Skocz do pozycji: 1.

Tytuł:

Investigation and vizualization of the cells grown on ceramic coating by electron microscopy techniques

Autorzy:

Karbowniczek, J.
Gruszczyński, A.
Kruk, A
Czyrska-Filemonowicz, A.

Powiązania:

https://bibliotekanauki.pl/articles/285222.pdf

Data publikacji:

2017

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

biocompatibility
biomaterials
scanning electron microscopy

Źródło:

Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 37
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:

Use of scanning electron microscopy for the study of Hoplopleura (Phthiraptera, Anoplura) lice taxonomy

Autorzy:

Kozina, P.
Izdebska, J.N.
Mierzynski, L.

Powiązania:

https://bibliotekanauki.pl/articles/5924.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Parazytologiczne

Tematy:

scanning electron microscopy
Hoplopleura
Phthiraptera
Anoplura
taxonomy

Źródło:

Annals of Parasitology; 2016, 62, Suppl.
0043-5163

Pojawia się w:

Annals of Parasitology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:

Prospective observational study of adenoidal biofilms in a paediatric population and its clinical implications

Autorzy:

Subtil, Joao
Bajanca-Lavado, Maria Paula
Rodrigues, Joao
Duarte, Aida
Reis, Lucia
Nogueira, Isabel
Jordao, Luisa

Powiązania:

https://bibliotekanauki.pl/articles/1397787.pdf

Data publikacji:

2019

Wydawca:

Index Copernicus International

Tematy:

Adenoids
biofilms
scanning electron microscopy
Haemophilus
child.

Opis:

INTRODUCTION: Adenoids are nasopharyngeal lymphoid tissue with a relevant role in host defence against infection of upper respiratory tract. Nevertheless, adenoids are also a reservoir of microorganisms that can cause infections of upper respiratory tract and otitis particularly in children. OBJECTIVE: Evaluate and compare the association between biofilm assembly on adenoids and the incidence of recurrent infections in a paediatric population submitted to adenoidectomy by either infectious or non-infectious indication. METHODS: Scanning electron microscopy was used to assess biofilms on adenoid surface; biofilm assembly in vitro was monitored by crystal violet assay; antibiotic susceptibility was assessed following EUCAST guidelines; Hinfluenzae capsular typing was performed by PCR. RESULTS: Biofilms were present in 27.4% of adenoid samples and no statistical difference was found between infectious and non-infectious groups. In vitro, the most clinically relevant bacteria, H.influenzae, S.aureus, S.pyogenes, S.pneumoniae and M.catarrhalis, were mostly moderate biofilm assemblers (71.7%). 55.3% of these bacteria were intermediate/resistant to at least one of the tested antibiotics. No association was found between the ability to assemble biofilms in vitro and the presence of biofilms on adenoids nor antibiotic resistance. All H.influenzae were characterized as non-typeable. CONCLUSION: The presence of biofilms on adenoid surface was independent from clinical sample background. Bacterial ability to assemble biofilms in vitro cannot be used to predict biofilm assembly in vivo. The lack of correlation between biofilm formation and infectious respiratory diseases found contributes to question the relevance of biofilms on the pathogenesis of infectious diseases.

Źródło:

Polish Journal of Otolaryngology; 2019, 73, 1; 22-28
0030-6657
2300-8423

Pojawia się w:

Polish Journal of Otolaryngology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:

Deformation Mechanisms and Fracture of Ni-Based Metallic Glasses

Autorzy:

Lesz, S.
Griner, S.
Nowosielski, R.

Powiązania:

https://bibliotekanauki.pl/articles/353790.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metals
transmission electron microscopy
scanning electron microscopy
fracture
shear bands

Opis:

The cracking of materials and fracture surface is of great practical and academic importance. Over the last few years the development of the fractography of crystalline alloys resulted in a useful tool for the prediction or failure analysis. Many attempts have been made to observe cracks using optical microscopy, X-ray topography and transmission electron microscopy (TEM). Of these techniques, the resolution of optical microscopy and X-ray topography is too poor. By contrast, the resolution of TEM is high enough for detailed information to be obtained. However, in order to apply TEM observations, a thin foil specimen must be prepared, and it is usually extremely difficult to prepare such a specimen from a pre-selected region containing a crack. In the present work, deformation mechanisms fracture surfaces of Ni-based metallic glass samples have been studied by specially designed experiments. In order to study the deformation mechanisms and fracture the Ni-based metallic glasses have been investigated in the tensile test. The structure and fracture surfaces after the decohesion process in tensile tests were observed using transmission electron microscope (TEM) and scanning electron microscope (SEM), respectively. The studies of structure were performed on thin foils. Moreover the investigated tape was subjected to a banding test. Then, the tape was straightened and the thin foil from the area of maximum strain was prepared. This thin foil sample was deformed before the TEM investigation to obtain local tears.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 2A; 791-796
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Diversity of labellar micromorphological structures in selected species of Malaxidinae [Orchidales]

Autorzy:

Kowalkowska, A
Margonska, H.B.

Powiązania:

https://bibliotekanauki.pl/articles/58622.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

light microscopy
scanning electron microscopy
Orchidaceae
micromorphology
Malaxidinae
pollination

Opis:

There are no papers examining the labellar micromorphology in Malaxidinae in detail. The aim of this paper is to present the results of labellar micromorphology of our studies on Malaxidinae. The micromorphology of nine species was examined and described (calli, nectaries, OP structures, concavities). These species are divided into six groups of which the lip morphology probably represents different forms of attracting and rewarding pollinators. Group one consists of Disticholiparis gregaria and Platystyliparis aurita with characteristic globular nectary and pad-like callus. The second group with Liparis nervosa has two conelike convexities. The third one is represented by Liparis sutupensis with spread lip, the basal callus, and the epichile often eroding with age. The fourth group (Stichorkis cespitosum) has a massive hypochil with basal callus and delicate epichil. The fifth group (Microstylis ophioglossoides, Dienia ophrydis) is characterized by a lip with developed lateral lobes, three deep concavities in the middle part, an erect callus, and many raphide cells.Crepidium cf. rheedii and Crepidium dryadum from the sixth group have a three-lobed lip with entire or toothed mid-lobe, basal callus, cavity surrounded by a rim and OP structures with raphide cells. We also emphasized the different way and place of nectar secretion in the subtribe and gave some suggestions about pollination strategies.

Źródło:

Acta Societatis Botanicorum Poloniae; 2009, 78, 2; 141-150
0001-6977
2083-9480

Pojawia się w:

Acta Societatis Botanicorum Poloniae

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:

Scanning electron microscopic picture of the concentration and distribution of protein structures in the seed endosperm of low and high protein varietes of rye (Secale cereale L.)
Badania porównawcze ilości i rozmieszczenia białek w komórkach endospermy ziarniaków nisko- i wysokobiałkowych odmian żyta

Autorzy:

Kubiczek, R.
Luczak, W.
Molski, B.
Moczydłowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/1399430.pdf

Data publikacji:

1989

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

rye
scanning electron microscopy
endosperm structures
protein structure

Opis:

Comparative studies of subaleurone and inner endosperm cells of dry mature caryopses from 8 low-protein and 7 high-protein varieties of rye, grown in similar conditions of isolated collection, were performed by means of scanning electron microscopy technique. Low protein varieties contained starch granules differentiated in the diameter embedded in the less dense protein matrix of the wide subaluerone region. High protein varieties, besides the larger aleurone cells had in some examples wider subaluerone layer with the dense protein matrix, which was very regular and less packed with starch granules. The inner endosperm cells of high-protein caryopses contained much more dense protein matrix all around the starch granules in contrast to low-protein caryopses, which were tightly packed with starch and had only a thin layer of protein matrix around them. Comparative pronase treatment of low- and high-protein rye caryopses confirmed the above observations. No granular protein bodies in any cells, besides the aleurone ones, could be observed.
Przeprowadzono badania porównawcze ilości i rozmieszczenia składników białkowych komórek warstw podaleuronowych i głębszych warstw endospermy w suchych, dojrzałych ziarniakach 8 niskobiałkowych i 7 wysokobiałkowych odmian żyta (tab.), wyhodowanych w 1974/75 r. w Skierniewicach i 1976/77 r. w Powsinie w identycznych warunkach izolowanej kolekcji zachowawczej z wykorzystaniem skaningowego mikroskopu elektronowego (SEM). W odmianach niskobiałkowych ziarna skrobiowe o zróżnicowanej średnicy były zatopione w grubej warstwie matrycy białkowej w komórkach cienkiej warstwy podaleuronowej (fot. 1, 2, 3). W odmianach wysokobiałkowych, oprócz zdarzających się w wypadku niektórych odmian większych komórek warstwy aleuronowej, warstwa podaleuronowa była lepiej wykształcona z dużą ilością matrycy białkowej i regularnymi i mniej upakowanymi w niej ziarnami skrobi (fot. 4, 5). Również w głębszych warstwach endospermy komórki ziarniaków odmian wysokobiałkowych zawierały więcej matrycy białkowej otaczającej ziarna skrobi w przeciwieństwie do niskobiałkowych, których komórki wypełnione są szczelnie ziarnami skrobi i zawierają niewielkie ilości białek pomiędzy nimi oraz białko cytoplazmatyczne pod ścianami komórek. Porównawcze trawienie pronazą skrawków ziarniaków odmian nisko- i wysokobiałkowych (fot.8) potwierdziło powyższe twierdzenia. Nie zauważono w komórkach innych niż aleuronowe granularnych ciał białkowych w żadnej z badanych odmian żyta.

Źródło:

Acta Alimentaria Polonica; 1989, 15(39), 2; 185-195
0137-1495

Pojawia się w:

Acta Alimentaria Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Mössbauer study of the El Hammami olivine-bronzite meteorite

Autorzy:

Zarek, W.
Popiel, E.
Tuszyński, M.
Teper, E.

Powiązania:

https://bibliotekanauki.pl/articles/147220.pdf

Data publikacji:

2004

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

meteorite
XRD
scanning electron microscopy
Mössbauer spectroscopy
kamacite

Opis:

The phase composition of the El Hammami meteorite was investigated by X-ray, magnetostatic, Mössbauer effect and environmental scanning electron microscopy methods. Performed investigations indicated that this meteorite consists of aluminosilicates, olivine (Mg,Fe)2SiO4, pyroxene (Ca,Mg,Fe)SiO3, kamacite (bcc Fe-Ni alloy) and troilite (FeS). Some inclusions of Ti and Cr were observed by scanning electron microscopy. The concentration of Ni in kamacite was determined by comparison of the Mössabauer spectra of Fe-Ni phase in the meteorite with those for synthetic bcc Fe-Ni alloys (5, 10, 25% Ni).

Źródło:

Nukleonika; 2004, 49,suppl.3; 59-62
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:

Influence of the Quenching Rate on the Structure and Magnetic Properties of the Fe-Based Amorphous Alloy

Autorzy:

Nabiałek, M.

Powiązania:

https://bibliotekanauki.pl/articles/350944.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

transmissions electron microscopy
scanning electron microscopy
amorphous matrials
free volumes
quasidislocation

Opis:

This paper presents the results of investigations into the structure, microstructure and magnetic properties of Fe₆₁Co₁₀Y₈W₁B₂₀ amorphous alloy. The alloy samples were in two physical forms: (1) plates of approximate thickness 0.5 mm (so-called bulk amorphous alloys) and (2) a ribbon of approximate thickness 35 μm (so-called classic amorphous alloy). The investigations comprised: X-ray diffractometry, Mössbauer spectrometry, transmission electron microscopy, and selected magnetic measurements; all of the investigations were carried out on samples in the as-quenched state. Analysis of the obtained SEM and TEM images, X-ray diffraction patterns, Mössbauer spectrometry results and measurements of the magnetisation in a high magnetic field facilitated collectively the detailed description of the structure of the investigated alloy, which was found to depend on the quenching speed.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 1; 439-444
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:

Influence of Milling Time on Amorphization of Mg-Zn-Ca Powders Synthesized by Mechanical Alloying Technique

Autorzy:

Lesz, S.
Kremzer, M.
Gołombek, K.
Nowosielski, R.

Powiązania:

https://bibliotekanauki.pl/articles/354717.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Mg-based powders
transmission electron microscopy
scanning electron microscopy
mechanical alloying

Opis:

Mg₆₀ Zn₃₅ Ca₅ amorphous powder alloys were synthesized by mechanical alloying (MA) technique. The results of the influence of high-energy ball-milling time on amorphization of the Mg₆₀ Zn₃₅ Ca₅ elemental blend (intended for biomedical application) were presented in the study. The amorphization process was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM). Initial elemental powders were mechanically alloyed in a Spex 8000 high-energy ball mill at different milling times (from 3 to 24 h). Observation of the powder morphology after various stages of milling leads to the conclusion that with the increase of the milling time the size of the powder particles as well as the degree of aggregation change. The partially amorphous powders were obtained in the Mg₆₀ Zn₃₅ Ca₅ alloy after milling for 13-18h. The results indicate that this technique is a powerful process for preparing Mg₆₀ Zn₃₅ Ca₅ alloys with amorphous and nanocrystalline structure.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 2; 845-851
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Microscopic analysis of the nanostructures impact on endothelial cells

Autorzy:

Kołodziejczyk, Agnieszka Maria
Kucińska, Magdalena
Jakubowska, Aleksandra
Siatkowska, Małgorzata
Sokołowska, Paulina
Kotarba, Sylwia
Makowski, Krzysztof
Komorowski, Piotr
Walkowiak, Bogdan

Powiązania:

https://bibliotekanauki.pl/articles/1844983.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nanostructures
atomic force microscopy
transmission electron microscopy
scanning electron microscopy
cell morphology

Opis:

Nowadays nanostructures are more and more often designed as carriers for drug delivery, especially to improve the drug pharmacokinetics and pharmaco-dynamics. Numerous kinds of nanostructures are considered a good prospect for medical applications thanks to their small size, acceptable biocompatibility and toxicity. Due to the fact that nanotechnology is a new field of science, every nano-scale product must be thoroughly examined regarding its toxicity to the human body. This study provides new insights into effects of exposing endothelial cells to the selected nanostructures. Dendrimers of the fourth generation (PAMAMs), multi-walled carbon nanotubes (MWCNTs) and silver nanoparticles (SNPs) were used to evaluate nanostructures influence on endothelial cells in vitro. The nanostructures were evaluated via transmission electron microscopy and dynamic light scattering technique. The cells previously exposed to the nanostructures were observed and analyzed via the atomic force microscopy and scanning electron microscopy to obtain a quantitative evaluation of the cells morphology. The presence of multi-walled carbon nanotubes and silver nanoparticles on the cells surface was confirmed by the scanning electron microscopy. Our results confirm that the surface association and/or uptake of nanostructures by the cells resulting from physicochemical and biological processes, affect the cells morphology. Morphological changes can be induced by the membrane proteins interaction with nanomaterials, which trigger a sequence of intracel-lular biological processes.

Źródło:

Engineering of Biomaterials; 2020, 23, 154; 2-8
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Microscopic analysis of the nanostructures impact on endothelial cells

Autorzy:

Kołodziejczyk, Agnieszka Maria
Kucińska, Magdalena
Jakubowska, Aleksandra
Siatkowska, Małgorzata
Sokołowska, Paulina
Kotarba, Sylwia
Makowski, Krzysztof
Komorowski, Piotr
Walkowiak, Bogdan

Powiązania:

https://bibliotekanauki.pl/articles/970974.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nanostructures
atomic force microscopy
transmission electron microscopy
scanning electron microscopy
cell morphology

Opis:

Nowadays nanostructures are more and more often designed as carriers for drug delivery, especially to improve the drug pharmacokinetics and pharmaco-dynamics. Numerous kinds of nanostructures are considered a good prospect for medical applications thanks to their small size, acceptable biocompatibility and toxicity. Due to the fact that nanotechnology is a new field of science, every nano-scale product must be thoroughly examined regarding its toxicity to the human body. This study provides new insights into effects of exposing endothelial cells to the selected nanostructures. Dendrimers of the fourth generation (PAMAMs), multi-walled carbon nanotubes (MWCNTs) and silver nanoparticles (SNPs) were used to evaluate nanostructures influence on endothelial cells in vitro. The nanostructures were evaluated via transmission electron microscopy and dynamic light scattering technique. The cells previously exposed to the nanostructures were observed and analyzed via the atomic force microscopy and scanning electron microscopy to obtain a quantitative evaluation of the cells morphology. The presence of multi-walled carbon nanotubes and silver nanoparticles on the cells surface was confirmed by the scanning electron microscopy. Our results confirm that the surface association and/or uptake of nanostructures by the cells resulting from physicochemical and biological processes, affect the cells morphology. Morphological changes can be induced by the membrane proteins interaction with nanomaterials, which trigger a sequence of intracel-lular biological processes.

Źródło:

Engineering of Biomaterials; 2020, 23, 154; 2-8
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:

Electron microscope study of NaCl- and Pb[CH3COO]2-treated kaolinite

Autorzy:

Kharitonova, G.V.
Manucharov, A.S.
Chernomorchenko, N.I.
Pavluykov, I.A.

Powiązania:

https://bibliotekanauki.pl/articles/24784.pdf

Data publikacji:

2006

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

soil treatment
scanning electron microscopy
kaolinite
lead
clay mineral

Źródło:

International Agrophysics; 2006, 20, 3
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:

Morphological Evaluation of Variously Intercalated Pre-baked Clay

Autorzy:

Ullah, H.
Imtiaz, A.

Powiązania:

https://bibliotekanauki.pl/articles/778613.pdf

Data publikacji:

2014

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

clay
alkali metal intercalation
inorganic modifier
scanning electron microscopy

Opis:

The use of porous materials is enjoying tremendous popularity and attention of the advance scientific communities due to their excellent adsorptive and catalytic activities. Clays are one of the most important candidates in the porous community which shows the above mentioned activities after modifing with a different intercalating agent. The paper is focused on the infiuence of some inorganic intercalating agents (NaOH) on the morphology of the variously intercalated clay samples. The alkali metal was used as the inorganic intercalating agent. The effect of intercalation temperature, intercalation agent concentration and intercalation time on the pre-baked clay morphology were also part of the study. Scanning electron microscopy (SEM) study was performed to evaluate the morphological changes of the resultant intercalates. Different morphological properties were improved significantly in the case of the inorganically modified clay samples. Thus, such intercalations are suggested to be effective if the clays under study are to be used for different industrial process at elevated conditions.

Źródło:

Polish Journal of Chemical Technology; 2014, 16, 2; 5-11
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Structural Aging and Degradation of Human Fingernail Plates Upon Cosmetic Agents

Autorzy:

Kulesza, S.
Bramowicz, M.
Gwoździk, M.
Wilczyński, S.
Goździejewska, A. M.

Powiązania:

https://bibliotekanauki.pl/articles/354662.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Atomic Force Microscopy
Scanning Electron Microscopy
fractal characterization
nanoscale property mapping

Opis:

The knowledge whether and how chemical species react with tissues is important because of protection against harmful factors, diagnose of dermatological diseases, validation of dermatological procedures as well as effectiveness of topical therapies. In presented work the effects of chemical agents on plates of human fingernails were studied using Atomic Force Microscopy and Scanning Electron Microscopy. Apart from that, mapping of the elastic properties of the nails was also carried out. To obtain reliable measures of spatial evolution of the surface variations, recorded images were analyzed in terms of scaling invariance brought by fractal geometry, instead of common though not unique statistical measures.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 1; 181-184
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:

Mechanical properties of Ni-Fe-Cu-P-B alloy produced by two component melt spinning (TCMS)

Autorzy:

Wojciechowska, M.
Ziewiec, K.
Kąc, S.
Prusik, K.

Powiązania:

https://bibliotekanauki.pl/articles/351728.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metallic glasses
scanning electron microscopy (SEM)
nanoindentation
transmission electron microscopy TEM
mechanical properties

Opis:

The aim of this work was to investigate the microstructure and mechanical properties of the two-component melt-spun (TCMS) alloy produced from Ni₄₀Fe₄₀B₂₀ and Ni₇₀Cu₁₀P₂₀ melts. The Ni₄₀Fe₄₀B₂₀, Ni₇₀Cu₁₀P₂₀, Ni₅₅ Fe₂₀ Cu₅ P₁₀ B₁₀ alloys were arc-melted. Then the alloys were melt-spun in the two different ways i.e.: by casting from a single-chamber crucible and from the two-chamber crucible. All of the above mentioned alloys were processed in the first way and the Ni₄₀Fe₄₀B₂₀ and Ni₇₀Cu₁₀P₂₀ were simultaneously cast on the copper roller from the two-chamber crucible. The microstructure of the alloy was studied using transmission electron microscopy (TEM), scanning electron microscopy (SEM) with energy dispersive spectrometry (EDS) and light microscopy. The mechanical properties were investigated using tensile testing and nanoindentation. The two-component melt-spun (TCMS) amorphous Ni₅₅ Fe₂₀ Cu₅ P₁₀ B₁₀ alloy present hardness, tensile strength and Young modulus on the significantly higher level than for a single phase amorphous Ni₅₅ Fe₂₀ Cu₅ P₁₀ B₁₀ alloy and slightly below the corresponding values for the Ni₄₀Fe₄₀B₂₀.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 1; 137-140
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 16.

Tytuł:

Effect of Complexing Agent on the Structural, Optical and Electrical Properties of Polycrystalline Indium Sulfide Thin Films Deposited by Chemical Bath Deposition

Autorzy:

Göde, F.
Kariper, İ.
Güneri, E.
Ünlü, S.

Powiązania:

https://bibliotekanauki.pl/articles/1031534.pdf

Data publikacji:

2017-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

scanning electron microscopy
thin film
optical constant
growth from solutions

Opis:

Indium sulfide (β-In₂S₃) thin films are synthesized by chemical bath deposition method using three different complexing agent volumes, triethanolamine (TEA) (0.30, 0.45, and 0.60 ml). The effect of complexing agent on the structural, morphological, optical and electrical properties of chemically deposited indium sulfide (β-In₂S₃) thin films have been investigated in this work. The characterization of the present films is carried out using X-ray diffraction, scanning electron microscopy, UV-vis spectroscopy and electrical measurements. The structure of the films is polycrystalline with a cubic phase of β-In₂S₃. Firstly, the band gap of the film decreases from 3.74 eV to 3.15 eV by adding 0.30 ml TEA. Then, it increases to 3.79 eV with increasing TEA. Nevertheless, previously, the refractive index of the films increases from 2.13 to 2.67 for the 0.30 mL TEA and then it decreases to the value of 2.11 with increasing TEA. Extinction coefficient, real and dielectric constant of the films are calculated using the absorption and transmittance spectra. Firstly, the electrical resistivity of the films decreases from 3.46×10⁸ Ω cm to 1.33×10⁷ Ω cm by adding 0.30 ml TEA. Then, it increases to the value of 2.16×10⁹ Ω cm with increasing TEA. Eventually, the more conductive film with worm-like morphology detected from the scanning electron microscopy is synthesized using 0.30 ml TEA. These results show that complexing agent has an important effect on the structural, morphological, optical and electrical properties of the deposited films.

Źródło:

Acta Physica Polonica A; 2017, 132, 3; 527-530
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Effect of the Powder Consolidation Method Type on the Microstructure and Selected Properties of Al2O3-Cu-Ni Composite

Autorzy:

Zygmuntowicz, J.
Wachowski, M.
Piotrkiewicz, P.
Kaszuwara, W.

Powiązania:

https://bibliotekanauki.pl/articles/351724.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

composites
Pulse Plasma Sintering
Uniaxial Powder Pressing
Scanning Electron Microscopy

Opis:

The present research is focused on the characterization of the composites from Al₂O₃-Cu-Ni system. Two methods of ceramic-metal composite forming were applied: uniaxial powder pressing and Pulse Plasma Sintering (PPS). To obtain the samples the powder mixtures containing 85 vol.% of Al₂O₃ and 15 vol.% of metal powders were used. Influence of the sintering process on microstructure and mechanical properties of the two series of the composites was analyzed in detail. The selected physical properties of samples were characterized by Archimedes immersion method. Vickers hardness and the fracture toughness of the composites was determined as well. The microstructure of the composites was characterized by XRD, SEM, EDX. Fractography investigation was carried out as well. Independently on composite production method Al₂O₃, Cu, Ni, and CuNi phases were revealed. Fractography investigation results revealed different character of fracture in dependence of fabrication method. Pulse Plasma Sintered samples were characterized by higher crack resistance and higher Vickers hardness in comparison to the specimens manufactured by uniaxial pressing.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 2; 967-974
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Papposphaera heldalii sp. nov. (Haptophyta, Papposphaeraceae) from Svalbard

Autorzy:

Thomsen, Helge Abildhauge
Egge, Jorun Karin

Powiązania:

https://bibliotekanauki.pl/articles/763513.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

Papposphaera, P. heldalii sp. nov., Papposphaeraceae, Svalbard, scanning electron microscopy

Opis:

In an attempt to establish a taxonomy for the polar contingent of lightly calcified coccolithophores, we are currently dealing with species of Papposphaera. Here we describe a new species, Papposphaera heldalii sp. nov., based on material from Svalbard. The species is unique in terms of calyx design, which is an elegant modification of the standard P. sagittifera theme, and also in terms of the absence of central area calcification in body coccoliths. The species thus occupies a further step in a sequence of five Arctic forms ranging from P. sagittifera via P. sarion, P. arctica and P. iugifera to P. heldalii showing a gradual reduction of central area calcification in body coccoliths. P. heldalii is unique also in the sense that the species has not been found during any of the major Arctic TEM nanoplankton surveys conducted during the last decades.

Źródło:

Acta Protozoologica; 2016, 55, 1
1689-0027

Pojawia się w:

Acta Protozoologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Sedimentological analysis of sandy - gravel accumulations, Serra da Estrela plateaux (Portugal)

Autorzy:

Vieira, G.T.
Mycielska-Dowgiałło, E.
Woronko, B.

Powiązania:

https://bibliotekanauki.pl/articles/295228.pdf

Data publikacji:

2003

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

wind erosion
water erosion
scanning electron microscopy
Central Cordillera
Portugal

Opis:

Sandy-gravel accumulations are frequent features on the plateaux of the Serra da Estrela II and other granitic mountains in Portugal. Their genesis has been attributed to both eolian and water processes and a detailed sedimentological study is needed to better understand the mechanisms involved. The present paper provides results obtained from the heavy mineral analysis and optical and scanning electron microscope study of samples from two sandy-gravel accumulations from the Serra da Estrela. The results indicate that the finer fractions of the original sediment have been illuviated. A well-sorted surface layer and poorly sorted subsurface of the accumulation have resulted from this process. A very short duration of eolian processes is evident from the analysis. Although wind seems to have been the responsible for the morphology of the accumulation, its action was not enough to produce significant abrasion in the surface of quartz grains.

Źródło:

Landform Analysis; 2003, 4; 99-107
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Nanopores with controlled profiles in track - etched membranes

Autorzy:

Sartowska, B. A.

Powiązania:

https://bibliotekanauki.pl/articles/146896.pdf

Data publikacji:

2012

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

nanopore
scanning electron microscopy (SEM)
surfactant
track-etched membranes (TMs)

Opis:

Track-etched membranes are porous systems consisting of a polymer foil with thin channels-pores - from surface to surface. The increasing interest in this kind of material is connected with the development of nanoporous materials with unique properties such as diode-like effects in membranes with highly asymmetrical nanopores. The materials can be used for molecular sensors and atom beam optics, development of nanocapillary bodies for modelling the transport of molecules and ions in constrained volumes. Control over pore geometry opens the way to a number of new applications of track-etch membranes (TMs). The nanopores were obtained by the ion-track etching method using surfactant-doped alkaline solutions. Control over the pore profile and dimensions was achieved by varying the alkali concentration in the etchant and the etching time. The pore geometry was characterized in detail using field-emission scanning electron microscopy (SEM). SEM images of the surfaces and cleavages of TMs with different pore morphology are shown.

Źródło:

Nukleonika; 2012, 57, 4; 575-579
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Application of computer image analysis and scanning electron microscopy in environmental engineering and waste management

Autorzy:

Szponder, D. K.
Trybalski, K.

Powiązania:

https://bibliotekanauki.pl/articles/115780.pdf

Data publikacji:

2011

Wydawca:

Fundacja na Rzecz Młodych Naukowców

Tematy:

scanning electron microscopy
computer image analysis
solid waste
environmental engineering

Opis:

Creation and refinement of modern research methods in the last century had a signifi cant impact on the dynamic development of various fields of science. Special attention deserves computer image analysis and scanning electron microscopy. These methods can be used in virtually any field of science dealing with solids. Modern methods have many applications in environmental engineering. Studies, using the above advanced testing methods are also widely used in waste management. The article presents progressive research methodology of using image analysis and scanning electron microscopy in environmental engineering and waste management. It especially presents the application of these methods to determine physical, chemical and mineralogical properties of solid waste.

Źródło:

Challenges of Modern Technology; 2011, 2, 2; 56-62
2082-2863
2353-4419

Pojawia się w:

Challenges of Modern Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Quartz grain features in modern glacial and proglacial environments: A microscopicstudy from the Russell Glacier, southwest Greenland

Autorzy:

Kalińska-Nartiša, Edyta
Lamsters, Kristaps
Karušs, Jānis
Krievāns, Māris
Rečs, Agnis
Meija, Raimonds

Powiązania:

https://bibliotekanauki.pl/articles/2042159.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Arctic
Greenland
modern glacial environment
Quartz grains
Scanning electron microscopy

Źródło:

Polish Polar Research; 2017, 38, 3; 265-289
0138-0338
2081-8262

Pojawia się w:

Polish Polar Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Biological and mechanical research of titanium implants covered with bactericidal coating

Autorzy:

Malisz, Klaudia
Świeczko-Żurek, Beata

Powiązania:

https://bibliotekanauki.pl/articles/2172010.pdf

Data publikacji:

2022

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nanometals
scanning electron microscopy
wettability
nanoindentation
antibacterial properties
mechanical properties

Opis:

Materials used in bone implants should not only be non- -toxic to the surrounding tissues, but also should promote osseointegration and minimize the risk of infection. Infections are a serious problem contributing to implantation failure. They are associated with pain, immobilization, and the necessity of reoperation. In extreme cases, they can lead to significant inflammatory changes in the bones, which, in turn, can lead to amputation and even death. After implantation, the surrounding tissues are damaged. In addition, implants are susceptible to bacterial colonization due to the lack of microcirculation. Therefore, scientists are working on antibacterial coatings to prevent the adhesion of bacteria before tissue regeneration. The paper concerns the biological and mechanical properties of titanium implants with an antibacterial coating. The Ti13Zr13Nb alloy samples were coated with hydroxyapatite (HAp) coatings using the electrophoretic deposition technique (EPD). Subsequently, the surface of the samples was modified with silver, copper, and nickel nanoparticles by the immersion method. Different titanium sample types (i.e. HAp-only and nanometals-enriched coatings) were placed in a bacterial solution for a period of one month. Each sample was examined using scanning electron microscopy (SEM), nanoindentation, nanoscratch, and contact angle tests. The significant amount of dead biofilm on the surface proves the effectiveness of antibacterial activity. The wettability assessment showed that the samples were hydrophilic. The conducted tests of mechanical properties indicate the heterogeneity of the coatings.

Źródło:

Engineering of Biomaterials; 2022, 25, 165; 17--22
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Health risk assessment in the vicinity of a copper smelter: particulate matter collected on a spider web

Autorzy:

Trzyna, Agnieszka
Rybak, Justyna
Bartz, Wojciech
Górka, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/2202388.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

air pollution
spider web
PM
Scanning Electron Microscopy
health hazard

Opis:

We used spider webs as a particulate matter (PM) sampler to assess the possible health risk to the inhabitants of Legnica city (Poland). We aimed to find out if it is a useful material and could provide reliable information. We selected two spider families (Agelenidae and Linyphiidae) whose webs structure enhances the PM accumulation. The collected particles were analysed using a Scanning Electron Microscope equipped with Energy Dispersive X-Ray (SEM-EDX) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) which provided morphological and chemical information and allowed to indicate possible sources of pollution. The results showed that PM10, the fraction of particles smaller than 10 µm, was dominated by the particles of natural origin, while fine fractions were composed of diverse anthropogenic particles, whose origin can be connected with the activity of the copper smelter and in smaller quantity with the road traffic. The carcinogenic and non-carcinogenic health risk was assessed for these pathways: inhalation, ingestion, and dermal, for children and adults. The non-carcinogenic risk was very high (Hazard Index: HI > 1) both for children (Cu, Ni, Pb, Cd) and adults (Cu, As, Pb, Cd). Moreover, high carcinogenic risk (>10-4) was found in most of the sampling points. The study shows that spider webs are useful in biomonitoring of PM and can also be used for health risk assessment. In the studied region, it was found that the possible negative impact of air pollution on human health exists.

Źródło:

Mineralogia; 2022, 53, 1; 36--50
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Characterization of Microwave Sintered Aluminium Composite Reinforced with Hydroxyapatite Extracted from Rihu Fish Scales

Autorzy:

Venkatesh, V.S.S.
Prasad, Kalapala
Deoghare, Ashish B.

Powiązania:

https://bibliotekanauki.pl/articles/27765073.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

hydroxyapatite
aluminium matrix
microwave sintering
mechanical properties
Scanning Electron Microscopy

Opis:

In this study, Hydroxyapatite (HAp) is extracted from the Rihu fish scales which are generally dumped as garbage. The aluminium composite was fabricated through the powder metallurgy technique by reinforcing HAp (0, 5, 10 and 15 wt%) as a reinforcement. The fabricated samples were sintered through microwave sintering at 530℃ for 15 min under an argon gas environment. The fabricated composites were subjected to X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) analysis to confirm the constituting elements and to describe the reinforcement dispersion in the matrix. Uniform reinforcement dispersion was observed for the composite reinforces with 5% HAp, 10% HAp particles. The mechanical characterization results reveal that the Al-10% HAp composite exhibits a microhardness value of 123 ± 3 Hv and maximum ultimate tensile strength of 263 ± 10 MPa and 299 ± 9 MPa compression strength was obtained due to the presence of a strong bond among the aluminium and HAp particles.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 2; 617--624
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

A comparison of various imaging modes in scanning electron microscopy during evaluation of selected Si/refractory sessile drop couples after wettability tests at ultra-high temperature

Autorzy:

Polkowska, A.
Warmuzek, M.
Kalarus, J.
Polkowski, W.
Sobczak, N.

Powiązania:

https://bibliotekanauki.pl/articles/391383.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa

Tematy:

scanning electron microscopy
sessile drop method
silicon
refractories
in-lens detectors

Opis:

In this work, FEI Scios^TM field emission gun scanning electron microscope (FEG SEM) equipped with a unique combination of analytical and imaging detectors was utilized to examine structure and chemistry of selected Si/ refractory couples. The couples were obtained in wettability tests performed by the sessile drop method coupled with contact heating of a refractory substrate (h-BN, SiC) at ultra-high temperature (up to 1750°C). The SEM observations were carried out on top-views of the couples, in order to evaluate surface and interfacial phenomena in Si/h-BN and Si/SiC systems. A full range of available detectors (e.g. classical Everhart-Thornley detector (ETD) or advanced in-lens detectors) working under various operation modes (secondary electrons (SE), backscattered electrons (BSE), a mixed mode), were used upon analyses in order to reveal specific features of obtained structures.

Źródło:

Prace Instytutu Odlewnictwa; 2017, 57, 4; 337-344
1899-2439

Pojawia się w:

Prace Instytutu Odlewnictwa

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 27.

Tytuł:

Study of Nonmetallic Inclusions in Aluminum–Silicon Alloys

Autorzy:

Galek, Tomasz
Łączek, Andrzej
Łysiak, Karol

Powiązania:

https://bibliotekanauki.pl/articles/176066.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

aluminum–silicon alloy
nonmetallic inclusions
scanning electron microscopy
X-ray tomography

Opis:

In this article, a study of nonmetallic inclusions introduced during the casting process of the aluminum–silicon alloy is presented. The samples were investigated using a scanning electron microscope to find the chemical composition and X-ray tomography to check the volumetric content of the non-metallic inclusions. The samples were made from AlSi₇Mg alloy, used for car wheels, with 7% weight content of Si, 89% of Al, and 0.3% of Mg. The main goal of our investigations was to find out the chemical composition of the impurities and to identify the stage of the casting process at which the impurities are introduced.

Źródło:

Advances in Manufacturing Science and Technology; 2020, 44, 1; 28-31
0137-4478

Pojawia się w:

Advances in Manufacturing Science and Technology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 28.

Tytuł:

Pathogenicity of Phoma complanata (Tode) Desm. towards angelica (Archangelica officinalis Hoffm.)
Patogeniczność Phoma complanata (Tode) Desm. dla arcydzięgla litwora (Archangelica officinalis Hoffm.)

Autorzy:

Machowicz-Stefaniak, Z.
Zalewska, E.D.
Zimowska, B.
Król, E.D.

Powiązania:

https://bibliotekanauki.pl/articles/11542857.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Tematy:

pathogenicity
Phoma complanata
fungi
angelica
Archangelica officinalis
inoculation
scanning electron microscopy

Opis:

The plants of angelica Archangelica officinalis may be colonized by various species of fungi including Phoma species. The paper concerns the fungus Phoma complanata, isolated from above-ground and underground parts of angelica in 2009–2011. Pathogenicity tests according to Koch’s postulates were carried out on angelica plants using various methods of inoculation. Observations of the infection process were made using the scanning electron microscope (SEM). Three our own isoletes and reference isolate of P. complanata were used in the study. P. complanata was found to be a facultative pathogen of angelica, which enters to the plant through stomata and wounds without creating appressoria in the top part of the germination hyphae.
Arcydzięgiel litwor (Archangelica officinalis Hoffm.) może być zasiedlany przez różne gatunki grzybów, w tym również przez grzyby Phoma sensu lato. Przeprowadzone badania dotyczą gatunku Phoma complanata wyizolowanego z nadziemnych i podziemnych części arcydzięgla w latach 2009–2011. Testy patogeniczności przeprowadzono zgodnie z postulatami Kocha, z uwzględnieniem różnych metod inokulacji. Potwierdziły one patogeniczny charakter polskich izolatów P. complanata oraz izolatu referencyjnego dla wybranych organów arcydzięgla. Obserwacje przebiegu procesu infekcji wykonano przy użyciu skaningowego mikroskopu elektronowego (SEM). Na podstawie przeprowadzonych badań P. complanata uznano za fakultatywny patogen arcydzięgla. Grzyb wnika do tkanek przez aparaty szparkowe bez tworzenia na końcu strzępki kiełkowej struktury adhezyjnej w postaci appresorium.

Źródło:

Acta Scientiarum Polonorum. Hortorum Cultus; 2014, 13, 6; 45-58
1644-0692

Pojawia się w:

Acta Scientiarum Polonorum. Hortorum Cultus

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Fractography analysis of AW-7020 alloy joints welded by FSW

Autorzy:

Dudzik, K.
Charchalis, A.

Powiązania:

https://bibliotekanauki.pl/articles/244221.pdf

Data publikacji:

2014

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

friction stir welding (FSW)
aluminum alloys
welding
fractography
scanning electron microscopy

Opis:

Technology development of Friction Stir Welding (FSW) method for joining AW-7020 aluminum alloy elements was described. Two kinds of tools were used during research: with a regular pin and with a „TRI-FLUTE” pin. Tools were with different dimensions and the following parameters changed mandrel’s rotary speed Vn [rev/min], welding speed Vz [mm/min], angle of tool deflection αz [o]. The thickness of the joining sheets was g = 12 mm. The sheets were one side milled to a thickness of 10 mm in the contact portion. Samples were tested by Charpy impact strength according to PN-EN ISO 148-1:2010. After these tests, the samples were analysed by means of fractographic examination. The tests were made with using a scanning electron microscope (SEM) Philips XL-30. The analysis has shown that there is the influence of the joining parameters and chosen tools for the possibility of occurrence welding defects in joints. Welding defects detected in the structure of joints after impact studies were: incomplete fusion, separations dissection, and cracks. During the development of friction stir welding technology, the best results, in terms of structure homogeneity and the absence of welding defects, were achieved for the tool with TRI-FLUTE pin and joining parameters: Vn = 450 rev/min, Vz = 180 mm/min, αz = 88.5 °.

Źródło:

Journal of KONES; 2014, 21, 1; 67-74
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Studies of unicellular microorganisms Saccharomyces cerevisiae by means of positron annihilation lifetime spectroscopy

Autorzy:

Kubicz, E.
Jasińska, B.
Zgardzińska, B.
Bednarski, T.
Białas, P.
Czerwiński, E.
Gajos, A.
Gorgol, M.
Kamińska, D.
Kapłon, Ł.
Kochanowski, A.
Korcyl, G.
Kowalski, P.
Kozik, T.
Krzemień, W.
Niedźwiecki, S.
Pałka, M.
Raczyński, L.
Rajfur, Z.
Rudy, Z.
Rundel, O.
Sharma, N. G.
Silarski, M.
Słomski, A.
Strzelecki, A.
Wieczorek, A.
Wiślicki, W.
Zieliński, M.
Moskal, P.

Powiązania:

https://bibliotekanauki.pl/articles/147902.pdf

Data publikacji:

2015

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

environmental scanning electron microscopy (ESEM)
free volume
inverted microscopy
positron annihilation
positronium
yeasts

Opis:

Results of positron annihilation lifetime spectroscopy (PALS) and microscopic studies on simple microorganisms, brewing yeasts, are presented. Lifetime of ortho-positronium (o-Ps) were found to change from 2.4 to 2.9 ns (longer-lived component) for lyophilized and aqueous yeasts, respectively. Also hygroscopicity of yeasts in time was examined, allowing to check how water – the main component of the cell – affects PALS parameters, thus lifetime of o-Ps were found to change from 1.2 to 1.4 ns (shorter-lived component) for the dried yeasts. The time sufficient to hydrate the cells was found below 10 hours. In the presence of liquid water, an indication of reorganization of yeast in the molecular scale was observed. Microscopic images of the lyophilized, dried, and wet yeasts with best possible resolution were obtained using inverted microscopy (IM) and environmental scanning electron microscopy (ESEM) methods. As a result, visible changes to the surface of the cell me mbrane were observed in ESEM images.

Źródło:

Nukleonika; 2015, 60, No. 4, part 1; 749-753
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Porosity assessment of suspension and saturated composite castings with the use of microscopic examinations

Autorzy:

Staude, Marek

Powiązania:

https://bibliotekanauki.pl/articles/2033595.pdf

Data publikacji:

2021

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

composites
castings
defects
porosity
suspension composite
saturated composite
light microscopy
scanning electron microscopy

Opis:

Good quality in composite castings can be confirmed primarily by their user. The producer is obliged to create a good product that meets the user’s needs that should undergo quality control. Omission of technological procedures and improper quality control may result in various defects like porosity. This paper presents the characteristics of the casting defect, namely porosity, with a particular focus on porosity in suspension and saturated metal composites. This defect is different, specific to composite castings, making its identification very difficult. The aim of the study is to detect and describe porosity in composites with the use of microscopic and submicroscopic examinations. The assessment of the porosity of the microstructure of composite castings allowed for the formulation of the following conclusions: in addition to the porosity that occurs in castings of classic materials (cast steel, cast iron, and non-ferrous metal alloys), metal composites also distinguish between primary and secondary agglomerates, leaving the reinforcement space not filled, occluded bubbles, and separated gas bubbles.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2021, 67 (139); 53--57
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Scanning electron microscopy (SEM) in the analysis of the structure of polymeric nanofiltration membranes
Skaningowa mikroskopia elektronowa (SEM) w analizie struktury polimerowych membran nanofiltracyjnych

Autorzy:

Kowalik-Klimczak, A.
Bednarska, A.
Grądkowski, M.

Powiązania:

https://bibliotekanauki.pl/articles/258006.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy

Tematy:

scanning electron microscopy
nanofiltration
polymeric membranes
skaningowa mikroskopia elektronowa
nanofiltracja
membrana polimerowa

Opis:

The authors examined the possible use of a scanning electron microscope (SEM) for polymeric nanofiltration membranes testing. The analysis of results allowed us to conclude that SEM technique is useful for the determination of the construction of “skin” and the support layer of nanofiltration polymeric membranes and that Energy-dispersive X-ray spectroscopy (EDS, EDX) provides “average” data from both layers.
W pracy zweryfikowano możliwość zastosowania skaningowego mikroskopu elektronowego do badania polimerowych membran nanofiltracyjnych. Analiza uzyskanych wyników pozwoliła na stwierdzenie, że SEM może być pomocna w określaniu budowy warstw naskórkowej i wzmacniającej polimerowych membran nanofiltracyjnych, a technika EDX dostarcza „uśrednionych” danych obejmujących obie warstwy.

Źródło:

Problemy Eksploatacji; 2016, 1; 119-128
1232-9312

Pojawia się w:

Problemy Eksploatacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Cooling Characteristic and Microstructure of Ni-Si-B-Ag Alloy

Autorzy:

Wojciechowska, M.
Ziewiec, K.
Mucha, D.

Powiązania:

https://bibliotekanauki.pl/articles/356071.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

amorphous/crystalline composite
scanning electron microscopy
X-ray diffraction
thermography
melt spinning

Opis:

The aim of this work was to investigate the possibility of obtaining an amorphous/crystalline composite starting from Ni-SiB-based powder grade 1559-40 and silver powder. The alloy was produced using arc melting of 95% wt. Ni-Si-B-based powder (1559-40) and 5% wt. Ag powder. Ingot was re-melted on a copper plate and observed while cooling using a mid-wave infra-red camera. The alloy was then melt-spun in a helium atmosphere. The microstructure of the ingot as well as the melt-spun ribbon was studied using light microscopy and scanning electron microscopy with energy dispersive spectrometry. Phase identification was performed by means of X-ray diffraction. The observations confirmed an amorphous/crystalline microstructure of the ribbon where the predominant constituent of the microstructure was an amorphous phase enriched with Ni, Si, and B, while the minor constituent was an Ag-rich crystalline phase distributed in a film along the melt-spinning direction.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 3; 1357-1360
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Intermittent Microwave-Vacuum Drying Effects on Pears

Autorzy:

Taskin, Onur
Polat, Ahmet
Izli, Nazmi
Asik, Baris B.

Powiązania:

https://bibliotekanauki.pl/articles/1369555.pdf

Data publikacji:

2019

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

microwave-vacuum drying
mineral content
protein
rehydration ratio
color
scanning electron microscopy

Opis:

In the present study, the effects of intermittent microwave-vacuum drying on the “Deveci” pear in terms of the drying kinetics, mineral content, protein content, rehydration ratio, color, energy, specific energy and microstructure were investigated. According to the drying treatments, increased microwave power (100 and 200 W) and vacuum (200 and 400 mmHg) applications provided higher drying rates and protein content. Dried pear samples had a higher mineral content than fresh samples because of the increasing dry matter content. At the higher vacuum level experiments, the energy consumption reduced and the rehydration ratio increased. Moreover, the higher microwave power caused a decrease of the L* (lightness) value. However, a regular pore size and pore distribution in all drying experiments were observed in the microstructures of microwave-vacuum-dried samples.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2019, 69, 1; 101-108
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Surface analysis and chemical composition of dust from dry dedusting system of moulding sand with bentonite using scanning electron microscopy (SEM)
Analiza morfologii powierzchni i składu chemicznego pyłów z suchego odpylania mas formierskich z bentonitem z wykorzystaniem skaningowej mikroskopii elektronowej (SEM)

Autorzy:

Bobrowski, A.
Żymankowska-Kumon, S.

Powiązania:

https://bibliotekanauki.pl/articles/391488.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa

Tematy:

bentonit
pył
odpylanie
skaningowa mikroskopia elektronowa
bentonite
dust
dedusting
scanning electron microscopy

Opis:

The article presents the results of surface morphology of dust from dry dedusting of moulding sand with bentonite and mixtures of bentonite with lustrous carbon carrier using scanning electron microscopy. The study identifies the approximate chemical composition of the dust, and compares it with the composition of starting mixtures. The mixtures of bentonite with lustrous carbon carrier from different manufacturers differ in chemical composition. The process of de- dusting should be carried out using properly selected operating parameters of the dedusting equipment. If the process of dedusting is carried out incorrectly, it can lead to the loss of valuable components.
W artykule przedstawiono wyniki badań morfologii powierzchni pyłów z suchego odpylania mas formierskich z bentonitem oraz mieszanek bentonitu z nośnikiem węgla błyszczącego z wykorzystaniem mikroskopii skaningowej. Badania pozwoliły wskazać przybliżony skład chemiczny pyłu i porównać go ze składem mieszanek wyjściowych. Mieszanki bentonitu z nośnikiem węgla błyszczącego oferowane przez ich producentów różnią się pod względem składu chemicznego. Proces odpylania mas formierskich z bentonitem powinien przebiegać przy odpowiednio dobranych parametry pracy urządzeń odpylających. Niewłaściwie prowadzony proces odpylania może doprowadzić do utraty cennych składników.

Źródło:

Prace Instytutu Odlewnictwa; 2017, 57, 3; 181-185
1899-2439

Pojawia się w:

Prace Instytutu Odlewnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Influence of hydrothermal treatment on the starch of corn grain
Wpływ obróbki hydrotermicznej na skrobię wybranych zbóż

Autorzy:

Fornal, J.

Powiązania:

https://bibliotekanauki.pl/articles/1396398.pdf

Data publikacji:

1985

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

corn
hydrothermal processes
starch
intra-grain cavities
dextrins
amylopectin
scanning electron microscopy

Opis:

The results if the conducted analysis of microstructure of corn grain using a scanning electron microscope were presented, with special consideration of changes in the morphological structure of starch granules during the manufacture of corn flakes. Attempts were also undertaken to compare the microscopic image of dextrins and amylopectins of raw materiał and product. Significant changes in the microstructure of corn grit, appearing together with the prolonged time of heat and water treatment, were demonstrated. It was stated that the presence of inra-grain cavities was not an artefact and their diameter was dependent on the time of heat and water action during the process of grit cooking. When analysing the microscopic images of dextrins and amylopectin of grit and of flakes it was noticed that differences in their structure were caused by the effect of high temperatures on starch.
Proces produkcji płatków z grysu kukurydzanego opiera się na działaniu ciepła i wody oraz sił mechanicznych, co prowadzi do nadania produktowi odpowiedniej tekstury, cech smakowo-zapachowych oraz wartości odżywczej. W niniejszej pracy, za pomocą skaningowego mikroskopu elektronowego, zbadano wpływ procesu technologicznego na mikrostrukturę grysu kukurydzanego ze szczególnym uwzględnieniem głównego jego składnika - skrobi. Na uzyskanych elektronomogramach potwierdzono występowanie w skrobi kukurydzy „zagłębień wewnątrzziarnowych", których obecność była dotąd dyskusyjna (rys. 3), a ponadto ustalono, że ich średnica zmienia się wraz z czasem parowania (rys. 4, 5, 6). Stwierdzono, że przyrost średnicy zagłębień wewnątrzziarnowych jest funkcją czasu działania ciepła i wody i ma charakter prostoliniowy. Płatkowanie grysu i opiekanie płatków powoduje dalsze zmiany strukturalne, przejawiające się zanikiem struktury komórkowej, całkowitą żelatynizacją skrobi i powstaniem licznych pęcherzyków powietrznych otoczonych cienkimi ścianami (rys. 7). Powyższe obserwacje potwierdzone zostały wynikami analizy mikroskopowej skrobi wyosobnionej z grysu o różnym stopniu uparowania (rys. 8-11). Analiza uzyskanych nomogramów dekstryn grysu i płatków oraz amylopektyny wytrąconej z wyosobnionych skrobi tych samych prób wykazała istotny wpływ obróbki hydrotermicznej na ich obrazy mikroskopowe (rys. 12-16). Dekstryny, występujące w surowcu w postaci drobin o średnicy 0,2-0,7 μm pod wpływem procesu technologicznego przekształciły się w produkcie gotowym w konglomerat kulistych struktur o znacznie większych rozmiarach i uporządkowanej, sieciowo-gąbczastej strukturze wewnętrznej. Amylopektyna mająca w skrobi surowca charakter otoczek ziarn skrobiowych, ze skrobi wyosobnionej z produktu wytrącała się jako nieuporządkowana masa. Na podstawie uzyskanych wyników uznano, że przyczyn zmian obrazu mikroskopowego analizowanych preparatów można dopatrywać się w naruszeniu naturalnego układu sił wewnątrzcząsteczkowych ziarna skrobi kukurydzy w procesie obróbki hydrotermicznej.

Źródło:

Acta Alimentaria Polonica; 1985, 11, 1; 141-151
0137-1495

Pojawia się w:

Acta Alimentaria Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Investigation of enzymatic effects on pit membranes using light and scanning electron microscopy

Autorzy:

Durmaz, S.
Yildiz, U.C.
Ozturk, M.
Serdar, B.

Powiązania:

https://bibliotekanauki.pl/articles/52338.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna

Tematy:

investigation
enzymatic effect
pit membrane
light electron microscopy
scanning electron microscopy
spruce wood
permeability
enzymatic treatment

Źródło:

Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2016, 59, 198
1644-3985

Pojawia się w:

Drewno. Prace Naukowe. Doniesienia. Komunikaty

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Skaningowa mikroskopia elektronowa

Autorzy:

Faryna, M.

Powiązania:

https://bibliotekanauki.pl/articles/274331.pdf

Data publikacji:

2014

Wydawca:

Roble

Tematy:

skaningowa mikroskopia elektronowa
Pracownia Skaningowej Mikroskopii Elektronowej
Instytut Metalurgii i Inżynierii Materiałowej PAN
scanning electron microscopy
Laboratory of Scanning Electron Microscopy
Institute of Metallurgy and Materials Science PAS

Źródło:

LAB Laboratoria, Aparatura, Badania; 2014, 19, 1; 11-14
1427-5619

Pojawia się w:

LAB Laboratoria, Aparatura, Badania

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 39.

Tytuł:

Microstructural Analysis of Concrete Using Cow Bone Ash for Alkali-Silica Reaction (ASR) Suppression

Autorzy:

Adanikin, Ariyo
Falade, Funsho
Olutaiwo, Adewale

Powiązania:

https://bibliotekanauki.pl/articles/106963.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

petrographic analysis
Scanning Electron Microscopy
Cow Bone Ash
Alkali-Silica Reaction
concrete pavement

Opis:

Concrete pavements are prone to microstructural changes and deterioration when exposed to Alkali-Silica Reaction (ASR). ASR results in strength reduction, cracking, spalling and other defects in the concrete if left unchecked. Supplementary Cementitious Materials (SCMs) such as Cow Bone Ash (CBA) however can be used to improve concrete performance, hence its use in this study. Concrete samples were prepared at replacement levels of 0%, 5%, 10%, 15%, 20% and 30% of cement with Cow Bone Ash. The concrete samples were then subjected to petrographic and Scanning Electron Microscopy (SEM) analysis. Petrographic examination shows that the minimal and least amount of ASR gels and micro cracking were observed at 15% CBA replacement of cement in the concrete samples. Scanning Electron Microscopy (SEM) analysis shows that changes in the elemental composition of the concrete samples is related to the effect of CBA which enhances adhesion in the concrete. SEM analysis show that, in general, the change in microstructure in the concrete was mainly due to the change in the arrangement of the C-H-S compounds. The microstructure analysis indicates that CBA in concrete influences the densification of the concrete at the transition zone, resulting in a much lower porosity. This results in the concrete having a tightly bound layer that repels ingress of water and thereby inhibiting cracks and gel formation as water is a contributing factor to the ASR in concrete.

Źródło:

Journal of Casting & Materials Engineering; 2020, 4, 2; 34-40
2543-9901

Pojawia się w:

Journal of Casting & Materials Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Nectary structure and nectar secretion of Echium russicum J.F.Gmel. flowers
Budowa nektarnikow i sekrecja nektaru w kwiatach Echium russicum J.F.Gmel.

Autorzy:

Chwil, M
Weryszko-Chmielewska, E

Powiązania:

https://bibliotekanauki.pl/articles/27065.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

epidermis
nectar secretion
botany
scanning electron microscopy
flower
nectary structure
Boraginaceae
Echium russicum

Opis:

In this study, the micromorphology of nectaries in Echium russicum J. F. Gmel. flowers was determined by using scanning electron microscopy (SEM) and their anatomy by using light microscopy (LM). The rate of nectar production of flowers and sugar concentration in nectar were investigated. The nectary gland is located below the ovary of the pistil. It is composed of 4 parts corresponding to the parts of the ovary. The widest regions of the nectar-producing tissue are situated by the furrows separating the adjacent parts of the ovary. Nectar is secreted through anomocytic stomata, located only in the lower part of the nectary. The stomata were distributed evenly or they formed clusters of 2-3. The average number of stomata on the surface of the whole nectary was 184. At the nectar secretion stage, open and closed, as well as not fully mature stomata were observed. The orientation of most of the stomata was parallel to the nectary base. The cuticle surface of the cells of the upper and lateral part of the nectary was smooth, whereas in the region producing stomata it showed various folds facilitating the retention of nectar. The flowers produced nectar throughout the flowering period. The weight of nectar secreted throughout the lifetime of ten flowers was, on the average, 20 mg, with the concentration of sugars of 58% and their weight reaching 17 mg.
W przeprowadzonych badaniach określono mikromorfologię nektarników w kwiatach Echium russicum J. F. Gmel. przy użyciu skaningowego mikroskopu elektronowego (SEM) oraz anatomię przy zastosowaniu mikroskopu świetlnego (LM). Zbadano obfitość nektarowania kwiatów i koncentrację cukrów w nektarze. Gruczoł nektamikowy położony jest poniżej zalążni słupka. Składa się z 4 części odpowiadających członom zalążni. Najszersze strefy tkanki nektaronośnej znajdują się przy bruzdach, oddzielających sąsiednie części zalążni. Wydzielanie nektaru odbywało się przez anomocytyczne aparaty szparkowe, położone tylko w dolnej części nektarnika. Szparki były rozmieszczone równomiernie lub tworzyły skupienia po 2-3. Średnia liczba aparatów szparkowych na powierzchni całego nektarnika wynosiła 184. W fazie sekrecji nektaru obserwowano zarówno otwarte, jak i zamknięte oraz nie w pełni dojrzałe aparaty szparkowe. Orientacja większości aparatów szparkowych była równoległa do podstawy nektamika. Powierzchnia kutykuli komórek górnej i bocznej części nektarnika była gładka, natomiast w strefie wytwarzającej szparki wykazywała różne pofałdowania, ułatwiające zatrzymywanie nektaru. Kwiaty nektarowały przez całą długość kwitnienia. Masa nektaru wydzielana przez całe życie dziesięciu kwiatów wynosiła średnio 29 mg, o koncentracji cukrów 58% i masie cukrów osiągającej 17 mg.

Źródło:

Acta Agrobotanica; 2007, 60, 1
0065-0951
2300-357X

Pojawia się w:

Acta Agrobotanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Analiza SEM czarnego tonera na wydrukach. Część I
SEM analysis of black toners on printouts. Part I

Autorzy:

Łasińska, Anna

Powiązania:

https://bibliotekanauki.pl/articles/501609.pdf

Data publikacji:

2019-11-29

Wydawca:

Agencja Bezpieczeństwa Wewnętrznego

Tematy:

toner
Canon
Dell
Epson
Ricoh
skaningowa mikroskopia elektronowa
SEM
toners
scanning electron microscopy

Opis:

W publikacji przedstawiono wyniki analizy struktury powierzchni czarnych tonerów na wydrukach, dokonanej za pomocą skaningowego mikroskopu elektronowego. Przeprowadzono testy tonerów z kilku wydruków pochodzących z 18-laserowych urządzeń drukujących czterech firm: Canon, Dell, Epson i Ricoh. Wdrożenie skaningowej mikroskopii elektronowej do kryminalistycznych badań dokumentów stworzyło nowe możliwości identyfikacji laserowych urządzeń drukujących. Uzyskane obrazy mikroskopowe pozwoliły na przyporządkowanie charakterystycznych cech tonerów do poszczególnych grup urządzeń.
black toners commercialized in Poland. A total of eighteen printouts of Canon, Dell, Epson and Ricoh manufacturer was analyzed. The analysis showed that the implementation of a much more sensitive method, such as the scanning electron microscopy (SEM) provided new opportunities for the identification of laser printing. The microscopic images obtained allowed us to allocate the characteristic features of toners to specific groups of devices.

Źródło:

Przegląd Bezpieczeństwa Wewnętrznego; 2019, 11, 21; 211-246
2080-1335
2720-0841

Pojawia się w:

Przegląd Bezpieczeństwa Wewnętrznego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

SEM analysis of black toners on printouts. Part I
Analiza SEM czarnego tonera na wydrukach. Część I

Autorzy:

Łasińska, Anna

Powiązania:

https://bibliotekanauki.pl/articles/501627.pdf

Data publikacji:

2019-11-29

Wydawca:

Agencja Bezpieczeństwa Wewnętrznego

Tematy:

toners
Canon
Dell
Epson
Ricoh
scanning electron microscopy
SEM
toner
skaningowa mikroskopia elektronowa

Opis:

This paper describes the use of scanning electron microscopy in the analysis of original black toners commercialized in Poland. A total of eighteen printouts of Canon, Dell, Epson and Ricoh manufacturer was analyzed. The analysis showed that the implementation of a much more sensitive method, such as the scanning electron microscopy (SEM) provided new opportunities for the identification of laser printing. The microscopic images obtained allowed us to allocate the characteristic features of toners to specific groups of devices.
W publikacji przedstawiono wyniki analizy struktury powierzchni czarnych tonerów na wydrukach, dokonanej za pomocą skaningowego mikroskopu elektronowego. Przeprowadzono testy tonerów z kilku wydruków pochodzących z 18-laserowych urządzeń drukujących czterech firm: Canon, Dell, Epson i Ricoh. Wdrożenie skaningowej mikroskopii elektronowej do kryminalistycznych badań dokumentów stworzyło nowe możliwości identyfikacji laserowych urządzeń drukujących. Uzyskane obrazy mikroskopowe pozwoliły na przyporządkowanie charakterystycznych cech tonerów do poszczególnych grup urządzeń.

Źródło:

Przegląd Bezpieczeństwa Wewnętrznego; 2019, 11, 21; 363-392
2080-1335
2720-0841

Pojawia się w:

Przegląd Bezpieczeństwa Wewnętrznego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Pollen morphology of Pinus uliginosa Neum. and Pinus uncinata Ramond ex DC in an experimental culture

Autorzy:

Klimko, M.
Bykowska, J.

Powiązania:

https://bibliotekanauki.pl/articles/790611.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Przyrodniczy w Poznaniu

Tematy:

pollen morphology
pollen grain
Pinus uliginosa
Pinus uncinata
experimental culture
scanning electron microscopy

Opis:

Pollen grains of Pinus uliginosa and P. uncinata were examined by light and scanning electron microscopy. The pollen grains were bisaccate and monosulcate. The corpus-saccus attachment was distinct. The pollen corpus exine sculpture was verrucate-rugulate and deeply sculptured. The surface of the tectum was with or without small grana and it was perforate. The saccus sexine ornamentation was reticulate and irregularly perforate. The tectum surface characters in the proximal and distal view of the corpus and saccus were less variable and they did not provide good criteria to identify the species under study. Among the P. uncinata from the Forest Arboretum there were differences observed in the size, shape and height of elevation and sculpture on the corpus between pollen grains of the same specimen. This study of the pollen grain morphology of the corpus and saccus provided some important new data.

Źródło:

Steciana; 2015, 19, 3
1689-653X

Pojawia się w:

Steciana

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Materiały dla jednowarstwowych ogniw paliwowych
Materials for single layer fuel cells

Autorzy:

Winiarz, P.

Powiązania:

https://bibliotekanauki.pl/articles/134696.pdf

Data publikacji:

2016

Wydawca:

ADVSEO

Tematy:

fuel cell
composite material
proton conductor
lanthanum niobate
scanning electron microscopy
x-ray diffraction

Opis:

A composite material, which may be further applied as a single layer fuel cell, was synthesized using solid state synthesis method. Composite consisted of two components. The first was a nanoceramic proton conductor – calcium doped lanthanum niobate. The second one was a nanoceramic semiconductor oxide composed of lithium, nickel and zinc oxides respectively. Structural and electrical investigations were performed on the received material. Scanning electron microscope images showed that the microstructure on the surface of this material is homogeneous. Energy dispersive X-Ray diffraction confirms that the components of the investigated composite are mixed together in a volume of material allowing to current flow through the percolation threshold. Open circuit voltage was changing during measurement from 0.8V to 0.6V. Moreover, the material did not change its structural properties during the current flow, hence it could be a good candidate to the production of single layer fuel cells.

Źródło:

Technical Issues; 2016, 4; 104-109
2392-3954

Pojawia się w:

Technical Issues

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Monotonic behaviour of typical Al-Cu-Mg alloy pre-strained at elevated temperature

Autorzy:

Tomczyk, A.
Seweryn, A.
Doroszko, M.

Powiązania:

https://bibliotekanauki.pl/articles/281485.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

creep and tensile tests
metals and alloys
scanning electron microscopy
numerical calculations
mechanical properties

Opis:

This paper presents results of monotonic tensile and creep tests conducted on typical Al-Cu-Mg alloy (commercial 2024) specimens. Tensile tests carried out at room (20°C) and elevated (100°C, 200°C, 300°C) temperatures made it possible to determine strength properties of the material (Young’s modulus, yield stress, ultimate tensile strength). Creep tests were performed at elevated temperature (100°C, 200°C and 300°C) with a constant force. In order to obtain material creep characteristics, creep-rupture tests were carried out. Then creep tests were conducted with two different strain values: one corresponding to the beginning of the secondary creep and the other corresponding to a certain value of the tertiary creep. After preliminary creep deformation at two various strain levels, specimens were cooled at ambient temperature and then subjected to monotonic tensile tests. The characteristics of the material were obtained for pre-strained specimens at different temperatures. Specimens fracture surfaces obtained as a result of tensile (at elevated and room temperature), creep and combined tests were analyzed.

Źródło:

Journal of Theoretical and Applied Mechanics; 2018, 56, 4; 1055-1068
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Structural Transition in SrZnO Laser Pulse Deposited Alloy

Autorzy:

Albrithen, H. A.
Elnaggar, M.
Ozga, K.
Szota, M.
Alahmed, Z. A.
Alanazi, A. Q.
Alshahrani, H.
Alfaifi, E.
Djouadi, M. A.
Labis, J. P.

Powiązania:

https://bibliotekanauki.pl/articles/355190.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

oxide materials
solid state alloys
structural phase transition
X-ray diffraction
scanning electron microscopy

Opis:

We have discovered a structural transition for the SrZnO alloy films from a wurtzite to a rock-salt structure, leading to a reduction in the (112̲0)/(0001) surface energy ratio. The films were grown by pulsed laser deposition using different SrO ratios, x. We have revealed that growth at a higher temperature, 750°C, resulted in a sharp 0002 peak at a low SrO content (5%), whereas growth at a higher SrO content (10%) resulted in a non-crystalline film with minute crystallites with a (112̲0) orientation. Generally the crystallinity decreased as the SrO content increased. No results obtained for the crystalline films showed any orientation of significant peaks besides the peak attributed to the (0001) plane, suggesting epitaxial growth. Optical measurements showed difference in transmission widows of alloys with different SrO percentage, and this was correlated to SrO influence on growth mode as indicated by scanning electron imaging. The studied SrZnO films, with SrO/(SrO + ZnO) ≤ 0.25, were grown by pulsed laser deposition using different SrO ratios, x. The effects of temperature and oxygen pressure during growth on the films’ structural properties were investigated. XRD results indicate that the film crystallinity was improved as the temperature and O2 pressure increased up to 650°C and 0.5 Torr, respectively.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 1; 211-216
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

The impact of calcination on changes in the physical and mechanical properties of the diatomites of the Leszczawka Member (the Outer Carpathians, Poland)

Autorzy:

Figarska-Warchoł, Beata
Rembiś, Marek
Stańczak, Grażyna

Powiązania:

https://bibliotekanauki.pl/articles/955169.pdf

Data publikacji:

2019

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

silica
thermal modification
scanning electron microscopy
Vickers microindentation hardness
porosity
apparent density
water absorption

Opis:

The work concerned the effects of the thermal treatment of diatomites from the Jawornik deposit (an example of the diatomites of the Leszczawka Member of the Polish Outer Carpathians). Five distinct lithological varieties were subjected to calcination at 600°C in ambient air. The thermal impact induced the following changes to the rocks. Their overall rock porosity increased, most distinctly in the initially softer varieties, and the internal pores of the siliceous frustules themselves usually became larger due to the initial melting of the silica phases. Most of the diatoms, quartz and feldspars cracked as a result of their brittle fracturing under compressive strain resulting from substantial and differing size changes of growing grains. Clay minerals were thermally transferred, changing their volume. The organic matter dispersed throughout the diatomites was partly oxidized and removed. At the same time, the structure of the rocks was strengthened, as confirmed by an increase in their microhardness. The microhardness of soft and porous diatomite varieties increased considerably on heating, but that of the hard and compact variety changed to a smaller degree. The increase is directly related to the content of the clay minerals. The impact of other mineral components was not detected. The calcination of lithologically diversified diatomites provided the mineral with raw material with deicing and antisliding properties. The technology of its production has been determined by the authors and submitted as a patent.

Źródło:

Geology, Geophysics and Environment; 2019, 45, 4; 269-282
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Scanning optical and electron microscopes with computer image acquisition

Autorzy:

Konstankiewicz, K.
Pukos, A.

Powiązania:

https://bibliotekanauki.pl/articles/25623.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

electron microscope
scanning optical microscope
microscopic method
tandem scanning reflected light microscope
computer image analysis
scanning electron microscopy
biological material
rotary microtome
confocal microscopy

Źródło:

International Agrophysics; 1995, 09, 4
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Cast iron component failure: A metallurgical investigation

Autorzy:

Sudhakar, K. V.

Powiązania:

https://bibliotekanauki.pl/articles/382757.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cast iron
hardness test
optical microscopy
scanning electron microscopy
fractography
żeliwo
testy twardości
mikroskopia optyczna
mikroskop skaningowy

Opis:

A fractured nutcracker was examined for determining the root cause/s for premature fracture/failure. This is one of the common tools used typically for cracking hard nuts. In this study, metallurgical failure analysis techniques namely, visual inspection, optical microscopy, SEM, and hardness tests were used in investigating the broken product. From the metallurgical analysis, it was determined that the combined effect of low carbon equivalent and presence of inclusions contributed to the sudden fracture of the nut cracking tool.

Źródło:

Archives of Foundry Engineering; 2012, 12, 2s; 67-70
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

In situ-formed bacterial exopolysaccharide (EPS) as a potential carrier for anchorage-dependent cell cultures

Autorzy:

Komorowski, Piotr
Kołodziejczyk, Agnieszka
Makowski, Krzysztof
Kotarba, Sylwia
Walkowiak, Bogdan

Powiązania:

https://bibliotekanauki.pl/articles/1844871.pdf

Data publikacji:

2021

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

bacterial exopolysaccharides
dextran- -based “microcarriers”
scanning electron microscopy
atomic force microscopy
roughness parameters
three-dimensional cell culture

Opis:

The study involved the use of a bacterial strain isolated from environmental samples which produce the biopolymer in the form of pellets in the submerged culture. This material (bacterial exopolysaccharide) is produced by bacteria of the Komogateibacter xylinus which are prevalent in the environment. The aim of this study was to characterize bacterial exopolysaccharides and commercial dextran-based “microcarriers” in terms of their roughness and cell culture effects, including the morphology and viability of the human hybridoma vascular endothelial cell line EA.hy926. The pellets were characterized using scanning electron microscopy (SEM) and atomic for¬ce microscopy (AFM). The resulting structures were used for cell culture of adherent cells (anchorage¬-dependent cells). At the same time, the cultures with commercial, dextran-based “microcarriers” were carried out for comparative purposes. After com¬pletion of the cell culture (24 hours of culture), the cellulose and commercial “carriers” were analyzed using SEM and AFM. Finally, the obtained cell dens¬ities (fluorescence labelling) and their morphological characteristics (SEM) were compared. The obtained results strongly support the applicability of bacterial exopolysaccharide (EPS) in tissue engineering to build innovative 3D scaffolds for cell culture, the more so that it is technologically possible to produce EPS as spatially complex structure

Źródło:

Engineering of Biomaterials; 2021, 24, 159; 18-23
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

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