Environmental exposure of a simulated pond ecosystem to a CuO nanoparticle-based wood stain throughout its life cycle

Many studies on anti-bacterial/antiviral surfaces have been conducted to prevent epidemic spread worldwide. Several nanoparticles such as those composed of silver and copper are known to have antiviral properties. In this study, we developed copper oxide (CuO) nanoparticle-incorporated nanofibers to inactivate or remove viruses. The CuO nanoparticle-incorporated nanofiber was fabricated with a hydrophobic polymer—polyvinylpyrrolidone (PVP)—using electrospinning, and CuO nanoparticles were exposed from the PVP polymer surface by etching the nanofiber with oxygen plasma. The fabrication conditions of electrospinning and oxygen plasma etching were investigated by scanning electron microscopy (SEM), and field emission transmission electron microscopy (FETEM)/ energy dispersive spectrometry (EDS). H1N1 virus was utilized as the target sample and quantified by RT-qPCR. The antiviral efficacy of CuO nanoparticle-incorporated nanofibers was compared against bare CuO nanoparticles. Overall, 70% of the viruses were inactivated after CuO nanoparticle-incorporated nanofibers were incubated with 102 pfu/mL of H1N1 virus solution for 4 h. This indicates that the developed CuO nanoparticle-incorporated nanofibers have noticeable antiviral efficacy. As the developed CuO nanoparticle-incorporated nanofibers exerted promising antiviral effects against H1N1 virus, it is expected to benefit global health by preventing epidemic spread.

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In situ synthesis of CuO nanoparticles over functionalized mesoporous silica and their application in catalytic syntheses of symmetrical diselenides

Dalton Transactions ◽

10.1039/c9dt03418h ◽

2019 ◽

Vol 48 (48) ◽

pp. 17874-17886 ◽

Cited By ~ 2

Author(s):

Trisha Das ◽

Rana Chatterjee ◽

Adinath Majee ◽

Hiroshi Uyama ◽

David Morgan ◽

...

Keyword(s):

Mesoporous Silica ◽

In Situ Synthesis ◽

Cuo Nanoparticles ◽

Functionalized Mesoporous Silica ◽

Cuo Nanoparticle ◽

Nanoparticle Catalyst

A versatile and novel mesoporous silica supported CuO nanoparticle catalyst (nCuO-FMS) and its application in the syntheses of symmetrical diselenides.

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Effects of Injury by a Pyralid Insect Pest on Duckweed Growth and Productivity in Minipond Ecosystem

Journal of Bangladesh Academy of Sciences ◽

10.3329/jbas.v36i1.10920 ◽

2012 ◽

Vol 36 (1) ◽

pp. 53-59

Author(s):

N Parven ◽

MA Bashar ◽

MAK Chowdhury ◽

SB Quraishi

Keyword(s):

Life Cycle ◽

Insect Pest ◽

Pupal Stage ◽

Experimental Result ◽

Infestation Intensity ◽

Pond Ecosystem ◽

Characteristic Nature ◽

Feeding Adaptations ◽

Academy Of Sciences ◽

The Impact

The strategic points of a pyralid insect, Synclita occidentalis (Pylralidae, Lepidoptera) on duckweed productivity, life cycle and its association with duckweed (host-plant) in pond ecosystem was studied. A total of 16 samples were used to study the infestation intensity and the impact of pest on duckweed production. The insect was found deeply associated with duckweed to complete its life cycle. The pyralid insect attains its pest status at larval stage and continues up-to the pupal stage. Larval and pupal case-making and feeding adaptations were noted as the characteristic nature of injury. The larvae build case with duckweed fronds and roots and use duckweed fronds that failed to multiply further. The crop of larva was the largest and widest part of the alimentary canal and varied exceedingly along with larval category. The experimental result indicated that pest impact in two different experimental miniponds was different in quantities but similar in mode of action. DOI: http://dx.doi.org/10.3329/jbas.v36i1.10920 Journal of Bangladesh Academy of Sciences, Vol. 36, No. 1, 53-59, 2012

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A facile approach towards copper oxide nanoparticles synthesis using Spirulina platensis and assessment of its biological activities

Brazilian Journal of Biological Sciences ◽

10.21472/bjbs.051020 ◽

2018 ◽

Vol 5 (10) ◽

pp. 433-442 ◽

Cited By ~ 1

Author(s):

Priyanga Jayakrishnan ◽

Sirajunnisa Abdul Razack ◽

Keerthana Sivanesan ◽

Pavithra Sellaperumal ◽

Geethalakshmi Ramakrishnan ◽

...

Keyword(s):

Copper Oxide ◽

Spirulina Platensis ◽

Biological Activities ◽

Nanoparticle Synthesis ◽

Cuo Nanoparticles ◽

Metal Nanoparticle ◽

Anticancer Activities ◽

Cytotoxicity Activity ◽

Ft Ir ◽

Cuo Nanoparticle

There is a budding need to develop a method for environmentally benign metal nanoparticle synthesis, that do not use toxic chemicals in the synthesis protocols to avoid adverse effects in medical applications. The present investigation dealt with the synthesis of copper oxide (CuO) nanoparticles from blue green alga, Spirulina platensis. The algal extract consisting of phytochemicals was used as the reducing agent and copper sulphate as the substrate. Synthesised nanoparticles were characterized by UV-Vis spectrophotometry, FT-IR spectroscopy, XRD and SEM. Antibacterial and anticancer activities were assessed for the CuO nanoparticles. The results indicated that the formed CuO nanoparticles were observed to be nanosheets. FT-IR spectral analysis elucidated the occurrence of biomolecules required for the reduction of copper oxide ions. The synthesized nanoparticles were found to be effective at the concentration of 1 mg/mL against Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa and Serratia marcescens. The cytotoxicity activity of CuO nanoparticle was evaluated by MTT Assay against colon cancer cell lines and confirmed that CuO nanoparticle at a concentration of 125 µg/mL had cytotoxic activity. In conclusion, the CuO nanoparticles were synthesized at a low energy supply, in an ecologically safe mode which could be utilized for pharmacological applications and various biotechnological studies.

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Chronic dosing of a simulated pond ecosystem in indoor aquatic mesocosms: fate and transport of CeO2 nanoparticles

Environmental Science Nano ◽

10.1039/c5en00092k ◽

2015 ◽

Vol 2 (6) ◽

pp. 653-663 ◽

Cited By ~ 16

Author(s):

M. Tella ◽

M. Auffan ◽

L. Brousset ◽

E. Morel ◽

O. Proux ◽

...

Keyword(s):

Point Source ◽

Cerium Oxide ◽

Fate And Transport ◽

Ceo2 Nanoparticles ◽

Cerium Oxide Nanoparticles ◽

Oxide Nanoparticles ◽

Pond Ecosystem ◽

Aquatic Mesocosms ◽

Continuous Point ◽

Pond Ecosystems

Indoor aquatic mesocosms were designed to mimic pond ecosystems contaminated by a continuous point-source discharge of cerium oxide nanoparticles (CeO2-NPs).

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Ensuring biological sample integrity from collection to analysis for LC–MS workflows: case studies illustrating challenges in clinical trials

Bioanalysis ◽

10.4155/bio-2019-0176 ◽

2019 ◽

Vol 11 (20) ◽

pp. 1859-1866 ◽

Cited By ~ 1

Author(s):

Melanie Anderson

Keyword(s):

Clinical Trials ◽

Life Cycle ◽

Case Studies ◽

Environmental Exposure ◽

Biological Sample ◽

Reliable Data ◽

Central Laboratory ◽

Exposure Temperature ◽

Sample Stability ◽

Internal Operations

In quantitative bioanalysis, ensuring sample integrity through the life cycle of a sample is crucial for providing reliable data. Sponsors must develop proper collection procedures to ensure high sample quality. Collection procedures should mitigate sample variability and stability concerns. Sample stability concerns can be managed with appropriate stabilization approaches like the addition of preservative, environmental exposure (temperature, humidity, light controls) and timely analysis with more frequent shipping. It is important that the bioanalytical scientist communicates specific needs to internal operations groups, the central laboratory and clinical sites. In large global trials, this is logistically challenging given the large number of sites and the potential language barriers. Several case studies presented below will illustrate logistical challenges with unstable compounds and unique matrices for LC–MS/MS workflows.

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