mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Discovery of MicroRNAs Associated with the S Type Cytoplasmic Male Sterility in Maize

MicroRNAs (miRNAs) are endogenous small RNAs that play important regulatory roles in the growth and development processes of plants and animals. In this study, we examined the expression profiles of pollen miRNAs from a maize S type cytoplasmic male sterile line and its fertility restored line. In total, 100 known miRNAs belonging to 20 families and 81 novel miRNAs belonging to 44 families were identified. Two and seven known miRNAs had significant expression difference between the two lines at the level of P-value<0.01 and 0.01
急诊腔内程序刺激并心室起搏治疗顽固性室性心动过速

室性心动过速(ventricular tachycardia,VT),简称室速,可见于心脏结构正常及器质性心脏病者,如冠状动脉粥样硬化性心脏病,扩张型心肌病等~[1],也可见于电解质紊乱,使用影响心室复极药物的人群。无论何种病因,室速持续或反复发作均可使心功能恶化,出现血流动力学不稳定,甚至出现心室电风暴或蜕变为室颤,导致猝死~[1-2]。埋藏式心律转复除颤器(implantable cardiacdefibrillatior, ICD)是治疗器质性心脏病室速的有效手段之一,其无痛性的抗心动过速起搏能够安全有效地终止快频率室速,并减少ICD或埋藏式三腔起搏除颤器(cardiac resynchronization therapy with defibrilator, CRT-D)的放电治疗~[3-9], 从而减少因放电而引起的病死率增高~[10-11]。心腔内程序刺激终止室速后辅以心室起搏抑制室速持续发作的方法,国内外鲜有报道;南京医科大学第一附属医院急诊中心对一组药物反应差,电复律后反复发作的室速患者应用此方法,来稳定血流动力学,改善心功能,为后期的诊治作准备。
三代头孢菌素耐药志贺菌产超广谱β内酰胺酶基因型研究

产超广谱β内酰胺酶(extended spectrum beta lactamase,ESBL)主要分为CTX-M、TEM、SHV、OXA 和其他类等5种。目前,CTX-M型ESBL为世界范围内流行的主要型别,其按核苷酸序列亲缘性分为5组,即CTX-M-1、2、8、9、25/26,基因型已超过80种,其中CTX-M-1和CTX-M-9组最为常见,分别有31和32种基因亚型。CTX-M因核苷酸突变而产生不同型别。这种突变导致CTX-M对水解头孢噻肟(CTX)和头孢他啶(CAZ)的能力出现差异, 从而表现不同的耐药表型。以往研究主要针对肺炎克雷伯菌和大肠埃希菌,而产ESBL志贺菌的研究鲜见报道。本研究对55株产ESBL志贺菌的基因型别及三代头孢的耐药表型进行研究,以了解这类细菌的特征。
脑梗死康复过程中血管生成的MRI评估

脑梗死是指各种原因引起的脑部血液供应障碍,导致脑组织缺血、缺氧性坏死。它是导致患者死亡以及残疾的主要疾病之一。在以往研究中,MRI对脑梗死患者急性期的评估发挥了重要作用,主要体现在脑梗死的早期检测以及可逆性脑组织损伤的发现。然而,只有极少数的脑梗死患者可以在4.5h的时间窗之内到达医院并接受溶栓治疗。因此,更多针对脑梗死患者康复期的治疗逐渐受到重视,这也进一步推动了对治疗机制的探究。研究表明,脑梗死后24 h至数周内基于细胞或药理的神经康复治疗能够促进大脑重组,大幅度提高功能康复。这一过程不仅涉及神经元重组,还包括血管重塑。而且,越来越多的研究表明,脑梗死后的血管生成有助于改善神经功能。目前对脑梗死后血管生成的显示主要依赖于组织学检测,而MRI作为一种先进的检查手段,可以无创、动态地观察这一过程。
A second order isoparametric finite element method for elliptic interface problems

A second order isoparametric finite element method (IPFEM) is proposed for elliptic interface problems. It yields better accuracy than some existing second-order methods, when the coefficients or the flux across the immersed curved interface is discontinuous. Based on an initial Cartesian mesh, a mesh optimization strategy is presented by employing curved boundary elements at the interface, and an incomplete quadratic finite element space is constructed on the optimized mesh. It turns out that the number of curved boundary elements is far less than that of the straight one, and the total degree of freedom is almost the same as the uniform Cartesian mesh. Numerical examples with simple and complicated geometrical interfaces demonstrate the efficiency of the proposed method.
细菌磁颗粒实时荧光RT-PCR检测菜豆荚斑驳病毒

菜豆荚斑驳病毒(Bean pod mottle virus,BPMV)属豇豆花叶病毒科Comoviridae豇豆花叶病毒属Comovirus成员,主要侵染大豆、菜豆等豆科植物,可通过种子远距离传播,造成大豆产量和品质下降。目前,该病毒主要分布于美国、巴西等国家,在我国属禁止进境的检疫性有害生物。因此,建立一种简便、快捷、灵敏的植物病毒检测方法,对于提高口岸检疫工作效率具有十分重要的意义。
对《影响半径稳定井流模型与可持续开采量:地下水动力学一个基本理论问题的分歧》一文的理解与体会

《水利学报》本着负责的态度,及时转发了读者来信所关切的3个问题。陈崇希、薛禹群两位先生先后发表了相应的观点。其引经据典的探究、措辞犀利的辩驳,理清了原来模糊、甚至错误的概念和观点,使人获益匪浅。结合对两文的理解与体会,本文试图比较明白地回答读者所关注的问题。
Influence of endogenous ciliary neurotrophic factor on neural differentiation of adult rat hippocampal progenitors

Ciliary neurotrophic factor is the only known neurotrophic factor that can promote differentiation of hippocampal neural progenitor cells to glial cells and neurons in adult rats. This process is similar to spontaneous differentiation. Therefore, ciliary neurotrophic factor may be involved in spontaneous differentiation of neural stem cells. To verify this hypothesis, the present study isolated neural progenitor cells from adult male rats and cultured them in vitro. Results showed that when neural progenitor cells were cultured in the absence of mitogen fibroblast growth factor-2 or epidermal growth factor, they underwent spontaneous differentiation into neurons and glial cells. Western blot and immunocytochemical staining showed that exogenous ciliary neurotrophic factor strongly induced adult hippocampal progenitor cells to differentiate into neurons and glial cells. Moreover, passage 4 adult hippocampal progenitor cells expressed high levels of endogenous ciliary neurotrophic factor, and a neutralizing antibody against ciliary neurotrophic factor prevented the spontaneous neuronal and glial differentiation of adult hippocampal progenitor cells. These results suggest that the spontaneous differentiation of adult hippocampal progenitor cells is mediated partially by endogenous ciliary neurotrophic factor.
Hydrogen Sulfide Regulates Ethylene-induced Stomatal Closure in Arabidopsis thaliana

Hydrogen sulfide (H_2S) is a newly-discovered signaling molecule in plants and has caused increasing attention in recent years, but its function in stomatal movement is unclear. In plants, H_2S is synthesized via cysteine degradation catalyzed by D-/L-cysteine desulfhydrase (D-/L-CDes). AtD-/L-CDes::GUS transgenic Arabidopsis thaliana (L.) Heynh. plants were generated and used to investigate gene expression patterns, and results showed that AtD-/L-CDes can be expressed in guard cells. We also determined the subcellular localization of AtD-/L-CDes using transgenic plants of AtD-/L-CDes::GFP, and the results showed that AtD-CDes and AtL-CDes are located in the chloroplast and in the cytoplasm, respectively. The transcript levels of AtD-CDes and AtL-CDes were affected by the chemicals that cause stomatal closure. Among these factors, ACC, a precursor of ethylene, has the most significant effect, which indicates that the H_2S generated from D-/L-CDes may play an important role in ethylene-induced stomatal closure. Meanwhile, H_2S synthetic inhibitors significantly inhibited ethylene-induced stomatal closure in Arabidopsis. Ethylene treatment caused an increase of H_2S production and of AtD-/L-CDes activity in Arabidopsis leaves. AtD-/L-CDes over-expressing plants exhibited enhanced induction of stomatal closure compared to the wild-type after ethylene treatment; however, the effect was not observed in the Atd-cdes and Atl-cdes mutants. In conclusion, our results suggest that the D-/L-CDes-generated H_2S is involved in the regulation of ethylene-induced stomatal closure in Arabidopsis thaliana.
OsLEC1/OsHAP3E Participates in the Determination of Meristem Identity in Both Vegetative and Reproductive Developments of Rice

In the vegetative phase of plant development, the shoot apical meristem (SAM) produces leaf primordia in regular phyllotaxy, and transforms to the inflorescence meristem when the plant enters reproductive growth, which will undergo a series of identity differentiations and will finally form a complete and fertile panicle. Our previous studies indicated a tissue-specific expression pattern of the OsLEC1 (leafy cotyledon) gene, which is homologous to the Arabidopsis AtLEC1 gene and belongs to the CCAATbinding protein HAP3 subfamily, during embryo development. Expression of additional OsLEC1 genomic sequences resulted in abnormalities in the development of leaves, panicles and spikelets. The spikelets in particular presented abnormities, including panicle and spikelet-like structures that occurred reiteratively inside prior spikelets, and the occasional spikelet structures that completely transformed into plantlets (a reproductive habit alteration from sexual to asexual called “pseudovivipary”). Analysis showed that OsLEC1 interacts with several SEPALLATA-like MADS transcription factors, suggesting that increased levels of the OsLEC1 protein might interfere with the normal interaction network of these MADS proteins and lead to defective spikelet development. The expression of OsMADS1 was dramatically reduced, and the DNA methylation level of cytosine in certain regions of the OsMADS1 promoter was increased under OsLEC1 overexpression. These results indicate that OsLEC1 affects the development of leaves, panicles and spikelets, and is a key regulator of meristem identity determination in both rice (Oryza sativa) vegetative and reproductive development.
Quadratic Residues and Non-residues for Infinitely Many Piatetski-Shapiro Primes

In this paper, we prove a quantitative version of the statement that every nonempty finite subset of N~+ is a set of quadratic residues for infinitely many primes of the form [n~c] with 1 ≤ c ≤ 243/205. Correspondingly, we can obtain a similar result for the case of quadratic non-residues under reasonable assumptions. These results generalize the previous ones obtained by Wright in certain aspects.
人椎间盘髓核组织工程研究进展

腰痛是老年人群中的常见病和多发病,构成了一个可观的流行病学和经济学问题。尽管目前医学的诊断及治疗技术不断进步,但随老年人逐渐增多,发病率表现为上升趋势。腰痛造成极大的经济负担,在英国每年导致花费120亿英镑,美国为1 000亿美元。尽管引起腰痛的原因有许多,但是一个很明显的原因是与椎间盘(IVD)的退变密切相关。组织工程提供了将已退变的椎间盘恢复正常功能的方法,具有光明的前景。大多数研究直接指向了髓核(NP)组织工程,因为间盘退变被认为起源于NP区域,在过去10年中,对于这个问题已取得了相当大的进展。
含单侧皮肤耳廓游离复合组织瓣联合鼻唇沟皮瓣修复老年单侧鼻翼全层缺损18例

常因受到外界创伤、感染以及各种皮肤肿瘤手术后而形成组织缺损,特别是老年患者,因身体功能衰退,免疫功能逐步下降,鼻部受到损伤因素作用后更易形成组织缺损。因此,修复各种损伤因素所致的老年患者鼻翼组织全层缺损一直是整形外科医师的重大挑战之一。耳廓游离复合组织瓣是修复鼻翼缺损非常好的结构体,鼻唇沟皮瓣皮肤与鼻翼皮肤色泽、质地非常接近,且血运良好,创面可以一期直接闭合〔2~4〕,是修复鼻翼缺损良好的外被供区,将二者巧妙地结合,易达到较佳的临床效果。自2008年3月至2012年3月,我科应用含单侧皮肤耳廓游离复合组织瓣(保留耳廓前侧及约1/2耳轮缘顶部皮肤组织)联合鼻唇沟轴型皮瓣法为18例老年患者修复了较大面积的单侧鼻翼组织全层缺损,效果满意。
高渗盐水对大鼠肝脏缺血再灌注损伤的保护作用及其机制

目的研究高渗盐水(7.5%氯化钠注射液)对大鼠肝脏缺血再灌注损伤的影响,并探讨其作用机制。方法清洁健康雄性SD大鼠60只,体重220~260 g,随机分为4组:假手术组(Ⅰ组,Sham组)、缺血再灌注组(Ⅱ组,IR组)、缺血预处理组(Ⅲ组,IP组)、高渗盐水预处理组(Ⅳ组,HTS组)每组15只。制作70%肝脏缺血再灌注模型,肝脏缺血40 min,再灌注1、6、24 h三个亚组,每个亚组5只。测定血清谷草转氨酶(AST)、谷丙转氨酶(ALT)、一氧化氮(NO)、内皮素-1(ET-1)、肿瘤坏死因子-α(TNF-α)和白介素-10(IL-10)的水平及再灌注6 h后的肝组织病理学改变。免疫组化法检测再灌注6 h的肝组织Bcl-2及Bax的表达;TUNEL法检测肝细胞凋亡指数(AI)。结果IR组、IP组及HTS组各时点AST、ALT、Bax及AI较同时点Sham组高,IL-10、NO且及Bcl-2水平较Sham组低,肝组织病理学损害重于Sham组;HTS组及IP组各时点AST、ALT、TNF-α、ET-1、Bax及AI较同时点IR组低,HTS组最低,且IL-10、NO及Bcl-2水平较IR组高,HTS组最高,肝组织病理学损害明显轻于IR组,HTS组最轻。结论HTS可以通过抑制血清TNF-α的升高、维持IL-10的水平,抑制肝组织Bax的表达,促进Bcl-2的表达,抑制肝细胞凋亡,从而减轻肝脏缺血再灌注损伤。
冠心病、高血压与血清同型半胱氨酸、超敏C反应蛋白的相关性

目的分析血清同型半胱氨酸(Hcy)、超敏C反应蛋白(hs-CRP)在预测高血压并发心血管事件及冠心病不同病变阶段的作用,揭示二者与Hcy、hs-CRP的相关性。方法按要求筛选合格病例,循环酶法检测血清Hcy,激光散射比浊法测定hs-CRP,彩色多普勒超声测定颈动脉粥样硬化病变,应用造影确定血管狭窄和病变程度。结果冠心病、高血压各亚组hs-CRP、Hcy较对照组升高(P<0.01);冠心病三支病变组hs-CRP水平比单支组升高(P<0.05);冠心病完全闭塞组Hcy、hs-CRP水平较中度、重度狭窄组升高(P<0.01)。高血压高、中值组Hcy、hs-CRP水平较冠心病组、高血压低值组升高(P<0.05),高值组较中值组也升高(P<0.05)。高血压不同hcy水平组、冠心病组动脉粥样硬化检出率较对照组高(P<0.01);C组检出率高于其他组,B组高于A组、冠心病组(P<0.05)。结论高血压、冠心病患者血清Hcy水平明显升高,高血压患者血清Hcy水平处于高值时,颈动脉粥样硬化明显。
盆腔节细胞神经瘤超声表现1例

节细胞神经瘤是一种少见的源于交感神经节的良性肿瘤,以成年患者较多见,好发部位依次为后纵隔、腹膜后、肾上腺、咽后软组织等,主要由大量的黏液基质、成熟神经节细胞、施万细胞组成,胞浆丰富,组织间隙大,因此行CT平扫检查时常误认为囊性肿块,增强扫描时强化程度不明显。本例患者行CT检查提示包块呈囊性,MR检查提示包块呈长T1长T2信号,内信号较均匀,是由其病理基础决定的,超声检查却可明确包块为实质性低回声团,形态不规则,内可见伴彗星尾征的强回声斑块,提示肿块内含大量黏液基质成分。节细胞神经瘤为乏血供肿瘤,彩色多普勒显示未见明显彩色血流信号,与CT增强检查时强化程度不明显相符。超声检查时应注意将节细胞神经瘤与盆腔其他常见肿瘤如畸胎瘤、神经母细胞瘤、嗜铬细胞瘤等相鉴别:盆腔畸胎瘤多见于女性患者,表现为圆形、椭圆形或分叶状的回声不一团块,根据肿瘤成分的不同可呈现脂质分液征、面团征、瀑布征等特殊的声像图表现;神经母细胞瘤好发于儿童,容易发生骨转移及周围组织侵犯,肿瘤实质回声不均匀,瘤体内钙化较粗大;嗜铬细胞瘤常伴有阵发性高血压等临床症状,声像图上肿瘤回声可不均匀,常伴出血坏死,彩色多普勒示血流信号较明显。综上,节细胞神经瘤有包膜光整、回声较低、内部可见细小强回声斑块、血流信号不丰富等声像图特点,超声检查能够通过经腹及经直肠等方法进行多方位多角度成像,帮助手术医师充分了解肿块性质以及与周围器官的关系,为临床提供更丰富的术前诊断信息。
Effects of soil water and nitrogen availability on photosynthesis and water use efficiency of Robinia pseudoacacia seedlings

The efficient use of water and nitrogen (N) to promote growth and increase yield of fruit trees and crops is well studied.However,little is known about their effects on woody plants growing in arid and semiarid areas with limited water and N availability.To examine the effects of water and N supply on early growth and water use efficiency (WUE) of trees on dry soils,one-year-old seedlings of Robinia pseudoacacia were exposed to three soil water contents (non-limiting,medium drought,and severe drought) as well as to low and high N levels,for four months.Photosynthetic parameters,leaf instantaneous WUE (WUEi) and whole tree WUE (WUEb) were determined.Results showed that,independent of N levels,increasing soil water content enhanced the tree transpiration rate (Tr),stomatal conductance (Gs),intercellular CO2 concentration (Ci),maximum net assimilation rate (Amax),apparent quantum yield (AQY),the range of photosynthetically active radiation (PAR) due to both reduced light compensation point and enhanced light saturation point,and dark respiration rate (Rd),resulting in a higher net photosynthetic rate (Pn) and a significantly increased whole tree biomass.Consequently,WUEi and WUEb were reduced at low N,whereas WUE i was enhanced at high N levels.Irrespective of soil water availability,N supply enhanced Pn in association with an increase of Gs and Ci and a decrease of the stomatal limitation value (Ls),while Tr remained unchanged.Biomass and WUEi increased under non-limiting water conditions and medium drought,as well as WUEb under all water conditions;but under severe drought,WUEi and biomass were not affected by N application.In conclusion,increasing soil water availability improves photosynthetic capacity and biomass accumulation under low and high N levels,but its effects on WUE vary with soil N levels.N supply increased Pn and WUE,but under severe drought,N supply did not enhance WUEi and biomass.
An improved GC-ECD method for measuring atmospheric N_2O

Gas chromatography equipped with an electron capture detector (GC-ECD) has been widely used for measuring atmospheric N_2O,but nonlinear response and the influence of atmospheric CO_2 have been recognized as defects for quantification.An original GCECD method using N_2 as carrier gas was improved by introducing a small flow rate of CO_2 makeup gas into the ECD,which could well remedy the above defects.The N_2O signal of the improved method was 4-fold higher than that of the original method and the relative standard deviation was reduced from > 1% to 0.31%.N_2O concentrations with different CO_2 concentrations (172.2×10~(-6)-1722×10~(-6)mol/mol) measured by the improved GC-ECD method were in line with the actual N_2O concentrations.However,the N_2O concentrations detected by the original method were largely biased with a variation range of-4.5%~7%.The N_2O fluxes between an agricultural field and the atmosphere measured by the original method were greatly overestimated in comparison with those measured by the improved method.Good linear correlation (R~2=0.9996) between the response of the improved ECD and N_2O concentrations (93×10~(-9)-1966×10~(-9)mol/mol) indicated that atmospheric N_2O could be accurately quantified via a single standard gas.Atmospheric N_2O concentrations comparatively measured by the improved method and a high precision GC-ECD method were in good agreement.
Distribution characteristics and source identification of polychlorinated dibenzo-p-dioxin and dibenzofurans,and dioxin-like polychlorinated biphenyls in the waters from River Kanzaki,running through Osaka urban area,Japan

This is the first to elucidate the distribution and sources of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/PCDFs),and dioxin-like polychlorinated biphenyls in the waters from Kanzaki River,which is one of the most heavily polluted rivers in Japan.The World Health Organization (WHO)-toxic equivalent quantities (TEQs) in waters from the mainstream exceeded the Japanese environmental standard (1.0 pg-TEQ/L).The PCDD/PCDFs were dominated by highly chlorinated DFs,which predominantly contributed to the WHO-TEQs,suggesting that the main causes would be the incineration-related wastes.To find the sources,the dioxin congener concentrations in water and sediment samples from its tributary small waterways were determined.Abnormally high WHO-TEQs were detected in a water (50 pg-TEQ/L) and a sediment sample (41,000 ng-TEQ/kg dry weight) near the industrial solid waste incinerators (ISWIs).The PCDD/PCDF characteristics agreed well with those of the incinerator-related wastes as seen in the mainstream.These facts indicate that the dioxin pollution in the mainstream could be largely related to the industrial wastes from the ISWIs.Here,a TEQ apportionment method was used to understand the contribution of the pyrogenic sources to the WHO-TEQs.The average contribution ratios of the pyrogenic sources to WHO-TEQs were more than 80% for river waters from the mainstream,indicating that the elevated WHO-TEQs in the mainstream had been largely caused by the ISWIs.
Complete Boolean Satisfiability Solving Algorithms Based on Local Search

Boolean satisfiability (SAT) is a well-known problem in computer science, artificial intelligence, and operations research. This paper focuses on the satisfiability problem of Model RB structure that is similar to graph coloring problems and others. We propose a translation method and three effective complete SAT solving algorithms based on the characterization of Model RB structure. We translate clauses into a graph with exclusive sets and relative sets. In order to reduce search depth, we determine search order using vertex weights and clique in the graph. The results show that our algorithms are much more effective than the best SAT solvers in numerous Model RB benchmarks, especially in those large benchmark instances.
Deployment dynamics of a simplified spinning IKAROS solar sail via absolute coordinate based method

The spinning solar sail of large scale has been well developed in recent years. Such a solar sail can be considered as a rigid-flexible multibody system mainly composed of a spinning central rigid hub, a number of flexible thin tethers, sail membranes, and tip masses. A simplified interplanetary kite-craft accelerated by radiation of the Sun (IKAROS) model is established in this study by using the absolute-coordinate-based (ACB) method that combines the natural coordinate formulation (NCF) describing the central rigid hub and the absolute nodal coordinate formulation (ANCF) describing flexible parts. The initial configuration of the system in the second-stage deployment is determined through both dynamic and static analyses. The huge set of stiff equations of system dynamics is solved by using the generalized-alpha method, and thus the deployment dynamics of the system can be well understood.
Hypersonic boundary-layer transition on a flared cone

Transition on a flared cone with zero angle of attack was studied in our newly established Mach 6 quiet wind tunnel (M6QT) via wall pressure measurement and flow visualization. High-frequency pressure transducers were used to measure the second-mode waves' amplitudes and frequencies. Using pulsed schlieren diagnostic and Rayleigh scattering technique, we got a clear evolution of the second-mode disturbances. The second-mode waves exist for a long distance, which means that the second-mode waves grow linearly in a large region. Strong Mach waves are radiated from the edge of the boundary layer. With further development, the second-mode waves reach their maximum magnitude and harmonics of the second-mode instability appear. Then the disturbances grow nonlinearly. The second modes become weak and merge with each other. Finally, the nonlinear interaction of disturbance leads to a relatively quiet zone, which further breaks down, resulting in the transition of the boundary layer. Our results show that transition is determined by the second mode. The quiet zone before the final breakdown is observed in flow visualization for the first time. Eventual transition requires the presence of a quiet zone generated by nonlinear interactions.
黏液水肿性苔藓自行缓解一例

讨论2001年Rongioletti首次应用“黏液水肿性苔藓”概括了硬化性黏液水肿和丘疹性黏蛋白沉积症，并将黏液水肿性苔藓分为3型：硬化性黏液水肿型，局限苔藓斑块型以及中间型。到2009年止，黏液水肿性苔藓国外报道不足150例，我国现已报道了20余例。硬化性黏液水肿是黏液水肿性苔藓一亚型,具有以下特点：①泛发性的丘疹和硬化性皮损；②病理示黏蛋白沉积，成纤维细胞增殖及胶原增生；③血浆中γ球蛋白阳性；④甲状腺未受累；⑤往往有皮肤外的系统受累。本文患者符合以上②、③、④的特点，另有以下特征:丘疹仅限于颜面,缺乏泛发性的丘疹和硬化性皮损，伴有弥漫性色素沉着。参考以往文献，典型的黏液水肿性苔藓多不伴有弥漫性色素沉着，而硬化型可伴有，是否可以考虑本患者为硬化性黏液水肿的特殊类型尚有待商榷，或许此种类型皮疹具有在病程中自行缓解的倾向。
可回收腔静脉滤器在溶栓导管治疗下肢深静脉血栓中预防肺动脉栓塞的临床研究

下肢深静脉血栓(deep venous thrombosis,DVT)形成作为血管外科常见病,发病率逐年升高,引起的肺动脉栓塞(pulmonary embolism,PE)是造成患者猝死的主要原因。下腔静脉滤器(inferior vena cava filter,IVCF)可降低PE的发生和预防致死性PE,其中近年可回收性IVCF的有效性及安全性得到证实并有了很大发展。在下肢DVT形成的治疗中,溶栓导管作为一种新的介入治疗手段,在临床治疗中显示出良好的疗效和安全性[1-2]。本研究在2009年8月-2011年12月间在68例溶栓导管治疗下肢DVT患者中应用国产Aegisy可回收IVCF预防PE,效果满意,现报道如下。
经骶前间隙轴向腰椎间融合术的研究进展

轴向腰椎间融合术(axial lumbar interbody fusion,AxiaLIF)是一种新兴的微创经骶前间隙入路的腰骶椎间融合技术,由Cragg等[1]最先于2004年提出,其巧妙利用特殊解剖通道,避免暴露脊柱前方、后方及侧方的结构,不破坏双侧关节突关节及椎旁肌肉、韧带等结构,不显露神经根和硬膜囊,无需进入腹腔以免牵拉血管和腹腔内脏器,避免了神经根和其他重要结构的破坏,达到真正微创的目的。而且,AxiaLIF保留了纤维环和前后纵韧带的完整性,使脊柱融合节段得到最大程度支持和力学稳定。笔者就AxiaLIF的可行性、操作技术及临床应用等方面进展综述如下。
The Efficiency Improvement of Blue InGaN Multiple Quantum-Well Light-Emitting Diodes with AlGaN/InGaN Superlattice Barriers

The characteristics of blue InGaN light emitting diodes with AlGaN/InGaN superlattice barriers are investigated. The efficiency droop can be improved when AlGaN/InGaN superlattice barriers are used. This improvement can be attributed to the reduced polarization effect in the active region by using AlGaN/InGaN superlattice barriers.
Improvement of Ni Silicide Thermal Stability By Using Vanadium Elements

Ni silicide thermal stability is improved by the use of a Ni-V (nickel vanadium) alloy target. The relationship between the formation temperature and the thermal stability of Ni silicide is investigated. The sheet resistance after the formation of Ni silicide with the Ni-V shows stable characteristics up to a rapid-thermal-process temperature of 700°C, while degradation of sheet resistance starts at that temperature in the case of pure-Ni. Moreover, the thermal stability improvement is demonstrated by the post-silicidation annealing. It is considered that the thermal robustness of Ni-V silicide is highly dependent on the formation temperature. With the increasing silicidation temperature (around 700°C), more thermally stable Ni silicide is formed in comparison to the low-temperature case using the Ni-V. A Ni-V alloy target is utilized to form Ni silicide. The V and the V-trap complexes are explained to block the transformation from NiSi to NiSi_2 so as to improve the Ni silicide thermal stability.
Bubble Motion in Transformer Oil under Non-Uniform Electric Fields

We investigate the bubble motion in transformer oil under a typical non-uniform electric field. Based on the principle of virtual work, an analytical equation is derived for the electric force putting on the bubbles. The bubble’s visualized motion graphics are then obtained by using the finite-element method, which utilizes Comsol Multiphysics software. The effects of bubble radius and release position on the motion trajectory are studied. It is found that, under the non-uniform electric field, the bubbles have a long residence time between the electrodes. This accordingly can lead to a higher probability of forming a bubble-bridge along the bubble motion trajectory. The bubbles with a particular radius or release position are easier to form bubble-bridge between the electrodes. They can increase the chance of liquid breakdown.
Fabrication of P-Type ZnO:N Film by Radio-Frequency Magnetron Sputtering for Extremely Thin Absorber Solar Cell Applications

We successfully fabricate p-type ZnO:N films by using rf magnetron sputtering and in situ annealing in O_2 atmosphere. These p-type ZnO:N films can be used as p-type window materials for extremely thin absorber (ETA) solar cells composed of quartz glass/p-ZnO:N/i-ZnO/CdSe/i-ZnO/n-ZnO:Al. The short-circuit photocurrent density, open circuit voltage, fill factor and conversion efficiency of the ETA solar cells can be determined to be 8.549mA/cm~2, 0.702 V, 0.437 and 2.623%, respectively, through measurements of photovoltaic properties under illumination with a 100mW/cm~2 at air-mass (AM) 1.5.