PLANTA
·
2016
·Vol. 243
·期 4
·1023-1039
·
IF 3.239
Mo Hui-Juan,Sun Yan-Xiang,Zhu Xiao-Li,Wang Xing-Fen,Zhang Yan,Yang Jun,Yan Gui-Jun,Ma Zhi-Ying
Main conclusion
Cotton S-adenosylmethionine decarboxylase-, rather than spermine synthase-, mediated spermine biosynthesis is required for salicylic acid- and leucine-correlated signaling in the defense response to
Verticillium dahliae . Spermine (Spm) signaling is correlated with plant resistance to the fungal pathogen Verticillium dahliae . We identified genes for key rate-limiting enzymes in the biosynthesis of Spm, namely S - adenosylmethionine decarboxylase ( GhSAMDC ) and Spm synthase ( GhSPMS ). These were found by screening suppression subtractive hybridization and cDNA libraries of cotton ( Gossypium ) species tolerant to Verticillium wilt. Both were induced early and strongly by inoculation with V. dahliae and application of plant hormones. Silencing of GhSPMS or GhSAMDC in cotton leaves led to a significant accumulation of upstream substrates and, ultimately, enhanced plant susceptibility to Verticillium infection. Exogenous supplementation of Spm to the silenced cotton plants improved resistance. When compared with the wild type (WT), constitutive expression of GhSAMDC in Arabidopsis thaliana was associated with greater Verticillium wilt resistance and higher accumulations of Spm, salicylic acid, and leucine during the infection period. By contrast, transgenic Arabidopsis plants that over-expressed GhSPMS were unexpectedly more susceptible than the WT to V. dahliae and they also had impaired levels of putrescine (Put) and salicylic acid (SA). The susceptibility exhibited in GhSPMS -overexpressing Arabidopsis plants was partially reversed by the exogenous supply of Put or SA. In addition, the responsiveness of those two transgenic Arabidopsis lines to V. dahliae was associated with an alteration in transcripts of genes involved in plant resistance to epidermal penetrations and amino acid signaling. Together, these results suggest that GhSAMDC-, rather than GhSPMS-, mediated spermine biosynthesis contributes to plant resistance against V. dahliae through SA- and leucine-correlated signaling.
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 39
·22463-22474
·
IF 10.733
Qian Lu,Xiaohong Zou,Ran Ran,Wei Zhou,Kaiming Liao,Zongping Shao
Lithium–sulfur (Li–S) batteries are of great interest due to their high theoretical energy density and potentially low cost. However, two of the key issues hindering their commercialization are the polysulfide shuttling and Li-dendrite growth, which result in severe capacity decay and serious safety hazards. Herein, liquid-phase delaminated birnessite (HxMnO2+x) nanosheets along with graphene and carbon nanotubes are utilized for the first time to create an “electronegative” coating layer for Li–S batteries to suppress the polysulfide shuttling and Li-dendrite growth. The as-prepared coating layer enables stable cycling of the Li–S battery with a low capacity decay rate of 0.04% per cycle over 1000 cycles at 1C. In addition, a Li-symmetrical cell with the coating layer shows suppressed dendrite growth even after being cycled over 1000 hours at 1 mA cm−2. This excellent performance is ascribed, in part, to the synergistic effect of the chemical and electrostatic interactions among polysulfides, Li ions, and [MnO2+x]x− ions, resulting in a homogeneous Li-ion flux distribution and a mitigated polysulfide shuttling. The proposed concept of an “electronegative” bifunctional coating layer illustrates a simple and effective way to develop highly stable and safe Li–S batteries.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 11
·45984
·
IF 1.86
Ying Yue,Zhihui Fan,Chang Zheng,Lan Ding,Huiying Wang,Miao Zhang,Kuilin Deng
In this investigation, a group of poly( l -malic acid acetate- co - l -lysine ester)s (PMALs) with excellent thermo-sensitivity and non-cytotoxicity were prepared by an optimized synthetic route from natural l -malic acid and l -lysine. The structure and properties of PMALs including monomers were systematically characterized by FTIR, 1 H NMR, UV, gel permeation chromatograph, scanning electron microscope, contact angle measurement, cell counting kit assess (CCK-8), and confocal laser scanning microscopy (CLSM). Three PMALs show a reversible lower critical solution temperature of 8–36 °C depending on their chemical structure. The contact angle measurement revealed a considerable discrepancy in the hydrophilicity/hydrophobicity of PMALs and further influence on their thermo-sensitivity. The viability of HeLa cells exposed to 0.2–100 μg/mL PMALs solution was found to be in a range 80–103% after 24, 48, and 72 h of incubation, indicating no cytotoxicity. Moreover, a spherical nanocarrier with core-shell structure was facilely fabricated via the thermo-sensitivity of PMALs and hydrophobicity of drug. CLSM observations manifested that the hydrophobic-curcumin-enwrapped nanocarriers can clearly internalize into the cellular inside. The sustained release of curcumin from nanocarriers in vitro provided a possibility of depressing fast hydrolytic degradation at physiological pH or other side-effects. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45984.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Jiaxin Li,Chongchao Yao,Bo Song,Zhihao Zhang,Andreas Libonati Brock,Stefan Trapp,Jing Zhang
Microbial fuel cells (MFCs) have great promise for power generation by oxidizing organic wastewater, yet the challenge to realize high efficiency in simultaneous energy production and resource recovery remains. In this study, we designed a novel MFC anode by synthesizing S-doped NiFe 2 O 4 nanosheet arrays on carbon cloth (S10-NiFe 2 O 4 @CC) to build a three-dimensional (3D) hierarchically porous structure, with the aim to regulate the microbial community of sulfur-cycling microbes in order to enhance power production and elemental sulfur (S 0 ) recovery. The S10-NiFe 2 O 4 @CC anode obtained a faster start-up time of 2 d and the highest power density of 4.5 W/m 2 in acetate-fed and mixed bacteria-based MFCs. More importantly, sulfide removal efficiency (98.3 %) (initial concentration of 50 mg/L S 2− ) could be achieved within 3 d and sulfur (S 8 ) could be produced. Microbial community analysis revealed that the S10-NiFe 2 O 4 @CC anode markedly enriched sulfur-oxidizing bacteria (SOB) and promoted enrichment of SOB and sulfate-reducing bacteria (SRB) in the bulk solution as well, leading to the enhancement of power generation and S 0 recovery. This study shows how carefully designing and optimizing the composition and structure of the anode can lead to the enrichment of a multifunctional microbiota with excellent potential for sulfide removal and resource recovery.
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高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yu Lin,Fangfang Li,Xiaoqing Li,Hongwei Zhao,Gang Liu
To recycle wastes and develop renewable energy, much effort has been focused on converting biowastes into porous carbon for supercapacitors. Porous nanocage-like carbons have excellent capacitive properties, but generally their preparation methods are costly or complex. Herein, a “one-step” strategy of synchronous activation and support through the thermal decomposition of a multifunctional template (magnesium acetate, Mg(Ac)2) is designed to prepare N-, O-, and S-codoped mesoporous hollow biochar nanocages (BNC-700). The BNC-700 prepared displays an interconnected porous structure and a two-dimensional (2D) multilayer wall/three-dimensional (3D) hollow nanocage structure with abundant active heteroatoms and edge defects. Due to their specific structures, high surface areas (1369 m2 g–1), and large pore volumes (1.81 cm3 g–1), the assembled supercapacitor delivers a considerable energy density of 37.4 Wh kg–1 at 212 W kg–1 and cycling stability of 99.5% after 15,000 cycles. The unique structure and N, O, and S codoping characteristics ensure a potential application for BNC-700 in supercapacitors. In summary, a strategy is designed for the green, simple, and cost-effective preparation of high-performance biochar for advanced energy storage devices.
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高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Dongxia Chen,Jingjin Zhao,Liangliang Zhang,Rongjun Liu,Yong Huang,Chuanqing Lan,Shulin Zhao
Calcium ion (Ca2+) plays crucial roles in the signal transduction pathways associated with various physiological and pathological events. Monitoring intracellular Ca2+ is of great significance for cell biology research. Here, we report the use of biomass quantum dots (BQDs) as a fluorescent reporter for imaging of intracellular Ca2+, based on the inner-filter-mediated luminescence which was assisted by a Ca2+ chelator alizarin red S (ARS). BQDs were prepared by hydrothermal heating of capsicum. The absorption of ARS overlaps with the excitation of the BQDs, the fluorescence of BQDs being quenched through the inner-filter effect. But the absorption of Ca-ARS complex red shifts and shows a poor inner-filter effect. Thus, Ca2+ can be detected by the inner-filter-mediated luminescence using the BQDs-ARS nanohybrid system. Using the proposed nanosystem, the imaging of intracellular Ca2+ and real-time monitoring of the Ca2+ level change under histamine stimulation were also achieved. Thus, this nanosystem holds potential applications in other Ca2+-related signal transduction study.
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高影响因子
Journal of Materials Chemistry C
·
2012
·Vol. 1
·期 6
·1111-1121
·
IF 0
Junjie Li,Xin Hu,Guoxin Gao,Shujiang Ding,Huayi Li,Lanjun Yang,Zhicheng Zhang
For potential application in high energy storage capacitors with high energy density and low energy loss, three sets of poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene) [P(VDF-TrFE-CTFE)] grafted with poly(methacrylic ester)s, including poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA) and poly(butyl methacrylate) (PBMA) copolymers, are designed and investigated carefully. Due to their intermediate polarity, relatively high glass transition temperature, and excellent compatibility with PVDF chains, the poly(methacrylic ester) segments introduced could not only dramatically weaken the coupling interactions of oriented polar crystals, but could also accelerate the reversal switching of polar crystal domains along the applied electric field, which leads to well hindered remnant polarization. As a result, the displacement–electric field (D–E) hysteresis behaviors of the graft copolymers could be tuned from typical ferroelectric to either antiferroelectric or linear shape under high electric field. Meanwhile, significantly reduced energy loss and effectively improved energy discharging efficiency were obtained. Compared with PMMA and PBMA, PEMA with intermediate polarity and grafting length exhibits more suitable confinement of the F–P transition of P(VDF-TrFE-CTFE), and thus more desirable energy storage properties are observed in the resultant copolymers. These findings may help to deeply understand the ferroelectric nature of PVDF based fluoropolymers and design new energy storage capacitor materials with high discharged energy density and low energy loss.
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INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Qiang Zhang,Ranxiao Ao,Ruijie Gao,Huaming Yang
Transition metals with 3d unoccupied orbitals have superior catalytic activity, but inherent high spin suppresses their adsorption capability, leading to sluggish polysulfide conversion kinetics for Li–S batteries. Herein, we provide Fe–O–Si bridge bonds to manipulate eg filling and induce a high-to-medium spin transition of Fe3+ sites, which enhances polysulfide adsorption and facilitates sulfur redox reaction kinetics. The resultant cathodes exhibit outstanding performances under high sulfur loading, which can deliver a high battery specific energy of 1061 mA h·g–1 even after 100 cycles in Li–S pouch batteries. This work provides new insights into the kinetic and multi-step conversion mechanism of the sulfur redox reaction process, helping in the understanding and design of spin-dependent catalysts.
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高影响因子
Catalysts
·
2021
·Vol. 11
·期 9
·1130
·
IF 4.146
Zhuangzhuang Zhang,Yuanyuan Zhang,Xuanxuan Han,Li Guo,Danjun Wang,Kangle Lv
The novel 2D/2D S-scheme heterostructure of BiOCl nanosheets coupled with CaIn2S4nanosheets (CaIn2S4/BiOCl-SOVs), which contains surface oxygen vacancies (SOVs), has been successfully prepared by high-temperature calcination combined with a solvothermal synthetic strategy. Under visible-light irradiation, the apparent rate constant (Kapp/mim−1) for phenol degradation on the 1 wt% CaIn2S4/BiOCl-SOVs photocatalyst is about 32.8 times higher than that of pure BiOCl. The superior performance was attributed to the synergistic effect between the SOVs, CaIn2S4, and BiOCl, which can effectively narrow the bandgap and accelerate the interfacial charge separation of CaIn2S4/BiOCl-SOVs heterojunctions. Subsequently, it significantly promotes the generation of superoxide radicals (O2−), hydroxyl radicals, and h+, which participate in the photodegradation process of phenol. The catalyst still maintained a relatively high activity after repeated tests as a demonstration of its photostability. This work successfully proposed an efficient method to design a new 2D/2D S-scheme heterostructure with SOVs as possible photocatalysts in the field of environmental remediation.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Yingxia Ma,Miaoshi Li,Tianze Li,Haijun Yang,Ruilin Zhang,Xiaofei Ye,Wenli Meng,Xiaojun Chai,Cuixia Li
Industrial wastewater containing heavy metal Ag(I) causes irreversible harm to human health through food chain, necessitating effective removal methods. According to hard-soft acids-bases (HSAB) theory, nitrogen (N) and sulfur (S) functional groups form stable chelates with Ag(I). In this study, 2-amino-5-sulfanyl-1,3,4-thiadiazole (AST) with three N and two S groups served as organic ligand, and zinc nitrate hexahydrate provided metal center, novel amorphous metal-organic framework (Zn-AST) rich in N and S groups was synthesized via a one-pot solvothermal method. Batch experiments assessed the Zn-AST adsorption properties for Ag(I) in aqueous solutions. In addition, density-functional theory, frontier orbital theory, and molecular electrostatic surface potential analyses were used to elucidate the synthesis and adsorption mechanisms. The maximum adsorption capacity of Zn-AST for Ag(I) was 2932.91 mg/g. The Zn-AST exhibited good selectivity in the presence of Cu(II), Co(II), Ni(II), and Pb(II) ions, the removal rate for Ag(I) was 98.28 %, which was far higher than the values of other ions (all less than 10 %). The main adsorption mechanisms of Ag(I) by the Zn-AST involved electrostatic interactions, the formation of Ag–S bonds, and chelation between Ag and nitrogen functional groups. This study offers a viable strategy for developing unique adsorbents for Ag(I) removal from wastewater.
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高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Lina Dai,He Wang,Liru Cui,Yanduo Liu
Single photocatalysts face problems such as easy recombination of photo-generated charge carriers, weak oxidation-reduction ability, and narrow spectral response range, which greatly restrict their practical applications in energy and environmental fields. This article constructs a new type of Cu-Co Prussian blue analogues S-scheme photocatalytic material. The material is composed of oxidized photocatalysts (Ag 3 PO 4 ) and reduced photocatalysts (Cu-Co PBAs). By utilizing the characteristics of Cu-Co Prussian blue analogues photocatalysts, such as high conduction band position, rich catalytic sites, and small band gap, photocatalytic efficiency can be significantly enhanced. The CO production rate is 36.3 μmol/g/h, and the selectivity can reach 93.8 %, which is far superior to the current mainstream photocatalytic system. By studying the construction method and CO 2 reduction performance of the composite photocatalyst, the structure-performance relationship is clarified. The steady-state photocurrent spectroscopy reveals the S-scheme mechanism photocarrier transfer and separation kinetics. Techniques such as near-ambient pressure X-ray photoelectron spectroscopy reveal the interface electron transfer mechanism. In-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy and Density Functional Theory calculations are used to study the formation of reaction intermediates and reveal the catalytic mechanism. This study will offer critical understanding for advancing developments of selective photocatalysts aimed at sustainable CO 2 utilization.
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产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2012
·
IF 5.479
Gang Liu,Chang-Ming Dong
A photoresponsive S-(o-nitrobenzyl)-l-cysteine N-carboxyanhydride (NBC-NCA) monomer was for the first time designed, and the related poly(S-(o-nitrobenzyl)-l-cysteine)-b-poly(ethylene glycol) (PNBC-b-PEO) block copolymers were synthesized from the ring-opening polymerization (ROP) of NBC-NCA in DMF solution at 25 °C. Their molecular structures, physical properties, photoresponsive self-assembly, and drug release of PNBC-b-PEO were thoroughly investigated. The β-sheet conformational PNBC block within copolymers presented a thermotropic liquid crystal phase behavior, and the crystallinity of PEO block was progressively suppressed over the PNBC composition. The characteristic absorption peaks of these copolymers at about 310 and 350 nm increased over UV irradiation time and then leveled off, indicating that the o-nitrobenzyl groups were gradually photocleaved from copolymers until the completion of photocleavage. The PNBC-b-PEO copolymers self-assembled into spherical nanoparticles in aqueous solution, presenting a photoresponsive self-assembly behavior, together with a size reduction of nanoparticles after irradiation. The anticancer drug doxorubicin can be released in a controlled manner by changing the light irradiation time, which was induced by gradually photocleaving the PNBC core of nanoparticles. This work provides a facile strategy not only for the synthesis of photoresponsive polypeptide-based block copolymers but also for the fabrication of photoresponsive nanomedicine potential for anticancer therapy.
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高影响因子
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