Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Stodolak, B." wg kryterium: Autor


Wyświetlanie 1-8 z 8
Tytuł:
Wpływ dodatku wytłoków lnianych na potencjał antyoksydacyjny tempe z nasion lędźwianu
Effect of flaxseed oil cake addition on antioxidant potential of grass pea tempeh
Autorzy:
Stodolak, B.
Starzynska-Janiszewska, A.
Wikiera, A.
Powiązania:
https://bibliotekanauki.pl/articles/826895.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
zywnosc funkcjonalna
dodatki do zywnosci
tempeh
ledzwian
nasiona
potencjal przeciwutleniajacy
wytloki lniane
Opis:
Celem pracy było określenie wpływu dodatku wytłoków z nasion lnu, jako kosubstratu nasion lędźwianu w fermentacji typu tempe, na potencjał antyoksydacyjny otrzymanych produktów. Sporządzono 5 rodzajów tempe: z samych nasion lędźwianu oraz z dodatkiem 5, 15, 25 i 35 % wytłoków lnianych. Otrzymane produkty zliofilizowano, odtłuszczono, a następnie sporządzono wodne i wodno-acetonowe (1 : 1, v/v) ekstrakty, w których oznaczono zawartość fenoli, aktywność antyrodnikową (ABTS+• i •OH lub DPPH•) oraz zdolność do redukcji. Zawartość fenoli w ekstraktach wodnych była o 20 ÷ 80 % większa w przypadku produktów zawierających wytłoki lniane w porównaniu z tempe z samych nasion lędźwianu. Ekstrakty te charakteryzowały się również o 50 ÷ 100 % większą aktywnością względem rodnika ABTS+•. Stosunkowo niewielki, 15-procentowy dodatek wytłoków do podstawowego substratu fermentacji spowodował również maksymalny wzrost zdolności do wygaszania rodnika hydroksylowego. Ekstrakty wodne z produktów zawierających 35-procentowy dodatek wytłoków wykazywały o 40 % wyższą i statystycznie istotną (p < 0,05) zdolność do redukcji niż tempe z samych nasion lędźwianu. Zawartość fenoli w ekstraktach wodno-acetonowych była 0,5 ÷ 3,5 razy większa w przypadku produktów z dodatkiem wytłoków lnianych. Ekstrakty te wykazywały również 1,5 ÷ 10 razy większą aktywność względem rodnika DPPH• oraz 1,7 ÷ 3 razy wyższą zdolność do redukcji w porównaniu z produktem powstałym po fermentacji samych nasion lędźwianu. Aktywność antyoksydacyjna była skorelowana z zawartością fenoli, niezależnie od rodzaju zastosowanego ekstrahenta.
The objective of the research study was to determine the effect of flaxseed oil cake, added to grass pea seeds as a tempeh-type fermentation co-substrate, on the antioxidant potential of the products produced. Five types of tempeh were made: one type made from grass pea seeds only and 4 types with the addition of 5, 15, 25, and 35 % of flaxseed oil cake. The products produced were lyophilized, defatted and, next, aqueous and aqueous-acetone extracts (1:1, v/v) were made, and the following was determined therein: content of phenols, antiradical activity (ABTS+• and •OH or DPPH), and reducing power. As for the products containing flaxseed oil cake, the content of phenols in aqueous extracts was 20 – 80 % higher than in the tempeh from grass pea seeds only. Moreover, those extracts were characterized by a 50-100 % higher activity towards ABTS+• radical. Additionally, the addition of only 15% - a relatively low amount - of flaxseed oil cake to the basic fermentation substrate caused a maximal increase in the •OH scavenging activity potential. The reducing power of aqueous extracts from products with 35% of flaxseed oil cake added was 40% higher and statistically significant compared to the tempeh from grass pea seeds. The content of phenols in aqueous-acetone extracts was 0.5 – 3.5 times higher in the products with flaxseed oil-cake added. Additionally, these extracts showed a 1.5 - 10 times higher activity towards DPPH• and a 1.7- 3 times higher reducing power compared to the products produced after the fermentation of grass pea seeds only. The antioxidant activity was correlated with the content of phenols irrespective of the type of the used extract.
Źródło:
Żywność Nauka Technologia Jakość; 2015, 22, 6
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation of composites based on raw materials for orthopedic equipment
Autorzy:
Szaraniec, B.
Morawska-Chochół, A.
Stodolak-Zych, E.
Powiązania:
https://bibliotekanauki.pl/articles/284289.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
composites
degradation
raw material
orthopaedics
Opis:
Eco-composites based on natural raw materials such as polylactide and plant fibres (e.g. flax, hemp, jute) show many important features which enable them to be used as potential materials for biomedical engineering. Availability of the raw materials and low costs of production, capability to enhance mechanical parameters and also controlled time of degradation in the environment allow considering them as materials for rehabilitation equipment, orthopedic supplies or materials for medical packages. Such materials due to the presence of the natural fibres provide higher comfort during their utilization and then they undergo safe biodegradation which is non-harmful for the environment [1,2]. The work presents attempts on fabrication of composites based on polylactide (PLA, Ingeo 3051D, Nature works, USA) reinforced with short flax and jute fibres. The fibres were mechanically comminuted to the length of 1-2 mm. Preparation of PLA/fibres mixture took part in two stages. The first one consisted in drying of the polymer granulate and the fibrous filler at 60 degrees of Celsius for 2 h. The second stage the granulate/fibres mixture was homogenized using vertical screw injection moulding machine (Multiplas). The obtained mixture was mechanically comminuted with a laboratory grinder (Testchem). Volume fraction of the fibres was nit higher then 5 %. The granulates were used to prepare PLA/natural fibres composites in the form of paddle-shaped samples (according to PN-EN ISO 527) by the injection method. The injection took place at 165 degrees of Celsius and pressure of 80 kg/cm2. The samples were subjected to hydrolytic degradation tests (incubation in distilled water at 37 degrees of Celsius, 15 weeks) and biological degradation (composting in an eco-composter, TERMO-410 with the addition of Radvit activator which contains composting bacteria and selected fungi cultures which support biodegradation and accelerate degradation of organic wastes, 15 weeks). The effect of the degradation environment on the composite material was determined on the basis of changes of its mechanical properties (tensile strength, Young's modulus) using an universal testing machine (Zwick 1453). The degradation process was monitored by FT-IR spectroscopy of the composite samples (transmission method, BioRAD 60FT). Changes related to the polymer chain degradation were assessed on the basis of viscosimetric measurements (Hoppler method). The carried out investigations proved, that during both the composting and the incubation in water a gradual degradation of the material takes place. Its visual effect was decrease of the tensile strength of the composites for about 70% for PLA/5% jute and for c.a. 10% for PLA/5% hemp and their Young's modulus for about 25 % for PLA/5% jute and for c.a. 10% for PLA/5% hemp. The changes were caused by decrease of molecular weight (Mn) of the polymer matrix from 100 to 28 kDa for PLA/5% hemp, and from 136 to 48 kDa for PLA/5% jute. The change of the polymer structure was faster in the case of degradation in water environment. This effect was related to facilitated migration of medium (water) inside the material and possibility of washing out and transport of products of the polymer chain disintegration. Additionally, the present fibrous phase which is characterized by high water absorbability may became a reservoir of both the medium and the degradation products. Biodegradation in the compost heap was slower and it was an example of synergic effect of hydrolytic degradation and biodegradation caused by the microorganisms. This process could be observed on the FT-IR spectra recorded during degradation in the compost heap, where longer composting time led to increasing disproportion between bands indicating increasing fraction of hydroxyl, carboxyl and carbonyl groups in relation to groups characteristic for PLA chain. In the case of biodegradation the process progress is related to such variable factors as: amount and type of the bacteria and fungi cultures, humidity and temperature. In conclusion, it may be stated that the proposed PLA/natural fibres composite materials are an alternative solution for many fields of biomedical engineering especially for rehabilitation and orthopedic provision.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 147
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical durability of two external fixator clamps for JAM fixator in small animals
Autorzy:
Szponder, T.
Leś, L.
Szaraniec, B.
Stodolak-Zych, E.
Powiązania:
https://bibliotekanauki.pl/articles/285946.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
JAM fixator
clamps
treatment
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 68
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of repair of osteochondral defects in rabbits using new composite biomaterials during three-month observation
Autorzy:
Żylińska, B.
Stodolak-Zych, E.
Nowicka, K.
Silmanowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/284436.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
osteochondral defects
regenerative medicine
scaffolds
hydroksyapatite
alginate
Opis:
In this work nanocomposite porous pins were implanted into rabbit knees. The pins were made of biodegradable synthetic poly-L/DL-lactide (80:20) which was modified with nanometric hydroksyapatite particles (HAp) and covered with biopolymer layer of sodium alginate (NA). In vivo experiments were conducted on a 4-element group of the New Zealand rabbits. Osteogenesis was observed using scanning electron microscope (SEM/EDS) after 12 weeks of implantation.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 118-119
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of repair of osteochondral defects in rabbits using new composite biomaterials during three-month observation
Autorzy:
Żylińska, B.
Stodolak-Zych, E.
Nowicka, K.
Silmanowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/285641.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
osteochondral defects
regenerative medicine
scaffolds
hydroksyapatite
alginate
Opis:
In this work nanocomposite porous pins were implanted into rabbit knees. The pins were made of biodegradable synthetic poly-L/DL-lactide (80:20) which was modified with nanometric hydroksyapatite particles (HAp) and covered with biopolymer layer of sodium alginate (NA). In vivo experiments were conducted on a 4-element group of the New Zealand rabbits. Osteogenesis was observed using scanning electron microscope (SEM/EDS) after 12 weeks of implantation.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 141-143
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:
Fibrous structures based of natural polymers for tissue engineering applications
Autorzy:
Stodolak-Zych, E.
Ścisłowska-Czarnecka, A.
Kolesinska, B.
Cieślak, M.
Puchowicz, D.
Kaminska, I.
Bogun, M.
Powiązania:
https://bibliotekanauki.pl/articles/285455.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
polymers
tissue engineering
spectroscopy
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 63
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation of nanoclay-filled polylactide composites
Autorzy:
Rapacz-Kmita, A.
Stodolak-Zych, E.
Dudek, M.
Szaraniec, B.
Rozycka, A.
Mosialek, M.
Mandecka-Kamien, L.
Powiązania:
https://bibliotekanauki.pl/articles/110832.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nanocomposite materials
food packaging
polymer
smectite clay
Opis:
Nanoclay-filled polylactide (PLA 3051D) composite materials were tested in this study and their capacity for degradation was investigated. Activated and lyophilized smectite clay was used. The filler, its morphology, and grain size distribution were characterized by the use of transmission electron microscopy, scanning electron microscopy, and the dynamic light scattering technique. Samples of pure polylactide and polylactide filled with 3% wt., 5% wt., and 10% wt. of nanoclay in subsequent series were obtained by injection molding. The optimum amount of the filler in the nanocomposites was evalu-ated based on an assessment of mechanical properties as well as capacity to degrade. The 3% wt. mass fraction of nanofiller in the polylactide matrix was found to be the most effective in enhancement of both tensile strength (RM) and Young’s Modulus (E). It was also reported that polylactide nanocomposites filled with 3% wt. of smectite clay were characterized by the highest decrease in molecular mass of the matrix polymer after degradation tests (6 weeks incubation in water at 80°C). The observed decrease in degradation time and the overall changes distinguished in the nanocomposite structure suggest the poten-tial for application of the material in the packaging industry.
Źródło:
Physicochemical Problems of Mineral Processing; 2013, 49, 1; 91-99
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies