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Wyświetlanie 1-13 z 13
Tytuł:
Morphological studies of tissues stabilized by glutaraldehyde and tannic acid
Autorzy:
Turek, B.
Marcinkowski, A.
Cwalina, B.
Nożyński, J.
Dzierżewicz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/286147.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
glutaraldehyde
tannic acid
porcine pericardium
microstructure
nanostructure
Opis:
Despite the disadvantages of glutaraldehyde (GA)-stabilization of tissues, it is the method most often used for xenogeneic tissues preparation. Nowadays, partial elimination of drawbacks of this method is achieved by using GA in the mixture with other crosslinking reagents, which completes the stabilization effects and acts synergistically. The aim of this work was to determine microstructure and nanostructure of porcine pericardium stabilized by GA and tannic acid (TA). The microstructure was examined by optical microscopy and the nanostructure by atomic force microscopy (AFM). Different results on the level of micro- and nanostructure were observed. No essential changes in the tissue morphology after crosslinking with GA and TA were observed under optical microscope, but significant morphological differences were revealed in AFM studies.
Źródło:
Engineering of Biomaterials; 2009, 12, no. 89-91; 32-34
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of cross-linking with glutaraldehyde on adsorption capacity of chitosan beads
Autorzy:
Jóźwiak, Tomasz
Filipkowska, Urszula
Rodziewicz, Joanna
Nowosad, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1035335.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
adsorption
chitosan beads
crosslinking chitosan beads
dyes
glutaraldehyde
Opis:
The study was undertaken to analyze the effect of chitosan cross-linking with glutaraldehyde on the adsorption capacity of chitosan beads during adsorption of Reactive Black (RB5) and Basic Green (BG4) dyes. Analyses were conducted at three pH values: pH 3.0; 5.0 and 9.0. Results obtained were evaluated with the use of four models of adsorption isotherms Freundlich, Langmuir, Double Langmuir and Redlic-Petreson. The cross-linking of beads with glutaraldehyde turned out to be beneficial for the anionic dye RB5. Compared to the non-cross-linked beads, a comparable adsorption capacity (over 500 mg/g d.m.) was obtained at pH 3.0 and pH 5.0. In the case of the cationic dye, chitosan cross-linking reduced the quantity of adsorbed dye, irrespective of the pH value of the adsorption process.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2013, 18, 18; 35-47
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristic of fish collagen films cross-linked with glutaraldehyde
Autorzy:
Kulka-Kamińska, Karolina
Brudzyńska, Patrycja
Sionkowska, Alina
Lewandowska, Katarzyna
Piwowarski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/27324037.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
collagen
glutaraldehyde
cross-linking
polymer films
marine sources
kolagen
biomateriały
polimery
Opis:
Collagen is a valuable biopolymer in many fields, especially in biomedical sciences. Thanks to its biodegradability and high biocompatibility, it is a desirable material for applications that require contact with the human body. There are many sources of collagen, of which marine-origin collagen has become an important one in recent times. Pure collagen has poor stability and is sensitive to the effects of heat and other external factors. The cross-linking process can improve the properties of collagen materials. Many different methods of cross-linking can be distinguished, including chemical ones. In this study, we were concerned to obtain collagen films modified with glutaraldehyde (GTA). The influence of this additive on the chemical, mechanical, swelling, and hydrophilic properties of the biopolymeric matrix was evaluated. Two different concentrations of collagen were used, as well as three different concentrations of GTA. Results of the analysis showed that the properties of the obtained films were affected by the addition of even a small amount of cross-linker. Spectroscopic measurements indicated minor changes that reflect interactions between GTA and the collagen matrix. Mechanical tests showed changes for modified samples in values of tensile strength, breaking force, and elongation at break. The hydrophilicity decreased slightly for films with GTA. The durability of the modified samples in the swelling test increased. Differences between 1% and 2% collagen films with additives were also observed. The GTA-obtained fish collagen films can be promising materials for biomedical applications.
Źródło:
Engineering of Biomaterials; 2023, 26, 168; 25--32
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bakteriobójcze działanie aldehydu glutarowego w stosunku do form wegetatywnych bakterii
Bactericidal activity of glutaraldehyde on the vegetative forms of bacterie
Autorzy:
Krzywicka, H.
Powiązania:
https://bibliotekanauki.pl/articles/872464.pdf
Data publikacji:
1970
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
bakterie
formy wegetatywne
dzialanie bakteriobojcze
aldehyd glutarowy
stezenie
substancje bakteriobojcze
srodki dezynfekcyjne
mikroorganizmy
bacteria
vegetative form
bactericidal activity
glutaraldehyde
concentration
disinfectant
microorganism
Źródło:
Roczniki Państwowego Zakładu Higieny; 1970, 21, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chitosan/poly(vinyl alcohol) hydrogels as controlled drug delivery systems
Autorzy:
Kocemba, Aleksandra
Mucha, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1034608.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan/PVA hydrogel
gentamicin
glutaraldehyde
release kinetics
swelling
Opis:
In order to achieve hydrogel and drug release profiles, a comprehensive knowledge of the types, properties and syntheses of hydrogel polymer networks are needed. For this reason, a natural biopolymer hydrogel based on chitosan was described. Chitosan has many advantages, which meet the requirements necessary for the preparation of medical materials; for example, wound dressings. This article focused on the biomedical use of a chitosan hydrogel: chitosan–poly(vinyl alcohol) (PVA). The method of preparation of hydrogels containing a drug as an active wound dressing was described. To obtain a hydrogel dressing to be applied in patients with burns or difficult curative wounds, gentamicin (an aminoglycoside antibiotic) was used as a medicament. The effect of the PVA concentration in hydrogels on the release rate of the antibiotic was examined. For this, the crosslinking agent of the hydrogel, glutaraldehyde, was used. The release process of gentamicin was described by using an equation of first order kinetics.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 97-105
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Amano Lipase A grafting onto a silica surface
Autorzy:
Zdarta, J.
Jesionowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/81057.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Amano Lipase A
immobilization
grafting
silica surface
biocatalyst
hydrolysis
tetraethoxysilane
glutaraldehyde
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grzybobójcza aktywność aldehydu glutarowego
Fungicidal activity of glutaraldehyde
Autorzy:
Tadeusiak, B.
Powiązania:
https://bibliotekanauki.pl/articles/875678.pdf
Data publikacji:
1976
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
aldehyd glutarowy
stezenie
wyjalawianie
aktywnosc bakteriobojcza
srodki dezynfekcyjne
substancje bakteriobojcze
mikroorganizmy
metody zawiesinowe
Źródło:
Roczniki Państwowego Zakładu Higieny; 1976, 27, 6
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of dye adsorption onto non-cross-linked and cross-linked chitosan beads
Autorzy:
Filipkowska, Urszula
Powiązania:
https://bibliotekanauki.pl/articles/1035401.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
adsorption
chitosan beads
cross-linked chitosan beads
dyes
glutaraldehyde
Opis:
The study was established to analyze the effectiveness of Reactive Black (RB5) and Basic Green (BG4) dyes adsorption onto chitosan beads and onto chitosan beads cross-linked with glutaraldehyde depending on the initial dye concentration in the solution (1, 5, 100 and 200 mg/dm3). It demonstrated that both the initial concentration of dye in the solution as well as the type of adsorbent affected the effectiveness of the adsorption process. An increase in the initial dye concentration in the solution was increasing adsorption effectiveness, irrespective of the type of dye and adsorbent. The cross-linking of chitosan beads with glutaraldehyde turned out to be beneficial only in the case of the RB5 dye.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2012, 17; 43-52
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of cross-linked chitosan for phosphate removal from aqueous solutions
Autorzy:
Filipkowska, Urszula
Jóźwiak, Tomasz
Szymczyk, Paula
Powiązania:
https://bibliotekanauki.pl/articles/1035181.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
adsorption
chitosan
cross-linked chitosan
epichlorohydrin
glutaraldehyde
phosphates
Opis:
This study investigated the effectiveness of phosphate adsorption onto non-cross-linked chitosan beads [CHs], and onto chitosan beads cross-linked with glutaraldehyde [ALD-CHs] and epichlorohydrin [ECH-CHs]. The weight ratio of glutaraldehyde to chitosan was 1:2 (w/w), whereas that of epichlorohydrin to chitosan was 2:1 (w/w). The optimal pH value of the phosphate adsorption process was determined at pH 3 for cross-linked chitosan and at pH 4 for noncross- linked chitosan. The time needed to reach the equilibrium concentration reached 60 min for both adsorbents. Experimental data were described with the heterogeneous Langmuir model (double Langmuir equation). The most effective adsorbent of phosphates was shown to be chitosan cross-linked with epichlorohydrin [ECH-CHs] - for which the adsorption capacity reached 139.4 mg/g d.m.CHs. In the case of the remaining adsorbents (chitosan [CHs] and chitosan crosslinked with glutaraldehyde [ALD-CHs]) the adsorption capacity was lower and accounted for 44.38 mg/g d.m.CHs and 108.24 mg/g d.m.CHs, respectively.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2014, 19; 5-14
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and swelling properties of hydrogel membranes based on chitosan crosslinked with glutaraldehyde and sodium tripolyphosphate
Autorzy:
Gierszewska-Drużyńska, Magdalena
Ostrowska-Czubenko, Jadwiga
Powiązania:
https://bibliotekanauki.pl/articles/1035178.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan
crosslinking
membranes
swelling kinetics
Opis:
Chemically and physically crosslinked chitosan hydrogel membranes were obtained by treatment of chitosan (Ch) with glutaraldehyde (GA) and with GA and subsequently with sodium tripolyphosphate (TPP). The formation of covalent and ionic crosslinks between Ch, GA and ionic TPP was confirmed by FTIR spectroscopy. The studies of dynamic swelling behaviour of synthesized membranes in buffer solutions of different pH (1.0, 7.4, 9.0) indicated that the swelling process obeyed a second-order kinetics. Values of an apparent swelling rate constant for Ch/GA and Ch/GA/TPP membranes were of the same order for acidic and neutral swelling media but they increased for alkaline solutions.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 43-53
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concomitant sensitization to glutaraldehyde and methacrylic monomers among dentists and their patients
Współistniejące uczulenie na aldehyd glutarowy i monomery metakrylanowe u stomatologów i ich pacjentów
Autorzy:
Lyapina, Maya G.
Dencheva, Maria
Krasteva-Panova, Assya
Tzekova-Yaneva, Mariana
Deliverska, Mariela
Kisselova-Yaneva, Angelina
Powiązania:
https://bibliotekanauki.pl/articles/2164298.pdf
Data publikacji:
2016-05-31
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
stomatolodzy
aldehyd glutarowy
współistniejąca alergia kontaktowa
monomery metakrylanowe
studenci stomatologii
uczniowie technikum dentystycznego
dental professionals
glutaraldehyde
concomitant contact sensitization
methacrylic monomers
students of dental medicine
students of dental technician school
Opis:
Background A multitude of methacrylic monomers is used in dentistry. Glutaraldehyde (G) is used in dental practice and consumer products as a broad-spectrum antimicrobial agent. The purpose of our study is to evaluate the frequency and the risk of concomitant sensitization to some methacrylic monomers (methyl methacrylate (MMA), triethyleneglycol dimethacrylate (TEGDMA), ethyleneglycol dimethacrylate (EGDMA), 2,2-bis-[4-(2-hydroxy-3-methacrylo-xypropoxy)phenyl]-propane (Bis-GMA), 2-hydroxy-ethyl methacrylate (2-HEMA) and tetrahydrofurfuryl methacrylate (THFMA)) and glutaraldehyde in students of dentistry, students from the dental technician school, dental professionals and dental patients. Material and Methods A total of 262 participants were included in the study: students of dentistry, students from the dental technician school, dental professionals, and dental patients as a control group. All were patch-tested with methacrylic monomers and glutaraldehyde. The results were subject to the statistical analysis (p < 0.05). Results Among the group of dental students, the highest frequency of concomitant sensitization was to TEGDMA and G (15.5%). In the group of patients the highest frequency of concomitant sensitization was to EGDMA and G (16.4%). The frequency of concomitant sensitization among dental professionals was much lower, with the highest rate to TEGDMA and G (7.7%), too. We consider the students from the dental technician school, where the exposure to glutaraldehyde is less likely, to be the group at a lesser risk of concomitant sensitization. Conclusions Dental students and dental patients could be outlined as groups at the risk of concomitant sensitization to glutaraldehyde and methacrylic monomers. For dental professionals, we assumed an increased risk for concomitant sensitization to TEGDMA and aldehydes that are commonly used in dentistry. We consider the students from the dental technician school to be the group at a lesser risk of concomitant sensitization to glutaraldehyde and methacrylic monomers. Med Pr 2016;67(3):311–320
Wstęp W stomatologii stosuje się wiele monomerów metakrylanowych, a także aldehyd glutarowy (G), który wchodzi w skład powszechnie dostępnych wyrobów jako środek przeciwbakteryjny. Celem badania była ocena częstości i ryzyka współistniejącego uczulenia u studentów stomatologii, uczniów technikum dentystycznego, lekarzy stomatologów i pacjentów gabinetów dentystycznych na aldehyd glutarowy i niektóre monomery metakrylanowe (metakrylan metylu (methyl methacrylate – MMA), dimetakrylan glikolu trietylenowego (triethyleneglycol dimethacrylate – TEGDMA), dimetakrylan glikolu etylenowego (ethyleneglycol dimethacrylate – EGDMA), 2,2-bis[4-(2-hydroksy-3-metakryloksypropoksy)fenylo]propan (2,2-bis-[4-(2-hydroxy-3- methacrylo-xypropoxy)phenyl]-propane – Bis-GMA), metakrylan 2-hydroksy-etylu (2-hydroxy-ethyl methacrylate – 2-HEMA) i metakrylan tetrahydrofurfurylu (tetrahydrofurfuryl methacrylate – THFMA)). Materiał i metody Badaniem objęto 262 osoby – studentów stomatologii, uczniów technikum dentystycznego i lekarzy stomatologów oraz pacjentów gabinetów dentystycznych jako grupę porównawczą. U wszystkich badanych wykonano testy płatkowe z monomerami metakrylanowymi i aldehydem glutarowym. Uzyskane wyniki poddano analizie statystycznej (p < 0,05). Wyniki Najwięcej studentów stomatologii było uczulonych jednocześnie na TEGDMA i G (15,5%), natomiast najwięcej pacjentów – na EGDMA i G (16,4%). Współistniejące uczulenie u lekarzy stomatologów występowało znacznie rzadziej niż w powyższych grupach – badani najczęściej byli uczuleni jednocześnie na TEGDMA i G (7,7%). W grupie najniższego ryzyka uczulenia współistniejącego znaleźli się uczniowie technikum dentystycznego, u których narażenie na aldehyd glutarowy jest mniej prawdopodobne. Wnioski Studentów stomatologii i pacjentów gabinetów dentystycznych można uznać za grupy ryzyka uczulenia współistniejącego na aldehyd glutarowy i monomery metakrylanowe, lekarzy stomatologów za grupę podwyższonego ryzyka uczulenia współistniejącego na TEGDMA i aldehydy powszechnie stosowane w stomatologii, natomiast uczniów technikum dentystycznego za grupę niskiego ryzyka uczulenia współistniejącego na aldehyd glutarowy i monomery metakrylanowe. Med. Pr. 2016;67(3):311–320
Źródło:
Medycyna Pracy; 2016, 67, 3; 311-320
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of cross-linked chitosan for nitrate nitrogen (v) removal from aqueous solutions
Autorzy:
Jóźwiak, Tomasz
Filipkowska, Urszula
Szymczyk, Paula
Mielcarek, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1035179.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
adsorption
chitosan beads
cross-linked chitosan beads
dyes
glutaraldehyde
Opis:
This study was aimed at determining the possibility of applying non-cross-linked chitosan (CHs) as well as chitosan cross-linked with glutaraldehyde (CHs-GLA) and epichlorohydrin (CHSECH) for the removal of nitrates (V) from aqueous solutions. The scope of the study included determinations of: optimal pH value of nitrates sorption (from pH range of 2-11), equilibrium time of sorption process, and maximum N-NO3 sorption capacity of the analysed chitosan sorbents. Kinetics of nitrates sorption was described with pseudo-first and pseudo-second order equations, and with the intraparticle diffusion model. Sorption capacity analysis was conducted with the heterogeneous Langmuir model, the double Langmuir model and the Freundlich model. The optimal pH value of N-NO3 sorption onto CHs-GLA and CHs-ECH was pH 3, whereas onto CHs this was pH 4. The equilibrium time of sorption reaction was the same for all chitosan sorbents and reached 120 min. The maximum sorption capacity of CHs, CHs-GLA and CHs- ECH accounted for 12.71 mg N-NO3/g, 34.99 mg N-NO3/g and 38.47 mg N-NO3/g.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2014, 19; 41-52
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
State of water in noncrosslinked and crosslinked hydrogel chitosan membranes – dsc studies
Autorzy:
Ostrowska-Czubenko, Jadwiga
Pieróg, Milena
Gierszewska-Drużyńska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1035477.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
DSC
chitosan membranes
crosslinking
glutaraldehyde
states of water
trisodium citrate.
Opis:
Modified chitosan hydrogel membranes were prepared using glutaraldehyde (GA) and sodium citrate (NaCIT) as crosslinking agents. Molecular and supermolecular structure analyses of unmodified and modified chitosan membranes have been conducted by FTIR and X-ray spectroscopy. FTIR results showed covalent and ionic crosslinks formation between chitosan (Ch) and GA or simultaneously Ch, GA and NaCIT. The state of water in noncrosslinked and crosslinked chitosan membranes were analysed by differential scanning spectroscopy (DSC). Three types of water in hydrogel membranes were found: non-freezing bound water, freezing bound water and freezing free water, while there were variations in the amount of non-freezing bound water in these polymers. The effect of ionic crosslinking on water state, mainly on the nonfreezing water content, was discussed.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2011, 16; 147-156
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-13 z 13

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