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Relation Between Endodormancy Induction and Changes in Two Main Electron Transport Pathways of Nectarine Buds

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Agricultural Sciences in China 2008年第10期7卷 1203-1209页

作者： yu qin GAO dong-sheng XU Xiao-ming LI Jin XU Chen-shan State Key Laboratory of Crop Biology College of Horticulture Science and Engineering Shandong Agricultural University Tai＇an271018. P.R.China

Operation regulations of two main electron transport pathways in nectarine （Prunus persica var. nectariana cv. Shuguang） buds during endodormancy induction were studied to understand possible roles which two main electron transport pathways played in the buds of deciduous fruit trees during endodormancy induction. Respiratory inhibitors （KCN and SHAM） were used to investigate total respiration rate （Vt）, the development and operation of the alternative pathway and partitioning of electrons between the cytochrome and alternative pathways in nectarine buds during endodormancy induction. Results indicated that changes of Vt in flower and leaf buds showed single and double hump-shaped curves, respectively. In endodormancy induction, the capacity （Valt,） and activity （ρValt） of the alternative pathway rapidly increased, but changes of them had different patterns during the entire measuration. At the same time, changes of engagements of the alternative （ρValt/Vt） and cytochrome pathway （ρ′Vcyt/Vt） were opposite, and ρ′Vcyt/Vt was always further higher than ρValt/Vt during the entire measuration. All these results indicated that the development and operation of the alternative pathway played important roles in endodormancy induction, but the cytochrome pathway was the main pathway for mitochondrial electron transport in buds during endodormancy induction.

关键词： nectarine buds endodormancy induction cytochrome pathway alternative pathway

THE EFFECT OF OIL CAVITY DEPTH ON TEMPERATURE FIELD IN HEAVY HYDROSTATIC THRUST BEARING

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Journal of Hydrodynamics 2011年第5期23卷 676-680页

作者： SHAO Jun-peng DAI Chun-xi ZHANG Yan-qin yu Xiao-dong XU Xiao-qiu WANG yun-fei College of Mechanical and Power Engineering Harbin UniverSity of Science and Technology Harbin150080 China

For a heavy hydrostatic bearing with a high linear velocity, the results of numerical calculations often differ from practical conditions if the viscosity is considered as constant. In this article, the influence of the oil cavity depth on the temperature field in the heavy hydrostatic bearing is discussed in the context of variable viscosity. The viscosity-temperature relations for the gap oil film are first established by fitting B-Spline curves, then, numerical calculations for the temperature field in the heavy hydrostatic bearing of different oil cavity depths are carried out based on Finite Volume Method （FVM） under the same rotating speed, and the influence of the oil cavity depth on the temperature distribution in the gap oil film of the hydrostatic bearing is discussed. The results of numerical calculations provide the temperature distribution state inside the hydrostatic bearing, which would help the selection and the design of hydrostatic bearings in engineering practice.

关键词： hydrostatic thrust bearing viscosity-temperature characteristic Finite Volume Method (FVM) temperature field

Induced neural stem cells regulate microglial activation through Akt-mediated upregulation of CXCR4 and Crry in a mouse model of closed head injury

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Neural Regeneration Research 2025年第5期20卷 1416-1430页

作者： Mou Gao qin dong Dan Zou Zhijun Yang Lili Guo Ruxiang Xu Department of Neurosurgery Sichuan Academy of Medical Sciences and Sichuan Provincial People’s HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengduSichuan ProvinceChina Department of Neurosurgery Chinese PLA General HospitalBeijingChina Department of Neurology Fu Xing HospitalCapital Medical UniversityBeijingChina

Microglial activation that occurs rapidly after closed head injury may play important and complex roles in neuroinflammation-associated neuronal damage and *** previously reported that induced neural stem cells can modulate the behavior of activated microglia via CXCL12/CXCR4 signaling,influencing their activation such that they can promote neurological ***,the mechanism of CXCR4 upregulation in induced neural stem cells remains *** this study,we found that nuclear factor-κB activation induced by closed head injury mouse serum in microglia promoted CXCL12 and tumor necrosis factor-αexpression but suppressed insulin-like growth factor-1 ***,recombinant complement receptor 2-conjugated Crry(CR2-Crry)reduced the effects of closed head injury mouse serum-induced nuclear factor-κB activation in microglia and the levels of activated microglia,CXCL12,and tumor necrosis factor-α.Additionally,we observed that,in response to stimulation(including stimulation by CXCL12 secreted by activated microglia),CXCR4 and Crry levels can be upregulated in induced neural stem cells via the interplay among CXCL12/CXCR4,Crry,and Akt signaling to modulate microglial *** agreement with these in vitro experimental results,we found that Akt activation enhanced the immunoregulatory effects of induced neural stem cell grafts on microglial activation,leading to the promotion of neurological recovery via insulin-like growth factor-1 secretion and the neuroprotective effects of induced neural stem cell grafts through CXCR4 and Crry upregulation in the injured cortices of closed head injury ***,these beneficial effects of Akt activation in induced neural stem cells were positively correlated with the therapeutic effects of induced neural stem cells on neuronal injury,cerebral edema,and neurological disorders post–closed head *** conclusion,our findings reveal that Akt activation may enhance the immunoregulatory effects of induced neura

关键词： Akt signaling cerebral edema closed head injury Crry CXCR4 induced neural stem cell microglia neuroinflammation

高校图书馆采编部消除图书积压的一种新办法——集体承包制

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农业图书情报学刊 2007年第3期19卷 53-54页

作者：于东琴山东师范大学图书馆济南250014

图书馆采编部图书积压一直是图书馆的一块心病,本文结合本馆的工作,找出了积压的原因及弊端,并提出了消除积压的对策。

关键词：采编工作集体承包制图书积压

视觉美学视域下文学在影视领域的话语互动——以《朗读者》为例对视觉美学话语互动的探讨

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科技视界 2019年第32期 223-224页

作者：于东琴山东师范大学图书馆

互联网与社会经济发展的深度融合,文学的视觉化转向明显。文学和电影作为两种不同的文化类型,既有其相关性又有其差异性。本文以《朗读者》为例,从文学和电影间关系的演变角度来探讨视觉美学视域下影视重构的话语跨越性、话语互动和跨... 详细信息

互联网与社会经济发展的深度融合,文学的视觉化转向明显。文学和电影作为两种不同的文化类型,既有其相关性又有其差异性。本文以《朗读者》为例,从文学和电影间关系的演变角度来探讨视觉美学视域下影视重构的话语跨越性、话语互动和跨学科交融性带来的影响。

关键词：视觉美学跨学科文学研究话语互动《朗读者》影视媒介

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参观沪宁图书馆有感

科技情报开发与经济 2007年第6期17卷 28-29页

作者：于东琴山东师范大学图书馆山东济南250014

分析了沪、宁两地不同类型图书馆的服务特色,结合工作实践,提出了普通图书馆改善服务和管理的思路。

关键词：图书馆图书馆管理资源共享

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室内加热器主要质量问题原因分析及改进建议

中小企业管理与科技 2019年第9期3卷 28-29页

作者：秦玉东山东省产品质量检验研究院济南250102

在人们的日常生活中,需要多种家用电器来提升室内居住环境质量,室内加热器就属于其中的一种。而室内加热器在进行正常使用过程中,会出现一些质量问题,影响到加热器性能的正常发挥。所以要对室内加热器所出现的安全质量问题进行分析,既... 详细信息

在人们的日常生活中,需要多种家用电器来提升室内居住环境质量,室内加热器就属于其中的一种。而室内加热器在进行正常使用过程中,会出现一些质量问题,影响到加热器性能的正常发挥。所以要对室内加热器所出现的安全质量问题进行分析,既能够使得室内加热器安全质量问题得到解决,同时又能够确保室内加热器在使用过程中的安全性。

关键词：安规检测室内加热器质量

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论大学生信息素质与智能培养

科技情报开发与经济 2007年第8期17卷 258-259页

作者：于东琴山东师范大学图书馆山东济南250014

分析了信息素质高低的判别标准,阐述了对大学生进行信息素质培养的重要性,提出了对大学生进行信息素质培养的途径。

关键词：大学生信息素质教育智能

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高校图书馆与创新人才的培养

科技情报开发与经济 2007年第12期17卷 107-108页

作者：于东琴山东师范大学图书馆山东济南250014

阐明了知识创新和信息素质的含义,分析了高校图书馆在信息素质教育、创新人才的培养中的优势及重要作用。

关键词：高校图书馆创新型人才信息素质教育