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菌肥及泥炭土浸提液对植物提取土壤Cd的影响

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农业环境科学学报 2024年第5期43卷 1029-1035页

作者：黄彦黄靖淇钟娴慧吴启堂陈杨梅卫泽斌华南农业大学资源环境学院广东省农业农村污染治理与环境安全重点实验室广州510642

采用温室盆栽试验,研究菌肥和泥炭土浸提液对东南景天生物量、Cd富集特征、土壤Cd有效性和土壤理化性质及对后茬水稻在落干条件下水稻Cd的影响。结果表明,菌肥和泥炭土浸提液均能提高东南景天对土壤重金属的提取效率,其中施用两次液体... 详细信息

采用温室盆栽试验,研究菌肥和泥炭土浸提液对东南景天生物量、Cd富集特征、土壤Cd有效性和土壤理化性质及对后茬水稻在落干条件下水稻Cd的影响。结果表明,菌肥和泥炭土浸提液均能提高东南景天对土壤重金属的提取效率,其中施用两次液体菌肥的效果最好,东南景天对Cd提取量为0.34 mg·pot^(-1),是对照的3.1倍,泥炭土浸提液处理的东南景天Cd提取量为0.32 mg·pot^(-1),是对照的2.9倍,这两种处理对Cd的提取率较高,达到13%~15%,土壤全量Cd的降低幅度达到17.55%~20.41%。东南景天收获后种植水稻,落干条件下促进了水稻对Cd的吸收,稻米和茎叶的Cd提取量较对照增幅分别为30.31%~396.24%和12.36%~257.65%,其中在菌肥及泥炭土浸提液联合处理下水稻对Cd的吸收最大,稻米和茎叶的Cd含量分别为2.14 mg·kg^(-1)和2.88 mg·kg^(-1),水稻地上部对Cd总提取率达到3.15%。因此,施用两次菌肥是提高东南景天提取土壤Cd的有效措施,菌肥与泥炭土浸提液联合施用在落干条件下显著强化了水稻对土壤Cd的提取。

关键词：植物修复菌肥泥炭土浸提液东南景天水稻镉

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碳钢和不锈钢在海洋SRB、IRB和IOB下的点蚀研究现状

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表面技术 2024年第2期53卷 15-27,70页

作者：陈杨嵋贺小燕黄谦熊汉桢白秀琴武汉理工大学船海与能源动力工程学院武汉430063 武汉理工大学国家水运安全工程技术研究中心可靠性工程研究所武汉430063 武汉理工大学水路交通控制全国重点实验室武汉430063

微生物腐蚀(Microbiological Induced Corrosion,MIC)带来的危害占海洋腐蚀危害的20%。微生物腐蚀是指由于微生物的生命活动及其代谢产物与金属材料相互作用,影响腐蚀反应的阴极和阳极过程所引发的腐蚀现象,已成为海运业面临的重大技术... 详细信息

微生物腐蚀(Microbiological Induced Corrosion,MIC)带来的危害占海洋腐蚀危害的20%。微生物腐蚀是指由于微生物的生命活动及其代谢产物与金属材料相互作用,影响腐蚀反应的阴极和阳极过程所引发的腐蚀现象,已成为海运业面临的重大技术难题,研究海洋微生物腐蚀对推进我国海洋事业的发展有重要意义。金属材料微生物腐蚀包括全面腐蚀和局部腐蚀,局部腐蚀的危害更大,而点蚀被认为是危害最大的局部腐蚀形式。海洋微生物种类繁多,本文聚焦于硫元素的参与者硫酸盐还原菌(Sulfate-reducing Bacteria,SRB)、铁元素的参与者铁还原细菌(Iron-reducing Bacteria,IRB)和铁氧化细菌(Iron-oxidizing Bacteria,IOB)所引发的微生物点蚀问题,包括由细菌不均匀的生物膜与腐蚀产物膜以及细菌本身的特性引起的点蚀。以广泛应用于海洋平台和船舶的碳钢和不锈钢为对象,分析其在海洋SRB、IRB和IOB下的点蚀状况,从腐蚀形貌和腐蚀产物两方面对比了碳钢、不锈钢在不同细菌体系中的腐蚀差异,腐蚀形貌分析包括腐蚀产物形貌和去除腐蚀产物后金属表面形貌的分析,腐蚀产物分析主要聚焦于金属材料表面不同成分与含量的变化。从代谢产物理论、氧浓差电池作用理论阐释了碳钢和不锈钢的点蚀机理,指出微生物点蚀研究需要综合考虑多种因素,包括多菌种的相互作用和多种环境因素对金属材料的点蚀影响,以及微生物对耐蚀金属材料的点蚀影响等。

关键词：微生物点蚀碳钢不锈钢腐蚀形貌点蚀机理

《神经精神系统疾病》整合课程期末考试实践研究

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中国继续医学教育 2024年第3期16卷 11-16页

作者：陈彦如刘继红李小凤陈阳美重庆医科大学第二临床学院神经病学教研室重庆400072

目的探讨《神经精神系统疾病》整合课程应用美国执业医师考试(United States Medical Licensing Examination,USMLE)模式试题实施期末考试的可行性及有效性。方法选取重庆医科大学第二临床学院2016级临床医学“5+3”学制学生130名为研... 详细信息

目的探讨《神经精神系统疾病》整合课程应用美国执业医师考试(United States Medical Licensing Examination,USMLE)模式试题实施期末考试的可行性及有效性。方法选取重庆医科大学第二临床学院2016级临床医学“5+3”学制学生130名为研究对象,于2020年2—9月通过分析USMLE试题特点、梳理课程知识点、开发USMLE模式试题、召开命题教研会等步骤编排USMLE模式期末考试题,以保证期末试题均符合USMLE模式并覆盖课程所有需“掌握”的知识点,观察分析考试结果。结果学生平均成绩(111.57±15.72)分,全卷难度适中(0.74)、区分度良好(0.31)、信度适中(0.72),有效达到考试目的。USMLE模式试题受到学生广泛好评(好评率91%)。结论USMLE模式试题契合器官系统整合教学宗旨,实践证实应用其实施期末考试的可行性及有效性,期待USMLE模式试题在中国医学本科教育期末考试中的应用。

关键词：器官系统整合教学医学本科教育期末考试 USMLE 课程改革神经精神系统

A case of migraine misdiagnosed as epilepsy

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Acta Epileptologica 2023年第1期6卷 52-55页

作者： Yuting Yang Xi Peng yangmei chen Chongqing Medical University Chongqing 400010China

Background:Migraine and epilepsy are both episodic disorders,with some overlapping symptoms,mechanisms and ***,there is a comorbid relationship between *** migraine patients may exhibit epileptic discharges by electroencephalogram(EEG)***,the two conditions are easily *** presentation:We reported a 16-year-old female patient who was admitted to our hospital due to repeated headaches with disturbance of *** discharge was recorded by long-term *** patient had been misdiagnosed as epilepsy,and had no response to anti-seizure medicines(ASMs).We revised her diagnosis and prescribed ibuprofen in her acute episode and prophylactic medicine,including funarizine and amitriptyline in her interictal *** week later,her headache ***:This patient manifested with altered levels of consciousness during headache episodes,and the abnormal EEG results lead to the misdiagnosis as *** should be cautious to the distinction between migraine and epilepsy.

关键词： Epilepsy Migraine Electroencephalogram

miRNA-let-7i modulates status epilepticus via the TLR4 pathway

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Acta Epileptologica 2022年第3期5卷 175-185页

作者： Shu Ou Xi Liu Tao Xu Xinyuan Yu Teng Wang yangmei chen Haiyan Luo Department of Neurology The Fengjie People’s HospitalChongqing 404600China Department of Neurology The Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China

Background:Status epilepticus(SE)is a neurological emergency associated with high mortality and *** SE episodes cannot be quickly and effectively terminated with current ***-Let-7i,a member of the miRNA-Let-7 family,has been found to be associated with a variety of brain pathophysiological and neurological ***,its role in SE remains elusive and requires further ***:The expression of miRNA-Let-7i was detected in temporal lobe epilepsy(TLE)patients and SE model rats using the real-time quantitative polymerase chain reaction(RT-qPCR)*** assays were performed in pilocarpine-induced SE model,and a whole-cell current clamp technique was employed to examine neuronal *** apoptosis was evaluated by Nissl staining and terminal deoxynucleotidyl transferase-mediated dUTP end-labeling(TUNEL)***:The expression of miRNA-Let-7i was significantly reduced in the cortex and hippocampus of SE *** miRNA-Let-7i agomir and antagomir effectively regulated the levels of *** particular,the agomir significantly reduced the degree of SE and prolonged the latent period of SE,whereas the antagomir increased the degree of seizures and shortened the latent *** addition,the agomir significantly decreased the frequency of action potentials,while the antagomir significantly increased *** staining and TUNEL assays demonstrated that the agomir increased the survival and decreased the apoptosis,while the antagomir had the opposite *** addition,a Toll-like receptor 4(TLR4)inhibitor rescued the effects of antagomir on SE behavior and expression of IL-6 and TNF-α.Similar results on miRNA-Let-7i expression and effects of TLR4 inhibition were found in brain tissues of TLE ***:The miRNA-Let-7i−TLR4 regulatory pathway is involved in SE,which provides insights into the pathogenesis of SE.

关键词： miRNA-let-7i Status epilepticus TLR4 Apoptosis

Sewage sludge ditch for recovering heavy metals can improve crop yield and soil environmental quality

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Frontiers of Environmental Science & Engineering 2021年第2期15卷 65-75页

作者： Xianke Lin Xiaohong chen Sichang Li yangmei chen Zebin Wei Qitang Wu Key Laboratory of Soil Environment and Waste Reuse in Agriculture of Guangdong Higher Education Institutes College of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642China Key Laboratory of the Pearl River Estuarine Dynamics and Associated Process Regulation Ministry of Water ResourcesPearl River Hydraulic Research InstitutePearl River Water Resource CommissionGuangzhou 510611China

The treatment and disposal of municipal sewage sludge(MSS)is an urgent problem to be resolved in many *** using the nutrients within MSS to increase crop yield and enhance the fertility of poor soil could contribute to achieving sustainable *** indirect use of MSS in ditches alongside Pennisetum hybridum plants was studied in field plots for 30 months and the contents of heavy metals and macronutrients were monitored in soil,sludge and plant *** found that the yield of *** was significantly increased by 2.39 to 2.80 times and the treated plants had higher N content compared with no *** addition,the organic matter(OM)and N contents in the planted soil increased significantly compared with the initial *** OM content in the planted soil of the MSS treatment was 2.9 to 5.2 times higher than that with no sludge,and N increased by 2.0 to 3.8 ***,MSS had no significant effect on the N,P and K contents in the soil at the bottom of the MSS ditch,and the content of heavy metals(Cd,Pb,Cu and Zn)were also within the safe ***,the moisture content and phytotoxicity of MSS after this indirect use were reduced and the heavy metal contents changed little,which is favorable to the further disposal of recovered ***,this indirect use of MSS is beneficial to agricultural production,soil quality and environmental sustainability.

关键词： Municipal sewage sludge Indirect use Heavy metals Macronutrients Pennisetum hybridum

Research progress on the prediction of post-stroke epilepsy

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Acta Epileptologica 2020年第1期2卷 200-207页

作者： Shangnan Zou yangmei chen Chongqing Medical University Chongqing 400016China. The Second Affiliated Hospital of Chongqing Medical University Chongqing 400000China.

Epilepsy is a common neurological disease that not only causes difficulties in the work and life activities of patients,but also brings complex social *** disease is currently the main cause of epilepsy in the *** the increased survival rate of patients after stroke,the incidence of epilepsy after stroke has also *** prediction of epilepsy after stroke is extremely crucial for the prognosis of patients,the initiation of antiepileptic therapy and the reduction of epileptic *** this review,we summarize and compare the current models for the prediction of epilepsy after stroke,including the SeLECT prediction model,Post-Stroke Epilepsy Risk Scale(PoSERS),CAVE score,electroencephalogram(EEG)prediction model,and Scandinavian Stroke Scale(SSS)score,in order to provide reference for clinical practice and future *** models can be selected based on the clinical classification of cerebrovascular *** SeLECT score prognostic model is a better choice for ischemic stroke,especially for the exclusive prediction of mild post stroke *** CAVE score model is suitable for intra-cerebral hemorrhage *** is simple and offers high correlation between the risk factors and *** PoSERS score simultaneously predicts ischemic and hemorrhagic stroke,and is superior to other methods in specificity as well as positive and negative prediction *** SSS score,which only measures stroke severity,is not strictly considered as a mature predictor,but it can be used as a first step screening tool.A growing number of large studies are under the way to identify risk factors of poststroke epilepsy(PSE)and to improve the inclusion of predictive *** and advanced findings by EEG recordings may further improve the prediction of PSE.

关键词： Post-stroke Epilepsy SeLECT PoSERS CAVE Scandinavian stroke scale score Electroencephalogram

A Study on the Biocompatibility of MgO Coating Prepared by Anodic Oxidation Method on Magnesium Metal

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Journal of Bionic Engineering 2020年第1期17卷 76-91页

作者： yangmei chen Xugang Lu Fenghua Zhao Yi Hu Shibing Xiong Yuqiang Guo Ping Huang Bangcheng Yang Engineering Research Center in Biomaterials Sichuan UniversityChengdu 610064China National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China Sichuan Guojia Biomaterials Co. LtdChengdu 610064China Jiangsu Collaborative Innovation Center of Biomedical Functional Materials Nanjing Normal UniversityNanjing 210046China Panzhihua International Research Institute of Vanadium and Titanium Panzhihua UniversityPanzhihua 617000China

Magnesium(Mg),is widely used for the bone repair in oral and orthopedic application due to excellent bioactivity,degradation and ***,the range of application is greatly limited because of the rapid degradation of Mg metal in the *** modification is an effective method to enhance the corrosion resistance and reduce the degradation rate of Mg *** the present study,pure Mg metal(P-Mg)was subjected to alkali-heat treatment(AT-Mg)or anodic oxidation-heat treatment(AO-HT-Mg).Both AT-Mg and AO-HT-Mg had a layer of MgO on their surfaces after *** the effects of MgO coating on corrosion resistance,bioactivity,Mesenchymal Stem Cells’(MSCs)proliferation,adhesion and osteogenic differentiation,and the bone repair capability of Mg metal were *** found both AT-Mg and AO-HT-Mg had stronger corrosion resistance than *** on both AT-Mg and AO-HT-Mg had higher expression of proteins and genes of ALP,OCN,Col-I and Runx2 than those on *** also showed better bone repair property than P-Mg in *** general,MgO layer formed by anodic oxidation-heat treatment had better resistance and biocompatibility than that produced by alkali-heat *** study indicated the MgO coating not only improved the corrosion resistance of Mg metal,but also promoted the osteogenic differentiation of MSCs and bone regeneration.

关键词： magnesium MgO coating alkali-heat treatment anodic oxidation-heat treatment corrosion resistance biomedical-materials

Seizures and epilepsy secondary to viral infection in the central nervous system

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Acta Epileptologica 2020年第1期2卷 93-100页

作者： Peng Zhang Yuting Yang Jialin Zou Xinrui Yang Qiankun Liu yangmei chen Department of Neurology The Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China

Viral infection in the central nervous system(CNS)is a common cause of seizures and *** symptomatic seizures can occur in the context of almost all types of acute CNS viral ***,late unprovoked seizures and epilepsy may not be frequent after viral infection of the *** incidence of seizures and epilepsy after CNS viral infection is mainly dependent on the brain region of *** remains to be determined whether treatment of CNS viral infection using antiepileptic drugs(AEDs)can prevent seizures and subsequent epilepsy in patients,particularly with regard to the timing,drug choice and dosage,and duration of *** postoperative outcome of seizures in patients with intractable epilepsy caused by viral encephalitis primarily depends on the epileptogenic *** addition,neuroinflammation is known to be widely involved in the generation of seizures during CNS viral infection,and the effects of anti-inflammatory therapies in preventing seizures and epilepsy secondary to CNS viral infection require further *** this review,we discuss the incidence,mechanisms,clinical management and prognosis of seizures and epilepsy secondary to CNS viral infection,and summarize common CNS viral infections that cause seizures and epilepsy.

关键词： Seizures Epilepsy Viral infection Central nervous system