mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Numerical Simulation of Particle Densities Distributions in Atmospheric Pressure Ar/SiH_4/H_2 Mixed Plasma Under Very High Frequency Excitation

To improve the microcrystalline silicon thin film deposition in quality and to increase its microcrystalline silicon content, we numerically investigated the characteristics of homogeneous discharges in hydrogen diluted silane and argon mixed gases at atmospheric pressure are numerically investigated using a two-dimensional fluid model. The model takes into account the primary processes of excitation and ionization, sixteen reactions of radicals with radicals in silane/hydrogen/argon discharges are taken into account, so this model can adequately describe the discharge plasma. The effects of very high frequency (VHF) excitation on the electron density in such discharges are analyzed using the model. The simulation results show that the electron density does not linearly vary with the excitation frequency increase within from 90 MHz to 150 MHz. The maximum value electron density occurs at an appropriate excitation frequency i.e. called the transition frequency. Increase of the excitation frequency would effectively increase the electron density before the transition frequency, but decreases the density afterwards. The electron density is very important for the film growth. Moreover, the densities of involved particle species, including (H_2~+, H, Ar~*, Ar~+, SiH_3~+, SiH_3~- SiH_3, SiH_2) are closely interrelated.
Different Ablation Models for the Wall-plasma Interaction Process in Pulsed Plasma Thruster

Ablation excited by current pulses is a very critical physical process in pulse plasma thrusters (PPT). Its effects on wall-plasma interaction directly determine the PPT performances. In order to reveal the process of the ablated wall interaction with the discharge plasma in PPT, ablation models formulated by three different boundary conditions at the wall-plasma interface are studied. These are the two widely used high-speed evaporation models (Model-L and Model-M), and the recently developed Keida-Zaghloul model (Model-K) of the Knudsen layer that takes into account the internal degrees of freedom on the energy flux conservation. First, fundamental mechanisms of the three ablation models are clarified by comparative analysis in order to gain a comprehensive understanding of the wall-plasma interaction. Then, the applicability of different ablation models with the numerical solutions of LES-6 PPT is investigated in detail using magnetohydrody-namic (MHD) modeling. Results show that Model-L and Model-M are actually special cases of Model-K when a simplified jump conditions limited by high velocity at the vapor/plasma interface is used; A ratio of ablation rate in Model-L to that in Model-M is about 0.8 at the same wall surface temperature, while it rises to 1 at different surface temperature determined by Model-L and Model-M in PPT. Even though Model-K solution requires significant computational time, it shows more accurate ablation feature for the wall-plasma interaction and possesses better computing precision of impulse bit during post-pulse which is useful for future studies of the late time ablation.
Direct Current Interruption with RLC Circuit-convoluted Arc Interaction

Investigations are reported into the use of an electromagnetically convoluted arc, external to a magnetic field (B-field) rproducing coil, in combination with a parallel R, L, C resonant circuit for interrupting quasi-steady currents. In order to elucidate the complex interactions between the arc, B-field and R, L, C circuit, the B-field producing coil is energised independently from the current to be interrupted and the R, L, C circuit. Experimental results are presented for the time variation of the currents flowing through the arc gap, the B-field coil and the parallel R, L, C circuit, along with the voltage across the arc gap. An insight is gained into the role of various effects, which are produced by the complex interactions and which might be used to advantage for direct current interruption.
Investigation of a CO_2 Switching Arc Using Spectroscopic Diagnostics and Computational Fluid Dynamics Simulations

A deep understanding of the physical processes coming along with the current interruption in high voltage circuit breakers is essential for the optimization of today's switching technologies. Therefore a switching arc in a model circuit breaker is studied by means of computational fluid dynamics (CFD) simulations and optical emission spectroscopy (OES) in this contribution. Experimental investigations are performed in carbon dioxide (CO_2) at absolute filling pressures of 0.1 and 0.5 MPa. CFD simulations are carried out based on a model of the arcing zone including a consistent treatment of the radiation transport and the wall ablation. Carbon ion line radiation is analysed in the experiment using an optical path in the heating channel between the electrodes inside the nozzle system. The pressure value in the arc is estimated based on the line width-intensity dependence. Obtained values correspond to the measured pressure outside the arc. For the temperature profiles, a good agreement within the accuracy of the approaches is observed between the CFD simulations and the results of OES.
Optical Diagnostics of Atmospheric Pressure Argon Gliding Arc Discharge

This work is devoted to the experimental investigation of an AC argon gliding arc discharge at atmospheric pressure. The dynamic behaviour of the argon gliding arc plasma is investigated by the oscillations of the electrical signals, while the time-resolved arc root motion behaviour on the electrode wall is analyzed by high-speed photography. It is found that the anode and cathode arc roots exhibit different motion behaviour on the electrode surface. In addition, emission spectroscopic technique has been employed to determine the axial distribution of the gas temperature and electron density in the argon gliding arc plasma.
Characteristics of Surface Micro-discharge Excited by Pulsed Voltage in Open Air

The surface micro-discharge (SMD) excited by pulsed voltage in open air is experimentally studied by measuring its voltage, current, emission image, emission spectrum, and ultraviolet (UV) absorption spectrum. It is found that the SMD occurs intermittently in each cycle, and that it consists of many filaments on the surface of grounded electrode. While the applied voltage's peak value U_p increases from 1.75 kV to 7.25 kV, the discharge area keeps expanding until U_p≈6 kV, when the discharge occupies all the available area. The emission spectrum of nitrogen metastable N_2(C-B) and the density of ozone increase almost linearly. The ozone density decreases hyperbolically downstream of the grounded electrode due to the diffusion in open air. The characteristics of pulsed SMD are presented and analyzed as well, which may be referred by further investigations.
Generation of Runaway Electrons in Atmospheric Pressure Air Under 30~200 kV Voltage Pulses of Rise Time 1.5 ns

A pulse generator with a voltage rise time of~1.5 ns and voltage amplitude variable from 30 kV to 200 kV was designed for generating runaway electron beams in atmospheric pressure air with different interelectrode gaps. The influence of the voltage amplitude and gap length on the generation was studied. In the gas diode geometry under study, the gap voltage at which the generation of a runaway electron beam begins was determined. Decreasing the voltage pulse amplitude does not increase the beam current pulse width measured with a time resolution of~0.1 ns. It is shown that the escape of beam electrons to the downstream of the foil is sync in time with the voltage drop across the gap, and that the delay of beam current generation increases gradually from 1.1 ns to 2.6 ns as the voltage pulse amplitude across the gap decreases from ~100 kV to 40 kV.
Inactivation Mechanisms of Escherichia Coli in Drinking Water Using Reactive Species Generated from a Surface Discharge

Bacterial and chemical contaminations of drinking water imperil the health of people. A reactive species injection method is presented for sterilizing drinking water. To produce reactive species, a gas phase surface discharge reactor (SDR) is designed: a spiral stainless steel wire attached on the inside wall of a quartz glass tube is used as the high voltage electrode, and the drinking water is the ground electrode. The performance and mechanisms of the method in inactivating of Escherichia coli (E. coli) are analyzed. Experimental results show that 500 mLE. coli-contaminated drinking water (10~8 CFU/mL) is completely sterilized within 4 min. Based on the scanning electron microscope (SEM) analysis, there were plasma-induced cell structure damages of the E. coli in the sterilized water, and the damage resulted in the leakage of protein, which was proved by chemical analyses. Meanwhile, the heating effect concomitantly generated by discharge plasma does not influence E. coli inactivation, and the contribution of direct ultraviolet (UV) irradiation could be neglected too. The ozone generated by SDR and the hydroxyl radicals (OH) subsequently generated in drinking water play the decisive roles in E. coli inactivation because these reactive species cause the cell rupture.
Generation of X-ray Emission in Repetitive Nanosecond-pulse Discharge at Atmospheric Pressure

Pulsed discharges can generate high power densities and high equivalent electric fields in plasma to emit X-rays, which is closely related to discharge mechanism. In this paper, discharge characteristics and X-ray emission of typical nanosecond-pulse discharges (corona, diffuse, spark or arc) are reviewed. Especially, the diffuse discharges are observed at pulse repetition frequencies up to 1 kHz. Factors influencing the discharge characteristics and X-ray emission are analyzed, such as the gap spacing, parameters of the applied pulse (amplitude, pulse repetition frequency), anode and cathode materials, and curvature radius of cathode. It is concluded that the maximum X-ray intensity is obtained in a diffuse discharge, and the X-ray intensity is affected by the pulse repetition frequency, applied voltage, anode material, and curvature radius of cathode. For example, X-ray intensity increases with the pulse repetition frequency and the atomic numbers of the anode material, but it decrease with the increase of curvature radius. It is also shown that the cathode material has no obvious influence on the X-ray intensity.
Electrical Discharges in Planetary Atmospheres: Review and Selected Experiments

Beyond Earth, electrical discharges have also been observed, or postulated to exist, on other bodies of the Solar System. In this work the state of the art of research on electrical discharges in the atmosphere of several planets and one moon is reported. The main charging mechanisms as well as the discharge characteristics and its effect on the atmosphere are discussed. Some of the current research activities being carried out by the author's team are also reported. The lab simulations can achieve realistic plasma parameters; for example: the arc temperature in the lab was found to be 33 000 K which compares favourably with field observations reporting temperatures ~ 30 000 K. The lab work with a synthetic Mars atmosphere allow us to predict that the conjunction of electrostatic discharges and the presence of water ice could lead to the production of methane with an efficiency of up to 10~(21) molecules per joule of applied energy.
Characteristics of Laser Produced Plasmas Obtained by Fast ICCD Photography, Schlieren Photography and Optical Emission Spectroscopy

Pulsed laser produced plasmas (LPP) are important for industrial applications and fimdamental researches, and their complex, multi-physical and cross-chemical processes need to be investigated more comprehensively. In this work, images of the luminous plasma, the spatial density distribution, and the plasma parameters are experimentally investigated by using fast ICCD photography, schlieren photography, and optical emission spectroscopy. Plasmas are produced by a 1 064 nm, 15 ns Nd:YAG laser. Free expanding and splitting phenomena are observed in vacuum (at the pressure of about 1×10~(-3) Pa) and air(at the pressure of 20 Pa) using fast photography, respectively. Meanwhile, shock waves formed in the atmospheric laser produced plasma are visualized by schlieren photography. The formation of shock waves is interpreted with the Sedov-Taylor theory, and an averaged expansion velocity about 375 m/s of the shock waves is estimated during 200~1 000 ns. Atmospheric air is found to have significant confinement effects on the plasma expansions compared to that in vacuum or low pressure ambient. Based on the optical emission spectroscopy, after 1 000 ns, at 0.6 mm above the target, the plasma temperature is about 7 800 K and the electron number density is approximately 0.64x10~(16) cm~(-3).
Study on the Detection Methods of DC Series Arc Fault

It is difficult to detect and extinguish direct current (DC) arc in power electronics systems, and the arc could easily lead to a fire and cause great damage to surrounding equipment. A DC arc generation simulation unit is established, in which DC series arcs are generated by dragging the moving electrode away from the fixed one with the help of the stepper motor. In addition, a ferrite rod antenna is used to receive the electromagnetic radiation signals induced by the arcs. Based on experiments using the unit, the general characteristics of DC arc, including the pulse characteristics of arc current and source output in corresponding time window, and the frequency-domain characteristics of arc current, are studied. With discussion on three detection methods, it is concluded that the variation of current and voltage of arc, the spectrum of the arc current during the discontinuous intervals and the radiating electromagnetic signal are all features that can be adopted for detecting DC series arc. Therefore, a synthetic judgment method is suggested for further study.
Fast Electrons Behind the Plane-grid Cathode at Nanosecond Discharge in Atmospheric Pressure Air

Breakdown of atmospheric pressure air gaps with combined design of the cathode at the voltage pulse rise rate equal to 10~(14) V/s has been studied with picoseconds' temporal resolution. Cathode assembly has a structure consisting of a flat thin foil and a grid of parallel foil thin wires. In the space behind the cathode foil a fast electron flow was recorded. The current value of the fast electron beam recorded behind the cathode is essentially influenced by the anode material. At a grid cathode and flat anode, the spectra of fast electrons generated both in direct (towards the anode) and reverse directions have been reconstructed by the attenuation curves.
Effectiveness of Radiofrequency Inductively Coupled Plasma Sources for Space Propulsion

Evolution of geometric forms of antenna coils for radiofrequency (RF) inductively coupled plasma (ICP) sources is analyzed. Top effectiveness of flat ICPSs generating plasma "tablet" is shown. Especially effective are ICPSs using antenna coils enhanced with ferromagnetic cores (FMICPS). It is found that the design of flat ICPSs is simpler and more convenient for the arrangement of plasma diagnostics in comparison with ICPSs of other geometries. Effective flat FMICPS models of different diameters ranging from 10 cm to 100 cm are considered. Recommendations are given for development engineers dealing with ICPS devices in general and with radio frequency ion thrusters (RITs) in particular.
Characteristics of the Large Area Surface Dielectric Barrier Discharge with a Multi-electrode Configuration

Surface gas discharge (SGD) plasmas have potential applications in the fields of active flow control, gas purification, heat transfer enhancement, etc. In order to obtain a uniform, stable and large-area SGD at atmosphere, a multi-electrode SGD plasma generator is designed in this paper. The major features of this newly-designed SGD plasma generator is as follows: the air-exposed upper grounded electrodes are made of nine tungsten wires and flush mounted on the dielectric PTFE barrier layer, while the lower powered electrode is made of a copper foil and encapsulated inside the PTFE material to avoid the ignition of the gas discharges below the dielectric barrier layer. The measurements on the electrical characteristics, fast imaging of discharges and the preliminary numerical analysis on the electric field distributions suggest that the multi-electrode configuration of the plasma generator plays a crucial role in enhancing the local electrical field, and subsequently, leads to the stable, quasi-uniform and large-area surface discharges.
县级医院定点支援:关注基层药物合理安全——《北京大学第一医院县级临床药师武乡培训班》纪实及专家访谈

编者按:伴随着近年来农村人口看病就医的需求剧增,我国的县级医院数量增长迅速,并逐渐成为农村人口首次就诊和疾病管理的重要渠道。县级医院的医生也在药物选择以及更改某些疾病治疗方案方面发挥着愈加重要的影响力。然而,目前国内的县级医院药师无论在数量上还是服务能力上均无法满足医院发展的基本需求,基本药物政策的实施、抗菌药物合理使用、合理用药管理、慢病管理等工作因缺少专业药师的参与而严重落后。这些工作质量的提高不仅需要政策的支持,更需要建立一套新的药师人才培养机制。
再谈只有科学认识才能推广应用MPDS的问题

伴随着医疗优先调度系统(medical priority dispatch system,MPDS)在我国的推广应用,有关MPDS问题越来越受到人们关注。深入研究与此有关的问题非常必要,但深入研究的前提与基础是要科学认识与此有关的问题。本刊曾于2011年12期刊发专题研究对此进行讨论,随着时间的推移与时俱进再次进行论述。
核因子-kB介导的炎性反应在大鼠深低温缺血再灌注所致急性肺损伤中的作用

深低温停循环术后肺部并发症发生率高达20%。其机制目前认为主要包括肺缺血再灌注损伤及炎性反应2个方面。我们应用核因子-kB(NF-KB)抑制剂吡咯烷二硫代氨基甲酸盐(PDTC)观察NF-kB介导的炎性反应在大鼠深低温缺血再灌注所致急性肺损伤中的作用。
Kinetic study of electrochemically induced Michael reaction of 1,4-dihydroxyanthraquinone with acetylacetone and benzoylacetone

The electrochemical oxidation of 1,4-dihydroxyanthraquinone has been studied in the presence of acetylacetone and benzoylacetone as nucleophiles in a mixture of ethanol/water by means of cyclic voltammetry as a diagnostic technique. The results indicate the participation of electrochemically produced anthraquinone in the Michael addition reaction with acetylacetone and benzoylacetone to form the corresponding new anthraquinone derivatives. On the basis of the EC mechanism, the observed homogeneous rate constants (k_(obs)) of the reaction of anthraquinone with acetylacetone and benzoylacetone were estimated by comparing the experimental cyclic voltammograms with the digitally simulated results.
Tungstophosphoric acid catalyzed synthesis of N-sulfonyl-1,2,3,4-tetrahydroisoquinoline analogs

An operationally simple and eco-friendly protocol has been developed for the synthesis of N-sulfonyl-1,2,3,4-tetrahydroisoquinolines 3 using the modified Pictet-Spengler reaction of N-sulfonylphenylethy-lamines 1 and various aldehydes 2 in the presence of tungstophosphoric acid hydrate.
“风应力强迫下北太平洋副热带环流与大气环流耦合调整的过程与机理”研究成果介绍

北太平洋副热带环流是指由北赤道流、黑潮及其延伸体、北太平洋流及加利福尼亚流等组成的位于北太平洋副热带海域的环流圈,是典型的风生环流系统。它是联系太平洋热带—副极地环流的纽带。该海区是太平洋气候年代际变化核心区域。北太平洋副热带环流系统的变异不仅会影响北太平洋能量输送与平衡,进而影响北太平洋大气环流和全球气候,并通过其强大的西边界流(黑潮)影响近中国海的环流和温盐结构。因此,北太平洋副热带环流在维系太平洋海洋热量平衡以及全球气候变化中起着重要的作用。
月经期性行为引空气栓塞死亡1例

空气栓塞是大量空气迅速进入血循环,形成气泡阻塞心血管,取决于进入的速度和气体量[1]。研究发现,急速静脉注射空气致实验狗立即死亡。空气进入人体致死量的问题,各学者意见不一,成人迅速进入血循环的空气量在100mL左右可导致心力衰。对于身体健康状况不良者静脉注入40mL空气就可致死。有报告一9岁女孩静脉注人30mL空气引起空气栓塞;也有报告静脉注入仅10mL空气形成空气栓塞致死的事例[2]。空气栓塞多见于医源性静脉空气栓塞,如徒手剥离胎盘、内倒转术、碎胎术、剖宫术、输卵管通气等。如阴道冲洗时避免让强劲的水流直接冲入阴道以防形成空气栓塞。又如女性流产或分娩时,子宫强烈收缩可将气体挤入子宫壁破裂的静脉窦内。还可见于性活动中,常发生在妊娠六个月以后和分娩不久的女性中,也可发生在月经期间[3]。
腿金属异物体内游走至肺部1例

通过上述分析可知,陈某右肺门所发现金属异物,为左小腿金属异物在体内游走所致,目前陈某右肺门金属异物滞留,无临床症状,无异物取除手术指征,参照GB/T16180-2006《劳动能力鉴定职工工伤与职业病致残等级》第B1.i.36条之规定,陈某右肺门金属异物滞留构成九级伤残。此后若出现肺功能损害等情况,其伤残等级需根据以后情况另行评定。
6例成人血管环的治疗

先天性血管环属于大动脉(主动脉弓及分支)畸形,因其包绕气管和/或食管,患者随年龄增长呈现程度不同的呼吸或吞咽困难,以及刺激性干咳、非特异性胸痛等症状,严重影响生活质量,甚至发生癌变。有报道,主动脉弓畸形合并食管癌,其病灶位于畸形大血管压迫食管处,可能导致食管腔变窄,长期刺激致该处食管黏膜增生。合并主动脉夹层者, 则表现剧烈胸背部疼痛。
国产偏心型封堵器在室间隔缺损外科封堵术中的应用

室间隔缺损(VSD)传统的治疗方法是体外循环下开胸手术,手术方法成熟,疗效确切,但创伤大,患者术后恢复时间长。另一种方法是经导管封堵术,但存在外周血管损伤、放射线损伤以及并发症发生率较高、对患者病理类型选择较为严格、出现意外情况时处理困难和费用昂贵等弊端。
HPLC波长切换法同时测定赤芍、大黄药对提取物中9个成分的含量

目的:建立HPLC波长切换法对赤芍、大黄药对提取物中9个成分(没食子酸、氧化芍药苷、芍药内酯苷、芍药苷、芦荟大黄素、大黄酸、大黄素、大黄酚、大黄素甲醚)进行分析。方法:采用Agilent Eclipse XDB-C_(18) (250mm×4.6 mm,5μm)色谱柱,以乙腈(A)-0.1%磷酸水(B)为流动相,梯度洗脱,流速1.0 mL/min,检测波长为267nm(0~13 min,没食子酸)、258 nm(13 -20 min,氧化芍药苷)、230 nm(20 - 45 min,芍药内酯苷、芍药苷)、254 nm(45 - 125 min,芦荟大黄素、大黄酸、大黄素、大黄酚、大黄素甲醚),柱温30°C。结果:赤芍、大黄药对中9个成分没食子酸、氧化芍药苷、芍药内酯苷、芍药苷、芦荟大黄素、大黄酸、大黄素、大黄酚、大黄素甲醚进样量分别在0.2296-2.296 μg(r_1=0.9996)、0.1352 ~1.352 μg(r_2 =0.9998)、0.1267 ~1.267 μg(r_3 =0.9996)、1.443 ~ 14.43 μg(r_4 =0.9997)、0.007856 ~ 0.07856 μg(r_5 = 0.9998)、0.02728 ~ 0.2728 μg(r_6 = 0.9999)、0.006613 ~ 0.06613 μg(r_7 =0.9998)、0.01057 ~ 0.1057 μg(r_8 =0.9994)、0.007721 ~ 0.07721 μg(r_9 = 0.9998)范围内与峰面积呈良好线性关系;平均回收率(n=5)分别为99.8%、99.0%、99.5%、99.4%、99.3%、99. 2%、99.3%、98.9%、99.1%。结论:该方法准确可靠、重复性好,可用于赤芍、大黄药对提取物的质量控制。
TLR2抗病毒固有免疫作用研究现状

Toll样受体2(Toll like receptor 2,TLR2)是Toll样受体家族中重要的成员,在多种细胞表达,可识别多种配体使炎症因子释放,参与固有免疫和适应性免疫应答过程,在机体抗病毒感染中发挥重要作用。本文就近五年TLR2及其信号途径参与病毒感染性疾病发展过程作一综述。
人类白细胞抗原与乙型肝炎病毒感染转归的研究进展

人感染HBV可表现为隐性、急性或急性重型HBV感染,之后有的清除病毒表现为自限性HBV感染,而约90% 的儿童和10%的成人则转为HBV携带者或慢性乙型肝炎,其中慢性乙型肝炎可进一步发展成肝硬化和肝细胞癌。目前认为,HBV感染转归主要取决于宿主的免疫反应。人类白细胞抗原(human leukocyte antigen, HLA)作为免疫系统的关键组成部分,在HBV感染免疫反应中扮演重要角色。HLA与HBV感染转归密切相关,但确切机制尚不清楚。目前研究认为,特异性HLA肽结合槽氨基酸序列和结构与疾病相关,HLA区域单核苷酸多态性(SNP)可能通过决定HLA表达水平,影响HBV感染的转归;而且,HLA通过激活特异性CD4~+ T淋巴细胞亚群并分泌细胞因子,影响炎性反应性疾病的易感性和保护性。现就HLA基因多态性与HBV感染清除或持续的相关性,以及可能的作用机制进行综述。
超剂量甲氨蝶呤治疗银屑病致骨髓抑制、皮肤坏死1例

人院体检:T 38.5℃,P 85次/分,R 19次/min,BP 152/80 mmHg(1 mmHg=0.133 kPa),一般情况可,神志清,神萎,痛苦面容,心肺腹无特殊。皮肤科检查:头皮可见粘着性白色鳞屑,四肢广泛的暗红斑,局部破溃、渗出、皲裂明显,Auspitz征(-),指、 趾甲畸形增厚。人院诊断:甲氨蝶呤中毒,寻常性银屑病。入院后予停用甲氨蝶呤,加强全身皮肤护理,抗感染药物应用,亚叶酸钙解毒,碱化尿液,促进药物代谢,同时加用还原性谷胱甘肽保肝、护肾治疗,予人粒细胞集落刺激因子及补充血小板治疗。 创面培养示:有菌生长,为铜绿假单胞菌及表皮葡萄球菌,根据药敏予头孢他啶抗感染,莫匹罗星局部应用。经积极治疗患者皮疹逐渐好转,目前随访中。
巨大疣状血管瘤

治疗上宜早期手术切除,但对于体积巨大的疣状血管瘤因常伴有皮下组织的血管增生和浅静脉的大范围畸形,一般很难完全切除病灶,术后易复发。可术前行血管造影及磁共振成像(MRI)检查了解皮下血管畸形情况,然后手术联合激光治疗。应用CO_2激光去除手术残留的皮疹或复发的疣状斑块,伤口愈合后再应用脉冲染料激光处理浅层的红色斑块。
口服霍乱疫苗快速免疫程序对感染性腹泻的保护效果评价

讨论:如何使部队官兵快速获得免疫保护是一个棘手的问题。在人群背景资料相同的情况下,接种方案和剂量改变是主要因素,本研究筛选出0天2粒、7天1粒的免疫程序,根据部队任务特点,选取7个月作为观察时限,选取感染性腹泻发生率作为观察指标,观察其对于感染性腹泻的保护效果,结果显示疫苗对感染性腹泻的保护率较高。与国际、国内标准免疫程序相比差异不大。
Photoluminescent, Theoretical and X-ray Investigations on an Iron-nicotinato Cluster

An unprecedented oxo-centered, trinuclear iron nicotinato cluster, [Fe_3O- (C_6NO_2H_5)_6(H_2O)_3][Fe(H_3O)_2Cl_6]?12H_2O?6Br (1), has been prepared via hydrothermal reac- tions and structurally characterized by X-ray diffraction. Compound 1 crystallizes in the R-3cspace group of rhombohedral system with α = 21.763(4), c = 24.361(3) A, V = 9992(3) A~3, C_(36)H_(66)Br_6Cl_6Fe_4N_6O_(30), M_r = 1978.51, D_c = 1.973 g/cm~3, S = 1.006, μ(MoKα) = 4.778 mm~(-1), F(000) = 5880, Z = 6, R = 0.0591 and wR = 0.1054. The title complex features an isolated structure, based on one discrete [Fe_3O(C_6NO_2H_5)_6(H_2O)_3]~(7+) cation, one [Fe(H_3O))_2Cl_6]– anion, twelve lattice water molecules and six isolated bromine anions. These isolated moieties are interconnected via hydrogen bonds to yield a three-dimensional (3-D) supramolecular network. Photoluminescent investigation reveals that the title complex exhibits an emission in the purple region. Theoretical study reveals that the emission is attributed to the metal to ligand charge-transfer (MLCT) interaction.
Synthesis, Crystal Structure, and Luminescent Property of One New Quinoxaline-substituted Nitronyl Nitroxide Complex [Ni(acac)_2(NITQ)_2]·2CH_2Cl_2

A new complex, [Ni(acac)_2(NITQ)_2]?2CH_2Cl_2 1 (acac = acetylacetone, NITQ = 2-(2'-quinoxalinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), was synthesized and charac- terized by elemental analysis, IR spectroscopy, UV-Vis absorption spectrum, and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P2_1/c with α = 9.6970(19), b = 20.410(4), c = 12.166(2) A, β = 93.89(3)°, M_r = 997.43, V = 2402.3(8) A~3, Z = 2, D_c = 1.379 g/cm~3, F(000) = 1040, m = 0.684 mm~(-1), the final R = 0.0423 and wR = 0.1197 for 2884 observed reflections (I > 2σ(I)). Compound 1 is found to assume a mononuclear structure, which is further linked into a three-dimensional (3D) supramolecular network by hydrogen-bonding, Cl···O weak contact and π???π stacking interactionsMoreover, the luminescent properties of the ligand and compound 1 were further investigated in detail.
优质食用红心甘薯品种浙薯70的选育及栽培技术

浙薯70是一个早熟、高产、橘红肉的甘薯品种,2011年通过国家食用甘薯品种鉴定。在2008 ~ 2009年国家区试中,2年鲜薯平均产量32 054. 85kg/hm~2,较对照南薯88增产1.30%,增产不显著;薯干平均9 814.65kg/hm~2,比对照增产11.67%,增产极显著,烘干率30.69%;淀粉率20.34%。中抗茎线虫病和黑斑病。浙薯70可作食用或薯片加工。