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Denitrifying Bacteria in Paddy Soils of the Taihu Lake Basin,China

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Pedosphere 2004年第4期14卷 527-532页

作者： ZHANGhua-Yong LIzhen-Gao PANYing-hua LILiang-Mo InstituteofSoilScience ChineseAcademyofSciencesNanjing210008（China）.

This study attempted to determine the characteristics of the communities, the ecological factors, and the denitrifying enzyme activity for denitrifying bacteria found in the paddy soils of the Taihu Lake Basin, China. Samples of the six main soil types of the basin were taken from paddy fields with different fertilities. The total numbers of bacteria and denitrifying bacteria in the high fertility soils were much more than those in low fertility soils, and the number of denitrifying bacteria accounted for 49% to 80% of the total number of bacteria. The O2 content was an important ecological factor that affected denitrification. Of test the strains isolated from the paddy soils in the Taihu Lake Basin, some (e.g., Pseudomonas spp.) grew well under low oxygen partial pressure, while others (e.g., Bacillus spp.) had no strict predilection with O2 content. Another critical ecological factor was the nitrogen concentration. Three selected denitrifying bacteria grew better in aculture medium with 135 instead of 276mg L^-1 nitrogen. At the same time 67% of the test strains were able to reduce NO3^- to NO2^- and 56% had N2O reductase.

关键词：脱氮细菌生态特征酶活性稻田土壤

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中空型超声电机定子的有效机电耦合系数分析

振动．测试与诊断 2022年第6期42卷 1212-1219,1250页

作者：汪红星刘军朱华潘政阳南京航空航天大学机械结构力学及控制国家重点实验室南京210016

为了提高中空型超声电机的输出效率,对电机定子的有效机电耦合系数进行了研究分析。首先,利用等效电路法分析了电机定子的压电阻抗特性,确定了有效机电耦合系数的计算方法;其次,通过ANSYS软件对电机定子的压电阻抗特性进行了有限元仿真... 详细信息

为了提高中空型超声电机的输出效率,对电机定子的有效机电耦合系数进行了研究分析。首先,利用等效电路法分析了电机定子的压电阻抗特性,确定了有效机电耦合系数的计算方法;其次,通过ANSYS软件对电机定子的压电阻抗特性进行了有限元仿真,分析了定子的振动模态、金属弹性体和压电陶瓷的结构尺寸对有效机电耦合系数的影响;然后,根据仿真结果设计制作了4个不同的定子,并利用阻抗分析仪对4个定子进行了测试,实测值与仿真值进行对比,相对误差均小于10%,获得的阻抗特性曲线和仿真结果相吻合;最后,将4个定子装配成样机,并搭建了电机性能测试平台进行实验测试,4个样机均获得了较好的输出性能。实验结果表明,提高定子的有效机电耦合系数能获得较低的功耗,进而提高电机的输出效率,具有较高的工程应用价值。

关键词：中空超声电机压电阻抗特性有限元分析有效机电耦合系数输出性能

维普期刊数据库博看期刊

Particles accelerated in Hertzian magnetic dipole field of a pulsar

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Chinese Physics C 2021年第11期45卷 136-142页

作者：常哲朱庆华 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Supernova remnants are supposed to be the most possible sources of cosmic ***,alternative sources of cosmic rays,such as an active galactic nucleus,gamma-ray bursts,and pulsars,have not be *** this study,we investigate the possibility of cosmic rays being generated by *** pulsar is simply described as a rotational magnetic dipole,the so-called Hertzian magnetic dipole,an exact solution of the d'Alembert *** the rotational magnetic dipole field,charged particles experience an accelerated electric field with their radiation *** particles,which are initially static out of the light cylinder radius,can be accelerated up to a high energy.

关键词： pulsars cosmic rays acceleration of particles

Porcine Immunoglobulin Fc Fused P30/P54 Protein of African Swine Fever Virus Displaying on Surface of S. cerevisiae Elicit Strong Antibody Production in Swine

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Virologica Sinica 2021年第2期36卷 207-219页

作者： Chen Chen Deping hua Jingxuan Shi zheng Tan Min zhu Kun Tan Lilin Zhang Jinhai huang School of Life Sciences Tianjin UniversityTianjin 300072China

African swine fever virus(ASFV)infects domestic pigs and European wild boars with strong,hemorrhagic and high *** primary cellular targets of ASFV is the porcine *** to now,no commercial vaccine or effective treatment available to control the *** this study,three recombinant Saccharomyces cerevisiae(***)strains expressing fused ASFV proteins-porcine Ig heavy chains were constructed and the immunogenicity of the ***-vectored cocktail ASFV feeding vaccine was further *** be specific,the P30-Fcγand P54-Fcαfusion proteins displaying on surface of *** cells were produced by fusing the Fc fragment of porcine immunoglobulin IgG1 or IgA1 with p30 or p54 gene of ASFV *** recombinant P30-Fcγand P54-Fcαfusion proteins expressed by *** were verified by Western blotting,flow cytometry and immunofluorescence *** immunoglobulin Fc fragment fused P30/P54 proteins elicited P30/P54-specific antibody production and induced higher mucosal immunity in *** absorption and phagocytosis of recombinant *** strains in IPEC-J2 cells or porcine alveolar macrophage(PAM)cells were significantly enhanced,***,we introduce a kind of cheap and safe oral ***-vectored vaccine,which could activate the specific mucosal immunity for controlling ASFV infection.

关键词： African swine fever virus(ASFV) S.cerevisiae Porcine immunoglobulin Fc P30-Fcγ/P54-Fcαfusion proteins

LMSA:NVM环境下高性能动态图处理数据结构

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计算机学报 2022年第7期45卷 1446-1461页

作者：祝贺华强胜金海廖小飞大数据技术与系统国家地方联合工程研究中心武汉430074 服务计算技术与系统教育部重点实验室武汉430074 集群与网格计算湖北省重点实验室武汉430074 华中科技大学计算机科学与技术学院武汉430074

在过去十数年,来自网络与社交网络的图信息量在急剧增长,这种本质上动态变化的图对存储、分析与处理的实时性需求越来越高.新兴的非易失性内存(Non-Volatile Memory,NVM)技术具有高密度、高可扩展性和接近零待机功耗的优点,同时由于字... 详细信息

在过去十数年,来自网络与社交网络的图信息量在急剧增长,这种本质上动态变化的图对存储、分析与处理的实时性需求越来越高.新兴的非易失性内存(Non-Volatile Memory,NVM)技术具有高密度、高可扩展性和接近零待机功耗的优点,同时由于字节寻址等特性被认为是替代DRAM的潜在候选者,它们可以满足动态图信息快速增长的存储与处理要求.然而,由于NVM的硬件限制和数据一致性要求,传统动态图数据结构在NVM环境下效率低下.为了解决NVM环境下动态图数据结构存在的读写不对称和耐久性低等问题,本文设计与实现了层级合并排序数组(Level Merge Sorted Array,LMSA),它是一种支持在对数时间内同时完成读与写操作的动态图数据结构,它使用层级数组存储动态图中边信息来提升查询速度与减少因动态图数据结构性质维护而产生的写次数.为了低开销地保证数据一致性,LMSA利用无日志记录一致性方案进行插入、删除和更新等操作.在配置了英特尔傲腾持久内存DCPMM(Intel Optane DC Persistent Memory Module)机器上的实验结果表明,与最新的动态图数据结构Stinger和GraphTinker相比,LMSA插入操作吞吐量是Stinger的4.3~12.6倍,是GraphTinker的1.4~4.35倍,其删除操作吞吐量是Stinger的5.7~20.1倍,是GraphTinker的1.4~4.58倍.

关键词：动态图非易失性内存数据结构写优化崩溃一致性

Selective impairment of musical emotion recognition in patients with amnesic mild cognitive impairment and mild to moderate Alzheimer disease

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Chinese Medical Journal 2019年第19期132卷 2308-2314页

作者： Shan-Shan Zhou Xin Gao Ya-Juan Hu Yi-Ming zhu Yang-hua Tian Kai Wang Department of Neurology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui 230022China Department of Neurology The First People's Hospital of JiujiangJiujiangJiangxi 332000China Collaborative Innovation Centre of Neuropsychiatric Disorders and Mental Health HefeiAnhui 230032China Department of Medical Psychology Anhui Medical UniversityHefeiAnhui 230032China

Background:Patients with Alzheimer disease(AD)and amnesic mild cognitive impairment(aMCI)have deficits in emotion ***,it has not yet been determined whether patients with AD and aMCI also experience difficulty in recognizing the emotions conveyed by *** study was conducted to investigate whether musical emotion recognition is impaired or retained in patients with AD and ***:All patients were recruited from the First Affiliated Hospital of Anhui Medical University between March 1,2015 and January 31,*** the musical emotion recognition test,patients with AD(n=16),patients with aMCI(n=19),and healthy controls(HCs,n=16)were required to choose one of four emotional labels(happy,sad,peaceful,and fearful)that matched each musical *** recognition scores in three groups were compared using one-way analysis of variance(ANOVA)*** also investigated the relationship between the emotion recognition scores and Mini-Mental State Examination(MMSE)using Pearson’s correlation analysis test in patients with AD and ***:Compared to the HC group,both of the patient groups showed deficits in the recognition of fearful musical emotions(HC:7.88±1.36;aMCI:5.05±2.34;AD:3.69±2.02),with results of a one-way ANOVA confirming a significant main effect of group(F(2,50)=18.70,P<0.001).No significant differences were present among the three groups for the happy(F(2,50)=2.57,P=0.09),peaceful(F(2,50)=0.38,P=0.09),or sad(F(2,50)=2.50,P=0.09)musical *** recognition of fearful musical emotion was positively associated with general cognition,which was evaluated by MMSE in patients with AD and aMCI(r=0.578,P<0.001).The correlations between the MMSE scores and recognition of the remaining emotions were not significant(happy,r=0.228,P=0.11;peaceful,r=0.047,P=0.74;sad,r=0.207,P=0.15).Conclusion:This study showed that both patients with AD and aMCI had decreased ability to distinguish fearful emotions,which might be correlated with diminis

关键词： Mild cognitive impairment Alzheimer disease Musical emotion Melody recognition Brain network

Oral administration of Moringa oleifera leaf powder relieves oxidative stress,modulates mucosal immune response and cecal microbiota after exposure to heat stress in New Zealand White rabbits

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Journal of Animal Science and Biotechnology 2021年第4期12卷 1468-1482页

作者： Talat Bilal Yasoob Defu Yu Abdur Rauf Khalid zhen Zhang Xiaofeng zhu Heba M.Saad Suqin Hang National Center for International Research on Animal Gut Nutrition Nanjing Agricultural UniversityNo.1 WeiGangXuanwu regionNanjing 210095JiangsuChina Laboratory of Gastrointestinal Microbiology College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095China Faculty of Agricultural Sciences Ghazi UniversityDera Ghazi Khan 32200Pakistan Department of Livestock and Poultry Production Faculty of Veterinary SciencesBahauddin Zakariya UniversityMultan 60000Pakistan

Background:Heat stress(HS)disrupts the gut barrier allowing the uptake of lipopolysaccharide(LPS)and leads to an inflammatory response and changes in gut microbiota *** oleifera leaf powder(MOLP)has been proposed to combat HS,yet its alleviate role is currently under *** current study investigated the effects of chronic HS and MOLP supplementation on changes in redox status and immune response of cecal mucosa along with alteration in cecal ***:A total of 21 young New Zealand White(NZW)rabbits(male)about 32 weeks old(mean body weight of 3318±171 g)reared on a commercial pelleted diet were employed;divided into three groups(n=7):control(CON,25°C),heat stress(HS,35°C for 7 h daily),and HS supplemented orally with MOLP(HSM,35°C)at 200 mg/kg body weight per day for 4 ***:The results demonstrated that MOLP supplementation increased organ index of cecal tissue compared with the HS group(P>0.05).Levels of malonaldehyde(MDA)and activity of superoxide dismutase(SOD)as well as lactate dehydrogenase(LDH)were reduced in the cecal mucosa of the HSM group compared with the HS *** downregulated the contents of cecal mucosa LPS,several inflammatory markers(TNF-α/IL-1α/IL-1β),and myeloperoxidase(MPO)in the HSM group(P<0.05).Secretory immunoglobulin A(SIgA)was increased in the HSM group compared with the HS group(P<0.05).The transcriptome of cecal mucosa showed that MOLP reduced gene expression relative to several immune factors,including IL-10,IFNG,and RLA,whereas both HS and MOLP increased the gene expression of fat digestion and absorption pathway,including APOA1,FABP1,FABP2,MTTP,andLOC100344166,compared to the CON group(P<0.001).At the phylum level,the relative abundance of Proteobacteria was increased by HS,while Actinobacteria was significantly increased by HSM compared to other groups(P<0.05).At genus level,Papillibacter was higher in abundance in HSM groups compared to CON and HS groups(P<0.05).Higher butyrate conce

关键词： Cecal microbiota Heat stress Moringa oleifera leaf powder Rabbits Short chain fatty acids

Anomalous Emission And Carrier Effect of Fresh Porous Silicon

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Chemical Research in Chinese Universities 2002年第3期18卷 270-273页

作者： ZOU Bing-suo WU zhen yu CAO Li DAI Jian-hua XIE Si-shen WANG Jian ping Mostafa AEl-Sayed Optical Lab Institute of PhysicsChinese Academy of SciencesBeijing 100080P.R.China Laser Dynamics Laboratory School of Chemistry and BiochemistryGeorgia Institute of TechnologyAtlantaGA30332-0400

The emission and Fourier transformation infrared spectra of freshly prepared porous silicon(PS) and the silicon wafer were examined. Increasing temperature generally led to a decrease in the emission intensities of the PS samples, however, the freshly prepared sample showed an unusually large and sudden increase in its emission intensity at the specific temperature at which the hydrogen ion conductivity in the silicon wafer increased. The O-H vibrations of the silicon wafer also showed a sudden decrease at the same temperature. These results are consistent with the assumption that the luminescence of fresh PS comes from the carrier bound exciton in its confined nanostructure.

关键词： Porous silicon Silicon wafer Carrier effect

Role of adjuvant chemoradiotherapy in treatment of resectable esophageal carcinoma： a meta-analysis

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Chinese Medical Journal 2013年第6期126卷 1178-1182页

作者： zhenG Bin zhenG Wei zhu Yong LIN Xiao-yan XU Ben-hua CHEN Chun Department of Thoracic Surgery Department of Radiotherapy (Xu BH) Fujian Medical University Union Hospital Fuzhou Fujian 350001 China Department of Chemotherapy Department of Radiotherapy (Xu BH) Fujian Medical University Union Hospital Fuzhou Fujian 350001 China

Background The effectiveness and influence of surgery followed by adjuvant chemoradiotherapy （CRT） on the survival of patients with resectable esophageal carcinoma are still under debate. The outcomes of clinical trials have not been consistent. This study aimed to perform a meta-analysis of eligible published clinical trials to compare CRT with surgery without adjuvant chemoradiotherapy （non-CRT） for resectable esophageal carcinoma. Methods Computerized bibliographic and manual searches were undertaken to identify all eligible literature between 1990 and 2012. PubMed, EMBASE, Chinese National Knowledge Infrastructure, and Wanfang databases were our primary sources for published clinical trials. The quality of the methodology and reliability of the data from all of the clinical trials were assessed. All data were extracted by three independent researchers. Results Seven studies that included a total of 523 patients were selected. It was found that CRT significantly improved survival. The odds ratio （OR） in comparing CRT and non-CRT groups was 1.75 （95% confidence intervals （CI）： 1.17-2.60, P=0.006） for 1-year survival, 2.07 （95% CI： 1.45-2.96, P 〈0.0001） for 3-year survival, and 2.17 （95% CI： 1.45-3.26, P=0.0002） for 5-year survival. There have been no CRT treatment-related deaths reported in the literature. The incidence of related complications was high in the cases with CRT. Patients treated with CRT had a lower incidence of local-regional cancer recurrence （OR： 0.49, 95% CI： 0.31-0.76, P=0.002） and a similar incidence of distant cancer recurrence （OR： 0.90, 95% CI： 0.60-1.34, P=0.60）. Conclusions It was found that patients with resectable esophageal carcinoma could gain a survival benefit from CRT. However, CRT was associated with a high incidence of related complications.

关键词： esophageal carcinoma adjuvant treatment chemoradiotherap meta-analysis