Kraft lignin/silica–AgNPs as a functional material with antibacterial activity

Kłapiszewski, Łukasz; Rzemieniecki, Tomasz; Krawczyk, Magdalena; Malina, Dagmara; Norman, Małgorzata; Zdarta, Jakub; Majchrzak, Izabela; Dobrowolska, Anna; Czaczyk, Katarzyna; Jesionowski, Teofil

doi:10.1016/j.colsurfb.2015.06.056

Cited by 94 publications

(57 citation statements)

References 59 publications

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“…3,47-49 Gram-negative bacteria are more sensitive against Ag@SiO 2 than gram-positive bacteria, also demonstrated by Klapiszewski and co-workers 50 The comparison of the antimicrobial efficacy of silica nanorattles with different silver loadings ( Figure 5) shows a clear supremacy of the nanorattles with higher silver loading. Indeed the bacterial growth was inhibited when the concentration of Ag@SiO 2 increased to 2 mg mL −1 .…”

Section: Discussionmentioning

confidence: 61%

Antimicrobial silver-filled silica nanorattles with low immunotoxicity in dendritic cells

Priebe

Widmer

Löwa

et al. 2017

Nanomedicine: Nanotechnology, Biology and Medicine

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The progression in the use of orthopedic implants has led to an increase in the absolute number of implant infections, triggering a search for more effective antibacterial coatings. Nanorattles have recently gained interest in biomedical applications such as drug delivery, as encapsulation of the cargo inside the hollow structure provides a physical protection from the surrounding environment. Here, silvercontaining silica nanorattles (Ag@SiO 2 ) were evaluated for their antimicrobial potential and for their impact on cells of the immune system. We show that Ag@SiO 2 nanorattles exhibited a clear antibacterial effect against Escherichia coli as well as Staphylococcus aureus found in post-operative infections. Immunotoxicological analyses showed that the particles were taken up through an active phagocytic process by dendritic cells of the immune system and did not affect their viability nor induce unwanted immunological effects. Silver-containing silica nanorattles thus fulfill several prerequisites for an antibacterial coating on surgical implants.

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Section: Discussionmentioning

confidence: 61%

Antimicrobial silver-filled silica nanorattles with low immunotoxicity in dendritic cells

Priebe

Widmer

Löwa

et al. 2017

Nanomedicine: Nanotechnology, Biology and Medicine

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“…At present, scientists in many centers all over the world are conducting numerous studies on the physicochemical and structural properties of lignin [44][45][46] results of a wide range of analyses in another article on the use of lignin and lignin combined with PVP as a cell carrier [25].…”

Section: Carrier Characteristicsmentioning

confidence: 99%

The Use of Lignin as a Microbial Carrier in the Co-Digestion of Cheese and Wafer Waste

et al. 2019

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The aim of the article was to present the effects of lignin grafted with polyvinylpyrrolidone (PVP) as a microbial carrier in anaerobic co-digestion (AcoD) of cheese (CE) and wafer waste (WF). Individual samples of waste cheese and wafers were also tested. The PVP modifier was used to improve the adhesive properties of the carrier surface. Lignin is a natural biopolymer which exhibits all the properties of a good carrier, including nontoxicity, biocompatibility, porosity, and thermal stability. Moreover, the analysis of the zeta potential of lignin and lignin combined with PVP showed their high electrokinetic stability within a wide pH range, that is, 4-11. The AcoD process was conducted under mesophilic conditions in a laboratory by means of anaerobic batch reactors. Monitoring with two standard parameters: pH and the VFA/TA ratio (volatile fatty acids-to-total alkalinity ratio) proved that the process was stable in all the samples tested. The high share of N-NH 4 + in TKN (total Kjeldahl nitrogen), which exceeded 90% for WF+CE and CE at the last phases of the process, proved the effective conversion of nitrogen forms. The microbiological analyses showed that eubacteria proliferated intensively and the dehydrogenase activity increased in the samples containing the carrier, especially in the system with two co-substrates (WF+CE/lignin) and in the waste cheese sample (CE/lignin). The biogas production increased from 1102.00 m 3 Mg −1 VS (volatile solids) to 1257.38 m 3 Mg −1 VS in the WF+CE/lignin sample, and from 881.26 m 3 Mg −1 VS to 989.65 m 3 Mg −1 VS in the CE/lignin sample. The research results showed that the cell immobilization on lignin had very positive effect on the anaerobic digestion process.

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“…due to their complexation with polysaccharides (Cowan 1999). Lignin is also a known antibacterial agent and tends to inhibit the growth of a wide spectrum of microorganisms and, therefore, may lead to synergistic increase in the antimicrobial activity as one of the components of CML-T composites (Jesionowski et al 2015).…”

Section: Antimicrobial Activitiesmentioning

confidence: 99%

Synthesis and characterization of crystalline carboxymethylated lignin–TEOS nanocomposites for metal adsorption and antibacterial activity

Kumari

Jha

2016

Bioresour. Bioprocess.

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Biodegradable carboxymethylated lignin-tetra ethoxysilane (TEOS) nanocomposites (CML-T) were synthesized using lignin extracted from rice straw (RS) followed by surface modification through carboxymethylation. Composites were characterized by UV-spectroscopy, Fourier transform infrared (FT-IR), scanning electron microscope (SEM), X-ray diffraction pattern (XRD), atomic absorption spectroscopy (AAS) and particle size distribution (PSD). The average diameter (D 50 ) of the CML-T composite particles was observed in the range of 160-560 nm. XRD spectra and SEM micrographs confirmed the high degree of crystallinity (peaks located at lower angle, 2θ = 12 and 22.0°) and porous nature of nanocomposites with increasing concentrations of TEOS. The composite exhibited nickel (Ni 2+ ) and cadmium (Cd 2+ ) adsorption up to 70.72 and 81.79 %, respectively in AAS analysis. The CML-T composite was investigated to assess their future applications as wound dressings and antimicrobial and packaging agents. Based on the antimicrobial properties and potential to remediate toxic heavy metals, the composites are proposed to be used for wastewater treatments, as packaging materials and for preparation of biofilters for environmental protection.

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Kraft lignin/silica–AgNPs as a functional material with antibacterial activity

Cited by 94 publications

References 59 publications

Antimicrobial silver-filled silica nanorattles with low immunotoxicity in dendritic cells

Antimicrobial silver-filled silica nanorattles with low immunotoxicity in dendritic cells

The Use of Lignin as a Microbial Carrier in the Co-Digestion of Cheese and Wafer Waste

Synthesis and characterization of crystalline carboxymethylated lignin–TEOS nanocomposites for metal adsorption and antibacterial activity

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