O dia mais feliz da minha vida: a entrada na universidade segundo os alunos recém-ingressos no curso de Pedagogia da UFRN(2004.1)

The present work, based on the methodological principles of the Comprehensive Discourse Analysis, aimed, through the speech of twelve newly arrived students at the Pedagogy course of the Federal University of Rio Grande do Norte, to understand the moment students start university. It also aimed to analyze the relationship between the schools they were coming from and university entrance as well as the relationship between university and their new students. In the first part of the work, which focused on school knowledge, a comprehensive listening of the speeches of the students led primarily to a distinction, established by the students, between public and private schools, a distinction especially based on the view of superiority of private schools against public ones. The abovementioned interpretation is found in the discussion of the structural duality of Brazilian education which, historically, offers different pedagogical appliances among students of more priviledged social classes and those who come from lower levels of society. The overcome of this duality, aspired by the Brazilian Constitution of 1988, was stopped by the advent of a new economic model neoliberalism, which reinforced the differences between public and private when it prioritized the market on the economic, political and social relations, including educational projects. Impoverishment of public institutions and pauperization of the work of professors affected also the relationship between teachers and studens at the current institution. This is how the teacher becomes the greatest villain at the public management system. All of these references concerning differences in the quality of teaching at public and private schools, expressed by the students interviewed, however, were centered in the preparation for the entrance exam, called vestibular, thus showing a view that the relationship between the student and the school he came from is of a propedeutic kind and even so, reduced to a preparation for an entrance exam. In the second part of the work, which analyzed the relationship between newly arrived students and their university, it was noticed that the latter represents a whole new world. This world is seen as the change at the student´s social statute for now he is grown, takes more responsibilities and is socially respected. This change of attitude established by society and the discovery of a new world which requires more independence from the students, creates in them feelings of pride and fear and they feel insecure when it comes to making decision in the campus because now their decisions deliver a greater load of responsibility. This is when students understand they need to develop autonomy, which is seen, in this work, as the capacity to make conscious decisions. Nevertheless students expressed an understanding of autonomy as something that comes as a gift for those who enter university and not as a process that is constructed from social experiences. For these students, the need to be autonomous refers to the relationships with their teachers and the search for information. This search, however, is also related, according to interviews, to public school financial cuts, which penalize university, and to the lack of employers

Stomach content records of albacore (Thunnus alalunga) and bluefin tuna (Thunnus thynnus) in the North Atlantic Drift Region focusing on the Bay of Biscay between 2004 and 2011

The tuna stomach database from AZTI-Tecnalia corresponds to 7 years of sampling from 2004 to 2011. Due to the absence of continuity in the different projects dealing with the feeding ecology of tunas, the sampling could not be performed every year for both species, and no sample was collected in 2008. However, the fish stomach content record contents composition - by prey weight - of 1525 albacore caught in the Bay of Biscay and surrounding waters of the North Atlantic Drift Region in 2005 (n=397), 2006 (n=196), 2007 (n=37), 2009 (n=95), 2010 (n=566) and 2011 (n=234) ; and of 686 bluefin tunas caught in the Southeastern Bay of Biscay in 2004 (n=32), 2005 (n=36), 2006 (n=3), 2009 (n=257), 2010 (n=233) and 2011 (n=125). Samples have been obtained from scientific research surveys (using a variety of different fishing gears), from commercial fisheries catches, from individual fish voluntarily sampled by recreational fishermen and from fish accidentally stranded on coastlines. Each predator is identified by an ID and its length and wet weight are given. In case the wet weight could not be measured, it was estimated through a length-weight relationship equation and is indicated in the comment for the Predator mass column. The total weight of each prey is given, as well as the weight of each prey taxonomic group in each stomach.

Panama City Fisheries Resources Office: FY 2004 Annual Report

HIGHLIGHTS FOR FY 2004 1. Completed the second of a 3-year Gulf sturgeon population estimate on the Escambia River, Florida. 2. Completed the first of a 2-year Gulf sturgeon population estimate on the Apalachicola River, Florida. 3. Conducted Gulf sturgeon presence-absence surveys in three other Florida river systems. 4. Documented Gulf sturgeon marine habitat use in the near shore waters of the Gulf of Mexico. 5. Identified environmental threats to Gulf sturgeon spawning habitat in the Choctawhatchee River, Florida. 6. Initiated a study to document Gulf sturgeon spawning with the collection of fertilized eggs in the Yellow River, Florida. 7. Implemented Gulf Striped Bass Restoration Plan by coordinating the 21st Annual Morone Workshop, leading the technical committee, transporting broodfish, and coordinating the stocking on the Apalachicola-Chattahoochee-Flint (ACF) river system. 8. Over 86,000 Phase II Gulf striped bass were marked with sequential coded wire tags and stocked in Lake Seminole and the Apalachicola River. Post-stocking evaluations were conducted at 31 sites. 9. Drafted updates to Apalachicola-Chattahoochee-Flint Striped Bass Restoration and Evaluation Five-Year Plan with partners. 10. Fishery surveys were conducted on Tyndall Air Force Base and St. Marks and St. Vincent National Wildlife Refuges. 11. Habitat evaluations and population surveys were completed at 153 Okaloosa darter stream sites. 12. Aquatic insect biomonitoring and identification of over 39,000 individual aquatic macroinvertebrates was completed and provided to Eglin Air Force Base. 13. Ten years of fishery data from Okefenokee and Banks Lake National Wildlife Refuges was analyzed with recommendations incorporated into the refuge Comprehensive Conservation Plan. 14. A draft mussel sampling protocol was tested in wadeable streams in northwest Florida and southwest Georgia. 15. Implemented recovery plan and candidate conservation actions for 14 listed and candidate freshwater mussels in the Northeast Gulf Watersheds. 16. Worked with partners in developing the Spring Creek Watershed Partnership in the Flint River basin, Georgia. 17. Multiple stream restoration and watershed management projects were initiated or completed. A total of 6.8 stream miles were restored for stream fishes, along with 56.4 miles of coastline were enhanced for sea turtle lighting. A total of 135 acres of wetlands and 58 acres of understory habitat were restored. 18. Multiple outreach projects were completed to detail aquatic resources conservation needs and opportunities. Participated in National Fishing Week event, BASS ProShops event, several festivals, and school outreach.

1.36Tbit/s spectral slicing source based on a Cr4+:YAG femtosecond laser

We report a novel OTDM/WDM source based on spectral slicing of a passively mode-locked Cr4: YAG femtosecond pulse source. Total capacities up to 682Gbit/s and 1.36bit/s with spectral efficiencies of 0.2b/s/Hz and 0.4b/s/Hz have been achieved. © 2003 Optical Society of America.

1.3 m GaInNAs 量子阱激光器器件物理基础研究

Submitted by zhangdi (zhangdi@red.semi.ac.cn) on 2009-04-13T11:45:31Z

铁系催化剂聚合1，3-双烯烃的研究

1，2-聚丁二烯和3，4-聚异戊二烯是制造高性能轮胎的原料。本论文研究了以含磷化合物为第三组份的铁催化剂合成1，2-聚丁二烯和3，4-聚异戊二烯的反应规律：1．以二乙基亚磷酸酷为第三组份的铁催化剂可在己烷中，较高温度（50℃）下聚合1，3-丁二烯。通过控制催化剂组份的配比，可制备间同和无规1，2-聚丁二烯。所得间同1，2-聚丁二烯的1，2-结构含量为91％，间规度为90％；所得无规1，2-聚丁二烯的硫化胶具有优异的抗干、湿滑性能。2．以三苯基磷酸酷为第三组份的铁催化剂是合成高间同1，2一聚丁二烯的高效催化剂。所得聚合物具有高的1，2-结构含量（ca.95％），高的间规度（ca.95％）。聚合物的微观结构与催化剂组成等反应因素无关。3．以二烷基亚磷酸醋为第三组份的铁催化剂可在己烷中，较高温度（50℃）下聚合异戊二烯。二烷基亚磷酸醋中烷基影响聚合活性的顺序为乙基一甲基＞正丁基＞异辛基。所得聚异戊二烯的3，4（含1，2）结构含量保持在60％左右，不受反应条件的影响。4．改性甲基铝氧烷（MMAO）活化的铁催化剂聚合异戊二烯，在相当低的MMAO用量下（Al／Fe=20，摩尔比）即有高的催化活性。溶剂影响聚合活性的顺序为甲苯＞环己烷＞己烷＞二氯甲烷。所得聚异戊二烯的3，4（含1，2）结构含量稳定在60％。

1,5-二氮杂戊二烯合成非对称联吡啶研究

联吡陡及其衍生物不仅用于化工和药物合成的中间体，而且具有独特的赘合作用，可被用于金属催化剂配体等方面，因此它的合成方法研究引起了人们广泛的兴趣。但是非对称联吡陡的合成日前方法仍很少。本文利用己经被成功使用于其他含氮杂环的二碳合成子-1，5-二氮杂戊二烯（vinamidiniulnsalts），合成了单取代的2，2'-，2，3'-，2，4，一二类联吡陡。在合成1，5-二氮杂戊二烯的过程中：确立了一条以四甲氧基丙烷为原料一步合成l，5一二氮杂戊二烯的简捷，经济，易工业化的合成路线，并成功进行了公斤级的放大实验；优化了1，5-二氮杂戊二烯的亲电取代反应，高收率的获得溟代，硝化的1，5-二氮杂戊二烯；优化了从取代乙酸合成p取代1，5-二氮杂戊二烯的合成方法，高收率的获得九种p芳基取代1，5-二氮杂戊二烯。本文研究了非对称联吡睫合成的一种新方法：在碱性条件下，取代的1，5-二氮杂戊二烯盐各种乙酞基吡陡亲核加成的产物，不经分离直接和氨进行［3＋2＋1〕的成环反应，可以高收率的合成出单取代的2，2气，2，3气，2，4气三类联吡陡。这一方法己经被成功的应用于芳基取代，卤素取代，硝基取代以及无取代基的1，5-二氮杂戊二烯与三种乙酞基吡陡的反应。这种成环反应的收率与1，5-二氮杂戊二烯俘位的吸电子特征相关。因此，针对不同取代基的1，5-二氮杂戊二烯在溶剂，碱的选择以及反应温度的控制等方面进行了优化。从而成功合成出近30种单取代的非对称联吡陡。一这种合成方法，原料价格低廉，实验操作简单，而且收率高，非常适合大量合成的要求。

1,4-二氢吡啶衍生物的电化学行为

用电化学方法研究了影响 1,4 二氢吡啶类衍生物中 1,4 二氢吡啶的电化学行为的因素。结果表明 ,有机溶剂的偶极矩对 1,4 二氢吡啶电化学行为的影响最大 ,有机溶剂中含水量也有很大的影响 ,1,4 二氢吡啶上取代基的吸电子性也在一定程度上影响它的电化学性能

1-苯基-3-甲基-4-苯甲酰基-吡唑酮-5与中性磷(膦)萃取剂协同萃取镧B

研究了 1 苯基 3 甲基 4 苯甲酰基 -吡唑酮 5 (HPMBP)和中性有机磷 (膦 )类萃取剂Cyanex 4 71X(TIBPS ,B)在硝酸介质中对稀土元素La 的萃取 ,用斜率法和恒摩尔法探讨了萃取机理 ,确定了萃合物的组成为La(NO3 ) 2 ·PMBP·B ,计算了萃取平衡常数。比较了HPMBP与Cyanex 4 71X、Cyanex 92 1、Cyanex 92 3、Cyanex 92 5、DEH/EHP、P35 0及TBP的单独及混合体系萃取La 的性能 ,结果表明 :所有混合体系对La 均有协同效应 ,其中HPMBP与Cyanex 92 3、Cyanex 92 1、Cyanex 92 5的混合体系是萃取La 的有效体系。

聚对苯二甲酸1,3-丙二醇酯溶液浇铸薄膜形态结构

聚对苯二甲酸 1 ,3-丙二醇酯 ( PTT)是典型的半结晶聚合物 ,从熔体结晶形成球晶 ,在某一结晶温度范围内 ,在球晶中可观察到环带结构[1～ 4 ] .一般认为 ,环带球晶的形成归因于片晶沿球晶径向的周期性扭曲[1,2 ] .本文研究了 PTT溶液浇铸薄膜在溶剂挥发过程中等温结晶的形态结构 .1　实验部分　　 PTT样品为美国壳牌化学公司产品 ,熔点为 2 2 8℃ .将 PTT粒料于 1 1 0℃溶解在苯酚和1 ,1 ,2 ,2 -四氯乙烷 (质量比为 60∶ 40 )的混合溶剂中 ,配成质量分数为 0 .2 %～ 2 %的溶液 ,滴少许溶液在加热的云母片上 ,在预先设定的结晶温度 ( 90～ 2 0 0℃ )下等温结晶 ,然后将 PTT薄膜快速冷却至室温 .用 Leica DMLP偏光显微镜 ( PL M)和 SPA- HV30 0原子力显微镜 ( AFM)进行形态表征 .2　结果与讨论　　图 1为 PTT溶液浇铸薄膜在不同温度下等温结晶后的 PLM图 ,可以清楚地看到 Maltese十字消光现象 .PTT溶液浇铸薄膜在 90～ 1 30℃的结晶温度范围内 ,形成环带球晶 ;当结晶温度为 1 40℃...

一种用高效液相色谱分析1,3-二氨基硫脲的方法

一种用高效液相色谱分析１，３－二氨基硫脲的方法，选取Ｚｏｒｂａｘ－ＯＤＳ为色谱柱担体，用甲醇和水配制成移动相，在高效液相色谱仪上用紫外多波长检测器进行检测，以色谱外标法进行定量。本发明具有产品分析仪器化；分析结果误差小；分析过程快速，方便易操作；不仅可以检测１，３－二氨基硫脲产品的纯度，还可用于检测含有微量１，３－二氨基硫脲的溶液及废液中１，３－二氨基硫脲的含量的优点。

抗病、优质春小麦新品种--墨引1号和墨引2号

墨引1号(原代号99-22)、墨引2号(原代号99-36)是中国科学院西北高原生物研究所和青海省农业技术推广总站共同承担国家"948"项目即《国际玉米小麦改良中心(CIMMYT)春小麦新品种(系)引进和栽培试验研究》项目,通过引进、定向选育而成的两个春小麦新品种.这两个品种于2000～2003年参加青海省水地春小麦区域试验和生产试验,2004年2月19日通过青海省农作物品种审定委员会审定,分别定名为墨引1号、墨引2号.

常氧下高原鼠兔HIF-1α mRNA的表达

低氧诱导因子-1(HIF-1)是一种由低氧诱导因子-1α(HIF-1α)和芳香烃核受体转录因子(ARNT)组成的二聚体转录因子，在生物体氧平衡调节中起关键作用。高原鼠兔(Ochotona curzoniae)是生活在青藏高原海拔3000 m以上区域，有着极强的低氧、低温耐受能力的特有自然种群。它通过高的基础代谢率和高的氧利用率来适应高原低温、缺氧环境。将高原鼠兔带到北京，常氧室温条件下适应7 d。 RT-PCR扩增高原鼠兔HIF-1αcDNA片断，~（32）p标记作为特异性探针，Northern杂交检测了常氧条件下高原鼠兔HIF-1α的组织特异性表达。结果显示，HIF-1α mRNA在高原鼠兔多种组织中均有表达，并且表现出明显的组织差异性。其中脑的表达量最大，肾其次，心、脾和肝的表达相对较少。