检索结果-南通市图书馆

Increased serotonin concentration and tryptophan hydroxylase activity in reproductive organs of copulator males:a case of adaptive plasticity

引用

Advances in Bioscience and Biotechnology 2011年第2期2卷 75-84页

作者： Ana Ingrid Pichardo Jose L.Tlachi-Lopez Francisco Jimenez-Trejo Alma L.fuentes-Farias Armida Baez-Saldana Maria L.Molina-Ceron Gabriel Manjarrez-Gutierrez Gabriel Gutierrez-Ospina Rosa Angelica Lucio departamento de Biologia Celular y Fisiologia Instituto de Investigaciones BiomedicasUniversidad Nacional Autonoma de MexicoCiudad Universitaria 04510MexicoD.F.Mexico Centro Tlaxcala de Biologia de la Conducta Universidad Autonoma de TlaxcalaCarretera Tlaxcala-Puebla km 1.5 s/nLoma Xicotencatl90062TlaxcalaMexico departamento de Farmacologia Facultad de MedicinaUniversidad Nacional Autonoma de MexicoCiudad Universitaria 04510MexicoD.F.Mexico Laboratorio de Invertebrados y Ecofisiologia Facultad de BiologiaUniversidad Michoacana de San Nicolas de HidalgoCiudad Universitaria 58030MichoacanMexico Unidad de Investigacion Biomolecular Hospital de CardiologiaCentro Medico Nacional Siglo XXIInstituto Mexicano del Seguro Social 06720MexicoD.F.Mexico

Individual male rats may systematically display or not copulatory behavior when paired with receptive females. Although these phenotypes are associated with differences in brain organization and function, they might also do so at the level of the reproductive organs. We then used high performance liquid chromatography to quantify serotonin concentration and the activity of tryptophan hydroxylase in the reproductive organs of copulator and non-copulator males. Sexual behavior display was compared between groups and parameters of fertility and reproductive fitness were determined for copulator males. Copulator males had higher concentrations of serotonin in the epididymis, testicle and ventral prostate than their non-copulator counterparts, as it was found for epididymal and testicular tryptophan hydroxylase activity. However, preliminary data shows that serotonin elevation occurs in copulator males only until they have accumulated several sexual encounters, so it might be a response to genital gratification or sexual rewarding. Interestingly, only epididymal serotonin concentration correlated with reproductive fitness, offspring number, mating success and seminal plug volume in copulator males. Our results support that copulator and non-copulator male rats feature a phenotype-specific serotoninergic tone in the epididymis, testicle and ventral prostate gland. The observation documenting that epididymal serotonin concentration correlated with parameters that monitor male fertility and reproductive fitness in copulator males predicts that epididymal factors increase their chances of parenting offspring.

关键词： Sexual Accessory Glands Copulation Indolamines Seminal Fluid Seminal Plug Successful Mating Reproductive Fitness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Marine turtle hatchlings use multiple sensory cues to orient their crawling towards the sea:biological and conservation policy implications

引用

Advances in Bioscience and Biotechnology 2011年第2期2卷 47-51页

作者： Alma Lilia fuentes-Farias Gabriel Gutierrez-Ospina Esperanza Melendez Herrera Veronica Camarena-Ramirez Gerardo Ochoa-Tovar Julieta Mendoza-Torreblanca Armida Baez-Saldana Raquel Martinez-Mendez Jaime Urrutia-Fucugauchi Maria Luisa Garcia Zepeda Laboratorio de Ecofisiologia Facultad de BiologiaUniversidad Michoacana de San Nicolas de HidalgoCiudad UniversitariaMorelia MichoacanMexico58230 Laboratorio de Biologia de Sistemas Instituto de Investigaciones BiomedicasUniversidad Nacional Autonoma de MexicoCiudad UniversitariaMexico D.F.04510 Laboratorio de Paleomagnetismo Instituto de GeofisicaUniversidad Nacional Autonoma de MexicoCiudad UniversitariaMexico D.F.04510 Laboratorio de Paleontologia Facultad de BiologiaUniversidad Michoacana de San Nicolas de HidalgoCiudad UniversitariaMorelia MichoacanMexico58230 Laboratorio de Neuromorfometría Instituto Nacional de PediatríaMéxico D.F.04530

The ability of sea turtle hatchlings to find the seashore soon after hatching is thought to be exclusively dependent upon visual information. Target-oriented movements in most vertebrates, however, relay on combining information gathered through different sensory systems. Hence, in this work, we investigated whether olfactory and/or magnetic information might complement visual cues during hatchling’s seaward crawling. Acute olfactory deprivation and distorted magnetic sensation in visually competent hatchlings resulted in a scattering of seaward crawling routes among cardinal points, some of them being different from those strongly preferred by control hatchlings. In addition, blindfolded hatchlings also displayed a striking misrouting while crawling on the beach surface in spite of having intact olfactory and magnetic senses. Together these results support the notion that visual information is crucial for seaward crawling, but also that olfactory and magnetic information complement visual cues when turtle hatchlings display this behavior. Hence, the present observations suggest that multisensory cues are used by turtle hatchlings while crawling towards the sea. This work also has important implications on the design of species conservation measures and policies. In the near future, efforts must be made to identify and preserve the local natural sources of odors and magnetic cues, in addition to preventing the perturbing effects of artificial lighting on adult and hatchling turtle crawling behavior.

关键词： Olfaction Magnetoreception Vision Chelonia aggasizi Seaward orientation Reptiles Intermodal interactions Multisensory integration

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Postural spinal balance defined by net intersegmental moments: Results of a biomechanical approach and experimental errors measurement

引用

World Journal of Orthopedics 2015年第11期6卷 983-990页

作者： Benjamin Blondel Elke Viehweger Bertrand Moal Patrick Tropiano Jean-Luc Jouve Virginie Lafage Raphael dumas Stéphane fuentes Gérard Bollini Vincent Pomero Laboratoire d’analyse du mouvement Spine UnitUniversité Aix-Marseille Ecole doctorale 463 Sciences du Mouvement HumainUniversité Aix-Marseille department of Spine Surgery Hospital for Joint DiseasesNew-York University Université de Lyon IFSTTAR LBMC Université Lyon 1 LBMC

AIM: To describe initial results and experimental error measurement of a protocol analyzing Human posture through sagittal intersegmental moments. METHOdS: Postural analysis has been recently improved by development of three-dimensional radiographic imaging systems. However, in various situations such as global sagittal anterior malalignment interpretation of radiographs may not represent the real alignment of the subject. The aim of this study was to present initial results of a 3d biomechanical protocol. This protocol isobtained in a free standing position and characterizes postural balance by measurement of sagittal intersegmental net moments. After elaboration of a specific marker-set, 4 successive recordings were done on two volunteers by three different operators during three sessions in order to evaluate the experimental error measurement. A supplementary acquisition in a "radiographic" posture was also obtained. Once the data acquired, joint center, length, anatomical frame and the center of mass of each body segment was calculated and a mass affected. Sagittal net intersegmental moments were computed in an ascending manner from ground reaction forces at the ankles, knees, hips and the lumbosacral and thoraco-lumbar spinal junctions. Cervicothoracic net intersegmental moment was calculated in a descending ***: Based on average recordings, clinical interpretation of net intersegmental moments(in N.m) showed a dorsal flexion on the ankles(8.6 N.m), a flexion on the knees(7.5 N.m) and an extension on the hips(8.5 N.m). On the spinal junctions, it was flexion moments: 0.34 N.m on the cervico-thoracic; 6.7 N.m on the thoraco-lumbar and 0.65 N.m on the lumbo-sacral. Evaluation of experimental error measurement showed a small inter-trial error(intrinsic variability), with higher inter-session and inter-therapist errors but without important variation between them. For one volunteer the "radiographic" posture was associated to significant changes compared

关键词： Posture Sagittal alignement Biomechanical evaluation Intersegmental net moments

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

注意缺陷多动障碍患者应该如何从中枢兴奋剂切换至托莫西汀治疗——一项比较快速切换方案和缓慢切换方案治疗效果的研究

注意缺陷多动障碍患者应该如何从中枢兴奋剂切换至托莫西汀治疗—...

引用

中华医学会第十次全国精神医学学术会议

作者： Esther Cardo Jalón Vibeke Porsda deborah Quai Joaquin fuentes Chris Steer Alonso Montoya Ernie Anand Rodrigo Escobar 吴胜虎 University of Balearic Island Palma de MallorcaSpain

目的比较儿童和青少年注意缺陷多动障碍(Attention deficit/Hyperactivitydisorder,AdHd)患者由中枢兴奋剂治疗快速或缓慢地切换至托莫西汀(atomoxetine,ATX)治疗的效果。方法采用随机、对照、开放式研究设计,入选6～16岁AdHd患者,既往...

目的比较儿童和青少年注意缺陷多动障碍(Attention deficit/Hyperactivitydisorder,AdHd)患者由中枢兴奋剂治疗快速或缓慢地切换至托莫西汀(atomoxetine,ATX)治疗的效果。方法采用随机、对照、开放式研究设计,入选6～16岁AdHd患者,既往使用中枢兴奋剂治疗,但因为治疗反应不理想和/或副作用而需切换至ATX治疗(快速切换方案是指中枢兴奋剂治疗2周后就切换至ATX治疗,而缓慢切换方案为中枢兴奋剂治疗10周后再换用ATX治疗)。研究周期为14周,ATX目标剂量为1.2～1.8mg/kg/d。主

关键词：

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

Value of relative cerebral blood volume measurement using perfusion MRI in glioma management

引用

中国神经肿瘤杂志 2008年第2期6卷 97-97页

作者： Metellus P dutertre G Mekkaoui C Nanni I fuentes S Ait- Ameur A Chinot O dufour H Figarella-Branger d Cordoliani YS Grisoli F département de neurochirurgie hospital la Timone264rue Saint-Pierre13005 Marseille cedex 05France

Neurochirurgie, 2008 Jun ***: Neoangiogenesis is a critical feature that can differentiate high- grade from low- grade glioma. Conven-tional MR imaging does not assess this histological feature accurately. The goal of this study was to evaluate the gain in rel-ative cerebral blood volume measurement using perfusion MRI in the management of cerebral gliomas. MATERIALS

关键词：神经胶质瘤诊断方法大脑血量

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

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

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

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：