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1

Sustained Release of Drug Facilitated Through Chemically Crosslinked Polyvinyl Alcohol-Gelatin (PVA-GE) Hydrogels. A sustainable biomedical approach

Ali Shaukat, Ranjha Nazar Muhammad, Ahmad Bashir, Khan Ayaz Ali, Hassan Fakhr Ul, Aziz Tariq, Alharb Metab, Alshammari Abdulrahman, Alasmari Abdullah F., Alharbi Mousa Esa

Polish Journal of Chemical Technology

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2023

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Vol. 25, nr 2

56--65

EN

The present study aimed to prepare hydrogel based on polyvinyl alcohol (PVA) and gelatin (Ge) and characterization of PVA/Ge hydrogel for their potential use as a sustained drug delivery system. Polyvinyl Alcohol (PVA) and-Gelatin (Ge) were cross-linked using glutaraldehyde (GA) as a crosslinking agent and hydrochloric acid (HCl) as a catalyst. Different feed polymer ratio and crosslinking agent concentration were used to prepare a series of PVA/Ge hydrogels. The obtained PVA/Ge hydrogels were investigated for dynamic and equilibrium swelling studies. The effect of polymers ratio, degree of crosslinking and pH of the medium on swelling of PVA/Ge hydrogels was investigated. Furthermore, the values of diffusion coeficient (D), volume fraction, polymer-solvent interaction parameter, molecular weight between crosslink and crosslink density were calculated. For swelling studies, 0.05M USP phosphate buffer solutions of different pH (1.2, 5.5, 6.5 and 7.5) were used. For the drug release study, ciprofloxacin HCl was loaded into selected samples as a model drug. The release of drug from these samples was performed for 12 hours in USP phosphate buffers of pH 1.2, 5.5 and 7.5. The release data from these samples were fitted into various kinetic models like zero order, first order, Higuchi and Peppas models to investigate the release mechanism. It was found that by varying the composition of PVA/Ge hydrogel and GA concentration, a significant difference was observed in drug release kinetics. FTIR spectroscopy and X-ray diffraction were used for the characterization of hydrogels. PVA/Ge hydrogel showed sustained release of the model drug at various pH values suggesting its potential use as a sustained drug delivery system.

2

Immobilization with Ca–Alg@gelatin hydrogel beads enhances the activity and stability of recombinant thermoalkalophilic lipase

Yildiz Dalginli Kezban, Atakisi Onur

Chemical and Process Engineering : New Frontiers

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2023

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Vol. 44, nr 1

art. no. e2

EN

This study aims at the immobilization and characterization of thermoalkalophilic lipases produced recombinantly from Bacillus thermocatenulatus BTL2 and Bacillus pumilus MBB03. For this purpose, immobilization of the produced enzymes in calcium-alginate@gelatin (Ca–Alg@gelatin) hydrogel beads, immobilization optimization and characterization measurements of the immobilized-enzyme hydrogels were conducted. Optimum temperature and pH values were determined for B. thermocatenulatus and B. pumilus MBB03 immobilized-enzyme hydrogels (60–70 °C, 55 °C and pH 9.5, pH 8.5). Thermal stability was determined between 65 °C and 60 °C of B. thermocatenulatus and B. pumilus MBB03 immobilized enzymes, respectively. The pH stability was determined between pH 7.0–11.0 at +4°C and pH 8.0–10.0 at +4 °C, respectively. In conclusion, the entrapment technique provided controlled production of small diameter hydrogel beads (~ 0:19 and ~ 0:29) with negligible loss of enzyme. These beads retained high lipase activity at high pH and temperature. The activity of Ca–Alg@gelatin-immobilized lipase remained relatively stable for up to three cycles and then markedly decreased. With this enzyme immobilization, it may have a potential for use in esterification and transesterification reactions carried out in organic solvent environments. We can conclude that it is one of the most promising techniques for highly efficient and economically competent biotechnological processes in the field of biotransformation, diagnostics, pharmaceutical, food and detergent industries.

3

Synteza i charakterystyka materiałów hydrożelowych modyfikowanych ekstraktem Calendula officinalis przeznaczonych do leczenia oparzeń skóry

Jamroży Mateusz, Głąb Magdalena

Inżynieria Materiałowa

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2022

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Vol. 43, nr 2

5--11

PL

Materiały hydrożelowe stanowią grupę polimerów o dużym potencjale aplikacyjnym, a jedną z ich unikatowych właściwości jest zdolność odwracalnego pochłaniania różnorodnych płynów. Ponadto materiały te można w łatwy sposób modyfikować z wykorzystaniem substancji pochodzenia naturalnego bądź syntetycznego. W pracy opisano badania, podczas których opracowano hydrożele chitozanowe zawierające dodatek w postaci ekstraktu z nagietka (Calendula officinalis). Następnie scharakteryzowano strukturę otrzymanych materiałów za pomocą spektroskopii FT-IR, zweryfikowano ich zdolności sorpcyjne w symulowanych płynach fizjologicznych oraz ich zachowanie w środowisku tych płynów, przy czym skupiono się przede wszystkim na ocenie wpływu wprowadzonego ekstraktu na właściwości fizykochemiczne hydrożeli. Dowiedziono, że opracowane materiały charakteryzują się zdolnością do pęcznienia w badanych płynach, a także że są względem nich biokompatybilne. Wykazano tym samym, że badane hydrożele mają potencjał do zastosowań biomedycznych, zwłaszcza jako innowacyjne opatrunki wzbogacone ekstraktem o właściwościach terapeutycznych oraz chłonące wysięk z rany.

EN

Hydrogel materials constitute a group of polymers with a great application potential while one of their unique properties is a capability of reversible sorption of various liquids. Moreover, these materials may be easily modified with the use of substances of natural or synthetic origin. In this work, chitosan-based hydrogels containing Calendula officinalis extract have been developed. Next, their structure has been characterized via FT-IR spectroscopy. Additionally, their sorption properties as well as the behavior in simulated physiological liquids has been verified while the main focus was on determining the impact of introduced extract on physicochemical properties of the hydrogels. It was demonstrated that developed materials were characterized by the swelling properties in tested media, and were biocompatible towards them. Thus, it was proved that the hydrogels showed a potential for application for biomedical purposes, in particular as innovative dressing materials enhanced with extract with therapeutical properties and with an ability to absorb wound exudate.

4

Optimization of the preparation process stages of the bioink compositions based on sodium alginate and gelatin to improve the viability of biological material contained in hydrogel 3d printouts

Wierzbicka Adrianna, Bartniak Mateusz, Rosińska Karolina, Bociąga Dorota

Engineering of Biomaterials

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2022

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vol. 25, no. 165

7--16

EN

Currently developing on a large scale, the opportunities for 3D printing represent more and more perspective solutions in the area of tissue engineering and personalized medicine. Due to their ability to reproduce the natural extracellular matrix and unique properties, hydrogels are popularly used materials to produce bioinks designated for 3D printing. Today, solutions based on sodium alginate and gelatin are frequently used compositions for this purpose. The high viability of the cells incorporated into bioink is the key parameter determining the application opportunities of printed structures. The parameters of the process used for the preparation of hydrogel compositions may have a direct impact on the viability of the cells incorporated within the printed structure. This study aims to develop a protocol for the preparation of hydrogel materials based on alginate and gelatin, providing the highest viability of the model osteoblast-like cell line Saos-2 incorporated directly into the bioink before the 3D bioprinting process. In the scope of this study, the analyzed process parameters of the preparation of the hydrogel bioinks are the method of combination of a polymer solution with biological material, the applied concentration, the cross-linking solution, and also the waiting time of the prepared hydrogel bioink for the 3D printing process. A key aspect of the study is the evaluation of the influence of 3D printing on changes in the survival rate of biological material directly after the manufacturing process and after individual incubation periods of the printouts in conditions reflecting the body’s environment.

5

Composite scaffolds enriched with calcium carbonate microparticles loaded with epigallocatechin gallate for bone tissue regeneration

Pietryga Krzysztof, Panaite Anca-Alexandra, Pamuła Elżbieta

Engineering of Biomaterials

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2022

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vol. 25, no. 166

12--21

EN

There is a need to develop advanced multifunctional scaffolds for the treatment of bone tissue lesions, which apart from providing support for infiltrating cells could assure the delivery of drugs or biologically active molecules enhancing bone formation. We developed composite scaffolds for bone tissue engineering based on gellan gum (GG) and gelatin (Gel) hydrogel enriched with epigallocatechin gallate (EGCG) loaded CaCO3 microparticles and subjected to enzymatic mineralization with calcium phosphate (CaP). The method of manufacturing CaCO3 microparticles was optimized. The EGCG-loaded microparticles were smaller than those unloaded, and the release of EGCG was prolonged for up to 14 days, as shown by the Folin-Ciocalteu test. The particles reduced the viability of the MG-63 cells as compared to the control. However, when they were loaded with EGCG, their cytotoxicity was reduced. The particles were suspended in a GG/Gel hydrogel containing alkaline phosphatase (ALP), soaked in calcium glycerophosphate (CaGP) solution to create CaP deposits, and submitted to freeze-drying, in order to produce a porous scaffold. The microstructure of the scaffolds was characterized by optical and scanning electron microscopy and showed that the size of the pores corresponds to that of the spongy bone. In vitro tests with MG-63 cells confirmed that mineralized scaffolds support cell adhesion and growth to a higher extent than nonmineralized ones.

6

Synergistic effect of selenium and genipin triggers viability of 3T3 cells on PVA/Gelatin scaffolds

Erdag Demet, Koc Serkan N., Oksuzomer M. Faruk, Yalcintepe Leman

Acta of Bioengineering and Biomechanics

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2022

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Vol. 24, no. 1

179--190

EN

The aim of this study was to reveal the first time synergistic effect of GP and selenium (Se) on 3T3 cells seeded on natural and non-cytotoxic porous scaffolds with poly(vinyl alcohol) (PVA) and gelatin (GE). Methods: Electrospinning scaffolds were produced as PVA/GE/GA crosslinked with glutaraldehyde (GA) and freeze/dried scaffolds crosslinked with genipin (GP) were divided into two groups as PVA/GE/GP5 and PVA/GE/GP8. The scaffolds were investigated in terms of pore morphology, swell ratio, biodegradation, and biocompatibility. The biocompatibility of the material was tested in vitro by MTT assay on 1, 2, and 3 days to test the cell viability of 3T3 cells. Results: It was observed that Se triggered the excellent cell growth and proliferation on electrospinning and freeze drying PVA/GE scaffolds. Conclusions: Selenium with PVA/GE scaffolds can be a promising candidate for wound healing application, as it significantly increases cell viability on scaffolds. It is thought that the synergistic effect of selenium with genipin may be an important step in tissue engineering applications. The preliminary study can be supported by in vivo studies in the future.

7

Assessment of the microstructure and mechanical properties of porous gelatin scaffolds

Morawska-Chochół Anna

Engineering of Biomaterials

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2021

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Vol. 24, no. 160

22--27

EN

Gelatin scaffolds are in the interest of tissue engineering and drug release. The scaffold porosity and microarchitecture are of great importance in proper tissue regeneration. In this work, the freeze-drying method was used to produce the scaffolds. The effect of concentration of the initial gelatin solution and pre- -freezing temperature on the scaffold’s microstructure and microarchitecture (porosity, pores size, shape, and distribution) was evaluated. The mechanical tests of samples were performed. Moreover, the influence of the gentamicin sulphate addition on the gelatin scaffolds microstructure and mechanical properties was also studied. The linear relationship of porosity to the concentration of the initial solution was observed. Therefore, it is possible to obtain a scaffold with a planned porosity. Pores were interconnected with an aspect ratio between 1.5-1.8. For porosity 74 ± 9% the average pore size was 0.7 ± 0.6 mm, with most pores in the range 0.2-0.4 mm. For the samples with porosity 57 ± 14%, the average pore size was 0.2 ± 0.2 mm, with most pores in the range 0.05-0.2 mm. The process of pre-freezing the solution in liquid nitrogen caused the highest porosity of the sample, the smaller pores size and the lower pores size distribution in comparison to the sample pre-frozen in -20°C. The mechanical parameters for all the samples are sufficient for filling bone defects. The addition of a drug to gelatin caused only slight changes in the pore architecture. This material could be applied as a scaffold in the bone loss correlated to bacterial infection.

8

Fabrication of Multifunctional Nano Gelatin/Zinc Oxide Composite Fibers

Zare Hamed, Nayebzadeh Shahnaz, Davodiroknabadi Abolfazl, Hataminasab Sayyed Hasan

Autex Research Journal

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2021

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Vol. 21, no. 4

403--407

EN

According to health studies, reinforcing gelatin is necessary in order to obtain the multifunctional material. In this study, nano zinc oxide (ZnO; at concentrations of 0.5%, 1% and 1.5%) was doped with gelatin and the solution was electrospun under specific conditions to obtain multifunctional gelatin/ZnO nanofibers. The morphology of the nanofibers was studied by field emission scanning electron microscope (FESEM), and energy-dispersive X-ray spectrometry (EDX) analysis indicated the presence of nano Zn on the surface of gelatin fibers. On the contrary, elemental mapping analysis proved the distribution of nano material along the nano gelatin fibers. The results show that the produced nano gelatin/ZnO composite increases the ultraviolet (UV) blocking of fabric significantly. It is also observed that electrospun gelatin/ZnO nanofibers have excellent bactericidal property against both Bacillus cereus (Gram-positive) and Escherichia coli (Gram-negative) bacteria.

9

New composites based on bacterial nanocellulose and gelatin

Sionkowska Alina, Mężykowska Oliwia, Saha Nabanita, Menaszek Elżbieta

Engineering of Biomaterials

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2020

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Vol. 23, no. 158 spec. iss.

8

10

Dual cross-linking as a method of improving mechanical properties of gelatin-alginate hydrogels

Tuszyńska Marta, Skopińska-Wiśniewska Joanna

Engineering of Biomaterials

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2020

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Vol. 23, no. 158 spec. iss.

28

11

Fabrication and properties of βTCP/Zeolite/Gelatin scaffold as developed scaffold in bone regeneration: in vitro and in vivo studies

Yazdanian Mohsen, Tabesh Hadi, Houshmand Behzad, Tebyanian Hamid, Soufdoost Reza Sayyad, Tahmasebi Elahe, Karami Ali, Ghullame Sayede

Biocybernetics and Biomedical Engineering

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2020

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Vol. 40, no. 4

1626--1637

EN

Synthetic scaffolds, as an alternative to allograft and xenograft scaffolds, are suitable for bone regeneration. This study aimed to synthesize a composite biomaterial of zeolite and beta-tricalcium phosphate (bTCP) to obtain a biocompatible material with physical and mechanical properties in bone regeneration. One scaffold without zeolite (bZG 0) and two scaffolds with different amounts of zeolite (bZG 1 and bZG 2) were synthesized. The scaffolds were evaluated by FTIR, XRD, compressive strength test, MTT assay, and radiographic and histological analyses. The XRD results confirmed the presence of bTCP and ZSM-5 phases in the composite scaffolds and also, indicated that the addition of gelatin decrease the crystallinity of composite scaffolds. FTIR revealed the gelatin, b-TCP and ZSM-5 functional groups in the composite structure. bZG 2 group had the maximum porosity among the scaffolds (74%) ranging in size from 61-600 mm. Compressive strength test showed that the Young's modulus changed from 23 MPa to 59 MPa, and the zeolite nanostructure was the most influential factor responsible for this change. The MTT assay showed the superiority of bZG 2, and the macroscopic and microscopic results at 4, 8, and 12 weeks revealed the maximum bone regeneration and formation of bone trabeculae in the bZG 2 and bZG 1 groups, respectively. The zeolite scaffold showed the superior mechanical, radiographic and histological properties compared with the control and non-zeolite scaffold. bTCP/ Zeolite/ Gelatin scaffold can be an appropriate candidate for medical application in bone regeneration.

12

Wpływ dodatku kwasu deoksyrybonukleinowego (DNA) na właściwości mechaniczne żeli żelatynowych

Głazowska Joanna, Tylingo Robert, Bartoszek Agnieszka

Przemysł Chemiczny

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2019

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T. 98, nr 8

1224--1229

PL

Kwasy nukleinowe cieszą się coraz większym zainteresowaniem pod względem zastosowania ich w przemyśle farmaceutycznym, kosmetycznym oraz żywnościowym. Określono wpływ dodatku długo- i krótkołańcuchowych kwasów nukleinowych na właściwości mechaniczne żeli żelatynowych. Badania wykazały występowanie specyficznych interakcji pomiędzy żelatyną a kwasami nukleinowymi oraz pozwoliły na ocenę wpływu tych oddziaływań na twardość, kohezyjność, gumowatość oraz lepkość żeli.

EN

Two pork gelatin solns. were prepd. in deionized H2O (6.66 and 10% by mass) at 65°C and then gelled at 10°C for 24 h. The well-defined portions of the gelatin were added to solns. of two types of nucleic acids (short- and long-chain, gDNA and fDNA, resp.) dissoloved in a buffer (Tris-HCl and EDTA, pH 7.5) and mixed with deionized H2O to obtain concns. in the range of 0.001–0.1% by mass. The hardness, cohesiveness, elasticity, gumminess and viscosity at 40°C of obtained gelatin gels were detd. The mech. parameters of gelatin gels were deteriorated in the presence of gDNA but an improvement of these parameters was obsd. for the gel cong. 10% gelatin and 0.1% fDNA.

13

Synthesis and characterization of binary complexes of furcellaran with gelatin and bovine serum albumin

Jamróz E., Konieczna-Molenda A., Para A.

Polimery

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2018

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T. 63, nr 6

416--423

EN

Furcellaran (FUR) complexes with albumin (BSA) and gelatin (GEL) were investigated. The zeta potential (ζ) values of furcellaran, gelatin and their mixtures at weight ratios 2 : 1, 1 : 1, and 1 : 2 (w/w) were measured over a pH range 2.0–10.0. FUR/GEL and FUR/BSA complexes were prepared by the electrolysis of aqueous solutions of both components taken in the 1 : 1 (w/w) ratio. The results of the elemental analysis, FT-IR spectroscopy and thermal analysis confirmed the formation of the complexes. The investigated complexes differed in their susceptibility to enzymatic hydrolysis and solubility. At room temperature, the solubility of FUR/GEL and FUR/BSA complexes was 0.055 ± 0.021 g/100 cm3 H2O and 0.031 ± 0.020 g/100 cm3 H2O, respectively. Different structures of FUR/GEL and FUR/BSA complexes, determined by SEM studies, can explain differences in both solubility and hydrolytic susceptibility. Enzymatic studies showed that the furcellaran/gelatin and furcellaran/bovine serum albumin complexes are biodegradable. The complexes were not physical mixtures of the components.

PL

Badano kompleksy furcellaranu (FUR) z albuminą (BSA) oraz żelatyną (GEL). Wartości zeta potencjału (ζ) furcellaranu, żelatyny oraz ich mieszanin w stosunku masowym 2 : 1, 1 : 1, 1 : 2 określono w zakresie pH 2,0–10,0. Kompleksy FUR/GELoraz FUR/BSA otrzymano metodą elektrosyntezy przy stosunku masowym 1 : 1. Metodami analizy elementarnej (EA), spektroskopii w podczerwieni z transformacją Fouriera (FT-IR) oraz analizy termicznej (DSC, TGA) potwierdzono powstanie kompleksów FUR/GELi FUR/BSA. Otrzymane kompleksy różniły się podatnością na hydrolizę enzymatyczną i rozpuszczalnością. W temperaturze pokojowej rozpuszczalność kompleksów FUR/GELi FUR/BSA wynosiła, odpowiednio, 0,055 ± 0,021 g/100 cm3 H2O i 0,031 ± 0,020 g/100 cm3 H2O. Obserwowana na zdjęciach SEM odmienna struktura kompleksów może tłumaczyć różnice w ich rozpuszczalności oraz podatności na hydrolizę enzymatyczną. Analiza przebiegu hydrolizy wskazywała na biodegradowalność badanych kompleksów. Potwierdzono, że otrzymane kompleksy nie są fizycznymi mieszaninami składników.

14

Effect of organic additives on electrodeposition of tin from acid sulfate solution

Rudnik E., Chowaniec G.

Metallurgy and Foundry Engineering

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2018

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Vol. 44, no. 1

41--52

EN

Basic electrochemical experiments on the kinetics of tin deposition from an acid sulfate solution containing organic additives were performed. The measurements showed that tin deposits with activation polarization in a narrow potential range. Organic additives like gelatin and β-naphtol inhibit the charge transfer stage of the cathodic reaction due to the formation of adsorption layers. In turn, the gluconate ions increase the rate of tin deposition due to the bonding of hydrogen ions and inhibiting hydrogen coevolution. This results in serious changes in the morphology of tin deposits from isolated polyhedron crystals (no additive) via rectangular plates (β-naphtol) and thin plates (sodium gluconate) to rounded grains (gelatin).

PL

Przeprowadzono podstawowe badania elektrochemiczne osadzania cyny z kwaśnego roztworu siarczanowego zawierającego dodatki organiczne. Pomiary wykazały, że cyna wydziela się w zakresie polaryzacji aktywacyjnej w stosunkowo wąskim przedziale potencjałów. Dodatki organiczne jak żelatyna i β-naftol hamują proces przeniesienia ładunku przez granicę faz wskutek tworzenia warstw adsorpcyjnych. Z kolei jony glukonianowe zwiększają szybkość osadzania cyny przez wiązanie jonów wodorowych i hamowanie współwydzielania wodoru. Powoduje to poważne zmiany morfologii osadów katodowych: od wielościennych kryształów cyny (brak dodatków), przez tworzenie prostokątnych ziaren płytkowych (β-naftol) i cienkich płytek (glukonian sodu), do ziaren o zaokrąglonych kształtach (żelatyna).

15

Zmodyfikowane struktury żelatynowe – alternatywny materiał na opakowania żywności. Badanie właściwości termofizycznych i mechanicznych

Prazner Ł., Podsiadło H., Kozłowicz K.

Przemysł Spożywczy

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2017

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T. 71, nr 9

58--62

PL

W pracy podjęto próbę pozyskania zmodyfikowanych struktur żelatynowych, z przeznaczeniem na opakowania żywności. Żele, po uprzednim przygotowaniu, poddano liofilizacji, a następnie zbadano ich właściwości termofizyczne. Dodatkiem modyfikującym strukturę były chrupki skrobiowe otrzymane w procesie ekstruzji. Jako materiału porównawczego w badaniach przewodności i dyfuzyjności cieplnej oraz wytrzymałości na rozciąganie użyto styropianu ekstrudowanego XPS, stosowanego obecnie m.in. w produkcji opakowań dla przemysłu spożywczego.

EN

In the paper, the attempts to obtain modified gelatin structures for food packaging were described. After previous preparation, gels were subjected to lyophilisation process and then, their thermo-physical properties were tested. Starch crisps, as being obtained during extrusion process, were the structure-modifying addictive. The extruded XPS polystyrene, which is currently used in production of packages for food industry, was employed as a comparative material in thermal conductivity and diffusivity tests and in the tensile strength test.

16

Ternary potato starch-furcellaran-gelatin film – a new generation of biodegradable foils

Jamróz E., Konieczna-Molenda A., Para A.

Polimery

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2017

|

T. 62, nr 9

673--679

EN

Foils were prepared from potato starch (S), furcellaran (F) and gelatin (G) (S/F/G foils) using glycerol as a plasticizer. Their mechanical properties, aqueous solubility, water content, water uptake, enzymatic hydrolysis, and thermal (DSC) properties were determined. The 0.16 mm thick foil has ~ 80 MPa mechanical resistance with an elongation at break of 27.8 %. The aqueous solubility and water uptake of the S/F/G foils reached 35 % and 145 %, respectively. The S/F/G foils were susceptible to hydrolysis with polysaccharide enzymes such as glucoamylase and Viscozyme L (a blend of arabanase, cellulase, β-glucanase, hemicellulase and xylanase), as well as trypsin, a proteinase.

PL

Z mieszaniny skrobi ziemniaczanej (S), furcellaranu (F) i żelatyny (G) oraz glicerolu jako plastyfikatora otrzymywano trójskładnikową folię S/F/G. Zbadano właściwości mechaniczne, rozpuszczalność, zawartość wody, wodochłonność, podatność na hydrolizę enzymatyczną oraz właściwości termiczne (DSC) wytworzonej folii. Folia o grubości ok. 0,16 mm wykazywała wytrzymałość mechaniczną ~ 80 MPa, a jej wydłużenie przy zerwaniu wynosiło 27,8 %. Folia S/F/G charakteryzowała się małą rozpuszczalnością (ok. 35 %) i wodochłonnością (ok. 145 %). Zbadano kinetykę reakcji hydrolizy enzymatycznej folii S/F/G w obecności enzymów polisacharydowych: glukoamylazy i Viscozyme L (mieszanina enzymów arabinazy, celulazy, β-glukanazy, hemicelulazy, ksylanazy) oraz enzymu białkowego trypsyny.

17

Charakterystyka folii otrzymywanych z biopolimerów z dodatkiem olejków eterycznych

Jamróz E.

Polimery

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2017

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T. 62, nr 6

428--433

PL

Artykuł stanowi przegląd literatury dotyczącej wpływu olejków eterycznych na właściwości folii żelatynowych, chitozanowych oraz żelatynowo-chitozanowych. Folie biopolimerowe są tanie, biokompatybilne oraz funkcjonalne, a modyfikacja matrycy biopolimerowej olejkami eterycznymi o właściwościach przeciwbakteryjnych i przeciwutleniających umożliwia zastosowanie wytworzonych folii do produkcji materiałów opakowaniowych i zastąpienie nimi materiałów syntetycznych.

EN

This paper provides areview of the literature on the effect of essential oils on the properties of gelatin, chitosan, and gelatin-chitosan films. Biopolymer films are inexpensive, biocompatible and functional, while the modification of biopolymer matrix with antibacterial and antioxidant essential oils makes possible to use the produced films in food packaging instead of synthetic materials.

18

The influence of the nanohydroxyapatite and gelatin additives on selected properties of PDLG electrospun fibers

Gwiazda M., Kijeńska E., Zalewska-Wierzbicka K., Swieszkowski W.

Engineering of Biomaterials

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2017

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Vol. 20, no. 143 spec. iss.

39

19

Structure and Properties of Modified Flax Yarn with Collagen

Sui Z., Pang W., Wei Y., Song J.

Fibres & Textiles in Eastern Europe

|

2015

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Vol. 23, no. 1 (109)

30--34

EN

The structure and property changes of collagen modified flax yarn were investigated in order to improve the usability of flax yarn. First flax yarn was treated with sodium hydroxide solution and next with chloroacetic acid to get carboxymethyl flax yarn. Then the carboxymethyl flax yarn was grafted with gelatin protein solution to obtain modified flax yarn. Reactive blue dye was used for the dyeing test of the modified flax yarn. Its structure was characterized and analysed by FT-IR, X-ray diffraction and SEM. Meanwhile breaking strength and elongation at break of the modified flax yarn and the exhaustion rate and fixation rate of reactive blue dye was tested, respectively. The results show that the carboxymethyl flax yarn and gelatin protein are combined with a chemical bond. The different mass concentration of the gelatin solution has some influence on the grafting rate of flax yarn grafted with collagen. After modification of the flax yarn, the breaking strength shows a little loss, the elongation at break increases to a certain degree, and the exhaustion and fixation rate of the reactive dye increase significantly.

PL

Badano strukturę i zmiany właściwości przędz lnianych modyfikowanych kolagenem w celu polepszenia właściwości użytkowych. W pierwszej fazie przędze traktowano roztworem wodorotlenku sodu, a następnie kwasem chlorooctowym w celu otrzymania karboksymetylocelulozy. Otrzymaną przędzę szczepiono roztworem protein. Przędzę barwiono reaktywnym barwnikiem niebieskim. Właściwości strukturalne przędzy zbadano stosując spektroskopię FTIR, dyfrakcję rentgenowską i SEM. Stwierdzono, że zmodyfikowane przędze posiadają nieznacznie mniejszą wytrzymałość na rozciąganie, natomiast większe wydłużenie przy zerwaniu. Stwierdzono również, że zdolności barwienia wzrosły znacznie po modyfikacji.

20

Biorozkładalne filmy polimerowe napełnione zmodyfikowanym kolagenem

Stasiak A., Prochoń M., Ntumba Y.-H. T.

Eliksir

|

2015

|

nr 1

39--42

EN

The aim of this study was to produce green polymer films. The concept was based on using adduct of enzymatically hydrolyzed collagen protein as a filler in carboxylated butadiene - styrene latex (XSBR) matrixes. Additionally, the materials were examined due to the addition of poly(vinyl alcohol) and gelatin. Biocomposites were tested in terms of the additives influence on mechanical and degradation properties.