检索结果-南通市图书馆

Preparation and radar-absorbing properties of Al2O3/TiO2/Fe2O3/Yb2O3 composite powder

International Journal of Minerals,Metallurgy and Materials 2017年第2期24卷 216-221页

作者： Yi-fan Zhang Zhen Ji Ke Chen Cheng-chang Jia Shan-wu yang meng-ya wang School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Al2O3/TiOe/FeeO3/Yb2O3 composite powder was synthesized via the sol-gel method. The structure, morphology, and ra- dar-absorption properties of the composite powder were characterized by transmission electron microscopy, X-ray diffraction analysis and RF impedance analysis. The results show that two types of particles exist in the composite powder. One is irregular flakes （100-200 rim） and the other is spherical A1203 particles （smaller than 80 rim）. Electromagnetic wave attenuation is mostly achieved by dielectric loss. The maximum value of the dissipation factor reaches 0.76 （at 15.68 GHz） in the frequency range of 2-18 GHz. The electromagnetic absorption of waves covers 2-18 GHz with the matching thicknesses of 1.5-4.5 mm. The absorption peak shifts to the lower-frequency area with increas- ing matching thickness. The effective absorption hand covers the frequency range of 2.16-9.76 GHz, and the maximum absorption peak reaches -20.18 dB with a matching thickness of 3.5 mm at a frequency of 3.52 GHz.

关键词： nanocomposites radar absorbing materials sol-gel processing electromagnetic wave attenuation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on the thermal deformation behavior and microstructure of FGH96 heat extrusion alloy during two-pass hot deformation

引用

International Journal of Minerals,Metallurgy and Materials 2019年第5期26卷 657-663页

作者： Bin Fang Gao-feng Tian Zhen Ji meng-ya wang Cheng-chang Jia Shan-wu yang School of Materials Science and Engineering University of Science and Technology Beijing Beijing Institute of Aeronautical Materials

The change rules associated with hot deformation of FGH96 alloy were investigated by isothermal two-pass hot deformation tests in the temperature range 1050–1125°C and at strain rates ranging from 0.001 to 0.1 s^(-1) on a Gleeble 3500 thermo-simulation machine. The results showed that the softening degree of the alloy between passes decreases with increasing temperature and decreasing strain rates. The critical strain of the first-pass is greater than that of the second-pass. The true stress–true strain curves showed that single-peak dynamic recrystallization, multi-peak dynamic recrystallization, and dynamic response occur when the strain rate is 0.1, 0.01, and 0.001 s^(-1), respectively. The alloy contains three different grain structures after hot deformation: partially recrystallized tissue, completely fine recrystallized tissue, coarse-grained grains. The small-angle grain boundaries increase with increasing temperature. Increasing strain rates cause the small-angle grain boundaries to first increase and then decrease.

关键词： FGH96 super-alloy two-pass hot deformation microstructure grain orientation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Deciphering the population structure and genetic basis of growth traits from whole-genome resequencing of the leopard coral grouper(Plectropomus leopardus)

引用

Zoological Research 2024年第2期45卷 329-340页

作者： Shao-Xuan Wu Qi-Fan Zeng Wen-Tao Han meng-ya wang Hui Ding Ming-Xuan Teng Ming-Yi wang Pei-Yu Li Xin Gao Zhen-Min Bao Bo wang Jing-Jie Hu MOE Key Laboratory of Marine Genetics and Breeding College of Marine Life Sciences/Key Laboratory of Tropical Aquatic Germplasm of Hainan ProvinceSanya Oceanographic InstitutionOcean University of ChinaQingdaoShandong/SanyaHainan 266100/572025China Hainan Seed Industry Laboratory SanyaHainan 572025China Southern Marine Science and Engineer Guangdong Laboratory GuangzhouGuangdong 511458China

The leopard coral grouper(Plectropomus leopardus)is a species of significant economic *** artificial cultivation of *** has thrived in recent decades,the advancement of selective breeding has been hindered by the lack of comprehensive population genomic *** this study,we identified over 8.73 million single nucleotide polymorphisms(SNPs)through whole-genome resequencing of 326 individuals spanning six distinct ***,we categorized 226 individuals with high-coverage sequencing depth(≥14×)into eight clusters based on their genetic profiles and phylogenetic ***,four of these clusters exhibited pronounced genetic differentiation compared with the other *** identify potentially advantageous loci for ***,we examined genomic regions exhibiting selective sweeps by analyzing the nucleotide diversity(θπ)and fixation index(FST)in these four *** these high-coverage resequencing data,we successfully constructed the first haplotype reference panel specific to *** achievement holds promise for enabling high-quality,***,we combined low-coverage sequencing data with imputation techniques for a genome-wide association study,aiming to identify candidate SNP loci and genes associated with growth traits.A significant concentration of these genes was observed on chromosome 17,which is primarily involved in skeletal muscle and embryonic development and cell ***,our detailed investigation of growth-related SNPs across the eight clusters revealed that cluster 5 harbored the most promising candidate SNPs,showing potential for genetic selective breeding *** findings provide a robust toolkit and valuable insights into the management of germplasm resources and genome-driven breeding initiatives targeting ***.

关键词： Plectropomus leopardus Whole-genome resequencing Growth Haplotype reference panel Single nucleotide polymorphisms

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of geniposide on learning and memory impairments in sleep deprivation model rats

Effects of geniposide on learning and memory impairments in ...

引用

2019中国生理学会学术年会暨张锡钧基金第十五届全国青年优秀生理学学术论文交流会及第十三届全国青年生理学工作者学术会议

作者：曹静 meng-ya wang Cell electrophysiology Laboratory Wannan Medical College

Objective: This study aims to investigate the effects of geniposide on learning and memory impairments in sleep-deprived model ***: Fifty adults SD male rats randomly divided into five groups: control(n=9), model(n=10),model+low-dose(n=9, geniposide 10 mg/kg, po, qd, 7 days), model + middle-dose(n=9, geniposide20 mg/kg), and model + high-dose(n=9, geniposide 40 mg/kg) groups, The sleep deprivation model rats were prepared by touching the cage and changing the cage,during 7 consecutive *** water maze test was employed to observe the learning and memory functions of rats in each ***:(1)The escape latency of the model rats was significantly longer than that of control group rats(P<0.01), The escape latency of geniposide groups at the low-,middle-and the high-dose groups was significantly shorter than that in the model group(P<0.05, P<0.01, P<0.01,respectively).There was significant difference among high-,middle-and low-dose groups(P<0.05).(2)Compared with the control group, the number of cross-platform in the model group decreased significantly(P<0.01).compared with the model group, the number of cross-platform in the geniposide high-, middle-and low-dose groups was significantly increased(P<0.01, P<0.01 and P<0.05).And the number of cross-platform in high-dose group was more than that in low-dose group(P<0.05).Conclusion: These preliminary results suggest that geniposide may improve learning and memoryfunctions in sleep-deprived model rats.

关键词： Sleep deprivation geniposide learning memory

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

引用

中国神经科学学会第十二届全国学术会议

作者： Yuan FANG Yun wang meng-ya wang School of Dentistry Wannan Medical College Cell Electrophysiology Laboratory Wannan Medical College

Objective To explore the static and dynamic occlusion contact and electrical characteristics of the asymptomatic patients with abnormal temporomandibular joint vibration, and to analyse the relationship between temporomandibular joint vibration and mandibular movement related factors. Methods Fourteen asymptomatic patients with abnormal temporomandibular joint vibration were selected through clinical examination and JVA joint vibration analyzer（male 6 cases, female 8 cases, mean age 19.79 + 2.22 years）. Moreover, occlusal contact and electromyography（EMG） signal features of subjects in intercuspal position（ICP）, and in border movements like mandibular protrusion and left-right laterals were recorded synchronously using the T-Scan III occlusion analysis system and Bio EMG III EMG analysis system. Besides, the results were compared and analyzed with those from 21 symptomatic patients with abnormal joint vibration and 35 normal subjects. Results Differences in asymmetry index of occlusal force, disocclusion time, laterotrusive interference, premature contact and masticatory muscle EMG amplitude between asymptomatic patients with abnormal joint vibration and normal control group were statistically significant（P＜0.05）. But differences in all indexes were not statistically significant compared with those from symptomatic patients with abnormal joint vibration（P＞0.05）. Conclusion Asymptomatic patients with abnormal temporomandibular joint vibration have poor occlusion stability, high occlusion interference, and early contact rates. Masticatory muscle function has declined at the time of ICP bite, while abnormal masticatory muscle contraction is more like to occur in border movement.

关键词： Temporomandibular disorder Joint vibration Electromyogram Occlusal contact

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Relations of alcohol-drinking behavior to alcohol knowledge,social support and life events of college students

Relations of alcohol-drinking behavior to alcohol knowledge,...

引用

中国神经科学学会第十届全国学术会议

作者： Gui-Hua ZHOU Bang-An wang meng-ya wang Cell Electrophysiology Laboratory Wannan Medical College

Objective To investigate the current situation of alcohol-drinking behavior and its relations to the awareness of alcohol knowledge,social support and life events of college students,and to provide the preventive strategy of alcohol-drinking problems in college *** By using a random sampling method,565 college students from9 faculties of 2 universities were involved in an anonymous survey including "A General Knowledge of Drinking Behavior Questionnaire", "Social Support Rating Scale（SSRS）", "Life Event Scale（LES）".The relationship among drinking behavior and its impacting factors,social support,Ufe events was *** The survey showed that 70.1%of college students were alcohol drinkers,and 61.2%of males with drinking frequency of 6-12 times were significantly more than 38.8%of females with that of less than 6 times per *** addition to a crucial impact of parents’ attitude and drinking behavior on student drinking behavior,a positive correlation between student drinking behavior and physical exercise was statistically ***,the difference of drinking expectancy between boys and girls,and the awareness of alcohol-related knowledge were significantly different *** multiple logistic regression analysis assessed the interaction between college student drinking behavior and the awareness of alcohol-related *** The preliminary results suggest that drinking behavior of college students is related to social support and life events,and gender,family environment and school environment are affecting factors as well.

关键词： alcohol-drinking behavior college student social support life event

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Synaptic responses of motoneurons evoked by electrical stimulation of the ipsilateral pericentral canal zone in spinal cord in vitro

Synaptic responses of motoneurons evoked by electrical stimu...

引用

中国神经科学学会第十届全国学术会议

作者： Wen QIN Chao ZHENG Bang-An wang meng-ya wang Cell Electrophysiology Laboratory Wannan Medical College

Objective To explore the characteristics of the synaptic transmissions from the ipsilateral pericentral canal(iPCC) zone to motoneurons(MNs) in neonatal rat spinal cord *** The intracellular recording techniques were performed in MNs of spinal cord slices isolated from neonatal rats(8-14 days old),and electrical stimulation of the iPCC zone was applied to evoke the synaptic *** Among 12 MNs tested,excitatory postsynaptic potentials(EPSPs),inhibitory postsynaptic potentials(IPSPs) and EPSP followed by IPSP were elicited by iPCC stimulation(iPCC-EPSPs or iPCC-IPSPs) in 9,1 and 2 MNs,*** iPCC-EPSPs and iPCC-IPSPs were sensitive to low Ca/high Mg solution or tetrodotoxin and presented with stimulus intensity-dependent and membrane potential-dependent *** iPCC-EPSPs were only partially eliminated by the perfusion of D-APV(30umol/L),and DNQX(1 μmol/L),while iPCC-IPSPs were completely nullified by application of bicuculline(30 μmol/L)and strychnine(1 μmol/L).Conclusion These preliminary results suggest that the activation of the iPCC zone may modulate the activities of MNs in neonatal rat spinal cord by excitatory or inhibitory synaptic *** addition to glutamatergic receptors,the other receptor mechanism such as cholinergic receptors may be involved to mediate the iPCC-EPSPs.

关键词： synaptic transmission motor neurons glutamatergic receptors cholinergic receptors

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The technique of patch-clamp recording on acutely isolated spinal anterior horn neurons

The technique of patch-clamp recording on acutely isolated s...

引用

中国神经科学学会第十二届全国学术会议

作者： Ling-Yun GAO Chao ZHENG meng-ya wang Cell Electrophysiology Laboratory Wannan Medical College

Objective To establish the technique of patch-clamp recording on acutely isolated spinal anterior horn neurons for more systematical and deeper study on various receptors and their distributions, classifications and the functional mechanisms of related modulators or drugs, independent of presynaptic components. Methods Lumbosacral laminectomy was performed on SD rats（6-11 d） after anesthesia. Then the lumbosacral spinal cord was removed and transverse slices were prepared. Posterior horn of the slice was cut off after digestion with Papain. Patch-clamp recording was then performed on mechanically dissociated anterior horn neurons. Results（1） Dissociated anterior horn neurons had characteristic morphology with a fusiform, triangular, or polygonal soma and broad dendrites emanating from the poles.（2） Electrophysiological parameters of spontaneous firings of the dissociated neurons（n=7）: resting potential,（-61.88±6.31） m V;threshold,（-47.39±3.03） m V;spike amplitude,（55.79±6.49） m V;overshoot,（8.39±2.91） m V;firing frequency,（13.54±3.77） Hz.（3） The amplitudes of 1 mmol/L glutamateinduced currents recorded in 8 anterior horn neurons were（344.71±36.56） p A, the average equilibrium potentials（EGlus） were（16.35±4.62） m V;The amplitudes of 2 mmol/L nicotine-induced currents in 8 anterior horn neurons were（296.91±27.38） p A, the average equilibrium potentials（ENics） were（29.06±5.26） m V. Conclusion The wholecell patch-clamp recording technique on acutely isolated spinal anterior horn neurons we established is feasible and can be applied to investigate receptors and their distributions,classifications and functional mechanisms underlying related modulators or drugs.

关键词： spinal cord acute isolation anterior horn neuron patch-clamp recording neonatal rat

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Effects of transcranial direct current stimulation on movement function of Parkinson's disease model mice

Effects of transcranial direct current stimulation on moveme...

引用

中国神经科学学会第十二届全国学术会议

作者： Peng-Yu wang ya-Xin Deng Jie Fang meng-ya wang Hong-Ping Huang Ring Star group Wannan medical college Department of physiology and neurobiology Wannan medical college

Objective Parkinson’s disease(PD) is a common degenerative disorder of the central nervous system in elderly people. At present, the main methods to treat PD are drug therapy, surgical treatment, cell transplantation, diet guidance, life and psychological care. Transcranial direct current stimulation(t DCS) has been widely used in recent years due to its non-invasive and effective properties. However, the mechanism of the optimal stimulation pattern of t DCS on neuroregulation for PD therapy is unclear. Methods Male C57 BL/6 J mice were intraperitoneal injected by 1-methyl-4 phenyl-1,2,3,6-tetrahydropyridine hydrochloride(MPTP,30 mg/kg/2 h, continuously for 4 times, 2 h interval for each time) to establish PD model mice. Behavioral observation and lower limb electromyography(EMG) signals were recorded. t DCS treatment(stimulation current intensity: 1 m A, duration: 1 min per time, for 4,8,12 times, interval: 5 min) was performed 24-48 h after the establishment of the mice model. Results PD model mice showed climbing pole time extension(P < 0.01)in pole test, decreased vertical and horizontal scores(P < 0.01)in open-field test, and increased total power and average cycle amplitude of EMG signal(P < 0.05). t DCS treatment can reverse increased total power and average cycle amplitude of EMG signal(P < 0.05), which can be more effective in the 12 times t DCS treatment group mice among the 3 different t DCS patterns treatment. Conclusion The experiment data provides evidences to study the mechanism of the optimal stimulation pattern of t DCS treatment of PD.

关键词： Parkinson’s disease transcranial direct current stimulation mice electromyography

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Aminoguanidine improved the cognitive function of model mice with early type 2 diabetic

Aminoguanidine improved the cognitive function of model mice...

引用

中国神经科学学会第十二届全国学术会议

作者： Jie FANG ya-Xin DENG Peng-Yu wang Xi CHEN De-Cui SHAO meng-ya wang Cell Electrophysiology Laboratory Wannan Medical College Rising-Star Group Wannan Medical College

Objective In recent years, the patient number of type 2 diabetes mellitus（T2 DM） has been increasing rapidly in many countries. It seriously affects patients’ life span. T2 DM can damage almost all of organ systems, including nervous system, leading to cognitive decline. Therefore, we aim to investigate whether aminoguanidine（AG） can improve the cognitive function in early T2 DM, and explore the possible role of AMPA receptors. Methods KM mice were randomly divided into 3 group（Control group, DM group and AG group）. Mice were fed with high fat diet（HFD） for 4 weeks and then injected with a single dose streptozotocin（STZ, 120 mg/kg,ip）. Four weeks later, the mice in AG group were treated with AG by gavage for 2 weeks. The remained mice were treated with normal saline. All of animals were evaluated by the platform test after treatment. The changes of neurons were observed by HE staining and the levels of AMPA receptors（Glu R1 and Glu R2） in hippocampus were detected by Western blot method. Results（1） The latency of control group and AG group were longer（P ＜0.01） compared to DM group.（2） The error numbers of control group or AG group were less than DM group（P ＜0.01 or P ＜0.05）.（3） The cytoplasmic reduction, pyknosis of nuclei and disorganized arrangement of cells were observed by HE staining in DM group.（4） Surprisingly, Western blot showed that the protein levels of Glu R1 and Glu R2 were increased in DM group, which could be reduced by AG treatment. Conclusion These preliminary results indicate that AG may improve the cognitive functions of model mice with early T2 DM by the possible mechanism relating to the levels of AMPA receptors.

关键词： AMPA receptor Aminoguanidine Diabetes Cognitive impairment Hippocampus

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：