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Portable fluorogenic probe for monitoring of volatile amine vapour and food spoilage

Chinese Chemical Letters 2024年第3期35卷 257-261页

作者： Jian-Hao Zhao Wen-Xing Xu Bin Li Wei Xu Wu-Kun Zhang Ming-Shuai Yuan Hui-Zi Li Qing-Guo He Xiang Ma Jian-Gong Cheng Yan-Yan Fu State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of the Chinese Academy of SciencesBeijing 100039China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

There are urgent needs of volatile amine gas sensors with high-performance in food quality control,disease monitoring and environmental pollution.Thin-film fluorescent probe is suitable for amine vapour sensing due to its high sensitivity,high selectivity,and no polluting analyte.Herein,a novel fluorescent probe based on indacenodithiophene structure withπconjugated system was designed and synthesized.The experimental results show that the films prepared by this material exhibit rapid and distinct fluorescence quenching after being exposed to saturated vapours of primary amine,secondary amine and tertiary amine represented by n-propylamine,diethylamine and trimethylamine,respectively.The quenching of fluorescence is 84%,87%and 96%,respectively,within 10 s.The detection mechanism of probe for primary amine is based on specific chemical reaction,while the detection mechanism for secondary amine and tertiary amine is intramolecular charge transfer.Further experiments show that the detection limit of the fluorescent probe for trimethylamine,an important marker of food spoilage,could reach 4.610 ppt.On-site detection based on spoilage of small yellow croaker suggests the material possesses the potential for food freshness detection.This simple fluorogenic probe is an original approach to simplify real-time visual monitoring of volatile amine vapour.

关键词： Fluorescent probe Volatile amine Gas sensing trimethylamine Food spoilage

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trimethylamine N-oxide attenuates high-fat high-cholesterol dietinduced steatohepatitis by reducing hepatic cholesterol overload in rats

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World Journal of Gastroenterology 2019年第20期25卷 2450-2462页

作者： Ze-Hua Zhao Feng-Zhi Xin Da Zhou Ya-Qian Xue Xiao-Lin Liu Rui-Xu Yang Qin Pan Jian-Gao Fan Center for Fatty Liver Department of GastroenterologyXinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China CAS Key Laboratory of Nutrition Metabolism and Food SafetyShanghai Institute of Nutrition and HealthShanghai Institutes for Biological SciencesUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China Shanghai Key Lab of Pediatric Gastroenterology and Nutrition Shanghai 200092China

BACKGROUND trimethylamine N-oxide (TMAO) has been shown to be involved in cardiovascular disease (CVD). However, its role in nonalcoholic steatohepatitis (NASH) is unknown. AIM To determine the effect of TMAO on the progression of NASH. METHODS A rat model was induced by 16-wk high-fat high-cholesterol (HFHC) diet feeding and TMAO was administrated by daily oral gavage for 8 wk. RESULTS Oral TMAO intervention attenuated HFHC diet-induced steatohepatitis in rats. Histological evaluation showed that TMAO treatment significantly alleviated lobular inflammation and hepatocyte ballooning in the livers of rats fed a HFHC diet. Serum levels of alanine aminotransferase and aspartate aminotransferase were also decreased by TMAO treatment. Moreover, hepatic endoplasmic reticulum (ER) stress and cell death were mitigated in HFHC diet-fed TMAOtreated rats. Hepatic and serum levels of cholesterol were both decreased by TMAO treatment in rats fed a HFHC diet. Furthermore, the expression levels of intestinal cholesterol transporters were detected. Interestingly, cholesterol influxrelated Niemann-Pick C1-like 1 was downregulated and cholesterol efflux-related ABCG5/8 were upregulated by TMAO treatment in the small intestine. Gut microbiota analysis showed that TMAO could alter the gut microbial profile and restore the diversity of gut flora. CONCLUSION These data suggest that TMAO may modulate the gut microbiota, inhibit intestinal cholesterol absorption, and ameliorate hepatic ER stress and cell death under cholesterol overload, thereby attenuating HFHC diet-induced steatohepatitis in rats. Further studies are needed to evaluate the influence on CVD and define the safe does of TMAO treatment.

关键词： Gut microbiota trimethylamine N-oxide Nonalcoholic steatohepatitis Endoplasmic reticulum stress Cholesterol

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trimethylamine Adsorption Mechanism on Activated Carbon and Removal in Water and Oyster Proteolytic Solution

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Journal of Ocean University of China 2021年第6期20卷 1578-1586页

作者： CHEN Deke WAN Peng CAI Bingna YE Ziqing CHEN Hua CHEN Xin SUN Huili PAN Jianyu Key Laboratory of Tropical Marine Bio-Resource and Ecology/Guangdong Key Laboratory of Marine Meteria Medica South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Innovation Academy of South China Sea Ecology and Environmental Engineering(ISEE) Chinese Academy of SciencesGuangzhou 510000China School of Environment and Chemical Engineering Foshan UniversityFoshan 528000China University of Chinese Academy of Sciences Beijing 100049China

In this study,seven coal-based activated carbons(ACs)were adopted to remove trimethylamine(TMA)in an aqueous solution as environmentally friendly and harmless adsorbents.The results showed that columnar AC(CAC)had a clear scale and honeycomb structures with few fragments and micropores,contributing to superior TMA removal capacity compared to granular AC(GAC)(71.67%for 6.0 mm CAC and 69.92%for 40–60 mesh GAC).In addition,the process of adsorption was accompanied by desorption,and the recommended absorbed time was 120–180 min.The short time to achieve equilibrium indicated that adsorption was kinetically controlled,and pseudo-second-order kinetics was more appropriate than pseudo-first-order kinetics in explaining the adsorption mechanism in both water and oyster enzymatic hydrolysate.The intraparticle diffusion model presented that the adsorption processes could be divided into three steps for GAC and two steps for CAC.The adsorption processes were consistent with the Freundlich model,indicating the existence of physisorption and chemisorption as multilayer adsorption.The results indicated that AC,especially CAC,has great potential for TMA elimination in aquatic product processing.

关键词： trimethylamine activated carbon adsorption mechanism oyster proteolytic solution

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Contribution of trimethylamine N-oxide on the growth and pressure tolerance of deep-sea bacteria

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Journal of Oceanology and Limnology 2019年第1期37卷 210-222页

作者： YIN Qunjian ZHANG Weijia LI Xuegong ZHOU Lihong QI Xiaoqing ZHANG Chan WU Long-Fei Laboratory of Deep-sea Microbial Cell Biology Institute of Deep-sea Science and Engineering Chinese Academy of Sciences University of Chinese Academy of Sciences International Associated Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms CNRS-Marseille/CAS-Beijing-Qingdao-Sanya CAS Key Laboratory for Experimental Study under Deep-sea Extreme Conditions Institute of Deep-sea Science and Engineering Chinese Academy of Sciences AMU LCB UMR 7283 CNRS-Marseille

trimethylamine N-oxide(TMAO) is widely dispersed in marine environments and plays an important role in the biogeochemical cycle of nitrogen. Diverse marine bacteria utilize TMAO as carbon and nitrogen sources or as electron acceptor in anaerobic respiration. Alteration of respiratory component according to the pressure is a common trait of deep-sea bacteria. Deep-sea bacteria from dif ferent genera harbor high hydrostatic pressure(HHP) inducible TMAO reductases that are assumed to be constitutively expressed in the deep-sea piezosphere and facilitating quick reaction to TMAO released from ?sh which is a potential nutrient for bacterial growth. However, whether deep-sea bacteria universally employ this strategy remains unknown. In this study, 237 bacterial strains affliated to 23 genera of Proteobacteria,Bacteroidetes, Firmicutes and Actinobacteria were isolated from seawater, sediment or amphipods collected at dif ferent depths. The pressure tolerance and the utilization of TMAO were examined in 74 strains. The results demonstrated no apparent correlation between the depth where the bacteria inhabit and their pressure tolerance, regarding to our samples. Several deep-sea strains from the genera of Alteromonas, Halomonas,Marinobacter, Photobacterium, and Vibrio showed capacity of TMAO utilization, but none of the isolated Acinebacter, Bacillus, Brevundimonas, Muricauda, Novosphingobium, Rheinheimera, Sphingobium and Stenotrophomonas did, indicating the utilization of TMAO is a species-speci?c feature. Furthermore, we noticed that the ability of TMAO utilization varied among strains of the same species. TMAO has greater impact on the growth of deep-sea isolates of Vibrio neocaledonicus than shallow-water isolates. Taken together, the results describe for the ?rst time the TMAO utilization in deep-sea bacterial strains, and expand our understanding of the physiological characteristic of marine bacteria.

关键词： marine bacteria trimethylamine N-oxide(TMAO) high hydrostatic pressure(HHP) pressure tolerance phenotype

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Deposition of In2O3 nanofibers on polyimide substrates to construct high-performance and flexible trimethylamine sensor

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Chinese Chemical Letters 2020年第8期31卷 2142-2144页

作者： Yong Li Jiaqing Liu Jingjing Zhang Xiu Liang Xingshuang Zhang Qi Qi National Supercomputer Research Center of Advanced Materials Advanced Materials InstituteQilu University of Technology(Shandong Academy of Sciences)Ji'nan 250014China

Flexible trimethylamine sensor has been realized based on In2 O3 nanofibers via electrospinning and a deposition technique.The web-like In2O3 nanofibers with high length-to-diameter ratios are benefit for gas adsorption and desorption.High trimethylamine sensing properties are observed.The sensors can detect trimethylamine gas down to 1 ppm at 80℃with the response up to 3.8.Additionally,rapid response(6 s)and recovery(10 s)behavior can also be obtained.Good reliability and flexibility are observed in 100 bending/extending cycles.Our results open a new route to construct flexible gas sensors in practice.

关键词： trimethylamine In2O3 Polyimide Flexible gas sensor

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Intestinal Microbiota Metabolism and Atherosclerosis

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Chinese Medical Journal 2015年第20期128卷 2805-2811页

作者： Tian-Xing Liu Hai-Tao Niu Shu-Yang Zhang Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100730 China Institute of Laboratory Animal Sciences Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100021 China

Objective： This review aimed to summarize the relationship between intestinal microbiota metabolism and cardiovascular disease （CVD） and to propose a novel CVD therapeutic target. Data Sources： This study was based on data obtained from PubMed and EMBASE up to Jtme 30, 2015. Articles were selected using the following search terms：＂＇Intestinal microbiota＂, ＂trimethylamine N-oxide （TMAO）＂, ＂trimethylamine （TMA）＂, ＂cardiovascular＂, and ＂atherosclerosis＂. Study Selection： Studies were eligible if they present information on intestinal microbiota metabolism and atherosclerosis. Studies on TMA-containing nutrients were also included. Results： A new CVD risk factor, TMAO, was recently identified. It has been observed that several TMA-containing compounds may be catabolized by specific intestinal microbiota, resulting in TMA release. TMA is subsequently converted to TMAO in the liver. Several preliminary studies have linked TMAO to CVD, particularly atherosclerosis; however, the details of this relationship remain unclear. Conclusions： Intestinal microbiota metabolism is associated with atherosclerosis and may represent a promising therapeutic target with respect to CVD management.

关键词： Atherosclerosis Cardiovascular Intestinal Microbiota Metabolism trimethylamine trimethylamine N-oxide

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Synthesis and NH_(3)/TMA sensing properties of CuFe_(2)O_(4) hollow microspheres at low working temperature

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Rare Metals 2021年第7期40卷 1768-1777页

作者： Kai-Di Wu Jin-Yong Xu Marc Debliquy Chao Zhang College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China Materials Science Department University of MonsMons 7000Belgium

In this work,CuFe_(2)O_(4) hollow microspheres assembled with nanosheets(CuFe_(2)O_(4) HMANs)were synthesized using a solvothermal method followed by an annealing treatment.The effects of annealing temperature on microstructure,chemical composition and gas sensing characteristics of as-prepared samples were investigated.The results showed that annealing treatment played a crucial role in the final products.All samples demonstrated hollow spherical morphology assembled with nanosheets or nanoparticles.The CuFe_(2)O_(4) HMANs annealed at400℃exhibited the best n-type conductometric sensing properties toward low-concentration NH3 at 100℃and49%RH.The sensor response to 10×10^(-6)NH_(3) was 4.0 with a rapid response time of 32 s,and it even showed a response of 1.2 toward 1×10^(-6)NH3 at the same condition,while a response of 3.95 to trimethylamine(TMA).The CuFe_(2)O_(4) HMANs-based NH_(3) sensor also exhibited good selectivity and excellent reproducibility.Therefore,this work provided a novel promised sensing material of low-concentration NH_(3) and TMA for real-time monitoring.

关键词： Copper ferrite Hollow microspheres Gas sensor Ammonia trimethylamine

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Separation of Inorganic Anions Using Methacrylate-Based Monolithic Column Modified with trimethylamine in Ion Chromatography Capillary System

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American Journal of Analytical Chemistry 2013年第9期4卷 451-456页

作者： Fitri Mairizki Athika Rahmah Hilma Radhia Putri Rahmiana Zein Lee Wah Lim Toyohide Takeuchi Edison Munaf Department of Chemistry Faculty of Engineering Gifu University Gifu Japan Department of Chemistry Faculty of Mathematics and Natural Sciences Andalas Universiy Padang Indonesia

Methacrylate-based monolithic column was prepared in fused-silica capillary (80 ′ 0.32 mm i.d.) by in situ polymerizetion reaction using glycidyl methacrylate as monomer;ethylene dimethacrylate as crosslinker;1-propanol, 1,4-butanediol, and water as porogenic solvents. The monolith matrix was modified with trimethylamine to create strong anion exchanger via ring opening reaction of epoxy groups. The morphology of the monolithic column was studied by using Scanning Electron Microscope (SEM). This column had good mechanical stability and permeability. The effects of various mobile phases for separation of inorganic anions were investigated. Iodate, bromate, nitrite, bromide, and nitrate were separated within 11 min using100 mMpotassium chloride as mobile phase and detected at 210 nm. This method showed good precision of retention time, acceptable linearity and good sensitivity. Under the optimum condition, the RSD of the retention time was in the range of 1.09%-1.75% (n = 6). The calibration curve showed linear relationships between the peak area and the concentration. The limits of detection (LOD) and the limits of quantitation (LOQ) were between 0.08-0.18 mM and 0.26-0.61 mM, respectively. This method was applied to the determination of inorganic anions in tap water and ground water samples.

关键词： Methacrylate-Based Monolithic Column trimethylamine Ion Chromatography Capillary System Inorganic Anions Water Sample

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The Transition from the Single Protonation to the Double Protonation: Theoretical Studies on the Clusters [(CH3)3N](H2SO4)(H2O)8-14

The Transition from the Single Protonation to the Double Pro...

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第十三届全国量子化学会议

作者： Zhen-Zhen Xu Hong-Jun Fan State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of Sciences

Atmospheric nucleation is the dominant source of aerosol particles in the global atmosphere and an important player in aerosol climatic effects1.The sulfuric acid is the key atmospheric nucleation precursor and the water is the dominate constituent in nucleation. However, the binary nucleation cannot explain the nucleation rates well, ternary bases like ammonia and amines and organics can enhance the nucleation rate.We have previously studied the [(CH)N]·(HSO)·(HO)n cluster where n=3-710, and found that the proton of HSO was preferred to transfer to the(CH)N to form the ion-pair(CH)NH+ and HSO, and the(CH)NH ions were coordinated at the first hydrated shell of HSOwhen n was 3 to 5 and coordinated at the second or third hydrated shell when n was large than 5.And in this thesis, we were going on to study these ternary clusters for n=8-14. We used a scheme combining MD sampling with the quantum chemistry calculations MP2/6-311++G(d,p)//CAM-B3LYP/6-311G(d,p)to obtain some stable configurations for each cluster size. In the global minima configurations, the protons of HSO in the clusters from n=8-14 were preferred to(CH)N and HO to form tri-ion structures, including(CH)NH, SO, and HO. There appeared a transition from single protonation(n < 8) to double protonation(n ≥ 8), which meant the cluster system was close to the solution state while the number of water molecules reached to 8.

关键词： trimethylamine Sulfuric acid Proton transfer Cluster H-bond

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