Autor: Kovalenko, I. M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Obtaining New Biopolymer Materials by Electrospinning
Technologia elektroprzędzenia jako perspektywiczna metoda wytwarzania włóknin z biopolimerów
Autorzy:: Bokova, E. S.
Kovalenko, G. M.
Filatov, I. Y.
Pawłowa, M.
Stezhka, K. S.
Powiązania:: https://bibliotekanauki.pl/articles/233909.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:: electrospinning of fibres
collagen hydrolyzate
biopolymer materials
chitosan
elektroprzędzenie włókien
hydrolizat kolagenu
materiały biopolimerowe
chitozan
Opis:: The paper covers aspects of the technology of fibre electrospinning for the production of nonwoven fabrics for various application areas. The conditions of forming nano- and microfibres from solutions of collagen hydrolyzate and dibutyrylchitine were studied as well as polymer-polymer complexes based on polyacrylic acid, polyvinyl alcohol and polyethylene oxide. A comparative analysis of different methods of electrospinning – electrocapillary, electric and NanospiderTM , was conducted. Promising application areas of non-woven fabrics in medicine sanitation as well as for clothing and footwear production are shown.
W artykule przedstawiono aspekty technologii elektroprzędzenia włókien do produkcji włóknin różnego przeznaczenia. Zbadano warunki formowania nano- i mikrowłókien z roztworów hydrolizatu kolagenu, dibutyrylchitinu jak również kompleksów polimer-polimer na bazie kwasu poliakrylowego, alkoholu poliwinylowego i tlenku polietylenu. Przeprowadzono analizę porównawczą różnych metod elektroformowania – elektrokapilarnej, elektroodśrodkowej i Nanospider TM metody. Przedstawiono perspektywiczne obszary zastosowania włóknin w medycynie oraz produkcji obuwia i odzieży.
Źródło:: Fibres & Textiles in Eastern Europe; 2017, 6 (126); 31-33
1230-3666
2300-7354
Pojawia się w:: Fibres & Textiles in Eastern Europe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The formation and structure of clones of forest herbs in ecosystem of north-eastern Ukraine
Autorzy:: Kovalenko, I. M.
Powiązania:: https://bibliotekanauki.pl/articles/100506.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:: forest herbs
population
clone
partial bush
age state
zioło leśne
populacja
kopia
Opis:: The clonal structure of forest herbs of north-eastern Ukraine, such as Aegopodium podagraria L., Asarum europaeum L., Carex pilosa Scop., Stellaria holostea L., has been examined using the total mapping method. The regularities of changes within the radii of clones, density of partial bushes and their age have been found out. The author has suggested an original statistical and graphical method which allows to estimate age state of each clone and make its land zoning.
Źródło:: Geomatics, Landmanagement and Landscape; 2016, 2; 61-76
2300-1496
Pojawia się w:: Geomatics, Landmanagement and Landscape
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Novel potential of pancreatic-like enzymes of microbial origin in exocrine pancreatic insufficiency - study on a pig model
Autorzy:: Szwiec, K.
Goncharova, K.
Velverde-Piedra, J.L.
Ushakova, G.
Kovalenko, T.
Osadchenko, I.
Kardas, M.
Swieboda, P.
Podgurniak, P.
Winiarczyk, M.
Grochowska-Niedworok, E.
Lozinska, L.
Filip, R.
Pierzynowski, S.G.
Powiązania:: https://bibliotekanauki.pl/articles/3181.pdf
Data publikacji:: 2015
Wydawca:: Instytut Medycyny Wsi
Tematy:: pancreatic-like enzyme
microbial enzyme
exocrine pancreatic insufficiency
porcine model
pig
animal model
enzyme activity
Opis:: Introduction. The standard porcine-derived pancreatic enzyme replacement therapy (PERT) is a lifesaving treatment for patients with diseases causing exocrine pancreatic insufficiency (EPI). An attempt to replace PERT with microbial enzymes were undertaken. The aim was to highlight whether the mode of application, mixed with food or applied directly to the stomach, of pancreatic-like enzymes of microbial origin (PLEM) can affect their activity along the gastrointestinal tract. Materials and method. The activity of amylase, lipase and proteinase in the stomach, duodenum and ileum were tested in EPI pigs (n=6) after supplementation of PLEM, either orally – before and during feed consumption – or via the stomach – before and during feed consumption. Healthy pigs not treated with PLEM (n=3) served as controls. Activity of the enzymes measured in the chyme were obtained together with the digesta pH. Activity of the enzymatic residues in the stool samples was also checked. Results. The highest pancreatic enzyme activities were found in the duodenum of the healthy pigs (amylase 162,68 kU/ mL, lipase 507,34 kU/mL and protolitic (trypsin) activity 357,60 kU/mL). Nevertheless, the microbial enzymes remained also active along the entire length of the GIT – including stomach in EPI pigs, regardless of their route of administration. However, activity level was significantly lower. Discussion. Results indicate that the activity pattern of PLEM in the small intestine mimics the activity of the natural endogenous pancreatic enzymes in healthy pigs. The most physiological features of PLEM were observed when enzymes were offered orally. The magnitude of PLEM activity in the stomach of EPI pigs was essential and significantly higher than that measured in healthy pigs, thus being somewhat not physiological, and for health reasons of the patients should be further explored. Interestingly, specific trypsin-like activity was measured in all parts of the GIT after PLEM application. However, proteolytic activity of the experimental proteaze in in vitro studies did not exhibit trypsin-like activity.
Źródło:: Journal of Pre-Clinical and Clinical Research; 2015, 09, 1
1898-2395
Pojawia się w:: Journal of Pre-Clinical and Clinical Research
Dostawca treści:: Biblioteka Nauki

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