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Critical bubble radius in solvent sublation

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Chinese Chemical Letters 2007年第10期18卷 1293-1296页

作者： peng yu bi hui ru dong nan nan wang College of Science Beijing University of Chemical Technology Beijing 100029 People＇s Republic of China

The complex compound of dithizone-Co（Ⅱ） was separated and concentrated from the aqueous phase to n-octanol by solvent sublation. From the analysis of the coalescence behavior of bubbles on water-organic interface, the conception of critical bubble radius was proposed, and the value of the critical bubble radius in the water-octanol system was obtained： 1.196 × 10^-3 m. The simulation of the mathematical model using CBR and experimental data is completed with perfect results, and the simulation of the mathematical model using CBR is very different with the classic one. The analytical results proved that the critical bubble radius should be adequately considered in mathematical model of solvent sublation.

关键词： Solvent sublation Coalescence behavior Bubble Critical bubble radius

Effect of water droplet in solvent sublation

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Chinese Chemical Letters 2008年第5期19卷 623-626页

作者： peng yu bi hui ru dong nan nan wang College of Science Beijing University of Chemical Technology Beijing 100029 China

Aqueous phase layer around bubble and water droplet are two additional processes in solvent sublation. In the dynamic process of mass transfer, they are always neglected, but they are very important in the investigation of thermodynamic equilibrium. In this paper, the effect of water droplet in solvent sublation was discussed in detail, and the previous mathematical model of solvent subaltion was improved. Matlab 6.5 was used to simulate the process of water droplets, and the comparison between the previous hypothesis and the improvement in this paper showed the superiority, especially in the investigation of thermodynamic equilibrium. Moreover, the separation and concentration of the complex compound dithizone-Co（Ⅱ） from aqueous phase to n-octanol by solvent sublation also proved the improved mathematical model was reasonable.

关键词： Solvent sublation Water droplet Mathematical model

Predicting hepatocellular carcinoma: A new non-invasive model based on shear wave elastography

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World Journal of Gastroenterology 2024年第25期30卷 3166-3178页

作者： dong Jiang Yi Qian Yi-Jun Gu ru wang Hua yu hui dong dong-yu Chen Yan Chen Hao-Zheng Jiang bi-Bo Tan Min peng Yi-Ran Li Department of Ultrasound Eastern Hepatobiliary Surgery HospitalThe Third Affiliated Hospital of Naval Medical UniversityShanghai 200433China Department of Pathology Shanghai Eastern Hepatobiliary Surgery HospitalThird Affiliated Hospital of Naval Medical UniversityShanghai 200433China Department of College of Art and Science Case Western Reserve UniversityClevelandOH 44106United States Ultrasound Diagnosis PLA Naval Medical CenterShanghai 200437China

BACKGROUND Integrating conventional ultrasound features with 2D shear wave elastography(2D-SWE)can potentially enhance preoperative hepatocellular carcinoma(HCC)*** To develop a 2D-SWE-based predictive model for preoperative identification of *** A retrospective analysis of 884 patients who underwent liver resection and pathology evaluation from February 2021 to August 2023 was conducted at the Oriental Hepatobiliary Surgery *** patients were divided into the modeling group(n=720)and the control group(n=164).The study included conventional ultrasound,2D-SWE,and preoperative laboratory *** logistic regression was used to identify independent predictive factors for RESULTS In the modeling group analysis,maximal elasticity(Emax)of tumors and their peripheries,platelet count,cirrhosis,and blood flow were independent risk indicators for *** factors yielded an area under the curve of 0.77(95%confidence interval:0.73-0.81)with 84%sensitivity and 61%*** model demonstrated good calibration in both the construction and validation cohorts,as shown by the calibration graph and Hosmer-Lemeshow test(P=0.683 and P=0.658,respectively).Additionally,the mean elasticity(Emean)of the tumor periphery was identified as a risk factor for microvascular invasion(MVI)in malignant liver tumors(P=0.003).Patients receiving antiviral treatment differed significantly in platelet count(P=0.002),Emax of tumors(P=0.033),Emean of tumors(P=0.042),Emax at tumor periphery(Pnant liver lesions,correlating significantly with MVI and antiviral treatment efficacy.

关键词： Shear wave elastography Predicting model Microvascular invasion Antiviral treatment Hepatocellular carcinoma

Human bocavirus 1 and 2 genotype-specific antibodies for rapid antigen testing in pediatric patients with acute respiratory infections

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World Journal of Pediatrics 2023年第10期19卷 1009-1016页

作者： Ri De Yan-peng Xu Fang wang yu-Tong Zhou Pan-Deng Shi ru-nan Zhu yu Sun Li-Ying Liu Li-Ping Jia hui-Jin dong hui Zhao Cheng-Feng Qin Lin-Qing Zhao Laboratory of Virology Beijing Key Laboratory of Etiology of Viral Diseases in ChildrenCapital Institute of PediatricsBeijing 100020China State Key Laboratory of Pathogen and biosecurity Beijing Institute of Microbiology and EpidemiologyAcademy of Military Medical SciencesBeijing100071China

Background Previous serological studies of human bocavirus(HBoV)1 could not exclude cross-reactivity with the other three HBoVs,particularly *** To search for genotype-specific antibodies against HBoV1 and HBoV2,the divergent regions(DRs)located on the major capsid protein VP3 were defined through viral amino acid alignment and structure ***-deduced peptides were used as antigens to harvest corresponding anti-DR rabbit *** determine their genotype specificities for HBoV1 and HBoV2,these sera samples were used as antibodies against the antigens VP3 of HBoV1 and HBoV2(expressed in Escherichia coli)in western blotting(WB),enzyme-linked immunosorbent assay(ELISA),and bio-layer interferometry(BLI)***,the antibodies were evaluated with clinical specimens from pediatric patients with acute respiratory tract infection by indirect immunofluorescence assay(IFA).Results There were four DRs(DR1–4)located on VP3 with different secondary and tertiary structures between HBoV1 and *** the reactivity with VP3 of HBoV1 or HBoV2 in WB and ELISA,high intra-genotype cross-reactivity of anti-HBoV1 or HBoV2 DR1,DR3,and DR4,but not anti-DR2,was ***-specific binding capacity of anti-DR2 sera was confirmed by BLI and IFA,in which only anti-HBoV1 DR2 antibody reacted with HBoV1-positive respiratory *** Antibodies against DR2,located on VP3 of HBoV1 or HBoV2,were genotype specific for HBoV1 and HBoV2,respectively.

关键词： Divergent regions Genotype-specific antibody Human bocavirus 1 and 2 Major capsid protein VP3

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光谱法分析乙丙共聚物的序列结构及链节比

高等学校化学学报 2006年第5期27卷 961-965页

作者：董慧茹陶红王楠楠毕鹏禹北京化工大学理学院北京100029

用FTIR,1H NMR和13C NMR分析乙丙共聚物的序列结构与链节比.通过对乙丙共聚物1H NMR,13C NMR和13C1-H二维核磁共振谱的综合分析,提出了与前人不同的归属,并提出了不同位置碳原子积分面积相关性分析方法,该方法避免了烦琐的理论计算,可... 详细信息

用FTIR,1H NMR和13C NMR分析乙丙共聚物的序列结构与链节比.通过对乙丙共聚物1H NMR,13C NMR和13C1-H二维核磁共振谱的综合分析,提出了与前人不同的归属,并提出了不同位置碳原子积分面积相关性分析方法,该方法避免了烦琐的理论计算,可简便地得到乙丙共聚物的主要序列结构.通过比较1H NMR和13C NMR计算乙丙共聚物中乙烯、丙烯链节比,表明可以用1H NMR代替13C NMR完成对乙丙共聚物中乙烯、丙烯链节比的定量计算.

关键词：核磁共振谱红外光谱乙丙共聚物序列结构链节比

Molecular epidemiology of coxsackievirus A16 circulating in children in Beijing, China from 2010 to 2019

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World Journal of Pediatrics 2021年第5期17卷 508-516页

作者： Ya-Fang Hu Li-Ping Jia Fang-yuan yu Li-Ying Liu Qin-Wei Song hui-Jin dong Jie Deng yuan Qian Lin-Qing Zhao Li Deng hui Huang ru-nan Zhu Laboratory of Virology.Beijing Key Laboratory of Etiology of Viral Diseases in Children Capital Institute of Pediatrics2 Yabao RoadChaoyang DistrictBeijing 100020China Department of Clinical Laboratory Shanghai Children's HospitalShanghai Jiaotong UniversityLuding Road 355Putuo DistrictShanghai 200040China Department of Clinical Laboratory Children's Hospital of Capital Institute of Pediatrics2 Yabao RoadBeijing 100020China Department of Infectious Diseases Children's Hospital of Capital Institute of Pediatrics2 Yabao RoadBeijing 100020China

Background Coxsackievirus A16(CVA16)is one of the major etiological agents of hand,foot and mouth discase(HFMD).This study aimed to investigate the molecular epidemiology and evolutionary characteristics of *** Throat swabs were collected from children with HFMD and suspected HFMD during ***(EVs)were detected and typed by real-ime reverse transcription-polymerase chain reaction(RT-PCR)and *** genotype,evolutionary rate,the most recent common ancestor,population dynamics and selection pressure of CVA16 were analyzed based on viral protein gene(VPI)by bioinformatics *** A total of 4709 throat swabs were *** were detected in 3180 samples and 814 were CVA16 *** than 81%of CVA 16-positive children were under 5 years *** prevalence of CVA 16 showed obvious periodic fluctuations with a high level during 2010--2012 followed by an apparent decline during ***,the activities of CVA16 increased gradually during *** the Beijing CVA16 strains belonged to sub-genotype bi,and B Ib was the dominant *** B Ic strain was detected in Bejing for the first time in *** estimated mean evolutionary rate of VPI gene was 4.49x 103 substitution/site/*** gradually fixed at site-23 of VP1 since *** sites were detected under episodic positive selection,one of which(site-223)located in neutralizing linear epitope *** The dominant strains of CVA 16 belonged to clade B lb and evolved in a fast evolutionary rate during 2010-2019 in *** provide more favorable data for HFMD prevention and control,it is necessary to keep attention on molecular epidemiological and evolutionary characteristics of CVA16.

关键词： Coxsackievirus A16 Genetic evolution Molecular epidemiology Phylogenetic analysis

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润滑油黏度指数改进剂组成的综合分析方法

北京化工大学学报（自然科学版） 2006年第1期33卷 77-81页

作者：陶红董慧茹王楠楠毕鹏禹北京化工大学理学院北京100029

采用光谱法表征了未知组成的润滑油黏度指数改进剂,用1H-NMR确定其主要序列结构和各种单体的聚合比,用凝胶渗透色谱法确定其相对分子质量和相对分子质量分布,并将1H-NMR和凝胶渗透色谱联用确定其聚合度.将所述方法用于九种黏度指数改进... 详细信息

采用光谱法表征了未知组成的润滑油黏度指数改进剂,用1H-NMR确定其主要序列结构和各种单体的聚合比,用凝胶渗透色谱法确定其相对分子质量和相对分子质量分布,并将1H-NMR和凝胶渗透色谱联用确定其聚合度.将所述方法用于九种黏度指数改进剂样品的综合分析：1^#～8^#样品的化学组成为乙丙共聚物,序列结构以EEE、PEP、EPE和PEE结构为主,数均相对分子质量在52000～120000之间,多分散性在1.90～2.90之间,并分别计算其平均聚合度;9#样品为乙丙共聚物和聚苯乙烯的共混物,序列结构以（PE）n为主,两种组分的数均相对分子质量分别为540969和103383,并通过综合分析确定出两种组分的质量分数及单体平均聚合度等参数.

关键词：润滑油黏度指数改进剂光谱法凝胶渗透色谱法综合分析

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乙丙共聚物-聚苯乙烯共混物的序列结构表征

北京化工大学学报（自然科学版） 2006年第3期33卷 85-88页

作者：董慧茹毕鹏禹陶红王楠楠北京化工大学理学院北京100029

用红外光谱和反转门控13C-NMR谱表征了乙丙共聚物-聚苯乙烯共混物中两组分的主要序列结构。同时,还对该共混物的13C-NMR谱进行了较为细致的分析,首次详细分析验证了该共混物中不同位置碳原子积分面积的相关性。

关键词：乙丙共聚物聚苯乙烯共混序列结构

Relative probabilities of breakup channels in reactions of^(6.7)Li with^(209)biat energies around and above the Coulomb barrier

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Chinese Physics C 2021年第5期45卷 141-148页

作者： Yong-Jin Yao Cheng-Jian Lin Lei Yang nan-ru Ma dong-Xi wang Gao-long Zhang Guang-Xin Zhang hui-Ming Jia Feng Yang Fu-peng Zhong Pei-Wei Wen Xiu-Bo Qin Hong-Ming Zhao State Key Laboratory of Software Development Environment Beihang UniversityBeijing 100191China School of Physics Beihang UniversityBejing 100191China China Institute of Atomic Energy Beijing 102413China Guangxi Normal University Guangxi 541004China X Lab the Second Academy of CASICBejjing 100854China

Coincidence measurements of breakup fragments in reactions of^(6.7)with^(209)bi at energies around and above the Coulomb barrier were carried out using a large solid-angle covered detector *** the Q values along with the relative energies of the breakup fragments,different breakup components(prompt breakups and delayed breakups)and different breakup modes(α+t,α+d,α+p,andα+α)are distinguished.A new breakup mode,α+t,is observed in^(6)Li-induced reactions at energies above the Coulomb *** between breakup modes and breakup components as well as their variations with the incident energy are *** results will help us better understand the breakup effects of weakly bound nuclei on the suppression of a complete fusion,particularly for the above-barrier energies.

关键词： breakup mechanism coincidence measurement weakly bound nucleus