Fourier transform infrared spectroscopy to assess molecular-level changes in microorganisms exposed to nanoparticles

Faghihzadeh, Fatemeh; Anaya, Nelson M.; Schifman, L. A.; Oyanedel-Craver, Vinka

doi:10.1007/s41204-016-0001-8

Cited by 176 publications

(97 citation statements)

References 119 publications

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“…These specific bands exhibit two orders of magnitude stronger absorbance (relative to the corresponding bands in the control experiments without background), emerging in the same characteristic absorption bands of Staphylococcus aureus bacterial membrane. However, the new emerging band at 1170 cm −1 can be related to δ (COP), C-C and COH-vibrations in deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) backbones [26], while the specific new band at 1740 cm −1 can be linked to >C=O vibrations in lipid esters [26] or to peroxide oxidation of nucleic acids during oxidative stress, driven by reactive oxygen compounds [27].…”

Section: Ir Characterization Of Staphylococcus Aureus Bacterial Biofimentioning

confidence: 99%

Surface-Enhanced IR-Absorption Microscopy of Staphylococcus aureus Bacteria on Bactericidal Nanostructured Si Surfaces

et al. 2019

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Surface-enhanced IR absorption (SEIRA) microscopy was used to reveal main chemical and physical interactions between Staphylococcus aureus bacteria and different laser-nanostructured bactericidal Si surfaces via simultaneous chemical enhancement of the corresponding IR-absorption in the intact functional chemical groups. A cleaner, less passivated surface of Si nanoripples, laser-patterned in water, exhibits much stronger enhancement of SEIRA signals compared to the bare Si wafer, the surface coating of oxidized Si nanoparticles and oxidized/carbonized Si (nano) ripples, laser-patterned in air and water. Additional very strong bands emerge in the SEIRA spectra on the clean Si nanoripples, indicating the potential chemical modifications in the bacterial membrane and nucleic acids during the bactericidal effect.

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Section: Ir Characterization Of Staphylococcus Aureus Bacterial Biofimentioning

confidence: 99%

Surface-Enhanced IR-Absorption Microscopy of Staphylococcus aureus Bacteria on Bactericidal Nanostructured Si Surfaces

et al. 2019

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“…The vibratory activation intensity of the molecules is between 10 13 and 10 14 Hz, which is infrared radiation. This allows IR spectroscopy to analyze and conduct quantitative and qualitative studies of self-assembled functional groups organized in the nanoparagon surfaces [ 113 ]. FTIR enables interfaces to be analyzed in situ to investigate the functional group surface adsorption on nanoparticles.…”

Section: Morphological and Physiochemical Characterizationmentioning

confidence: 99%

A Comprehensive Review on Corn Starch-Based Nanomaterials: Properties, Simulations, and Applications

et al. 2020

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Corn (Zea mays L.) is one of the major food crops, and it is considered to be a very distinctive plant, since it is able to produce a large amount of the natural polymer of starch through its capacity to utilize large amounts of sunlight. Corn starch is used in a wide range of products and applications. In recent years, the use of nanotechnology for applications in the food industry has become more apparent; it has been used for protecting against biological and chemical deterioration, increasing bioavailability, and enhancing physical properties, among other functions. However, the high cost of nanotechnology can make it difficult for its application on a commercial scale. As a biodegradable natural polymer, corn starch is a great alternative for the production of nanomaterials. Therefore, the search for alternative materials to be used in nanotechnology has been studied. This review has discussed in detail the properties, simulations, and wide range of applications of corn starch-based nanomaterials.

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“…Rapid, reliable and cost-effective analytical methods for detection of ENM-microbial interaction are also very important for understanding the mechanism of interaction and the safe use and monitoring of nanomaterials in the environment. Several sophisticated spectroscopic methods, such as Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), mass spectrometry, Raman spectroscopy are being used for studying the microbial interaction and changes in the intercellular composition of the microorganisms [23]. The methods, such as FTIR, are highly reliable to assess the microbial interactions with nanomaterials at molecular level.…”

Section: Mechanism Of Enm Toxicity To Microbial Communitiesmentioning

confidence: 99%

Current understandings of toxicity, risks and regulations of engineered nanoparticles with respect to environmental microorganisms

Hegde

Brar

Verma

et al. 2016

Nanotechnol. Environ. Eng.

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Engineered nanomaterials offer exciting application opportunities in diverse fields ranging from biomedical, agriculture, environmental, cosmetics to household commodities. Increasing use of nanomaterials in day-today applications has also increased their exposure to environment and ecosystems significantly, which has raised the concern for environmental safety due to their potential adverse and toxicological effects on microbial community. Although several risk and safety assessment studies to evaluate the fate of nanoparticle in the environment and their effect on living organisms are being carried out in the recent years, still the current knowledge on impact of these nanomaterials on microorganisms is limited. The present review comprehensively summarizes and interprets the impact of nanomaterials on microbial community. Further, the technical challenges associated with the nanotoxicity evaluation, data interpretation and environmental regulations with respect to engineered nanomaterials are discussed.

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Fourier transform infrared spectroscopy to assess molecular-level changes in microorganisms exposed to nanoparticles

Cited by 176 publications

References 119 publications

Surface-Enhanced IR-Absorption Microscopy of Staphylococcus aureus Bacteria on Bactericidal Nanostructured Si Surfaces

Surface-Enhanced IR-Absorption Microscopy of Staphylococcus aureus Bacteria on Bactericidal Nanostructured Si Surfaces

A Comprehensive Review on Corn Starch-Based Nanomaterials: Properties, Simulations, and Applications

Current understandings of toxicity, risks and regulations of engineered nanoparticles with respect to environmental microorganisms

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