Pengyan Liu

Surface Oxidation and Defect Formation Under Five Photoaging Regimes Enhance Cd2+ and Pb2+ Adsorption by Polyethylene and Polyvinyl Chloride Microplastics

Yichao Gong, Lu Liu, Yajing Guo, Pengyan Liu

Photoaging alters polymer surface chemistry and can thereby regulate the interfacial binding of metal ions by microplastics. In this study, polyethylene (PE) and polyvinyl chloride (PVC) microplastics were exposed for three weeks to five regimes comprising UV-air, UV-ultrapure water, UV-simulated seawater, UV/H2O2, …

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Atomically Precise Gold Nanoclusters in Electrochemiluminescence: Fundamentals, Modulation Strategies, and Applications

Jinyang Zhuang, Tingting Han, Enwei Zhu, Pengyan Liu et autres

Atomically Precise Gold Nanoclusters (AP-AuNCs) have emerged as cutting-edge nanomaterials in the electrochemiluminescence (ECL) realm due to their atomically precise structures, quantum confinement effect, and superior biocompatibility. This review systematically summarizes the recent advancements of AP-AuNCs in ECL. First, the fundamental ECL …

A novel alkaloid and eight compounds from Portulaca oleracea L. and their biological activities

Pengyan Liu, Xinyi Zhao, Xiujuan Lan, Xiyue Gao et autres

A study on Portulaca oleracea L. resulted in the identification of a previously undescribed amide derivative, oleracrylimide G (1), along with eight known metabolites. The full structural assignments were achieved using comprehensive spectroscopic data. Assays demonstrated that oleracrylimide G (1) exerts significant …

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A new alkaloid isolated from Portulaca oleracea L. and its anti-inflammatory mechanism

Pengyan Liu, Jing Liu, Yingdai Zhao, Xixiang Ying et autres

A alkaloid identified as 8-(2-hydroxyethyl)-3,8-diazabicyclo[4.2.0]octa-1,4,6-triene-2-carbaldehyde named Oleradiazahyde was isolated. Its skeleton was assigned by UV, IR, NMR, as well as UHPLC-ESI-Q-TOF/MS. Simultaneously, LPS-activated RAW 264.7 tests revealed that 15 μM compound suppressed NO/IL-6, and 5 μM restrained IL-1β secretion. At 15 μM, …

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Two new ester glycosides from Portulaca oleracea L. and their bioactivities

Xiyue Gao, Shengnan Guo, Pengyan Liu, Jing Liu et autres

Two new ester glycosides named oleracrylate A (1), and oleracrylate B (2) were isolated from Portulaca oleracea L. The structures of the two compounds were verified by 1D, 2D NMR and UHPLC-ESI-QTOF/MS methods. Furthermore, the anti-inflammatory activities of the two ester glycosides …

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Nanobiochar Mitigates Photosynthetic Impairment in Rice Caused by Antibiotic Cocontamination: A Mechanistic Elucidation of Dual-Site Photoinhibition and Metabolic Reprogramming

Haipeng Zhu, Quanlong Wang, Z W Wu, Fei Lian et autres

Antibiotic cocontamination poses a severe but poorly understood threat to crop photosynthesis. This study employed an integrated multiscale framework to uncover the phytotoxicity of tetracycline (TC) and ciprofloxacin (CIP) on rice seedlings and evaluate the mitigation potential of nanobiochar (nBC). Coexposure to …

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Two amide alkaloids from Portulaca oleracea L. and their bioactivities

Zhiwei Zhang, Xiujuan Lan, Mingbo Zhang, Pengyan Liu et autres

This investigation sought to investigate the alkaloid constituents of Portulaca oleracea L. and evaluate their anti-inflammatory potential. Phytochemical investigation of P. oleracea led to the discovery of two hitherto unreported alkaloids, Oleracrylimide I (1) and Oleracrylimide J (2). Their structures were elucidated …

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CramIS: a blockchain-based integrated system for cross-regional scheduling of agricultural machinery

Haotian Yang, Jun Dai, Pujie Jing, Pengyan Liu et autres

Secure and efficient cross-regional scheduling is essential for realizing agricultural machinery sharing. Although some scheduling systems have been proposed, two crucial issues need to be addressed: 1) Centralized management . Most existing systems rely on a third party for scheduling calculations and …

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Three New Natural Compounds from Portulaca oleracea and their Bioactivities

Pengyan Liu, Jiayin Tian, Yingdai Zhao, Jing Liu et autres

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Minimalist nanobody architecture: A double-edged sword for immunological analysis

Yulong Wang, Ruifeng Luo, Huijuan Yang, Pengyan Liu et autres

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Investigation and insights into the technical strategies for reducing agrochemical inputs in rice farming to enhance agroecosystem resilience and food safety, A case study in China

Y H Zhang, Haoran Zhang, Tingting Tao, Jian Chen et autres

The growing demand for cereal production has led to increasing agrochemical inputs; therefore, evaluation and adjustment of current practices are required to maintain and improve sustainable cropping systems. A Four-years study of multiple practices with reduced agrochemical application for rice farming was …

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Exploration of Short Distance Freight Volume Prediction and Vehicle Scheduling Strategy Optimization

Pengyan Liu, Xin Wang

In the logistics terminal operation scenario, accurate prediction of short distance transportation cargo volume is crucial for scientific vehicle scheduling, which is the key to improving logistics efficiency and reducing operating costs. This study utilizes data-driven predictive modeling and multi-objective programming scheduling …

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