Skocz do pozycji: 1.

Tytuł:

Auditory ossicles in Scanning Electron Microscopy

Autorzy:

Wiatr, Agnieszka
Składzień, Jacek
Wiatr, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/1397399.pdf

Data publikacji:

2020-05-12

Wydawca:

Index Copernicus International

Tematy:

middle ear surgery
ossicular chain
Scanning Electron Microscope

Opis:

Introduction: Knowledge about the physiology of a healthy middle ear is essential for understanding the activity and mechanics of the ear as well as the basics of ossiculoplasty. Trauma of the epithelial lining of the tympanic cavity as well as the ossicular chain may be the result of chronic inflammation and surgery. Depending on the observed changes of the middle ear lining, there are several types of distinguished chronic inflammatory changes: simple, with cholesteatoma, with the formation of inflammatory granulation tissue, in course of specific diseases. Purpose: The aim of the article is presentation of the microstructure and vasculature of the ossicular chain in the Scanning Electron Microscope. Particular attention is drawn to the anatomical aspects of the structure and connections of auditory ossicles as vital elements for reconstruction of the conduction system of the middle ear. Material and method: The analysis covered auditory ossicles standardly removed in accordance with the methodology of the investigated surgical procedures. The preparations were evaluated in a scanning electron microscope. Results: The exposure of bone surface promotes deep erosion. The advanced process of destruction of bone surface in the case of chronic otitis media correlates with a significant degree of damage to both the lining covering the auditory ossicles and that surrounding articular surfaces. Conclusions: (1) The ossicles in the image of the Scanning Electron Microscope are covered with lining. It passes from the surface of the ossicles to the vascular bundles, forming vascular sheaths; (2) Damage to lining continuity on the surface of the auditory ossicles promotes the rapid destruction of bone tissue in the inflammatory process; (3) The dimensions of the individual ossicles are respectively: malleus – 8.36 +/- 0.01, incus – 8.14 +/- 0.0, stapes – 3.23 +/- 0.01 mm. Behavior of the anatomical length of ossicular chain during tympanoplasty appears to be essential to maintaining adequate vibration amplitude of the conductive system of the middle ear.

Źródło:

Polish Journal of Otolaryngology; 2020, 74, 4; 1-7
0030-6657
2300-8423

Pojawia się w:

Polish Journal of Otolaryngology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Using scanning electron microscopy to study slug morphology

Autorzy:

Kaluski, T.
Gawlak, M.
Cieluch, P.
Kozlowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/84768.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich

Tematy:

scanning electron microscopy
slug
Arion lusitanicus
Arion rufus
pest
cultivated plant
animal population
animal morphology

Źródło:

Folia Malacologica; 2012, 20, 1
1506-7629

Pojawia się w:

Folia Malacologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Contrast enhancement of scanning electron microscopy images using a noncomplex multiphase algorithm

Autorzy:

Alsaygh, Zaid
Al-Ameen, Zohair

Powiązania:

https://bibliotekanauki.pl/articles/2097436.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

image enhancement
SEM images
statistical approaches
contrast enhancement

Opis:

Microscopic technology has recently flourished, allowing unparalleled viewing of microscopic elements invisible to the normal eye. Still, the existence of unavoidable constraints led on many occasions to have low contrast scanning electron microscopic (SEM) images. Thus, a noncomplex multiphase (NM) algorithm is proposed in this study to provide better contrast for various SEM images. The developed algorithm contains the following stages: first, the intensities of the degraded image are modified using a two-step regularization procedure. Next, a gamma-corrected cumulative distribution function of the logarithmic uniform distribution approach is applied for contrast enhancement. Finally, an automated histogram expansion technique is used to redistribute the pixels of the image properly. The NM algorithm is applied to natural-contrast distorted SEM images, as well as its results are compared with six algorithms with different processing notions. To assess the quality of images, three modern metrics are utilized, in that each metric measures the quality based on unique aspects. Extensive appraisals revealed the adequate processing abilities of the NM algorithm, as it can process many images suitably and its performances outperformed many available contrast enhancement algorithms in different aspects.

Źródło:

Applied Computer Science; 2022, 18, 2; 28--42
1895-3735

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

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: 5.

Tytuł:

Analysis of Fly Ash Concrete With Scanning Electron Microscopy and X-Ray Diffraction

Autorzy:

Uzbaş, Burhan
Aydın, Abdulkadir Cüneyt

Powiązania:

https://bibliotekanauki.pl/articles/103299.pdf

Data publikacji:

2019

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

fly ash
microstructure of concrete
scanning electron microscopy
x-ray diffraction
calcium hydroxide
popiół lotny
mikrostruktura betonu
skaningowa mikroskopia elektronowa
dyfrakcja rentgenowska
wodorotlenek wapnia

Opis:

In this study, the effects of using different ratios of fly ash on hydration products as well as the mechanical and microstructural properties of hardened concrete were investigated. Portland cement was replaced with 5%, 10%, 15% and 20% fly ash (FA) by weight. The microstructural properties of the obtained samples were investigated by means of X-ray diffraction (XRD) and Scanning electron microscopy (SEM). Fly ash has negative effect on 7 days concrete strength; however, it was seen that fly ash increases the compressive strength of 28 and 90 days concrete. The XRD analysis showed that the ratio of calcium hydroxide (CH), which is produced by hydration, decreases depending on the concrete age and the amount of fly ash. The SEM analysis showed that the usage of fly ash decreases gaps and increases C-S-H which is also a hydration production. When Portland cement was replaced with 10% fly ash by weight, compressive strength has increased and microstructure of concrete has improved. The reason for this is filling of gaps by fly ash and the decrease in the amount of Ca(OH)2 due to the reaction between fly ash and Ca(OH)2. Within this scope, the development in microstructure of fly ash concrete was evaluated in 90 days duration and a change of the development with compressive strength was investigated.

Źródło:

Advances in Science and Technology. Research Journal; 2019, 13, 4; 100-110
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Scanning electron microscopy of sessile graptolites
Badania osiadłych graptolitów w skaningowym mikroskopie elektronowym

Autorzy:

Urbanek, A.
Mierzejewska, G.
Mierzejewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/21526.pdf

Data publikacji:

1980

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Opis:

The surfaces of rhabdosomes in dendroid and tuboid graptolites and in Mastigograptus were investigated with SEM. In general the surfaces are remarkably smooth and essentially featureless, even around the apertures. The only exception are subparallel rollers recognized on one specimen of Dictyonema sp., which pass at places into accumulations producing a reticulated network. The evidence available indicates a foreign nature these structures which cannot be considered units of secretion of graptolite cortex. The opinion is advanced that the recent data are suggestive of collagen fibrillogenesis occuring immediately adjacent to the surface coat of epithelial cells. The lack of bandages in sessile graptolites and the lack of foreign agglutinated material on their rhabdosomes, the intimate control of fibrillogenesis by epithelial cells in extracellular secretion of collagen are all presented as evidence in favour of the membrane model of graptolite periderm secretion.
Zbadano powierzchnię rabdozomów graptolitów dendroidowych, tuboidowych i Mastigograptus sp. za pomocą skaningowego mikroskopu elektronowego. Wykazano, iż w zasadzie powierzchnie te są zupełnie gładkie, nawet w okolicach apertur. Tylko u jednego okazu Dictyonema sp. zaobserwowano na perydermie obecność niemal równoległych wałków występujących parami. Uzyskane wyniki wykluczają możliwość interpretowania tych wałków jako jednostek sekrecyjnych korteksu graptolitów. Wyraźnie gładkie, pozbawione „bandaży” powierzchnie rabdozomów graptolitów osiadłych ostro kontrasują z coeneciami Cephalodiscida, pokrytymi zazwyczaj obcymi ciałami przywierającymi do ich lepkiej powierzchni. Fakt ten może sugerować istnienie u graptolitów ochronnej warstwy z miękkich tkanek wokół rabdozomu, której obecność postuluje membranowy model sekrecji. Przedyskutowano możliwość depozycji małej ilości kolagenowego materiału szkieletalnego na powierzchniach otwartych na wpływ środowiska zewnętrznego. Wyrażono pogląd, iż dotychczasowe dane sugerują istnienie bezpośredniego związku fibryllogenezy kolagenu z powierzchnią komórek nabłonkowych. Takie fakty jak brak „bandaży” u graptolitów osiadłych, brak obcego, aglutynowanego materiału na rabdozomach oraz kontrolę fibryllogenezy przez komórki nabłonka w pozakomórkowej sekrecji kolagenu potraktowano jako przemawiające na korzyść membranowego modelu sekrecji peridermy graptolitów.

Źródło:

Acta Palaeontologica Polonica; 1980, 25, 2
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

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

/5

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Skocz do pozycji: 8.

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: 9.

Tytuł:

Surface structure changes of pathological placenta tissue observed using scanning electron microscopy - a pilot study

Autorzy:

Bobiński, Rafał
Pielesz, Anna
Waksmańska, Wioletta
Sarna, Ewa
Ulman-Włodarz, Izabela
Kania, Justyna
Mikulska, Monika
Turbiarz, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/1038615.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

hypertension
pathological pregnancy
placenta

Opis:

Structural changes within the placenta are observed in the course of pathological pregnancy. The aim of the study was to perform initial assessment of morphological features of placenta. The analysis was conducted by Scanning Electron Microscopy. Samples of placenta of women who delivered neonates appropriate for gestational age were characterized by a homogenous surface texture with natural corrugation. The surface of IUGR placenta from the group of mothers with pregnancy induced hypertension was definitely heterogeneous - noticeable swelling of tissue surface was observed. Samples from LGA group also demonstrated a number of surface bulges and heterogeneities which were, nonetheless, characterized by a certain repeatability.

Źródło:

Acta Biochimica Polonica; 2017, 64, 3; 533-535
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Scanning electron microscopy investigation of bacterial colonization of marine beach sand grains
Badania skaningowe bakterii kolonizujących ziarna piasku plaży morskiej

Autorzy:

Mudryk, Z.J.
Podgorska, B.

Powiązania:

https://bibliotekanauki.pl/articles/85221.pdf

Data publikacji:

2006

Wydawca:

Akademia Pomorska w Słupsku

Tematy:

scanning electron microscopy
bacterial colonization
sea beach
marine beach zob.sea beach
sand grain
bacteria
sand
beach

Opis:

Scanning electron microscopy was employed for the investigation of bacteria living on sand grains in a sandy marine beach in the Gulf of Gdansk (southern Baltic Sea). Bacteria colonize the sand grains; individual topography and shape of the grains were decisive for the colonization. Grains of diverse topography characterised by a great irregularity of shape were preferred, and protected surface sites were favoured. Many of the attached bacteria were found to produce polymer secretions; entire colonies attached by means of polymer nets were observed. A significant morphological diversity of bacteria in the vertical profile of the beach was determined. Bacteria inhabiting the sand grains showed the ability to reproduces.
W pracy przedstawiono wyniki badań dotyczących bakterii kolonizujących ziarna piasku plaży morskiej zlokalizowanej w rejonie Sopotu. Próby piasku pobierano z morza z odległości około 1,5 m od linii brzegowej (st. 1), z linii brzegowej (st. 2), środkowej części plaży (st. 3) oraz wydmy (st. 4). Przy użyciu mikroskopu skaningowego badano rozmieszczenie bakterii na ziarnach piasku, mechanizm ich adsorpcji do powierzchni ziaren piasku, zróżnicowanie morfologiczne i wymiary oraz ich zdolność do rozmnażania. Badania te wykazały, że bakterie maja zdolność do selektywnego kolonizowania ziaren piasku preferując głównie osłonięte i nieregularne powierzchnie (szpary, szczeliny, wklęśnięcia, fałdy, rysy). Wiele komórek bakterii kolonizujących ziarna piasku tworzyło charakterystyczne struktury włókniste, za pomocą których organizmy te trwale wiązały się z podłożem. Wykazano istotne zróżnicowanie morfologiczne bakterii na poszczególnych stanowiskach badawczych. Wiele bakterii zaabsorbowanych do ziaren piasku charakteryzowało się zdolnością do rozmnażania.

Źródło:

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2006, 10
1643-0115

Pojawia się w:

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

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

/5

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Skocz do pozycji: 12.

Tytuł:

Redescription of Strombidium coronatum (Leegaard, 1915) Kahl, 1932 (Ciliophora, Spirotricha) based on live observation, protargol impregnation, and scanning electron microscopy

Autorzy:

Agatha, Sabine

Powiązania:

https://bibliotekanauki.pl/articles/763730.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

Marine waters, morphology, Oligotrichida, stomatogenesis, taxonomy

Opis:

The oligotrichid ciliate Strombidium coronatum (Leegaard, 1915) Kahl, 1932 is redescribed from plankton samples taken in the Irish Sea, using live observation, protargol impregnation, and scanning electron microscopy. The species is characterized by a conspicuous, uniquelly shaped peristome, which is flat and roughly triangular and extends in the sagittal plane. The Irish Sea specimens measure ~ 45 × 25 µm in vivo and ~ 40 × 24 µm after protargol impregnation. The girdle kinety is equatorial, ostensibly continuous, and composed of ~ 100 dikinetids. The ventral kinety extends longitudinally on the posterior fifth of the cell and is composed of about five dikinetids. The adoral zone of membranelles is widely open and composed of ~ 18 collar and ~ 12 buccal membranelles; the collar portion is disconnected from the buccal portion. The shape and orientation of the opisthe’s adoral zone of membranelles are apparently extraordinary, i.e., the membranelles form an inverted L-shaped stripe extending longitudinally in the elongated posterior cell portion of dividers.

Źródło:

Acta Protozoologica; 2014, 53, 4
1689-0027

Pojawia się w:

Acta Protozoologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Evaluation with scanning electron microscopy of Cd, Cu, and Zn removal from aqueous solutions by ash from gasification of poultry feathers

Autorzy:

Kasinski, S.
Gusiatin, Z. M.

Powiązania:

https://bibliotekanauki.pl/articles/363182.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

ash
gasification
heavy metals
poultry feathers
SEM
sorption
popiół
zgazowanie
metale ciężkie
pióra drobiowe
sorpcja

Opis:

This study investigated the adsorption of heavy metals (Cd, Cu, Zn) as single or mixed pollutants from aqueous solutions. Ash from gasification of poultry feathers was used as the adsorbent. Batch experiments were performed at an adsorbent dosage of 1g·L-1, an adsorption time of 2h and an agitation speed of 100 rpm. In each variant, the total concentration of individual metals or their mixture was assumed to be around 500mg·L-1. The morphology and composition of ash before and after adsorption were characterized with X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectroscopy. The ash was rich in Ca, P and Si. Diffraction revealed the presence of calcium carbonate, calcium phosphate and calcium phosphate hydroxide. Microscopy confirmed the presence of Cd, Cu, and Zn on the ash surface after adsorption. Adsorption efficiency was higher for single metals than for their mixture. Spectroscopy revealed changes in ash composition that could be related to the mechanism of metal adsorption. Taking into account the high initial concentrations of metals, ash from poultry feathers is an attractive option for metal removal from wastewater.

Źródło:

Environmental Biotechnology; 2016, 12, 1; 17-25
1734-4964

Pojawia się w:

Environmental Biotechnology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

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

/5

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Skocz do pozycji: 15.

Tytuł:

Examination of deteriogenic biofilms on building facades with scanning electron microscopy
Badanie deteriogennych nalotów biologicznych na elewacjach budynków metodą elektronowej mikroskopii skaningowej

Autorzy:

Piontek, M.
Lechów, H.
Paradowska, E.
Nycz, M.

Powiązania:

https://bibliotekanauki.pl/articles/396402.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

biofilm
scanning electron microscope
SEM
facade
biocorrosion
biodeterioration
nalot biologiczny
elektronowa mikroskopia skaningowa
elewacje
biokorozja
biodeterioracja

Opis:

Destruction of facades is a complex process in which technical material changes its properties, and which is caused by depositing biological agents. The examination of biofilms from building facades is difficult because sampling for tests may result in the damage to the structure of the facade's material. Also biological analysis of the material obtained from a biofilm is arduous. Some species of microorganisms are impossible to be isolated and their pure cultures cannot be cultivated in laboratory conditions. It is multispecies cultures that most frequently develop on the surfaces of the facade's technical material. Clustered in a group, they cooperate with each other and reveal different features than single cells. It is essential to identify organisms present in the biofilms, since they may initiate deterioration processes. The aim of the research was the observation of the biofilm, collected from two facades, in a micrometer scale with the see of a scanning electron microscope.
Niszczenie elewacji to proces złożony, w którym należy brać pod uwagę zmiany właściwości materiału technicznego, wywołane przez osadzające się czynniki biologiczne. Badania nalotu biologicznego są trudne nie tylko ze względu na pobór materiału, który wiąże się z możliwością uszkodzenia struktury elewacji, ale również pod względem analizy biologicznej. Niektóre gatunki mikroorganizmów nie udaje się wyizolować i wyhodować w czystych kulturach w warunkach laboratoryjnych. Na powierzchniach materiału technicznego tworzą skupiska, najczęściej wielogatunkowe. W grupie współpracują i wykazują odmienne cechy, niż komórki żyjące w pojedynczej, w wolnej postaci. Kluczowe znaczenie ma oznaczenie organizmów, obecnych w nalotach, które mogą inicjować deteriorację. Celem badań była obserwacja zebranego nalotu biologicznego z dwóch elewacji w skali mikrometrycznej przez zastosowanie mikroskopu skaningowego.

Źródło:

Civil and Environmental Engineering Reports; 2016, No. 20(1); 79-88
2080-5187
2450-8594

Pojawia się w:

Civil and Environmental Engineering Reports

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:

The Potential of Selected Agricultural Wastes Fibers as Acoustic Absorber and Thermal Insulator Based on their Surface Morphology via Scanning Electron Microscopy

Autorzy:

Mercado, Ricky Dave T.
Ureta, Romnick M.
Templo, Reynan Jay D.

Powiązania:

https://bibliotekanauki.pl/articles/1109605.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Agricultural wastes fibers
Analytical imaging
Banana pseudustem
Coconut husk
Recycling
SEM
Sugarcane husk
Surface morphology

Opis:

Natural fibrous materials have been studied to address noise and high heat indices, but many of the existing studies about natural fibers do not sufficiently support their claims of better acoustical and heat insulating materials. Thus, this study investigated the surface morphology of easily available agricultural materials such as coconut husks, banana pseudostem and sugarcane husk for their potential as sound absorbers and thermal insulators. Fiber pads from the materials were constructed and analyzed for noise reduction coefficients, thermal insulating performance, water absorbing capacity and flame tolerance - using the methods specified in the American Society for Testing Materials. Herein, scanning electron microscopy (SEM) was applied for analytical imaging of the agricultural materials. Noise reduction coefficients (0.80 dB and 0.92 dB), (0.75d B and 0.78 dB) and (0.50 dB and 0.35 dB) each at 800 Hz and 440 Hz, and heat reductions of 2.56 °C, 1.71 °C, and 1.24 °C were obtained from coconut husk, sugarcane husk and banana pseudostem, respectively. The coconut husk also gave the highest water absorbing capacity and high flame tolerance of 56%, compared to that of sugarcane husk (49%) and banana pseudostem (32.67%). The morphology of the coconut husk, after SEM application revealed more diverse microporous cells with varying shapes and sizes compared to that of sugarcane husk and banana pseudostem. Thus, results indicate that porosity affects the noise and heat reduction indices of the fibers. The more porous the material is, the better its potential as sound absorber and thermal insulator.

Źródło:

World News of Natural Sciences; 2018, 20; 129-147
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 17.

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: 18.

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

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Skocz do pozycji: 19.

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

/5

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Skocz do pozycji: 20.

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: 21.

Tytuł:

Two New Species of Myxobolus Bütschli, 1882 (Myxozoa: Myxosporea: Bivalvulida) from Food Fishes of West Bengal, India – a Light and Scanning Electron Microscopy Study

Autorzy:

Basu, Saugata
Modak, Biplob Kr.
Haldar, Durga P.

Powiązania:

https://bibliotekanauki.pl/articles/763742.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

Myxobolus analfinus sp. n., Myxobolus debsantus sp. n., Myxozoa, India

Opis:

Two new myxozoan species – Myxobolus analfinus sp. n. and Myxobolus debsantus sp. n. are described from Heteropneustes fossilis (Bloch) and Catla-Rohu hybrid carp [Male parent fish Catla catla (Hamilton Buchanan) × Female parent fish Labeo rohita (Hamilton- Buchanan)], respectively. Spores of Myxobolus analfinus are oval with slightly acuminate anterior end and large prominent intercapsular notch. On the other hand, in Myxobolus debsantus spores are spherical to oval with intercapsular notch and posterior sutural markings. In both the myxobolid species polar capsules are unequal. The detailed light microscopic and SEM structures and measurements of these two myxozoans are given.

Źródło:

Acta Protozoologica; 2009, 48, 1
1689-0027

Pojawia się w:

Acta Protozoologica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 22.

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: 23.

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: 24.

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: 25.

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

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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

/5

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Skocz do pozycji: 27.

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: 28.

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: 29.

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: 30.

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: 31.

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: 32.

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: 33.

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: 34.

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: 35.

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: 36.

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

/5

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Skocz do pozycji: 37.

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: 38.

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

/5

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Skocz do pozycji: 39.

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

/5

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Skocz do pozycji: 40.

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: 41.

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: 42.

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

/5

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Skocz do pozycji: 43.

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: 44.

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: 45.

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

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Skocz do pozycji: 46.

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

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Skocz do pozycji: 47.

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

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Skocz do pozycji: 48.

Tytuł:

Wykorzystanie skaningowego mikroskopu elektronowego do badań malatury z kościoła w Radcze
The use of scanning electron microscopy to the study of the painting from the Church in Radcze

Autorzy:

Klimek, B.

Powiązania:

https://bibliotekanauki.pl/articles/390697.pdf

Data publikacji:

2013

Wydawca:

Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej

Tematy:

kościół
Radcza
Syczugow, W.
badania SEM-EDS
church
investigations of the polychromy
SEM-EDS

Opis:

Jednym z głównych zadań w badaniach obiektów zabytkowych jest konieczność wskazania materiałów oryginalnych i późniejszych uzupełnień, które często także mają charakter zabytkowy. Kolejne zadanie dotyczy określenia składu i budowy historycznych materiałów, rozpoznania techniki wykonania pierwotnego opracowania malarskiego. W artykule przedstawiono wstępne wyniki badań zabytkowej malatury. Wykorzystano metodę badań w mikroobszarze z zastosowaniem skaningowego mikroskopu elektronowego sprzężonego z energodyspersyjną mikrosondą elektronową EDS (SEM-EDS).
One of the main tasks in the study of historic buildings is the need to identify the original materials and extensions, which often have historic character. The next task concerns the determination of the composition and structure of the historical, diagnosis technique to develop original paint. The article presents the preliminary results of paintings. Methods were used with the scanning electron microscope was equipped with an energy dispersive X-ray spectrometer (SEM-EDS).

Źródło:

Budownictwo i Architektura; 2013, 12, 4; 95-105
1899-0665

Pojawia się w:

Budownictwo i Architektura

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

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

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Skocz do pozycji: 50.

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

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