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Tytuł:
Laparoscopic embryo transfer in pigs – comparison of different variants and efficiencies of the method
Autorzy:
Wieczorek, J.
Stodolak-Zych, E.
Okoń, K.
Koseniuk, J.
Bryła, M.
Jura, J.
Poniedziałek-Kempny, K.
Rajska, I.
Sobol, K.
Kotula Balak, M.
Chmurska-Gasowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/16648001.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
laparoscopy
embryo
transfer
pig
Opis:
The aim of the study was to develop a method of laparoscopic embryo transfer in pigs and to compare different variants of this method. Two catheter diameters (1.6 mm and 1.0 mm), the method and site of embryo deposition (oviduct or uterus), the embryo development stage (2 – 4 cell or blastocyst), the method for oviduct or uterus stabilization, the potential for cryopreserved embryo transfer, the developmental potential of the embryos after transfer to the oviduct, patomorphology of the oviduct after transfer and possible clinical complications were taken into consideration. Two studies compared two variants of transfer to the uterus, and five variants of transfer to the fallopian tube. The transfer of embryos by the infundibulum may be of limited use due to handling problems and very low efficiency (pregnancy was not achieved). Very low efficiency was shown after transfer of vitrified embryos. Transfer to the fallopian tube by puncture of the fallopian tube, regardless of the developmental stage of the embryo, is the recommended method of embryo transfer. The histopathological examination of the fallopian tube revealed possible changes within the puncture site. The numerous clinical complications observed did not affect the effectiveness of the method.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 2; 295-306
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of parents’ satisfaction with caring for children hospitalized in a pediatric ward – part 1
Autorzy:
Kremska, A.
Kołodziej, B.
Wróbel, R.
Kraśnianin, E.
Zych, B.
Ignac, K.
Powiązania:
https://bibliotekanauki.pl/articles/2087605.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
personal satisfaction
parents
delivery of health care
patient care management
Opis:
Background: The quality of medical services offered is a factor that strongly determines patient satisfaction. Aim of the study: The aim of the study was to evaluate parent’s satisfaction with the care and conditions experienced during their child’s stay in a Pediatric Ward. Material and methods: The study involved 293 parents from two pediatric wards of the Clinical Provincial Hospital No. 2 in Rzeszow. The PASAT PEDIATRIA package was used as a research tool. Results: The functioning of the admission room was good. Parents of children on the Pediatric Ward ranked medical and nursing friendliness the highest (mean = 4.34 and 4.37, respectively), followed by the availability of doctors (mean = 3.97) and the amount of time they devoted to the patient’s family (mean = 3.97). Respondents assessed the ward best in terms of the cleanliness of the room (mean = 4.12) and the possibility of spending free time in an interesting way (mean = 4.07). Conclusions: Parents of children hospitalized in the Pediatric Ward were slightly more satisfied with nursing than medical care. Doctors should make every effort to improve the availability and amount of time devoted to the child’s family. The overall assessment of the conditions in the ward was “fairly good”, indicating the need for monitoring and improvement.
Źródło:
Medical Science Pulse; 2020, 14, 4; 18-24
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Investigation of the Influence of Pulsed Laser Deposited Tin Thin Film Morphology on Deformation Inhomogeneities
Autorzy:
Perzyński, K.
Zych, D.
Sitko, M.
Madej, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/353619.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thin films
pulsed laser deposition
digital material representation
homogenization
finite element method
Opis:
In vestigation of influence of TiN thin film morphology on deformation inhomogeneities is an overall subject of the research. Numerical modelling approach that was selected for the study is based on the digital material representation concept, which gives an opportunity to directly replicate columnar microstructure morphology of an investigated thin film. Particular attention in this paper is put on the discussion of the influence of cellular automata neighbourhood on thin-film digital morphologies and their further deformation behaviour. Additionally, an evaluation of representativeness aspects of the digital models, in particular, the analysis of the influence of a number of columns, their dimensions and variations in their properties on the material behaviour during compression tests is also presented. The non-periodic boundary conditions are assumed during the investigation. Obtained data in the form of equivalent stress distributions as well as homogenized stress-strain curves from analyzed case studies are presented and discussed within the paper.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 713-720
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Composition and the Densification Level of Furan Molding Compounds on the Strength of Large-Size Casting Molds
Autorzy:
Petrus, Ł.
Bulanowski, A.
Kołakowski, J.
Urbanowicz, M.
Sobieraj, J.
Jelonek, M.
Brzeżański, M.
Zych, J. S.
Janerka, K.
Powiązania:
https://bibliotekanauki.pl/articles/356951.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
molding sand
adhesive
densification
properties molding sand
Opis:
The paper presents the test results of molding compounds, sand casting molds and their analysis. The subject of testing was compound containing furan resins prepared according to the following recipe: matrix – regenerate 90% + fresh sand – 10%, furanresin – 1.10% by weight, hardener – 0.40% by weight. The impact of adhesive type and its quantity (Quan = 0.90, 1.1 and 1.5%) on the strength indexes of molding compound subject to densification was analyzed. The publication presents the test results: tensile strength Rm, compressive strength Rc and flexural strength Rg, as well as compound permeability as function of its density. The analysis also covers the impact of density level on mold strength and the distribution of density level along the mold height. Based on the test results, it was found that the best method to obtain high strength molds made from compounds with chemical adhesives was to densify it by vibrating the system: match plate – molding flask – compound filling the mold. The effectiveness of this densification method depends on the amplitude and frequency of vibrations.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1431-1436
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Importance of diet in reducing cancer incidence in Poland: a review
Autorzy:
Zych, M.
Stec, K.
Bablewska, A.
Pilis, K.
Powiązania:
https://bibliotekanauki.pl/articles/874891.pdf
Data publikacji:
2019
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Cancer is one of the leading causes of death in most countries in the world. In Poland, after cardiovascular disease, cancer is the leading cause of death, and the number of malignant tumors has more than doubled in the last three decades. Increased cancer mortality in the immediate future is expected to be mainly associated with lung cancer caused by smoking (both sexes), colorectal cancer (both sexes), breast cancer in women, and prostate cancer in men. It is estimated that 20 to 30% of all malignant tumors are diet-dependent, in which cases the cancer-inducing factors are the nutritional components of the food and the ‘hygiene’ of eating. Research by the Institute of Food and Nutrition in Warsaw indicates that an important factor in the prevention of cancer is also the individual’s state of awareness concerning diet. It is emphasized that running nutritional education programs, especially for children and adolescents, may help to limit the occurrence of diet-dependent cancers in Poland over the next few decades. The aim of this review is to assist the promulgation of knowledge about the importance of a high-quality diet in the prevention of cancer. The need for such knowledge is indicated by the upward trend in the incidence of these types of disease in Poland.
Choroby nowotworowe stanowią jedną z głównych przyczyn zgonów w różnych krajach świata. W Polsce nowotwory obok chorób układu krążenia są jedną z przyczyn największej ilości zgonów, a liczba zachorowań na złośliwe rodzaje tych schorzeń wzrosła ponad dwukrotnie w ciągu ostatnich trzech dekad. Umieralność z powodu prognozowania dotyczące dalszego wzrostu ilości tych zachorowań, związane są głównie z paleniem tytoniu i dotyczą nowotworów jelita grubego u obu płci oraz nowotworów płuca oraz piersi u kobiet, jak również prostaty w populacji mężczyzn. Uznaje się, że około 20 – 30% wszystkich nowotworów złośliwych stanowią nowotwory dietozależne, w których czynnikiem indukującym raka są składniki żywieniowe oraz higiena odżywiania. Badania Instytutu Żywności i Żywienia w Warszawie wskazują, że ważnym czynnikiem profilaktyki zachorowalność na nowotwory złośliwe jest również stan świadomości związanej ze stosowaną dietą. Podkreśla się również, że prowadzenie edukacji żywieniowej już u dzieci i młodzieży może ograniczać występowanie nowotworów dietozależnych w Polsce. Celem niniejszego artykułu jest popularyzacja wiedzy na temat jakości diety stosowanej w profilaktyce chorób nowotworowych, z uwagi na niekorzystną tendencję wzrostową zachorowalności na te rodzaje schorzeń w Polsce.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2019, 70, 4
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Additions to the lichen biota of the Sudety Mountains. I. Records from the Karkonosze Mountains
Autorzy:
Kossowska, M.
Faltynowicz, W.
Dimos-Zych, M.
Faltynowicz, H.
Patejuk, K.
Piegdon, A.
Buksakowska, M.
Jarema, P.
Powiązania:
https://bibliotekanauki.pl/articles/66926.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Botaniczne
Źródło:
Acta Mycologica; 2018, 53, 2
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Halloysite nanotubes as potential carrier for gentamicin
Autorzy:
Stodolak-Zych, E.
Skóra, K.
Rapacz-Kmita, A.
Mikołajczyk, M.
Gajek, M.
Bućko, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/284115.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanotubes
gentamicin
drugs
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 93
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New statistical atlases of voivodships and Poland
Autorzy:
Zych, M.
Medolińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/92562.pdf
Data publikacji:
2018
Wydawca:
Oddział Kartograficzny Polskiego Towarzystwa Geograficznego
Tematy:
atlases
statistical maps
thematic maps
Opis:
In 2018, 100 years had passed since the Central Statistical Office of Poland (since 2017: Statistics Poland – GUS) was established. This anniversary was considered an opportunity for preparation of a series of cartographic publications, i.e. 16 statistical atlases of Polish voivodships (first order administrative units) and the Statistical atlas of Poland. Publication of such a series of atlases is a new undertaking in the history of Polish statistics – it involved both the employees of the head office of Statistics Poland in Warsaw and the staff of statistical offices in 16 voivodships. Until 2018 Polish public statistics did not have many such publications. The first atlas publication of Central Statistical Office was Republic of Poland – statistical atlas released in 1930. The next Statistical atlas, covering all of Poland, was published only in 1970. Subsequent statistical atlases were published over 30 years later – the atlases of five voivodships, published in 2006−2016, and the Demographic atlas of Poland published in 2017. Atlases for individual voivodships were prepared by the relevant regional statistical offices. The project was managed by the head office of Statistics Poland which prepared the guidelines and provided technical and substantive supervision. Due to different sizes of voivodships, the atlases were prepared in scales from 1:900,000 (Opolskie and Świętokrzyskie Voivodships) to 1:1,500,000 (Mazowieckie and Wielkopolskie Voivodships). A standard page contains a map of a voivodship divided into communes (gminas) or counties (powiats) and a map of Poland at the scale of 1:9,500,000 divided into voivodships. The number of pages of the voivodship atlas is 104 with 165 maps: 76 maps of voivodships, 76 maps of Poland, one administrative map of Poland at the scale of 1:3,800,000 and 12 maps of the European Union or Europe at the scale of 1:21,500,000. The Statistical atlas of Poland was published in early July 2018. It consists of 216 pages, with 281 maps (full-page maps of Poland at the scale of 1:3,800,000, quarter-page maps of Poland at the scale of 1:9,000,000, full-page maps of Europe or the European Union at the scale of 1:21,500,000, and half-page world maps at the scale of 1:200,000,000) and 175 charts/graphs. Maps made by using quantitative cartographic presentation methods predominate in the atlas – choropleth and diagram methods are used most frequently (they are observed on 263 maps). Statistical atlases of voivodships and the Statistical atlas of Poland count 1888 pages in total with 2934 maps, on which the development of the country is presented in relation to regional and local conditions. All atlases are bilingual, Polish-English. Publications printing was co-financed from EU funds within the Operational Programme Technical Assistance 2014–2020. Atlases are also available free of charge in the PDF format on the website of Statistics Poland: https://stat.gov.pl/statystyka-regionalna/publikacje-regionalne/podreczniki-atlasy/atlasy/.
Źródło:
Polish Cartographical Review; 2018, 50, 4; 183-196
2450-6974
Pojawia się w:
Polish Cartographical Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The membrane with polylactide and hyaluronic fibers for skin substitute
Autorzy:
Stodolak-Zych, E.
Rozmus, K.
Dzierzkowska, E.
Zych, Ł.
Kapacz-Kmita, A.
Gargas, M.
Kołaczkowska, E.
Cieniawska, M.
Książek, A.
Ścisłowska-Czarnecka, A.
Powiązania:
https://bibliotekanauki.pl/articles/306599.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nanowłókna
elektroprzędzenie
kwas hialuronowy
polilaktyd
nanofibrous scaffold
electrospinning
skin substitute
hyaluronic acid
polylactide
Opis:
Skin substitutes are heterogeneous group of scaffolds (natural or synthetic) and cells. We hypothesize that nanofibers with layer composition made of polylactide (PLA) and sodium hyaluronate (HA) obtained using electrospinning method are a good matrix for cell adhesion and proliferation. Methods: Optimal conditions of electrospinning of PLA and HA nanofibers to create layered compositions (PLA membrane covered with HA nonwovens) were determined by modifying parameters such as the appropriate amount of solvents, polymer concentration, mixing temperature and electrospinning process conditions. By changing the parameters, it was possible to control the diameter and properties of both polymer fibers. The spinning solution were characterized by surface tension and rheology. A scanning electron microscope (SEM) was used to determine the morphology and fiber diameters: PLA and HA. Structure of the PLA/HA nonwoven was analyzed using spectroscopy (FTIR/ATR). Biocompatibility of the nonwoven with fibroblasts (ECM producers) was assessed in the in vitro conditions. Results: The results showed that stable conditions for the formation of submicron PLA fibers were obtained using a 13% wt. solution of the polymer, dissolved in a 3:1 mixture of DCM:DMF at 45 °C. The hyaluronic fibers were prepared from a 12% wt. solution of the polymer dissolved in a 2:1 mixture of ammonia water and ethyl alcohol. All materials were biocompatible but to a different degree. Conclusions: The proposed laminate scaffold was characterized by a hydrophobic-hydrophilic domain surface with a maintained fiber size of both layers. The material positively underwent biocompatibility testing in contact with fibroblasts.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 4; 91-99
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental performance of kettle production: product life cycle assessment
Efektywność środowiskowa produkcji czajników: ocena cyklu życia produktu
Autorzy:
Marcinkowski, A.
Zych, K.
Powiązania:
https://bibliotekanauki.pl/articles/409869.pdf
Data publikacji:
2017
Wydawca:
STE GROUP
Tematy:
comparative analysis
eco-efficiency
environmental management
environmental performance
life cycle assessment (LCA)
production
water boiling process
ocena cyklu życia LCA
produkcja
ekoefektywność
efektywność środowiskowa
zarządzanie środowiskowe
proces gotowania wody
analiza porównawcza
Opis:
The main objective of this paper is to compare the environmental impact caused by two different types of water boiling processes. The aim was achieved thanks to product life cycle assessment (LCA) conducted for stovetop and electric kettles. A literature review was carried out. A research model was worked out on the basis of data available in literature as well as additional experiments. In order to have a better opportunity to compare LCA results with reviewed literature, eco-indicator 99 assessment method was chosen. The functional unit included production, usage and waste disposal of each product (according to from cradle to grave approach) where the main function is boiling 3360 l of water during 4-year period of time. A very detailed life cycle inventory was carried out. The mass of components was determined with accuracy of three decimal places (0.001 g). The majority of environmental impact is caused by electricity or natural gas consumption during usage stage: 92% in case of the electric and kettle and 99% in case of stovetop one. Assembly stage contributed in 7% and 0.8% respectively. Uncertainty and sensitivity analyses took into consideration various waste scenario patterns as well as demand for transport. Environmental impact turned out to be strongly sensitive to a chosen pattern of energy delivery (electricity mix) which determined final comparison results. Basing on LCA results, some improvements of products were suggested. The boiling time optimization was pointed out for electric kettle's efficiency improvement. Obtained results can be used by manufacturers in order to improve their eco-effectiveness. Moreover, conclusions following the research part can influence the future choices of home appliances users.
Głównym celem niniejszego artykułu jest porównanie wpływu na środowisko wywieranego przez dwa różne typy procesu gotowania wody. Cel ten został osiągnięty przez zastosowanie oceny cyklu życia produktu dla czajnika tradycyjnego i elektrycznego. Dokonano przeglądu literatury. Zastosowany model badawczy opracowano na podstawie danych dostępnych w literaturze oraz dodatkowych badań eksperymentalnych. Aby zapewnić możliwość pełniejszego porównania uzyskanych wyników LCA z wynikami literaturowymi, zastosowano metodę oceny ecoindicator 99. Przyjęta jednostka funkcyjna zawiera fazę produkcji, eksploatacji i utylizacji (zgodnie z podejściem „od kołyski do grobu”), gdzie główną funkcją jest zagotowanie 3360 l wody w ciągu czteroletniego okresu czasu. Dokonano bardzo szczegółowej inwentaryzacji LCI. Masa komponentów została wyznaczona z dokładnością do trzeciego miejsca po przecinku (0,001 g). Uzyskane wyniki pokazują, że wpływ na środowisko został zdominowany przez zużycie energii elektrycznej lub gazu ziemnego podczas fazy eksploatacji produktów: 92% w przypadku czajnika elektrycznego i 99% w przypadku tradycyjnego. Udział fazy produkcji wyniósł odpowiednio 7% i 0,8%. Wykonane analizy niepewności i wrażliwości uwzględniały różne modele scenariusza odpadowego, jak również skalę zapotrzebowania na transport. Wpływ na środowisko okazał się być silnie wrażliwy na wybrany koszyk energii elektrycznej (electricity mix), który zdeterminował wyniki ostatecznego porównania czajników. Opierając się na uzyskanych wynikach oceny cyklu życia zaproponowano pewne udoskonalenia produktów. Optymalizacja czasu gotowania została wskazana jako czynnik zwiększający efektywność czajnika. Uzyskane wyniki mogą być wykorzystane przez producentów w celu poprawy ich efektywności środowiskowej. Ponadto, wyciągnięte wnioski mogą mieć wpływ na przyszłe wybory użytkowników urządzeń gospodarstwa domowego.
Źródło:
Management Systems in Production Engineering; 2017, 4 (25); 255-261
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Archaeological fieldwork in Berenike in 2014 and 2015: from Hellenistic rock-cut installations to abandoned temple ruins
Autorzy:
Zych, Iwona
Sidebotham, Steven E.
Hense, Martin
Rądkowska, Joanna K.
Woźniak, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1707815.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
Berenike
Red Sea
port/harbor
Hellenistic fort
water storage
city gate
Roman
timber ship frame
graves
Great Temple
frankincense
Middle Kingdom stele
animal/cat cemetery
Eastern Desert survey
magnetic map
Opis:
The report brings a comprehensive summary of archaeological fieldwork and survey carried out in Berenike on the Red Sea coast of Egypt and in the Eastern Desert hinterland over the course of two seasons in 2014 and 2015. The completed magnetic map of the site is discussed in some detail, assessing the potential for future excavations. The report covers the most important discoveries of the two seasons, which include fragments of Middle Kingdom Pharaonic stelae, possibly pushing back the foundation of the harbor, archaeological evidence of a rock-cut watercollection system forming part of the Hellenistic-age fortifications and two inscribed stone bases, one of which records a secretary of an aromatics warehouse at Berenike, discovered undisturbed in the courtyard of the Great Temple of Berenike (also called the Serapis Temple). A previously unknown religious(?) complex was discovered on the western outskirts of the site thanks to work with Corona satellite imagery. In turn, analysis of the magnetic mapping of the city revealed an administrative(?) complex in the northern part of the town; the later, 5th and 6th century layers were examined inside a chamber with niche forming part of this complex. Work also continued in the early Roman harbor, uncovering among others a complete timber ship frame, and a collection of garnets in subsidiary buildings in the late Roman temenos located in the entrance to the southwestern bay.
Źródło:
Polish Archaeology in the Mediterranean; 2016, 25; 315-348
1234-5415
Pojawia się w:
Polish Archaeology in the Mediterranean
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Berenike Project. Hellenistic fort, Roman harbor, late Roman temple, and other fieldwork: archaeological work in the 2012 and 2013 seasons
Autorzy:
Sidebotham, Steven E.
Zych, Iwona
Rądkowska, Joanna K.
Woźniak, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1727898.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
Berenike
Red Sea
port/harbor
Hellenistic fort
city wall
Roman
temple
animal/cat/ cattle cemetery
Eastern Desert
Opis:
Brief overview of two seasons of archaeological survey and excavation carried out in 2012 and 2013 at the site of Berenike on the Red Sea coast and in two sub-projects in the Eastern Desert: the prehistoric cattle cemetery at Wadi Khashab and the Roman-era emerald mines at Sikait and Nugrus. Highpoints of the work at Berenike included discovery of the Hellenistic fort and fortifications that mark the original settlement of the site in the third quarter of the 3rd century BC, continued clearance of harbor-related structures in the southwestern bay interpreted as the early Roman harbor of Berenike and the uncovering of an earlier phase of the late Roman harbor temple (so-called Lotus Temple) of the 5th–6th century AD in the harbor.
Źródło:
Polish Archaeology in the Mediterranean; 2015, 24(1); 297-324
1234-5415
Pojawia się w:
Polish Archaeology in the Mediterranean
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-penetrating very deep sclerectomy with a hydrophobic polymer implant in a rabbit model
Autorzy:
Leszczyński, R.
Stodolak-Zych, E.
Gumuła, T.
Wieczorek, J.
Kosenyuk, Y.
Pawlicki, K.
Błażewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/307465.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
jaskra
polimery
biomateriały
NPVDS
glaucoma
biocompatible polymers
polymer membranes
non-penetrating very deep sclerectomy
rabbit model
Opis:
Purpose: The aim of the study was to evaluate the influence of an implant made of a terpolymer (PTFE-PVDF-PP) on the condition of rabbit eyes during a one year observation period. Methods: The implant in the shape of an equilateral triangle (3 mm side length) was manufactured from a thin hydrophobic porous membrane. There were evaluated 40 eyes of 20 rabbits. The animals had non-penetrating very deep sclerectomy (NPVDS) performed, with insertion of an implant in the form of a triangular thin membrane. The control group consisted of 20 eyes where the animals had NPVDS performed without implant insertion. The evaluations included the study of the anterior part of the eye together with photographic documentation. Histopathological examination of the eyes 52 weeks after NPVDS procedure has been made. The process of wound healing was comparable in both groups. Results: The evaluation of the rabbits did not reveal any acute process of intraocular inflammation. After 12 month period of observation, no statistically significant differences in the process of wound healing or status of eyes were found between the groups. An analysis of fibrous connective tissue attachment to the implant showed that its layer was not thick and did not differ significantly from the control. The procedure of very deep sclerectomy and insertion of a polymer implant were well tolerated by the rabbit eyes. Conclusions: The in vivo results indicate that the hydrophobic implant in the form of a membrane can serve as a sclera implant after further study.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 3; 23-31
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A nutritional evaluation of dietary behaviour in various professional sports
Autorzy:
Pilis, K.
Michalski, C.
Zych, M.
Pilis, A.
Jelonek, J.
Kaczmarzyk, A.
Pilis, W.
Powiązania:
https://bibliotekanauki.pl/articles/875892.pdf
Data publikacji:
2014
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
athlete
sport
human nutrition
diet evaluation
dietary behaviour
professional sport
race walking
weightlifting
food supplementation
Opis:
Background. The types of physical exertion undertaken by weightlifters and race walkers markedly differ. This difference should also be reflected in their respective diets. Objectives. The aim of the study was to investigate and assess the diets of professional weightlifters and race walkers, along with a comparison to the diets of those students studying physical education (PE). Materials and Methods. Subjects were respectively 12 weightlifters, 12 race walkers and 12 physical education students whose body composition and nutrition were determined by weighing the foods that were both eaten and drunk. Results. The study groups showed body differences, which may have arisen through dietary differences. Higher calorie diets were observed for race walkers according to body mass whilst weightlifters showed no difference with the other groups. Dietary intakes of protein, fat, and carbohydrates were however inappropriate for all groups. Vitamin and mineral intakes in weightlifters and students were within tolerable limits, but the rather aggressive taking of supplements by race walkers resulted in standard/recommended consumption levels being greatly exceeded in some cases. Conclusions. The diets of the study groups of weightlifters and race walkers need to be corrected.
Wprowadzenie. Wysiłki podejmowane przez ciężarowców oraz przez chodziarzy są diametralnie różne i dlatego sposób żywienia powinien być różny w tych grupach. Cel. Celem pracy było zbadanie i ocena sposobu żywienia zawodników uprawiających chód sportowych oraz podnoszenie ciężarów i porównanie go ze sposobem żywienia studentów kierunku wychowania fizycznego. Materiał i metody. W badaniach wzięło udział 12 ciężarowców, 12 chodziarzy i 12 studentów wychowania fizycznego, u których badano skład ciała i sposób odżywiania, poprzez ważenie zjadanych i wypijanych pokarmów. Wyniki. Badane grupy różniły się somatycznie, co mogło być wynikiem różnic w racjach pokarmowych. Chodziarze spożywali posiłki o wyższej wartości energetycznej w odniesieniu do masy ciała niż studenci a ciężarowcy nie różnili się w tym zakresie od pozostałych grup, przy czym proporcje spożywanych białek, tłuszczów i węglowodanów we wszystkich grupach były niewłaściwe. Spożycie witamin i składników mineralnych u ciężarowców i studentów mieściło się w granicach tolerancji, natomiast zbyt agresywna suplementacja stosowana przez chodziarzy doprowadziła w niektórych przypadkach do przekraczania obowiązujących norm. Wnioski. Konieczne jest wprowadzenie korekty do sposobu żywienia badanych sportowców uprawiających zarówno chód sportowy jak i podnoszenie ciężarów.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2014, 65, 3
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
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
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