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Study of steam heat transfer enhanced by CO_(2) and chemical agents: In heavy oil production 被引量:1
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作者 Ya-Li Liu Chao Zhang +1 位作者 Song-Yan Li Zhao-Min Li 《Petroleum Science》 SCIE EI CAS CSCD 2023年第2期1030-1043,共14页
Steam flooding with the assistance of carbon dioxide (CO_(2)) and chemicals is an effective approach for enhancing super heavy oil recovery. However, the promotion and application of CO_(2) and chemical agent-assisted... Steam flooding with the assistance of carbon dioxide (CO_(2)) and chemicals is an effective approach for enhancing super heavy oil recovery. However, the promotion and application of CO_(2) and chemical agent-assisted steam flooding technology have been restricted by the current lack of research on the synergistic effect of CO_(2) and chemical agents on enhanced steam flooding heat transfer. The novel experiments on CO_(2)–chemicals cooperate affected steam condensation and seepage were conducted by adding CO_(2) and two chemicals (sodium dodecyl sulfate (SDS) and the betaine temperature-salt resistant foaming agent ZK-05200).According to the experimental findings, a “film” formed on the heat-transfer medium surface following the co-injection of CO_(2) and the chemical to impede the steam heat transfer, reducing the heat transfer efficiency of steam, heat flux and condensation heat transfer coefficient. The steam seepage experiment revealed that the temperature at the back end of the sandpack model was dramatically raised by 3.5–12.8 °C by adding CO_(2) and chemical agents, achieving the goal of driving deep-formation heavy oil. The combined effect of CO_(2) and SDS was the most effective for improving steam heat transfer, the steam heat loss was reduced by 6.2%, the steam condensation cycle was prolonged by 1.3 times, the condensation heat transfer coefficient was decreased by 15.5%, and the heavy oil recovery was enhanced by 9.82%. Theoretical recommendations are offered in this study for improving the CO_(2)–chemical-assisted steam flooding technique. 展开更多
关键词 Steam flooding Heavy oil Carbon dioxide chemical agent Enhanced oil recovery(EOR) Heat transfer
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Comparative Study on the Efficacies of 11 Chemical Agents against Taro Soft Rot Caused by Pectobacterium aroidearum 被引量:2
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作者 Dongkun Wang Xiuting Ji +8 位作者 Huaixu Zhan Chengpeng Zheng Hao Zong Xiaolei Tan Xiuchun Du Weimin Wang Jingjing Wu Fenglong Wang Xiaoqiang Wang 《Plant Diseases and Pests》 CAS 2021年第2期21-23,26,共4页
[Objective]The paper was to screen the effective agents for effectively controlling the occurrence and prevalence of taro soft rot.[Method]The fungicidal effects of 11 fungicides on taro soft rot were determined by in... [Objective]The paper was to screen the effective agents for effectively controlling the occurrence and prevalence of taro soft rot.[Method]The fungicidal effects of 11 fungicides on taro soft rot were determined by inhibition zone method.[Result]0.3%Tetramycin,25%bromothalonil,3%Zhongshengmycin and 30%zinc thiazole had better antifungal effect on Pectobacterium aroidearum at recommended concentration.The indoor toxicity of four fungicides showed that the EC50 of 0.3%tetramycin AS was the smallest of 0.6μg/mL,indicating that tetramycin had the largest toxicity and the best inhibitory effect against P.aroidearum;followed by 25%bromothalonil EC and 3%Zhongshengmycin WP,with the EC_(50) of 2.57 and 97.72μg/mL,respectively;the inhibitory effect of 30%zinc thiazole SC against P.aroidearum was the poorest.[Conclusion]The study provides a reference for screening out new and efficient chemical agents against taro soft rot. 展开更多
关键词 Taro soft rot Pectobacterium aroidearum EFFICACY EC_(50) chemical agents
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Study on scattering properties of tissues with hyperosmotic chemical agents
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作者 ZHOU Fujun 《Journal of Northeast Agricultural University(English Edition)》 CAS 2007年第3期250-255,共6页
Optical properties of biological tissue are variable due to the changes of micro-structures and scattering constituents after hyperosmotic chemical agents permeates into tissue. The changes of optical properties of bi... Optical properties of biological tissue are variable due to the changes of micro-structures and scattering constituents after hyperosmotic chemical agents permeates into tissue. The changes of optical properties of biological tissue are due to the refractive indices matching between the scatterers with high refractive index and the ground substances, which reduce scattering of tissue. The main reasons are that permeated semipermeable chemical agents with higher refractive index than the ground substances of tissue makes the refractive index of ground substances of tissue higher by the enhancement of the permeated concentration. We studied on the collimated transmittance changes of light penetrating biological tissue after the hyperosmotic chemical agents administrates with different concentration. 展开更多
关键词 optical properties osmotic action chemical agents
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Detection and Analysis of Chemical Agents in Sun-proof Products
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作者 Ma Ying Zhao Li +4 位作者 Li Zexiaqiong Nie Peng Liao Haiwei Liu Dan Qiu Hongyan 《China Detergent & Cosmetics》 2020年第4期40-43,共4页
15 chemical sunscreen agents in 220 batches of sun-proof products were tested,and the test results were checked with the product labels and approvals,and the problems found were compared and analyzed.There were some i... 15 chemical sunscreen agents in 220 batches of sun-proof products were tested,and the test results were checked with the product labels and approvals,and the problems found were compared and analyzed.There were some inconsistencies among the actual ingredients,labeling ingredients and approval ingredients in the sun-proof products on the market,and the problem of insufficient input of raw materials was prominent.The supervision of this kind of products should be strengthened so as to reduce the safety risk of consumers using this kind of products. 展开更多
关键词 sun-proof products chemical sunscreen agents DETECTION ANALYSIS
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A prototype portable instrument employing micro-preconcentrator and FBAR sensor for the detection of chemical warfare agents 被引量:1
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作者 Xu Yan Hemi Qu +2 位作者 Ye Chang Wei Pang Xuexin Duan 《Nanotechnology and Precision Engineering》 CAS CSCD 2022年第1期43-48,共6页
The presence of chemical warfare agents(CWAs)in the environment is a serious threat to human safety,but there are many problems with the currently available detection methods for CWAs.For example,gas chromatography–m... The presence of chemical warfare agents(CWAs)in the environment is a serious threat to human safety,but there are many problems with the currently available detection methods for CWAs.For example,gas chromatography–mass spectrometry cannot be used for in-field detection owing to the rather large size of the equipment required,while commercial sensors have the disadvantages of low sensitivity and poor selectivity.Here,we develop a portable gas sensing instrument for CWA detection that consists of a MEMSfabricated micro-preconcentrator(μPC)and a film bulk acoustic resonator(FBAR)gas sensor.The μPC is coated with a nanoporous metal–organic framework material to enrich the target,while the FBAR provides rapid detection without the need for extra carrier gas.Dimethyl methylphosphonate(DMMP),a simulant of the chemical warfare agent sarin,is used to test the performance of the instrument.Experimental results show that the μPC provides effective sample pretreatment,while the FBAR gas sensor has good sensitivity to DMMP vapor.The combination of μPC and FBAR in one instrument gives full play to their respective advantages,reducing the limit of detection of the analyte.Moreover,both the μPC and the FBAR are fabricated using a CMOS-compatible approach,and the prototype instrument is compact in size with high portability and thus has potential for application to in-field detection of CWAs. 展开更多
关键词 Micro-preconcentrator Film bulk acoustic resonator chemical warfare agent Microelectromechanical system
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Multiple chemical warfare agent simulant decontamination by self-driven microplasma 被引量:1
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作者 陈恕彬 王世宇 +1 位作者 朱安娜 王瑞雪 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第11期12-21,共10页
Low-temperature plasma is a green and high-efficiency technology for chemical warfare agent(CWA)decontamination.However,traditional plasma devices suffer from the problems of highpower composition and large power-supp... Low-temperature plasma is a green and high-efficiency technology for chemical warfare agent(CWA)decontamination.However,traditional plasma devices suffer from the problems of highpower composition and large power-supply size,which limit their practical applications.In this paper,a self-driven microplasma decontamination system,induced by a dielectric-dielectric rotary triboelectric nanogenerator(dd-r TENG),was innovatively proposed for the decontamination of CWA simulants.The microplasma was characterized via electrical measurements,optical emission spectra and ozone concentration detection.With an output voltage of-3460 V,the dd-r TENG can successfully excite microplasma in air.Reactive species,such as OH,O(1D),Hαand O3were detected.With input average power of 0.116 W,the decontamination rate of 2-chloroethyl ethyl sulfide reached 100%within 3 min of plasma treatment,while the decontamination rates of malathion and dimethyl methylphosphonate reached(65.92±1.65)%and(60.88±1.92)%after 7 min of plasma treatment,respectively.In addition,the decontamination rates gradually decreased with the increase in the simulant concentrations.Typical products were identified and analyzed.This study demonstrates the broad spectrum and feasibility of the dd-r TENG-microplasma for CWA elimination,which provides significant guidance for their practical applications in the future. 展开更多
关键词 triboelectric nanogenerator MICROPLASMA DECONTAMINATION chemical warfare agents simulants(Some figures may appear in colour only in the online journal)
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Laboratory investigation into the use of soundless chemical demolitions agents for the breakage of hard rock
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作者 Kelly‑Meriam Habib Isaac Vennes Hani Mitri 《International Journal of Coal Science & Technology》 EI CAS CSCD 2022年第5期71-80,共10页
The method of drilling and blasting with explosives is widely used in rock fragmentation applications in the mining industry for mine development and ore production.However,the use of explosives is associated with rig... The method of drilling and blasting with explosives is widely used in rock fragmentation applications in the mining industry for mine development and ore production.However,the use of explosives is associated with rigorous safety and environmental constraints as blasting creates toxic fumes,ground vibrations,and dust.This study is focused on the use of Soundless Chemical Demolition Agents(SCDA)as a more environmentally friendly method for rock breakage and a potential replacement of explosives.In this paper,the results of a series of experimental tests are reported to identify the efect of SCDA on hard rock breakage under no load and under uniaxial loading conditions.Stanstead granite prismatic specimens of 152.4 mm(6″)×152.4–203.2 mm(6–8″)×406.4 mm(16″)are used to test the infuence of borehole size on the time to fracturing with SCDA borehole size of 25.4 mm(1″),31.75 mm(1.25″)and 38.1 mm(1.5″).It is shown that the fracturing time decreases with increasing borehole size.It is also shown that specimens subjected to uniaxial compression of 5 MPa fracture as early as 7 h after SCDA mixing.A borehole spacing to borehole diameter ratio of 12.8 to 14.6 is suggested for practical applications. 展开更多
关键词 Explosive-free Hard rock fragmentation Soundless chemical demolition agents Uniaxial loading
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Surface Decontamination of Chemical Agent Surrogates Using an Atmospheric Pressure Air Flow Plasma Jet 被引量:2
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作者 李战国 李颖 +1 位作者 曹鹏 赵红杰 《Plasma Science and Technology》 SCIE EI CAS CSCD 2013年第7期696-701,共6页
An atmospheric pressure dielectric barrier discharge (DBD) plasma jet generator using air flow as the feedstock gas was applied to decontaminate the chemical agent surrogates on the surface of aluminum, stainless st... An atmospheric pressure dielectric barrier discharge (DBD) plasma jet generator using air flow as the feedstock gas was applied to decontaminate the chemical agent surrogates on the surface of aluminum, stainless steel or iron plate painted with alkyd or PVC. The experi- mental results of material decontamination show that the residual chemical agent on the material is lower than the permissible value of the National Military Standard of China. In order to test the corrosion effect of the plasma jet on different material surfaces in the decontamination pro-cess, corrosion tests for the materials of polymethyl methacrylate, neoprene, polyvinyl chloride (PVC), polyethylene (PE), phenolic resin, iron plate painted with alkyd, stainless steel, aluminum, etc. were carried out, and relevant parameters were examined, including etiolation index, chroma- tism, loss of gloss, corrosion form, etc. The results show that the plasma jet is slightly corrosive for part of the materials, but their performances are not affected. A portable calculator, computer display, mainboard, circuit board of radiogram, and a hygrometer could work normally after being treated by the plasma jet. 展开更多
关键词 surface decontamination chemical agents atmospheric pressure plasma jet dielectric barrier discharge (DBD) air flow dischargeDAF'~. co ~
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Role of flexible sensors for the electrochemical detection of organophosphate-based chemical warfare agents
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作者 Aman Dubey Aamir Ahmed +3 位作者 Rakesh Singh Anoop Singh Ashok K.Sundramoorthy Sandeep Arya 《International Journal of Smart and Nano Materials》 SCIE EI 2024年第3期502-533,共32页
This review article comprehensively explores the electrochemi-cal detection of organophosphate-based agents,including war-fare agents,pesticides,and simulants.It provides an in-depth analysis of their molecular struct... This review article comprehensively explores the electrochemi-cal detection of organophosphate-based agents,including war-fare agents,pesticides,and simulants.It provides an in-depth analysis of their molecular structures,emphasizing the inherent toxicity and environmental risks posed by these compounds.The review highlights the significant role of flexible sensors in facilitating the electrochemical detection of organophosphate-based agents,offering insights into their design,development,and application in detection methodologies.Additionally,the article critically evaluates the challenges encountered in this field,such as sensor sensitivity and sample complexity,and discusses potential solutions to address these challenges.Furthermore,it outlines the future scope and opportunities for advancement in electrochemical detection technologies,includ-ing the integration of novel materials and the exploration of innovative detection strategies.By synthesizing current research findings and identifying future research directions,this review contributes to the ongoing discourse on the detection and mitigation of organophosphate-based agents’risks to human health and the environment. 展开更多
关键词 chemical warfare agents electrochemical detection flexible nanosensors organophosphates PESTICIDES
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Effect of Shrinkage Reducing Agent and Steel Fiber on the Fluidity and Cracking Performance of Ultra-High Performance Concrete
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作者 Yong Wan Li Li +4 位作者 Jiaxin Zou Hucheng Xiao Mengdi Zhu Ying Su Jin Yang 《Fluid Dynamics & Materials Processing》 EI 2024年第9期1941-1956,共16页
Due to the low water-cement ratio of ultra-high-performance concrete(UHPC),fluidity and shrinkage cracking are key aspects determining the performance and durability of this type of concrete.In this study,the effects ... Due to the low water-cement ratio of ultra-high-performance concrete(UHPC),fluidity and shrinkage cracking are key aspects determining the performance and durability of this type of concrete.In this study,the effects of different types of cementitious materials,chemical shrinkage-reducing agents(SRA)and steel fiber(SF)were assessed.Compared with M2-UHPC and M3-UHPC,M1-UHPC was found to have better fluidity and shrinkage cracking performance.Moreover,different SRA incorporation methods,dosage and different SF types and aspect ratios were implemented.The incorporation of SRA and SF led to a decrease in the fluidity of UHPC.SRA internal content of 1%(NSRA-1%),SRA external content of 1%(WSRA-1%),STS-0.22 and STE-0.7 decreased the fluidity of UHPC by 3.3%,8.3%,9.2%and 25%,respectively.However,SRA and SF improved the UHPC shrinkage cracking performance.NSRA-1%and STE-0.7 reduced the shrinkage value of UHPC by 40%and 60%,respectively,and increased the crack resistance by 338%and 175%,respectively.In addition,the addition of SF was observed to make the microstructure of UHPC more compact,and the compressive strength and flexural strength of 28 d were increased by 26.9%and 19.9%,respectively. 展开更多
关键词 Ultra-high performance concrete chemical shrinkage reducing agent steel fiber shrinkage cracking repair and reinforcement
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Programmed cell death, antioxidant response and oxidative stress in wheat f lag leaves induced by chemical hybridization agent SQ-1 被引量:9
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作者 WANG Shu-ping ZHANG Gai-sheng +7 位作者 SONG Qi-lu ZHANG Ying-xin LI Ying GUO Jia-lin CHEN Zheng NIU Na MA Shou-cai WANG Jun-wei 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2016年第1期76-86,共11页
Male sterility induced by a chemical hybridization agent (CHA) is an important tool for utilizing crop heterosis. Leaves, especially the flag leaves, as CHA initial recipients play a decisive role in inducing male s... Male sterility induced by a chemical hybridization agent (CHA) is an important tool for utilizing crop heterosis. Leaves, especially the flag leaves, as CHA initial recipients play a decisive role in inducing male sterility. To investigate effects of different treatment times of CHA-SQ-1 used, morphological, biochemical and physiological responses of wheat flag leaves were detected in thistudy. CHA induced programmed cell death (PCD) as shown in terminal deoxynucleotidyl transferase-mediated dUTP nick end-labelling (TUNEL) and DNA laddering analysis. In the early phase, CHA-SQ-1 trig- gered organelle changes arid PCD in wheat leaves accompanied by excess production of reactive oxygen species (O2- and H202) and down-regulation of the activities of superoxide dismutase (SOD), catalase (CAT) and guaiacol peroxidase (POD). Meanwhile, leaf cell DNAs showed ladder-like patterns on agarose gel, indicating that CHA-SQ-1 led to the activation of the responsible endonuclease. The oxidative stress assays showed that lipid peroxidation was strongly activated and photosynthesis was obviously inhibited in SQ-l-induced leaves. However, CHA contents in wheat leaves gradually reduced along with the time CHA-SQ-1 applied. Young flags returned to an oxidative/antioxidative balance and ultimately developed into mature green leaves. These results provide explanation of the relations between PCD and anther abortion and practical application of CHA for hybrid breeding. 展开更多
关键词 wheat flag leaf chemical hybridization agent SQ-1 programmed cell death antioxidant response oxidative stress
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Decomposition kinetics of dimethyl methylphospate(chemical agent simulant) by supercritical water oxidation 被引量:2
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作者 Bambang VERIANSYAH Jae-Duck KIM Youn-Woo LEE 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第1期13-16,共4页
Supercritical water oxidation (SCWO) has been drawing much attention due to effectively destroy a large variety of high-risk wastes resulting from munitions demilitarization and complex industrial chemical. An impor... Supercritical water oxidation (SCWO) has been drawing much attention due to effectively destroy a large variety of high-risk wastes resulting from munitions demilitarization and complex industrial chemical. An important design consideration in the development of supercritical water oxidation is the information of decomposition rate. In this paper, the decomposition rate of dimethyl methylphosphonate(DMMP), which is similar to the nerve agent VX and GB(Sarin) in its structure, was investigated under SCWO conditions. The experiments were performed in an isothermal tubular reactor with a H2O2 as an oxidant. The reaction temperatures were ranged from 398 to 633℃ at a fixed pressure of 24 MPa. The conversion of DMMP was monitored by analyzing total organic carbon (TOC) on the liquid effluent samples. It is found that the oxidative decomposition of DMMP proceeded rapidly and a high TOC decomposition up to 99.99% was obtained within 11 s at 555℃. On the basis of data derived from experiments, a global kinetic equation for the decomposition of DMMP was developed. The model predictions agreed well with the experimental data. 展开更多
关键词 supercritical water oxidation kinetics chemical agent DMMP
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Protection of armoured vehicles against chemical, biological and radiological contamination 被引量:1
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作者 Adam Wisniewski Jacek Pirszel 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2021年第2期384-392,共9页
The article presents problems related to mechanical protection of vehicles with different add-on armours against chemical,biological and radiological contamination.This applies to vehicles with additional passive,reac... The article presents problems related to mechanical protection of vehicles with different add-on armours against chemical,biological and radiological contamination.This applies to vehicles with additional passive,reactive and hybrid protection in the form of cassettes against piercing with anti-tank projectiles,piercing with their kinetic energy of impact,and as a result of chemical energy of shaped charges as well as explosively formed projectiles.It has been shown how increased ballistic protection of these vehicles at the same time reduces their decontaminability in various places of the vehicle due to the increased additional surface of the vehicle with cassettes.Prevention of contamination of these cassettes has been presented as a way of reducing hard to reach surface for decontamination and a method of insulating construction elements(stands),fixing these cassettes to the vehicle,from the environment to prevent contact with contaminated liquids and dusts.The selection of appropriate materials is shown,which may affect the improvement of the decontamination efficiency of the vehicle with such cassettes.This applies to the use of materials with low absorption of chemical warfare agents,which prevent the accumulation of large amounts of these agents on contaminated surfaces and improve the effectiveness of decontamination.It also shows how to ensure better access of the disinfectant to as much of the vehicle surface as possible,covered with cassettes that have been contaminated.It shows how a vehicle,in particular with such cassettes,can provide protection against radar detection when Radar Absorbent Material is used on vehicle cassettes. 展开更多
关键词 Protection of ERA CBR defence chemical warfare agents Vehicle decontamination Radar absorbent material Additive manufacturing
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Bacterial microcompartment-mimicking Pickering emulsion droplets for detoxification of chemical threats under sweet conditions
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作者 Xiao Xu Wenqi Xie +14 位作者 Ting Wu Chen Chen Xiaoning Chen Yuheng Yang Hao Lian Hao Chen Xiaofeng Cheng Zhitong Chen Guojun Chen Chaoqun Liu Lanlan Chen Yu He Zhaowei Chen Bernard P.Binks Huanghao Yang 《Science China Chemistry》 SCIE EI CAS CSCD 2024年第9期3039-3049,共11页
Chemical warfare agents represent a severe threat to mankind and their efficient decontamination is a global necessity.However,traditional disposal strategies have limitations,including high energy consumption,use of ... Chemical warfare agents represent a severe threat to mankind and their efficient decontamination is a global necessity.However,traditional disposal strategies have limitations,including high energy consumption,use of aggressive reagents and generation of toxic byproducts.Here,inspired by the compartmentalized architecture and detoxification mechanism of bacterial microcompartments,we constructed oil-in-water Pickering emulsion droplets stabilized by hydrogen-bonded organic framework immobilized cascade enzymes for decontaminating mustard gas simulant(2-chloroethyl ethyl sulfide,CEES)under sweet conditions.Two exemplified droplet systems were developed with two-enzyme(glucose oxidase/chloroperoxidase)and threeenzyme(invertase/glucose oxidase/chloroperoxidase)cascades,both achieving over 6-fold enhancement in decontamination efficiency compared with free enzymes and>99% selectivity towards non-toxic sulfoxide.We found that the favored mass transfer of sugars and CEES from their respective phases to approach the cascade enzymes located at the droplet surface and the facilitated substrate channeling between proximally immobilized enzymes were key factors in augmenting the decontamination efficacy.More importantly,the robustness of immobilized enzymes enabled easy reproduction of both the droplet formation and detoxification performance over 10 cycles,following long-term storage and in far-field locations. 展开更多
关键词 Pickering emulsion biomimetics chemical warfare agent bacterial microcompartment BIOCATALYSIS
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Effect of Different Treatment on Seed Germination of Echinochloa crus-galli 被引量:2
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作者 周静 孟桂元 +1 位作者 金晨钟 竺锡武 《Agricultural Science & Technology》 CAS 2016年第10期2228-2231,共4页
The effect of different treatment on seed germination of Echinochloa crusgalli was investigated in this study. The results showed that GA3, concentrated sulfuric acid, KNO3, NaOH and temperature treatments all could p... The effect of different treatment on seed germination of Echinochloa crusgalli was investigated in this study. The results showed that GA3, concentrated sulfuric acid, KNO3, NaOH and temperature treatments all could promote the germination of E. crus-galli seeds, but there were great differences in the promoting effect. Seed soaking with 1 000-1 500 mg/L of GA3 for 24 h and seed soaking with concentrated sulfuric acid for 15-20 min all maintained the germination rate of E. crusgalli seeds higher than 70.0%; 1.5% NaOH made the germination rate of E. crusgalli seeds up to 93.7%, but higher-concentration NaOH significantly reduced the germination rate of E. crus-galli seeds; KNO3 treatment showed certain promoting effect on germination of E. crus-galli seeds, but the effect was not ideal, i.e., the germination rate was lower than 35.5%; 20-25 ℃ temperature treatment could effectively promote the germination of E. crus-galli seeds, and the germination rate ranged from 68.2% to 75.8%. 展开更多
关键词 Echinochloa crus-galli Seed germination chemical agent GA3 TEMPERATURE
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Hepatocellular carcinoma and the risk of occupational exposure 被引量:5
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作者 Venerando Rapisarda Carla Loreto +14 位作者 Michele Malaguarnera Annalisa Ardiri Maria Proiti Giuseppe Rigano Evelise Frazzetto Maria Irene Ruggeri Giulia Malaguarnera Nicoletta Bertino Mariano Malaguarnera Vito Emanuele Catania Isidoro Di Carlo Adriana Toro Emanuele Bertino Dario Mangano Gaetano Bertino 《World Journal of Hepatology》 CAS 2016年第13期573-590,共18页
Hepatocellular carcinoma(HCC)is the most common type of liver cancer.The main risk factors for HCC are alcoholism,hepatitis B virus,hepatitis C virus,nonalcoholic steatohepatitis,obesity,type 2 diabetes,cirrhosis,afla... Hepatocellular carcinoma(HCC)is the most common type of liver cancer.The main risk factors for HCC are alcoholism,hepatitis B virus,hepatitis C virus,nonalcoholic steatohepatitis,obesity,type 2 diabetes,cirrhosis,aflatoxin,hemochromatosis,Wilson’s disease and hemophilia.Occupational exposure to chemicals is another risk factor for HCC.Often the relationship between occupational risk and HCC is unclear and the reports are fragmented and inconsistent.This review aims to summarize the current knowledge regarding the association of infective and non-infective occupational risk exposure and HCC in order to encourage further research and draw attention to this global occupational public health problem. 展开更多
关键词 Hepatocellular carcinoma Autophagy Epigenetic events Hepatitis B virus Hepatitis C virus Occupational exposure chemical agents MITOPHAGY ARSENIC Cadmium
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Field-deployable rapid multiple biosensing system for detection of chemical and biological warfare agents 被引量:1
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作者 Masato Saito Natsuko Uchida +10 位作者 Shunsuke Furutani Mizuho Murahashi Wilfred Espulgar Naoki Nagatani Hidenori Nagai Yuki Inoue Tomohiko Ikeuchi Satoshi Kondo Hirotaka Uzawa Yasuo Seto Eiichi Tamiya 《Microsystems & Nanoengineering》 EI CSCD 2018年第1期498-508,共11页
The threat of biological and chemical terror acts remains a growing worldwide concern.There is therefore a need to develop appropriate technology for the detection of chemical and biological warfare agents,with early ... The threat of biological and chemical terror acts remains a growing worldwide concern.There is therefore a need to develop appropriate technology for the detection of chemical and biological warfare agents,with early identification intended for use by first responders.Here,we disclose the developed autonomous air sampling and detection system for evaluation of the presence of chemical and biological warfare agents that can be harmful to the population.The current device utilizes the designed mist generator-assisted air collection system(338 l min^(−1))and biosensing chip technologies,such as electrochemical measurement,Au nanoparticle-based localized surface plasmon resonance,and rapid microfluidic chip PCR for detection of minute concentrations lower than the mean lethal dose(LD_(50))of nerve gases(sarin and VX),toxic proteins(BTX/A/Hc and ricin),and pathogens(anthrax simulant).An operation time of only 5–15 min is needed for the collection and detection;sample preparation is already integrated into the system without the need for direct human intervention.In addition to the system’s sensitivity and ease of use,its portability makes it highly beneficial for first responders,which could aid in immediate risk assessment and mitigation of on-site events. 展开更多
关键词 biological and chemical agents BIOSENSING electrochemical detection LSPR PCR rapid detection
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Portable System for CWA Detection Using Micro Array Gas Sensor 被引量:4
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作者 J.H.Kwak Y.T.Lim +6 位作者 G.H.Kim N.J.Choi H.D.Park G.H.Rue J.S.Huh J.C.Kim D.D.Lee 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2006年第A03期124-128,共5页
Biochemistry weapon is raising new tools of war and terror.This research is an experiment about portable system for CWAs (chemical warfare agents) detection using micro array gas system.CWAs were divided into four typ... Biochemistry weapon is raising new tools of war and terror.This research is an experiment about portable system for CWAs (chemical warfare agents) detection using micro array gas system.CWAs were divided into four types such as blood, nerve,vesicant,and choking agent.To detect various CWAs,semiconductor thick film sensor array based on tin oxide was fabricated and their gas responses were examined.Operating temperature was range of 250℃to 350℃and gas concentration was range of 0.1μg/g to 10μg/g.Sensor array was measured as operating temperatures,concentrations for four simulant agents of CWAs.Extracted parameters from results were carried out classification among CWAs through the principal component analysis (PCA).Also,classification of gases is studied using adaptive resonance theory (ART) that is one of neural network algorithm.Results displayed using PDA system. 展开更多
关键词 SNO2 chemical warfare agents(CWAs) portable system ART ARRAY PCA
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Screening and Analysis of Proteins Interacting with TaPDK from Physiological Male Sterility Induced by CHA in Wheat 被引量:4
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作者 ZHANG Long-yu ZHANG Gai-sheng +1 位作者 ZHAO Xin-liang YANG Shu-ling 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2013年第6期941-950,共10页
To further research the regulatory network of pyruvate dehydrogenase kinase (designated as TaPDK) in physiological male-sterility (PHYMS) of wheat induced by chemical hybridizing agent (CHA) SQ-1, an anther cDNA... To further research the regulatory network of pyruvate dehydrogenase kinase (designated as TaPDK) in physiological male-sterility (PHYMS) of wheat induced by chemical hybridizing agent (CHA) SQ-1, an anther cDNA library was constructed, and the proteins interacting with TaPDK were screened via yeast two-hybrid technique. Subsequently, a few candidate proteins in nucleotide expression levels were detected by real-time quantitative PCR. Yeast-two hybrid screening was performed by mating yeast strain Y2HGold containing BD-TaPDK bait plasmid with yeast strain Y187 including anther cDNA library plasmid. Diploid yeast cells were plated on synthetic dropout nutrient medium (SD/-Ade/-His/-Leu/-Trp) (QDO), and further were incubated on QDO medium containing AbA and X-α-Gal. The interactions between TaPDK and the proteins obtained from positive colonies were further confirmed by co-transformation validation. After plasmids DNA were extracted from blue colonies and sequenced, the sequences results were analyzed by bioinformatic methods. Finally, 24 colonies were obtained, including eight genes, namely non-specific lipid-transfer protein precursor (TanLTP), polyubiquitin (TaPUbi), glyceraldehyde-3-phosphate dehydrogenase, proliferating cell nuclear antigen (TaPCNA), CBS domain containing protein (TaCBS), actin, guanine nucleotide-binding protein beta subunit, chalcone synthase, and three new genes with unknown function. The results of quantitative RT-PCR showed that the expression levels of TanLTP, TaPUbi, and TaPCNA were obviously up-regulated in PHYMS anther, and TaCBS expression was only increased at the tricellular stage in PHYMS anther compared with in fertile lines. Whereas, the expression of TaPDK was obviously down-regulated in PHYMS lines. Collectively, these datas indicated that the majority of candidate proteins might be related to pollen abortion in PHYMS lines, which further suggested that TaPDK plays multiple roles in pollen development, besides participating in regulating pyruvate dehydrogenase complex activity. 展开更多
关键词 wheat (Triticum aestivum L.) chemical hybridizing agent pyruvate dehydrogenase kinase yeast two-hybrid pollen abortion
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Wearable membranes from zirconium-oxo clusters cross-linked polymer networks for ultrafast chemical warfare agents decontamination 被引量:1
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作者 Litao Ma Jiamin Xie +6 位作者 Xiaoshan Yan Zhiwei Fan Heguo Li Lin Lu Likun Chen Yi Xin Panchao Yin 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第6期3241-3244,共4页
The urgent need for immediate personal protection against chemical warfare agents(CWAs)spurs the requirement on robust and highly efficient catalytic systems that can be conveniently integrated to wearable devices.Her... The urgent need for immediate personal protection against chemical warfare agents(CWAs)spurs the requirement on robust and highly efficient catalytic systems that can be conveniently integrated to wearable devices.Herein,as a new concept for CWA decontamination catalyst design,sub-nanoscale,catalytically active zirconium-oxo molecular clusters are covalently integrated in flexible polymer network as crosslinkers for the full exposure of catalytic sites as well as robust framework structures.The obtained membrane catalysts exhibit high swelling ratio with aqueous content as 84 wt%and therefore,demonstrate quasi-homogeneous catalytic activity toward the rapid hydrolysis of both CWA,soman(GD)(t_(1/2)=5.0 min)and CWA simulant,methyl paraoxon(DMNP)(t_(1/2)=8.9 min).Meanwhile,due to the covalent nature of cross-linkages and the high flexibility of polymer strands,the membranes possess promising mechanical strength and toughness that can stand the impact of high gas pressures and show high permeation for both CO_(2)and O_(2),enabling their extended applications in the field of collective/personal protective materials with body comfort. 展开更多
关键词 Molecular clusters chemical warfare agents Catalysis Polymer nanocomposites Wearable devices
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