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Wyświetlanie 1-15 z 111
Tytuł:
SEM and stereoscope microscope observations on the seeds of the Polish species of the genus Sorbus L. [Rosaceae]
Autorzy:
Maciejewska-Rutkowska, I
Bednorz, L.
Powiązania:
https://bibliotekanauki.pl/articles/57855.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Rosaceae
Sorbus
botany
morphology
stereoscope microscope
scanning microscope
seed
Opis:
This paper presents the results of the study on seed morphology of five Polish species of the genus Sorbus L. (S. aria (L.) Crantz, S. aucuparia L. Emend. Hedl., S. chamaemespilus (L.) Crantz, S. intermedia (Ehrh.) Pers. and S. torminalis (L.) Crantz). Observations and measurements were carried out with stereoscope and scanning microscopes. Four types of seed microsculpture were distinguished on the ground of SEM observations. The key to determine Polish species, based on morphological characters of seeds is given too.
Źródło:
Acta Societatis Botanicorum Poloniae; 2004, 73, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of acceleration of different dynamic microobjects by the television scanning optical microscope
Autorzy:
Prudyus, I.
Matiieshyn, Y.
Powiązania:
https://bibliotekanauki.pl/articles/114123.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
television scanning optical microscope
microscope field of view
acceleration of movement
Opis:
The acceleration of the dynamic microobjects (MO) movement, the motion of which is accelerated uniformly or non-uniformly is an important task for television measuring systems. Most existing measuring systems usually have a small range of acceleration with a short period of growth. Such period of growth of the acceleration is characteristic for many dynamic MO. Better instruments to determine the non-uniform velocity of the various objects are based on various laser devices. These instruments are contactless and high-speed enough. In the paper the basics of the television scanning optical microscope (TSOM) are presented. In the Chapter 2 the schematic diagram of the TSOM and its main functionalities are pointed out. In the Chapter 3 an adaptation of the TSOM for movement acceleration of microobjects is discussed. Modified structural and functional diagram of the instrument is presented.
Źródło:
Measurement Automation Monitoring; 2015, 61, 8; 410-412
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Petrographic characteristics of the north-western part of Kosovo
Autorzy:
Kutllovci, F.
Powiązania:
https://bibliotekanauki.pl/articles/88922.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
magmatism
metamorphism
microscope properties
Opis:
In the north – western part of Kosovo, the next lito stratigraphic units were separated: Palaeozoic (gneiss, mica schists, leucogneiss, amphibolite, quartzite), Jurassic (Serpentinised hazburgit, Schist serpentines with granitic intrusion, Basalts with dacite dykes, Dacite, Metamorphic sole (amphibolites), Supra ophiolite sedimentary mélange), Cretaceous (Valanginian basal conglomerates, Valanginian–Hauterivian silty – sandstone turbidity’s, Barremian–Aptian basal conglomerates, Barremian–Aptian silty – marl turbidity’s, Albian–Senomanian sandy – phillitic turbidites, Santonian sedimentary ophiolitic melange) Quaternary (alluvium, proluvium, slope wash, lower river terrace, higher river terrace, lacustrine, gravel and sand). The samples were taken from those rocks for chemical, geo-chemical and for the preparation of petrographic microscope properties. The analyses were completed at the certified laboratory of Geology-Mining Faculty (Polytechnic University of Tirana) – Geosciences Institute.
Źródło:
Mining Science; 2018, 25; 49-56
2300-9586
2353-5423
Pojawia się w:
Mining Science
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:
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:
Pollen morphology of Rosa gallica L. [Rosaceae] from Southern Poland
Autorzy:
Wronska-Pilarek, D
Boratynska, K.
Powiązania:
https://bibliotekanauki.pl/articles/58479.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
French rose
Rosaceae
multivariate analysis
rose
Rosa gallica
pollen morphology
light microscope
scanning microscope
Opis:
The morphology of pollen grains of Rosa gallica was studied on the basis of material from 15 natural localities in southern Poland. It was ascertained that the diagnostic features of pollen grains of R. gallica were: the presence of deep, often Y-shaped striae in a linear arrangement; numerous perforations of various, rather big diameters on the bottom of striae; the occurrence of operculum on the membrane of ectocolpus; the presence of costae ectocolpi and fastigium in the area of endopori. The most significant differences among the particular samples studied concern the shape of grains. The differences between pollen grains of 15 individuals of Rosa gallica from southern Poland are generally slight. The most discriminating measured character is length of equatorial axis of pollen grain and length of ectocolpi and thickness of exine along polar axis. The remaining differentiate the individuals with smaller significance. The differences between Silesian samples and all the other examined ones may result from origin of different Pleistocene refugia.
Źródło:
Acta Societatis Botanicorum Poloniae; 2005, 74, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
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:
Recognizing the authenticity of the postal envelopes sealing using IR thermography and thickness measurement
Autorzy:
Kopeć, M.
Powiązania:
https://bibliotekanauki.pl/articles/114111.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
envelope
sealing
infrared camera
caliper
microscope
Opis:
This paper presents two methods to recognize authenticity of the postal envelopes sealing. These methods are: infrared thermography and thickness measurement. Additionally, microscope inspection is presented. Based on the results, quantitative assessment was developed. The proposed methods make it possible to recognize authenticity of the postal envelopes sealing.
Źródło:
Measurement Automation Monitoring; 2017, 63, 3; 111-114
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polarization multiplexed bit data recording to submicron-particles-arrayed optical storage
Autorzy:
Okuzono, Daiki
Egami, Chikara
Powiązania:
https://bibliotekanauki.pl/articles/2060688.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
submicron particle
confocal microscope
optical storage
Opis:
In this study, a submicron-particles-arrayed optical storage disk was fabricated by the spin coating method. Moreover, we have formed a multi-valued pit by irradiating linearly polarized laser beams at multiple angles (0° and 90°). The optical setup has the semiconductor laser (λ = 637 nm) for reconstructing and the SHG-YVO4 laser (λ = 532 nm) for recording. The optical setup measured the submicron-particles-arrayed optical storage as a confocal image by 2D scanning with a motorized stage.
Źródło:
Optica Applicata; 2022, 52, 1; 67--76
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occupational concerns associated with regular use of microscope
Autorzy:
Jain, Garima
Shetty, Pushparaja
Powiązania:
https://bibliotekanauki.pl/articles/2178866.pdf
Data publikacji:
2014-08-06
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
occupational hazards
microscope use
ergonomics
musculoskeletal problems
Opis:
Objectives: Microscope work can be strenuous both to the visual system and the musculoskeletal system. Lack of awareness or indifference towards health issues may result in microscope users becoming victim to many occupational hazards. Our objective was to understand the occupational problems associated with regular use of microscope, awareness regarding the hazards, attitude and practice of microscope users towards the problems and preventive strategies. Material and Methods: A questionnaire based survey done on 50 professionals and technicians who used microscope regularly in pathology, microbiology, hematology and cytology laboratories. Results: Sixty two percent of subjects declared that they were suffering from musculoskeletal problems, most common locations being neck and back. Maximum prevalence of musculoskeletal problems was noted in those using microscope for 11–15 years and for more than 30 h/week. Sixty two percent of subjects were aware of workplace ergonomics. Fifty six percent of microscope users took regular short breaks for stretching exercises and 58% took visual breaks every 15–30 min in between microscope use sessions. As many as 94% subjects reported some form of visual problem. Fourty four percent of microscope users felt stressed with long working hours on microscope. Conclusions: The most common occupational concerns of microscope users were musculoskeletal problems of neck and back regions, eye fatigue, aggravation of ametropia, headache, stress due to long working hours and anxiety during or after microscope use. There is an immediate need for increasing awareness about the various occupational hazards and their irreversible effects to prevent them.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 4; 591-598
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface topography of slide journal bearings
Autorzy:
Miszczak, A.
Czaban, A.
Powiązania:
https://bibliotekanauki.pl/articles/246105.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
atomic force microscope
surface topography
journal bearing
Opis:
In this article the measurements results of surface topography of different types of slide bearings sleeves have been presented. The research has been conducted with the use of atomic force microscope (AFM). The results of measurements of surface topography were presented in the form of surface topography maps, three-dimensional graphs and some examples of selected cross-sections of investigated surface in the form of profile graphs. Measurements of surface topography were made for thin-walled sleeves of slide journal bearings covered with PTFE, POM, bronze and white metal layers. Operated and new sleeves have been considered with the use of Atomic Force Microscope NT-206produced in MTM in Minsk, Republic of Belarus [2]. Atomic Force Microscope NT-206 provides information for samples with maximum roughness value plus or minus 1 mi m. Max. field in one scanning process is up to 32)um x 32mi m. Measurements were preceded with resolution 256x256points. Presented in the work results of surface topography measurements also include the calculated values of average deviation profile Ra and Rq and the value of fixed distance between the lowest and highest inequality. The application SurfaceXplorer was used for processing and visualization of the data obtained from AFM NT-206, which besides from generating 2D, 3D and profile diagrams, was used to calculate and draw graph of height distribution. The comparison of received data will allow verifying type and amount of surface wear of discussed journal micro-bearings parts in micro and nanoscale and will help to design surface layers with improved tribological properties.
Źródło:
Journal of KONES; 2011, 18, 3; 279-285
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
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:
Analysis and Assessment of Aluminum and Aluminum-Ceramic Foams Structure
Autorzy:
Rogala, Michał
Tuchowski, Wojciech
Czarnecka-Komorowska, Dorota
Gawdzińska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2201873.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
metallic foam
composite foam
statistic analysis
microscope
Opis:
The paper presents an analysis of the aluminum porous structure serving as a structural material used in the automotive or marine industry. The subject of the research is the analysis of the mechanical properties of the aluminum porous structure, in particular its ability to absorb energy. The paper presents a description of the manufacturing process, quality control in the form of a statistical capture of geometric parameters of the foam made, as well as an X-ray microanalysis of the chemical composition of EPMA-EDS and the dispersion of components within the structure. In addition, results of static axial compression analysis of aluminum and composite foam specimens are presented.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 4; 287--297
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
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:
Comparison of sarcomere length for two types of meat from animal family suidae – analysis of measurements carried out by microscopic technique
Autorzy:
Guzek, D
Głąbski, K
Głąbska, D
Plewa, P
Plewa, R
Wierzbicka, A
Powiązania:
https://bibliotekanauki.pl/articles/957999.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sarcomeres
myofibrils
pork meat
wild boar meat
microscope
Opis:
The aim of the research was to evaluate the sarcomere length variation in Psoas ma-jor muscle in pork and wild boar tenderloin. Microscopic slides were prepared and muscles were evaluated in Nomarski contrast – there were made measurements with the number of 150. Subsequently, sarcomeres length of three different, representative myofibrils were measured for each kind of meat. Values of sarcomere’s lengths of myofibrils were characterized by a normal distribution. The mean length of sarcomere was 3.28 ± 0.23 μm for pork meat and 2.51 ± 0.14 μm for wild boar meat – difference between animals was statistically significant (p = 0.0000). It was stated that sarcomere length for pork meat was dependent on the myofibril. A lower variation in the sarco-mere’s length of wild boar meat in comparison with pork meat has been shown. This difference is reflected in tougher wild boar meat texture.
Źródło:
Advances in Science and Technology. Research Journal; 2012, 6, 16; 13-17
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 111

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