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Determination of alcohol compounds using corona discharge ion mobility spectrometry

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Journal of Environmental Sciences 2007年第6期19卷 751-755页

作者： HAN Hai-yan HUANG Guo-dong JIN Shun-ping ZHENG Pei-chao XU Guo-hua LI jian-quan wang Hong-mei CHU Yan-nan Laboratory of Environmental Spectroscopy and Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 China

Ion mobility spectrometry （IMS） is a very fast, highly sensitive, and inexpensive technique, it permits efficient monitoring of volatile organic compounds like alcohols. In this article, positive ion mobility spectra for six alcohol organic compounds have been systematically studied for the first time using a high-resolution IMS apparatus equipped with a discharge ionization source. Utilizing protonated water cluster ions （H2O）nH^＋ as the reactant ions and clean air as the drift gas, alcohol organic compounds, ethanol, 1- propanol, 2-propanol, 1-butanol, 1-pentanol and 2-octanol, all exhibit product ion characteristic peaks in their respective ion mobility spectrometry, that is a result of proton transfer reactions between the alcohols and reaction ions （H2O）nH^＋. The mixture of these alcohols, including two isomers, has been detected, and the results showed that they could be distinguished effectively in the ion mobility spectrum. The reduced mobility values have been determined, which are in very well agreement with the traditional ^63Ni-IMS experimental values. The exponential dilution method was used to calibrate the alcohol concentrations, and a detection limit available for the alcohols is in order of magnitude of a few ng/L.

关键词： alcohols VOCs ion mobility spectrometry proton transfer reaction

Fast emergency control strategy calculation based on dynamic equivalence and integral sensitivity

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Frontiers of Information Technology & Electronic Engineering 2019年第8期20卷 1119-1133页

作者： Yi-fan GAO jian-quan wang Tan-nan XIAO Dao-zhuo jianG College of Electrical Engineering Zhejiang University

To simplify the transient stability analysis of a large-scale power system and realize real-time emergency control,a fast transient stability simulation algorithm based on real-time dynamic equivalence is *** models are grouped and aggregated according to a fast numerical integration.A fast calculation method of the admittance matrix is then proposed to calculate the parameters of an equivalent system,and numerical integration is performed using the obtained equivalent ***,based on integral sensitivity,a new fast emergency control strategy is proposed for the equivalent *** final emergency control strategy is obtained by mapping the control strategy for the equivalent system back to the original *** results of a simulation on an East China Power System that includes 496 generators and 5075 buses show that the suggested algorithm can output an accurate transient stability simulation result and form an effective emergency control *** proposed algorithm is much faster than the existing solutions and has the potential to be used for online pre-decision.

关键词： Emergency control Transient stability Numerical integration Dynamic equivalence Integral sensitivity

K-19 mRNA RT-PCR in detecting micrometastasis in regional lymph nodes of gastric cancer

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World Journal of Gastroenterology 2006年第32期12卷 5219-5222页

作者： jian Suo quan wang Hong-Juan Jin Hong Li Hang Zhao Department of General Surgery First Hospital Changchun 130021 Jilin Province China

AIM： To investigate the value and prospect of RT-PCR in detecting micrometastasis in regional lymph nodes of gastric cancer. METHODS： Histopathology was used and K19 mRNA expression was detected by RT-PCR in tumor tissues and lymph nodes from gastric cancer patients undergoing radical resection of gastric carcinoma. RESULTS： K19 mRNA was expressed in all tumor specimens of 30 cases; of the 126 lymph nodes, 26 were histopathologically positive （20.6%）, and 42 positive （33.3%） by RT-PCR. Amplification fragments of 460 and 540 bp were shown in all the tumor tissues and metastatic lymph nodes after K19 and β-actin RT-PCR, while only a 540 bp fragment appeared in the lymph nodes of non-tumor patients. CONCLUSION： K19 mRNA RT-PCR is sensitive and specific in testing micrometastasis in regional lymph nodes of gastric cancer, and it is superior to routine histopathology.

关键词： K-19 mRNA RT-PCR Micrometastasis Gastric cancer

Acute aortic occlusion as an unusual embolic complication of cardiac myxoma

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Chinese Medical Journal 2006年第4期119卷 342-344页

作者： ZHANG jian DUAN Zhi-quan wang Chuan-jiang SONG Qing-bin LUO Ying-wei XIN Shi-jie Department of Vascular Surgery First Affiliated Hospital of China Medical University Shenyang 110001 China

Acute aortic occlusion is an infrequent but dangerous vascular emergency with a mortality rate of 50%, resulting from aortic saddle embolus, thrombosis of an atherosclerotic abdominal aorta, or sudden thrombosis of a... 详细信息

关键词： myxoma embolization

MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self‑Powered Motion Sensing

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Nano-Micro Letters 2025年第3期17卷 265-279页

作者： Yu‑Ze wang Yu‑Chang wang Ting‑Ting Liu quan‑Liang Zhao Chen‑Sha Li Mao‑Sheng Cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of Materials Science and Engineering Peking UniversityBeijing 100871People’s Republic of China School of Mechanical and Material Engineering North China University of TechnologyBeijing 100144People’s Republic of China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080People’s Republic of China

Polymeric microwave actuators combining tissue-like softness with programmablemicrowave-responsive deformation hold great promise for mobile intelligentdevices and bionic soft robots. However, their application is challenged by restricted electromagneticsensitivity and intricate sensing coupling. In this study, a sensitized polymericmicrowave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx(MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique spacechargepolarization and interfacial polarization, resulting in significant improvements of230% in the dielectric loss factor and 830% in the apparent efficiency of electromagneticenergy harvest. The sensitized microwave actuation demonstrates as the shortenedresponse time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (upto 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combinesdriving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of ~ 3 mV) duringactuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approachfor developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

Circulating tumor cells as potential prognostic biomarkers for earlystage pancreatic cancer:A systematic review and meta-analysis

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World Journal of Clinical Oncology 2023年第11期14卷 504-517页

作者： Zi-Han Zhang Yi-Wen Bao Ya-Jun Zhao jian-quan wang Jin-Tao Guo Si-Yu Sun Department of Gastroenterology Shengjing Hospital of China Medical UniversityShenyang 110004Liaoning ProvinceChina

BACKGROUND Pancreatic cancer is difficult to be diagnosed early clinically,while often leads to poor *** optimal personalized treatment plan can be provided to pancreatic cancer patient at an earlier stage,this can greatly improve overall survival(OS).Circulating tumor cells(CTCs)are a collective term for various types of tumor cells present in the peripheral blood(PB),which are formed by detachment during the development of solid tumor *** CTCs undergo apoptosis or are phagocytosed after entering the PB,whereas a few can escape and anchor at distal sites to develop metastasis,increasing the risk of death for patients with malignant *** To investigate the significance of CTCs in predicting the prognosis of early pancreatic cancer *** The PubMed,EMBASE,Web of Science,Cochrane Library,China National Knowledge Infrastructure,China Biology Medicine,and ChinaInfo databases were searched for articles published through December *** were considered qualified if they included patients with early pancreatic cancer,analyzed the prognostic value of CTCs,and were full papers reported in English or *** were selected and assessed using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses protocol and the Newcastle-Ottawa Scale *** used a funnel plot to assess publication *** From 1595 publications,we identified eight eligible studies that collectively enrolled 355 patients with pancreatic *** these original studies,two were carried out in China;three in the United States;and one each in Italy,Spain,and *** eight studies analyzed the relevance between CTCs and the prognosis of patients with early-stage pancreatic cancer after surgery.A meta-analysis showed that the patients that were positive pre-treatment or post-treatment for CTCs were associated with decreased OS[hazard ratio(HR)=1.93,95% confidence interval(CI):1.197-3.126,P=0.007]and decreased relapse-free/disease-f

关键词： Pancreatic cancer Surgery Prognosis Systematic review Meta-analysis Biomarkers

Heterotopic ossification after arthroscopy for hip impingement syndrome

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Chinese Medical Journal 2019年第7期132卷 827-833页

作者： Guan-Ying Gao Xin Zhang Ling-Hui Dai Hong-Jie Huang Rui-Qi Wu Xiao-Dong Ju Yu Mei Xing-Yue Niu jian-quan wang Yan Xu Institute of Sports Medicine Beijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing 100191China

Background:Heterotopic ossification(HO)is a known complication of hip *** investigated incidence of HO after hip arthroscopy and determined whether revision for HO improved ***:A retrospective study was conducted on 242 patients(140 men and 102 women,mean age:36.2±9.5 years)who underwent hip arthroscopy for femoroacetabular impingement(FAI)between January 2016 and January *** average followup period was 22.88±11.74 months(range:11-34 months).Thirteen(5.37%)cases of HO(six men and seven women,five left hips and eight right hips;mean age:37.5±4.7 years)were *** them,four cases with HO with obvious pain symptoms and persistent non-remission underwent revision surgery to remove *** follow-up was *** analog scale(VAS),modified Harris Hip Score(mHHS),and non-Arthritis Hip Score(NAHS)were evaluated and compared between HO and non-HO *** sample t test,Mann-Whitney U test and the Chi-square test were used for inter-group *** degree was evaluated using Brooker *** and function were evaluated before and after ***:A total of 242 patients were involved in this *** cases(5.4%)had imaging evidence of ***(9/13)were classified as Brooker stageⅠ,three(3/13)Brooker stageⅡ,and one(1/13)Brooker stageⅢ.HO was detected by ultrasonography as early as 3 weeks after *** primary surgery,the mHHS of the HO group and non-HO group increased by 13.00(8.50,25.50)and 24.00(14.00,34.50)points(Z=-1.80,P=0.08),NAHS increased by 18.00(9.50,31.50)and 26.00(13.50,36.00)points(Z=-1.34,P=0.18),and VAS decreased by 3.00(2.00,4.00)and 4.00(3.00,4.50)points(Z=-1.55,P=0.12).Average follow-up time after revision was 9.00±2.94 months;mHHS increased by 34.75 points t=-55.23,P<0.01)and NAHS by 28.75 points t=-6.03,P<0.01),and VAS decreased by 4 points t=9.80,P<0.01).HO and non-HO patients were similar for demographic and surgical data,and clinical and functional scores.

关键词： Heterotopic ossification Hip Arthroscopy Femoroacetabular impingement

Preparation and Performance of Ternary Early Strength Agent and Quercetin Composite Cement Sealing Material

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 130-140页

作者： LIU jian CHEN Meiting JI Xiaoli XU Chao wang Chunmei Department of Safety Science and Engineering Anhui University of Science and TechnologyHuainan 232001China Key Laboratory of Mine Safety and High Efficient Mining Jointly Built by Province and Education Ministry Anhui University of Science and TechnologyHuainan 232001China Department of Chemical Engineering and Explosives Anhui University of Science and TechnologyHuainan 232001China

A ternary early-strengthening agent consisting of calcium formate+triethanolamine+lithium sulfate was compounded with quercetin to shorten the setting time of cementitious materials while ensuring their early *** optimum ratio of the three early-strengthening agents was determined as 0.5%calcium formate+0.04%triethanolamine+0.4%lithium sulfate by response surface *** effects of the ternary early-strengthening agent composed of calcium formate+triethanolamine(TEA)+lithium sulfate on cementitious pore sealing materials under the synergistic effect of quercetin were studied by means of the performance tests of compressive strength,fluidity,and setting time,and the microstructural characterizations of X-ray powder diffractometer(XRD),thermogravimetry(TG-DSC)and scanning electron microscopy(SEM).The study shows that the synergistic effect of ternary early-strengthening agent and quercetin forms a multi-performance composite admixture for cementitious *** best performance was obtained with the compounding scheme of 0.5%calcium formate+0.04%triethanolamine+0.4%lithium sulfate ternary early-strengthening agent and 0.05%*** compressive strength of 1,3,7,and 28 d are 94.8%,39.8%,42%,and 28%higher than those of the blank group,*** initial time and final setting time are 41 and 57 minutes,*** to the microscopic analysis,the network and fibrous C-S-H gels generated by ternary early-strengthening agents are attached to the surface promoted by quercetin,which forms skeleton support while thickening and solidifying the cement slurry,which enhances the early compressive strength of the cement-based materials.

关键词： sealing material ternary early-strengthening agent quercetin synergetic effect response surface methodology

Ideal Bi‑Based Hybrid Anode Material for Ultrafast Charging of Sodium‑Ion Batteries at Extremely Low Temperatures

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Nano-Micro Letters 2025年第3期17卷 152-167页

作者： Jie Bai jian Hui Jia Yu wang Chun Cheng Yang Qing jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022People’s Republic of China

Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at−20°C or ***,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely ***,a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock *** a hybrid shows an unprecedented rate performance(237.9 mAh g^(−1)at 2 A g^(−1))at−60℃,outperforming all reported SIB anode *** with a Na_(3)V_(2)(PO_(4))_(3)cathode,the energy density of the full cell can reach to 181.9 Wh kg^(−1)at−40°*** on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries