature tensile testing. In addition, grain boundary embrittlement was found to be a dominant mechanism for the high-temperature fracture of the 347 stainless steel because vacancy diffusion in the Cr-depleted zones enhances intergranular fracture due to the precipitation of M23C6 carbides at grain boundaries.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 1019-1022
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Confocal microscopy for investigations of agricultural materials
Autorzy:
Konstankiewicz, K.
Krol, A.
Pukos, A.
Powiązania:
https://bibliotekanauki.pl/articles/25302.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
microstructure
potato tissue
image transmission
computer image analysis
tandem scanning reflected light microscope
agricultural material
confocal microscopy
tomograph image
Źródło:
International Agrophysics; 1995, 09, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 53

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