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Total 409123 results found since Jan 2013.
A novel electrochemical sensing platform based on double-active-center polyimide covalent organic frameworks for sensitive analysis of levofloxacin
Anal Bioanal Chem. 2023 Sep 21. doi: 10.1007/s00216-023-04955-6. Online ahead of print.ABSTRACTThe development of a simple and sensitive electrochemical sensing platform for levofloxacin (LVF) analysis is of great significance to human health. In this work, a covalent organic framework (TP-COF) was in situ grown on the surface of Sn-MoC nanospheres with nanoflower-like morphology through a one-pot method to obtain the TP-COF@Sn-MoC composite. The prepared composite was used to modify a glassy carbon electrode (GCE) to realize the sensitive detection of levofloxacin. TP-COF was formed by polycondensation of 2,4,6-tris(4-ami...
Source: Analytical and Bioanalytical Chemistry - September 21, 2023 Category: Chemistry Authors: Zongyan Lu Hao Guo Mingyue Wang Zeyun Yang Xiaoqin Wei Yinsheng Liu Yingfei Hui Zhiguo Yu Wu Yang Source Type: research
Bimodal persistent luminescence for autofluorescence-free ratiometric biosensing
This study may open new opportunities for the design of dual-emissive PLNPs with tunable ratios of emission intensity, and it can further promote the applications of optical biosensing in disease diagnosis, food safety, and environmental monitoring.PMID:37733257 | DOI:10.1007/s00216-023-04949-4
Source: Analytical and Bioanalytical Chemistry - September 21, 2023 Category: Chemistry Authors: Wenjing Dai Bing Qi Zhihao Li Jie Wang Source Type: research
Target immobilization on glass microfiber membranes as a label-free strategy for hit identification
Anal Bioanal Chem. 2023 Sep 21. doi: 10.1007/s00216-023-04951-w. Online ahead of print.ABSTRACTThe discovery of novel chemical entities targeting G protein-coupled receptors (GPCRs) is usually guided by their receptor affinity. However, traditional affinity assay methods and hit identification procedures are usually laborious and expensive. In this work, the type-2 vasopressin receptor (V2R) was chosen as a prototypical GPCR. Membrane fragments from cells highly expressing SNAP-V2R were immobilized on the surface of a glass microfiber (GMF) coated with O6-benzylguanine (BG). This was achieved by transferring the benzyl gro...
Source: Analytical and Bioanalytical Chemistry - September 21, 2023 Category: Chemistry Authors: Yinan Wang Yan He Xiaojiao Ye Yixiao Zhang Xiuxiu Huang Hongli Liu Wenqing Dong Dongzhi Yang Dong Guo Source Type: research
Complementarity of plasma and stool for the characterization of children's exposure to halogenated flame retardants: Update on analytical methods and application to a Canadian cohort
Chemosphere. 2023 Sep 19:140222. doi: 10.1016/j.chemosphere.2023.140222. Online ahead of print.ABSTRACTSixteen halogenated flame retardants including Polybrominated diphenyl ethers (PBDEs), Dechlorane-like compounds, and emerging halogenated flame retardants were measured in stool and plasma samples from children aged 8.9-13.8 years old. Samples were obtained from a Canadian cohort investigating the effect of contaminants on children's neurodevelopment in the Estrie region, Québec, Canada. The method for stool analysis developed for this study showed good recovery for all targeted compounds (73%-93%) with associated relat...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Guillaume Martinez Jiping Zhu Larissa Takser Andrea A Baccarelli Jean-Philippe Bellenger Source Type: research
Sustainable remediation of toxic Congo red dye pollution using bio based carbon nanocomposite: Modelling and performance evaluation
Chemosphere. 2023 Sep 19:140206. doi: 10.1016/j.chemosphere.2023.140206. Online ahead of print.ABSTRACTRemediation of synthetic dyes found in aqueous environment poses a serious challenge for treatment due to their resistance to chemical and biological degradation. This research study investigated the application of Chitosan-ZnO-Seaweed bio nanocomposite in the remediation of congo red. The novel bionanocomposite was characterised by FTIR, SEM, TEM, EDS and XRD studies. The FTIR spectra and SEM images indicated the adsorption of congo red onto the synthesized bionanocomposite. The batch wise experimental studies were done ...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Sarojini Gopalakrishnan Pownsamy Kannan Kuppusamy Balasubramani Natarajan Rajamohan Manivasagan Rajasimman Source Type: research
Microbial community and gene dynamics response to high concentrations of gadolinium and sulfamethoxazole in biological nitrogen removal system
Chemosphere. 2023 Sep 19:140218. doi: 10.1016/j.chemosphere.2023.140218. Online ahead of print.ABSTRACTThe impact of high antibiotic and heavy metal pollution levels on biological nitrogen removal in wastewater treatment plants (WWTPs) remains poorly understood, posing a global concern regarding the issue spread of antibiotic resistance induced by these contaminants. Herein, we investigated the effects of gadolinium (Gd) and sulfamethoxazole (SMX), commonly found in medical wastewater, on biological nitrogen removal systems and microbial characteristics, and the fate of antibiotic resistance genes (ARGs), metal resistance ...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Xinrui Yuan Kangping Cui Yihan Chen Yao Zhang Shiyang Wu Xianjin Xie Tong Liu Hongjia Yao Source Type: research
Performance of volatile fatty acids production from food waste at the presence of alkyl ethoxy polyglycosides and sodium dodecyl sulfate
This study investigated the performance of VFAs production from food waste at the presence of alkyl ethoxy polyglycosides (AEG) and sodium dodecyl sulfate (SDS). The highest yield of VFAs was obtained at 0.1 g AEG/g TS (14.53 g COD/L), which increased by 25.80% than the Blank. But inhibited phenomenon was observed at other reactors with relatively low yield and delayed fermentation time. The inhibition of lactate's production and bioconversion delayed the fermentation time, and SDS has changed the acidogenic fermentation type from lactate-butyrate fermentation to acetate fermentation. In addition, more organic matter disso...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Cui Quan Changxiang Chen Xinggang Li Ningbo Gao Source Type: research
The effects of Spinosad on zebrafish larvae and THP-1 cells: Associated with immune cell damage and NF-kappa B signaling pathway activation
This study has drawn attention to Spinosad-induced immunotoxicity.PMID:37734501 | DOI:10.1016/j.chemosphere.2023.140237
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Wei-Guo Wang Shou-Qian Xiong Jin Lu Lian-Hua Zhu Cheng Zhang Jia-Gao Cheng Zhong Li Wen-Ping Xu Li-Ming Tao Yang Zhang Source Type: research
Microplastics in wastewater treatment plants and their contributions to surface water and farmland pollution in China
This study examines the presence of MPs in sewage and sludge in Shenzhen WWTPs and estimates the annual mass loading of MPs from WWTPs to surface water and farmland soil in China. According to our results, for Shenzhen, the annual contribution of MPs from WWTPs (which was obtained by multiplying the annual treated sewage volume by the estimated MP density in the treated sewage) to surface water could be 70.6-302 tons. With a normalized extrapolation model of population density, the contribution of national urban WWTPs to MPs in surface water was estimated to be 734 -3.10 × 103 tons/year, of which 220-950 tons/year entered...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Shu-Yan Ren Qing Sun Shi-Yong Xia De Tong Hong-Gang Ni Source Type: research
Boron contamination and related health risk assessment in the soils collected from olive groves in İzmir province, Türkiye
In this study, it was aimed to determine the B pollution degree of the soils taken from the olive groves of İzmir province, which is approximately 180 km away from the B deposits in the Bigadiç district. In addition, the factors affecting boron adsorption and availability were discussed and the ecological and health risks of boron were evaluated. For this, soil samples were collected at depths of 0-30 cm from 118 olive groves and their B, Al, Fe, pH and organic matter contents were determined. The mean B content (47.08 mg/kg) of the study area was comparable to world-soil average B concentration (42 mg/kg). Also, B had a...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Memet Varol Ai şe Deliboran Halil Aytop Özgür Ateş Source Type: research
Singlet oxygen in the removal of organic pollutants: An updated review on the degradation pathways based on mass spectrometry and DFT calculations
Chemosphere. 2023 Sep 19:140203. doi: 10.1016/j.chemosphere.2023.140203. Online ahead of print.ABSTRACTThe degradation of pollutants by a non-radical pathway involving singlet oxygen (1O2) is highly relevant in advanced oxidation processes. Photosensitizers, modified photocatalysts, and activated persulfates can generate highly selective 1O2 in the medium. The selective reaction of 1O2 with organic pollutants results in the evolution of different intermediate products. While these products can be identified using mass spectrometry (MS) techniques, predicting a proper degradation mechanism in a 1O2-based process is still ch...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Manoj P Rayaroth Usha K Aravind Grzegorz Boczkaj Charuvila T Aravindakumar Source Type: research
Toxicity of bisphenol A (BPA) and its analogues BPF and BPS on the free-floating macrophyte Salvinia biloba
Chemosphere. 2023 Sep 19:140235. doi: 10.1016/j.chemosphere.2023.140235. Online ahead of print.ABSTRACTEvidence linking the toxicity of bisphenol A (BPA) to environmental and public-health issues has led to restrictions on its use. This compound has been gradually replaced with analogues proposed as a safer alternative, normally bisphenol F (BPF) and bisphenol S (BPS), but these substitutes are structurally almost identical to BPA, suggesting they may pose similar risks. The effects of BPA and these analogues were compared for antioxidant activity, lipid peroxidation, free-radical generation, photosynthetic pigments, and c...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Jaqueline da Silva Santos Montcharles da Silva Pontes Matheus Bispo de Souza Simone Yasuda Fernandes Ricardo Antunes de Azevedo Gilberto Jos é de Arruda Etenaldo Felipe Santiago Source Type: research
Applied potential assisted biodegradation of amoxicillin (AMX) using bacterial consortium isolated from a waste dump site
This study aims to explore the potential of using a bio-electrochemical system (BES) to remove Amoxicillin (AMX) from artificially contaminated soil using a microbial consortium and pure culture isolates. Under desired conditions, including an initial AMX concentration of 150 mg/L, 5 mg/L tryptone as the nitrogen source, pH of 7, temperature of 29 °C, an applied potential of 0.8 V, and an inoculum dose of 1% w/v, the BES showed a maximum degradation of 97.9% of AMX with the microbial consortium (HP03, HP09, and HP10). High performance liquid chromatography-mass spectrometry was used to analyse the intermediates formed dur...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Pavithra Muthukumar Sathya Harshavardhan Mohan Jung-Hee Park Kamala-Kannan Seralathan Byung-Taek Oh Source Type: research
Highly Efficient Depolymerization of Waste Polyesters Enabled by Transesterification/Hydrogenation Relay Under Mild Conditions
Angew Chem Int Ed Engl. 2023 Sep 21:e202312564. doi: 10.1002/anie.202312564. Online ahead of print.ABSTRACTThe efficient depolymerization of polyesters under mild conditions remains a significant challenge. Herein, we demonstrate a highly efficient strategy for the degradation of a diverse array of waste polyesters as low to 80 °C, 1 bar H2. The key to the success of this transformation relied on the initial transesterification of macromolecular polyester into more degradable oligomeric fragments in the presence of CH3OH and the subsequent hydrogenation by the use of the rationally designed quinaldine-based Ru complex. Co...
Source: Angewandte Chemie - September 21, 2023 Category: Chemistry Authors: Yue Hu Shiyun Zhang Juanfang Xu Yuan Liu Aiai Yu Jun Qian Yinjun Xie Source Type: research
Reversible Boron-insertion into Aromatic C-C Bonds
Angew Chem Int Ed Engl. 2023 Sep 21:e202312980. doi: 10.1002/anie.202312980. Online ahead of print.ABSTRACTFormation of borabicyclo[3.2.0]heptadiene derivatives was achieved via boron-insertion into aromatic C-C bonds in the photo-promoted skeletal rearrangement reaction of triarylboranes bearing an ortho-phosphino substituent (ambiphilic phosphine-boranes). The borabicyclo[3.2.0]heptadiene derivatives were fully characterized by NMR and X-ray analyses. These dearomatized products were demonstrated to undergo the reverse reaction in the dark at room temperature, realizing photochemical and thermal interconversion between t...
Source: Angewandte Chemie - September 21, 2023 Category: Chemistry Authors: Kaito Kuroki Tatsuyoshi Ito Jun Takaya Source Type: research
