mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Essence of Pseudogap and Oscillation in High-Temperature Cuprate Superconductor Junction of Pseudogap State

This paper gives methods to calculate the pairing temperature T~*,at which a pseudogap is opened,and the superconducting temperature T_c,at which superconductivity appears,in the high-T_c cuprates,and demonstrates directly that at T_c ＜ T ＜ T~* the pseudogap is the gap of Cooper pair without long-range phase coherence,and at T ＜ T_c there is long-range phase coherence between Cooper pairs.Based on the above clear physical picture on the pseudogap state and our mechanism for the ac Josephson effect,this paper proposes that there should be a novel oscillatory current in P-I-P junction,induced by a constant bias on the junction.Here,P represents the high-T_c curates in the pseudogap state,where Cooper pairs do not have long-range phase coherence,and I represents the thin insulating barrier.This paper conjectures that there is a possible high-temperature superconductivity in the heavily underdoped high-T_c cuprates.
Stability of Nonlinear Wave of Kadomtsev-Petviashvili-Type Equation

For ion-acoustic waves in a plasma with non-isothermal electrons,the MKP equation is its governing equation.The instability of a soliton solution of MKP equation to two-dimensional long-wavelength perturbations is investigated up to the third order.It indicates that the one-soliton solution of MKP equation is unstable if v = -1 wheras it is stable if v = 1 until the third order approximation has been considered.
Modified Approach for Calculating Four-Quark Condensates

By differentiating the dressed quark propagator with respect to a variable background field,the linear response of the dressed quark propagator in the presence of the background field can be obtained.From this general method,using the vector background field as an illustration,we extract a general formula for the four-quark condensate〈(0)|:-q(0)γ_μq(0)-q(0)γ_μq(0):|0〉.This formula contains the corresponding fully dressed vector vertex. We use this formula to analyze the factorization problem of the four-quark condensate and show that in the bare vertex approximation factorization holds exactly.
Quantum Decoherence of Macroscopic Object Induced by Inner Environments: an Exactly Solvable Model

We revisit the quantum decoherence problem of the center of mass motion of a macroscopic object,which is modelled as a one-dimensional atom chain.Induced by the coupling of the center of mass (C.M) motion with the inner degrees of freedom,this inner-environment-induced decoherence is reflected by the localization of the C.M wave packet.We show that,the C.M motion is coupled to the inner states only when the chain has interaction with the external potential.This result provides a realistic mechanism for the analysis of the inner-environment-induced localization of a macroscopic object.
Routh Order Reduction Method of Relativistic Birkhoffian Systems

Routh order reduction method of the relativistic Birkhoffian equations is studied.For a relativistic Birkhoffian system,the cyclic integrals can be found by using the perfect differential method.Through these cyclic integrals,the order of the system can be reduced.If the relativistic Birkhoffian system has a cyclic integral,then the Birkhoffian equations can be reduced at least by two degrees and the Birkhoffian form can be kept.The relations among the relativistic Birkhoffian mechanics,the relativistic Hamiltonian mechanics,and the relativistic Lagrangian mechanics are discussed,and the Routh order reduction method of the relativistic Lagrangian system is obtained.And an example is given to illustrate the application of the result.
Synthesis and Crystal Structure of 7-Acetamido-5-chloro-8-(p-methyl- oxybenzenesulfonyloxy)-2-styrylquinoline

The title compound 7-acetamido-5-chloro-8-(p-methyloxybenzenesulfonyloxy)-2- styrylquinoline 4 (C_(26)H_(21)ClN_2O_5S, M_r = 508.96) has been synthesized and characterized by ~1H- NMR, IR, ESI-MS and single-crystal X-ray diffraction techniques. The crystal belongs to orthorhombic, space group Pca2_1, with a = 7.920(3), b = 10.672(5), c = 28.008(12)(A), V = 2367.3(17)(A)~3, Z = 4, D_c = 1.425 g/cm~3, μ = 0.290 mm~(-1), F(000) = 1056, R = 0.0323 and wR = 0.0692 for 3895 unique reflections with 3127 observed ones (I > 2σ(I)). X-ray analysis reveals that the styrylquinoline subunit adopts a coplanar conformation, where the benzene ring and quinoline are in trans configuration.
骨SPECT显像用于脊柱孤立性“热区”良恶性鉴别诊断

传统观念认为，放射性核素骨平面显像可在临床症状出现前2—6个月，甚至12个月以前发现肿瘤骨转移病灶。因此，其长期以来被广泛应用于判断转移性骨肿瘤的发生，从而指导患者治疗方案的选择或预后的判断。但在实际应用中，仍存在如下问题：（1）由于平面显像成像清晰度等方面的限制，对于人体解剖结构较为复杂的骨骼区域，其往往不能清晰显示解剖结构，致图像分析困难。这个问题在脊柱显像时尤为突出．因为从解剖学角度分析．脊柱由颈、胸、腰、
激光针炙推拿治疗老年人便秘64例

便秘原因颇多,可归纳为排便动力缺乏(即有关的肌肉无力,久病体弱,疾病影响,年老).肠道所受刺激不足(主要由于食物所含机械的或化学的刺激物不足)和神经功能失调等三类.便秘通常分为弛缓性与痉挛性两种.便秘是老年人的常见病和多发病.
类风湿关节炎的皮肤表现

类风湿关节炎可具有特异性和非特异性皮肤病变,包括类风湿结节,速发类风湿结节病、类风湿结节病、类风湿血管炎、Felty综合征、坏疽性脓皮病、关节炎间质的肉芽肿皮炎、栅栏状中性粒细胞肉芽肿皮炎、类风湿中性粒细胞皮炎.
红斑狼疮的皮肤组织病理学表现

红斑狼疮是一谱系疾病,临床上常见的有盘状红斑狼疮、亚急性皮肤型红斑狼疮和系统性红斑狼疮等.皮损组织病理学检查在该类疾病的诊断、分类及预后判定方面具有重要意义.该文对各种类型红斑狼疮皮损的组织病理学特征及狼疮带试验结果进行概述,并对几种少见的红斑狼疮亚型的组织病理学特征作一简要介绍.
有汗性外胚叶发育不良1例

患者男,25岁.因普秃25年,掌跖角化、甲板异常23年,于2006年4月3日来我院就诊.患者出生后头皮仅有少量毳毛，眉毛稀疏，且易脱落。5个月后毳毛全部脱落，以后一直未再生长，长期戴假发。
肉芽肿性肺疾病与肺部多发结节性病变

肺部多发结节性病变是指在肺部影像学和(或)病理组织学上以多个结节样病灶为主要表现的疾病群,可由许多病种引起.肉芽肿是病理组织学上慢性炎症的主要类型,是致炎因子长期持续性刺激所致的迟发型变态反应,在炎症局部形成以巨噬细胞增生为主、境界清楚的结节状病灶.
Influence of zirconium addition on the microstructure and magnetic properties of nanocomposite Nd_(10.1)Fe_(78.2-x)Co_5Zr_xB_(6.7) permanent magnets

Nanocomposite Nd_(10.1)Fe_(78.2-x)Co_5Zr_xB_(6.7) (x = 0, 1.5, 2.5, 2.7, 3, 4) permanent magnets were prepared by melt-spun and annealing. The microstructure and magnetic properties of the permanent magnets were investigated. The results reveal that the addition of Zr element significantly reduces the grain size and improves the thermal stability of the amorphous phase. A fine nanocomposite microstructure with an average grain size of about 35 nm can be developed at a wheel speed of 16 m·s~(-1) with the content of Zr up to 2.7 at.%. After optimal annealing (710℃ × 4 min), the magnetic properties of the Nd_(10.1)Fe_(75.5)Co_5Zr_(2.7)B_(6.7) bonded magnets were achieved as follows: B_r= 0.72 T, _jH_c= 769 kA·m~(-1), and (BH)_(max) = 85.0 kJ·m~(-3).
Effects of the two-step ageing treatment on the microstructure and properties of 7B04 alloy pre-stretched thick plates

The effects of the two-step ageing parameters (temperature and time) on the mechanical properties and electrical conductivity of 7B04 (Al-Zn-Mg-Cu) pre-stretched thick plates were studied. The results reveal that the initial T_1 ageing contributes a major increase of the tensile strength, and the 0.2% proof stress value reaches 482 MPa after ageing for 7 h at 115℃. Behavioral differences in the tensile properties of the alloy after the two-step ageing treatment were less with the first-step ageing at 115℃ for different time periods (7, 14, and 21 h). The effects of the second ageing parameters on the properties and microstructure of the 7B04 alloy were remarkable. TEM analysis of the samples aged at Temper I (7 h at 115℃ + 12 h at 160℃) and Temper Ⅱ (7 h at 115℃ + 16 h at 165℃) indicates that two kinds of phases, i.e. η' and η phases, precipitate from the matrix and efficiently improve the tensile strength of the alloy, and the grain boundary precipitates are coarse and discrete. There are obvious precipitate free zones (PFZs) along the grain boundary in the microstructure of the alloy after the two-step ageing treatment.
干扰素治疗不同炎症分级慢性乙型病毒性肝炎96例疗效分析

目的:观察干扰素治疗不同炎症分级慢性乙型病毒性肝炎的临床疗效及对乙肝病毒标志物的影响.方法:选择我院2001年6月-2005年3月住院行肝穿病理检查的慢性乙型病毒性肝炎患者96例,给予干扰素500万单位,隔日1次(12个月),观察患者的肝功能、乙肝病毒标志物的变化.结果:按炎症程度分级,G_1、G_2、G_3、G_4级患者在治疗过程中血清ALT复常率、HBsAg、HBeAg、HBVDNA阴转率4组比较差异有显著性(P＜0.05),炎症分级在G_3及G_3以上的病例,α-干扰素的治疗效应较好.结论:干扰素治疗慢性乙型病毒性肝炎疗效与肝脏炎症分级有关.
高血脂患者237例血清hS-CRP测定结果分析

1临床资料 2005-02/2006-08武警陕西总队医院收治的冠心病患者237(男135,女102)例,年龄45～75(平均60±5)岁.依据病情将患者分为4组.其中高胆固醇合并高甘油三脂组98例,高甘油三脂组74例,高胆固醇组65例.另选体检健康者81(男51,女30)例,年龄42～74(平均58±3)岁作为正常对照组.受试者均符合1979年国际心脏病学会及世界卫生组织(ISFC/WHO)的诊断标准,均排除其他器质性心脏病和细菌感染.
跟骨关节内骨折36例的手术治疗

0引言 跟骨骨折青壮年多见,约占全身骨折的2%[1],其骨折线累及距下关节面时称为跟骨关节内骨折.2001-10/2006-11,我院采用切开复位内固定治疗移位的跟骨关节内骨折,疗效满意.
黑质内注射脂多糖对多巴胺神经元的毒性作用

目的 观察黑质内注射脂多糖(LPS)对多巴胺神经元的毒性作用,探讨帕金森病(PD)的炎症机制.方法 立体定向黑质内注射15μg LPS,采用免疫组化方法观察注射后不同时间点大鼠黑质TH阳性细胞的减少以及小胶质细胞的形态学变化.结果 LPS注射后6 h、24h、14 d、30 dTH阳性细胞较对侧分别减少10%、43%、84%和85%.黑质小胶质细胞6 h出现部分激活,24 h和14 d几乎全部激活,30 d时又恢复静止状态.结论 黑质内注射LPS能诱导小胶质细胞激活和多巴胺神经元的进行性变性.
鼻咽纤维血管瘤43例临床分析

鼻咽纤维血管瘤是常见于男性青少年的良性肿瘤,其确切的治疗方法还是手术切除.术前作好充分准备并选择合适的手术径路是保证术野充分暴露和肿瘤完整切除、减少肿瘤术后复发的关键.现对1988～1999年我科收治的资料完整的43例患者的临床资料进行回顾性分析,以提高对本病的诊治水平.
鼻咽癌与IGF-2R及p27和p21表达的相关性研究

鼻咽癌是最常见的恶性肿瘤之一,因其病变部位特殊,与重要器官相邻,多为低分化鳞状细胞癌等原因导致手术不易彻底切除,术后易复发,且放疗的5年生存率仅45%左右.本研究以鼻咽低分化鳞状细胞癌为研究对象,鼻咽炎症组织作对照,观察候选抑癌基因(IGF-2R、p27)和原癌基因(p21)在鼻咽癌和鼻咽炎症中的表达,探讨三者与鼻咽癌的关系,为临床及研究提供参考.
第二届北京市职工数控技能大赛启动

2007年6月13日,第二届北京市职工数控技能大赛(以下简称"数控大赛")的启动新闻发布会在北京召开.同日,组委会第一次会议召开.北京市总工会副主席王北平、市科委副主任朱世龙出席新闻发布会.北京各大报纸、电台、电视台、新华社北京分社、门户网站和专业媒体等20余家媒体到会.
2型糖尿病合并亚临床甲状腺功能减退症的认知特点分析

目的:了解2型糖尿病合并亚IJ缶床甲状腺功能减退(亚临床甲减)的认知功能特点.方法:通过认知功能问卷,对18例2型糖尿病合并亚临床甲减和102例甲状腺功能正常的2型糖尿病的认知功能特点及相关因素进行分析.结果:2型糖尿病合并亚临床甲减在MMSE总分、执行功能、语言复述、身体部位线索回忆、指图正确数、图片误认数均较甲功正常的2型糖尿病者差,两者差异具有显著性(P＜0.05);促甲状腺激素(TSH)水平与性别呈正相关(r=0.310,P＜0.001).结论:2型糖尿病合并亚临床甲减在执行功能、语言能力方面损害加重,而且有图形觉及记忆能力的进一步减退;女性2型糖尿病患者更易患亚临床甲减;亚临床甲减作为一种可逆性痴呆的常见原因,应引起临床足够重视.
玉米新品种华玉6号的选育及其栽培技术

近年来,湖北省二高山地区主推品种鄂玉10号表现出对锈病的抗性较差、稳产性不足,为推动该地区玉米生产的进一步发展,选育综合性状优于鄂玉10号的玉米新品种,迫在眉捷.华玉6号就是在这样的条件下选育出的玉米新品种,具有丰产性好、抗病性及抗倒性强、籽粒大、品质优、综合农艺性状优良等特点.
耐寒抗病杂交水稻黔优18的选育及栽培制种技术要点

黔优18是贵州省水稻研究所用协青早A与自育的耐寒恢复系4761配组而成的高产组合,于2002年2月通过贵州省农作物品种审定委员会审定.该组合表现株叶型紧凑,叶片直立,分蘖力强,穗大粒多,结实率高、抗病性好,抗寒能力强,后期青秆黄熟,高产稳产.
小黑麦产量性状的遗传和相关分析

以6个小黑麦品种(系)为亲本材料,按Griffing Ⅱ方法配制杂交组合,对亲本、F1、F2的产量性状进行了遗传分析,结果表明:千粒重的遗传由加性效应和显性效应共同控制,株高由加性效应起主要作用,而单株产量、每穗粒数和穗下节间长除由加性效应和显性效应控制外,还可能受上位性效应和环境效应控制.除新小黑麦4号外,其它亲本的大部分性状的显性效应预测值达到了负的极显著水平,预示着这些亲本杂种后代的产量性状将有明显的自交衰退现象. 新小黑麦3号、新小黑麦4号的单株产量、千粒重、株高和穗下节间长的加性效应达到了极显著水平,因此这两个品种宜作为改良产量性状的骨干亲本.性状相关分析表明,大多数成对性状的各项相关系数为正值,且多以加性遗传相关为主,提高每穗粒数和千粒重可以有效增加产量.
An Optoelectronic High-voltage Probe for Measuring Impulse Voltage Distribution of HVDC Converter Valve

A high-voltage optoelectronic probe is developed for measuring impulse voltage distribution along thyristor units in the HVDC converter valve. The dimension of the resistive voltage divider is optimized by means of numerical computation of electric field. A pulse frequency modulation (PFM) mode is adopted for the data transmission link because of its immunity to high-intensity electromagnetic interference. Experimental results indicate that the linearity deviation for the whole measuring system is within ± 0.15 %, and therefore it can meet requirements specified by IEC60700-1.
Significant Positive Correlation of Plasma BPDE-Albumin Adducts to Urinary 1-Hydroxypyrene in Coke Oven Workers

Objective To investigate the application of BPDE-albumin adducts as monitoring biomarkers for coke oven workers exposed to polycyclic aromatic hydrocarbons(PAHs)and to explore possible relationship between BPDE-albumin adducts and urinary 1-hydroxypyrene (1-OHP)levels in them.Methods Thirty-seven coke oven workers from a coke plant and 47 controls without the occupational exposure to PAHs were recruited in this study.The levels of plasma BPDE-albumin adducts and urinary 1-OHP were analyzed using high performance liquid chromatography.Results The median levels of BPDE-albumin adducts(42.10 fmol/mg albumin)and urinary 1-OHP(5.46 μmol/mol creatinine)were significantly higher in coke oven workers than in controls(14.16 fmol/mg albumin,2.96 μmol/mol creatinine,respectively;P＜0.01).Multiple logistic regression analysis showed that coke oven workers were at higher risk of having BPDE-albumin adduct levels above 25.30 prnol/mg albumin(OR＝1.79,P＜0.01)and urinary 1-OHP levels above 4.13 μmol/mol creatinine(OR=2.45,P＜0.05).There was a positive correlation between the levels of BPDE-albumin adducts and urinary 1-OHP in all subjects(rs＝0.349,P＜0.01).Conclusion BPDE-albumin adduct is a useful biomarker for monitoring long-term exposure to PAHs,and plasma BPDE-albumin adducts level is significantly correlated to urinary 1-OHP levels in coke oven workers.
Joint performance of CO_2 laser beam welding 5083-H321 aluminum alloy

Laser beam welding of aluminum alloys is expected to offer good mechanical properties of welded joints. In this experimental work reported, CO_2 laser beam autogenous welding and wire feed welding are conducted on 4mm thick 5083-H321 aluminum alloy sheets at different welding variables. The mechanical properties and microstructure characteristics of the welds are evaluated through tensile tests, micro-hardness tests, optical microscopy and scanning electron microscopy (SEM). Experimental results indicate that both the tensile strength and hardness of laser beam welds are affected by the constitution of filler material, except the yield strength. The soften region of laser beam welds is not in the heat-affected zone (HAZ). The tensile fracture of laser beam welded specimens takes place in the weld zone and close to the weld boundary because of different filler materials. Some pores are found on the fracture face, including hydrogen porosities and blow holes, but these pores have no influence on the tensile strength of laser beam welds. Tensile strength values of laser beam welds with filler wire are up to 345.57MPa, 93% of base material values, and yield strengths of laser beam welds are equivalent to those of base metal (264.50MPa).
胸背动脉-腹壁下动脉-旋股外侧动脉升支联合供应超长皮瓣移植一例报告

患者男，18岁，梳棉机致右上肢外伤5h入院。查体：右上肢从肩峰至手背桡侧纵长皮肤及软组织缺损，桡神经及肱三头肌桡侧半从肱骨中段至肘关节平面缺损，肱骨远段外侧皮质及处髁部分磨损，桡骨小头半脱位，桡动静脉、头静脉及桡侧腕长、短伸肌和肱桡肌从肘下3cm至腕关节平面全长缺损.
Delay-dependent Robust Stabilization for Uncertain Singular Systems with State Delay

This paper considers the problem of delay-dependent robust stabilization for uncertain singular delay systems. In terms of linear matrix inequality (LMI) approach, a delay-dependent stability criterion is given to ensure that the nominal system is regular, impulse free, and stable. Based on the criterion, the problem is solved via state feedback controller, which guarantees that the resultant closed-loop system is regular, impulse free, and stable for all admissible uncertainties. An explicit expression for the desired controller is also given. Some numerical examples are provided to illustrate the validity of the proposed methods.
Ⅲ型胆管囊肿1例报告

Ⅲ型胆管囊肿在临床上少见,我科于2007年1月收治1例.报告如下.1 病历简介病人女,60岁.因中上腹疼痛24h,伴恶心呕吐就诊.无黄疸、发热史.查体：皮肤、巩膜无黄染，腹平软，中上腹有压痛，无反跳痛，无肌卫。
护理岗位评价研究进展

岗位评价,也称工作评价、岗位价值评估或职位评价(job evaluation),是根据职位分析的结果,按照一定的标准,对工作的性质、强度、责任、复杂性及所需的任职资格等因素的差异程度进行综合评估的活动[1].
病人分类系统应用于护理人力配置的研究进展

随着卫生系统改革,人们健康需求增加及医学快速发展,护理人员的配置越来越受到护理界重视,科学地进行护理人力配置是护理管理中重要的一环,是决定护理工作质量的重要因素.护理人员合理配置对提高整个卫生人力系统的利用效率起着重要作用.
一种特制复合绝缘子在防止线路冰闪中的应用

为了降低阳泉地区大面积输电线路冰闪故障的发生,分析了近年来阳泉电网220kV输电线路冰闪故障,找出了引起复合绝缘子冰闪的典型气象特征及闪络机理.针对复合绝缘子结构上存在的问题,提出了采用一种特制复合绝缘子来防止冰闪故障的发生,并介绍了该绝缘子的性能、特性及在电网中的应用情况.
发电机定子接地保护动作的原因分析及处理

为了保障发电机的安全运行,针对云浮发电厂3、4号发电机两起定子接地保护动作跳机故障实例,结合发电机室外敞开式母线的结构特点和在雨天出现的异常现象,分析了发变组故障录波报告和敞开式母线的遮雨棚在雨天漏水的情况,查找出定子接地保护动作跳机故障的原因即遮雨棚在雨天漏水引起瓷瓶绝缘下降,导致机端三相对地电压不平衡,出现定子接地保护动作跳机故障.经过对遮雨棚改造,解决了3、4号发电机在雨天出现定子接地保护动作跳机的问题.
我国科学家在地球大气涡旋自组织的研究领域取得重要进展

地球大气中存在大小不等的涡旋,大涡如台风,其半径一般为几百公里,小涡如强对流云团,半径约为几十公里或更小.这些大小不等涡旋之间的相互作用往往不仅导致台风运动的反常以及台风和中、小尺度高影响灾害性天气预报的失败,而且历来是台风和中、小尺度强灾害性天气预测理论的一个关键问题,也是世界各国科学家共同面对的科学前沿和难点问题.
Electrochemical performance of multiphase nickel hydroxide

The high density nano-crystalline multiphase nickel hydroxide containing at least three doping elements was synthesized and its electrochemical characteristics were studied. The electrochemical behavior of the high density spherical multiphases α-Ni(OH)_2 were also investigated. The results show that the structure of the material is a mixed phase of α-Ni(OH)_2 and β-Ni(OH)_2, which has a the same stabilized structure as α-Ni(OH)_2 during long-term charge/discharge process. High density spherical multiphases α-Ni(OH)_2 have a much better redox reversibility, a much lower oxidation potential of Ni(Ⅱ) than the corresponding oxidation state in the case of β-Ni(OH)_2, and a much higher reduction potential. They exchange one electron during electrochemical reaction and have a higher proton diffusion coefficient. The mechanism of the electrode reaction is proton diffusion, and the proton diffusion coefficient is 5.67×10~(-10)cm~2/s. Moreover, they reveal a higher discharge capacity than β-Ni(OH)_2/β-NiOOH because they exchange one electron per nickel atom during charge/discharge process.
Structure and electrochemical properties of LiMn_2O_4

LiMn_2O_4, a cathode material of lithium ion battery, was prepared by the citric acid complexing method using lithium acetate and manganese acetate as raw materials. The type of atom location confused degree, the confused degree and judgement method in LiMn_2O_4 were analyzed. The effect of sintering temperature on structure and electrochemical properties of LiMn_2O_4 was also investigated. The results show that the atom location confused degree increases with the decrease of the X-ray diffraction peak intensity ratio of LiMn_2O_4, I_(111)/I_(311). The type of atom location confused degree depends on the variation tendency of I_(111)/I_(311) and I_(311)/I_(400) value. If the variation tendency is the same, it belongs to the 16c type location confusion, however, if the variation tendency is contrary, it belongs to the anti-spinel type location confusion. When the sintering temperature is low, it is apt to produce the anti-spinel location confusion in LiMn_2O_4. With the increase of sintering temperature, the confused degree with the anti-spinel type gradually reduces, however, the confused degree with 16c type increases to some extent. When the atom location confusion with the anti-spinel type appears in LiMn_2O_4, both the initial discharging capacity and cycling properties of LiMn_2O_4 reduce. However, the atom location confusion with 16c type does not affect the charge and discharge properties of LiMn_2O_4.
Effect of transformation pH on performance of nano-scale β-Ni(OH)_2

The influence of transformation pH value on the performance of nano-scale Ni(OH)_2 was analyzed. The measurement results of XRD and TEM indicate that the samples are composed of β-Ni(OH)_2 with crystal size of 20-50 nm, and the crystal lattice parameters of nano-scale Ni(OH)_2 prepared at different transformation pH values are different. With the increase of transformation pH value, the agglomeration of nano-scale Ni(OH)_2 becomes obvious. Cyclic voltammograms(CV) and electrochemical impedance spectroscopy(EIS) measurement results show that transformation pH value affects the proton diffusion coefficient(D) and charge-transfer resistance(R_(ct)) of the material. The specific capacity is up to 327.8 mA-h/g, and the discharge performance of electrodes depends on both D and R_(ct), so the kinetic characteristics that electrodes reaction is controlled by both mass-transfer step and charge-transfer step was put forward.
Electricity Generation from a Microbial Fuel Cell Employing Desulfovibrio Salexigens

A microbial fuel cell of laboratory scale employing Desulfovibrio salexigens in lactate based seawater substrate was proposed. Electricity was continuously harvested after inoculation. During 20 days of fermentation/discharge, COD values of the substrate decreased by 61.7%, in which 9.81% was converted to electricity.
HPLC法测定扭肚藤药材中东莨菪素的含量

目的:建立扭肚藤药材中东莨菪素的含量测定方法.方法:采用HPLC法.色谱柱为Merck Lichrospher 100RP-18e(250×4.0 mm,5 μm),流动相为乙腈-磷酸水溶液(14.5∶85.5,v/v,用磷酸调节水溶液pH为3.0),检测波长为346 nm.结果:平均回收率98.38%,RSD为2.21%.结论:方法简便,结果准确,重现性好,可用于扭肚藤药材的质量控制.
灵芝孢子粉的质量研究

目的:建立灵芝孢子粉的质量标准.方法:采用显微观察法、含油率测定法、TLC法、酚-硫酸法测定多糖含量,HPLC法测定腺苷含量及薄层-分光光度法测定总三萜含量,对灵芝孢子粉的质量进行了较全面的研究.结果:采用上述方法,可以有效控制灵芝孢子粉的内在质量.结论:可以通过测定灵芝孢子粉的破壁率、含油率,TLC特征斑点及多糖含量、腺苷含量、总三萜含量等指标,有效控制灵芝孢子粉的质量.
硅油取出术后视网膜再脱离临床分析

对象 2004-01/2005-12行硅油取出术后207眼随访中发现37眼(37例)视网膜再脱离(17.87%),其中男25例,女12例,年龄7～64(平均41.3)岁. 207眼硅油取出术患眼首次术前情况,孔源性视网膜脱离伴PVRC级70例,孔源性视网膜脱离伴PVRD级58例,复发性视网膜脱离伴PVR 19例,巨大裂孔源性视网膜脱离8例,先天性虹膜脉络膜缺损合并视网膜脱离5例,视网膜静脉周围炎继发视网膜脱离3例,严重眼外伤引起的视网膜脱离21例,糖尿病性视网膜病变IV～VI期17例,化脓性眼内炎6例.
要注意儿童慢性咳嗽的诊断与鉴别诊断

临床上通常将咳嗽时间持续,以咳嗽为主要表现,胸部X线检查无明显病变者,称为慢性咳嗽.慢性咳嗽持续时间,儿科尚未有界定.
Experimental investigation of the effect of sediment transport patterns on the adsorption of cadmium ions onto sediment particles

The mechanism of flow turbulence, sediment supply conditions, and sediment transport patterns that affect the adsorption of cadmium ions onto sediment particles in natural waters are experimentally simulated and studied both in batch reactors and in a turbulence simulation tank. By changing the agitation conditions, the sediment transport in batch reactors can be categorized into bottom sediment-dominated sediment and suspended sediment-dominated sediment. It is found that the adsorption rate of bottom sediment is much less than that of suspended sediment, but the sediment transport pattern does not affect the final (equilibrium) concentration of dissolved cadmium. This result indicates that the parameters of an adsorption isotherm are the same regardless of the sediment transport pattern. In the turbulence simulation tank, the turbulence is generated by harmonic grid-stirred motions, and the turbulence intensity is quantified in terms of eddy diffusivity, which is equal to 9.84F (F is the harmonic vibration frequency) and is comparable to natural surface water conditions. When the turbulence intensity of flow is low and sediment particles stay as bottom sediment, the adsorption rate is significantly low, and the adsorption quantity compared with that of suspended sediment is negligible in the 6 h duration of the experiment. This result greatly favors the simplification of the numerical modeling of heavy metal pollutant transformation in natural rivers. When the turbulence intensity is high but bottom sediment persists, the rate and extent of descent of the dissolved cadmium concentration in the tank noticeably increase, and the time that is required to reach adsorption equilibrium also increases considerably due to the continuous exchange that occurs between the suspended sediment and the bottom sediment. A comparison of the results of the experiments in the batch reactor and those in the turbulence simulation tank reveals that the adsorption ability of the sediment, and in particular the adsorption rate, is greatly over-estimated in the batch reactor.
Arsenic uptake and transport of Pteris vittata L. as influenced by phosphate and inorganic arsenic species under sand culture

In order to understand the similarity or difference of inorganic As species uptake and transport related to phosphorus in As-hyperaccumulator, uptake and transport of arsenate(As(V))and arsenite(As(III))were studied using Pteris vittata L. under sand culture. Higher concentrations of phosphate were found to inhibit accumulation of arsenate and arsenite in the fronds of P. vittata. The reduction in As accumulation was greater in old fronds than in young fronds, and relatively weak in root and rhizome. Moderate increases, from 0.05 to 0.3 mmol/L, in phosphate reduced uptake of As(III)more than As(V),while the reverse was observed at high concentrations of phosphate(1.0 mmol/L).Phosphate apparently reduced As transport and the proportion of As accumulated in fronds of P. vittata when As was supplied as As(V).It may in part be due to competition between phosphorus and As(V)during transport. In contrast, phosphate had a much smaller effect on As transport when the As was supplied as As(III).Therefore, the results from present experiments indicates that a higher concentration of phosphate suppressed As accumulation and transport in P.vittata, especially in the fronds, when exposed to As(V);but the suppression of phosphate to As transport may be insignificant when P. vittata exposed to As(III)under sand culture conditions. The finding will help to understand the interaction of P and As during their uptake process in P. vittata.