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Tytuł:
Zmienność szyszek jodły pospolitej (Abies alba Mill.) – zróżnicowanie budowy powierzchni łusek nasiennych
Variability of silver fir (Abies alba Mill.) cones – variability of scale surface area
Autorzy:
Aniszewska, M.
Gendek, A.
Śliwińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/1293578.pdf
Data publikacji:
2017
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
drzewa lesne
jodla pospolita
Abies alba
szyszki
luski nasienne
zmiennosc
pole powierzchni
powierzchnia parowania
mikroskop elektronowy skaningowy
cone
scale
area of evaporation
scanning electron microscope
Opis:
This study was conducted on a batch of closed silver fir cones from Jawor Forest District and a mixture of scales from the seed extraction facility Grotniki. The scales were divided into three size classes corresponding to the bottom, middle and upper part of the cones and their area was measured with the Multi Scan Base v.18.03 software. Based on the sum of the inner and outer surface area of all scales, we then determined the total area of evaporation from the cones. In addition, the area of protruding scales was measured for differently sized scales from different parts of the cones. Previous studies have shown that the average outer surface of a closed cone, calculated as the sum of protruding scales, accounts for 10% of the outer surface of an open cone. Pictures of both scale surfaces with the internal seed bed and the external protrusions were taken using a scanning electron microscope. We noticed significant differences in dimension and shape of the channels and trichomes on the scale surface. On the inner side of the scales, we found a high diversity of trichomes of different lengths, whilst the outer side contained channels. Presumably, these characteristics affect the rate of water loss from the cones during desiccation and separation of the seed. In-depth knowledge on the evaporative surfaces of fir cones and scale structure will be helpful for optimizing the industrial processes of seed extraction.
Źródło:
Leśne Prace Badawcze; 2017, 78, 1
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wear characteristics and defects analysis of friction stir welded joint of aluminium alloy 6061-T6
Charakterystyka zużycia i analiza uszkodzeń złącza ze stopu aluminium 6061-T6 zgrzewanego tarciowo z przemieszaniem
Autorzy:
Kumar, R.
Chattopadhyaya, S.
Hloch, S.
Krolczyk, G.
Legutko, S.
Powiązania:
https://bibliotekanauki.pl/articles/1365830.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
friction stir welding (FSW)
wear
defect
grinding machine
field emission scanning electron microscope (FESEM)
zgrzewanie tarciowe z przemieszaniem
zużycie
uszkodzenie
szlifierka
mikroskopy polowe
Opis:
This paper deals with the wear characteristics and defects developed during friction stir welding at different process parameter of aluminium alloy (AA) 6061-T6 having thickness 6 mm. Four welded samples are prepared with rotational speed 500 rpm, 710 rpm, 1000 rpm and with welding speed of 25 mm/min & 40 mm/min. Welded samples and base material are put in wear condition under grinding machine for 120 s. Material removal is measure by taking the difference of weight before and after wear. Different types of defects and fracture are observed on the wear surface. These defects and fractures are analysed under field emission scanning electron microscope (FESEM). It is concluded that material removal from welded sample is less compared to base metal, hence wear resistance increases after friction stir welding.
Praca dotyczy charakterystyki zużycia i uszkodzeń podczas zgrzewania tarciowego z przemieszaniem stopu aluminium (AA) 6061T6 o grubości 6 mm dla zmiennych parametrów. Cztery zgrzewane próbki były wykonane z prędkością obrotową 500 obr/min, 710 obr/min, 1000 obr/min dla prędkości zgrzewania 25 mm/min i 40 mm/min. Zgrzewane próbki i materiał bazowy były poddawane zużywaniu za pomocą szlifierki w czasie 120 s. Ubytek materiału mierzono jako różnicę wagi przed i po zużywaniu. Różne rodzaje wad i pęknięć zaobserwowano na zużytej powierzchni. Wady i pęknięcia analizowano za pomocą mikroskopu polowego (FESEM). Stwierdzono, że ubytek materiału ze zgrzewanych próbek jest mniejszy w porównaniu z ubytkiem dotyczącym materiału bazowego. Zwiększa się więc odporność na zużycie po zgrzewaniu tarciowym z przemieszaniem.
Źródło:
Eksploatacja i Niezawodność; 2016, 18, 1; 128-135
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The suitability of scanning electron microscopy in the evaluation of bone structure surfaces and selection of alloplastic materials for facial skeletal reconstruction
Autorzy:
Job, Katarzyna
Składzień, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1397288.pdf
Data publikacji:
2021
Wydawca:
Index Copernicus International
Tematy:
hydroxyapatite
scanning electron microscope
secondary electron detection
Opis:
Introduction: Functional and aesthetic problems can arise even from small losses created in the facial skeleton. Injuries and oncological surgeries are the most frequent causes of these losses within the facial skeleton. Advances in surgical interventions have allowed for ever-increasing degrees of resections, increasing oncological radicality as well as treatment effectiveness, providing the patient with the chance for a longer life. However, this subsequently requires the use of even more advanced reconstruction techniques in order to restore quality of life and comfort to the patient, as well as enable their return to professional and social activities. The necessity of reconstructive surgery applies not only to patients with cancer, but also to patients with impaired or failing sensory and organ function as a result of inflammatory conditions, injuries, or non-oncological surgeries. There are many available reconstruction procedures, which depend on the location of the loss, the type of tissue lost, the degree of loss and patient-dependent factors. Materials used in reconstruction surgeries may include the patients’ tissues when available, and artificial reconstruction materials otherwise. Material and methods: The analysis involved fragments of bone tissue removed during surgery. Due to the nature of the medical procedure and the inability to replant the tissue, it was regarded as medical waste. The preparations used were observed under an optical microscope and an electron scanning microscope, and a chemical analysis was performed. The chemical composition of samples was analysed using a low vacuum detector (LVD) at an accelerating voltage of 15 kV and 10 kV and at a spot size of 4 and 3.5. The observations were performed in a secondary electron (SE) detection system. Results: Observation of parameters under an optical microscope and of images obtained using an electron scanning microscope showed the presence of typical, compact bone tissue with varied surface shapes in each case (various degrees of unevenness and porosity). Chemical composition analysis confirmed the presence of compounds from the CaO-P2O5-H20 system. The Ca/P (calcium/phosphorus) ratio obtained from the chemical analysis varied from 1.33 to 2.1, and indicated a varied morphology of calcium phosphates forming the bone structures of the facial skeleton. Conclusions: 1. Calcium phosphates are characterised by excellent biocompatibility because of their chemical affinity to bone, and are ideal for the reconstruction of bone losses within the facial skeleton. 2. Biodegradable polymers have the highest functional potential among several groups of biomaterials used in tissue engineering because of their ability to be tailored individually, in addition to their high biocompatibility.
Źródło:
Polish Journal of Otolaryngology; 2021, 75, 4; 14-19
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The modern approach to manufacturing of carbon-rhenium nanocomposites
Autorzy:
Dobrzańska-Danikiewicz, A. D.
Wolany, W.
Powiązania:
https://bibliotekanauki.pl/articles/2201076.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
rhenium
MWCNTs
multiwall carbon nanotubes
nanocomposites
high-temperature method
SEM
scanning electron microscope
TEM
transmission electron microscopy
ren
wielościenne nanorurki węglowe
nanokompozyt
skaningowa mikroskopia elektronowa
transmisyjna mikroskopia elektronowa
Opis:
Purpose The aim of the paper is to present the high-temperature method of producing MWCNTs-Re nanocomposites, the selection of satisfactory production conditions and the presentation of the results of microscopic and spectroscopic studies of nanocomposites produced by this method. Design/methodology/approach Two methods of manufacturing carbon-rhenium nanocomposites were tested: ineffective chemical synthesis and high-temperature reduction using H2, which was proven successful and allowed the production of nanocomposites with the expected properties. The received nanocomposites were investigated using Transmission Electron Microscope (TEM), and Scanning Electron Microscope (SEM), as well as were subjected to spectroscopic examination. Findings The article presents three steps of MWCNTs-Re nanocomposites fabrication using the high-temperature method, functionalization, impregnation and reduction. As part of own work, satisfactory conditions for producing those nanocomposites using a materials science and heuristic analysis were selected. Research limitations/implications The proposed high-temperature method allows to join rhenium nanoparticles with MWCNTs permanently. It is reasonable to test in the future whether the method is also effective for other carbon nanomaterials and/or nanoparticles of other metals. Practical implications MWCNTs-Re nanocomposites can be used as sensors of gases that are harmful to the environment. It was also confirmed that the MWCNTs-Re_4 nanocomposite has catalytic properties. Originality/value The paper presents a modern approach to the manufacturing of MWCNTs-Re nanocomposites, which assumes the use of a high-temperature furnace to heat the material in a hydrogen atmosphere.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2022, 115, 2; 57--63
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evaluation of the effect of carbon dioxide laser radiation on dentine tissue
Autorzy:
Ryniewicz, J.
Ryniewicz, W. I.
Loster, J. E.
Wieczorek, A.
Pytko-Polończyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/307408.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mikrostruktura
skaningowy mikroskop elektronowy
SEM
zębina
microstructure
scanning electron microscope
dentine
carbon dioxide laser
Opis:
Purpose: Tissue constitution and construction determine the scope of the structural changes that develop under laser light. The aim of this study was to analyze the effects of carbon dioxide (CO2) laser light on the structure and elemental composition of dentine. Methods: The evaluation was conducted on samples from extracted teeth. The surface of the dentine was exposed to the radiation from a CTL 1401 CO2 laser (Centre of Laser Technology, Poland). The radiation and frequency parameters were as follows: group I with 5 W and 1 Hz, group II with 10 W and 1 Hz, group III with 5 W and 5 Hz, and group IV with 10 W and 5 Hz. The altered dentine structure was macroscopically and microscopically evaluated using a Nova NanoSEM 200 Scanning Electron Microscope (FEI Europe) with integrated microanalysis X-ray system for elemental analysis in points. Results: There were significant differences between groups in the macro- and microstructure of laser defects. Conclusions: CO2 laser radiation causes irreversible, destructive changes in dentine. The structural dentine lesions developed under the influence of the CO2 laser radiation may hinder proper adhesion of bonding systems with the damaged tissue. Laser defects in the structure should be treated like defects of noncarious origin requiring preparation and filling with composite materials in accordance with the procedures.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 1; 181-188
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Beam Current Considerations in SEM Accordance to Mirror Effect Phenomenon
Autorzy:
Al-Obaidi, H. N.
Khaleel, I. H.
Powiązania:
https://bibliotekanauki.pl/articles/411880.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
scanning electron microscope
Electron Beam Current
Electron Mirror Images
Opis:
A theoretical investigation have been presented to exploring the influence of electrons beam current on the electron mirror image deduced inside the scanning electron microscope (SEM). A rough mathematical expression for the electric potential that associated with electron beam is derived. The results clearly shows that the beam current could be used to enhance or conversely deteriorate the phenomena of mirror effect. So this work procedure may consider to be tool controllable of this phenomena for investigation purposes.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 1; 70-75
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Coating of Cyclotetramethylenetetranitramine (HMX) Crystals with the Insensitive High Explosive 1,3,5-Triamino-2,4,6-trinitrobenzene (TATB)
Autorzy:
Nandi, A. K.
Ghosh, M.
Sutar, V. B.
Pandey, R. K.
Powiązania:
https://bibliotekanauki.pl/articles/358361.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
surface coating
cyclotetramethylenetetranitramine
1,3,5-triamino-2,4,6-trinitrobenzene
1,3,5-trichloro-2,4,6-trinitrobenzene
scanning electron microscope
Opis:
A method to crystallize the thermally stable, insensitive high explosive, 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) onto the surface of another high explosive cyclotetramethylenetetranitramine (HMX) crystal is described. Amination of 1,3,5-trichloro-2,4,6-trinitrobenzene (TCTNB) in toluene produces TATB which is precipitated by a reactive crystallization process. When the reaction is carried out in the presence of HMX, TATB crystals are found to be deposited onto the HMX crystal surface. This phenomenon was utilized to obtain in situ surface coating of HMX crystals with TATB. Both the conventional amination and the sonochemical amination methods, using dry ammonia (NH3) gas and ammonium hydroxide (NH 4 OH) respectively as the aminating agents, were studied. The coated materials were characterized by Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC), Simultaneous Thermal Analysis (STA) and sensitivity tests. The results were compared with those of the virgin materials. Sonochemical amination provided a uniform coating of the HMX crystals. Coated HMX has shown substantial friction insensitivity gain as compared to uncoated HMX. However there is a drop in impact insensitivity in the coated materials.
Źródło:
Central European Journal of Energetic Materials; 2012, 9, 2; 119-130
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Somatic embryogenesis of a tree fern Cyathea delgadii Sternb.: achievements and prospects
Autorzy:
Mikula, A.
Grzyb, M.
Pozoga, M.
Tomiczak, K.
Domzalska, L.
Rybczynski, J.J.
Powiązania:
https://bibliotekanauki.pl/articles/951310.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
somatic embryogenesis
tree fern
Cyathea delgadii
electron microscope
transmissiom electron microscope
scanning electron microscope
zygotic embryogenesis
symplasmic communication
fluorochrome
confocal microscopy
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SEM Automated Mineralogy applied for the quantification of mineral and textural sorting in submarine sediment gravity flows
Zastosowanie zautomatyzowanej mineralogii SEM do kwantyfikacji mineralnego i teksturalnego wysortowania osadów podmorskich spływów grawitacyjnych
Autorzy:
Pszonka, Joanna
Schulz, Bernhard
Powiązania:
https://bibliotekanauki.pl/articles/2173819.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
scanning electron microscope
SEM automated mineralogy
mineral liberation analysis
depositional processes
sediment sorting
submarine gravity flows
skaningowy mikroskop elektronowy
zautomatyzowana mineralogia SEM
proces depozycyjny
sortowanie osadów
podmorskie spływy grawitacyjne
Opis:
SEM Automated Mineralogy (SEM-AM) is an analytical system based on a scanning electron microscope (SEM) with backscattered electron detector and an energy dispersive X-ray spectrometer (EDS). This automated tool enables to quantify mineralogy, size and geometry of solid matter components. The paper presents a SEM-AM application in detection of mineralogical and textural sediment sorting on the example of a submarine gravity flow record from the Cergowa sandstones (Lower Oligocene) in the Polish Outer Carpathians. Analysis of high quality backscattered electron (BSE) imagery in combination with EDX spectra discriminates mineral phases in polished samples. These data are then processed by the mineral liberation analysis (MLA) software in order to extract size and shape information, and combine, compare and group components for further examination. Automated data extraction provides highly representative measurement statistics devoid of manual work bias. The Cergowa sandstones were prepared for the analysis as non-granular samples in coated thin sections and granular samples in epoxy mounts. The former samples provide mineralogical data whereas the latter additionally generate textural parameters, both essential in interpretation of variability of flow competence. Comparisons between samples from an individual bed and between different beds of the measured sections give insights into the spatial and temporal flow development at a given locality. On the other hand, a comparison of different sections and regions of the formation will provide basis for the reconstruction of submarine flow events throughout the sedimentary basin and contribute to the characterisation of the provenance areas. Highly detailed quantitative data generated by this procedure have great potential in helping to recognise complex relationships between mineralogical and textural sorting by depositional processes.
Zautomatyzowana mineralogia SEM jest analitycznym systemem bazującym na skaningowym mikroskopie elektronowym (SEM) wyposażonym w detektor elektronów wstecznie rozproszonych oraz spektrometr dyspersji energii (EDX). To zautomatyzowane narzędzie umożliwia kwantyfikację mineralogii, wielkości i geometrii komponentów ciał stałych. W artykule przedstawiono zastosowanie zautomatyzowanej mineralogii SEM w analizie mineralogicznego i teksturalnego sortowania osadów zdeponowanych przez podmorskie spływy grawitacyjne, na przykładzie piaskowców cergowskich (dolny oligocen) z polskich Karpat zewnętrznych. Analiza obrazów wysokiej rozdzielczości, generowanych przez elektrony wstecznie rozproszone (BSE), w połączeniu z zarejestrowanymi widmami EDX, pozwala określić fazy mineralne występujące w badanych próbkach. Te dane są następnie przetwarzane przez oprogramowanie Mineral Liberation Analysis (MLA) w celu ekstrakcji informacji o wielkości i kształcie komponentów, a także łączeniu, porównywaniu i grupowaniu wygenerowanych informacji do dalszych badań. Zautomatyzowana ekstrakcja danych dostarcza wysoce reprezentatywnych statystyk pomiarowych pozbawionych błędu pracy ręcznej. Piaskowce cergowskie zostały przygotowane do analizy jako zgłady w formie płytek cienkich oraz zatopione w żywicy wyseparowane ziarna. Pierwszy rodzaj próbek dostarcza danych o składzie mineralogicznym, natomiast drugi rodzaj dodatkowo pozwala wygenerować parametry teksturalne, oba istotne w interpretacji zmienności kompetencji podmorskich spływów grawitacyjnych. Porównania pomiędzy próbkami z tej samej warstwy oraz z różnych warstw profilu dają wgląd w przestrzenny i czasowy rozwój przepływu w danym miejscu. Natomiast porównanie próbek z różnych profilów i regionów formacji dostarcza informacji do rekonstrukcji podmorskich przepływów grawitacyjnych w basenie sedymentacyjnym i przyczynia się do charakterystyki obszarów proweniencji. Wysoko szczegółowe dane ilościowe generowane w MLA mają duży potencjał w rozpoznaniu złożonych zależności pomiędzy mineralogicznym i teksturalnym sortowaniem przez procesy depozycyjne.
Źródło:
Gospodarka Surowcami Mineralnymi; 2022, 38, 4; 105--131
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scanning television optical microscope for diagnostics of microobjects in medicine
Skanujący telewizyjny optyczny mikroskop dla diagnostyki mikroobiektów w medycynie
Autorzy:
Prudyus, I.
Shkliarskyi, V.
Matiieshyn, Y.
Pedan, A.
Balanyuk, Y.
Vasylyuk, V.
Powiązania:
https://bibliotekanauki.pl/articles/328479.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
scanning microscope
electron beam tube
microobject
diagnostics
mikroskop skanujący
lampa kineskopowa
makroobiekt
diagnoza
Opis:
Scanning television optical microscope (SТОМ) developed by authors will enable to diagnose microobjects which size exceeds 0,1 microns. Diagnostics can be carried out by supervision over researched microobjects during influence on them of various reagents and catalysts, and also definition of parameters of microobjects: the sizes, speed of movement, acceleration, growth rate, change of density, etc. Ways of the scanning television microscope construction which can be used for the biological microobjects research are analyzed. The Microscope capabilities are expanded due to a raster formation in television and little-frame modes. Ways of the raster size change are offered at preservation of the microobject image resolution.
Skanujący telewizyjny optyczny mikroskop (STOM) skonstruowany przez autorów pozwoli na diagnozowanie mikroobiektów których rozmiar nie przekracza 0,1 mikrona. Diagnoza może być przeprowadzona poprzez obserwowanie badanych mikroobiektów podczas oddziaływania różnych reagentów i katalizatorów, oraz w celu określenia parametrów fizycznych mikroobiektów: wielkości, prędkości, przyspieszenia ruchu, tempa wzrostu, zmian gęstości itp. Sposób skonstruowania skanującego telewizyjnego optycznego mikroskopu powala na badania i analizy mikroobiektów biologicznych. Możliwości mikroskopu zostały rozszerzone w stosunku do skanowania rastrowego i trybów mało-kadrowych. Zaproponowane zostały sposoby rastrowej zmiany rozmiaru ekranu przy zachowaniu rozdzielczości zdjęcia mikroobiektu.
Źródło:
Diagnostyka; 2013, 14, 3; 41-44
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scanning optical and electron microscopes with computer image acquisition
Autorzy:
Konstankiewicz, K.
Pukos, A.
Powiązania:
https://bibliotekanauki.pl/articles/25623.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
electron microscope
scanning optical microscope
microscopic method
tandem scanning reflected light microscope
computer image analysis
scanning electron microscopy
biological material
rotary microtome
confocal microscopy
Źródło:
International Agrophysics; 1995, 09, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary investigation of mineralogy and chemistry of peats from the Kietrz site, southern Poland
Autorzy:
Skreczko, S.
Nadłonek, W.
Szopa, K.
Powiązania:
https://bibliotekanauki.pl/articles/100771.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Śląski. Wydział Nauk o Ziemi
Tematy:
peat
mineralogy
scanning electron microscope
SEM
pH
total sulphur
TS
carbon content
torf
mineralogia
mikroskop elektronowy
siarka
zawartość
węgiel
Opis:
Peat bog deposits provide a very important record of past environmental conditions, preserving biotic and abiotic processes that occurred in the vicinity of the bog. In this study, we examined three peat bog profiles from Kietrz, located in the micro-region of the Głubczycki Plateau, southern Poland. The objective of this study was to determine the type of peat occurring in this area, through examination of its mineral composition, and evaluation of the total carbon and total sulphur content. In addition, we measured peat reaction (pH) and identified floral and faunal components occurring within the peat deposits. The peat comprises primarily of fragments of fossilized plant and mollusk remains, as well as minerals (calcium sulphates, calcium carbonates, and pyrites). Additionally, an assemblage of iron oxides/hydroxides, Kfeldspar, apatite, zircon, and quartz grains was identified. A neutral and/or light alkalinity was recorded for the peat deposits, but an increase in acidity (pH) with increasing depth through each peat profile was also recorded. We observed a positive correlation between the pH and chemical composition of deposits, where a significant presence of calcite is associated with higher reaction (higher pH), whilst a lower pH is characteristic for sediments where carbonates are rare. The recognized species of mollusks are typical of shallow, fresh-water stagnant reservoirs with a high fluctuation of water level.
Źródło:
Contemporary Trends in Geoscience; 2015, 4, 1; 14-25
2299-8179
Pojawia się w:
Contemporary Trends in Geoscience
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plastic Deformation, Mechanical and Adhesive Properties of Bio-Plastic Material
Autorzy:
Raghs, Hamdi Abdulhamid
Powiązania:
https://bibliotekanauki.pl/articles/102637.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Scanning Electron Microscope (SEM)
Computer Numerical Control (CNC)
heat shape mould
mechanical properties of bio plastic
waste management
adhesives behaviour
biodegradable polymers
skaningowy mikroskop elektronowy
komputerowe sterowanie numeryczne
foremka kształtowa
właściwości mechaniczne bioplastiku
gospodarka odpadami
zachowanie klejów
polimery biodegradowalne
Opis:
Given the added need for eco-friendly material, environmental scientists are constantly on the look-out for new solutions. In this respect, biodegradable polymer proved to be a promising one. The Selfix material, being a bioplastic, is biodegradable and, unlike other plastic products, can be considered feasible for the industry as a smart material capable of biodegrading at the end of its life cycle. Using Selfix, waste paper can be re-used, thus eliminating the need for recycling and helping to reduce the CO2 emissions. The present paper develops 3D models with Selfix material to offer benefits such as easy-cutting and sticking properties in a way that can be educational for children. We examine the mechanical properties of this material using tensile testing, laser-cutting, CNC milling, surface roughness and also scanning electron microscope or SEM.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 3; 1-15
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New data on seed coat micromorphology of several Impatiens spp. from Northeast India
Autorzy:
Rewicz, A.
Adamowski, W.
Borah, S.
Gogoi, R.
Powiązania:
https://bibliotekanauki.pl/articles/2130702.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Balsaminaceae
micromorphology
scanning electron microscope (SEM)
seed
surface
taxonomy
Opis:
This study aimed to analyze the seed coat structure of nine species from the genus Impatiens from Northeast India. A review of the available literature showed a scarcity of data on seed sizes and shapes, as well as a complete lack of information on the ultrastructure of seeds from five taxa of Impatiens determined with a scanning electron microscope (SEM). Photographs of the surface structure of seeds from the analyzed species were taken using an SEM and, from these, we measured the length and width of the seeds. The results showed differences in the seed ultrastructure and metric traits within the studied taxa. Based on the ornamentation of the epidermal cells, we distinguished three morphological types: protrusive, granulate, and reticulate. The seeds of the investigated species had ellipsoid, subellipsoid, or subspheroid shapes. Their lengths and widths ranged from 1.2 to 3.6 mm and 0.7 to 2.1 mm, respectively. The results of the study showed that the ultrastructures of Impatiens seeds are different among taxa and for some species can be used as a diagnostic character for their identification.
Źródło:
Acta Societatis Botanicorum Poloniae; 2020, 89, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mycoremediation of Heavy Metals Contaminated Soil by Using Indigenous Metallotolerant Fungi
Autorzy:
Akram, Muhammad Bilal
Khan, Ibrar
Ur Rehman, Mujaddad
Sarwar, Abid
Ullah, Najeeb
ur Rahman, Shafiq
Aziz, Tariq
Alharbi, Metab
Alshammari, Abdulrahman
Alasmari, Abdullah F.
Powiązania:
https://bibliotekanauki.pl/articles/27315654.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Mycoremediation
Heavy Metals Contaminated Soil
Korangi Industrial Estate
FTIR
Fourier Transform Infrared Spectroscopy
SEM
Scanning Electron Microscope
Opis:
The present study was aimed to identify the indigenous fungal strains which could possibly be applied to the bioremediation of heavy metal-contaminated soil. The contaminated soil samples of Korangi Industrial Estate Karachi were found to have total concentration of Cu 1.044 mgL1 , and Pb 0.631 mgL–1. A total of eight indigenous strains of the fungus were isolated and screened for bioremediation capacity from heavy metals-contaminated soil. For the bioremediation of Lead (Pb) these same indigenous eight fungal strains were used for biological remediation. All the fungal isolated with enhanced bioremediation capability were through phenotypic and genotypical characterization. The topology of the phylograms established that the fungal isolates used in this study were allocated to: K1 (Penicillium notatum), K2 (Aspergillus parasiticus), K3 (Aspergillus fumigatus), K4 (Aspergillus flavus), K5 (Aspergillus terries), K6 (Fusarium solani), K7 (Penicillium chrysogenum), K8 (Aspergillus niger), K9 (Penicillium piceum) and K10 (Penicillium restrictum). Thus, K8 fungal isolate was found to be more efficient with maximum bioremediation capacity, for copper and lead removal efficiency, and selected for FTIR and SEM to find out the uptake of Cu and Pb which of the functional groups are involved, and further to detect the effects of bioleaching of both heavy metals on to the surface of K8 fungus biomass. The current study indicates that indigenous fungal isolates could be used with high potency to remediate or clean up the heavy metals-contaminated soil either by the technique of in situ or ex-situ bioremediation.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 3; 1--13
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 36

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