Oyunchimeg Zandraa

Tomas Bata University in Zlín

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Petr Sáha

Tomas Bata University in Zlín

Nabanita Saha

Tomas Bata University in Zlín

Fahanwi Asabuwa Ngwabebhoh

Tomas Bata University in Zlín

Tomáš Sáha

Tomas Bata University in Zlín

Rahul Patwa

Tomas Bata University in Zlín

Hau Trung Nguyen

Tomas Bata University in Zlín

ĢŠ

Ģirts Šalms

Riga Stradiņš University

Takeshi Kitano

Kumamoto University

Mainak Chaudhry

Nibedita Saha

Tomas Bata University in Zlín

Cooperative Institutions

Tomas Bata University in Zlín

East China University of Science and Technology

Indian Institute of Technology Guwahati

Czech Academy of Sciences, Institute of Macromolecular Chemistry

Brno University of Technology

University of Chemistry and Technology, Prague

Czech Academy of Sciences

Charles University

Riga Technical University

International Union of Pure and Applied Chemistry

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Boosting photocatalytic degradation of estrone hormone by silica-supported g-C3N4/WO3 using response surface methodology coupled with Box-Behnken design

Journal of Photochemistry and Photobiology A Chemistry (2023)

Hassan Ali Muhammad Yasir Fahanwi Asabuwa Ngwabebhoh Tomáš Šopík Oyunchimeg Zandraa

Box–Behnken design

Photodegradation

10.1016/j.jphotochem.2023.114733

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Citations (12)

Effect of Iron-Oxide Nanoparticles Impregnated Bacterial Cellulose on Overall Properties of Alginate/Casein Hydrogels: Potential Injectable Biomaterial for Wound Healing Applications

Polymers (2020)

Rahul Patwa Oyunchimeg Zandraa Zdenka Capáková Nabanita Saha Petr Sáha

In this study we report the preparation of novel multicomponent hydrogels as potential biomaterials for injectable hydrogels comprised of alginate, casein and bacterial cellulose impregnated with iron nanoparticles (BCF). These hydrogels demonstrated amide cross-linking of alginate–casein, ionic cross-linking of alginate and supramolecular interaction due to incorporation of BCF. Incorporation of BCF into the hydrogels based on natural biopolymers was done to reinforce the hydrogels and impart magnetic properties critical for targeted drug delivery. This study aimed to improve overall properties of alginate/casein hydrogels by varying the BCF loading. The physico-chemical properties of gels were characterized via FTIR, XRD, DSC, TGA, VSM and mechanical compression. In addition, swelling, drug release, antibacterial activity and cytotoxicity studies were also conducted on these hydrogels. The results indicated that incorporation of BCF in alginate/casein hydrogels led to mechanically stronger gels with magnetic properties, increased porosity and hence increased swelling. A porous structure, which is essential for migration of cells and biomolecule transportation, was confirmed from microscopic analysis. The porous internal structure promoted cell viability, which was confirmed through MTT assay of fibroblasts. Moreover, a hydrogel can be useful for the delivery of essential drugs or biomolecules in a sustained manner for longer durations. These hydrogels are porous, cell viable and possess mechanical properties that match closely to the native tissue. Collectively, these hybrid alginate–casein hydrogels laden with BCF can be fabricated by a facile approach for potential wound healing applications.

Biomaterial

Biomolecule

Viability assay

10.3390/polym12112690

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Citations (64)

Peptoids and polypeptoids: biomimetic and bioinspired materials for biomedical applications

Polymer Bulletin (2017)

Ganesh Shimoga Nabanita Saha Oyunchimeg Zandraa Ronald N. Zuckermann Petr Sáha

Peptoid

Biomimetic Materials

10.1007/s00289-016-1902-1

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Citations (32)

Corrigendum to “Ecofriendly Synthesis of Silver Nanoparticles from Garden Rhubarb (Rheum rhabarbarum)”

Journal of Nanotechnology (2017)

Prabashni Reddy Ganesh Shimoga Nabanita Saha Oyunchimeg Zandraa Petr Sáha

Rheum (plant)

Silver nanoparticle

10.1155/2017/7673261

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In-situ coating of leather with conducting polyaniline in colloidal dispersion mode

Synthetic Metals (2022)

Fahanwi Asabuwa Ngwabebhoh Oyunchimeg Zandraa Tomáš Sáha Jaroslav Stejskal Miroslava Trchová

Polyaniline nanofibers

10.1016/j.synthmet.2022.117191

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Citations (11)

Effect of salt concentration and temperature on the rheological properties of guar gum-dead sea salt gel

AIP conference proceedings (2016)

Oyunchimeg Zandraa Nabanita Saha Tomáš Sáha Takeshi Kitano Petr Sáha

Dead Sea Salt (DSS) contains 21 minerials including magnesium, calcium, sulfur, bromide, iodine, sodium, zinc and potassium etc. On the other hand, Guar Gum (GG) is a natural polysaccharide, water soluble, having highest molecular weight and good gelling property. Due to such advantageous properties of DSS and GG, it has been taken interest to prepare a user friendly medicated gel (designated as GG-DSS gel) adding additional ingredients:e.g. Glycerol, Thymol, Ethanol, Seabuckthorn oil, and essencial oils for the improvment of the gel's medicated values and healing properties for the curing of general skin diseases/treatment. In this study, the viscoelastic behavior of GG-DSS gels were characterized by dynamic storage (G') and loss (G") moduli and complex viscosity as a function of angular frequency. The effect of DSS concentration and temperature on these properties of GG-DSS gels was investigated. All GG-DSS gels having different amount DSS shows G' higher than G" over a wide range of angular frequency. Both moduli have the trends to increase with the increase of temperature (temperature varies from 28°C to 50°C), and increase with the increase of DSS concentration higher than about 10%. In conclusion, it can be mentioned that the knowledge about the rheological properties of DSS-GG gels may be useful during the characterization of similar kinds of medicated gel.

Guar gum

Dead sea

Salt solution

10.1063/1.4965544

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Citations (2)

Ecofriendly Synthesis of Silver Nanoparticles from Garden Rhubarb (Rheum rhabarbarum)

Journal of Nanotechnology (2016)

Ramasubba Reddy Palem Ganesh Shimoga Nabanita Saha Oyunchimeg Zandraa Petr Sáha

Bioreduction of silver ions following one pot process is described to achieve Rheum rhabarbarum (RR) based silver nanoparticles (SNPs) which is termed as “RR-SNPs.” The Ultraviolet–visible spectroscopy (UV–vis) confirms the characteristic surface plasmon resonance band for RR-SNPs in the range of 420–460 nm. The crystalline nature of SNPs was confirmed by X-ray diffraction (XRD) peaks at 38.2°, 45.6°, 64.2°, and 76.8°. Transmission electron microscopy (TEM) and scanning electronic microscopy (SEM) confirm the shape of synthesized SNPs. They are roughly spherical but uniformly distributed, and size varies from 60 to 80 nm. These biogenic SNPs show persistent zeta potential value of 34.8 mV even after 120 days and exhibit potent antibacterial activity in presence of Escherichia coli (CCM 4517) and Staphylococcus aureus (CCM 4516). In addition, cytotoxicity of RR-SNPs against in vitro human epithelial carcinoma (HeLa) cell line showed a dose-response activity. The lethal concentration (LC50) value was found to be 28.5 μ g/mL for RR-SNPs in the presence of HeLa cells. These findings help us to evaluate their appropriate applications in the field of nanotechnology and nanomedicine.

HeLa

Zeta potential

Silver nanoparticle

Ultraviolet visible spectroscopy

10.1155/2016/4964752

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Citations (19)

In situ preparation of bacterial cellulose reinforced hydrogel electrolyte for flexible supercapacitors

Haojie Fei Nabanita Saha Oyunchimeg Zandraa Robert Moučka Natalia E. Kazantseva

Internal Grant Agency of Tomas Bata University in Zlin [IGA/CPS/2016/003]; Open Project of Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology; Ministry of Education, Youth, and Sports of the Czech Republic [LH 14273]

Christian ministry

Bacterial Cellulose

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Development of novel biocomposites based on the clean production of microbial cellulose from dairy waste (sour whey)

Journal of Applied Polymer Science (2021)

Hau Trung Nguyen Fahanwi Asabuwa Ngwabebhoh Nabanita Saha Oyunchimeg Zandraa Tomáš Sáha

Abstract This work explores the production of kombucha‐derived bacterial cellulose (KBC) from sour whey via the fermentation method using Komagatacibacter xylinus . The biosynthesis process was optimized by design of experiments and the results displayed highest KBC yield at 1000 ml/L sour whey waste, 87.39 g/L cane sugar, 6 g/L black tea, and 78.91 ml/L bacteria volume under 21 days culture period at 30°C. Optimum fermentation batch efficiency was achieved in large scale with cultured medium depths of 0.5 cm and low‐residual bacteria suspension volume of 72.31 ± 8.74 ml. The obtained KBC membranes were analyzed by SEM, FTIR, XRD, and TGA. The obtained results show no significant differences for all prepared KBC samples when compared to pristine bacterial cellulose from standard Hestrin and Schramm (HS) medium. In addition, the optimized KBC was investigated as a suitable bio‐filler in the preparation of biocomposite materials. The prepared biocomposites as leather alternative were further characterized and their mechanical tensile strength and elongation at break determined in the range of 135.61 ± 9.15 to 154.89 ± 9.09 N/mm 2 and 31.06 ± 0.32 to 92.33 ± 6.91%, respectively. This model obtained depicts high‐yield production of KBC and its potential in the preparation of biocomposites.

Bacterial Cellulose

Bioplastic

Coffee grounds

Biocomposite

10.1002/app.51433

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Citations (12)

Silane-modified kombucha-derived cellulose/polyurethane/polylactic acid biocomposites for prospective application as leather alternative

Sustainable materials and technologies (2023)

Hau Trung Nguyen Nabanita Saha Fahanwi Asabuwa Ngwabebhoh Oyunchimeg Zandraa Tomáš Sáha

Polylactic Acid

Thermal Stability

10.1016/j.susmat.2023.e00611

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Citations (8)