mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
低温冷害对湖南晚稻危害特点及调控技术

系统分析了湖南35 a来晚稻低温冷害发生的特点及其危害,提出了选用抗寒力强的品种,适时播种,确保晚稻安全齐穗,科学排灌,以水保温等一系列防御对策,为避开规律性低温冷害对晚稻的影响,确保湖南晚稻高产提供参考.
早稻施用配方肥的增产效应研究

通过比较"强农"牌配方肥对望城县早稻的校正试验效应分析,发现配方施肥比习惯施肥及不施肥能改善水稻生产经济性状,显著提高水稻理论产量和实际产量,可以实现增产增收的目的.
教育视角下的益阳市农村人力资源开发对策研究

对益阳农村人力资源和农村人力资源开发的现状进行分析,针对益阳农村教育及农村人力资源开发中的问题,提出了益阳农村人力资源教育开发对策,以促进农村人力资源开发.
福建烤烟品种(系)区域试验研究

通过比较几个新育成烤烟品系田间生长表现及烤后烟叶产质量差异,发现8个试验品种(系)中,CF206、K-2产量、产值较好,高于对照K326;0601、K065产量和产值较差,整体效益表现为CF206>K-2>F209>K326>0507>F221>K06-5>0601.
普通烤房密集化改造对烟叶质量的影响

针对目前普通烤房在烟叶烘烤中存在的主要问题,将两种不同形式的密集化烤房改造方式与普通烤房进行了对比分析.结果表明:普通烤房密集化改造后有利于提高烟叶烘烤质量,烟叶的颜色加深,橘黄烟叶增多,色泽增强,叶片结构得到改善,弹性较好,烤后的烟叶化学成分更趋协调;同时降低了劳动强度和烘烤成本,增加了烟农的收入.
永顺县水稻"3415"肥料效应的研究

应用"3415"(三因素四水平15个处理)试验方案对永顺县水稻进行了肥料效应试验,通过对试验数据的三元二次回归分析表明,水稻产量与氮、磷、钾肥之间有显著的回归关系,F=2.352>F_(0.01)=0.261;经过边际产量和边际效应分析,分别得出最大产量施肥量是氮(N)=166.5 kg/hm~2,磷(P_2O_5)=75.0 kg/hm~2,钾(K_2O)=127.5 kg/hm~2,最大产量是6 921.0 kg/hm~2;最佳效益施肥量是N=139.5 kg/hm~2,P_2O_5=13.5 kg/hm~2,K_2O=166.5 kg/hm~2,最佳效益产量是6 846.0 kg/hm~2.而用一元二次回归分析结果与三元二次回归分析有较大差导.通过本试验还算出了肥料利用率、土壤养分校正系数等施肥参数.
不同覆盖方法对稻田免耕种植马铃薯产量的影响

稻田免耕种植马铃薯是近年发展起来的一项省工、省本、高产、高效新技术.通过采用不同覆盖物覆盖探讨对免耕稻田种植马铃薯产量的影响,结果表明,稻田免耕采用稻草覆盖种植马铃薯,比常规露地栽培明显增产,比地膜覆盖种植更方便、效益更好,值得推广.
Metabolic assessement of spleen infiltration by non-Hodgkin lymphoma using 18F-FDG PET/CT: Preliminary clinical results

18F-FDG PET/CT was used for evaluation of spleen infiltration in patients with B-cell non-Hodgkin lymphoma (NHL). Five patients with histological diagnosed B-cell NHL underwent 18F-FDG PET/CT examination. On integrated PET/CT image, spleen infiltration was considered when PET images revealed a discrete margin of solid splenic masses or diffuse lesion of spleen with higher maximum standardized uptake value (SUV) greater than those of normal liver structures. CT images demonstrating a positive splenic index (>480 mL) or focal hypodensities were classified as positive for spleen infiltration. All the patients underwent systemic chemotherapy. The 18F-FDG PET and CT results were compared with final diagnoses. All patients had spleen infiltration originating from B-cell NHL at final diagnosis. F'mal diagnoses, which were confirmed by clinical and CT (n=3) or 18F-FDG PET/CT (n=1) follow-up in 4 patients and biopsy of 1 patient. On integrated PET/CT image, 18F-FDGPET was true-positive in all 5 patients with spleen infiltration. CT was true-positive in 4 of the 5 patients with spleen infiltration and false-negative in 1 patients (spleen infiltration without morphology changes). The accuracies of 18F-FDG PET and CT for evaluating the spleen infiltration were 100% and 80% at staging, respectively. Our preliminary results suggested metabolic imaging of 18F-FDG PET/CT may be helpful in the diagnosis of spleen infiltration in B-cell NHL patients. These patients may benefit from 18F-FDG PET/CT in diagnosis, when spleen infiltration without morphology changes, which may not be diagnosed exactly by conventional image.
Preparation of cobalt nanoparticles by electron beam irradiation

Cobalt nanoparticles were synthesized by electron beam irradiation without any catalysts at room temperature and ambient pressure. The nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, vibrating sample magnetometer, and laser mattering particle size distribution analysis. Average size of the nanoparticles was about 32 nm with a narrow size distribution. Melting point of the nanoparticles was about 451.3 ℃.
盐酸乌拉地尔注射液治疗高血压危象40例疗效观察

高血压危象是指高血压患者在疾病发展过程中或在某些诱因的作用下血压突然升高,收缩压(SBP)>200mmHg,舒张压(DBP)>125mmHg,常伴心、脑、肾等重要器官功能损害,危及生命的一种临床综合征.乌拉地尔是一种高选择性α受体阻滞药,是用于治疗高血压危象的常用血管活性药物之一,我们于2005年5月至2008年6月采用乌拉地尔注射液治疗高血压危象患者40例,现将其临床疗效结果报告如下.
Comparative Detection of Calcium Fluctuations in Single Female Sex Cells of Tobacco to Distinguish Calcium Signals Triggered by in vitro Fertilization

Double fertilization is a key process of sexual reproduction in higher plants. The role of calcium In the activation of female sex cells through fertilization has recently received a great deal of attention. The establishment of a Ca~(2+)-imaging technique for living, single, female sex cells is a difficult but necessary prerequisite for evaluating the role of Ca~(2+) in the transduction of external stimuli, including the fusion with the sperm cell, to internal cellular processes. The present study describes the use of Fluo-3 for reporting the Ca~(2+) signal in isolated, single, female sex cells, egg cells and central cells, of tobacco plants. A suitable loading protocol was optimized by loading the cells at pH 5.6 with 2 μM Fluo-3 for 30 min at 30℃. Under theseconditions, several key factors related to in vitro fertilization were also investigated in order to test their possible effects onthe [Ca~(2+)]_(cyt) of the female sex cells. The results indicated that the bovine serum albumin-fusion system was superior to the polyethlene glycol.fusion system for detecting calcium fluctuations in female sex cells during fertilization. The central cell was fertilized with the sperm cell in bovine serum albumin; however, no evident calcium dynamic was detected, implying that a transient calcium rise might be a specific signal for egg cell fertilization.
Regulation of Actin Dynamics in Pollen Tubes: Control of Actin Polymer Level

Actin cytoskeleton undergoes rapid reorganization In response to internal and external cues. How the dynamics of actin cytoskeleton are regulated, and how its dynamics relate to its function are fundamental questions inplant cell biology. The pollen tube is a well characterized actin-based call morphogenesis in plants. One of the striking features of actin cytoskeleton characterized in the pollen tube is its surprisingly low level of actin polymer. This special phenomenon might relate to the function of actin cytoskeleton in pollen tubes. Understanding the molecular mechanism underlying this special phenomenon requires careful analysis of actin-binding proteins that modulate actin dynamics directly. Recent biochemical and biophysical analyses of several highly conserved plant actin-binding proteins reveal unusual and un-expected properties, which emphasizes the importance of carefully analyzing their action mechanism and cellular activity. In this review, we highlight an actin monomer sequestering protein, a barbed end capping protein and an F-actin severing and dynamizing protein in plant. We propose that these proteins function in harmony to regulate actin dynamics and maintain the low level of actin polymer in pollen tubes.
Karyomorphology of three species in Dipentodon (Dipentodontaceae),Perrottetia (Celastraceae), and Tapiscia (Tapisciaceae) of the order Huerteales and their phylogenetic implications

The karyomorphology of three species in Dipentodon (Dipentodontaceae), Perrottetia (Celastraceae), and Tapiscia (Tapisciaceae), namely Dipentodon sinicus, Perrottetia racemosa, and Tapiscia sinensis, was investigated in the present study. Recent molecular research has discovered close relationships among these three genera, which has led to the establishment of the order Huerteales with Perrottetia being placed in Dipentodontaceae. Herein we report the chromosome numbers of D. sinicus and P. racemosa for the first time, and present their karyotype formulas as 2n = 34 = 22 sm + 12 st (D. sinicus), 2n = 20 = 11 m + 9 sm (P. racemosa), and 2n = 30 = 22 m(2SAT) + 8sm (T. sinensis). Asymmetry of their karyotypes is categorized to be Type 3B in D. sinicus, Type 2A in P. racemosa, and Type 2A in T. sinensis. Each of the species shows special cytological features. Compared with Perrottetia, Dipentodon has a different basic chromosome number, a higher karyotype asymmetry, and different karyomorphology of its interphase nuclei, mitotic prophase, and metaphase. Thus, on the basis of these results, we have reservations regarding the suggestion of placing Dipentodon and Perrottetia together in the family Dipentodontaceae.
Analyses of Sexual Reproductive Success in Transgenic and/or Mutant Plants

The pistil, the female reproductive organ of plants, is a key player in the success of sexual plant reproduction. Ultimately, the production of fruits and seeds depends on the proper pistil development and function. Therefore, the identification and characterization of pistil expressed genes is essential for a better understanding and manipulation of the plant reproduction process. For studying the function of pistil expressed genes, transgenic and/or mutant plants for the genes of interest are used. The present article provides a review of methods already exploited to analyze sexual reproductive success. We Intend to sup ply useful information and to guide future experiments in thestudy of genes affecting pistil development and function.
肝癌肝移植受者的选择标准

肝细胞肝癌(简称肝癌)是肝移植的主要适应证之一,但肝移植术后肝癌的复发和转移严重制约了肝移植治疗的效果.如何降低移植术后肝癌的复发率和提高长期生存率成为各个移植中心非常关心的问题.对于肝癌肝移植受者的选择,世界上各个肝移植中心纷纷提出了各自的标准.
肌张力障碍研究的昨天、今天和明天

肌张力障碍(dystonia)是运动障碍病中很常见的一类疾病.目前,国内外学者对肌张力障碍的基础和临床研究的兴趣日趋增高,已在肌张力障碍的病因和发病机制、诊断及治疗研究方面不断取得新的进展乃至突破,传统的观念也不断面临着挑战.而究其病因,犹如遨游深邃的海洋.
细胞高浓度磁性标记导致细胞外大量纳米颗粒聚集物的形成

细胞移植在修复和替代受损器官、改善组织功能和基因治疗方面具有重要作用.活体细胞示踪是分子影像学的任务之一[1],能够实时监测移植细胞靶向迁移、迁移速度以及细胞在靶器官停留时间,有助于指导细胞移植技术在临床的合理应用.MRI具有组织和空间分辨率高、无放射损伤等优点,成为活体细胞示踪的重要研究手段.
左心室心尖部憩室超声表现1例

患者男,87岁.既往无心肌梗死病史,因高血压10余年,胸闷、浮肿10 d入院.心电图:T波改变,QT间期延长.超声心动图检查:左室心尖部呈囊袋状向外膨出(图1),直径约4.3cm,其壁与邻近心室壁相连,收缩活动明显减弱,并通过一较窄通道与心室相通,彩色多普勒示囊袋内血流方向紊乱,收缩期血流自囊袋进入左室腔,流速为1.23 m/s,舒张期血流自左室进入囊袋内,流速为3.69 m/s.超声诊断:左室心尖部憩室可能.后经MRI造影进一步证实.
Lutembacher综合征彩色多普勒超声心动图特征及规律性研究

Lutembacher综合征是一种少见的先天性心脏病.自1987年8月至2008年8月,我院共收治30例Lutembacher综合征患者,笔者对其彩色多普勒超声心动图(CDE)特征和规律性进行了研究,现报告如下.
岩溶动力学理论的发展与国际岩溶研究中心的成立

1990年至今,笔者带领的国土资源部岩溶动力学重点实验室研究群体连续成功申请与实施了与岩溶有关的IGCP299、IGCP379、IGCP448和IGCP513四个国际地质对比计划项目,为国际岩溶学术界同行提供了一起学习、工作机会,进而共同解决岩溶形成、碳循环、岩溶生态、水资源等领域的资源与环境问题.
初始误差和模式误差对ENSO集合预报的影响

基于作者发展的一个.ENSO(El Ni(n)io-Southern Oscillation)集合预报系统,利用4组14 a的(单一或集合)回报试验(试验方案按照是否在预报过程中考虑了初始或模式随机误差扰动进行划分),分别从确定性预报和概率预报角度,检验和探讨了随机的初始误差扰动和模式误差扰动对ENSO集合预报水平的影响.试验结果初步表明,主要体现了模式物理过程不确定性的随机模式误差扰动,能够在整个12个月预报过程有效地提高集合预报系统的预报水平.但是对该系统而言,随机初始误差扰动对预报水平的影响相对较小,其影响时效主要集中在预报的前3个月左右.
柔性染料敏化太阳能电池光阳极的制备及其应用

采用水热法将商用二氧化钛(P25)、无水乙醇和蒸馏水置于高压釜中搅拌分散,得到二氧化钛浆体.采用刮涂法在ITO/PEN衬底上低温制备了柔性光阳极和染料敏化太阳能电池,进行SEM,UV-vis,FTIR和电池光电性能等表征和测试,分析不同条件对柔性太阳能电池性能的影响.结果表明,在185℃高压釜中水热处理12 h制备的二氧化钛浆体,稳定性高,均匀性好.所组装的柔性染料敏化太阳能电池在100 mW/cm~2模拟太阳光照下,光电转换效率达到3.4%.
土壤湿度资料同化对中国东部夏季区域气候模拟的改进

采用牛顿张弛同化法把GSWP2资料同化进区域气候模式BCC_RegCM1.0(简称RegCM)中土壤湿度初始场,结果得到采用不同张弛参数对土壤湿度资料进行同化,均能不同程度的改进气温和降水的模拟,当张弛强度取0.5和张弛时间为5d时,对中国东部地区气温和降水模拟的改进效果较好.加入土壤湿度资料同化后,不仅对中国东部地区的降水和气温的空间分布型有所改进,而且修正了控制试验中地表气温的系统性冷偏差以及中国东部地区的降水偏少,使地表气温和降水的模拟值较控制试验结果接近于观测值,这说明RegCM对地面气温的偏低和降水量的偏少,可能与陆面过程中的土壤湿度处理有较大的关系,今后应注重RegCM中土壤湿度的作用.
硼掺入Mg(OH)_2过程中的硼同位素分馏

为确定B掺入Mg(OH)_2时的形式及掺入过程中硼同位素组成的变化,进行了不同设定pH(pH_(设定))的人工合成无Mg海水中B掺入Mg(OH)_2的实验.结果表明,B掺入Mg(OH)_2非常迅速,4 h能达到平衡,平衡后Mg(OH)_2中B浓度[B]_固和固相与溶液相间的分配系数K_d随pH_(设定)的升高而降低.而且最高的[B]_固和K_d均远高于B被金属氧化物或黏土矿物吸附时的对应值,表明B具有很强的掺入Mg(OH)_2的能力.平衡时溶液相的δ~(11)B_(液f)均低于原始溶液的δ~(11)B_(液i),计算的Mg(OH)_2与平衡溶液间的硼同位素分馏系数α_(固-液)变化范围为1.0186～1.0220,平均值为1.0203.这充分表明,B掺入Mg(OH)_2时~(11)B优先进入固相,这是B(OH)_3优先掺入的结果.B(OH)_3与Mg(OH)_2间的沉积反应是B(OH)_3掺入的直接原因.B(OH)_3与Mg(OH)_2间的沉积反应和B(OH)_4 ~-在Mg(OH)_2上吸附可能同时存在,并以沉积反应为主,它们决定了B掺入Mg(OH)_2时硼同位素特征.与B只以B(OH)_4 ~-形式掺入生物碳酸盐不同,B以B(OH)_3和B(OH)_4 ~-两种形式同时掺入Mg(OH)_2,并以B(OH)_3优先掺入为主,pH设定越低掺入的B(OH)_3比例越高.由于Mg(OH)_2普遍存在于石珊瑚中,这将严重影响珊瑚的硼同位素组成δ~(11)B与海水pH的定量对应关系,因此会给δ~(11)B作为古海水pH的代用指标带来极大的不确定性.
系列Fe(Ⅱ/Ⅲ)配位超分子的晶体结构及光电性能

采用水热合成方法得到了3种Fe(Ⅱ/Ⅲ)配合物:[Fe_2(μ2_-btec)(μ_2-H_2btec)(phen)_2(H_2O)_2]_n(1),[Fe_2(btec)(phen)_2(H_2O)_4](2),{[Fe(o-pha)(phen)(H_2O)]·H_2O}_n(3),(phen=1,10-phenanthroline,o-H_2pha=o-phthalic acid,H_4btec=1,2,4,5-benzenetetracarboxylic acid).X射线单晶衍射结果表明,配聚物(1)和配合物(2)都是以均苯四甲酸根做为桥,分别形成了1D和双核结构;配聚物(3)是以邻苯二甲酸根为桥形成了1D结构.3种配合物中羧基配位模式各不相同,在配合物(2)中,采用了μ_2-η~1η~1η~1η~1配位模式;配聚物(3)中,邻苯二甲酸根的两个邻位的羧基采用了比μ_2-η~2η~1模式;而配聚物(1)中均苯四甲酸根存在两种不同的配位模式,一种为μ_2-η~1η~1η~1η~1,另一种为两个对位羧基参与配位的μ_2-η~1η~1模式.此外,分子间大量氢键的存在和π-π堆积作用又将3个配合物分别网成了3D和2D无限结构.通过红外光谱(IR)、电子吸收光谱(UV-Vis-NIR)及表面光电压光谱(SPS)等方法对配合物进行了表征.重点分析了3种配合物的表面光电压光谱,结果表明,它们在300～600 nm范围内均有正的光伏响应,呈现出一定的P型半导体行为特征.而且由于3种配合物的结构、中心Fe离子的价态和Fe离子配位环境不同,使得3种配合物的SPS响应带的强度、位置和峰数都出现明显不同.此外,将SPS结果与其电子吸收光谱进行关联,发现它们基本上是一致的.
棉花原生质体"供-受体"双失活融合产生种间杂种植株及其鉴定

采用"供-受体"双失活融合模式,以陆地棉品系YZ-1原生质体为受体,以野生棉G.davidsonii原生质体为供体,开展不对称融合.融合前,陆地棉品系YZ-1原生质体经过0.5mmol/L碘乙酰胺(IOA)室温下处理20 min,野生棉G.davidsonii原生质体经过38.7 J/cm~2的紫外线(UV)处理30 s,能有效地抑制亲本原生质体的生长.将上述条件下分别钝化处理的双亲原生质体采用电诱导融合后进行培养,获得再生植株.对获得的杂种植株进行形态学、细胞学及分子标记检测.大部分再生植株表现出新形态,部分表现亲本中间型,少数偏向受体亲本.融合植株的染色体数目在40～73之间.随机扩增多态性DNA标记(RAPD)和简单重复序列(SSR)分析证实了再生植株的杂种真实性.而细胞质基因组的酶切扩增多态性序列(CAPS)和叶绿体SSR(cpSSR)分析结果显示,杂种的线粒体和叶绿体发生了重组.本研究是棉花中开展"供-受体"双失活融合模式的首次报道,是继对称融合和基于紫外线处理的不对称融合之后在棉花原生质体融合方面又一新的进展.
基于功能性标记和测序发掘携带有S_5~n基因的水稻新种质

水稻籼粳亚种间杂种具有强大的生物学优势,但杂种F_1普遍高度不育,难以直接利用.S_5~n基因可以克服由S_5基因座位互作引起的杂种不育性.目前S_5~n基因已被成功克隆,该基因功能区存在大片段的缺失DNA,为快速并准确发掘携带有S_5~n的水稻新种质提供基础.本文将S_5~n基因序列与日本晴相对应序列进行比对,在S_5~n基因缺失DNA的两端设计引物,对已知携带有S_5~n和不携带有S_5~n基因(但携带有S_5~i或S_5~j)的水稻材料进行PCR扩增检测,建立S_5~n基因的功能性标记.利用该标记对我国水稻微核心种质进行检测,其中有10个品种的S5座位中存在DNA片段缺失,这些品种可能携带有S5n基因.这些品种包括毫补卡、小红谷、老造谷、三磅七十箩、木邦谷、魔王谷内杂、饭毫皮、飞蛾糯2、包协-7B和特青选恢等,其中除三磅七十箩和老造谷外,其余的8个品种均未见报道携带有S_5~n基因.对存在缺失DNA的10个品种的扩增片段进行测序,发现全部品种S_5座位的缺失DNA片段都与02428和零轮(已知携带有S_5~n)的一致,说明这10个品种S_5座位的基因也是没有功能的,证明确实存在S_5~n基因.
祁连山中段黑河上游山区地表径流水资源主要形成区域的同位素示踪研究

通过对黑河干流上游祁连山区降水中δ~(18)O随海拔高度变化的研究,揭示出其变化具有显著的高程效应,高度梯度约为-0.18‰/100 m.利用同位素示踪技术,并结合出山口河水中δ~(18)O,认为出山径流主要形成于高海拔山区.应用"二分量模型",阐明了海拔3600 m以上的高山冰雪冻土带是黑河山区流域的主要产流区,产流量占出山径流量的80.2%.
青藏高原南部羊卓雍错流域稳定同位素水文循环研究

稳定同位素被广泛应用于湖相沉积中古气候重建以及区域水文循环研究.通过分析青藏高原南部羊卓雍错流域2年的降水、河水和湖水样品测得的氧稳定同位素结果,分析了其时空变化特征,并通过建立该流域湖水稳定同位素循环模型,模拟了不同环境因子对湖水中氧稳定同位素平衡过程的影响.研究结果表明,该流域中降水、河水和湖水δ~(18)O具有显著的季节和年际差别,同时,表现出明显的"季风循环".季风期,降水、河水和湖水δ~(18)O值较低;非季风期,降水和湖水δ~(18)O值较高,河水δ~(18)O值在春季较高.由于蒸发分馏作用,流域内湖水δ~(18)O比降水δ~(18)O和河水δ~(18)O高约10‰.模拟结果表明,湖水蒸发过程对于相对湿度的变化非常敏感,在湖面相对湿度为51%时,湖水δ~(18)O经过30.5年达到目前的-4.7‰水平.湖水表层水温和补给水δ~(18)O变化对湖水δ~(18)O平衡影响较小.
A fractional-N frequency synthesizer for WCDMA/Bluetooth/ZigBee applications

A triple-mode fractional-N frequency synthesizer with a noise-filter voltage controlled oscillator (VCO) for WCDMA/Bluetooth/ZigBee applications has been implemented in 0.18-μm RF-CMOS technology. The proposed synthesizer achieves a good phase noise lower than -80 dBc/Hz in band and -115 dBc/Hz @ 1 MHz for the three modes, and only draws 21 mA from a 1.8 V supply. It has a high hardware sharing and a small size, only 1.5 × 1.4 mm~2. The system architecture, circuit design, and measured results are also presented.
新型凸凹复合形曲面辊在调直切断机矫直系统中的研究与应用

本文针对钢筋调直切断机的调直转筒中,采用的凹形曲面辊存在一系列缺陷作了分析,对改进后的设计结构作了全面说明,为提高切断机的工作质量提供有效方法.
基于WillCC和S7-300 PLC的单晶硅提拉生长控制系统

随着计算机技术的飞速发展,越来越多的由通用型计算机和工控组态软件产品组成的系统被应用于工业等领域的关键系统中.文章讲述了西门子S7-300PLC及SIMATIC WinCC在单晶硅提拉生长系统中的应用,有效的解决了复杂对象的控制问题.在分析单晶硅提拉生长工艺的基础上,给出了系统的硬件配置,介绍了系统的软件设计.据生产现场的反馈信息表明,该系统人机界面友好、操作简便可靠,非常适合单晶硅提拉生长行业使用.
磁流变液磁饱和强度测定装置的设计

为了研制一种简单可靠的测量磁流变液磁饱和强度的仪器,本文根据电磁学相关原理从三个方面即理论推导、参数的设定和计算、计算校核对测试装置的工作原理进行了阐述.最后通过实验证明,此装置较为准确的测出了磁流变液的磁饱和强度.
现场即时检验在心血管疾病诊治应用中的过程控制

人类社会进入21世纪以来,随着基础医学和生命科学以及相关学科的突破和创新,医学检验技术呈现出三大发展趋势,即自动化、床边化和分子化.医学模式的转变使社会和患者对医疗服务的需求发生了新的变化,也对检验方法及检验的方式提出了新的要求.人们对疾病的认识已经由单纯治疗转向预防、保健、治疗和康复等多个角度,逐步减少了患者对医院的依赖,医疗活动也由医院扩大到了社区和家庭.
2004-2008年《中华显微外科杂志》载文、作者和基金资助论文统计分析

目的 了解<中华显微外科杂志>2004-2008年载文、作者和基金资助论文情况. 方法 利用维普(VIP)资讯系统(中文科技期刊数据库)采用文献计量法,分析<中华显微外科杂志>2004-2008年的载文量、作者合作度、合作率以及地域分布、基金支持等指标和内容. 结果 5年共检出1089篇文献,作者5746人次,合作度为5.28,合著率为96.14%.作者分布在全国32个省、自治区和直辖市,高等医药院校作者最多,占作者总数的48.48%.5年<中华显微外科杂志>共发表各类基金资助论文183篇. 结论 <中华显微外科杂志>已载有具有普遍的指导意义、影响深远的学术性文献,且著者整体学术水平高,在我国显微外科研究领域具有较大的影响,是外科学的重要期刊和核心期刊.
角膜溃疡板层清创术治疗中浅层真菌性角膜炎的显微手术技巧

目的 探讨角膜溃疡板层清创术在真菌性角膜炎治疗中的应用和显微技巧. 方法 对经药物无效的中浅层真菌性角膜炎38例(38眼)予以角膜溃疡板层清创术,观察术后视力、上皮修复时间、治愈时间等眼部转归情况,以及有无两次手术及复发等情况. 结果 随访13～22个月,术后视力较术前有提高(x~2=34.370,P<0.01),角膜上皮平均修复时间为(3.9±1.8)d,患眼平均治愈时间为(6.6±4.1)d.另有7眼(18.4%)再次手术,其中1眼行二次板层清创术,6眼行LKP术,并在随访期内未再复发. 结论 板层清创术是治疗中浅层真菌性角膜炎的一种经济有效的术式,一次性治愈率高,显微手术技巧易于掌握,适合推广.
克罗恩病合并Castleman病

患者男,50岁.因间断腹痛半年于2002年7月入院.入院前半年,无诱因出现腹痛,右侧明显,偶有脓血便、黑便,就诊于外院,胃镜示慢性胃炎,钡灌肠未见明显异常,予抑酸等治疗,效果差.
烧伤患者家属康复知识调查分析与健康教育对策

烧伤患者生理、心理上承受着巨大痛苦,治疗后期的康复护理是一个长期过程,家属在其中发挥着重要作用.有针对性地对患者家属进行健康教育,使之积极参与到整个康复护理过程中,可减轻患者心理负担,改善其身体功能和情绪,提高生活质量.为此笔者进行了如下调查,以期为烧伤患者的康复研究提供参考.
严重烧伤患者早期行连续性肾替代治疗效果观察

1 资料与方法1.1 临床资料选取2006年2月-2008年2月山西省烧伤救治中心收治的严重烧伤患者40例,按随机数字表法分成:(1)连续性肾替代治疗(CRRT)组,男15例、女5例,年龄18～56岁[(34±16)岁];烧伤总面积48%～99%[(70±21)%],其中Ⅲ度27%～93%[(73±24)%]TBSA.
细针滑膜活检术的临床应用

滑膜是类风湿关节炎(rheumatoid arthritis,RA)和其他许多关节病的主要靶组织,获取滑膜可进行关节病的病因、发病机制、诊断、预后及疗效的研究.近年,重复滑膜活检在生物制剂靶向治疗中的研究备受人们关注人们关注[1-3] .
First principles calculation of stable structure and adhesive strength of plated Ni/Fe(100) or Cu/Fe(100) interfaces

A study the with first principles calculation of the interfaces of the Ni layer or Cu layer on the Fe(100) surface formed with metal plating was performed. Ni or Cu atoms were shown to adopt the corresponding position to the bcc structure of the Fe(100) substrate. Other calculations showed that the interfaces of Ni (5 atomic layers)/Fe(100) (5 layers) or Cu (5 atomic layers)/Fe(100) (5 layers) had square lattices. The orientation relationship of Ni/Fe(100) interface corresponds to fcc-Ni(100)//bcc-Fe(100), Ni[011]//Fe[010], and Similar results were obtained for Cu/Fe(100) interfaces. This structure was supported by TEM analysis of plated Ni layer on Fe(100) surfaces. The adhesion strength of the Ni/Fe(100) interface evaluated by first principles calculation was higher than that of the Cu/Fe(100) interface. The experimental results of Hull cell iron plated with Ni or Cu supported the results of the calculation. These results indicate that the first principles calculation, which deals with the ideal interface at the atomic scale, has the potential to evaluate the adhesion strength of metallic material interfaces.
Mechanical properties and corrosion resistance of low rigidity quaternary titanium alloy for biomedical applications

Electrochemical corrosion of Ti-35Nb-5Ta-7Zr alloy fabricated by arc melting and heat treatment process was studied in 0.9% NaCl at (37±1) ℃. Phase and microstructure of the fabricated alloy were investigated using X-ray diffractometer and scanning electron microscope. Mechanical properties such as yield strength and elastic modulus of the alloy were determined by tensile test. Potentiodynamic polarization technique and impedance spectroscopy were employed to study the corrosion behavior. The results of the study were compared with those obtained for Ti-6Al-4V commercial alloy. The result of the study supports feasibility of Ti-35Nb-5Ta-7Zr alloy for implant applications.
神经妥乐平治疗椎管内麻醉后外周神经损伤的临床观察

临床椎管内麻醉时,在穿刺或置管过程中一些患者会有触电样感觉的主诉,大部分患者术后并无后遗症状发生,部分患者在术后的数天甚至数月时间内还会出现单侧肢体的感觉和运动障碍,暨椎管内麻醉后外周神经损伤.我院采用神经妥乐平(Neurotropin)治疗椎管内麻醉后外周神经损伤,取得较好效果,现报告如下:
胸段脊神经背根节射频热凝的CT定位引导穿刺技术

脊神经背根节(DRG)射频热凝可用于治疗多种顽同性根性神经痛的治疗[1],但对DRG的穿刺操作一直沿用Nash在1986年介绍的C臂X线荧屏透视下进行[2].
转基因家蚕丝腺组织和转化家蚕培养细胞表达hIGF-Ⅰ

为实现在家蚕培养细胞和家蚕丝腺组织中表达人胰岛素样生长因子(hIGF-Ⅰ)基因,以家蚕丝胶基因启动子(Pser-1)驱动hIGF-Ⅰ,基因,构建了带有家蚕杆状病毒ie-1启动子(PPie-1)控制的neo基因表达盒的转基因载体pigA3GFP-hIGF-ie-neo.在可表达转座酶的辅助质粒存在下,分别转染BmN培养细胞,以700-800μg/mL的G418筛选,获得了稳定转化细胞系.Western blotting分析可检测到hIGF-Ⅰ的特异性条带,ELISA检测结果显示,hIGF-Ⅰ在5×10~5个细胞中的表达水平约7800 pg.通过反向PCR分析表明,在转化细胞中外源DNA可通过随机整合或按照piggyBac特定的靶位点序列TTAA插入细胞基因组.转基因载体pigA3GFP-hIGF-ie-neo通过精子介导法导入蚕卵,利用neo,gfp基因的双重筛选,经过PCR和点杂交鉴定,获得了2头转基因家蚕.ELISA检测结果显示,在G1代hIGF-Ⅰ在每克中部丝腺组织中的表达水平为2440 pg左右.
A new compound from the fruit of Amorpha fruticosa and activity against acetaminophen-induced hepatotoxicity

A new isoflavone was obstained from the medicinal herb Amorphafruticosa. It was elucidated asbenzopyran-12-one, 1,4,10,11-tetrahydro-6'-[8'-(hydroxymethyl)ethenyl]-2,3-dimethoxy-8'-O-β-D-glucopyranosyl-O-α-D-arabinoside by spectroscopic methods including UV, IR, 1D NMR and 2D NMR techniques. And the activity against acetaminophen-induced hepatotoxicity of this compound was also studied, and found this compound can protect liver obviously from hepatotoxicity induced by acetaminophen (AAP).
Model and algorithm of flow interception problem with multi-type of flows

To study simultaneous location of different kinds of facilities,a new model of flow interception problem with multi-type of flows is proposed,with the consideration of multi-purpose flows and the influence of facilities on each other.To be more practical,the objective is to maximize the benefits from flow-by customers instead of maximizing flows in the past.Since this problem is NP-hard and there is no optimal solution for large network,greedy and improved greedy heuristic algorithms are proposed.A computational example is presented to show that the optimal location decisions are proved to be strongly dependent on the influence coefficients and average profits by one customer and different types of facilities are almost co-located.Finally the results of sensitivity analysis are reported.
Simutaneous radar imaging and velocity measuring with step frequency waveforms

The principle and method of both radar target imaging and velocity measurement simultaneously based on step frequency waveforms is presented.Velocity compensation is necessary in order to obtain the good High resolution range profile since this waveform is greatly sensitive to the Doppler shift.The velocity measurement performance of the four styles is analyzed with two pulse trains consisted of positive and negative step frequency waveforms.The velocity of targets can be estimated first coarsely by using the pulse trains with positive-positive step frequency combination,and then fine by positive-negative combination.Simulation results indicate that the method can accomplish the accurate estimation of the velocity with efficient computation and good anti-noise performance and obtain the good HRRP simultaneously.
Analysis and improvement of missile three-loop autopilots

The non-minimum phase feature of tail-controlled missile airframes is analyzed.Three selection strategies for desired performance indexes are presented.An acceleration autopilot design methodology based on output feedback and optimization is proposed.Performance and robustness comparisons between the two-loop and classical three-loop topologies are made.Attempts to improve the classical three-loop topology are discussed.Despite the same open-loop structure,the classical three-loop autopilot shows distinct characteristics from a two-loop autopilot with PI compensator.Both the two-loop and three-loop topologies can stabilize a static unstable missile.However,the finite actuator resource is the crucial factor dominating autopilot function.
Capacity analysis of high-rank line-of-sight MIMO channels

Matrix perturbation theory is utilized to investigate high-rank line of sight multiple input multiple output channels in a microwave relay system.The upper and lower bounds of channel capacity are derived based on space time block codes technique and singular values decomposition.A useful constraint for designing LOS MIMO channels is developed by the use of the condition number of the MIMO channel matrix.The theoretical analysis of channel capacity is confirmed by the simulation.The results show that the proposed method is able to give a physical explanation of the high-rank LOS MIMO channel matrix characteristics.
逆行胰胆管造影对胰腺分裂症的诊断价值

胰腺分裂症是一种胰腺在发育过程中主、副胰管未融合或融合不全的少见先天性疾病.其特征为背侧或腹侧胰管彼次分隔或由纤细的次级分支沟通,全部或大部分胰液经十二指肠副乳头排泄,常因胰液引流小畅出现复发性胰腺炎症状,临床上极易误诊~([1-4]).
Adalimumab in ulcerative colitis: Two cases of mucosal healing and clinical response at two years

Infliximab (IFX) is currently the only biologic therapy used in the treatment of moderate-to-severe ulcerative colitis (UC). In the years to come, more biologic therapies will have a role in the management of moderate-to-severe UC. We report on two patients with steroid-dependent UC who, due to adverse reactions to IFX, have been under therapy with adalimumab for two years. Both patients received concomitant immunosuppressive treatment. Long term clinical remission and mucosal healing are described.