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Ultrasonographic reference values for assessing normal radial nerve ultrasonography in the normal population

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Neural Regeneration Research 2014年第20期9卷 1844-1849页

作者： Jun Chen shan wu Jun Ren Department of Neurology Affiliated Hospital of Guiyang Medical College Lianshui County Hospital of Jiangsu Proviuce Pharmacology University of Wyoming College of Health Sciences Wyoming INBRE ProgramLaramieWYUSA

High-resolution ultrasound has been used recently to characterize median and ulnar nerves, but is seldom used to characterize radial nerves. The radial nerve is more frequently involved in en- trapment syndromes than the ulnar and median nerves. However, the reference standard for normal radial nerves has not been established. Thus, this study measured the cross-sectional areas of radial nerves of 200 healthy male or female volunteers, aged 18 to 75, using high-resolution ultrasound. The results showed that mean cross-sectional areas of radial nerves at 4 cm upon the lateral epicondyle of the humerus and mid-humerus （midpoint between the elbow crease and axilla） were 5.14± 1.24 and 5.08 ± 1.23 mm2, respectively. The age and the dominant side did not affect the results, but the above-mentioned cross-sectional areas were larger in males （5.31± 1.25 and 5.19 ±1.23 mm2） than in females （4.93 ± 1.21 and 4.93 ± 1.23 mm2, respectively）. In addition, the cross-sectional areas of radial nerves were positively correlated with height and weight （r = 0.38, 0.36, respectively, both P 〈 0.05）. These data provide basic clinical data for the use of high-resolution ultrasound for the future diagnosis, treatment, and prognostic evalua- tion of peripheral neuropathies.

关键词： nerve regeneration high-resolution ultrasound radial nerve cross-sectional area peripheral nerve nerve lesion neural regeneration

Porous Ti_(3)C_(2)T_(x) MXene nanosheets sandwiched between polyimide fiber mats for electromagnetic interference shielding

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Nano Research 2024年第3期17卷 2070-2078页

作者： Wenhao Liang Juntao wu shan Zhang Pei-Yan Zhao Yi Cong Yongqiang Guo Guang-Sheng Wang Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China

With the rapid development of wireless communication technology and electronic devices,the issue of electromagnetic interference(EMI)is becoming increasingly *** a new and flexible electromagnetic interference shielding material has become a challenging ***,a sandwich-structured EMI shielding composite film was prepared using electrospinning and vacuum filtration *** this process,a porous MXene was synthesized through a reaction with cobalt acetate and served as the intermediate layer in the composite film to shield electromagnetic *** electrospun polyimide(PI)fibers were used as the top and bottom layers of the composite film,which can protect the porous MXene from *** lightweight and flexible composite film integrates electromagnetic interference shielding and thermal insulation capabilities,showing excellent comprehensive *** composite film achieves an EMI shielding effectiveness of 48.8 dB in X-band(8.2–12.4 GHz),and absolute shielding effectiveness of the composite film reached a satisfying 4142.43(dB·cm^(2))/*** to the design of a multi-layer porous structure,the density of the composite film is 0.65 g/***,the thermal conductivity of the film is 0.042 W/(m·K)due to the clamping of electrospun PI fibers,showing excellent thermal insulation ***,the composite film exhibits excellent high and low-temperature *** summary,this work provides a feasible strategy for preparing a lightweight polymer-based EMI shielding film.

关键词： porous MXene polyimide electromagnetic interference shielding thermal insulation

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刺猬紫檀及其3种易混材种辨析

中国口岸科学技术 2024年第7期6卷 31-37页

作者：张荃尹文秀应正平虞惠贞吴姗张明哲浙江省检验检疫科学技术研究院杭州310000 杭州海关技术中心杭州310000

本文主要探讨了刺猬紫檀(Pterocarpus erinaceus)、大果紫檀(Pterocarpus macrocarpus)、非洲紫檀(Pterocarpus soyauxii)和安哥拉紫檀(Pterocarpus angolensis)共4种“花梨”木材的商品名及别名、树木及分布、宏观构造、微观特征和材性及用途。通过对以上信息的辨析,可为准确鉴别刺猬紫檀与其他3种易混材提供参考依据,不仅有助于提升海关等执法部门的查验监管能力,还能保护全球木材资源,促进我国木材进出口贸易健康发展。

关键词：刺猬紫檀花梨构造特征辨析

Second organic aerosol formation from the ozonolysis of α-pinene in the presence of dry submicron ammonium sulfate aerosol

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Journal of Environmental Sciences 2008年第10期20卷 1183-1188页

作者： ZHAO Zhe HAO Jiming LI Junhua wu shan Department of Environmental Science and Engineering Tsinghua University Beijing l00084 China

An indoor chamber facility is described for investigation of atmospheric aerosol chemistry. Two sets of α-pinene ozonolysis experiments were conducted in the presence of dry ammonium sulfate seed particle: ozone limited experiments and α-pinene limited experiments. The concentration of gas phase and particle phase species was monitored continuously by on-line instruments and recorded automatically by data sampling system. The evolution of size distribution was measured by a scanning mobility particle sizer ...

关键词： α-pinene ozonolysis secondary organic aerosol (SOA) chamber experiment seed particles

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经脐单孔腹腔镜全子宫双输卵管切除术

中华腔镜外科杂志（电子版） 2024年第1期17卷 58-61页

作者：周树林姜旖邱江南吴姗罗成燕袁琳程文俊南京医科大学第一附属医院妇科江苏200029

目的全子宫双输卵管切除术是治疗妇科疾病的常用方法之一,经脐单孔腹腔镜手术具有疤痕隐蔽、疼痛轻、恢复快的优势,本文探讨经脐单孔腹腔镜在全子宫双输卵管切除术中的解剖知识和手术技巧。方法回顾性分析2023年11月南京医科大学第一附... 详细信息

目的全子宫双输卵管切除术是治疗妇科疾病的常用方法之一,经脐单孔腹腔镜手术具有疤痕隐蔽、疼痛轻、恢复快的优势,本文探讨经脐单孔腹腔镜在全子宫双输卵管切除术中的解剖知识和手术技巧。方法回顾性分析2023年11月南京医科大学第一附属医院妇科收治的1例因子宫平滑肌瘤行经脐单孔腹腔镜全子宫双输卵管切除术患者的临床资料,总结经脐单孔腹腔镜全子宫双输卵管切除术的解剖知识和手术技巧,探讨该术式的近期临床疗效。结果患者成功完成手术,手术时间2 h 5 min,术中失血50 ml。患者术后恢复顺利,3 d出院。术后1月门诊随访,脐部、阴道切口愈合好。结论在熟悉盆腔解剖,适应单孔操作习惯,适当调整操作步骤后,经脐单孔腹腔镜全子宫双输卵管切除能达到多孔腹腔镜手术同等的治疗效果,并具有很好的美容效果。

关键词：子宫平滑肌瘤经脐单孔腹腔镜全子宫双输卵管切除术

Passivation remediation of weakly alkaline Cd-contaminated soils using combined treatments of biochar and sepiolite

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Ecological Processes 2024年第1期13卷 40-52页

作者： Yuxin Zhang shan Gao Hongtao Jia Tao Sun Shunan Zheng Shihang wu Yuebing Sun Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control Ministry of Agriculture and Rural Affairs (MARA)/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety Agro–Environmental Protection InstituteMARA College of Resources and Environment Sciences Xinjiang Agricultural University Rural Energy and Environment Agency Ministry of Agriculture and Rural Affairs

Background Cadmium(Cd) pollution in agricultural soils has become a priority environmental concern globally. A reasonable application of passivators is critical to address the problem. In this study, we examined the remediation effects of rice husk biochar(r BC) and sepiolite(Sep) as single and combined(r BC + Sep) treatments on Cd pollution in a weakly alkaline soil using three maize cultivars(Liyu 16, Zhengdan 958, and Sanbei 218) as test crops. We also explained the mechanisms involved in the remediation *** The pseudo-second-order kinetic equation and Langmuir model could well describe the adsorption process of r BC + Sep for Cd2+. Compared with the control treatment(CK), soil available Cd concentration decreased by 29.51–36.34% under r BC + Sep treatment(p 0.05).Conclusions The application of 0.2% r BC + 0.5% Sep composite passivation material to weakly alkaline Cd-contaminated soil can effectively reduce the Cd concentration of soil and maize.

关键词： Cd Rice husk biochar Sepiolite Passivation restoration Weakly alkaline soil Maize

Influence of blood glucose fluctuations on chemotherapy efficacy and safety in type 2 diabetes mellitus patients complicated with lung carcinoma

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World Journal of Diabetes 2024年第4期15卷 645-653页

作者： Tian-Zheng Fang Xian-Qiao wu Ting-Qi Zhao shan-shan Wang Guo-Mei-Zhi Fu Qing-Long wu Cheng-Wei Zhou Department of Thoracic Surgery The First Affiliated Hospital of Ningbo UniversityNingbo 315020Zhejiang ProvinceChina Department of Endocrine The First Affiliated Hospital of Ningbo UniversityNingbo 315020Zhejiang ProvinceChina Department of Respiratory and Critical Care Medicine The First Affiliated Hospital of Ningbo UniversityNingbo 315020Zhejiang ProvinceChina

BACKGROUND Patients with type 2 diabetes mellitus(T2DM)have large fluctuations in blood glucose(BG),abnormal metabolic function and low immunity to varying degrees,which increases the risk of malignant tumor diseases and affects the efficacy of tumor *** hyperglycemia may have important therapeutic implications for cancer *** To clarify the influence of BG fluctuations on chemotherapy efficacy and safety in T2DM patients complicated with lung carcinoma(LC).METHODS The clinical data of 60 T2DM+LC patients who presented to the First Affiliated Hospital of Ningbo University between January 2019 and January 2021 were retrospectively *** patients underwent chemotherapy and were grouped as a control group(CG;normal BG fluctuation with a mean fluctuation<3.9 mmol/L)and an observation group(OG;high BG fluctuation with a mean fluctuation≥3.9 mmol/L)based on their BG fluctuations,with 30 cases *** indices,tumor markers,serum inflammatory cytokines and adverse reactions were comparatively *** correlation analysis was performed to analyze the correlation between BG fluctuations and tumor *** The fasting blood glucose and 2-hour postprandial blood glucose levels in the OG were notably elevated compared with those in the CG,together with markedly higher mean amplitude of glycemic excursions(MAGE),mean of daily differences,largest amplitude of glycemic excursions and standard deviation of blood glucose(P<0.05).In addition,the OG exhibited evidently higher levels of carbohydrate antigen 19-9,carbohydrate antigen 125,carcinoembryonic antigen,neuron-specific enolase,cytokeratin 19,tumor necrosis factor-α,interleukin-6,and highsensitivity C-reactive protein than the CG(P<0.05).Pearson analysis revealed a positive association of MAGE with serum tumor *** incidence of adverse reactions was significantly higher in the OG than in the CG(P<0.05).CONCLUSION The greater the BG fluctuation in LC patients after

关键词： Blood glucose fluctuation Type 2 diabetes mellitus Lung carcinoma Tumor markers

A review on the GaN-on-Si power electronic devices

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Fundamental Research 2022年第3期2卷 462-475页

作者： Yaozong Zhong Jinwei Zhang shan wu Lifang Jia Xuelin Yang Yang Liu Yun Zhang Qian Sun Key Laboratory of Nano-devices and Applications Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences(CAS)Suzhou 215123China School of Electronics and Information Technology Sun Yat-Sen UniversityGuangzhou 510006China State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Institute of Semiconductor Chinese Academy of SciencesBeijing 100083China

The past decades have witnessed a tremendous development of GaN-based power electronic devices grown on Si *** article provides a concise introduction,review,and outlook of the research developments of GaN-on-Si power device *** comprehensive review has discussed the crucial issues in the state-of-the-art device technology based on both GaN materials epitaxy including stress control and point defects study,and device fabrication including normally offsolutions like Cascode,trench MIS-gate,and p-GaN *** reliability and other common fabrication issues in GaN high electron mobility transistors(HEMTs)are also ***,we give an outlook on the GaN-on-Si power devices from two aspects,namely high frequency,and high power GaN ICs,and GaN vertical power devices.

关键词： GaN-on-Si Epitaxy Power device Transistor Diode Enhancement mode

七星关区暴雨天气特征和“三个叫应”阈值研究

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山地气象学报 2024年第3期48卷 69-73页

作者：帅龙王志红姚浪吴姗罗亚楠李阳东贵州省七星关区气象局贵州七星关551700 贵州省毕节市气象局贵州毕节551700

【目的】为适应新形势下高质量发展要求,降低暴雨引发的山洪、地质及城市内涝等灾害影响,更好地服务于地方政府。【方法】利用2016—2022年毕节国家基本气象站和34个地面自动气象观测站逐小时降雨资料,运用统计分析方法对七星关区暴雨... 详细信息

【目的】为适应新形势下高质量发展要求,降低暴雨引发的山洪、地质及城市内涝等灾害影响,更好地服务于地方政府。【方法】利用2016—2022年毕节国家基本气象站和34个地面自动气象观测站逐小时降雨资料,运用统计分析方法对七星关区暴雨天气特征进行分析,结合七星关区应急局提供的灾情数据,研究“三个叫应”阈值。【结果】七星关区年均暴雨站次107.8站,年均暴雨日数19.2 d;统计时段内7月累计出现36个暴雨日为最多,占27%,月暴雨站次峰值出现在7月达231站;暴雨日数、最大日降水量及最大小时雨强存在着明显的时间、空间不连续变化。【结论】通过局地暴雨天气特征与灾情资料结合,应用百分位法对地方“三个叫应”阈值标准进行修订,利用新标准对2023年暴雨天气过程进行检验应用,发现修订后的“三个叫应”标准在地方应急叫应和调度工作时,更具客观性和参考依据。

关键词：暴雨特征气象服务 “三个叫应”