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What kind of optical model potentials should be used for deuteron stripping reactions?

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 64-70页

作者： XiaoYan Yun DanYang Pang yiping xu Zhi Zhang RuiRui xu ZhongYu Ma CenXi Yuan Yuan51School of Physics Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China China Institute of Atomic Energy Beijing 102413China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

This paper presents the results of a study that compares CTOM, a microscopic optical model potential(OMP), which is an optical model co-created by the China Nuclear Data Center & Tuebingen University, to CH89, which is a typical phenomenological *** respective OMPs were tested by applying them to the modelling of nucleon elastic scattering and(d,p) transfer reactions involving14C,36S, and58Ni targets at both low and relatively high energies. The results demonstrated that although both potentials successfully accounted for the angular distributions of both the elastic scattering and transfer cross sections, the absolute values of the transfer cross sections calculated using CTOM were approximately 25% larger than those calculated using CH89. This increased transfer cross sections allowed CTOM to produce single particle strength reduction factors for the three reactions that were consistent with those extracted from(e,e′p) reactions as well as with more recent(p,2p) and(p,pn) reactions. Notch tests suggested that nucleon elastic scattering and transfer reactions are sensitive to different regions of the OMP;accordingly,phenomenological OMPs, which are constrained only by elastic scattering cross sections, may not be sufficient for nucleon transfer reactions. Therefore, we suggest that microscopic OMPs, which reflect more theoretical considerations, should be preferred over phenomenological ones in calculations of direct nuclear reactions.

关键词： optical model potentials elastic scattering transfer reactions spectroscopic factors

Comparison of different triolein-based composite semipermeable membranes for passive sampling of organochlorine pesticides

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Chinese Science Bulletin 2012年第15期57卷 1788-1795页

作者： TANG JianFeng xu yiping MA Mei WANG ZiJian State Key Laboratory of Environmental Aquatic Chemistry Research Center Jor Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Passive sampling methods have been widely used for more than 20 years because they can provide information on time-weighted average concentrations(CTWA) of hydrophobic organic contaminants in *** factors affect the efficiency and applicability of a passive sampling *** others,selection of the sampler design and choice of the supporting membrane material are important factors that determine the performance of passive *** this work,the influences of some critical properties of membranes,such as membrane density,hydrophilicity of the membrane surface,and chemical and mechanical resistances,on the uptake of organic chlorinated pesticides(OCPs) were *** membrane materials,namely cellulose acetate(CA),cellulose acetate butyrate(CAB),a cellulose acetate-cellulose triacetate blend(CA-CTA),and cellulose triacetate(CTA),and their triolein-embedded samplers were selected for the *** four membranes are all hydrophilic;CAB has the highest contact angle and CA has the *** is chemically and mechanically resistant,and has better tensile strength than the other membranes *** does not have good chemical resistance and dissolves in hexane/dichloromethane *** and CTA alone showed lower uptake rates for the selected OCPs than with triolein-embedded passive samplers,indicating that triolein increased the accumulation ***-embedded CA(TECAM),CA-CTA(TECA-CTA),CTA(TECTA),and CAB(TECAB) as passive samplers showed similar uptake patterns;TECTA showed the highest uptake rates and TECAB showed the poorest *** summary,TECTA gave the best performance among all the tested composite semipermeable membranes.

关键词：三油酸甘油酯被动采样器有机氯农药复合材料半透膜疏水性有机污染物三醋酸纤维素酯基

Occurrence and removal of organic micropollutants in the treatment of landfill leachate by combined anaerobic-membrane bioreactor technology

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Journal of Environmental Sciences 2008年第11期20卷 1281-1287页

作者： xu yiping ZHOU Yiqi WANG Donghong CHEN Shaohua LIU Junxin WANG Zijian State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Organic micropollutants,with high toxicity and environmental concern,are present in the landfill leachate at much lower levels than total organic constituents (chemical oxygen demand (COD),biochemical oxygen demand (BOD),or total organic carbon (TOC)),and few has been known for their behaviors in different treatment *** this study,occurrence and removal of 17 organochlorine pesticides (OCPs),16 polycyclic aromatic hydrocarbons (PAHs),and technical 4-nonylphenol (4-NP) in landfill leachate in a comb...

关键词： anaerobic landfill leachate membrane bioreactor organic micropollutant

Susceptibility of male and female Japanese medaka （Oryzias latipes） to 2,4,6-trichlorophenol-induced micronuclei in peripheral erythrocytes

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Frontiers of Environmental Science & Engineering 2013年第1期7卷 77-84页

作者： Nannan LIU Mei MA yiping xu Jinmiao ZHA Kaifeng RAO Zijian WANG State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

2,4,6-trichlorophenol (2,4,6-TCP) is a widespread probable human carcinogen and has been proven to have genotoxicity in in vitro assays. However, little genotoxicity information and no micronuclei induction data for 2,4,6-TCP is available from in vivo tests, especially for sex-specific differences. Following a preliminary test, a piscine peripheral erythrocyte micronucleus assay was conducted on medaka (Oryzias latipes) after a 28-day exposure to 2,4,6-TCP. In the present study, the mean micronuclei (MNC) frequencies of all of the groups increased in a dose-dependent manner, which indicated the potential genotoxicity of 2,4,6-TCP. Moreover, males were found to be more susceptible compared with females after a 28-day exposure to 2,4,6-TCP in all of the dosed groups above 10 μg·L?1. This is the first report on the potential of micronuclei induction and a sex-susceptible effect in the peripheral erythrocytes of mature fish after 2,4,6-TCP in vivo exposure.

关键词： 2 4 6-trichlorophenol genotoxicity Japanese medaka piscine micronucleus test in peripheral erythrocytes gender difference

Multi-frequency switch and excellent slow light based on tunable triple plasmon-induced transparency in bilayer graphene metamaterial

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Communications in Theoretical Physics 2022年第11期74卷 170-179页

作者： Xianwen Zhou yiping xu Yuhui Li Shubo Cheng Zao Yi Guohui Xiao Ziyi Wang Zhanyu Chen School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China Joint Laboratory for Extreme Conditions Matter Properties Southwest University of Science and TechnologyMianyang 621010China Jiangxi Province Key Laboratory of Optoelectronics and Communications Jiangxi Science and Technology Normal UniversityNanchang 330038China

We propose a novel bilayer graphene terahertz metamaterial composed of double graphene ribbons and double graphene rings to excite a dynamically adjustable triple plasma-induced transparency(PIT)*** coupled mode theory(CMT)is used to explain the PIT phenomenon,and the results of the CMT and the finite-difference time-domain simulation show high matching *** adjusting the Fermi levels of graphene,we have realized a pentafrequency asynchronous optical *** performance of this switch,which is mainly manifested in the maximum modulation depth(MD=99.97%)and the minimum insertion loss(IL=0.33 dB),is *** addition,we have studied the slow-light effect of this triple-PIT and found that when the Fermi level of graphene reaches 1.2 eV,the time delay can reach ***,this metamaterial provides a foundation for the research of multi-frequency optical switches and excellent slow-light devices in the terahertz band.

关键词： plasma-induced transparency coupled mode theory optical switch slow-light effect

Small-molecule anti-COVID-19 drugs and a focus on China's homegrown mindeudesivir(WV116)

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Frontiers of Medicine 2023年第6期17卷 1068-1079页

作者： Qiuyu Cao Yi Ding Yu xu Mian Li Ruizhi Zheng Zhujun Cao Weiqing Wang Yufang Bi Guang Ning yiping xu Ren Zhao Department of Endocrine and Metabolic Diseases Shanghai Institute of Endocrine and Metabolic DiseasesRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Shanghai National Clinical Research Center for Metabolic Diseases State Key Laboratory of Medical GenomicsKey Laboratory for Endocrine and Metabolic Diseases of the National Health CommissionShanghai National Center for Translational MedicineRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Department of Infectious Disease Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Clinical Trials Center Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Department of General Surgery Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China

The coronavirus disease 2019(COVID-19)pandemic has stimulated tremendous efforts to develop therapeutic agents that target severe acute respiratory syndrome coronavirus 2 to control viral *** far,a few small-molecule antiviral drugs,including nirmatrelvir-ritonavir(Paxlovid),remdesivir,and molnupiravir have been marketed for the treatment of ***-ritonavir has been recommended by the World Health Organization as an early treatment for outpatients with mild-to-moderate ***,the existing treatment options have limitations,and effective treatment strategies that are cost-effective and convenient for tackling COVID-19 are still *** date,four domestically developed oral anti-COVID-19 drugs have been granted conditional market approval in *** drugs include azvudine,simnotrelvir-ritonavir(Xiannuoxin),leritrelvir,and mindeudesivir(VV11).Preclinical and clinical studies have explored the efficacy and tolerability of mindeudesivir and supported its early use in mild-to-moderate COVID-19 cases at high risk for *** this review,we discuss the most recent findings regarding the pharmacological mechanism and therapeutic effects focusing on mindeudesivir and other small-molecule antiviral agents for *** findings will expand our understanding and highlight the potential widespread application of China's homegrown anti-COVID-19 drugs.

关键词： COVID-19 antiviral drugs mindeudesivir

High-sensitive refractive index sensing and excellent slow light based on tunable triple plasmon-induced transparency in monolayer graphene based metamaterial

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Communications in Theoretical Physics 2023年第1期75卷 120-129页

A patterned monolayer graphene metamaterial structure consisting of six graphene blocks and two graphene strips is proposed to generate triple plasmon-induced transparency(PIT).TriplePIT can be effectively modulated by Fermi levels of *** theoretically calculated results by coupled mode theory show a high matching degree with the numerically simulated results by finite-difference ***,the high-sensitive refractive index sensing and excellent slow-light performance can be realized in the proposed graphene metamaterial *** sensitivity(S)and figure of merit can reach up to 5.7115 THz RIU^(-1)and 116.32,***,the maximum group refractive index is ***,these results may provide a new idea for designing graphene-based sensors and slow light devices.

关键词： plasma-induced transparency coupled mode theory graphene refractive index sensor slow-light effect

Evaluation of endocrine disruption and dioxin-like effects of organic extracts from sewage sludge in autumn in Beijing, China

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Frontiers of Environmental Science & Engineering 2014年第3期8卷 433-440页

作者： Cao LIU yiping xu Mei MA Bingbin HUANG Jingdong WU Qingyi MENG Zijian WANG Robert Alan GEARHEART State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Beijing Water Science and Technology Institute Beijing 100048 China Environmental Engineering Department Humboldt State University Arcata CA95521 USA

Study on effective disposal and utilization of sewage sludge has recently been the target of growing interest in China. However, potential risks are associated with the use of sludge due to its contamination with toxic organics, heavy metals and pathogenic microorganisms. In this study, a screening assessment was conducted on sewage sludge samples collected from 17 different sewage treatment plants in Beijing, based on a batch of in vitro bioassays, including a set of recombinant gene yeast assays for endocrine disruption, and an ethoxy resorufin-O- deethylase （EROD） assay using H4IIE cells for aryl hydrocarbon receptor （Ah-R） agonistic activities. Our results suggested that moderate levels of estrogen receptor agonistic activities （0.9 ng E2. g-1 to 6.8 ng E2. gl, dw）, but relative higher androgen receptor antagonistic activ- ities （nd to 45%）, progestin receptor antagonistic activities （nd to 80%） and Ah-R agonistic activities （1390 to 6740 pg 2,3,7,8-tetrachlorodibenzo-p-dioxin （TCDD）·g-1, dw） were found in sewage sludge samples. However, there were no significant correlations between the toxic effects of sewage sludge and the sewage treatment processes. In addition, the 17β-estradiol （E2） equivalent quantity （EEQ） level of the sewage sludge was increased after the composting treatment, whereas the 2,3,7,8-tetrachlorodi- benzo-p-dioxin toxic equivalent quantity （TEQ） level of sewagesludge composted was much lower than that of sewage sludge.

关键词： sewage sludge in vitro bioassay endocrine disruption dioxin-like effect

Fish forewarning of comprehensive toxicity in water environment based on Bayesian sequential method

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Journal of Environmental Sciences 2021年第12期33卷 150-159页

作者： Kaifeng Rao Li Tang Xin Zhang Heyu Xiang Liang Tang Yong Liu Wei Wang Jie Jiang Mei Ma yiping xu Zijian Wang State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Shenzhen Monitoring Centre of Ecology and Environment Shenzhen 518049China Department of Basic Courses Beijing Union UniversityBeijing 100101China Faculty of Mathematics and Statistics Hubei UniversityWuhan 430062China CASA(Wuxi)Environmental Technology Co.Ltd. Wuxi 214024China College of Resources and Environment University of Chinese Academy of SciencesBeijing 101407China

Environmental impact of pollutants can be analyzed effectively by acquiring fish behavioral signals in water with biological behavior sensors. However, a variety of factors, such as the complexity of biological organisms themselves, the device error and the environmental noise, may compromise the accuracy and timeliness of model predictions. The current methods lack prior knowledge about the fish behavioral signals corresponding to characteristic pollutants, and in the event of a pollutant invasion, the fish behavioral signals are poorly discriminated. Therefore, we propose a novel method based on Bayesian sequential,which utilizes multi-channel prior knowledge to calculate the outlier sequence based on wavelet feature followed by calculating the anomaly probability of observed values. Furthermore, the relationship between the anomaly probability and toxicity is analyzed in order to achieve forewarning effectively. At last, our algorithm for fish toxicity detection is verified by integrating the data on laboratory acceptance of characteristic pollutants. The results show that only one false positive occurred in the six experiments, the present algorithm is effective in suppressing false positives and negatives, which increases the reliability of toxicity detections, and thereby has certain applicability and universality in engineering applications.

关键词： Bayesian sequential method Fish electrical signal Outlier detection Anomaly probability Time series forecasting