PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
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2025
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IF 4
Yan Wang,Zhengxuan Wang,Yaping Liu,Charles Brennan,Jueting Liu,Jinhong Zhou,Wenbing Zhou,Guiguang Cheng
Natural polysaccharides have been attracted increasing attention in biopesticides for the antiviral effects. Tobacco leaves enriched the polysaccharides and had the potential against tobacco mosaic virus (TMV), however, the chemical structure and anti-TMV effect of polysaccharides from discarded tobacco leaves (DTCP) are still unclear. In this study, an optimized condition for extraction time of 3.5 h, temperature of 90 °C, and solid-liquid ratio of 1:45 led to the maximum extraction value of 21.11 % for DTCP. Subsequently, a homogeneous polysaccharide (DTP) of 3061 Da was purified from DTCP by DEAE and Sephadex G-100 column. The major monosaccharide composition of DTP was glucose (Glc), glucuronic acid (GlcA), galactose (Gal), and galacturonic acid (GalA) in a molar ratio of 3.9:2.6:1.06:0.84. NMR, methylation and IR analysis showed that DTP was a polysaccharide with →4)- β -D-Galp-(1 → 4)- β -D-Galp-(1 → 4)- β -D-Glcp as the main chain, and its branching points were composed of α -D-Glcp-(1→, α -D-GlcpA-(1→ and α -D-GalpA-(1→. Furthermore, DTP exhibited significant inactive and protective effects against TMV with the inhibitory rates of 80.40 % and 76.18 % at 500 μg/mL, respectively. DTP also interfered with the polymerization of TMV-CP to limit its self-assembly. Additionally, DTP could increase the superoxide dismutase, catalase, peroxidase and phenylalanine ammonia lyase activities of tobacco plants by 1.83, 2.73, 3.69 and 4.84 times, respectively, and could alleviate the hypersensitive response and systemic acquired resistance. Hence, DTP could serve as a new plant-derived pesticide for controlling TMV in agriculture.
研究领域:
植物学
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病毒学
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农业科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2016
·Vol. 128
·期 2
·653-660
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IF 1.781
Zhou Li,Liang Zongsheng,Li Rong,Huang Dan,Ren Xuehong
A novel environmentally friendly flame-retardant compound, diethyl 3-(triethoxysilanepropyl) phosphoramidate (DTP) was synthesized via a simple one-step procedure with good yield and characterized by FT-IR and 1 H-NMR, 31 P-NMR and 29 Si-NMR. The synthesized compound was coated onto cotton fabrics with different levels of add-ons (5–17 mass%) using the traditional pad-dry-cure method. SEM and XPS were conducted to characterize the surfaces of the coated cotton fabrics. The XPS results showed that DTP was attached to cotton through covalent bond. Cone calorimeter test showed that the cotton fabric treated with DTP became less flammable due to the lower HRR, THR and CO 2 /CO ratio. The modified cotton fabrics exhibited efficient flame retardancy, which was evidenced by limiting oxygen index (LOI) and vertical flammability test. Cotton fabrics treated with DTP in 5–17 mass% add-ons had high LOI values of 23–32%. Thermogravimetric analysis results show that the usage of DTP promotes degradation of the cotton fabrics and catalyzes its char formation.
研究领域:
材料科学
·
纺织工程
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DOI
高影响因子
SYNTHETIC METALS
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2025
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IF 4.6
Maolin He,Zijie Wang,Yong Chen,Yuheng Li,Junjie Wu,Peng Gao
Perovskite solar cells (PSCs) have achieved remarkable power conversion efficiencies (PCEs) exceeding 27 %, yet their long-term operational stability remains a significant barrier to commercialization. The state-of-the-art hole transport layer (HTL) based on Spiro-OMeTAD relies on hygroscopic lithium salts and volatile co-additives to boost conductivity, which inevitably accelerates interfacial degradation. Here, we introduce a molecular co-doping strategy in which a brominated dithieno[3,2-b:2′,3′-d]pyrrole derivative (DTP-OMe-2Br) is incorporated into Spiro-OMeTAD to synergistically combine their advantages. Owing to its planar donor-rich framework and bromine functionalities, DTP-OMe-2Br preferentially localizes at the perovskite/HTL interface, enhancing hole mobility, passivating undercoordinated Pb²⁺ defects, and increasing hydrophobicity without disrupting Spiro’s film-forming properties. As a result, devices achieve a champion PCE of 24.41 %, surpassing the 23.06 % of the pristine Spiro-OMeTAD reference, and retain over 85 % of their initial efficiency after 2500 h in ambient air. This work demonstrates that rationally designed small-molecule additives can serve as multifunctional interfacial modifiers for hybrid HTLs, offering a generalizable route toward high-efficiency and durable PSCs.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Wanlai Zhu,Guorui Zhou,Zao Yi,Hui You,Dongying Wang
Fiber optic sensors exhibit unique advantages in environmental monitoring and biomedicine, yet conventional designs face limitations in detection limits and sensitivity. To overcome these challenges, a tapered seven core fiber (SCF) sensing system based on dispersion turning point (DTP) modulation and surface modification enhancement is innovatively proposed in this work. The wavelength sensitivity near the DTP approaches infinity, and the DTP can also serve as an intrinsic self-referencing point during sensing. In humidity (1–92 %RH) sensing, the bare fiber achieved a wavelength sensitivity of 0.2025 nm/%RH and an intensity sensitivity of 0.086 dB/%RH near the DTP. In volatile organic compounds (VOCs) detection, silica sol-gel surface modification amplified the response to polar molecules by 2–4 times, enabling ppb-level pollutant sensing. Specifically, the maximum wavelength sensitivity for ethyl acetate exceeded 1094.2 pm/ppm. This study provides a novel integrated solution for the detection of low-concentration VOCs, offering broad application prospects.
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DOI
高影响因子
INORGANIC CHEMISTRY
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2025
·
IF 4.7
Chenbo Xu,Yuexiao Pan,Jianing Zhang,Yangyang Liu,Xiaoyun Yang,Suqin Chen,Jun Zou
The development of high-performance luminescent materials is essential for advancing optoelectronic applications, particularly in the field of solid-state lighting and displays. This study investigates the structural, optical, and thermal properties of the 0D organic–inorganic hybrid metal halides (OIHMHs) (2,6-DTP)2ZnCl4·DMF and its Sb3+-doped derivatives, aiming to enhance the luminescent efficiency and stability for potential applications in white light-emitting diodes (WLEDs). The Sb3+-doped (2,6-DTP)2ZnCl4·DMF samples showed broad emission spectra covering the entire visible region, with distinct peaks at 505 and 647 nm with the photoluminescence quantum yield (PLQY) of 91.9% and high thermal stability. Furthermore, the (2,6-DTP)2ZnCl4·DMF-based WLEDs exhibited stable white light emission with a high color rendering index (CRI) of 91 and a correlated color temperature (CCT) of 5635 K. This research provides valuable insights into the design and optimization of efficient luminescent materials for optoelectronic applications, contributing to the development of next-generation lighting technologies.
研究领域:
材料科学
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光学
·
电子工程
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产品关联
DOI
PubMed
高影响因子
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