Frontiers in Chemistry
·
2021
·
IF 5.221
Yan Kang,Liu Liping,Zhao Hongxing,Tian Lei,Xu Zhifeng,Wang Ruixiang
To overcome the problem of arsenic separation and enrichment from an alkaline leaching solution in arsenic-containing dust, a CO32--type tri-n-octylmethyl-ammonium chloride (TOMAC) method for extracting thioarsenite is proposed in this paper. Considering an alkaline leaching solution as the research object, after vulcanization pretreatment, TOMAC transformation and organic phase saturated extraction capacity were measured, and the extraction mechanism was preliminarily studied. First, Cl−-type quaternary ammonium salt was effectively transformed to HCO3--type by treating organic phase with saturated NaHCO3five times. TOMAC was effectively transformed from HCO3- to CO32- type by alkaline washing with 1.0 mol/l NaOH solution; this washing was repeated thrice. Thereafter, the effects of organic phase composition, phase ratio, extraction time, and temperature on the extraction and separation of arsenic were investigated. The results show that under the conditions of 30% CO32--type TOMAC + 15% sec-octanol + 55% sulfonated kerosene, VO/VA = 1/1, and 5 min extraction at room temperature, the single-stage extraction rate of AsIII is 85.2%. The AsIII concentration in raffinate can be reduced to less than 1.33 × 10−3 mol/l by four-stage countercurrent extraction, and the extraction rate of AsIII can exceed 98.4%.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Long Liu,Ning Chen,Yong Lei,Xuyan Xue,Lina Li,Jiancheng Wang,Sridhar Komarneni,Huaiyong Zhu,Dongjiang Yang
Removal of the toxic selenium compounds, selenite (SeO 3 2− ) and selenate (SeO 4 2− ), from contaminated water is imperative for environmental protection in both developing and industrialized countries. Providing high selectivity adsorbents to the target ions is a big challenge. Here we report that micro sphere-like δ-Bi 2 O 3 (MS-δ-Bi 2 O 3 ) with surface oxygen vacancy defects can capture hypertoxic SeO x 2− anions from aqueous solutions with superior capacity and fast uptake rate. High capture selectivity to SeO 3 2− anions is observed, since the O atoms of SeO 3 2− anions fill the oxygen vacancies on the (111) facet of δ-Bi 2 O 3 forming a stable complex structure. This mechanism is distinctly different from other known mechanisms for anion removal, and implies that we may utilize surface defects as highly efficient and selective sites to capture specific toxic species. Thus, we present a new route here to design superior adsorbents for toxic ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 58
·35007-35016
·
IF 3.119
Guo-Cheng Han,Huifang Li,Annaleizle Ferranco,Tao Zhan,Yunyun Cheng,Zhencheng Chen,Mingyue Xue,Xiao-Zhen Feng,Heinz-Bernhard Kraatz
Several simple sensors were fabricated through a one-step method. By depositing electro-active compounds, such as β-cyclodextrins (β-CD), heme, dopamine (DA), or Fc-ECG, onto a screen-printed electrode (SPE), the successful simultaneous detection of nitrite (NO2−) and thiosulfate (S2O32−) ions was observed. Under optimal operating conditions, the notable electrocatalytic abilities of a Heme/SPE sensor were detected for the oxidation of NO2− and S2O32−, with remarkable peak potential differences, after characterization via SEM, CV, and DPV. Linear relationships were obtained in the ranges of 5.0–200.0 μmol L−1 and 1.0–100.0 μmol L−1 for the current response versus concentration of NO2− and S2O32−, respectively. The limits of detection were determined to be 1.67 and 0.33 μmol L−1 while the sensitivities of detection were noted to be 0.43 and 1.43 μA μM−1 cm−2, respectively. During the detection of NO2− and S2O32−, no interfering common ions were observed. Furthermore, average recoveries from 96.0 to 104.3% and a total R.S.D. of less than 3.1% were found for the detection of NO2− and S2O32− in pickled juice and tap water using the simple sensor. These results showed that rapid and precise measurements for actual application in NO2− and S2O32− detection could be conducted in food samples, indicating a potential use in food safety.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BMC MICROBIOLOGY
·
2025
·Vol. 25
·期 1
·1-12
·
IF 4.2
Yang Manli,Zuo Shanningmei,Liu Ahui,Zhong Nana,Lu Xueping,Liu Xun,Jiang Xiasen,Hu Tao,Liu Yuntong,Ren Xiaogang,Zhou Kang,Wu Chuansheng
Background Bisphenol A (BPA), a widespread environmental pollutant, has been extensively studied for its effects on bacteria and plant, but its impact on rhizosphere bacterial communities and plant root traits is less understood. At the same time, the role of bacteria in helping plants resist adversity is widely recognized, but the relationship between BPA-induced with rhizosphere bacterial changes and root development is still unclear. Therefore, this study investigated the effects of varying BPA concentrations (1.5, 17.2, and 50 mg/L) on soybean root traits and rhizosphere bacterial communities, as well as the relationship between them. Result The results revealed that BPA exposure significantly altered root traits, with root length, surface area, volume, and tip numbers being suppressed at 50 mg/L, while lower concentrations (1.5 and 17.2 mg/L) promoted root elongation and thickening. Bacterial community composition shifted notably, with Bacillota increasing and Pseudomonadota decreasing in relative abundance across all BPA treatments. Alpha diversity, measured by richness and Shannon_e indices, increased slightly at lower BPA concentrations, while beta diversity (Bray_Curtis and UniFrac) analysis showed significant differences, particularly at 50 mg/L. Community assembly processes (βNRI and βNTI) were dominated by deterministic mechanisms at lower BPA concentrations but shifted toward stochastic processes at 50 mg/L. Correlation analysis revealed significant relationships between bacterial community dynamics and root traits (Principal component PC1 and PC2), with alpha diversity indices influencing root traits represented by PC2 and beta diversity indices showing a negative correlation with PC1. Conclusions BPA exposure not only alters root morphology and bacterial community structure but also highlights the intricate interplay between rhizosphere bacteria and plant roots under BPA stress. This study contributes to the theoretical understanding of plant–microbe interactions in contaminated environments and may inform future research on microbial involvement in plant stress responses.
研究领域:
植物科学
·
环境毒理学
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微生物生态学
·
农业污染
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Microbiology
·
2020
·
IF 4.236
Zhang Shujuan,You Zhaoyang,Guo Xinyue,Yun Wenfei,Xia Yu,Rillig Matthias C.
Employing mycorrhiza-defective mutants and their progenitors does not require inoculation or elimination of the resident microbial community in the experimental study of mycorrhizal soil ecology. We aimed to examine the suitability of mycorrhiza-defective rice (non-mycorrhizal, Oryza sativa L., cv. Nipponbare) and its progenitor (mycorrhizal) to evaluate nitrogen (N) loss control from paddy fields via arbuscular mycorrhizal (AM) fungi. We grew the two rice lines in soils with the full community of AM fungi and investigated root AM colonization. In the absence of AM fungi, we estimated rice N content, soil N concentration and microbial community on the basis of phospholipid fatty acids; we also quantified N loss via NH3 volatilization, N2O emission, runoff and leaching. In the presence of AM fungi, we did not find any evidence of AM colonization for non-mycorrhizal rice while mycorrhizal rice was colonized and percentage of root colonization was 17–24%. In the absence of AM fungi, the two rice lines had similar N content, soil N concentration and microbial community. Importantly, there was no significant difference in N loss via all the four pathways between mycorrhizal and non-mycorrhizal systems. This mycorrhizal/non-mycorrhizal rice pair is suitable for further research on the role of AM fungi in the control of soil N loss in paddy fields.
研究领域:
植物学
·
土壤学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 20
·3798
·
IF 3.06
Emmanuel Bresso,Diana Fernandez,Deisy X. Amora,Philippe Noel,Anne-Sophie Petitot,Maria-Eugênia Lisei de Sa,Erika V. S. Albuquerque,Etienne G. J. Danchin,Bernard Maigret,Natália F. Martins
Root-knot nematodes (RKN), from theMeloidogynegenus, have a worldwide distribution and cause severe economic damage to many life-sustaining crops. Because of their lack of specificity and danger to the environment, most chemical nematicides have been banned from use. Thus, there is a great need for new and safe compounds to control RKN. Such research involves identifying beforehand the nematode proteins essential to the invasion. Since G protein-coupled receptors GPCRs are the target of a large number of drugs, we have focused our research on the identification of putative nematode GPCRs such as those capable of controlling the movement of the parasite towards (or within) its host. A datamining procedure applied to the genome ofMeloidogyne incognitaallowed us to identify a GPCR, belonging to the neuropeptide GPCR family that can serve as a target to carry out a virtual screening campaign. We reconstructed a 3D model of this receptor by homology modeling and validated it through extensive molecular dynamics simulations. This model was used for large scale molecular dockings which produced a filtered limited set of putative antagonists for this GPCR. Preliminary experiments using these selected molecules allowed the identification of an active compound, namely C260-2124, from the ChemDiv provider, which can serve as a starting point for further investigations.Keywords:Meloidogyne incognita;homology modelling;molecular dynamics;virtual screening
研究领域:
植物保护
·
生物信息学
✓ 已验证
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2020
·
IF 4.872
You-Wei Xiong,Xue-Wei Li,Tian-Tian Wang,Yuan Gong,Chun-Mei Zhang,Ke Xing,Sheng Qin
Halophytes play an important role in the bioremediation of saline soils . Increased evidence has revealed that plant growth-promoting rhizobacteria (PGPR) have colonized the halophytic rhizosphere, and they have evolved the capacity to reduce salt stress damage to the host. However, the mechanism by which halophytes attract and recruit beneficial PGPR has rarely been reported. This study reports the interaction between the halophyte Limonium sinense and its rhizosphere PGPR strain Bacillus flexus KLBMP 4941, as well as the mechanism by which KLBMP 4941 promotes host plant growth under salt stress. After salt stress treatment, we collected the root exudates (REs) of L. sinense and found that the REs could promote the growth and chemotaxis of the bacterium KLBMP 4941. In addition, the components of the REs under salt stress were analyzed, and some organic acids ( 2-methylbutyric acid , stearic acid , palmitic acid , palmitoleic acid, and oleic acid) were detected as the major components. Further assessment showed that each of these components had positive effects on the growth, motility, chemotaxis, and root colonization of strain KLBMP 4941. Further pot experiments revealed the potential PGP mechanisms induced by strain KLBMP 4941 on the host plant under salt stress. Inoculation with KLBMP 4941 promoted the accumulation of chlorophyll to enhance photosynthesis, increased osmotic regulator contents, enhanced flavonoid and antioxidant enzymes, and regulated Na + /K + homeostasis to help the host ameliorate salinity stress damage. Our findings indicate that the halophyte L. sinense can attract and recruit beneficial rhizosphere bacteria by REs under salt stress, and the recruited B. flexus KLBMP 4941 elicited PGP effects under salinity stress through complex plant physiological regulatory mechanisms. This study provides a foundation for the enhancement of the rhizosphere colonization ability of the PGP strain KLBMP 4941, which shows potential applications in phytoremediation of saline soils.
研究领域:
植物学
·
微生物学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Miaomiao He,Yuxuan Chen,Guangyuan Chen,Wenhao Li,Mingxing Zhang,Chao Zhang,Hao Zhang,Xingyi Long,Kui Tang,Tao Duan,Lin Zhu
The extraction of 99 TcO 4 − from radioactive effluents is extremely crucial for the purposes of nuclear disposal and environmental remediation. Herein, utilizing a facile and low-cost synthesis method, we report a pyridinium-based cationic polymer network , CPP-Cl, with impressive adsorption performance and ultrafast adsorption kinetics towards ReO 4 − . The structure featuring highly density of charged pyridinium units was synthesized, making it an effective adsorbent for capturing ReO 4 − . The material showed fast ReO 4 − adsorption kinetics reaching adsorption equilibrium within 30 s, an excellent capture capability of 1069.7 mg/g, and exceptional separation efficiency of 94.3% for removing 1000 ppm ReO 4 − . Furthermore, it possessed excellent reusability in multiple sorption/desorption trials and good uptake capacity within a widely ranging pH values. It is noteworthy that the extraction efficiency of CPP-Cl for ReO 4 − from simulated nuclear waste can be up to 94.2%. The favorable performance of the material in multiple tests revealed that CPP-Cl has tremendous potential as a high-efficiency sorbent for capturing 99 TcO 4 − /ReO 4 − in complex nuclear associated environmental systems.
研究领域:
环境科学
·
核化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
C. Liu,X. Chi,J. Huang,Y. Liu
Development of rechargeable alkaline Zn–Mn batteries has been facing big challenges for low working voltage and poor cycling stability, although they have advantages of low cost, high safety, and simple maintenance. For the first time, this work demonstrates a record high voltage (1.78 V) for rechargeable alkaline Zn–MnO 4 − battery achieved by a high reversible redox pair of MnO 4 − /MnO 4 2− , which shows excellent cycling stability up to 1,500 cycles at a high current density of 20 mA cm −2 without obvious capacity attenuation. The MnO 4 − /MnO 4 2− redox reaction investigated by ex-situ scanning electron microscope as well as ultraviolet and visible absorption spectrum indicates high reversibility of the MnO 4 − /MnO 4 2− redox couple after the activation during the first discharge process. Furthermore, benefiting from the liquid-phase reaction nature of MnO 4 − /MnO 4 2− , a flow battery is further prototyped to show highly stable cycles with 95.8% of discharge capacity retention for 600 cycles at the current density of 40 mA cm −2 .
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Regenerative Biomaterials
·
2024
·
IF 5.6
Cheng Yu,Huangfu Yini,Zhao Tingyuan,Wang Linxian,Yang Jing,Liu Jie,Feng Zujian,Que Kehua
The utilization of intracanal medicaments is an indispensable procedure in root canal treatment（RCT）. However, the conventional intracanal medicaments still need improvement regarding antimicrobial efficacy and ease of clinical operation. To address the above issues, OCT/PECT@OCT+ALK composite hydrogel characterized by programming sequential release of dual antimicrobial agents has been proposed. Thanks to the self-assemble ability of amphiphilic copolymer poly(ε-caprolactone-co-1,4,8-trioxa [4.6]spiro -9-undecanone)-poly(ethylene glycol)-poly(ε-caprolactone-co-1,4,8-trioxa [4.6]spiro-9- undecanone) (PECT), dual hydrophilic and hydrophobic antimicrobial agents could be easily encapsulated in the hydrogel system, and tailored for sequential drug release for a better antibiofilm effect. The hydrophilic octenidine (Octenidine dihydrochloride, OCT-HCl) is encapsulated in the hydrophilic part of hydrogel for instantaneous elevating the drug concentration through bursting release, and the hydrophobic octenidine(Octenidine, OCT) is further loaded into the PECT nanoparticles to achieve a slower and sustained release profile. Additionally, calcium hydroxide (Ca(OH)2) was incorporated into the system and evenly dispersed among PECT nanoparticles to create an alkaline (ALK) environment, synergistically enhancing the antibiofilm effect with higher efficiency and prolonged duration. The antibiofilm effect has been demonstrated in root-canal models and apical periodontitis rats, exhibiting superior performance compared to clinically used Ca(OH)2 paste. This study demonstrates that OCT/PECT@OCT+ALK composite thermosensitive hydrogel is a potential intracanal medicament with excellent antibiofilm effect and clinical operability.
研究领域:
牙科学
·
材料科学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Xue Wang,Lu-Kang Zhao,Si-Yao Li,Ran Wei,Xuanwen Gao,Zhaomeng Liu,Wenbin Luo
The electrocatalytic reduction of carbon dioxide (CO2) and different nitrogenous substances has shown a broad prospect in replacing the traditional urea synthesis process, but there are still serious challenges in mass transfer at the gas-liquid-solid interface. Unlike conventional CO2 as a carbon source, the conversion of HCO3- and NO3- to urea by C-N coupling process under environmental conditions is a promising alternative to traditional industrial urea synthesis. However, initiating the C-N coupling reaction through the adsorption and activation of HCO3- and NO3- is considerably challenging. Designing and engineering highly selective and active electrocatalysts is necessary to accelerate electrochemical urea synthesis. Herein, we construct a Mott-Schottky heterogeneous catalyst by loading Cu nanoparticles onto WN nanosheets (Cu-WN), achieving the excellent Faradic efficiency (FE) of 15.9% and urea yield rate of 421 µg h-1 mgcat-1 at -0.3V (vs. RHE), outperforming the majority of reported electrocatalysts. The results show the spatial charge region induced by Mott-Schottky heterostructure facilitates the simultaneous adsorption and activation of HCO3- and NO3-, accelerating the multiple-electron transfer process. This work furnishes a promising impetus for the advancement of urea electrosynthesis via electrochemical C-N coupling under ambient conditions.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DEVELOPMENTAL CELL
·
2024
·
IF 10.7
Xixi Cai,Hang Zhang,Changqing Mu,Yanjun Chen,Chongzhen He,Mingyu Liu,Thomas Laux,Limin Pi
In multicellular organisms, communication between cells is vital for their fate determination. In plants, the quiescent center (QC) signals to adjacent stem cells to maintain them undifferentiated. However, how surrounding stem cells instruct the QC remains poorly understood. Here, we show that in the Arabidopsis root, microRNA160 (miR160) moves from stele stem cells (SSCs) to the QC, where it degrades the mRNAs of two auxin response factors, ARF10 and ARF17 . This degradation relieves BRAVO from direct transcriptional repression, maintaining QC quiescence. We further identify that blocking miR160 movement due to DNA damage-induced SSC death and restricted symplastic transport reduces BRAVO and WOX5 expression, leading to QC division to replenish damaged stem cells during root regeneration. Together, our results demonstrate that a transcriptional axis initiated by mobile miR160 regulates the QC and stem cell behavior, advancing our understanding of the communication between stem cells and their surrounding cellular environment.
研究领域:
植物生物学
·
分子遗传学
·
发育生物学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）