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Distribution of serotonin and FMRF-amide in the brain of Lymnaea stagnalis with respect to the visual system

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Zoological Research 2012年第3期33卷 1-12页

作者： Oksana P.TUCHINA Valery V.ZHUKOV Victor b.meyer-ROCHOW School of Engineering and Science Jacobs UniversityBremen D-28759Germany Department of Agricultural and Soil Ecology Faculty of Bioresources and Natural UsageKaliningrad State Technical UniversityKaliningrad 236000Russia Department of biology Oulu UniversityOuluSF 90300 Finland

Despite serotonin’s and FMRF-amide’s wide distribution in the nervous system of invertebrates and their importance as neurotransmitters,the exact roles they play in neuronal networks leaves many *** mapped the presence of serotonin and FMRF-amide-immunoreactivity in the central nervous system and eyes of the pond snail Lymnaea stagnalis and interpreted the results in connection with our earlier findings on the central projections of different peripheral *** the chemical nature of the intercellular connections in the retina of *** is still largely unknown,we paid special attention to clarifying the role of serotonin and FMRF-amide in the visual system of this snail and compared our findings with those reported from other *** least one serotonin-and one FMRF-amidergic fibre were labeled in each optic nerve,and since no cell bodies in the eye showed immunoreactivity to these neurotransmitters,we believe that efferent fibres with somata located in the central ganglia branch at the base of the eye and probably release 5HT and FMRF-amide as *** labelling revealed retrograde transport of neurobiotin through the optic nerve,allowing us to conclude that the central pathways and serotonin-and FMRF-amide-immunoreactive cells and fibres have different locations in the CNS in *** chemical nature of the fibres,which connect the two eyes in ***,is neither serotoninergic nor FMRF-amidergic.

关键词： Gastropoda Nervous system Retina Visual projections Retrograde transport Immunocytochemistry Neurotransmitters

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程序设计的构造性方法的基础

电子计算机动态 1981年第8期 1-6页

作者： b.meyer 刘宽名

本文分析了程序设计中一些最基本的和有生产力的问题;对这些问题的理解和应用将有助于程序员认识典型情况去构造程序。

关键词：不变式概念思维形式数学分析矩阵构造性方法构造程序定义域算法模式转换函数本征值特征值序列方程程序员

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硬质合金铣刀的选择和使用

工具技术 1965年第10期 1-9页

作者： K.Schmalz b.meyer 王守安

本文讨论了合理选择和使用硬质合金铣刀的若干问题;介绍了几种硬质合金铣刀的结构、几何参数、安装型式和刀刃切入时的接触方式。

关键词：端铣刀主轴铣床铣削传动轴金属切削刀具耐用度铣刀头刀刃切削速度切削用量刀齿数

砷化镓材料中EPR“As_(Ga)”的退火行为

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Journal of Semiconductors 1990年第3期11卷 221-226页

作者：汪光裕邹元燨 S.benakki E.Christoffel A.Goltzene b.meyer C.Schwab 中国科学院上海冶金研究所 Centre de Recherches Nucleaires Universite Louis Pasteur

本文比较了中子辐照。压缩变形和原生LEC砷化镓等三种不同来源样品的EPR“As_(Ga)”的Hamiltonian参数。并系统地研究了EPR“As_(Ga)”的浓度和低温光猝灭行为随退火温度的变化,从而进一步验证了EPR“As_(Ga)”的本性,即除孤立As_(Ga)... 详细信息

本文比较了中子辐照。压缩变形和原生LEC砷化镓等三种不同来源样品的EPR“As_(Ga)”的Hamiltonian参数。并系统地研究了EPR“As_(Ga)”的浓度和低温光猝灭行为随退火温度的变化,从而进一步验证了EPR“As_(Ga)”的本性,即除孤立As_(Ga)反位原子外,还可能包括As_(Ga)的一些空位络合物。这些不同本性的EPR“As_(Ga)”缺陷及其它有关的缺陷在样品热处理过程中可能相互转化。按照物理化学中Le Chatlier原理,缺陷的原始浓度和晶体内部应变能似应是引起这些转化反应的重要因素。

关键词：砷化镓电子顺磁共振退火点缺陷

新规则法律与秩序不能忽视的知识产权五大问题

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电子商务 2002年第1期 80-83页

作者： Jason b.meyer ,张云中

从历史上看，有关知识产权的法 “律演变非常之缓慢。但自从有了互联网之后，一切都变了──根据摩尔定律，事物正以加速度方式快速发展。从沸沸扬扬、至今尚未停息的有关Ｎａｐｓｔｅｒ网上音乐下载，到亚马逊有争议的专利要求──包... 详细信息

从历史上看，有关知识产权的法 “律演变非常之缓慢。但自从有了互联网之后，一切都变了──根据摩尔定律，事物正以加速度方式快速发展。从沸沸扬扬、至今尚未停息的有关Ｎａｐｓｔｅｒ网上音乐下载，到亚马逊有争议的专利要求──包括“一次点击下单”，目前在法院打的各种官（共4页)

关键词：联邦法庭国家结构审判庭财产权知识产权智力成果权专利权专利

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全球土地利用与土地覆被变化:进行综合研究

人类环境杂志 1994年第1期23卷 91-95页

作者： b.L.TurnerⅡ William b.meyer David L.Skole 陈百明克拉克大学乔治.珀金斯沼泽研究所新罕布什尔大学地球海洋和空间研究所

人类活动正以空前的速度、幅度和空间规模改变着陆地环境。人类对土地的利用所引起土地覆被变化是全球环境变化的主要原因和重要组成部分。目前不仅有关土地利用和土地覆被变化的全球性数据比较缺乏,而且我们还需要更为深入地了解造成... 详细信息

人类活动正以空前的速度、幅度和空间规模改变着陆地环境。人类对土地的利用所引起土地覆被变化是全球环境变化的主要原因和重要组成部分。目前不仅有关土地利用和土地覆被变化的全球性数据比较缺乏,而且我们还需要更为深入地了解造成这些变化的基本驱动力。虽然到目前已经提出了多种具有显著作用的驱动力,但对土地改变的单因素解释已证明是不够的。人类引起变化的原因是如何相互作用,在什么环境下某个因素的作用是重要的,这些都是需要系统研究的问题。当前正通过一些密切相关的研究重点而制定一项阐明这些问题的国际性跨学科规划。根据环境的一般状态、人类驱动力和土地覆被动态,将世界划分成几部分,然后对每部分的状态下发生的各种作用过程进行仔细研究。其成果将成为共同努力开发的全球土地模型的基础,该土地模型能对土地改变模式做出预测。

关键词：土地利用土地覆被地球土地模型

The role of extracorporeal life support and timing of repair in infants with congenital diaphragmatic hernia

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World Journal of Pediatric Surgery 2024年第2期7卷 90-99页

作者： Daniel b Gehle Logan C meyer Tim Jancelewicz Le bonheur Children's Hospital University of Tennessee Health Science CenterMemphisTennesseeUSA

Extracorporeal life support(ECLS)serves as a rescue therapy for patients with congenital diaphragmatic hernia(CDH)and severe cardiopulmonary failure,and only half of these patients survive to *** costly intervention has a significant complication risk and is reserved for patients with the most severe disease physiology refractory to maximal cardiopulmonary *** contraindications to ECLS do exist such as coagulopathy,lethal chromosomal or congenital anomaly,very preterm birth,or very low birth weight,but many of these limits are being evaluated through further *** guidelines from the past decade vary in recommendations for ECLS use in patients with CDH but this therapy appears to have a survival benefit in the most severe subset of *** outcomes have been observed for patients treated at high-volume *** review details the evolving literature surrounding management paradigms for timing of CDH repair for patients receiving preoperative *** recent data support early repair following cannulation to avoid non-repair which is uniformly fatal in this *** ECLS runs are associated with decreased survival,and patient physiology should guide ECLS weaning and eventual decannulation rather than limiting patients to arbitrary run *** of care across centers is a major focus to limit unnecessary costs and improve short-term and long-term outcomes for these complex patients.

关键词： congenital life repair

Effect of Al_(2)O_(3)on the Mechanical Properties of(b_(4)C+Al_(2)O_(3))/Al Neutron Absorbing Materials

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Acta Metallurgica Sinica(English Letters) 2024年第8期37卷 1411-1420页

作者： J.X.Cai b.M.Shi N.Li Y.Liu Z.G.Zhang Y.N.Zan Q.Z.Wang b.L.Xiao Z.Y.Ma Shi‑Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Nuclear Equipment Division Beijing Institute of Nuclear EngineeringChina Nuclear Power Engineering Co.Ltd.Beijing 100840China Department of Materials Science School of Mechanical EngineeringShenyang UniversityShenyang 110044China

b_(4)C/Al composites are widely utilized as neutron absorbing materials for the storage and transportation of spent nuclear *** order to improve the high-temperature mechanical properties of b_(4)C/Al composites,in-situ nano-Al_(2)O_(3)was introduced utilizing oxide on Al powder *** this study,the Al_(2)O_(3)content was adjusted by utilizing spheroid Al powder with varying diameters,thereby investigating the impact of Al_(2)O_(3)content on the tensile properties of(b_(4)C+Al_(2)O_(3))/Al *** was found that the pinning effect of Al_(2)O_(3)on the grain boundaries could hinder the recovery of dislocations and lead to dislocation accumulation at high *** the result,with the increase in Al_(2)O_(3)content and the decrease in grain size,the high-temperature strength of the composites increased *** finest Al powder used in this investigation had a diameter of 1.4μm,whereas the resultant composite exhibited a maximum strength of 251 MPa at room temperature and 133 MPa at 350℃,surpassing that of traditional b_(4)C/Al composites.

关键词： Al matrix composites Neutron absorbing materials (b_(4)C+Al_(2)O_(3))/Al composites High-temperature strength

Rare earth-doped mixed Ni-Cu-Zn ferrites as an effective photocatalytic agent for active degradation of Rhodamine b dye

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Journal of Rare Earths 2024年第3期42卷 488-496,I0003页

作者： Swapnil A.Jadhav Sandeep b.Somvanshi Sudarshan S.Gawali Kranti Zakde K.M.Jadhav Department of Physics Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad431004MaharashtraIndia School of Materials Engineering Purdue UniversityWest Lafayette 47906USA University Department of basic and Applied Sciences MGM UniversityAurangabad431003MaharashtraIndia

In this study, a series of Gd^(3+)-doped mixed Ni-Cu-Zn ferrites with composition of Zn_(0.5)Ni_(0.3)Cu_(0.2)Fe_(2-x)Gd_(x)O_(4)(x = 0, 0.025, 0.05, 0.075, 0.1) was prepared using self-ignition sol-gel method. The prepared nanoparticles with an average size ranging from 22 to 26 nm show a single-phase cubic structure belonging to the spinel matrix. A rise in the Gd^(3+)concentration leads to an increase in crystallite size and lattice parameter. In Fourier transform infrared spectra, two main absorption bands belonging to the spinel structure are observed. The high-frequency bands(v_(1)) represent the tetrahedral complex, while the lowfrequency bands(v_(2)) signify the octahedral complex. The optical bandgap of the nanoferrites is found within the range of 2.91 to 2.41 eV, depending on their size. The magnetic characteristics of the material,such as saturation magnetization and coercivity are significantly altered with the concentration of Gd^(3+)in the solution. Using Rhodamine b(Rhb) as a model organic pollutant, an in-depth investigation of the photocatalytic activity of the compounds was carried out. The present outcomes show that adding an adequate amount of Gd^(3+)significantly enhances the number of hydroxyl radicals produced by the ferrite,in turn, increasing the photocatalytic activity of the material. Mechanism elucidated by scavenger studies reveals that ·OH and holes are the primary reactive radicals responsible for the degradation *** photocatalysts show an insignificant performance loss in five consecutive cycles. Thus, it is concluded that these photocatalysts are highly suitable for the remediation of dye-contaminated wastewater.

关键词： Gd^(3+)substitution Spinel ferrite Structural properties Magnetic properties Photocatalysis Rare earths