Toxicity Evaluation of Individual and Mixtures of Nanoparticles Based on Algal Chlorophyll Content and Cell Count

Ko, Kyung‐Seok; Koh, Dong‐Chan; Kong, In Chul

doi:10.3390/ma11010121

Cited by 32 publications

(13 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zn serves as cofactor for various enzymatic reactions, as well as DNA transcription (Miazek et al 2015). Despite this fact, toxic effects of ZnO NPs were also largely studied and showed greatest inhibition of growth and chlorophyll content in algae when compared to other NPs (Ko et al 2018). Our observations of the red fluorescence decrease are in agreement with lowering of the chlorophyll content and clustering of cells can also be a result of the NP toxicity.…”

supporting

confidence: 74%

Preparation of metal nanoparticles by femtosecond laser ablation

Teplický¹,

Chorvát²,

Michalka³

et al. 2018

Nova Biotechnologica Et Chimica

View full text Add to dashboard Cite

Nanoparticles (NPs) proved to have numerous applications in various fields, including biomedicine and environmental sciences. In this work, we designed and created an apparatus for fabrication of metal NPs directly in liquids initiated by femtosecond laser pulses. The laser parameters leading to ~10 μJ/pulse energy and 0.1 GW peak power resulted in predominantly spherical particles with the sizes varying from <10 nm to ~100 nm in diameter. NPs generated from Cobalt and Zinc targets were smaller in order of magnitude compared to that of Nickel. The fabricated NPs were characterized by scanning electron microscopy, while spectroscopic properties were investigated by absorption spectroscopy and spectrally resolved fluorescence imaging. We also tested the possible interaction of the created NPs with living algae for their potential use for environmental research. Employing such ultrashort laser opens route to provide on-demand production of NP's in-situ at even factory environment.

show abstract

supporting

confidence: 74%

Preparation of metal nanoparticles by femtosecond laser ablation

Teplický¹,

Chorvát²,

Michalka³

et al. 2018

Nova Biotechnologica Et Chimica

View full text Add to dashboard Cite

show abstract

“…Chlorophyll A is the most common type of chlorophyll found in photo organisms (photosynthetic organisms). [16][17][18] 3 | RESULTS AND DISCUSSION P(DMAEMA-co-MMA) copolymers of various compositions were synthesized by free-radical polymerization and AIBN initiator used in the presence of DMF solvent at 70 C. The chemical reaction for the synthesis of copolymer has been presented in Table 1 and Figure 1.…”

Section: Chlorophyll a Measurementmentioning

confidence: 99%

Amphiphilic copolymers of dimethyl aminoethyl methacrylate and methyl methacrylate with controlled hydrophilicity for antialgal activity

Mushtaq

Abbas

Nasir

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Biofouling due to algae mass attachment has detrimental effects on the performance and economy of many manufacturing processes. In consideration of this, present research is focused to mitigate such effect through the development of environmentally benign active antialgal cationic amphiphilic copolymers of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) and methyl methacrylate (MMA). The copolymers compositions were synthesized to tailor various characteristics to control surface biofilm formation and antialgal activities were determined through suspension assay. Biofilm formation of Dictyosphaerium sp. algae on the synthesized copolymers of different surface energies was ascertained by measuring chlorophyll A content and percent adhesion of algae. The copolymers antialgal performance enhanced with increase in PDMAEMA concentration as it exhibited the lowest contact angle as well as adhesion and minimum chlorophyll A contents. Algal adhesion on the surface of materials was also observed by optical microscopy. The copolymers with higher concentration of DMAEMA resulted in greater hydrophilicity which exhibited low adhesion of Dictyosphaerium algae due to possibility of stronger hydration effect and wettability as evident from their lower water contact angle. The developed benign cationic polymers of PDMAEMA and PMMA with varying compositions can lead to important breakthrough in the subject area of antialgal research in several manufacturing processes.

show abstract

“…Previous studies have observed different modes of toxicity among different test organisms. Both additive (50%) and synergistic (47%) effects on seed germination have been observed, whereas mainly synergistic (67%) and additive (67%) effects have been observed in bacterial bioluminescence tests and algal growth tests, respectively [ 55 , 56 ]. Azevedo et al [ 57 ] suggested that the toxicity of a binary mixture of ZnO and Ag NPs could be predicted based on not only the toxicity of their components but also the interaction between the exact NPs and concentrations used.…”

Section: Discussionmentioning

confidence: 99%

Comparisons of the Effect of Different Metal Oxide Nanoparticles on the Root and Shoot Growth under Shaking and Non-Shaking Incubation, Different Plants, and Binary Mixture Conditions

Kong

Koh

2021

Nanomaterials

Self Cite

View full text Add to dashboard Cite

We evaluated the toxicity of five metal oxide nanoparticles (NPs) in single or binary mixtures based on root and shoot growth of two plant species under non-shaking and shaking conditions. The effects of NPs on root and shoot growth differed depending on the NP type, incubation condition, and plant type. The half maximal effective concentration (EC50) of NPs based on root growth were significantly lower, by 2.6–9.8 times, under shaking than non-shaking conditions (p = 0.0138). The magnitude of the effects of NPs followed the order CuO > ZnO > NiO >> Al2O3, TiO2. In addition, Lactuca sativa L. was more sensitive to the tested NPs than Raphanus sativus L., with an EC50 0.2–0.7 times lower (p = 0.0267). The observed effects of 12 combinations of binary NP mixtures were slightly, albeit non-significantly, lower than expected, indicative of an additive effect of the individual NPs in the mixtures. The results emphasize the importance of careful plant model selection, appropriate application of incubation conditions, and consideration of chemical mixtures rather than single compounds when evaluating the effects of metal oxide NPs.

show abstract

Toxicity Evaluation of Individual and Mixtures of Nanoparticles Based on Algal Chlorophyll Content and Cell Count

Cited by 32 publications

References 46 publications

Preparation of metal nanoparticles by femtosecond laser ablation

Preparation of metal nanoparticles by femtosecond laser ablation

Amphiphilic copolymers of dimethyl aminoethyl methacrylate and methyl methacrylate with controlled hydrophilicity for antialgal activity

Comparisons of the Effect of Different Metal Oxide Nanoparticles on the Root and Shoot Growth under Shaking and Non-Shaking Incubation, Different Plants, and Binary Mixture Conditions

Contact Info

Product

Resources

About