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Wyświetlanie 1-15 z 47
Tytuł:
A revised surgical concept of anterior cruciate ligament replacement in a rabbit model : preliminary investigations
Autorzy:
Ficek, K.
Wieczorek, J.
Stodolak-Zych, E.
Kosenyuk, Y.
Powiązania:
https://bibliotekanauki.pl/articles/284158.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
ACL reconstruction
tendon implant
resorbable material
Opis:
In this project the anterior cruciate ligament (ACL) replacement in a rabbit model was performed for the preclinical phase of investigations of a new form of biomaterial i.e. polymer beads (granules). This material, based on resorbable aliphatic polyester (polylactide - PLA) was used as a filler of the bone tunnels to enhance tendon-to-bone healing. The high specific surface area and well known biocompatibility of this material designated it as an osteoconductive agent in reconstructive ligament surgery. Additionally, a new surgical concept was proposed which retains the natural elasticity of the harvested tendon. This method ensures fixation of the grafted tendon within the bone tunnels in their entire length.
Źródło:
Engineering of Biomaterials; 2012, 15, 113; 33-34
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aromatic peptides as components of potential scaffolds for regenerative medicine
Autorzy:
Strzempek, W.
Menaszek, E.
Dziadek, M.
Stodolak-Zych, E.
Boguń, M.
Kolesińska, B.
Powiązania:
https://bibliotekanauki.pl/articles/284726.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
peptides
components
regenerative medicine
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 74
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad zwiększeniem funkcjonalności ektoprotez silikonowych
Investigations on improvement of functionality of silicone ectoprostheses
Autorzy:
Stodolak, E.
Matraszek, H.
Góra, A.
Błażewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/286163.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
ektoprotezy
modyfikacja powierzchni
silikony
adhezja
ecto-prothesis
surface modification
silicones
adhesion
Opis:
Silikonowe protezy twarzy (epitezy, ektoprotezy, protezy zewnętrzne) stosowane są u pacjentów, którzy w wyniku zabiegu chirurgicznego, w ramach leczenia chorób nowotworowych, wad wrodzonych, urazu utracili tkanki miękkie i twarde w zakresie twarzoczaszki np. oko, ucho, nos. Rekonstrukcje protetyczne wykorzystuje się w przypadku, gdy metody chirurgii plastycznej są nieskuteczne lub nie mogą być zastosowane. Istnieją różne metody umocowania ektoprotez. Badania kliniczne i ankietowe wykazały, iż większość pacjentów w pierwszej kolejności wybierała kleje medyczne. Niestety kleje te charakteryzują się krótkim czasem trwałego przytwierdzenia protezy do miejsca ubytku. W pracy zbadano przyczepności trzech rodzajów materiałów silikonowych przytwierdzanych do skóry pacjentów za pomocą klejów i taśm komercyjnych. W celu poprawy adhezji tworzywa zastosowano dwa rodzaje modyfikacji powierzchni. Zbadano wpływ obróbki mechanicznej na powierzchnie silikonów (gwarantujący wzrost chropowatości powierzchni). Zbadano także skuteczność chemicznej metody obróbki powierzchni (trawienie tworzywa w roztworach kwasów nieorganicznych). Celem weryfikacji skuteczności zastosowanych metod modyfikujących powierzchnię opracowano metodę pomiaru adhezji pomiędzy materiałem polimerowym a badanym środkiem klejącym (taśma, klej) wykorzystując w tym celu układ uchwytów uniwersalnej maszyny wytrzymałościowej.
Silicone facial prostheses (epitheses, ecto-prostheses, external prostheses) are applied for patients who lost soft and hard tissues in craniofacial area, e. g. eye, ear, nose, due to a surgical treatment; tumour diseases treatment; birth defects or injuries. Prosthetic reconstructions are used when plastic surgery methods are ineffective, or cannot be applied. There are various methods of the ecto-prostheses fastening. Clinical tests and surveys revealed that the first choice for the majority of patients is medical glues. However, such glues can provide only short-time fastening of prosthesis to the damaged area. The work presents results of investigations on adhesion of three kinds of silicone materials fastened to patients' skin with the use of commercial glues and adhesive tapes. In order to improve the materials' adhesion two methods of their surface modification were applied. Influence of a mechanical treatment on the materials' surface was investigated. Effectiveness of the surface chemical treatment i.e. etching of the materials with inorganic acids solutions was investigated. In order to verify effectiveness of the applied surface modification methods a testing method of adhesion between the material and the adhesive agent i.e. adhesive tape or glue was developed. The testing method utilised a universal testing machine.
Źródło:
Engineering of Biomaterials; 2008, 11, no. 81-84; 31-35
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioactivity and stability studies of POM/HAp nanocomposites
Autorzy:
Pielichowska, K.
Stodolak, E.
Powiązania:
https://bibliotekanauki.pl/articles/286002.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
bioactivity
stability
Źródło:
Engineering of Biomaterials; 2010, 13, no. 99-101; 1-2
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioactivity assessment of ceramic nanoparticels used as a filler in nanocomposite materials
Autorzy:
Gęgotek, K.
Zych, Ł.
Stodolak-Zych, E.
Powiązania:
https://bibliotekanauki.pl/articles/285902.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposite
bioactivity
scaffolds
regenerative medicine
bioceramics
zeta potential
Opis:
The paper presents research on degree of bioactivity of nanometric ceramic particles used as a nanofiller in nanocomposite materials based on polymers. The nanoperticles used in our examination were: different bioceramics powders such as: hydroxyapatite (HAp), β-phosphate (V) calcium (βTCP), silica (SiO2) and bioglass (BG). Based on ζ-potential measurements dynamics of processes occurring on the surface of nanoparticles in stimulated body fluid (SBF) was determined and it confirmed possibility of apatite formation. This study showed predominance of bioglass over other bioceramic materials, Bioglass nanoparticles were the most bioactive ones. In the end of the experiment the bioacermic particles were used as a nanofiller of poli-L/DL-lactide (PLDLA) matrix composites. The composite materials were prepared by casting from solution. Bioactivity tests were performed in simulated body fluid (artificial plasma of various ions concentration, and SBF 2SBF). Based on surface microstructure observed in the SEM (EDS) analysis were confirmed the degree of bioactivity of various materials depending on the type nanofiller.
Źródło:
Engineering of Biomaterials; 2013, 16, no. 122-123 spec. iss.; 73-74
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biocomatibility study of BOC polymer mesh enriched with HAp and TCP covered by PCL fibres
Autorzy:
Menaszek, E.
Ścisłowska-Czarnecka, A.
Draczyński, Z.
Bogun, M.
Stodolak-Zych, E.
Powiązania:
https://bibliotekanauki.pl/articles/286223.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
polymer mesh
HAp
TCP
osteoblasts NHOst
Opis:
The study was conducted in order to determine the biocomatibility of polimer mesh based on BOC and enriched with HAp or TCP coverd by PCL sub-micrometric fibres. Human osteoblast cell line NHOst was cultured in standard conditions on disk-shaped polymer samples. Interactions between materials and cells were examined through microscopic observation of cells' adhesion and morphology, and tests of viability/proliferation and cytotoxicity. The study proved the biocompatibility of all examined materials, though the surface of TCP enriched polymer didn't promote the adhesion of cells.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 151-152
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biocompatibility of hybrid fibrous materials basing on poly-L/DL-lactide
Autorzy:
Stodolak, E.
Ścisłowska-Czarnecka, A.
Błażewicz, M.
Bogun, M.
Mikolajczyk, T.
Menaszek, E.
Powiązania:
https://bibliotekanauki.pl/articles/286193.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hybrid biomaterials
composites
nanocomposite materials
Opis:
Hybrid biomaterials due to their unique structure may become an alternative for many popular composite and nanocomposite materials. Multilevel modification of their matrix manifesting itself in the presence of particles of different sizes i.e., micrometric, submicrometric and nanometric together with the variety of shapes of a modyfing phase (nanometric fibres, submicron particles, coated nanoparticles) and its different chemical character make the hybrid materials similar to natural tissue. Bone tissue structure is particulary close to this model in which collagen fibres and hydroxyapatite particles and nanoparticles have not only different form but first of all they play different role in the tissue which depends on their chemical nature. In the biomedical engineering syntetic hybride biomaterials are usually produced using resorbable and degradable polymer matrices and inorganic filers (ceramic bioactive particles; HAp, TCP, SiO2) or organic filers (collagen, polysaccharides e.g. alginate fibres). The main function of the modyfing phase is inprovement of the polymer matrix leading to bioactive, stronger material showing high biofunctionality. Production of hybrid materials is based mainly on experimental works, which is related to the presence in their matrix few phases with different properties which may interact. Hybrid materials do not follow the rule of mixtures thus it is difficult to predict behaviour of a material in which co-exis different chemical and phisical phases. In the work hybrid composite foils were produced in which modyfing phase consisted in; nanocomposite calcium alginate fibres modyfied with ceramic nanoparticles; HAp (CAH fibres), TCP (CAT fibres), SiO2 (CAS fibres) and MMT (CAM fibres). Short fibres were subjected to additional size reduction in vibration ball mill resultiong in submicron and nanometric phases. Size of the particels after grinding was determined by screening analysis and DLS method (for particels smaller than 500 nm). It was observed than the population of short fibres consist in three fractions i.e.; micrometric (~2μm, 50 wt.%), submicrometric (500–800 nm, 40 wt.%) and nanometric ( below 500 nm, 10 wt.%). The fibres and products of their grinding were homogenised in P(L/ DL)LA polymer solution (poly-L/DL-lactide, Purarorb 80, Purac Germany). A hybride material in the form of thin foils containing 2 wt.% of a modyfing phase were subjected to durability tests consisting in incubation in distilled water (30 days/37C). Monitoring of the medium pH and conductivity did not show changes related to harmful products of their decomposition. Osteoblast-like cells from MG-63 line contacted with the surface of the materials showed high viability (MMT test) comparable with the reference material (TCPS). High degree of adherence of the cells to the materal surface (CV test) testifies of potential abilities of the material stimulating proliferation of bone tissue cells. The highes rate of dynamic growth (increase of the cells number after 7 days of incubation) was observed for the material which was modified with CAS fibres and products of their grinding. The performed investigations have a preliminary character. Their results testify for potential osteoconductive or osteoinductive abilities of hybride materials basing on P(L/DL)LA and alginate nanocomposite fibres.
Źródło:
Engineering of Biomaterials; 2010, 13, no. 99-101; 110
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological property poly(ε- caprolactone) as potential material for reproduction devices
Autorzy:
Wieczorek, R.
Stodolak-Zych, E.
Kosenyuk, Y.
Powiązania:
https://bibliotekanauki.pl/articles/284532.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
poly(ε-caprolactone)
reproduction
biomaterials
Opis:
The main limitation of embryos transfer is the lack of catheters for their obtaining and transferring which would have desirable and confirmed biological properties ensuring high bioconcordance and low toxicity. Catheters used routinely for embryos obtaining and transfer are tools used for insemination, urology and other medical purposes, but their bioconcordance with embryos was never confirmed. For these reasons in our studies we attempted to develop the modern set of catheters designed for the contact with embryos, based on the biomaterial characterized by good biological and mechanical properties such as with optimal resilience and elastic properties, and capable to be free shaped in the form of a tube of 1-2 mm diameter. The material which hypothetically fulfills biological requirements and at the same time gives possibility of free shaping is resorbable polymer used for the long time in many fields of medicine is poly-ε-caprolactone (PCL). Because of its biological and physical properties it was taken into consideration to use this biomaterial for in vitro embryos culture and for cryoconservation. The aim of the study was verification of biological properties of poly-ε-caprolactone (PCL) as the material dedicated to biotechnology of animal reproduction and gynecology and evaluation of possibility of poly-ε-caprolactone (PCL) application as a potential material for production of medical devices, as catheters for obtaining and transporting of embryos as well as dishes for embryos culture in vitro and covers for cryoconservation. The possible application of this biomaterial needs verification of its biological properties on embryos culture. The foil discs made of the polycaprolactone, thickness 0.5 mm, diameter 3.5 mm, were prepared in two forms: the reference one (nPCL) and thermally modified by freezing in liquid nitrogen (mPCL). The verification of PCL bioconcordance was performed by evaluation of 102 pig embryos at the development stage of 2 to 4 blastomers. To evaluate poly-ε-caprolactone bioconcordance 5-day long culture of the embryos was performed on the evaluating material, not frozen (nPCL) and frozen in liquid nitrogen (mPCL) and additionally culture after short contact with poly-ε-caprolactone lasting 15 minutes (nPCL-15). In all evaluated study groups the development of embryos was suppressed shortly after transfer to the culture with PCL. In the control group 74-78% of the embryos reached blastocyst stage. Because of cytotoxic influence of polycaprolacton on embryos it cannot be used as the material for catheter production used in biotechnology of animal reproduction and other materials used for in vitro culture and cryoconservation.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 140
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon nanocomposite membrane with bioactive fillers
Autorzy:
Stodolak-Zych, E.
Szatkowski, P
Błażewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/285168.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
membranes
bioactive fillers
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 57
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chitosan microcapsules obtained by wet method as potential carriers for active substance
Autorzy:
Startek, J.
Dzierzkowska, E.
Golańska, J.
Stodolak-Zych, E.
Rapacz-Kmita, A.
Powiązania:
https://bibliotekanauki.pl/articles/283823.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
biomaterials
chitosan
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 92
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chitosan-based nanocomposites as potential materials for nerve regeneration
Autorzy:
Turek, A.
Dudziński, K.
Stodolak-Zych, E.
Powiązania:
https://bibliotekanauki.pl/articles/284042.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
chitosan
carbon fillers
guided nerve regeneration (GNR)
Opis:
The nanocomposite material based on chitosan was obtained and characterized. Commercially produced biopolymer at 85% deacetylization degree was used. The biopolymer matrix was modified with carbon nanofillers such as graphite oxide (GO), carbon nanotubes (CNTs) and nanontubes with the surface affected by carboxyl groups (CNT-COOH). The obtained nanocomposites were formed by means of two methods: casting (to manufacture nanocomposite foils) and liofilization (to manufacture porous nanocomposite materials). Their electrical properties and microstructure were examined. The tests proved that adding the carbon nano-filler results in high resistivity (graphite foils, carbon nanotubes) and also the average size of pores in liofilized materials. Additionally, the electric potential of the materials may be improved by surface processing (EPD- electrophoretic deposition). The described materials are an alternative to polymer nerve implants e.g. tubes or hydrogels which are already present on the market and applied to regenerate nerves.
Źródło:
Engineering of Biomaterials; 2014, 17, no. 128-129; 86-87
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of porous polymeric membranes as drug carriers
Autorzy:
Stodolak-Zych, E.
Mikołajczyk, M.
Rapacz-Kmita, A.
Powiązania:
https://bibliotekanauki.pl/articles/285554.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
polymeric membranes
drugs carriers
polymers
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 53
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of durability of resorbable polymer pins in in vitro and in vivo conditions: preliminary study
Autorzy:
Stodolak-Zych, E.
Pałka, K.
Szponder, T.
Nowicka, K.
Błażewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/284181.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
meniscus
bone pins
polylactide
regeneration
Opis:
The work focuses on polymeric cartilage/bone pins (pegs) that were manufactured and tested to assess their application in meniscus injuries. The bone pins measuring 1,2 and 4 mm in diameter were produced from certified resorbable PLDLA by means of hot pressing (at 126oC). In order to establish the material characteristics, tests of mechanical properties, structural testing and stability tests were performed in vitro (an immersion medium: water/PBS buffer). It was established that after three months of incubation the initial implant’s bending strength (120 MPa) decreased by 35%, whereas its tensile strength (52 Pa) weakened by 60%. The degree of degradation did not affect the pH of the immersion fluid. The observed physical changes of the implant, such as: the mass decrease, the change of shape, the increase of crystallinity (DSC/TG), the number of polymer terminal groups (-OH, -COOH), proved the advanced degradation process of PLDLA pins. Implants of particular behaviour were inoculated into the tibia of a New Zealand rabbit. In vivo tests were conducted to confirm the changes observed in vitro. Monitoring of the degradation process was performed after three months following the implantation by means of control X-ray and computed microtomography (μCT).
Źródło:
Engineering of Biomaterials; 2014, 17, no. 128-129; 87-89
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Composites for Bone Surgery Based on Micro- and Nanocarbons
Autorzy:
Stodolak, E.
Fraczek-Szczypta, A.
Blazewicz, M.
Blazewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/1535897.pdf
Data publikacji:
2010-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
81.05.uj
87.85.jj
87.85.jc
87.17.Ee
Opis:
In this work capabilities of polymer composites modified with carbon materials for application in the bone surgery were compared. The composite materials were produced from synthetic polymer PTFE-PVDF-PP modified with a carbon phase such as: short carbon fibres, carbon nanotubes and carbon fabrics. Determination of mechanical properties of the composite materials indicated that the carbon phase improves strength and Young's modulus of the composite. Moreover, the mechanical parameters can be controlled by the form and amount of the carbon phase introduced into the polymer matrix. Both the fibres and the carbon nanotubes influenced wettability and surface energy of the composites. Also topography of the materials surface was altered, and its roughness was optimal for bone cells (profilometry). Osteoblasts contacted with the polymer-carbon composites showed increased viability comparing with the ones contacting with the pure polymer foil (viability, and cells proliferation: MTT method, concentration of bone protein: viniculine and β-actine). Results of the investigations indicated that the composite materials containing carbon phases are potential materials for repairing of bone tissue damages.
Źródło:
Acta Physica Polonica A; 2010, 118, 3; 450-456
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conductive polymer based nanocomposite membranes for biomedical applications
Autorzy:
Stodolak-Zych, E.
Chmielewska, M.
Jeleń, P.
Powiązania:
https://bibliotekanauki.pl/articles/284370.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
porous membranes
carbon fillers
polyvinylidene difluoride (PVDF)
conductive
phase inversion
Opis:
The aim of this work was to examine composite membranes obtained by means of phase inversion from a synthetic stable polymer – polyvinylidene difluoride (PVDF). The piezoelectric polymer was modified with 0.5-1wt% addition of commercial carbon fillers: graphite oxide (GO, 1wt%), multiwalled carbon nanotubes (CNT, 1wt%) and functionalized nanotubes (CNT-COOH, 0.5wt%). The membranes were obtained by solidification of nanocomposite solutions in coagulation bath (CH3OH). The obtained series of materials differed in surface porosity (P), electric conductivity (σ) and surface free energy (SFE). It was proved that presence of carbon nanoadditive influenced microstructure of the membranes: the mean size of pores in the membrane rose in the following order: GO→CNT→CNT-COOH. The very same system depicted the influence of the filler on the membrane structure: the increase in membrane crystallinity (λ) and the β phase share (FT Raman). From all the examined nanocomposite systems, the PVDF modified with 0.5wt% CNT-COOH displayed the most advantageous electric properties. These nanocomposite membrane (PVDF/CNT-COOH) could be used as a low-voltage electrodes in biomedical application. Yet, taking into account the other physicochemical, mechanical and structural properties, the membranes modified with 1wt% CNT and 1wt% GO were also interesting.
Źródło:
Engineering of Biomaterials; 2017, 20, 139; 2-7
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 47

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