Alginate affects agglomeration state and uptake of 14C-labeled few-layer graphene by freshwater snails: Implications for the environmental fate of graphene in aquatic systems

Su, Yu; Huang, Chi‐Cheng; Lu, Fenxiao; Tong, Xin; Niu, Junfeng; Mao, Liang

doi:10.1016/j.envpol.2017.11.087

Cited by 12 publications

(4 citation statements)

References 58 publications

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Section: Methodsmentioning

confidence: 99%

“…In order to investigate the changes of the Cpf-MSNs@PDA composite after entering the gut of M. separata, M. separata was exposed for 10 h; the midgut tissue was taken out and profixed with 2.5% glutaraldehyde at 4 °C for 24 h, then postfixed with 1% osmium tetroxide for 1 h, and dehydrated in gradient concentration of ethanol (50%, 70%, 80%, 95%, and 100%). 41 The sample was embedded with propylene oxide and an epoxy mixture. The LEICA EM UC7 ultrathin microtome was used to cut the embedded midgut tissue sample into 70−90 nm thick slices; then, the tissue sections were stained with uranyl acetate and lead citrate and finally observed by a biological TEM.…”

Section: Methodsmentioning

confidence: 99%

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An Alkali-Triggered Polydopamine Modified Mesoporous Silica Nanopesticide for Smart Delivery of Chlorpyrifos with Low Loss

Kan

Lü

Deng

et al. 2022

ACS Agric. Sci. Technol.

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The development of nanotechnology provides a feasible and effective way to reduce pesticide loss and improve pesticide utilization. In this study, we created chlorpyrifos-loaded mesoporous silica nanocomposites modified with polydopamine (Cpf-MSNs@PDA) for the smart control of pests. The release of Cpf from the nanocomposite was alkali triggered and temperature dependent, guaranteeing the sustained and steady effectiveness of the active constituent with prolonged persistence time. The modification with PDA endowed the nanocomposite with better foliar adhesion and rain erosion resistance. Compared with Cpf, the leaf slip angle of Cpf-MSNs@PDA was increased from 27° to 60°, and the rain erosion loss was reduced by 2.6 times. The insecticidal persistence of the Cpf-MSNs@PDA nanopesticide was measured and found to be better than that of commercial Cpf with bi-insecticidal pathways. In pathway 1, a small portion of Cpf (16.7%) was released from Cpf-MSNs@PDA in vitro to perform contact toxicity on Mythimna separata, which shows an advantage of sustained release. In pathway 2, after being ingested, the alkaline midgut microenvironment of M. separata triggered the degradation of Cpf-MSNs@PDA, inducing the release of all the Cpf to exert acute gastric toxicity. These results highlight the potential of a nanopesticide in the delivery of an active pesticide ingredient with low loss and high efficiency. The design of a smart nanocomposite for the control of a specific type of pest or disease provides ideas for the development of sustainable agriculture.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

An Alkali-Triggered Polydopamine Modified Mesoporous Silica Nanopesticide for Smart Delivery of Chlorpyrifos with Low Loss

Kan

Lü

Deng

et al. 2022

ACS Agric. Sci. Technol.

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“…By detecting radiolabeled CO 2 , Dong et al found that the graphene in soil was degraded by a heterogeneous Fenton reaction into the gas phase with H 2 O 2 and ferric oxide that occurred naturally in red soil . With the support of radioactive tracing, Su and co-workers studied the settling behavior of graphene in different water system with extremely low concentration (158 μg/L), and green algae was found to cospittle with graphene and consequently alter the graphene phase distribution. , Lu et al revealed that 14 C-labeled graphene can cross the intestinal wall and enter intestinal epithelial cells and the bloodstream in zebrafish, benefiting from the advantage of 14 C labeling, and the internal exposure dose of zebrafish intestinal epithelial cells was accurately quantified . In another study, Lu et al exposed two sizes of 14 C-labeled graphene (smaller lateral dimensions (SLG, 20–40 nm) and larger lateral dimensions (LLG, 330–630 nm)) into mice by intravenous injection and indicated that 14 C-labeled graphene mainly accumulated in the liver: approximately 60.91 and 74.13% of the total liver uptake for SLG and LLG in liver .…”

Section: Radiological Labelingmentioning

confidence: 99%

Approaches to Nanoparticle Labeling: A Review of Fluorescent, Radiological, and Metallic Techniques

Chen

et al. 2023

Environ. Health

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Nanomaterials are widely used in commercial products, resulting in the release of nanoscale particles into the environment. This raises concerns about their potential exposure risks in complex biological matrices. Most attempts use engineered nanomaterials (ENMs) to mimic the biological behavior of nanoparticles in the environment, and labeling of ENMs by sensors is a commonly used approach for sensitive detection and tracking of ENMs in organisms. However, due to the distinct physicochemical properties of nanoparticles, different labeling approaches have been developed, each with varying applicability. In this Review, we summarize the three main types of labeling methods used for nanoparticles: fluorescent, radiological, and metallic labeling. We discuss their labeling mechanisms, efficiency, stability, target nanoparticles, and applicability in different organism models. Finally, we propose a labeling scheme for specific nanoparticles. Overall, this Review provides a comprehensive overview of the advances in nanoparticle labeling techniques and their potential applications in environmental and health studies.

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“…Su et al (2018) evaluated graphene-alginate associations. After having the surface of few-layer graphene modified with alginate, the systemic and intestinal levels of few-layer graphene were significantly raised, whereas intestinal epithelial cell internalization was dramatically decreased [ 165 ]. In vitro studies indicated that a pectic polysaccharide was obtained from water decoction of Xinjiang L. brabarum using anion exchange chromatography and gel filtration.…”

Section: Health Benefits Of Pegsmentioning

confidence: 99%

Polysaccharide-Based Edible Gels as Functional Ingredients: Characterization, Applicability, and Human Health Benefits

Pascuta

Varvara

Teleky

et al. 2022

Gels

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Nowadays, edible materials such as polysaccharides have gained attention due to their valuable attributes, especially gelling property. Polysaccharide-based edible gels (PEGs) can be classified as (i) hydrogels, (ii) oleogels and bigels, (iii) and aerogels, cryogels and xerogels, respectively. PEGs have different characteristics and benefits depending on the functional groups of polysaccharide chains (e.g., carboxylic, sulphonic, amino, methoxyl) and on the preparation method. However, PEGs are found in the incipient phase of research and most studies are related to their preparation, characterization, sustainable raw materials, and applicability. Furthermore, all these aspects are treated separately for each class of PEG, without offering an overview of those already obtained PEGs. The novelty of this manuscript is to offer an overview of the classification, definition, formulation, and characterization of PEGs. Furthermore, the applicability of PEGs in the food sector (e.g., food packaging, improving food profile agent, delivery systems) and in the medical/pharmaceutical sector is also critically discussed. Ultimately, the correlation between PEG consumption and polysaccharides properties for human health (e.g., intestinal microecology, “bridge effect” in obesity, gut microbiota) are critically discussed for the first time. Bigels may be valuable for use as ink for 3D food printing in personalized diets for human health treatment. PEGs have a significant role in developing smart materials as both ingredients and coatings and methods, and techniques for exploring PEGs are essential. PEGs as carriers of bioactive compounds have a demonstrated effect on obesity. All the physical, chemical, and biological interactions among PEGs and other organic and inorganic structures should be investigated.

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Alginate affects agglomeration state and uptake of 14C-labeled few-layer graphene by freshwater snails: Implications for the environmental fate of graphene in aquatic systems

Cited by 12 publications

References 58 publications

An Alkali-Triggered Polydopamine Modified Mesoporous Silica Nanopesticide for Smart Delivery of Chlorpyrifos with Low Loss

An Alkali-Triggered Polydopamine Modified Mesoporous Silica Nanopesticide for Smart Delivery of Chlorpyrifos with Low Loss

Approaches to Nanoparticle Labeling: A Review of Fluorescent, Radiological, and Metallic Techniques

Polysaccharide-Based Edible Gels as Functional Ingredients: Characterization, Applicability, and Human Health Benefits

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