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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:
A method of magnetic field measurement in a scanning electron microscope using a microcantilever magnetometer
Autorzy:
Orłowska, Karolina
Mognaschi, Maria E.
Kwoka, Krzysztof
Piasecki, Tomasz
Kunicki, Piotr
Sierakowski, Andrzej
Majstrzyk, Wojciech
Podgórni, Arkadiusz
Pruchnik, Bartosz
di Barba, Paolo
Gotszalk, Teodor
Powiązania:
https://bibliotekanauki.pl/articles/220725.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
scanning electron microscope
magnetometry
microcantilever
Opis:
Scanning electron microscopy (SEM) is a perfect technique for micro-/nano-object imaging [1] and movement measurement [2, 3] both in high and environmental vacuum conditions and at various temperatures ranging from elevated to low temperatures. In our view, the magnetic field expanding from the pole-piece makes it possible to characterize the behaviour of electromagnetic micro- and nano-electromechanical systems (MEMS/NEMS) in which the deflection of the movable part is controlled by the electromagnetic force. What must be determined, however, is the magnetic field expanding from the e-beam column, which is a function of many factors, like working distance (WD), magnification and position of the device in relation to the e-beam column. There are only a few experimental methods for determination of the magnetic field in a scanning electron microscope. In this paper we present a method of the magnetic field determination under the scanning electron column by application of a silicon cantilever magnetometer. The micro-cantilever magnetometer is a silicon micro-fabricated MEMS electromagnetic device integrating a current loop of lithographically defined dimensions. Its stiffness can be calibrated with a precision of 5% by the method described by Majstrzyk et al. [4]. The deflection of the magnetometer cantilever is measured with a scanning electron microscope and thus, through knowing the bias current, it is possible to determine the magnetic field generated by the e-beam column in a defined position and at a defined magnification.
Źródło:
Metrology and Measurement Systems; 2020, 27, 1; 141-149
0860-8229
Pojawia się w:
Metrology and Measurement Systems
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 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:
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
Artykuł
Tytuł:
Effect of potato starch modification on starch granules image in the electron microscope
Wpływ modyfikacji skrobi ziemniaczanej na obraz jej ziarn badanych przy użyciu mikroskopu elektronowego
Autorzy:
Dłużewski, M.
Dłużewski, P.
Gromadka, M.
Powiązania:
https://bibliotekanauki.pl/articles/1398956.pdf
Data publikacji:
1987
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
native potato starch
modified potato starch
electron microscope photography
Opis:
An electron microscope was used to study the granules of native and modified patata starch. Acid modification caused lesions in the granules and revealed their internal structure. Granules modified by the phosphate method exhibited small modules on their surface, underwent aggregation and tended to stretch.
Badano naturalną skrobię ziemniaczaną oraz po jej modyfikacji metodą kwasową wg Nowickiego [2] i fosforanową wg Świderskiego [7] pod mikroskopem elektronowym skaningowym przy powiększeniu od 400 do 20000 razy. Ziarna naturalnej skrobi miały wielkość od ok. 5 do 100 μm, duże miały kształt jajowaty, a małe kulisty (fot. 1-a). Na powierzchni ziarn występowały linie dzielące je na owalne pola o zbliżonej powierzchni (fot. 1-b), a przy powiększeniu 20000 razy widoczna była delikatna chropowatość powierzchni (fot. 1-c). Ziarna skrobi modyfikowanej metodą kwasową charakteryzowały się zróżnicowanymi ubytkami i budową warstwową (fot. 2). W niektórych ziarnach widać warstwy biegnące radialnie od środka ziarna do jego powierzchni (fot. 3-a, 3-b) oraz ich podział dichotoniczny na coraz delikatniejsze i cieńsze elementy (fot. 4-a, 4-b). Ziarna skrobi modyfikowanej metodą fosforanową nie wykazały ubytków (fot. 5-a), natomiast na ich powierzchni obserwowanej w powiększeniu 10000 razy widoczne były drobne guzki (fot. 6-a). Ziarna wykazały tendencję do zlepiania się (fot. 6-b) i tworzenia rozciągniętych pasm (fot. 5-a). Wśród ziarn małych wystąpiły ziarna z regularnymi wgłębieniami (fot. 5-b).
Źródło:
Acta Alimentaria Polonica; 1987, 13, 1; 23-31
0137-1495
Pojawia się w:
Acta Alimentaria Polonica
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:
Epidermal micromorphology of Hordelymus europaeus (L.) Jess. ex Harz (Poaceae)
Autorzy:
Klimko, M.
Nowinska, R.
Czarna, A.
Powiązania:
https://bibliotekanauki.pl/articles/790567.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
micromorphology
Hordelymus europaeus
Poaceae
scanning electron microscope
reproductive organ
Opis:
This paper presents the macromorphological and micromorphological characteristics of wood barley recorded in the Wielkopolska Lowland. On the basis of the collection of preserved specimens, the micromorphological features were examined under a scanning electron microscope (SEM) to assess their taxonomic value. The principal features include the size and shape of cork/silica cells, crown cells, prickles, macro-hairs and stomata as well as the morphology of long cells in vegetative and reproductive organs.
Źródło:
Steciana; 2015, 19, 2
1689-653X
Pojawia się w:
Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Extrusion in the Complex Strain State on the Microstructure and Mechanical Properties of MgAlZn Magnesium Alloys
Autorzy:
Bednarczyk, I.
Kuc, D.
Tomaszewska, A.
Tkocz, M.
Powiązania:
https://bibliotekanauki.pl/articles/353998.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium alloys
KoBo method
microstructure
electron microscope
shape factor
Opis:
The paper presents the results of tests concerning the effect of the extrusion process in the complex strain state on the microstructure and properties of one of magnesium alloy with aluminium, zinc and manganese, designated AZ61. Due to its specific gravity, it is increasingly being used in the automotive and aerospace industries to reduce the weight of structural elements. As a result of plastic deformation processes, rods with a diameter of 8, 6 and 4 mm were obtained from AZ61 magnesium alloy. The microstructure analysis was performed using light and electron microscopy (STEM) techniques in the initial state and afterplastic deformation. Microstructure studies were supplemented with a quantitative analysis using the Metilo program. A number of stereological parameters were determined: average diameter of grain, shape factor. A static tensile test was carried out at 250ºC and 300ºC, at deformation rates of 0.01, 0.001 and 0.0001 m·s-1. Better plastic properties after deformation using KoBo methodwere obtained than with conventional extrusion.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 1121-1128
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in glioblastoma multiforme ultrastructure after diamond nanoparticles treatment. Experimental model in ovo
Zmiany w ultrastrukturze glioblastoma multiforme po zastosowaniu nanocząstek diamentu. Badania modelowe in ovo
Autorzy:
Grodzik, M.
Powiązania:
https://bibliotekanauki.pl/articles/2751.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
glioblastoma
ultrastructure
diamond
nanoparticle
treatment
experimental model
transmission electron microscope
Opis:
Experimental model in ovo. Glioblastoma multiforme (GBM) is the most common primary malignancy in the brain and confers a uniformly poor prognosis. Despite decades of research on the topic, limited progress has been made to improve the poor survival associated with this disease, new therapeutic strategies are still needed. The application of nanotechnology to disease treatment, diagnosis, monitoring, drug delivery platform and to the control of biological systems is promising, also in cancer therapy. Diamond na-noparticles (DN) are bioactive substance toward glioma tumour cultured on the chicken embryo chorioallantoic membrane (CAM). DN reduce tumor mass and volume and inhibited new blood vessel development in glioma tumor. In the present experiment we additionally observed, that DN caused changes in the tumor ultrastructure testify to the ongoing process of cell death, probably carried out by autophagy.
Zmiany w ultrastrukturze glioblastoma multiforme po zastosowaniu nanocząstek diamentu. Badania modelowe in ovo. Glioblastoma multiforme (GBM) jest najczęściej występującym złośliwym nowotworem pierwotnym mózgu o bardzo złych rokowaniach. Pomimo dekad lat badań na tym problemem, niewielki postęp został uczyniony aby wydłużyć życie chorym, nowe strategie terapeutyczne są nadal poszukiwane. Zastosowanie nanotechnologii w leczeniu chorób, diagnostyce, monitornigu, platformach dostarczania substancji aktywnych i kontroli systemów biologicznych daje nadzieję na poprawę aktualnej sytuacji, również w terapii nowotworów. Nanocząstki diamentu (DN) są bioaktywnymi substancjami w stosunku do guza mózgu hodowanego na błonie kosmówko-wo-omoczniowej zarodka kury. DN redukuje masę i objętość guza oraz hamuje rozwój nowych naczyń krwionośnych (angiogenezę). W prezentowanym doświadczeniu dodatkowo zaobserwowano zmiany w ultrastrukturze komórek guza pod wpływem działania nanocząstek diamentu, które świadczą o zachodzących procesach śmierci komórkowej, prawdopodobnie na drodze autofagii.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2013, 52
1898-8830
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Animal Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Accumulated Electrons at PET Surface Using Mirror Effect Phenomena in SEM
Autorzy:
Abood, Tareq H.
Hadi, Hasan A.
Mohi, Ali T.
Powiązania:
https://bibliotekanauki.pl/articles/1192591.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Polyethylene Terephthalate
scanning electron microscope
Magnification Factor Method
Disappearing Method
Opis:
An experimental-theoretical investigation have been presented to exploring phenomena of mirror effect. The Polyethylene Terephthalate (PET) material is chosen to be a case study throughout this work. Where the scanning electron microscope (SEM) is used for executing the experiments. Attention has been focused on determination of the number of electrons that accumulated at PET surface, since it is regarded to be the most important factor for producing mirror effect images. Thus two different procedures are produced to achieve such a task namely Magnification Factor Method and Disappearing Method. Results obtained from these two approaches have clearly shown that mirror effects can accurately be used as an excellent tool to determine dielectric constant of insulator.
Źródło:
World Scientific News; 2016, 55; 27-37
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystallization of the Structural Components of Multiple Remelted AlSi9Cu3 Alloy
Autorzy:
Matejka, M.
Bolibruchova, D.
Kuriš, M.
Powiązania:
https://bibliotekanauki.pl/articles/1837683.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si-Cu
remelting
returnable material
structural components
scanning electron microscope
Opis:
At present, Al-Si-Cu based alloys (with a typical representative AlSi9Cu3 alloy) represent more than half of the castings used in various industries (automotive, aerospace and electrical engineering). These are most often sub-eutectic (exceptionally eutectic) alloys with a content of 6 to 13 wt. % Si and 1 to 5 wt. % Cu. The aim of the paper is to point out the importance of the evaluation of input raw materials that determines the overall properties of the casting and the costs invested in its production. A negative impact on performance can be expected when using an alloy made up of a high proportion of recycled material, despite its economic benefits. Experimental alloys were evaluated based on the results of crystallization process and a combination of scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and deep etching. The effect of remelting and increasing the remelted returnable material in the batch was manifested especially in the crystallization of iron-rich phases. The negative effect of remelting on the structural components was manifested after the fourth remelting. Gradual increase of remelted returnable material in the batch causes harmful changes in the crystallization process.
Źródło:
Archives of Foundry Engineering; 2021, 21, 2; 41-45
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microsporangia and pollen morphology of Ginkgo biloba cultivars
Autorzy:
Korszun, S.
Klimko, M.
Powiązania:
https://bibliotekanauki.pl/articles/41651.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
microsporangium
pollen grain
pollen morphology
Ginkgo biloba
plant cultivar
scanning electron microscope
Opis:
Morphological features of microsporangia and pollen grains from cultivated plants of Ginkgo biloba were examined using light and scanning microscopy. The sporophylls bear mainly two pendulous microsporangia; three or four were rarely found. The sporangia dehisce along a longitudinal slit and are characterized by reticulate primary sculpture. The basic shape of pollen grains is prolate and perprolate (rarely spheroidal) and they possess a single aperture, which extends from one extremity of the pollen grain to the other. The surface is rugulate, folded, psilate, psilate-slightly striate, regularly striate and fossulate. Perforations are present. Different types of sculpture were found on the same specimens. Our results suggest that although some cultivated plants are morphologically well characterized by habit and shape of leaves, they cannot be separated based on microsporangia and pollen grain morphology. In our investigations the microsporangia and pollen grain micromorphology of eight cultivars of Ginkgo were studied for the first time, providing some important new data.
Źródło:
Dendrobiology; 2014, 71
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution and Characterization of Zirconium 702 alloy at various temperatures
Autorzy:
Lade, Jayahari
Dharavath, Baloji
Badrish, Anand
Kosaraju, Satyanarayana
Singh, Swadesh Kumar
Saxena, Kuldeep Kumar
Powiązania:
https://bibliotekanauki.pl/articles/28099558.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Zirconium 702 alloy
ANOVA
% elongation
ultimate tensile strength
yield strength
scanning electron microscope
Opis:
The Zirconium 702 alloy effectively used in nuclear industry at various critical conditions like high temperature and high pressure. This survey is an assessment of insights into the mechanical properties of the metal when exposed to different temperatures along the rolling direction.The main objective of this work is to characterize the tensile properties, and fracture study of broken tensile test samples at various temperatures.The tensile samples tested in our current work are 100°C, 150°C, and 200°C temperatures in different directions (0°, 45°, 90°) along with the rolling direction of the sheet. It is evident from the experimental results that temperatures significantly affect material properties. Temperature increases cause % elongation to increase, and strength decreases. ANOVA analysis revealed that temperature significantly influenced ultimate tensile strength (UTS), and yield strength (YS), as well as % elongation.The temperature contribution for UTS, YS, and % elongation is 41.90%, 31.60%, and 77.80% respectively. SEM fractured images showing the ductile type of behavior for all the temperatures.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 807--812
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theodosius II’s solidus from Prełuki, Sanok County in material and traseological examinations
Autorzy:
Biborski, Marcin
Biborski, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/2042504.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
solidus
Electron microscope
chemical compounds analysis
obverse
reverse
traseological analysis
graver
coin's die
Opis:
The aim of the analysis of Theodosius’ II solid was to determine the chemical compounds of the coin alloy and to conduct a traseological analysis. The results show that the fineness of gold of which the coin was made was very high (obverse: 99,16% which means 23,8 karat gold and reverse of 99,20% which constitutes for the 23,81 karat gold), and the alloy metal was silver (0,65% and 0,62%). Traseological analysis has shown, that the hole in the lower part of the obverse, 2,1 mm in the diameter, was drilled with a very sharp, narrow, conical tool, the marks of which are still visible on the inside of the hole. Also, some traces of work concerning the coin’s die have been spotted. The engraving of the die was done gradually. Traces of consequent scratching with a graver are well visible both on the obverse and reverse. The character of places where sharp edges framing letters and some images are preserved serve proof of those being prepared with the use of a narrow, triangular-ended graver. All this suggests, that the maker of the die had a developed set of technical and artistic skills.
Źródło:
Acta Archaeologica Carpathica; 2019, 54; 285-292
0001-5229
2719-4841
Pojawia się w:
Acta Archaeologica Carpathica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 47

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