摘要:
center dot Sugar transporter proteins (STPs) play critical roles in regulating plant stress tolerance, growth, and development. However, the role of STPs in regulating crop yield is poorly understood.center dot This study elucidates the mechanism by which knockout of the sugar transporter OsSTP15 enhances grain yield via increasing the tiller number in rice.center dot We found that OsSTP15 is specifically expressed in the shoot base and vascular bundle sheath of seedlings and encodes a plasma membrane-localized high-affinity glucose efflux transporter. OsSTP15 knockout enhanced sucrose and trehalose-6-phosphate (Tre6P) synthesis in leaves and improved sucrose transport to the shoot base by inducing the expression of sucrose transporters. Higher glucose, sucrose, and Tre6P contents were observed at the shoot base of stp15 plants. Transcriptome and metabolome analyses of the shoot base demonstrated that OsSTP15 knockout upregulated the expression of cytokinin (CK) synthesis-and signaling pathway-related genes and increased CK levels.center dot These findings suggest that OsSTP15 knockout represses glucose export from the cytoplasm and simultaneously enhances sugar transport from source leaves to the shoot base by promoting the synthesis of sucrose and Tre6P in leaves. Subsequent accumulation of glucose, sucrose, and Tre6P in the shoot base promotes tillering by stimulating the CK signaling pathway.
期刊:
Advanced Energy Materials,2024年 ISSN:1614-6832
通讯作者:
Fu, Lijun;Wu, YP;Ozoemena, KI
作者机构:
[Ye, Jilei; Liu, Lili; Yuan, Xuelong; Fu, Lijun; Yuan, Xinhai; Zhang, Shuaishuai; Wu, Yuping; Fu, LJ] Nanjing Tech Univ, Coll Chem Engn, Sch Energy Sci & Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Jiangsu, Peoples R China.;[Chen, Peng] Northeastern Univ, Minist Educ, Key Lab Ecol Met Multimet Minerals, Sch Met, Shenyang 110819, Peoples R China.;[Wu, Xiongwei] Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China.;[Wang, Tao; Wu, Yuping] Southeast Univ, Sch Energy & Environm, Confucius Energy Storage Lab, Nanjing 210096, Jiangsu, Peoples R China.;[Ozoemena, Kenneth I.; Ozoemena, KI] Univ Witwatersrand, Mol Sci Inst, Sch Chem, Private Bag 3, ZA-2050 Johannesburg, South Africa.
通讯机构:
[Wu, YP ; Fu, LJ] N;[Ozoemena, KI ] U;Nanjing Tech Univ, Coll Chem Engn, Sch Energy Sci & Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Jiangsu, Peoples R China.;Southeast Univ, Sch Energy & Environm, Confucius Energy Storage Lab, Nanjing 210096, Jiangsu, Peoples R China.;Univ Witwatersrand, Mol Sci Inst, Sch Chem, Private Bag 3, ZA-2050 Johannesburg, South Africa.
关键词:
Al metal;aqueous rechargeable Al-ion battery;cobalt hexacyanoferrate;high energy density
摘要:
Like other aqueous batteries, aqueous rechargeable Al-ion batteries (ARAIBs) have attracted much attention due to their high safety and low cost. However, the low energy density of ARAIBs limits its popularization and application. In order to solve this problem, in addition to choosing Al metal as the negative electrode, it is also necessary to choose a suitable positive electrode material. Here, a cubic phase cobalt hexacyanoferrate (CoHCF) with excellent rate and cycling performance is used as the positive electrode material. Due to the reversible catalysis of the Cl-/Cl0 reaction at high potential in saturated AlCl3 solution, it has the characteristics of high capacity up to 103.5 mAh g-1. Combined with the Al metal as negative electrode, an ARAIB with an average discharge voltage of 1.56 V and an energy density of 155 Wh kg-1 is constructed, which shows outstanding cycling and rate performances. An aqueous rechargeable Al-ion battery (ARAIB) using a cubic phase cobalt hexacyanoferrate as positive electrode shows excellent rate and cycling performance together with an average discharge voltage of 1.56 V and an energy density of 155 Wh kg-1.image
摘要:
The high activity of water molecules results in a series of awful parasitic reaction, which seriously impede the development of aqueous zinc batteries. Herein, a new gel electrolyte with multiple molecular anchors is designed by employing natural biomaterials from chitosan and chlorophyll derivative. The gel electrolyte firmly anchors water molecules by ternary hydrogen bonding to reduce the activity of water molecules and inhibit hydrogen evolution reaction. Meanwhile, the multipolar charged functional groups realize the gradient induction and redistribution of Zn2+, which drives oriented Zn (002) plane deposition of Zn2+ and then achieves uniform Zn deposition and dendrite-free anode. As a result, it endows the Zn||Zn cell with over 1700 h stripping/plating processes and a high efficiency of 99.4% for the Zn||Cu cell. In addition, the Zn||V2O5 full cells also exhibit capacity retention of 81.7% after 600 cycles at 0.5 A g(-1) and excellent long-term stability over 1600 cycles at 2 A g(-1), and the flexible pouch cells can provide stable power for light-emitting diodes even after repeated bending. The gel electrolyte strategy provides a reference for reversible zinc anode and flexible wearable devices.
通讯机构:
[Zhou, N ] H;Hunan Agr Univ, Hunan Engn Res Ctr Biochar, Changsha 410128, Peoples R China.;Hunan Agr Univ, Coll Chem & Mat Sci, Changsha 410128, Peoples R China.
摘要:
Transition-metal-catalyzed reactive oxygen species (ROS) play an important role in existing bactericidal systems, but there are some problems, such as poor stability, ease of dissolution, and difficulty in reusing. To address the issue of stability, we have developed a sufficient electron-donating (SED) system. In the presence of the two most active transition metals with multiple valences, several as-formed redox pairs can provide sufficient electrons, and then effectively trigger the reduction of H2O/O-2 to produce O-1(2), <middle dot>OH and <middle dot>O-2(-) without any assistance from extra energy or other active oxidants. Consequently, the SED system showed 100% removal efficiency for Escherichia coli in 2 h, and also showed remarkable stability and reusability with 85% inactivation after 11 repetitions. It is worth noting that <middle dot>OH and O-1(2) play a major role in the bactericidal process. While <middle dot>O-2(-) mainly plays a role in promoting the formation of O-1(2) and <middle dot>OH.
摘要:
Abstract Existing studies on the environmental Kuznets curve (EKC) neglect the inverse effect of pollution transfer from environmental regulation interactions on pollution reduction from a risk analysis perspective. Based on the regional differentiated attitudes on the environmental regulation reached in risk communication by the risk awareness biases of multiple interest groups, this article clarifies the causality between risk communication and risk transfer based on multistakeholder engagement processes; furthermore, the article incorporates the simultaneous action of the technological innovation effect and pollution risk transfer effect to construct a spatial environmental hyperbolic model with a bidirectional correlation between pollution emissions and economic growth in different regions. To verify our model, we select the pollution from agricultural watersheds in China as a sample to examine the two inverse effects. The results demonstrate that (1) agricultural watershed pollution and economic growth show an inverted U‐shaped relation and a U‐shaped relation in the local region and adjacent regions, respectively; (2) the pollution reduction assessment of the classical EKC model can be largely attributed to pollution risk transfer behavior; and (3) the turning point of the U‐shaped curve appears earlier than that of the inverted U‐shaped curve in the spatial hyperbola model. The findings suggest that stakeholders should consider the risk awareness bias caused by the imbalance of regional economic development and the scenarios that provide a “haven” for pollution risk transfer. Moreover, our study expands the theoretical connotation of the classical EKC hypothesis and is more suitable for pollution reduction scenarios in developing countries.
摘要:
Lignin and cellulose are two essential elements of plant secondary cell walls that shape the mechanical characteristics of the culm to prevent lodging. However, how the regulation of the lignin and cellulose composition is combined to achieve optimal mechanical characteristics is unclear. Here, we show that increasing OsTCP19 expression in rice coordinately repressed lignin biosynthesis and promoted cellulose biosynthesis, resulting in enhanced lodging resistance. In contrast, repression of OsTCP19 coordinately promoted lignin biosynthesis and inhibited cellulose biosynthesis, leading to greater susceptibility to lodging. We found that OsTCP19 binds to the promoters of both MYB108 and MYB103L to increase their expression, with the former being responsible for repressing lignin biosynthesis and the latter for promoting cellulose biosynthesis. Moreover, up-regulation of OsTCP19 in fibers improved grain yield and lodging resistance. Thus, our results identify the OsTCP19-OsMYB108/OsMYB103L module as a key regulator of lignin and cellulose production in rice, and open up the possibility for precisely manipulating lignin-cellulose composition to improve culm mechanical properties for lodging resistance.
关键词:
Soil organic matter;Spatial prediction;Digital soil mapping;Sampling density optimization;Random forest
摘要:
Purpose Spatial prediction of soil organic matter (SOM) in cultivated land is crucial for evaluating soil productivity and its role in terrestrial carbon cycling. Cultivated soils in mountainous regions are commonly scattered on the footslope whereas those in the plain regions are continuously planar distributed; hence, they are quite different in the degree of variation in soil-forming factors and thereby the soil properties including SOM. Materials and methods In this study, we used the digital soil mapping approach (DSM) to predict SOM (0-20 cm) in cultivated soils in a hill-mountain region, Longshan County (LS), and a plain-platform region, Nanxian County (NX), which are both located at the same latitude in Southern China. By using 6746 and 9571 soil sampling points for LS and NX, respectively, together with 33 environmental covariates, the optimal spatial interpolation models and the reasonable sample strategy were carefully discussed. Results and discussion Descriptive statistical results showed that SOM in LS and NX were both moderate variations (coefficient variation, 0.34) and were approximately normal distribution. SOM in NX was strongly spatially dependent while SOM in LS was a moderate spatial dependence. The conditional Latin hypercube sampling (cLHS) was more appropriate compared with the Simple Random Sampling (SRS) as the sampling strategy. The optimal model for predicting cultivated land SOM was the Random Forest (RF) model for both LS and NX. The prediction accuracy was positively correlated with the sampling density. Specifically, to obtain a high prediction accuracy, the reasonable sampling density for SOM in LS should be controlled at >= 4.0 per km(2), higher than that in NX (>= 2.0 per km(2)). Conclusions The combination of cLHS and the RF model probably is the best choice for cultivated land SOM spatial prediction in different terrains. Therefore, our results provide a basis for future DSM of SOM in similar regions and help optimize soil sampling density.
通讯机构:
[Yang, Y ; Wu, HZ ] H;Hunan Prov Inst Prod & Goods Qual Inspect, Changsha 410007, Peoples R China.;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
摘要:
The emerging sample pretreatment technique of magnetic solid-phase extraction (MSPE) has drawn the attention of researchers owing to its advantages of less reagent consumption, fast separation/enrichment process, high adsorption capacity, and simple operation. This paper presents a review of synthesis techniques, classification, and analysis procedures for MSPE in the detection of heavy metals in food. Magnetic adsorbents derived from silica, metal oxides, carbon, polymers, etc., are applied for the detection of heavy metals in food. Then, the recent development of the technology of MSPE for the analysis of heavy metal extraction in food is summarized in detail. Finally, the future outlook for the improvement of MSPE is also discussed. The emerging sample pretreatment technique of magnetic solid-phase extraction (MSPE).
关键词:
High protein diet;L-Theanine;Neurotransmitters;Nutritional intervention
摘要:
Excessive protein intake causes liver and brain damage and neurotransmitter disorders, thereby inducing cognitive dysfunction. L-theanine can regulate the neurotransmitter content and show great potential in liver and brain protection. However, it remains unclear whether l-theanine effectively regulates neurotransmitter content under high-protein diet. A 40-day feeding experiment was performed in Sprague Dawley rats to investigate the regulatory effects and mechanisms of l-theanine on neurotransmitters via liver-brain axis in high-protein diets. The results showed that a 30% protein diet increased the liver and brain neurotransmitter content while maintaining the normal structure of liver and the hippocampal CA1 of brain and improving the autonomous behavior of rats. In contrast, 40% and 50% protein diets decreased the content of neurotransmitters, affected autonomous behavior, destroyed the hippocampal CA1 of brain structure, increased hepatic inflammatory infiltration, lipid degeneration, and hepatocyte eosinophilic change in liver, increased liver AST, ALT, MDA, CRP, and blood ammonia level, and decreased liver SOD and CAT level. However, l-theanine improved liver and brain neurotransmitter content, autonomous behavior, liver and hippocampal brain structure, and liver biochemical indicators in 40% and 50% protein diets. To explore how LTA can eliminate the adverse effects of a high-protein diet, we analyzed different metabolites and proteomes and using western blotting for validate quantitatively. We found that l-theanine regulates the activity of PF4 and G protein subunit alpha i2, increases the content of brain-derived neurotrophic factor and dopamine under a 20% protein diet. In addition, l-theanine can activate the adenylate cyclase-protein kinase A pathway through the protein alpha/beta-hydrolase domain protein 12 to regulate the content of neurotransmitters under a 40% protein diet, thereby exerting a neuroprotective effect.
摘要:
Soil salinity seriously hinders the sustainable development of green agriculture. The emergence of engineered nanomaterials has revolutionized agricultural research, providing a new means to overcome the limitations associated with current abiotic stress management and achieve highly productive agriculture. Herein, we synthesized a brand-new engineered nanomaterial (Cs-Se NMs) through the Schiff base reaction of oxidized chitosan with selenocystamine hydrochloride to alleviate salt stress in plants. After the addition of 300 mg/L Cs-Se NMs, the activity of superoxide dismutase, catalase, and peroxidase in rice shoots increased to 3.19, 1.79, and 1.85 times those observed in the NaCl group, respectively. Meanwhile, the MDA levels decreased by 63.9%. Notably, Cs-Se NMs also raised the transcription of genes correlated with the oxidative stress response and MAPK signaling in the transcriptomic analysis. In addition, Cs-Se NMs augmented the abundance and variety of rhizobacteria and remodeled the microbial community structure. These results provide insights into applying engineered nanomaterials in sustainable agriculture.
作者:
Su, Zhaohong;Hu, Shiyu;Zhang, Yuhang;Liang, Zhanning;Peng, Yi;...
期刊:
Analyst,2024年149(1):188-195 ISSN:0003-2654
通讯作者:
Zhu, Zhiyang;He, Pei;Li, ZJ
作者机构:
[Su, Zhaohong; Li, Zhenjie; Zhu, Zhiyang; He, Pei; He, P; Li, ZJ] China Tobacco Yunnan Ind Co Ltd, Yunnan Key Lab Tobacco Chem, R&D Ctr, Kunming 650231, Peoples R China.;[Liang, Zhanning; Su, Zhaohong; Yu, Xia; Hu, Shiyu; Zhang, Yuhang; Peng, Yi; Cao, Qinyi] Hunan Agr Univ, Coll Chem & Mat Sci, Coll Agron, Changsha 410128, Peoples R China.
通讯机构:
[Zhu, ZY; He, P; Li, ZJ ] C;China Tobacco Yunnan Ind Co Ltd, Yunnan Key Lab Tobacco Chem, R&D Ctr, Kunming 650231, Peoples R China.
摘要:
Herein, the electrodeposition of paracetamol oxide (PA ox) for the intelligent portable ratiometric detection of nicotine (NIC) and ethyl vanillin β-D-glucoside (EVG) is reported. PA ox electrodeposited on a screen-printed carbon electrode (SPCE) was used as a new fixed state ratiometric reference probe. A portable electrochemical workstation combined with a smart phone was applied as an intelligent portable electrochemical sensing platform. The sensor was studied by scanning electron microscopy (SEM), Fourier transform infrared spectrophotometry (FT-IR), ultraviolet-visible spectrophotometry (UV-vis), theoretical calculation, chronoamperometry, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and square wave voltammetry (SWV). Under optimized conditions, the detection range of NIC is 10-200 μmol L(-1), and the detection limit is 0.256 μmol L(-1). The detection range of EVG was 10-180 μmol L(-1), and the detection limit was 0.058 μmol L(-1). The sensor can realize the real-time detection of NIC and EVG concentration in cigarette samples quickly and accurately, and has good anti-interference, repeatability and stability.
作者机构:
[Yang, JL; Lu, Bingyi; Yang, Jinlong] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen Key Lab Energy Electrocatalyt Mat, Guangdong Res Ctr Interfacial Engn Funct Mat, Shenzhen 518060, Peoples R China.;[Lu, Bingyi] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China.;[Zhou, Guangmin; Xiao, Xiao; Lao, Zhoujie; Lu, Bingyi; Liu, Yingqi; Zhou, GM; Wu, Xinru] Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China.;[Zhou, Guangmin; Xiao, Xiao; Lao, Zhoujie; Lu, Bingyi; Liu, Yingqi; Zhou, GM; Wu, Xinru] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China.;[Chen, Biao] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China.
通讯机构:
[Yang, JL ] S;[Zhou, GM ] T;Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen Key Lab Energy Electrocatalyt Mat, Guangdong Res Ctr Interfacial Engn Funct Mat, Shenzhen 518060, Peoples R China.;Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China.;Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China.
关键词:
bidirectional catalyst;coulombic efficiency;energy band engineering;Li-CO2 batteries
摘要:
Abstract Li‐CO2 batteries have aroused great interest in the context of carbon neutralization, but their practicability is severely hindered by the sluggish CO2 redox reaction kinetics at the cathode, which brings about formidable challenges such as high overpotential and low Coulombic efficiency. For the complex multi‐electron transfer process, the design of catalysts at the molecular or atomic level and the understanding of the relationship between electron state and performance are essential for the CO2 redox. However, little attention has been paid to it. In this work, using Co3S4 as a model system, density functional theory calculations reveal that the adjusted d‐band and p‐band centers of Co3S4 with the introduction of Cu and sulfur vacancies are hybridized between CO2 and Li species, respectively, which is conducive to the adsorption of reactants and the decomposition of Li2CO3, and the experimental results further verify the effectiveness of energy band engineering. As a result, a highly efficient bidirectional catalyst is produced, and shows an ultra‐small voltage gap of 0.73 V and marvelous Coulombic efficiency of 92.6%, surpassing to those of previous catalysts under similar conditions. This work presents an effective catalyst design and affords new insight into the high‐performance cathode catalyst materials for Li‐CO2 batteries. This article is protected by copyright. All rights reserved
摘要:
Abstract Soil protease plays a fundamental role in soil nitrogen (N) transformations. Soil N and phosphorus (P) management significantly influence soil protease activity. However, the impacts of N and P combined modification on soil protease remain unclear. A better understanding of the activity and dynamic of soil protease could provide new insights into soil N cycling and available N supply. This study aimed to quantify the influences of combined effects of N and P managements on soil protease activities and decipher the potential mechanism from the perspectives of soil chemical properties, functional microbes, and functional genes. The nitrification inhibitor 3, 4‐dimethylpyrazole phosphate (DMPP) application or phosphate‐solubilizing bacteria (PSB) Klebsiella inoculation significantly increased soil protease activity (23.39% and 70.99%, respectively) and ammonium N (NH4+–N) contents, relative to the blank control. However, compared with the DMPP or PSB alone application, the combined applications of DMPP and PSB significantly decreased protease activity, implying that an antagonistic effect on soil protease activity was generated. The abundances of genus Klebsiella were stimulated by the DMPP or PSB but significantly inhibited by the combined additions of DMPP and PSB. The DMPP and PSB applications also significantly changed soil microbial communities and led to more complicated soil microbial co‐occurrence networks. Soil protease activity had a significantly positive correlation with the normalized abundances of tri and clpX genes. Our findings suggested that the combined additions of DMPP and PSB generated an antagonistic effect on soil protease activity and that the antagonistic effect was directly associated with soil NH4+–N and NO3−–N contents, P fractions, and functional gene abundances.
作者机构:
[Xiao, Xiao; Lu, Bingyi; Wang, Boran; Mao, Rui; Liu, Yingqi; Zhou, Guangmin; Lu, Gongxun; Song, Yanze] Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China.;[Xiao, Xiao; Lu, Bingyi; Wang, Boran; Mao, Rui; Liu, Yingqi; Zhou, Guangmin; Lu, Gongxun; Song, Yanze] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China.;[Yang, JL; Lu, Bingyi; Yang, Jinlong] Shenzhen Univ, Coll Mat Sci & Engn, Guangdong Res Ctr Interfacial Engn Funct Mat, Shenzhen Key Lab Energy Electrocatalyt Mat, Shenzhen 518060, Peoples R China.;[Min, Zhiwen; Sun, YM; Sun, Yuanmiao] Chinese Acad Sci, Fac Mat Sci & Energy Engn, Shenzhen Inst Adv Technol, Inst Technol Carbon Neutral, Shenzhen 518055, Peoples R China.;[Chen, Biao] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China.
通讯机构:
[Yang, JL ] S;[Sun, YM ] C;[Zhou, GM ] T;Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China.;Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China.
关键词:
bidirectional catalysts;in-built electric fields;Li-CO2 batteries;overpotential;spent lithium-ion batteries
摘要:
One critical challenge of lithium‐carbon dioxide (Li‐CO2) batteries is to develop highly efficient and low‐cost catalysts with precise structure. A tandem catalyst with an in‐built electric field is elaborately recycled from the spent batteries and exhibits remarkable bidirectional activities. This work affords new opportunities to fabricate low‐cost electrocatalysts and inspires fresh perceptions of interfacial regulation to engineer better Li‐CO2 batteries. Abstract Lithium‐carbon dioxide (Li‐CO2) batteries are regarded as a prospective technology to relieve the pressure of greenhouse emissions but are confronted with sluggish CO2 redox kinetics and low energy efficiency. Developing highly efficient and low‐cost catalysts to boost bidirectional activities is craved but remains a huge challenge. Herein, derived from the spent lithium‐ion batteries, a tandem catalyst is subtly synthesized and significantly accelerates the CO2 reduction and evolution reactions (CO2RR and CO2ER) kinetics with an in‐built electric field (BEF). Combining with the theoretical calculations and advanced characterization techniques, this work reveals that the designed interface‐induced BEF regulates the adsorption/decomposition of the intermediates during CO2RR and CO2ER, endowing the recycled tandem catalyst with excellent bidirectional activities. As a result, the spent electronics‐derived tandem catalyst exhibits remarkable bidirectional catalytic performance, such as an ultralow voltage gap of 0.26 V and an ultrahigh energy efficiency of 92.4%. Profoundly, this work affords new opportunities to fabricate low‐cost electrocatalysts from recycled spent electronics and inspires fresh perceptions of interfacial regulation including but not limited to BEF to engineer better Li‐CO2 batteries.
摘要:
Although low-rank representation (LRR)-based subspace learning has been widely applied for feature extraction in computer vision, how to enhance the discriminability of the low-dimensional features extracted by LRR based subspace learning methods is still a problem that needs to be further investigated. Therefore, this paper proposes a novel low-rank preserving embedding regression (LRPER) method by integrating LRR, linear regression, and projection learning into a unified framework. In LRPER, LRR can reveal the underlying structure information to strengthen the robustness of projection learning. The robust metric L-2,L-1-norm is employed to measure the low-rank reconstruction error and regression loss for moulding the noise and occlusions. An embedding regression is proposed to make full use of the prior information for improving the discriminability of the learned projection. In addition, an alternative iteration algorithm is designed to optimise the proposed model, and the computational complexity of the optimisation algorithm is briefly analysed. The convergence of the optimisation algorithm is theoretically and numerically studied. At last, extensive experiments on four types of image datasets are carried out to demonstrate the effectiveness of LRPER, and the experimental results demonstrate that LRPER performs better than some state-of-the-art feature extraction methods.
通讯机构:
[Qin, XL ] H;Hunan Agr Univ, Coll Chem & Mat Sci, Changsha 410128, Peoples R China.
关键词:
Metal-organic frameworks;Triethanolamine;Graphene oxide;Gold nanoparticles;Heavy metal ions
摘要:
This work provides a facile electrochemical method for simultaneous detection of Cd2+, Pb2+, and Cu2+, on the base of one-pot synthesis of triethanolamine (TEOA)-functionalized gold nanoparticle (AuNP)-metal-organic framework-graphene oxide nanocomposites (TEOA@AuNPs-GO-UiO-66-NH2). In this method, TEOA not only can act as a base for the deprotonation of 2-aminoterephthalic acid, leading to in situ synthesizing the UiO-66-NH2 on the GO nanosheets by a one-step hydrothermal method, but also can be used as a reductant reacted with HAuCl4 to form AuNPs, improving the conductivity of the composite by accelerating the electron transfer. Moreover, this composite can serve as an enrichment medium phase of heavy metal ions because of the interaction between metal cations and hydrophilic groups of TEOA, UiO-66-NH2, or GO, which have the synergic effect of enhancing the electrochemical signals. The morphology and structure information of TEOA@AuNPs-GO-UiO-66-NH2 composite were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectrometer (FT-IR). Under the optimal conditions, the TEOA@AuNPs-GO-UiO-66-NH2-modified electrode was applied for individual and simultaneous electrochemical detection for the Cd2+, Pb2+, and Cu2+ in an acetic acid buffer solution with satisfactory linear range and significantly low limits of detection. This electrochemical sensor was successfully utilized for simultaneous detection of Cd2+, Pb2+, and Cu2+ in river water with great selectivity and accuracy, displaying great potential application in food safety and environmental monitoring.
摘要:
Low-grade chronic inflammation, also known as metabolic inflammation, promotes the development of metabolic diseases. Increasing evidence suggests that changes in gut microbes and metabolites disrupt the integrity of the gut barrier and exert significant effects on the metabolism of various tissues, including the liver and adipose tissue, thereby contributing to metabolic inflammation. We observed that IL-22 is a key signaling molecule that serves as a bridge between intestinal microbes and the host, effectively alleviating metabolic inflammation by modulating the host immunomodulatory network. Here, we focused on elucidating the underlying mechanisms by which the gut microbiota and their metabolites reduce inflammation via IL-22, highlighting the favorable impact of IL-22 on metabolic inflammation. Furthermore, we discuss the potential of IL-22 as a therapeutic target for the management of metabolic inflammation and related diseases.
通讯机构:
[Tiean Zhou; Yanyang Wu] C;College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Hunan Provincial Engineering Technology Research Center for Cell Mechanics and Function Analysis, Changsha 410128, China<&wdkj&>College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China