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Rare Metals 2024年第4期43卷 1570-1579页

作者： Gang Dong Cong Huang Fei-Yang chen Xue-Qin Liu Zhen Li xiao-Li Su Tao Zeng yun-xia chen Yi-Huang chen Yang Wang School of Materials Science and Engineering Jingdezhen Ceramic UniversityJingdezhen333403China Faculty of Materials Science and Chemistry China University of GeosciencesWuhan430074China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou325035China

Given the clean and inexhaustible solar energy from solar light,photocatalytic ammonia synthesis is extremely ***,high electron-hole recombination rates and insufficient active sites severely limited N2 photoreaction ***,we designed and fabricated FeCu alloy nanoparticles anchored on carbon nitride nanosheets with excellent photocatalyt ic ammonia synthesis *** a coupler between Fe and carbon nitride,Cu promotes the separation of photogenerated charge carriers in carbon nitride under solar light irradiation,and renters the semiconductor a forceful electron donor for the Fe active *** accumulated electrons at Fe sites furtherly facilitated the adsorption and activation of the molecular ***,the uniform dispersed FeCu alloy nanoparticles were on carbon nitride nanosheets enhanced the stability of photocataly tic nitrogen reduction reaction,making the artificial photocataly tic ammonia synthesis more sustainable for *** work highlights that a direct electron transfer channel can be used to regulate the photochemical nitrogen fixation network.

关键词： Photocatalytic N_2 fixation Carbon nitride FeCu alloy Active sites Hydrogenation pathway

Clinical Characteristics and Current Interventions in Shock Patients in Chinese Emergency Departments： A Multicenter Prospective Cohort Study

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Chinese Medical Journal 2017年第10期130卷 1146-1154页

作者： Shu-Bin Guo yun-xia chen Xue-Zhong Yu Emergency Department Beijing Chao-Yang Hospital Affiliated to Capital Medical University Beijing 100020 China Emergency Department Peki'ng Union Medical College Hospital Beijing 100730 China

Background： Shock is a life-threatening condition in emergency departments （EDs） and is associated with a high mortality： however, its clinical characteristics and current interventions in China are seldom reported. This study investigated the clinical characteristics and current interventions of shock patients in Chinese EDs. Methods： This multicenter prospective cohort study was conducted in the EDs of 33 academic hospitals in 16 Chinese provinces. Adult shock patients were enrolled from December 2013 to April 2014. Age, sex, comorbidities, shock subtype, and vital signs were recorded on ED an＇ival; details of subsequent interventions and treatments were added. We compared those data between survivors and nonstu＇vivors. All patients were lbllowed tip for 3 days. The primary outcome was 3-day mortality. Binary logistic regression analysis identified the independent predictors of that mortality. Results： We enrolled 1095 shock patients. The 3-day mortality was 27.5%, 36.3%, and 29.0%, respectively, in the whole cohort and for cardiogenic and septic shock. Within the first 24 11, 1039 patients （94.9%） were admitted to the Intensive Care Unit. Use of bicarbonate, epinephrine, and dopamine is an independent predictor lbr mortality. Hemorrhage and trauma （39.1%）, along with sepsis （40.4%） were the most commonly observed causes of shock in the ED. In nondiabetic patients with cardiogenic shock, 3-day mortality was 69.2% for patients needing glucose control -- much higher than in those not needing glucose control （30.0%, P- 0.01 ）. Hydroxyethyl starch （HES） was applied in 29.6% of septic shock patients, and the mortality of septic patients who received HES was much higher than those who did not （38.2% vs. 25. 1%, P = 0.006）. Conclusions： In China, short-term mortality of shock patients in EDs is still high, especially among those with cardiogenic and septic shock. HES application needs to be restricted -- particularly in septic shock patients.

关键词： Emergencies: Mortality Sepsis: Shock: Therapeutics

Contribution of Quick Sequential Organ Failure Assessment Score Combined with Electrocardiography in Risk Stratification of Patients with Acute Pulmonary Embolism

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Chinese Medical Journal 2018年第20期131卷 2395-2401页

作者： Fei Teng yun-xia chen Xin-Hua He Shu-Bin Guo Department of Emergency Beijing Chao-Yang Hospital Capital Medical University Beijing 100020 China Department of Infection and Microbiology Beijing Chao-Yang Hospital Capital Medical University Beijing 100020 China

Background： The quick Sequential Organ Failure Assessment （qSOFA） score emerged recently. We investigated its contribution to risk stratification in acute pulmonary embolism （PE） by combining with electrocardiography （ECG）. Methods： Acute PE patients diagnosed in Beijing Chao-Yang Hospital, Capital Medical University, from 2008 to 2018 were retrospectively studied and divided into high- and low-risk groups by imaging and biomarkers. The ECG scores consisted oftachycardia, McGinn-White sign （S1Q3T3）, right bundle branch block, and T-wave inversion of leads V1-V3. A new combination of qSOFA scores and ECG scores by logistic regression for predicting high-risk stratification patients with acute PE was evaluated by a receiver operating characteristic curve. Results： Totally 1318 patients were enrolled, including 271 in the high-risk group and 1047 in the low-risk group. A combination predictive scoring system named qSOFA-ECG = qSOFA score ＋ ECG score was created. The optimal cutoffvalue for qSOFA-ECG was 2, and the sensitivity, specificity, positive predictive value, and negative predictive value were 81.5%, 72.3%, 43.2%, and 93.8%, respectively. For predicting high-risk stratification and reperfusion therapy, the qSOFA-ECG is superior to PE Severity Index （PESI） and simplified PESI. Conclusions： The qSOFA score contributes to identify acute PE patients with potentially hemodynamic decompensation that need monitoring and possible reperfusion therapy at the emergency department arrival when used in combination with ECG score.

关键词： Electrocardiography Emergency Pulmonary Embolism Quick Sequential Organ Failure Assessment

Psoriasis complicated with venous thromboembolism： report of two cases and a literature review

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Chinese Medical Journal 2011年第10期124卷 1593-1596页

作者： ZHAO yun-xia chen Gang ZHAO Rui-zhen ZHANG xiao-guang Department of Respiratory Medicine Third Affiliated Hospital Hebei Medical University Shijiazhuang Hebei 050051 China

Cases of psoriasis complicated with venous thromboembolism are rarely reported. Here, we report two cases and review the current literature on the subject. Two patients with long-standing severe psoriasis presented with chest pain,shortness of breath and breathing difficulties. The patients were diagnosed using lung ventilation-perfusion scans or computed tomographic pulmonary angiography. Anticoagulation or thrombolytic therapy was initiated, and long-term continuous anticoagulation with warfarin prevented any recurrences.

关键词： psoriasis venous thromboembolism comorbidity

Complex Spectra Structure of an Attosecond Pulse Train Driven by Sub-5-fs Laser Pulses

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Chinese Physics Letters 2011年第7期28卷 137-139页

作者： yun chen-xia TENG Hao ZHANG Wei WANG Li-Feng ZHAN Min-Jie HE Xin-Kui WANG Bing-Bing WEI Zhi-Yi Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190

We present the observation of the additional spectral components between the odd order harmonics in the harmonic spectrum generated from argon gas driven by sub-5-fs laser *** theoretical analysis shows that the asymmetric laser field in both spatial and temporal domains leads to this complicated spectrum structure of high order harmonics.

关键词： laser harmonics spectrum

Effect of artesunate supplementation on bacterial translocation and dysbiosis of gut microbiota in rats with liver cirrhosis

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World Journal of Gastroenterology 2016年第10期22卷 2949-2959页

作者： yun-xia chen Li-Na Lai Hui-Ying Zhang Yang-Hui Bi Li Meng Xu-Jiong Li xiao-xia Tian Li-Min Wang Yi-Min Fan Zhong-Fu Zhao De-Wu Han cheng Ji Department of Microbiology Changzhi Medical College Department of Pharmacology Changzhi Medical College Department of Pathophysiology Changzhi Medical College Department of Physiology Changzhi Medical College Functional Integrative Laboratory Department of PathophysiologyChangzhi Medical College Institute of Hepatology Changzhi Medical College Institute of Hepatology Shanxi Medical University USC Research Center for Liver Disease Department of MedicineUniversity of Southern California

AIM: To evaluate the effect of artesunate(AS) supplementation on bacterial translocation(BT) and gut microbiota in a rat model of liver cirrhosis. METHODS: Fifty-four male Sprague-Dawley rats were randomly divided into a normal control group(N), a liver cirrhosis group(M) and a liver cirrhosis group intervened with AS(MA). Each group was sampled at 4, 6 and 8 wk. Liver cirrhosis was induced by injection of carbon tetrachloride(CCl4), intragastric administration of 10% ethanol, and feeding a high fat diet. Rats in the MA group were intragastrically administered with AS(25 mg/kg body weight, once daily). Injuries of the liver and intestinal mucosa were assessed by hematoxylineosin or Masson's trichrome staining. Liver index was calculated as a ratio of the organ weight(g) to body weight(g). The gut microbiota was examined by automated ribosomal intergenic-spacer analysis of fecal DNA. BT was assessed by standard microbiological techniques in the blood, mesenteric lymph nodes(MLNs), liver, spleen, and kidney. RESULTS: Compared to group N, the body weight was reduced significantly in groups M and MA due to the development of liver cirrhosis over the period of 8 wk. The body weight was higher in group MA than in group M. The liver indices were significantly elevated at 4, 6 and 8 wk in groups M and MA compared to group N. AS supplementation partially decreased the liver indices in group MA. Marked histopathologic changes in the liver and small intestinal mucosa in group M were observed, which were alleviated in group MA. Levels of pro-inflammatory interleukin-6 and tumor necrosis factor-α were significantly elevated at 8 wk in ileal homogenates in group M compared to group N, which were decreased after AS supplementation in group MA. The dysbiosis of gut microbiota indicated by the mean diversity(Shannon index) and mean similarity(Sorenson index) was severe as the liver cirrhosis developed, and AS supplementation had an apparent intervention effect on the dysbiosis of gu

关键词： Hepatic cirrhosis Gut microbiota Bacterial translocation Artesunate Intervention

Reliability and Accuracy of Sepsis-related Organ Failure Assessment Scoring among Emergency Physicians

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Chinese Medical Journal 2018年第2期131卷 247-248页

作者： yun-xia chen Yi-xian Li Shu-Bin Guo Xue Mei Emergency Department Beijing Chao-Yang Hospital Affiliated to Capital Medical University Beijing 100020 China

To the Editor： With the growing importance of Sepsis-related Organ Failure Assessment （SOFA）,t^l clinicians are increasingly concerned about its reliability and accuracy. In Intensive Care Units, SOFA scoring was found to be insufficiently accurate among both physicians and nurses.I-＇31 Few studies have reported the pertbnnance of emergency department （ED） physicians in manually assigning the SOFA score. We therefore conducted a single-center prospective investigation to examine that issue.

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Generation and Measurement of Isolated 160-Attosecond XUV Laser Pulses at 82eV

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Chinese Physics Letters 2013年第9期30卷 54-57页

作者： ZHAN Min-Jie YE Peng TENG Hao HE Xin-Kui ZHANG Wei ZHONG Shi-Yang WANG Li-Feng yun chen-xia WEI Zhi-Yi Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190

Isolated attosecond extreme-ultraviolate(XUV)pulses are generated based on high-harmonic-generation from a neon gas cell driven by carrier-envelope phase stabilized sub-5-fs Ti:sapphire laser pulses at repetition rate of *** characterization of isolated attosecond XUV pulses is demonstrated to be 160-attosecond by attosecond streaking *** development of attosecond source and streaking spectroscopy will allow scientists to explore the electron dynamics in matter.

关键词： spectroscopy second extreme

Influence of masticatory fatigue on the fracture resistance of the pulpless teeth restored with quartz-fiber post-core and crown

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International Journal of Oral Science 2012年第4期4卷 218-220页

作者： Er-Min Nie xia-yun chen Chun-Yuan Zhang Li-Li Qi Ying-He Huang Department of Prosthodontics The First Affiliated HospitalSun Yat-Sen University Department of Prosthodontics The Third Affiliated HospitalSun Yat- Sen University Department of Stomatology Taishan People's Hospital

To investigate whether masticatory fatigue affects the fracture resistance and pattern of lower premolars restored with quartz-fiber post-core and full crown, 44 single rooted lower premolars recently extracted from orthodontic patients were divided into two groups of 22 each. The crowns of all teeth were removed and endodontically treated and then restored with quartz-fiber post-core and full crown. Twenty-two teeth in one group were selected randomly and circularly loaded at 45° to the long axis of the teeth of 127.4 N at a 6 Hz frequency, and the other group was not delivered to cyclic loading and considered as control. Subsequently, all teeth in two groups were continually loaded to fail at 45° to the long axis of the teeth at a crosshead speed of 1 ***-1. The mean destructive force values were （733.88±254.99） and （869.14±280.26） N for the experimental and the control group, respectively, and no statistically significant differences were found between two groups （P〉O.05）. Bevel fracture and horizontal fracture in the neck of root were the major fracture mode of the specimens. Under the circumstances of this study, it seems that cyclic loading does not affect the fracture strength and pattern of the quartz-fiber post-core-crown complex.

关键词： fracture resistance masticatory fatigue pulpless teeth quartz-fiber

非清髓建立混合嵌合体诱导免疫耐受实验研究新进展

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国际免疫学杂志 2011年第1期34卷 9-11页

作者：运晨霞兰太进邓家刚广西中医学院微生物免疫学教研室南宁530001 中药学教研室

迄今为止，临床上尚未能建立一种有效地诱导免疫耐受的方法，而患者长期服用免疫抑制剂会产生许多毒副作用，且免疫抑制剂对慢性排斥和供体失功无明显改善作用。非清髓建立混合嵌合体是一种非常有效的诱导免疫耐受的方法，因而许多学者... 详细信息

迄今为止，临床上尚未能建立一种有效地诱导免疫耐受的方法，而患者长期服用免疫抑制剂会产生许多毒副作用，且免疫抑制剂对慢性排斥和供体失功无明显改善作用。非清髓建立混合嵌合体是一种非常有效的诱导免疫耐受的方法，因而许多学者致力于非清髓建立混合嵌合体的实验研究。

关键词：免疫耐受非清髓混合嵌合体实验研究