mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Development of An ICR Mouse Bioassay for Toxicity Evaluation in Neurotoxic Poisoning Toxins-Contaminated Shellfish

Objective To develop an ICR (female) mouse bioassay (MBA) for toxicity confirmation and evaluation of neurotoxins (brevetoxins)-contaminated shellfish. Methods Brevetoxins (BTX-B) as a causative agent of neurotoxic shellfish poisoning (NSP) under different shellfish matrices were intraperitoneally injected at different doses into mice to study their toxic effects and to differentiate the range of lethal and sublethal dosages. Their sensitivity and specificity were analyzed with 2 competitive ELISA kits for quantitative determination of standard BTX-B and dihydroBTX-B under different shellfish matrix-diluent combinations. Detection rates of MBA and two antibody-based assays for BTX-B from field NSP-positive shellfish samples were compared. Results BTX-B could be detected in shellfish tissues at concentration of 50-400 μg/100 g under shellfish matrix-Tween-saline media, which were appropriate to identify toxic shellfish at or above the regulatory limit (80 μg/100 g shellfish tissues). The LD _(50) identified was 455 g/kg for BTX-B under general shellfish matrices (excluding oyster matrices) dissolved in Tween-saline. The presence of shellfish matrices, of oyster matrices in particular, retarded the occurrence of death and toxicity presentation in mice. Two antibody-based assays, even in the presence of different shellfish matrix-diluent combinations, showed acceptable results in quantifying BTX-B and dihydroBTX-B well below the regulatory limit. Conclusion The two ELISA analyses agree favorably (correlation coefficient, r 0.96; Student’s t-tests, P>0.05) with the developed bioassay.
The Weather Temperature and Air Pollution Interaction and Its Effect on Hospital Admissions due to Respiratory System Diseases in Western China

Air pollution has ever become a global major public health problem.Previous studies showed that air pollution is associated with excessive mortality and morbidity of respiratory disease.The extreme weather temperature can impact human health and the thermal stresses can lead not only to direct deaths and illnesses,but also to aggravation of respiratory disease.Though the independentimpacts of extreme weather temperature and air pollution on human health have been widely explored, the interactive effect of weather temperature and air pollution on human health has been scarcely reported in the recent years. In China,the largest developing country in the world,although the interactive effect of weather temperature and air pollution on daily mortality has been examined in several economically developed large cities, such as Tianjin, Shanghai, and Wuhan, no data available from within the country so far on the association between exposure to air pollution and increased hospital admissions.
等离子体浸没式氧离子注入技术修饰ITO表面的研究

有机电致发光器件(OLED)具有自发光、低功耗、响应快、亮度高、可视角度大等特点,是下一代理想的显示技术及面光源.当前OLED广泛采用氧化铟锡(ITO)透明阳极兼出光窗口,然而,ITO表面功函数与器件内层有机材料最高电子占有轨道(HOMO)之间的势垒较高,器件工作电压高,导致能效偏低以及稳定性差等问题.射频等离子体处理ITO可获得一定幅度功函数提高(约0.4eV),但仍未达到与有机材料最高电子占有轨道匹配程度,而且,处理效果时效性很短,只有数小时.而采用等离子体浸没式氧离子注入(PIII)技术修饰ITO表面,可精确控制氧离子注入剂量及深度,改变ITO表层氧、铟、锡3种元素原子比例.在不改变ITO薄膜主体透明性及导电性的基础上,表面功函数提高幅度达0.8eV,与主要的OLED空穴输运有机材料的HOMO能级匹配,并且,处理效果经过50h后未见明显衰退迹象.
基于分数阶微积分的电感电流断续模式下Boost变换器的建模与分析

基于实际电容和实际电感在本质上是分数阶的事实,采用分数阶微积分理论建立电感电流断续模式下Boost变换器的分数阶数学模型.依据状态平均建模方法,建立电感电流断续模式下Boost变换器的分数阶状态平均模型,并进行理论分析.然后,比较电感电流断续模式下Boost变换器的分数阶模型与整数阶模型的区别.最后,基于分数阶微积分的改进Oustaloup滤波器算法,建立电感电流断续模式下Boost变换器分数阶模型的Matlab/Simulink仿真模型,并进行数值仿真分析以验证分数阶建模与理论分析的正确性.
基于广域瞬时量测信息的复杂受端电网动态频率量化评估与预警方法研究

在深入研究电力系统动态频率响应过程的基础上,提出了一种基于广域瞬时量测信息的复杂受端电网动态频率量化评估与安全预警方法.基于电力系统简化频率响应模型(SFR)的基本特征,定义了一种仅依赖于扰动初始时刻量测信息的量化评估指标,该指标物理意义清晰,指标数值能够客观的反映系统动态频率的安全状态.本文提出的量化评估指标具有单调性和平滑性较好,计算简单且易于实现等优点.多机系统算例仿真计算与分析结果论证了指标的可行性和有效性.
Differentially-expressed opsin genes identified in Sinocyclocheilus cavefish endemic to China

Eye degeneration is a common troglomorphic character of cave-dwelling organisms.Comparing the morphology and molecular biology of cave species and their close surface relatives is a powerful tool for studying regressive eye evolution and other adaptive phenotypes.We compared two co-occurring and closely-related species of the fish genus Sinocyclocheilus,which is endemic to China and includes both surface- and cave-dwelling species.Sinocyclocheilus tileihornes,a cave species,had smaller eyes than Sinocyclocheilus angustiporus,a surface species.Histological and immunohistochemical analyses revealed that the cavefish had shorter cones and more disorderly rods than did the surface-dwelling species.Using quantitative PCR and in situ hybridization,we found that rhodopsin and a long-wavelength sensitive opsin had significantly lower expression levels in the cavefish.Furthermore,one of two short-wavelength-sensitive opsins was expressed at significantly higher levels in the cavefish.Changes in the expression of opsin genes may have played a role in the degeneration of cavefish eyes.
高压氧联合间歇导尿治疗脊髓损伤致神经源性膀胱功能障碍的疗效分析

脊髓损伤(spinal cord injury,SCI)不仅损害患者的躯体感觉和运动功能,而且可以引起排泄功能障碍。SCI稳定后,1/3以上的患者认为排尿和排便功能障碍对生存质量的影响最大。国内外研究显示,反复泌尿系感染、结石、肾积水及肾功能衰竭是患者晚期死亡的首位原因;患者多数为健康的青壮年。目前,SCI后神经源性膀胱功能障碍(neurogenic bladder,NB)一直是未能很好解决的临床难题,笔者采用高压氧(hyperbaric oxygen,HBO)联合间歇导尿(intermittent catheterization,IC)治疗SCI致NB的患者,使其在相对短的时间内重建膀胱功能,达到自控排尿,这对提高患者的生存质量,降低并发症和死亡率,有着重要的临床意义。
Plasma-Chemical Synthesis of Oxide Powders Using Transformer-Coupled Discharge

An experimental investigation of transformer-coupled discharge in an Ar-O_2mixture with the addition of SiCl_4, TiCl_4and ZrCl_4has been carried out under the atmospheric pressure of plasma-forming gases. Discharge power and discharge heat losses have been determined, and the dispersion and phase composition of reaction products (oxide powders) has been analyzed with SEM and X-ray difiraction analysis. Investigations reveal the formation of ultraflne oxide powders in the case of vaporized chloride (SiCl_4and TiCl_4) injecting into the transformer coupled discharge. In the case offlne powder (ZrCl_4) injection, full oxidation was not observed and reaction products consisted of a mixture of ZrO_2and ZrOCl_2. A conclusion has been made regarding the perspectives of using transformer-coupled discharge to produce ultraflne oxide powders.
Effect of Low-Pressure Nitrogen DC Plasma Treatment on the Surface Properties of Biaxially Oriented Polypropylene, Poly (Methyl Methacrylate) and Polyvinyl Chloride Films

In this study, commercial biaxially oriented polypropylene (BOPP), polyvinyl chloride (PVC) and poly (methyl methacrylate) (PMMA) films were treated with nitrogen plasma over different exposure times in a Pyrex tube surrounded by a DC variable magnetic field. The chemical changes that appeared on the surface of the samples were investigated using Fourier transform infrared (FT-IR) spectroscopy and attenuated total reflectance Fourier transform infrared (ATR- FTIR) spectroscopy after treatment for 2 min, 4 min and 6 min in a nitrogen plasma chamber. Effects of the plasma treatment on the surface topographies and contact angles of the untreated and plasma treated films were also analyzed by atomic force microscopy (AFM) and a contact angle measuring system. The results show that the plasma treated films become more hydrophilic with an enhanced wettability due to the formation of some new polar groups on the surface of the treated films. Moreover, at higher exposure times, the total surface energy in all treated films increased while a reduction in contact angle occurred. The behavior of surface roughness in each sample was completely different at higher exposure times.
粮库谷堆中干尸形成1例

尸体处在干热或通风条件良好的环境中,水分迅速蒸发而不发生腐败,以干枯状态保存下来,称为干尸或称木乃伊。未经人工处理形成的自然干尸多是在特别干燥或没有空气的地方,由于细菌微生物难以生存,最终导致尸体迅速脱水而形成。
法医病理学教学切片的质量控制与评价

法医病理学是一门实践性很强的形态学科,在法医病理学工作中,组织病理学诊断,对确定死因有着重要意义。阅读组织切片是法医病理实验教学的重要内容,而组织切片质量的优劣直接影响到病理诊断的准确性,从而影响到法医病理学实验课的效果。随着法医学教育的发展和在校学生人数的增长,原有教学切片数量、种类和质量已不能满足教学需要。为此笔者采用标准程序和质量控制方法制作高质量教学组织切片,效果较好,可供同行借鉴。
美洲鲥与孟加拉鲥肌肉营养成分比较

美洲鲥(Alosasapidissima)、孟加拉鲥(Tenualosailisha)分别属鲱形总目(Clupeo-morpha)、鲱形目(Clupeiformes)、鲱科(Clupei-dae)的西鲱属(Alosa)和鲥属(Tenualosa)。美洲鲥分布于北美洲东西沿岸的河流和海洋中,孟加拉鲥分布在波斯湾之孟加拉的北孟加拉洋,包括孟加拉东海岸和西海岸,是每年春夏之交准时溯河产卵繁殖的洄游性鱼类。美洲鲥、孟加拉鲥与濒临灭绝的中国鲥(Tenualosareevesii)在形态上相似,口感、味道上也非常接近~([1-2]),但在1998年,中国鲥就录入了中国濒危物种红皮书,近十几年鲜有捕捞到中国鲥的报道。本世纪初,我国从美国引进美洲鲥受精卵,进行孵化培育和人工驯养。目前,美洲鲥已成为潜在的养殖品种~([4])。我国近年也在尝试从缅甸等东南亚国家引进孟加拉鲥苗种进行人工驯养,尚未成功,但每年进口大量冰鲜孟加拉鲥以满足国内市场需求。为此,本研究对美洲鲥和孟加拉鲥的肌肉营养成分进行比较,旨在全面了解美洲鲥的特征,为人工养殖美洲鲥提供理论支持。
胆碱

胆碱(choline)是磷脂酰胆碱(phosphatidylcholine,PC)和神经鞘磷脂的关键组成成分,作为机体可变的甲基(或一碳单位)的来源参与甲基供体的合成与代谢。此外,胆碱还是神经递质乙酰胆碱的前体。1998年,胆碱首次被美国食物与营养委员会(FoodandNutritionBoard,FNB)列入人类必需营养素而修订了其推荐量。由于人体可以利用PC碱和神经鞘磷脂合成内源性胆碱,因此胆碱缺乏病很罕见。
Correlations between papillary thyroid cancer and peripheral blood levels of matrix metalloproteinase-2, matrix metalloproteinase-9, tissue inhibitor of metalloproteinase-1, and tissue inhibitor of metalloproteinase-2

Background The relationship between the presence of metalloproteinases and thyroid cancer remains unknown, and many controversies still exist in this field. The objective of this study was to investigate the correlations between papillary thyroid cancer and peripheral blood levels of matrix metalloproteinase-2, matrix metalloproteinase-9, tissue inhibitor of metalloproteinase-1, and tissue inhibitor of metalloproteinase-2. Methods The correlations were studied by detecting the levels of matrix metalloproteinase-2, matrix metalloproteinase-9, tissue inhibitor of metalloproteinase-1, and tissue inhibitor of metalloproteinase-2 by enzyme-linked immunosorbant assay and reverse-transcription polymerase chain reaction in the peripheral blood of 30 patients with papillary thyroid carcinoma, 27 patients with benign thyroid disease, and 25 healthy volunteers. Results The levels of matrix metalloproteinase-2, matrix metalloproteinase-9, tissue inhibitor of metalloproteinase-1, and tissue inhibitor of metalloproteinase-2 in the peripheral blood of patients with papillary thyroid carcinoma were significantly higher than those in the peripheral blood of patients with benign thyroid disease and healthy volunteers (P <0.05). However, there were no significant differences between patients with benign thyroid disease and healthy volunteers (P >0.05). The accuracy of detection by both enzyme-linked immunosorbant assay and reverse-transcription polymerase chain reaction in the papillary thyroid cancer group was 83.33%. Conclusions The levels of matrix metalloproteinase-2, matrix metalloproteinase-9, tissue inhibitor of metalloproteinase-1, and tissue inhibitor of metalloproteinase-2 in the peripheral blood are helpful in identifying thyroid carcinoma and aid in preoperative assessment.
Observations of the Karimata Strait througflow from December 2007 to November 2008

In order to quantitatively estimate the volume and property transports between the South China Sea and Indonesian Seas via the Karimata Strait, two trawl-resistant bottom mounts, with ADCPs embedded, were deployed in the strait to measure the velocity profile as part of the South China Sea-Indonesian Seas transport/exchange (SITE) program. A pair of surface and bottom acoustic modems was employed to transfer the measured velocity without recovering the mooring. The advantage and problems of the instruments in this field work are reported and discussed. The field observations confirm the existence of the South China Sea branch of Indonesian throughflow via the Karimata Strait with a stronger southward flow in boreal winter and weaker southward bottomflow in boreal summer, beneath the upper layer northward (reversal) flow. The estimate of the averaged volume, heat and freshwater transports from December 2007 to March 2008 (winter) is (–2.7±1.1)×10~6 m~3/s, (–0.30±0.11) PW, (–0.18±0.07)×10~6 m~3/s and fromMay to September 2008 (summer) is (1.2±0.6)×10~6 m~3/s, (0.14±0.03) PW, (0.12±0.04)×10~6 m~3/s and for the entire record from December 2007 to October 2008 is (–0.5±1.9)×10~6 m~3/s, (–0.05±0.22) PW, (–0.01±0.15)×10~6 m~3/s (negative/positive represents southward/northward transport), respectively. The existence of southward bottom flow in boreal summer implies that the downward sea surface slope fromnorth to south as found by Fang et al. (2010) for winter is a year-round phenomenon.
泥质烃源岩中<2μm黏粒级组分的有机质与比表面关系

选取东营凹陷13块烃源岩岩芯,提取<2μm黏粒级组分,对氯仿抽提前后样品分别进行热解分析和N_2吸附法比表面积测试,探讨了黏粒级组分有机质与比表面积(S_(BET))的关系。结果显示:(1)黏粒级组分中不同赋存态有机质共存,不同演化阶段对生烃贡献有差异,并影响了黏粒级组分S_(BET)的测定;(2)黏粒级组分有机质与比表面积关系受多种因素影响,TOC含量与S_(BET)呈非线性负相关;(3)黏粒级组分的孔隙是可溶有机质的主要赋存空间,氯仿沥青"A"含量与S_(BET)呈负相关;(4)游离态烃类(S1)主要赋存空间为黏粒级组分的孔隙或表面,热解烃(S2)则以与黏土矿物相结合形式存在。泥质烃源岩<2μm黏粒级组分中不同赋存态有机质的研究及与比表面关系的探讨,对有机质生烃、烃类聚集和运移研究都有重要意义。
印度洋偶极子对北印度洋热带气旋活动的影响研究

利用JTWC提供的1981~2010年北印度洋热带气旋路径资料,NECP提供的风场、OLR场等资料,以及NOAA提供的SST资料,使用统计诊断方法研究了北印度洋热带气旋活动时空分布特征及其与印度洋海温的关系。结果表明:北印度洋热带气旋活动频次EOF1占总方差贡献的比例为16%,反映了北印度洋整个海盆尺度热带气旋活动频次变化基本一致的分布形态,但是其空间分布具有不均匀性,表现为以孟加拉湾热带气旋偏西路径变化为主的特征;小波分析表明EOF1模态有显著的准5年变化周期。印度洋偶极子对北印度洋热带气旋活动年际变化影响显著,其影响机制概念模型为:印度洋偶极子处于正(负)位相模态时,印度洋海温异常呈显著的西暖东冷(西冷东暖)型分布,造成北印度洋上空对流减弱(加强)、低层有反气旋(气旋)式环流异常,不利(有利)于热带气旋在北印度洋生成,北印度洋热带气旋活动频次偏少(多);且可造成孟加拉湾上空西风引导气流加强(减弱),进一步使得出现在孟加拉湾90°E以西的偏西路径热带气旋偏少(多)。
中国东华北部分地区玉米主推品种高产氮高效潜力分析

选育高产与养分高效的粮食品种(高产高效品种)是解决中国粮食安全和资源、环境问题的重要途径之一,但是利用氮高效品种实现玉米节氮增产的潜力并不清楚.本研究对中国东华北主栽玉米品种在8个环境下进行了产量及氮效率评价,以期为玉米高产氮高效育种提供依据.结果表明,在适宜的低氮胁迫下(减产幅度为25%~60%),玉米产量的基因型×氮互作效应显著,能够筛选到不同类型的氮效率品种.目前东华北玉米主推品种中,在高产栽培条件下,高产氮高效品种(包括双高效型和高氮高效型两种类型)的增产幅度为8%~10%,节氮潜力达到16%~21%.在低氮胁迫下,耐低氮品种具有增产12%的潜力.选育高产氮高效玉米品种是实现增产节氮的可行途径。
线粒体全基因组测序探寻高原环境对Artemia tibetiana和A.urmiana卤虫种线粒体基因的影响

卤虫(Artemia)属甲壳纲无背甲目,生活于高盐环境中,低海拔和高海拔地区均有分布,在适应不同环境需求的过程中形成了遗传的多样性.为研究卤虫表型的可塑性,本研究对2个来自青藏高原的A.tibetiana和1个来自伊朗乌尔米耶湖的A.urmiana的线粒体进行了全基因组测序,将获得的3个序列信息与另一低海拔平原上的卤虫种A.franciscana进行比较分析.在线粒体蛋白编码基因的序列比对中发现:A.franciscana和A.tibetiana/A.urmiana组间atp8基因的Ka/Ks值最高,而A.tibetiana和A.urmiana组间,atp6基因的Ka/Ks值最高.鉴于A.tibetiana和A.urmiana遗传距离较近,但分别分布于高海拔和低海拔,环境差异显著,提示在高原环境适应过程中atp6基因可能受到强的选择压力.在D-loop区鉴别到2个延长终止相关的序列(ETASs)和3个保守序列块(CSBs),猜测D-loop或者呼吸链亚基的序列变化,可单独或共作用促进卤虫适应不同海拔环境。
四川盆地东部天然气中CO_2的成因和来源

四川盆地东部天然气中CO_2含量多数小于2%,但H_2S含量大于5%时CO_2含量普遍较高。川东地区天然气δ~(13)C_1值较高,与H_2S含量之间没有明显关系。油型气样品普遍发生了甲、乙烷碳同位素倒转,而煤成气样品则表现出正序特征。天然气中CO_2的δ~(13)C_1值大致可以分为较低(24‰~12‰)和较高(8‰~4‰)两类。这些天然气具有较低的R/Ra值和分布较广的CO_2/~3He比值,与幔源气体不同,CO_2均为典型壳源成因。高δ~(13)C_(CO_2)值的天然气均位于川东北地区,其中低(不)含H_2S气藏中的CO_2主要来自二叠纪岩浆活动和高热流作用下碳酸盐岩的热分解,而TSR反应程度较高的气藏中的CO_2则主要来自碳酸盐岩储层在酸性较强的地层水中发生的去白云岩化作用,TSR成因的CO_2基本进入到次生方解石中。川东的中、南部地区天然气则具有低的δ~(13)C_(CO_2)值,该区受峨眉山地幔柱活动影响较小,天然气中的CO_2均为有机成因,其中卧龙河气田天然气尽管经历了TSR作用,但反应程度相对较低,地层水酸性较弱,储层尚未发生去白云岩化,CO_2仍以TSR成因的为主,具有较低的δ~(13)C值。
亚洲季风区深对流系统的区域分布和日变化特征

利用TRMM卫星12年的观测资料,分析了亚洲季风区20dBZ回波顶高大于14km的深对流系统的分布特征,结合NCEP再分析资料对深对流系统的空间分布特征成因进行了探讨,并对不同地形条件下的深对流系统进行了对比研究。结果表明,深对流系统主要发生在陆地上,夏季风爆发前,深对流系统主要分布在20°N以南;季风爆发后,深对流系统的分布向中纬度地区发展并以青藏高原南麓地区最活跃。青藏高原上的深对流系统的发生频数较中国中东部高,但水平尺度小,对流强度较弱,而中国中东部地区的深对流系统虽然发生频数较低但对流强,且闪电频数大。洋面上的深对流系统表现为最小红外亮温小(对应云顶高),40dBZ回波最大面积比陆地上大但出现高度较低,闪电频数少。陆地上的深对流系统主要集中发生在午后至午夜,青藏高原上的深对流更加集中的发生在午后至傍晚,海洋上发生在凌晨至日出前的深对流系统较其他时段多,但日变化幅度不大,热带海洋性大陆深对流的日变化与大陆上类似。
Efficacy of suspended moxibustion in stroke rats is associated with a change in tail temperature

Suspended moxibustion-produced heat can transfer from the acupoint to other sites of the body. The suspended moxibustion should be terminated when clinical propagated sensation disappears, because this implies that the quantity of moxibustion is sufficient. We wanted to investigate if this phenomenon also occurs in experimental animals. In the present study, a rat model of stroke was established and treated with suspended moxibustion at Dazhui (DU14) for 60 minutes. Results showed that the increase in tail temperature began at 15 minutes after suspended moxibustion and decreased gradually at 40 minutes. In addition, neurological function was significantly improved in stroke rats with tail temperature increase following suspended moxibustion, and this effect was associated with significantly reduced tumor necrosis factor α and interleukin 1β mRNA. However, there was no significant difference between 40- and 60-minute suspended moxibustion. The findings indicate that elevated tail temperature began to decrease at 40 minutes after suspended moxibustion, and further suspended moxibustion was not useful in the recovery of stroke rats.
肌萎缩侧索硬化患者血浆microRNA-1285表达的初步研究

肌萎缩侧索硬化(amyotrophic lateral sclerosis, ALS)是一种病因未明的选择性累及脊髓前角、脑干运动神经核以及大脑运动皮质的神经变性疾病。由于目前对于ALS的诊断缺乏“金标准”,且该病临床表现存在较大的异质性,临床上诊断有时较困难。
周斌从寒湿入络诊治慢性萎缩性胃炎思路

慢性萎缩性胃炎(CAG)作为慢性胃炎的一种类型,当胃黏膜固有腺体萎缩,尤其伴有不完全性结肠型肠化生和中、重度异型增生时,被视为胃癌的癌前病变。现代医学对CAG的治疗以对症处理、定期随访监测为主,对胃黏膜的萎缩、肠上皮化生及异型增生的逆转尚无特殊的应对措施。CAG属中医"胃痞"范畴。笔者导师周斌从事消化系统疾病临床工作20余年,积累了丰富的经验。现将其从寒湿入络诊治慢性萎缩性胃炎思路整理如下。
Independent component analysis to physical-layer network coding over wireless fading channels

A new combinational technology is proposed,which is feasible to apply physical-layer network coding(PNC) to wireless fading channels by employing the harmful interference strategically.The key step of PNC is that sources broadcast signals simultaneously without orthogonal scheduling.Naturally,the signals overlap in the free space at the receivers.Since the signals from different sources are mutual independent,rooted on this rational assumption,an enhanced joint diagonalization separation named altering row diagonalization(ARD) algorithm is exploited to separate these signals by maximizing the cost function measuring independence among them.This ARD PNC(APNC) methodology provides an innovative way to implement signal-level network coding at the presence of interference and without any priori information about channels in fading environments.In conclusions,the proposed APNC performs well with higher bandwidth utility and lower error rate.
胃溃疡并全身多发非特异性淋巴结炎PET/CT假阳性显像1例

不同组织类型的胃癌对~(18) F-FDG代谢摄取程度不同,小肠型、低分化和黏液成分较少的肿瘤SUV_(max)明显高于非肠型、分化好和黏液成分较多的肿瘤;腺癌中黏液腺癌和印戒细胞癌呈低代谢。假阳性可见于生理性摄取、炎症或溃疡。胃内出现明显局灶性或节段性摄取往往见于炎症或溃疡,与胃壁肿瘤性摄取不易鉴别,特别是如本例延迟显像SUV_(max)升高时。非特异性淋巴结炎的淋巴结肿大较局限,受累淋巴结数量少,体积较小,无粘连及成块,无肺门或纵隔淋巴结肿大;而大多数胃癌淋巴结直径<10mm。本例胃溃疡与全身多发非特异性淋巴结炎同时存在,导致~(18) F-FDG PET/CT诊断倾向于胃癌。非特异性淋巴结炎、肉芽肿性淋巴结炎、组织细胞坏死性淋巴结炎、结核性淋巴结炎、猫抓病均可出现假阳性,易误诊为肿瘤性病变,应结合临床及其他影像学检查进行综合分析。
海河流域典型城市水环境整治的关键技术集成与示范应用

针对海河流域许多城市面临的"水资源量少、水体污染重、水生态平衡破坏、缺乏技术支撑"等共性水环境问题,选择处于海河流域下游、水资源极度匮乏、境内水环境问题突出、境外来水污染严重的天津滨海新区及其上游地带的天津中心城区、北京主城区和廊坊中心城区,开展了海河流域城市水污染控制与资源化利用的关键技术研究和工程示范应用,初步形成了包含工业节水控源减排、污水处理厂升级改造、污水再生利用与雨水利用、城市景观水体功能恢复、滨海盐碱湿地保护与修复、小城镇水污染控制等方面关键技术的技术集成体系与工程技术方案,为海河流域典型城市有效消减水污染负荷、改善城市水体水质和保障水环境安全提供了技术支撑。
洗洁精对小麦种子萌发生长及部分生化遗传指标的影响

目的探讨洗洁精对小麦种子萌发和幼苗生长的影响及生化和遗传机制。方法将不同浓度(10、13、16和25 mg/ml)的洗洁精分别处理要萌发的小麦种子,以自来水处理的种子作为对照组,每个处理重复4次,共做3次重复实验。4 d后统计发芽率,7 d时测量芽长、根长和须根数。测量根中过氧化物酶(POD)和叶片中还原糖的含量。将长出的幼根用上述各浓度的洗洁精浸润24 h后,按常规制片法,计算有丝分裂指数,观察染色质形态。结果随着洗洁精浓度的增加,小麦种子的发芽率、根长、芽长和须根数明显的降低,与对照相比,差异均有统计学意义(P<0.01)。随着洗洁精浓度的增加,根中的POD活性呈现出逐渐增加的趋势,小麦叶片中葡萄糖含量逐渐减低,有丝分裂指数显著降低,对染色质造成的伤害逐渐增加。结论洗洁精对小麦种子的萌发和幼苗生长存在抑制效应,造成小麦生化改变和遗传损伤,其毒性程度存在剂量效应。
特殊形式穿支皮瓣的临床应用教程

穿支皮瓣被誉为“皮瓣外科微创化”的标志,代表了皮瓣外科的最新发展。血流桥接穿支皮瓣、显微削薄穿支皮瓣、联体穿支皮瓣、分叶穿支皮瓣、嵌合穿支皮瓣是穿支皮瓣的特殊形式,是穿支皮瓣的衍生和发展。特殊形式穿支皮瓣的衍生和发展,丰富了穿支皮瓣的内涵,扩大了穿支皮瓣的适应证。为促进特殊形式穿支皮瓣在我国的推广与发展,有必要提出特殊形式穿支皮瓣的临床应用原则。
游离足底内侧动脉化静脉皮瓣修复指端缺损

目的探讨游离足底内侧动脉化静脉皮瓣修复指端缺损的手术方法和临床效果。方法2010年9月至2011年6月,对11例13指指端缺损行游离足底内侧动脉化静脉皮瓣修复。11例13指指端缺损创面均有末节指骨外露,缺损范围1.2 cm × 1.5 cm~2.0 cm × 3.0 cm。术中切取大小为1. 5 cm × 1.8 cm~2.5 cm × 3.5 cm足底内侧静脉皮瓣修复缺损。供区全部采用全厚皮片植皮。结果术后13例皮瓣全部成活,创面I期愈合。供区切口I期愈合,植皮全部成活。10例11指术后获随访,术后随访6~12个月,伤指的指端外形满意,指腹饱满而不臃肿,色泽、质地与周围正常皮肤相似,两点辨别觉为7~10 mm。 结论游离足底动脉化内侧静脉皮瓣修复指端缺损,术后效果好,供区损伤小,是修复手指指端缺损的一种较理想方法。
神经内镜辅助锁孔人路微血管减压术治疗面肌痉挛34例分析

目的针对原发性面肌痉挛的发病原因,结合神经内镜技术及锁孔技术探讨神经内镜辅助锁孔人路下微血管减压术在原发性面肌痉挛治疗中的疗效。方法对自2008年6月至2010年6月间收治并经神经内镜辅助锁孔人路微血管减压术治疗的34例原发性面肌痉挛患者的临床资料、影像学资料及手术资料进行总结分析。结果总计39条责任血管中,动脉接触25条,动脉压迫6条,静脉接触与压迫8条。2条责任血管者9例(26.5%),小脑前下动脉压迫16例,小脑后下动脉压迫10例,椎动脉压迫3例,基底动脉压迫2例,静脉压迫者8例。32例患者随访2年,2例失访,术后20例(58.8%)抽搐症状立即消失,术后1个月内抽搐逐渐停止者10例(29.4%),1例术后1年左右抽搐才逐渐停止(2.9%),1例患者随访2年仍有间断抽搐发作需继续服用药物,1例有轻度同侧听力下降,其他患者症状均有效控制,无复发。结论神经内镜辅助锁孔入路微血管减压术是治疗面肌痉挛非常有效的方法,术中应用微创的理念结合神经内镜的优势仔细辨别相关的责任血管,对面神经根部和远端进行全程探查和有效减压,是直接影响术后临床效果的关键。
寄养骨与寄养指同时回植修复拇指V度缺损

目的探讨利用皮下寄存的游离掌(指)骨与异位寄养的拇指同时回植到手部修复拇指V度缺损的可行性。方法自2005年2月至2011年2月,将7例拇指V度缺损的患者利用皮下寄存的游离掌(指)骨移回手部重建第一掌骨,同时将异位寄养在足部、腕部的手指移回手部修复拇指缺损,寄养指的掌(指)骨断端与移回手部的游离掌(指)骨远端以克氏针交叉固定,同期修复指神经和屈、伸指肌腱,再造拇指的供血动脉为桡动脉,回流静脉为手部的浅静脉。结果7例再造拇指均成活,再造拇指外观饱满,色泽正常,外形接近正常拇指,两点辨别觉7~10 mm,4例于6个月时行拇对掌功能重建手术,3例因肌腱粘连于8个月时行肌腱松解手术,经1~7年随访,再造拇指对指及对掌功能满意。结论利用皮下寄存的游离掌指骨与异位寄养指同时回植修复拇指V度缺损,可收到良好的手术效果。
中国特殊形式支皮瓣的名词术语与定义专家共识

穿支皮瓣是近年来皮瓣外科领域的研究热点,因其改善了皮瓣受区的外形和功能、最大程度减少了皮瓣供区外观和功能的损害,目前已被广泛应用于乳房重建及头、颈、躯干与四肢创面的修复。随着临床应用的推广与深入研究,发现经典的穿支皮瓣仍然存在一定的局限性。近年来在秉承穿支皮瓣核心理念的基础上,穿支皮瓣术式得到了不断发展,如为了不牺牲受区主干血管衍生了血流桥接穿支皮瓣,为了避免皮瓣臃肿衍生了显微削薄穿支皮瓣,为了修复超长创面衍生了联体穿支皮瓣,为了吻合一组血管同时修复多个创面衍生了分叶穿支皮瓣,为了使合并深部骨骼或肌肉组织缺损的创面得到立体美学修复衍生了嵌合穿支皮瓣等等。这些特殊形式穿支皮瓣的衍生和发展,丰富了穿支皮瓣的内涵,扩大了穿支皮瓣的适应证。为促进穿支皮瓣在我国的普及和发展,2012年9月22日至24日,在宁波召开了第二届中国穿支皮瓣高峰论坛,与会专家就特殊形式穿支皮瓣的名词术语与定义达成了如下共识。
鱼腥草的组织结构研究

目的揭示鱼腥草叶、地上茎、地下茎的组织结构以及挥发油的贮藏组织。方法应用横切片、表面制片和粉末制片进行显微镜观察定位。结果鱼腥草的叶为异面叶,下表皮内侧有1列油细胞;地上茎和地下茎具有双子叶植物草质茎的典型特征,无限外韧维管束成环状排列,皮层、髓、髓射线中分布有较多的油细胞。结论鱼腥草的叶、地上茎、地下茎中大量的油细胞是挥发油的贮藏部位。
Investigation on Key Technologies in Large-Scale MIMO

Large-scale MIMO (multiple-input multiple-output) systems with numerous low-power antennas can provide better performance in terms of spectrum effciency, power saving and link reliability than conventional MIMO. For large-scale MIMO, there are several technical issues that need to be practically addressed (e.g., pilot pattern design and low-power transmission design) and theoretically addressed (e.g., capacity bound, channel estimation, and power allocation strategies). In this paper, we analyze the sum rate upper bound of large-scale MIMO, investigate its key technologies including channel estimation, downlink precoding, and uplink detection. We also present some perspectives concerning new channel modeling approaches, advanced user scheduling algorithms, etc.
鼻咽癌放化疗后并发Graves病1例报道

放疗是头颈部肿瘤有效的治疗手段,也是鼻咽癌治疗的首选方法。在鼻咽癌放射治疗过程中,由于其丰富的颈部淋巴引流,甲状腺被部分或全部包括在照射野内。甲状腺受到较高剂量的照射,常常出现辐射诱导损伤,导致多种甲状腺功能紊乱,主要表现为甲状腺功能减退。另外,鼻咽癌放疗导致垂体接受较高剂量的照射,也可以引起中枢性的甲状腺功能减退。而鼻咽癌放疗后引起甲状腺功能亢进临床极为少见。现将我院收治的鼻咽癌放化疗后两年出现Graves病1例报道如下。
从H7N9禽流行性感冒谈新发传染病防控的重要性

新发和再现传染病是指新出现的、再度肆虐的或死灰复燃的传染病,包括已存在的病原体由于变异或进化导致的新传染病、原先未被认识的传染病、已知传染病扩散到新的地理区域或人群、已被控制的传染病由于抗药性的改变或公共卫生措施的削弱而重新出现或再度流行。随着社会环境和人类生产生活方式的变化以及国内外人员流动的增加,各种新发和再现传染病不断出现,且在全球传播和流行,新发、突发传染病仍是严重威胁人类健康的重要疾病,人类与这类疾病的抗争远未结束。近年来,新发传染病的频繁出现,严重威胁人类的健康,影响国家经济和社会发展,因此,加强传染病研究和公共卫生人才的建设,增加资金的投入,提高公众的健康意识,加强环境的监测和保护,是应对新发传染病的关键措施。