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Article ; Online: Gecko-Inspired Controllable Adhesive: Structure, Fabrication, and Application.

Liu, Yanwei / Wang, Hao / Li, Jiangchao / Li, Pengyang / Li, Shujuan

Biomimetics (Basel, Switzerland)

2024 Volume 9, Issue 3

Abstract: The gecko can achieve flexible climbing on various vertical walls and even ceilings, which is closely related to its unique foot adhesion system. In the past two decades, the mechanism of the gecko adhesion system has been studied in-depth, and a verity ... ...

Abstract	The gecko can achieve flexible climbing on various vertical walls and even ceilings, which is closely related to its unique foot adhesion system. In the past two decades, the mechanism of the gecko adhesion system has been studied in-depth, and a verity of gecko-inspired adhesives have been proposed. In addition to its strong adhesion, its easy detachment is also the key to achieving efficient climbing locomotion for geckos. A similar controllable adhesion characteristic is also key to the research into artificial gecko-inspired adhesives. In this paper, the structures, fabrication methods, and applications of gecko-inspired controllable adhesives are summarized for future reference in adhesive development. Firstly, the controllable adhesion mechanism of geckos is introduced. Then, the control mechanism, adhesion performance, and preparation methods of gecko-inspired controllable adhesives are described. Subsequently, various successful applications of gecko-inspired controllable adhesives are presented. Finally, future challenges and opportunities to develop gecko-inspired controllable adhesive are presented.
Language	English
Publishing date	2024-03-01
Publishing country	Switzerland
Document type	Journal Article ; Review
ISSN	2313-7673
ISSN (online)	2313-7673
DOI	10.3390/biomimetics9030149
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Article ; Online: Perfluorobutanoic acid triggers metabolic and transcriptional reprogramming in wheat seedlings.

Wang, Guotian / Sun, Jing / Li, Lei / Li, Jiuyi / Li, Pengyang

The Science of the total environment

2024 Volume 927, Page(s) 172343

Abstract: The environmental risks of fluorinated alternatives are of great concern with the phasing out of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate. Here, multi-omics (i.e., metabolomics and transcriptomics) coupled with physiological and ... ...

Abstract	The environmental risks of fluorinated alternatives are of great concern with the phasing out of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate. Here, multi-omics (i.e., metabolomics and transcriptomics) coupled with physiological and biochemical analyses were employed to investigate the stress responses of wheat seedings (Triticum aestivum L.) to perfluorobutanoic acid (PFBA), one of the short-chain per- and polyfluoroalkyl substances (PFAS) and PFOA alternatives, at environmentally relevant concentrations (0.1-100 ng/g). After 28 days of soil exposure, PFBA boosted the generation of OH and O
MeSH term(s)	Triticum/drug effects ; Fluorocarbons/toxicity ; Seedlings/drug effects ; Soil Pollutants/toxicity ; Oxidative Stress
Chemical Substances	Fluorocarbons ; Soil Pollutants ; perfluorobutyric acid (375-22-4)
Language	English
Publishing date	2024-04-10
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2024.172343
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Article: Domain Switching-Based Nonlinear Coupling Response for Giant Magnetostrictive Materials.

Chen, Yunshuai / Li, Pengyang / Sun, Jian / Chen, Guoqing

Materials (Basel, Switzerland)

2023 Volume 16, Issue 14

Abstract: This paper proposes a multilevel three-dimensional constitutive model based on a microscopically phenomenological approach from the domain rotation mechanism, which is a fully coupled self-consistent homogenization scheme considering the interactions ... ...

Abstract	This paper proposes a multilevel three-dimensional constitutive model based on a microscopically phenomenological approach from the domain rotation mechanism, which is a fully coupled self-consistent homogenization scheme considering the interactions between elastic-inelastic strain and hysteresis. Considering the interactions among magnetic domains, grains, polycrystalline complexes, and macroscopic phenomenology, we predict the nonlinear magnetostrictive response of Terfenol-D under different types of external force loads and magnetic excitations in various thermal environments involving multi-fields of coupled magnetic, elastic, thermal, and mechanical phenomena. The average values of the mechanical bulk strains for different magnetization states are obtained at the grain scale utilizing Boltzmann functions and a self-consistent homogenization scheme. A Taylor series expansion of the Gibbs function concerning the field variables and an adapted Jiles-Atherton model are used to construct the hysteresis coupled constitutive relations at the macroscopic scale. The results associated with the experiments show that the established model can reasonably predict the magnetostrictive response under different external mixed stimuli. It can provide theoretical guidance for the precise control of nonlinear vibrations and the optimal design of the rotating giant magnetostrictive transducers at both microscopic and macroscopic multiple scales.
Language	English
Publishing date	2023-07-09
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma16144914
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Article ; Online: Perfluorooctanoic acid (PFOA) caused oxidative stress and metabolic disorders in lettuce (Lactuca sativa) root.

Li, Pengyang / Li, Jiuyi

The Science of the total environment

2021 Volume 770, Page(s) 144726

Abstract: Eliminating the critical knowledge gaps of perfluorooctanoic acid (PFOA) effects in planta is the imperative target to accomplish accurate and meaningful exposure-risk assessment in the environment. Here, we investigated the effect of environmentally ... ...

Abstract	Eliminating the critical knowledge gaps of perfluorooctanoic acid (PFOA) effects in planta is the imperative target to accomplish accurate and meaningful exposure-risk assessment in the environment. Here, we investigated the effect of environmentally relevant concentrations of PFOA on the oxidative stress and metabolic regulation in lettuce (Lactuca sativa) root. Under the exposure to 5 and 50 μg/L PFOA for 10 days, 137.5 and 1275.0 ng PFOA/g dry weight were accumulated to roots, respectively. H
MeSH term(s)	Caprylates/toxicity ; Fluorocarbons/toxicity ; Humans ; Hydrogen Peroxide ; Lactuca ; Metabolic Diseases ; Oxidative Stress
Chemical Substances	Caprylates ; Fluorocarbons ; perfluorooctanoic acid (947VD76D3L) ; Hydrogen Peroxide (BBX060AN9V)
Language	English
Publishing date	2021-01-23
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2020.144726
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Article: Perfluorooctanoic acid (PFOA) caused oxidative stress and metabolic disorders in lettuce (Lactuca sativa) root

Li, Pengyang / Li, Jiuyi

Science of the total environment. 2021 May 20, v. 770

2021

Abstract	Eliminating the critical knowledge gaps of perfluorooctanoic acid (PFOA) effects in planta is the imperative target to accomplish accurate and meaningful exposure-risk assessment in the environment. Here, we investigated the effect of environmentally relevant concentrations of PFOA on the oxidative stress and metabolic regulation in lettuce (Lactuca sativa) root. Under the exposure to 5 and 50 μg/L PFOA for 10 days, 137.5 and 1275.0 ng PFOA/g dry weight were accumulated to roots, respectively. H₂O₂, the dominant reactive oxygen species, was slightly over-generated by 4.7%–9.5%. No signs of oxidative damage, such as lipid peroxidation, cell membrane integrity and soluble protein content, were observed. To deal with PFOA stress, the activities of ascorbate peroxidase and peroxidase and the contents of glutathione were dose-dependently up-regulated. Partial least-squares discriminant analysis revealed metabolite profiles were significantly altered by PFOA, involving the primary metabolism (e.g., sucrose, glucose, fructose-6-phosphate, methionine, γ-aminobutyric acid), and the biosynthesis of (poly)phenol (e.g., shikimate, naringenin) and alkaloid (e.g., geranyl diphosphate, dopamine). Our findings showed that environmentally relevant concentrations of PFOA significantly perturbed metabolisms in plant roots albeit no remarkable cell damage was induced.
Keywords	Lactuca sativa ; alkaloids ; ascorbate peroxidase ; biosynthesis ; cell membranes ; discriminant analysis ; dopamine ; environment ; fructose 6-phosphate ; glucose ; glutathione ; least squares ; lettuce ; lipid peroxidation ; metabolites ; methionine ; naringenin ; oxidative stress ; perfluorooctanoic acid ; peroxidase ; protein content ; sucrose
Language	English
Dates of publication	2021-0520
Publishing place	Elsevier B.V.
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2020.144726
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Article ; Online: Occurrence and Ecological Risk of Alkylamine Triazines in Chinese Estuarine Sediments: An Emerging Class of Persistent, Mobile, and Toxic Substances.

Li, Pengyang / Su, Wenyuan / Zhong, Laijin / Wang, Haotian / Huang, Xiang / Ruan, Ting / Jiang, Guibin

Environmental science & technology

2024 Volume 58, Issue 15, Page(s) 6814–6824

Abstract: Identifying persistent, mobile, and toxic (PMT) substances from synthetic chemicals is critical for chemical management and ecological risk assessment. Inspired by the triazine analogues (e.g., atrazine and melamine) in the original European Union's list ...

Abstract	Identifying persistent, mobile, and toxic (PMT) substances from synthetic chemicals is critical for chemical management and ecological risk assessment. Inspired by the triazine analogues (e.g., atrazine and melamine) in the original European Union's list of PMT substances, the occurrence and compositions of alkylamine triazines (AATs) in the estuarine sediments of main rivers along the eastern coast of China were comprehensively explored by an integrated strategy of target, suspect, and nontarget screening analysis. A total of 44 AATs were identified, of which 23 were confirmed by comparison with authentic standards. Among the remaining tentatively identified analogues, 18 were emerging pollutants not previously reported in the environment. Tri- and di-AATs were the dominant analogues, and varied geographic distributions of AATs were apparent in the investigated regions. Toxic unit calculations indicated that there were acute and chronic risks to algae from AATs on a large geographical scale, with the antifouling biocide cybutryne as a key driver. The assessment of physicochemical properties further revealed that more than half of the AATs could be categorized as potential PMT and very persistent and very mobile substances at the screening level. These results highlight that AATs are a class of PMT substances posing high ecological impacts on the aquatic environment and therefore require more attention.
MeSH term(s)	Water Pollutants, Chemical/analysis ; Rivers/chemistry ; Triazines/analysis ; Atrazine/analysis ; China ; Environmental Monitoring
Chemical Substances	Water Pollutants, Chemical ; Triazines ; Atrazine (QJA9M5H4IM)
Language	English
Publishing date	2024-04-06
Publishing country	United States
Document type	Journal Article
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.4c00577
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Article: Exposure routes, bioaccumulation and toxic effects of per- and polyfluoroalkyl substances (PFASs) on plants: A critical review

Li, Jiuyi / Sun, Jing / Li, Pengyang

Environment international. 2022 Jan., v. 158

2022

Abstract: Per- and polyfluoroalkyl substances (PFASs) are artificial persistent organic pollutants ubiquitous in ecosystem, and their bioaccumulation and adverse outcomes in plants have attracted extensive concerns. Here, we review the toxic effects of PFASs ... ...

Abstract	Per- and polyfluoroalkyl substances (PFASs) are artificial persistent organic pollutants ubiquitous in ecosystem, and their bioaccumulation and adverse outcomes in plants have attracted extensive concerns. Here, we review the toxic effects of PFASs encountered by various plants from physiological, biochemical and molecular perspectives. The exposure routes and bioaccumulation of PFASs in plants from contaminated sites are also summarized. The bioaccumulation of PFASs in plants from contaminated sites varied between ng/g and μg/g levels. The 50% inhibition concentration of PFASs for plant growth is often several orders of magnitude higher than the environmentally relevant concentrations (ERCs). ERCs of PFASs rarely lead to obvious phenotypic/physiological damages in plants, but markedly perturb some biological activities at biochemical and molecular scales. PFAS exposure induces the over-generated reactive oxygen species and further damages plant cell structure and organelle functions. A number of biochemical activities in plant cells are perturbed, such as photosynthesis, gene expression, protein synthesis, carbon and nitrogen metabolisms. To restore the desire states of cells exposed to PFASs, plants initiate several detoxifying mechanisms, including enzymatic antioxidants, non-enzymatic antioxidants, metallothionein genes and metabolic reprogramming. Future challenges and opportunities in PFAS phytotoxicity studies are also proposed in the review.
Keywords	bioaccumulation ; carbon ; cell structures ; ecosystems ; environment ; gene expression ; metallothionein ; nitrogen ; phenotype ; photosynthesis ; phytotoxicity ; plant growth ; protein synthesis ; reactive oxygen species
Language	English
Dates of publication	2022-01
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	554791-x
ISSN	1873-6750 ; 0160-4120
ISSN (online)	1873-6750
ISSN	0160-4120
DOI	10.1016/j.envint.2021.106891
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Article ; Online: Hippo pathway inhibition promotes metabolic adaptability and antioxidant response in myoblasts.

Liu, Qi / Pan, Su / Li, Pengyang / Dixon, Richard A F

Scientific reports

2023 Volume 13, Issue 1, Page(s) 2232

Abstract: Metabolic plasticity in a hostile environment ensures cell survival. We investigated whether Hippo pathway inhibition contributed to cell adaptations under challenging conditions. We examined metabolic profiles and fuel substrate choices and preferences ... ...

Abstract	Metabolic plasticity in a hostile environment ensures cell survival. We investigated whether Hippo pathway inhibition contributed to cell adaptations under challenging conditions. We examined metabolic profiles and fuel substrate choices and preferences in C2C12 myoblasts after Hippo pathway inhibition via Salvador knockdown (SAV1 KD). SAV1 KD induced higher ATP production and a more energetic phenotype. Bioenergetic profiling showed enhanced key mitochondrial parameters including spare respiratory capacity. SAV1 KD cells showed markedly elevated glycolysis and glycolytic reserves; blocking other fuel-oxidation pathways enhanced mitochondrial flexibility of glucose oxidation. Under limited glucose, endogenous fatty acid oxidation increased to cope with bioenergetic stress. Gene expression patterns after SAV1 KD suggested transcriptional upregulation of key metabolic network regulators to promote energy production and free radical scavenging that may prevent impaired lipid and glucose metabolism. In SAV1 KD cells, sirtuin signaling was the top enriched canonical pathway linked with enhanced mitochondrial ATP production. Collectively, we demonstrated that Hippo pathway inhibition in SAV1 KD cells induces multiple metabolic properties, including enhancing mitochondrial spare respiratory capacity or glycolytic reserve to cope with stress and upregulating metabolic pathways supporting elevated ATP demand, bioenergetics, and glycolysis and counteracting oxidative stress. In response to metabolic challenges, SAV1 KD cells can increase fatty acid oxidation or glucose-coupled oxidative phosphorylation capacity to compensate for substrate limitations or alternative fuel oxidation pathway inhibition.
MeSH term(s)	Adenosine Triphosphate/metabolism ; Antioxidants/metabolism ; Fatty Acids/metabolism ; Glucose/metabolism ; Glycolysis ; Hippo Signaling Pathway ; Animals ; Mice ; Myoblasts/metabolism ; Cell Line
Chemical Substances	Adenosine Triphosphate (8L70Q75FXE) ; Antioxidants ; Fatty Acids ; Glucose (IY9XDZ35W2)
Language	English
Publishing date	2023-02-08
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-29372-8
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Article ; Online: A Spiny Climbing Robot with Dual-Rail Mechanism.

Liu, Yanwei / Wang, Hao / Hu, Chongyang / Zhou, Qiang / Li, Pengyang

Biomimetics (Basel, Switzerland)

2023 Volume 8, Issue 1

Abstract: Easy detachment is as important as reliable an attachment to climbing robots in achieving stable climbing on vertical surfaces. To deal with the difficulty of detachment occurring in wheeled and track-type climbing robots using bio-inspired spines, a ... ...

Abstract	Easy detachment is as important as reliable an attachment to climbing robots in achieving stable climbing on vertical surfaces. To deal with the difficulty of detachment occurring in wheeled and track-type climbing robots using bio-inspired spines, a novel climbing robot utilizing spiny track and dual-rail mechanism is proposed in this paper. The spiny track consists of dozens of spiny feet, and the movement of each spiny foot is guided by the specially designed dual-rail mechanism to achieve reliable attachment and easy detachment. First, the design of the climbing robot and the dual-rail mechanism are presented. Then, the dual-rail model is constructed to analyze the attaching and detaching movements of the spiny feet, and a mechanical model is established to analyze the force distribution on the spiny track. Finally, a robot prototype is developed, and the analysis results are verified by the experiment results. Experiments on the prototype demonstrated that it could climb on various rough vertical surfaces at a speed of 36 mm/s, including sandpaper, brick surfaces, concrete walls with pebbles, and coarse stucco walls.
Language	English
Publishing date	2023-01-01
Publishing country	Switzerland
Document type	Journal Article
ISSN	2313-7673
ISSN (online)	2313-7673
DOI	10.3390/biomimetics8010014
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Article ; Online: Identification and Prioritization of Environmental Organic Pollutants: From an Analytical and Toxicological Perspective.

Ruan, Ting / Li, Pengyang / Wang, Haotian / Li, Tingyu / Jiang, Guibin

Chemical reviews

2023 Volume 123, Issue 17, Page(s) 10584–10640

Abstract: Exposure to environmental organic pollutants has triggered significant ecological impacts and adverse health outcomes, which have been received substantial and increasing attention. The contribution of unidentified chemical components is considered as ... ...

Abstract	Exposure to environmental organic pollutants has triggered significant ecological impacts and adverse health outcomes, which have been received substantial and increasing attention. The contribution of unidentified chemical components is considered as the most significant knowledge gap in understanding the combined effects of pollutant mixtures. To address this issue, remarkable analytical breakthroughs have recently been made. In this review, the basic principles on recognition of environmental organic pollutants are overviewed. Complementary analytical methodologies (i.e., quantitative structure-activity relationship prediction, mass spectrometric nontarget screening, and effect-directed analysis) and experimental platforms are briefly described. The stages of technique development and/or essential parts of the analytical workflow for each of the methodologies are then reviewed. Finally, plausible technique paths and applications of the future nontarget screening methods, interdisciplinary techniques for achieving toxicant identification, and burgeoning strategies on risk assessment of chemical cocktails are discussed.
MeSH term(s)	Environmental Pollutants/toxicity ; Environmental Monitoring/methods ; Risk Assessment
Chemical Substances	Environmental Pollutants
Language	English
Publishing date	2023-08-02
Publishing country	United States
Document type	Journal Article ; Review ; Research Support, Non-U.S. Gov't
ZDB-ID	207949-5
ISSN	1520-6890 ; 0009-2665
ISSN (online)	1520-6890
ISSN	0009-2665
DOI	10.1021/acs.chemrev.3c00056
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