mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
The effect of quantum noise on  multiplayer quantum game

It has recently been realized that quantum strategies have a great advantage over classical ones in quantum games. However, quantum states are easily affected by the quantum noise, resulting in decoherence. In this paper, we investigate the effect of quantum noise on a multiplayer quantum game with a certain strategic space, with all players affected by the same quantum noise at the same time. Our results show that in a maximally entangled state, a special Nash equilibrium appears in the range of 0≤p≤0.622 （p is the quantum noise parameter）, and then disappears in the range of 0.622 〈 p≤ 1. Increasing the amount of quantum noise leads to the reduction of the quantum player＇s payoff.
Improvement of chronic heart failure by dexamethasone is not associated with downregulation of leptin in rats

Aim： To demonstrate the hypothesis that dexamethasone （Dex） could improve chronic heart failure （CHF） by inhibiting the downstream signaling transduction of leptin but had no influence on the upregulation of leptin and its receptor in myocardium. Methods： CHF was induced by left coronary artery ligation for 6 weeks. CHF rats were treated with Dex 50 mg·kg~(-1)·d~(-1). Hemodynamics, histology, reactive oxygen species （ROS）-related parameters, and leptin concentrations in serum were measured. The mRNA expression of matrix metalloproteinases （MMP） 2/9, tissue inhibitor of metalloproteinases （TIMP） 1/2, tumor necrosis factor （TNF）-α, and OB-Rb were measured by RT-PCR. Results： In the CHF rats, hemodynamic functions were deteriorated, which was accompanied with myocardium remodeling and histological changes. CHF rats showed hyperleptinemia and excessive ROS in the serum, and the upregulation of MMP-2/9, TNF-α, and leptin receptor mRNA and downregulation of TIMP-1/2 mRNA in the myocardium compared with the sham operation group. Dex treatment significantly ameliorated CHF in association with the reversion of the abnormalities of MMP-2/9, TIMP- 1/2, TNF-α, and ROS. But Dex had no influence on the hypedeptinemia and the upregulated leptin and its receptor in the myocardium during CHF. Conclusion： Dex improves CHF by inhibiting TNF-α, MMP-2, MMP-9, and ROS. Dex had no effects on upregulated leptin and its receptor expression and hyperleptinemia induced by CHF.
PHOTO-INDUCED GRAFT POLYMERIZATION OF ACRYLAMIDE ON POLYPROPYLENE MEMBRANE SURFACE IN THE PRESENCE OF DIBENZYL TRITHIOCARBONATE

Ultraviolet （UV）-induced graft polymerization of acrylamide （AAm） on polypropylene substrates was successfully conducted using dibenzyl trithiocarbonate （DBTTC） as photoinitiator. It was confirmed by chemical analysis and surface morphology observation with attenuated total reflectance Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. A possible mechanism for this graft process was presented, which suggested that, under UV irradiation, the C： S bond in DBTTC could split and abstract a hydrogen from the polypropylene surface and a surface free radical was then formed, and initiated the graft polymerization of AAm.
Spontaneous Electro-Weak Symmetry Breaking and Cold Dark Matter

In the standard model, the weak gauge bosons and fermions obtain mass after spontaneous electro-weak symmetry breaking, which is realized by one fundamental scalar field, namely the Higgs field. We study the simplest scalar cold dark matter model in which the scalar cold dark matter also obtains mass by interaction with the weak-doublet Higgs field, in the same way as those of weak gauge bosons and fermions. Our study shows that the correct cold dark matter relic abundance within 3σ uncertainty (0.093 <Ω_(dm) h~2 < 0.129) and experimentally allowed Higgs boson mass (114.4≤ m_h ≤ 208GeV) constrain the scalar dark matter mass within 48≤e m_S ≤78GeV. This result is in excellent agreement with the result of de Boer et al. (50～100GeV). Such a kind of dark matter annihilation can account for the observed gamma rays excess (10σ) at EGRET for nergies above 1GeV in comparison with the expectations from conventional Galactic models. We also investigate other phenomenological consequences of this model. For example, the Higgs boson decays dominantly into scalar cold dark matter if its mass lies within 48～64GeV.
On the Energy-Momentum Problem in Static Einstein Universe

The energy-momentum distributions of Einstein's simplest static geometrical model for an isotropic and homogeneous universe are evaluated. For this purpose, Einstein, Bergmann--Thomson, Landau--Lifshitz (LL), Moller and Papapetrou energy-momentum complexes are used in general relativity. While Einstein and Bergmann--Thomson complexes give exactly the same results, LL and Papapetrou energy-momentum complexes do not provide the same energy densities. The Moller energy-momentum density is found to be zero everywhere in Einstein's universe. Also, several spacetimes are the limiting cases considered here.
X-Ray Magnetic Circular Dichroism Measurement of Fe-Co Alloy Films Prepared by Electrodeposition

The macro- and micro-magnetic properties of Fe--Co alloy films eletrodeposited on GaAs(100) are studied by synchrotron radiation x-ray magnetic circular dichroism (XMCD) in combination with the magneto-optical Kerr effect (MOKE) measurements and magnetic force microscopy (MFM). The orbital and spin magnetic moments of each element in the Fe--Co alloy are determined by the sum rules of XMCD. Element-specific hysteresis loops (ESHL) are obtained by recording the L_3 MCD signals as a function of applied magnetic field. MOKE results reveal that the amorphous films are magnetically isotropic in the surface plane. The MFM image shows that the dimension of the magnetic domains is about 1--2μm, which is much larger than that of the grains, indicating that there are intergranular correlations among these grains. Both ESHL and MOKE hysteresis loops indicate the strong ferromagnetic coupling of Fe and Co in the alloy films.
Localization of a Three-Level Cascade Atom via Resonant Absorption

We show that it is possible to localize a three-level cascade atom under the resonance condition when it passes through a standing-wave field. The localization peaks appear at the nodes of the standing-wave field, the detecting probability is 50% in the subwavelength domain, and the peaks are narrower on the resonance than the off-resonance. The absorption is the same as that in the usual two-level medium at the nodes and is greatly suppressed outside the nodes due to the Autler--Townes splitting. This is in sharp contrast to the lambda scheme, in which the localization is impossible under the same resonance condition due to the depletion of population of the initial state by the probe field at the nodes and the electromagnetically induced transparency outside the nodes.
△-Resonance Effective Mass in Medium

Based on the relativistic chiral effective field theory, we study the effective mass of the △-resonance in medium by investigating the self-energy of the △-resonance related to the πN decay channel in symmetric nuclear matter. We find that the effective mass of △-resonance decreases evidently with increasing nuclear density ρ. In our calculation, we also consider the influence of the shifts of the nucleon mass, pion mass and its decay constant due to the restoration of chiral symmetry in medium. The results are roughly consistent with the data given by Lawrence Berkeley National Laboratory.
Urban niche dynamics of Kaifeng city

Niche theory is one of the most important ecological theories. It is widely applied to analyzing such phenomena as competition among, and evolution of, urban ecosystem func- tional modules. This paper describes a study concerning different functional modules of Kaifeng city urban ecosystem. Niche theory and techniques were used to analyze the changes of these functional modules in the period 1994–2003. The results showed that, in the period 1994–2003: (1) Niche value of the atmospheric environment and urban virescence modules increased, while niche value of the water environment and sound environment modules decreased; (2) niche value of the tertiary industry module increased, niche value of the secondary industry module decreased, while niche value of the primary industry module showed little change; and (3) niche value of the infrastructure, resource distribution, and production & social security modules increased, while niche value of the population module decreased. This study may contribute to macroscopic planning of urban functional modules, economic development, and environmental protection.
Impacts of the large amount of sand mining on riverbed morphology and tidal dynamics in lower reaches and delta of the Dongjiang River

The sand dredging and its impacts on riverbed evolution and tidal dynamic change in the lower reaches and delta of the Dongjiang River are examined in this paper. The large amount of sand, totally 3.32 billion m3 from 1980 to 2002, was mined from the riverbeds of the lower reaches and delta of the Dongjiang River. Increasing of the channel capacity, lowering of the average riverbed elevation, deepening of the water depth and decreasing of the longi- tudinal riverbed gradient are the main effects on the riverbed evolution brought by the large amount of sand dredging. Under the strong sand dredging and associated significant riverbed deformation, the notable changes of the tidal dynamic in the lower reaches and delta of the Dongjiang River occurred, including: (1) in the upper reaches of the Dongjiang River delta and lower reaches of the Dongjiang River, tidal level dropped apparently, tidal range widened, flood tidal duration became longer, amplitudes for major tidal components became bigger and tidal dynamics intensified; (2) tidal wave spread faster; and (3) the limits of the tidal level, tidal current and salt water moved upstream.
nSrDNA Appraisal of High Yield Flocculant Compound Bacteria and Their Application Effect

High effect flocculant compound bacteria were screened out with the product bacteria of flocculant in soil. Their system appraising study shows that two were actionomyces and the other was microzyme among the three bacteria. According to nSrDNA, the three bacteria were marked at a molecule level and the system growth tree was established, ensuring the position of compound bacteria at the molecule level. The purificant which was made of the compound bacteria has spreading value because of its excellent clearing effect for organic and inorganic polluted water.
A partial least-squares regression approach to land use studies in the Suzhou-Wuxi-Changzhou region

In several LUCC studies, statistical methods are being used to analyze land use data. A problem using conventional statistical methods in land use analysis is that these methods assume the data to be statistically independent. But in fact, they have the tendency to be dependent, a phenomenon known as multicollinearity, especially in the cases of few observations. In this paper, a Partial Least-Squares (PLS) regression approach is developed to study relationships between land use and its influencing factors through a case study of the Suzhou-Wuxi-Changzhou region in China. Multicollinearity exists in the dataset and the number of variables is high compared to the number of observations. Four PLS factors are selected through a preliminary analysis. The correlation analyses between land use and in- fluencing factors demonstrate the land use character of rural industrialization and urbaniza- tion in the Suzhou-Wuxi-Changzhou region, meanwhile illustrate that the first PLS factor has enough ability to best describe land use patterns quantitatively, and most of the statistical relations derived from it accord with the fact. By the decreasing capacity of the PLS factors, the reliability of model outcome decreases correspondingly.
Determination of Ultratrace Amounts of Copper(Ⅱ) in Water Samples by Electrothermal Atomic Absorption Spectrometry After Cloud Point Extraction

A novel approach was developed for the determination of ultratrace amounts of copper in water samples by using electrothermal atomic absorption spectrometry(ETAAS) after cloud point extraction(CPE). 1-(2-Pyridylazo)-2-naphthol was used as the chelating reagent and Triton X-114 as the micellar-forming surfactant. CPE was conducted in a pH 8.0 medium at 40 ℃ for 10 min. After the separation of the phases by centrifugation, the surfactant-rich phase was diluted with 1 mL of a methanol solution of 0.1 mol/L HNO_3. Then 20 μL of the diluted surfactant-rich phase was injected into the graphite furnace for atomization in the absence of any matrix modifier. Various experimental conditions that affect the extraction and atomization processes were optimized. A detection limit of 5 ng/L was obtained after preconcentration. The linear dynamic range of the copper mass concentration was found to be 0\_2.0 ng/mL, and the relative standard deviation was found to be less than 3.1% for a sample containing 1.0 ng/mL Cu(Ⅱ). This developed method was successfully applied to the determination of ultratrace amounts of Cu in drinking water, tap water, and seawater samples.
Effects of Shock Pressure on Transition Pressure in Zr

Measurements of free surface velocity profiles of high-purity Zr samples under shock-wave loading are performed to study the dynamic strength and phase transition parameters. The peak pressure of the compression waves is within the range from 9 to 14GPa, and the Hugoniot elastic limit is 0.5GPa. An anomalous structure of shock waves is observed due to the αl-ω phase transition in Zr. Shock pressure has effects on transition pressure which increases with increasing compression strength, and the stronger shocks have a lower transit time.
Beginning to understand microRNA function

MicroRNa (miRNAs) are ～22 nt small RNAs expressed by plants, animals, viruses and at least one unicellular organism, the green alga, Chlamydomonas reinhardtii [1]. Most miRNAs are transcribed as primary mi RNAs (pri-miRNAs) by RNA polymerase III. In animals, pri-miR-NAs are converted to mature miRNAs by two successive endonucleolytic cleavages [2].
Josephson Effect of Dilute Bose--Einstein Condensates in Laser-Modulated Double Wells

The Josephson effect of Bose condensates with a weak link created by superposing a far-off-resonant red-detuned laser beam on a double-well potential is theoretically considered. The numerical simulations show that there would be clear Josephson effect for this sort of three-well system. The present work gives a feasible scheme to study a new type of weak link which is crucial to investigate experimentally the Josephson effect.
Initial Value Techniques for the Helmholtz and Maxwell Equations

We study the initial value problem of the Helmholtz equation with spatially variable wave number. We show that it can be stabilized by suppressing the evanescent waves. The stabilized Helmholtz equation can be solved numerically by a marching scheme combined with FFT. The resulting algorithm has complexity n~2 log n on a n × n grid. We demonstrate the efficacy of the method by numerical examples with caustics. For the Maxwell equation the same treatment is possible after reducing it to a second order system. We show how the method can be used for inverse problems arising in acoustic tomography and microwave imaging.
Tokamak resistive magnetohydrodynamic ballooning instability in the negative shear regime

Improved confinement of tokamak plasma with central negative shear is checked against the resistive ballooning mode. In the negative shear regime, the plasma is always unstable for purely growing resistive ballooning mode. For a simplest tokamak equilibrium model, the s–α model, characteristics of this kind of instability are fully clarified by numerically solving the high n resistive magnetohydrodynamic ballooning eigen-equation. Dependences of the growth rate on the resistivity, the absolute shear value, the pressure gradient are scanned in detail. It is found that the growth rate is a monotonically increasing function of α while it is not sensitive to the changes of the shear s, the initial phase θ0 and the resistivity parameter εR.
Generalized Projective Synchronization Between Rossler System and New Unified Chaotic System

Based on symbolic computation system Maple and Lyapunov stability theory, an active control method is used to projectively synchronize two different chaotic systems - Lorenz-Chen-Lü system (LCL) and R(o)ssler system,which belong to different dynamic systems. In this paper, we achieve generalized projective synchronization between the two different chaotic systems by directing the scaling factor onto the desired value arbitrarily. To illustrate our result,numerical simulations are used to perform the process of the synchronization and successfully put the orbits of drive system (LCL) and orbits of the response system (R(o)ssler system) in the same plot for understanding intuitively.
儿童眩晕诊断的策略与技巧

临床上常见到儿童眩晕患者,但却因患儿不能准确描述眩晕的感觉及前庭功能检查配合不好等因素,影响儿童眩晕的正确诊断与鉴别诊断,给临床治疗带来困难.因此在接诊患儿时,医生除了要了解儿童的生理发育与儿童眩晕的特点外,还要掌握采集儿童眩晕病史的技巧,注意观察患儿的阳性体征,更要积极与儿科、小儿神经科合作,共同查找原因,减少儿童眩晕的误诊、漏诊.
贵州省大白菜制种生产的主要制约因素及发展对策

大白菜制种生产是贵州省实现农业产业结构调整,增加农民收入的一项新兴产业.由于贵州省大白菜育种研究起步较晚,杂交种的制种生产起步更晚,制种面积近年来才由最初的0.5 hm~2发展到5～8 hm~2,单产从300～400 kg/hm~2提高到525～675 kg/hm~2.
糖能两用型甘蔗新品种粤糖96-835的选育

粤糖96-835系广州甘蔗糖业研究所从Co419×新台糖10号杂交组合后代中选育成的糖能两用型甘蔗新品种.该品种中早熟,高糖高产,萌芽快、齐,分蘖性好,宿根性较强;中至中大茎,实心,不易倒伏,老叶较容易脱壳;6年38点次试验,结果表明,粤糖96-835平均蔗茎产量105 531 kg/hm~2、含糖量15 333 kg/hm~2、平均蔗糖分14.55%,分别较对照ROC 10增产蔗25.2%、增产糖26.3%,蔗糖分高0.07%;人工接种,高抗黑穗病和嵌纹病;适宜粤西、粤北及广西、福建等中等或中等以上的旱坡地或水旱田种植.
10种贵州狭限分布植物的种苗扩繁与栽培试验研究

报道了贵州10种狭限分布植物种苗繁育与扩大栽培的研究结果:小黄花茶(Camellia luteoflora),美丽红山茶(C.delicata)、冬青叶山荼(C.ilicifolia)、狭叶瘤果茶(C.neriifolia)、长柱红山茶(C.longistyla)和贵州石笔木(Tutcheria kwerchowensis)的播种出苗率分别为30.5%、70.0%、50.0%、53.0%、70.0%和49.0%,其成苗数与出苗数的比值分别是51.7%、89.7%、89.7%、83.8%、87.5%、和71.0%;黄平槭(Acer huangpingense)、贵州槭(A.guizhouensis)、雷公山槭(A.legongshanensis)和红脉槭(A.rubronervium)的出苗率分别达60.3%、65.2%、72.0%和61.0%,其成苗数与出苗数的比值分别为99.0%、95.0%、99.2%和50.1%.采用种子田间播种育苗、枝条扦插繁殖的方式进行种苗扩繁试验研究,按植物系统发育类群分为1.械树属4种、2.山茶属5种、3.石笔木属1种等3个组别,分别测定,扩繁系数为0.93～1、0.93～1和1,苗木产出周期2～3年,并通过试验研究提出了应用栽培技术的优化配套方案.
直流电药物离子导入联合中药治疗玻璃体混浊80例

玻璃体混浊又称飞蚊症,是临床上一种比较常见也比较难治的眼病,也是直接影响视力的原因之一.由于玻璃体本身没有血管,又无神经组织,新陈代谢极为缓慢,故当玻璃体出现混浊时,治疗往往疗效不佳.我们采用直流电药物离子导入联合中药治疗各种原因引起的玻璃体混浊取得了满意疗效,现将观察结果报告如下.
脑源性神经营养因子信号转导在神经病理性疼痛中的作用

神经病理性疼痛是一种常见并且严重影响人类健康的疾病,甚至可导致病人最终失去行动能力,全世界受此病困扰着达数百万人,因此成为神经科学研究的一个重要问题,但具体机制还不清楚.。目前已经知道,神经病理性疼痛是由于手术等造成的神经损伤或糖尿病、带状疱疹、艾滋病,以及部分肿瘤等疾病产生的外周神经功能异常所引起,患者出现痛觉敏感的现象,对轻微的皮肤触摸产生较痛苦的感觉。目前对神经病理性疼痛的预防和治疗措施有限,因此加强在该领域的研究具有十分重要的意义。经过许多科学家的努力,最近的一系列研究表明一种神经营养因子--脑源性神经营养因子( brain-derived neurotrophic factor,BDNF)在神经性疼痛发生过程中发挥着关键性的作用.
Synthesis and Crystal Structure of a 1D Manganese Coordination Polymer Constructed by 3,5-dimethylbenzoic Acid with 1,10-phenanthroline

A manganese coordination polymer [Mn(3,5-Me_2PhCO_2)_2(phen)]_n2 (phen)]n (phen =1,10-phenanthroline) has been synthesized by hydrothermal methods. The crystal structure was determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P(1) with a=0.770 3 (4) nm, b =1.145 2(6) nm, c =1.537 0(9) nm, α=78.182(9)°,β=0.043 4, R=0.060 8 ,wR=0.148 4. In the crystal the manganese atom is six-coordinated by two nitrogen atoms from phen and four oxygen atoms from four 3,5-dimethylbenzolate molecules, completing an octahedral geometry. And the title complex forms one-dimensional chain structure through bridging 3,5-dimethylbenzolate molecules. CCDC: 642920.
腹腔镜术结合中医治疗多囊卵巢综合征

目的:腹腔镜术结合中医治疗多囊卵巢综合征的临床效果.方法:50例中医辨证为痰湿阻滞型多囊卵巢综合征不育患者,随机分成二组:手术+中医治疗组(研究组)30例,采用化痰补肾法结合腹腔镜下卵巢契形切除术治疗;对照组20例采用单纯腹腔镜下卵巢契形切除术治疗,观察比较二组的临床治疗效果.结果:研究组总有效率为96.7%,妊娠率达90.0%;对照组总有效率75.0%,妊娠率45.0%,二组疗效比较,差异有统计学意义(P＜0.05).结论:腹腔镜下手术结合中医治疗多囊卵巢综合征疗效显著,妊娠率高,具有较好的实用价值和推广价值.
半承载式客车车身梁体混合有限元模型分析

在梁单元模型的基础上,采用将复杂部件构建体单元模型的方法建立了半承载式客车车身结构的梁体混合有限元模型,对车身结构进行了强度、刚度和模态分析.并通过静态应力实验,验证了模型的正确性.通过对客车车身结构的应力、位移和模态分析,为客车车身结构的改进和轻量化设计提供了依据.
肝切除治疗肝内胆管结石疗效分析

目的总结治疗肝胆管结石的经验.方法回顾性分析我院1998年8月至2006年1月采取肝切除治疗肝胆管结石97例.肝切除术式:吸刮解剖法切肝;单纯左外叶切除81例,左内叶切除2例,左半肝切除7例,左外叶并右肝第Ⅳ段切除3例,右半肝切除1例,左肝外叶切除并右肝实质切开取石3例,同时行胆肠内引流术47例;术中、术后配合胆道镜探查取石,术后予以中药利胆排石.结果术后出现胆瘘1例(1%),术后肝内残石9例(9.3%),膈下感染2例(2.1%);随访1～8年,优良率达92.4%.结论肝切除是治疗肝胆管结石的安全有效的方法.
双侧卵巢切除术患者的心理干预及随访

目的 探讨双侧卵巢切除术患者心理干预的疗效及方法.方法 收集我院60例双侧卵巢切除术住院患者,随机分为实验组和对照组,各30例,对实验组进行心理干预.对患者术前1 d、术后3 d、术后3个月、术后6个月进行焦虑和抑郁问卷调查,所得数据进行统计学处理.结果 术前1 d、术后3 d实验组和对照组焦虑和抑郁程度差异无显著性(P＞0.05).术后3个月、术后6个月实验组比对照组焦虑和抑郁程度明显降低(P＜0.05或P＜0.01).结论 对双侧卵巢切除术患者的心理干预是十分必要的,并且我们的方法是行之有效的.
原因不明排卵障碍与隐匿性高催乳素血症和垂体微腺瘤的相关性

目的 探讨血清催乳素(PRL)处于正常值范围或曾一过性高PRL血症的原因不明排卵障碍患者,存在着隐匿性高催乳素血症(OHP)及垂体微腺瘤的可能.方法 对53例原因不明排卵障碍而无法诱发优势卵泡患者,分为2组:A组继续促排卵治疗,B组促排卵+溴隐亭治疗,B超动态监测卵泡发育情况.结果 A组治疗有效率34.62%,B组治疗有效率92.57%,可见加用溴隐亭治疗后优势卵泡发生率显著提高(P＜0.01);另外,对19例治疗无效患者进行脑垂体核磁共振(MRI)检查,9例患者发现垂体微腺瘤、10例患者脑垂体未见异常.结论 血清PRL处于正常值范围或曾一次略高于正常值的原因不明排卵障碍患者,应高度重视隐匿性高催乳血症及垂体微腺瘤的可能存在性,及时诊断及治疗,以提高治疗效果.
异体脱细胞真皮基质与自体皮片复合移植治疗增生性瘢痕

目的 探讨异体脱细胞真皮基质与自体皮片复合移植在不同深度烧伤增生性瘢痕部位中的应用及具体操作和注意事项.方法 在56例患者共个78创面用商品化的同种异体脱细胞真皮与自体大张刃厚皮片复合移植,术区选择前臂、小腿、大腿、胸部等非功能部位以及膝关节、踝关节、肩关节、髋关节等功能部位,采用一步法完成.结果 76个创面的复合移植完全成活,前臂、小腿、大腿等非功能部位术区皮片外观、质地和弹性均令人满意,无明显瘢痕形成;胸部术区皮片外观、质地和弹性欠佳,膝关节、踝关节、肩关节、髋关节等功能部位术区皮片外观、质地和弹性绝大多数令人满意,无明显瘢痕形成,关节活动功能明显改善,两个创面因基底血运不良成活欠佳,残留明显瘢痕.结论 一步法复合移植具有较高的成功率,术后效果与术区部位,网状异体脱:细胞真皮基质拉网大小,创面基底,自体刃厚皮片质量有关.
Synthesis and Crystal Structure of [Zn(FcCOO)_2(2,2′-bipy)(H_2O)]_2·H_2O

A novel complex [Zn(FcCOO)_2(2,2′-bipy)(H_2O)]_2·H_2O (Fc = (η~5-C_5H_5)Fe(η~5-C_5H_4), 2,2′-bipy = 2,2′-bipyridine) has been synthesized and characterized by elemental analysis, IR and X-ray diffraction. It crystallizes in monoclinic system, space group P2_1/c with a = 6.8187(4), b = 21.7155(13), c = 19.7411(12)?, α = 90, β = 97.7420(10), γ = 90°, C_(64)H_(58)Fe_4Zn_2N_4O_(11), M_r = 1413.28, V = 2896.4(3)?~3, D_c = 1.620 g/cm~3, Z = 2, F(000) = 1444, μ(MoKα) = 1.857 mm~(-1), R = 0.0523 and w_R = 0.0982 for 3219 observed reflections (I ＞ 2σ(I)). Structural analysis shows that the zinc atom is coordinated with three oxygen atoms from two ferrocenemonocarboxylates and one water molecule together with two nitrogen atoms from 2,2′-bipyridine, giving a distorted square-pyramidal coordination geometry. The complex molecules are linked to form an infinite one-dimensional chain by both intermolecular hydrogen bonds and π-π stacking interactions of the bipyridine rings.
克隆植物生态学术语和概念

近些年来,克隆植物(Clonal plant)的生态学研究在国内外都得到快速发展.在相关科学研究和学术交流中所使用的术语和概念多始于英文文献,而在中文语境中,颇为不一.为促进学术交流和学科发展，尝试推进中文语境中相关术语和概念的一致化，是为本篇要旨。
快速修复苏打草甸碱土植被对土壤盐分和酶活性的影响

苏打草甸碱土是松嫩平原西部盐渍土壤类型之一,碱化度大,pH达10以上,形成了寸草不生的光碱斑,造成了草场退化和生态环境的恶化.通过采用碱斑堆肥、覆盖等措施对盐渍土植被重建试验，能使光碱斑当年得到修复，覆盖率达到90％ 以上，pH下降到8．5以下。为进一步阐明改良效果，本文将对草甸碱土改良后的盐分变化及土壤酶活性进行探讨。由于土壤酶参与土壤各种生物化学反应过程，与土壤供应养分能力密切相关，而且土壤中酶的种类繁多，本文选择具有代表性的酶(土壤过氧化氢酶、脲酶和磷酸酶)的活性进行研究。这主要因为土壤过氧化氢酶的活性可以表征土壤总的生物学活性和肥力状况。土壤脲酶活性与土壤的微生物量、有机质，全氮和速效氮含量呈正相关。土壤脲酶活性可表征土壤的氦素状况。土壤中有机磷往往要在土壤磷酸酶的酶促作用下，才能转化成为植物可利用形态。土壤磷酸酶的活性直接影响土壤中磷的有效性。因而，研究碱化土壤过氧化氢酶、脲酶和磷酸酶的活性及其与盐分关系尤为重要。
钙、钾、锌肥和秸秆肥对抑制菜心吸收镉的效果

比较了在低镉污染(1.453mg kg~(-1))和高镉污染(3.135mg kg~(-1))条件下,钙、钾、锌肥和秸秆肥对抑制菜心吸收镉的效果.盆钵试验结果表明:施用秸秆肥的处理,菜心地上部分和地下部分的镉含量均显著低于其它三个处理.
BIOLOG微平板技术在土壤微生态研究中的应用

BIOLOG微平板技术是一种新型的鉴定物种群落结果多样性和均匀度的方法.随着土壤微生态研究的发展,这种方法在土壤微生态的研究上同样能够起到很好的效果.通过实验表明,应用BIOLOG技术可以明确反映土壤微生态的变化情况.与传统的平板计数法相比,可以更加有效地反映土壤微生物活性.
直接电导检测离子排斥色谱法测定C_1～C_6脂肪族有机酸

建立了直接电导检测离子排斥色谱分离测定C_1～C_6脂肪族有机酸(甲酸、乙酸、丙酸、丁酸、戊酸、己酸)的方法.以Shim-pack SCR-102H色谱柱为分离柱,选用p-甲苯磺酸水溶液为流动相,考察了流动相中p-甲苯磺酸的浓度、流速、pH、色谱柱温度对分离和测定脂肪族有机酸的影响,确定了最佳的色谱条件为:0.2 mmol/L p-甲苯磺酸水溶液作为流动相,流速1.2 mL/min,柱温45 ℃.所测有机酸的检测限为0.03～0.99 mg/L,相对标准偏差在2.3%以下(n=5),回收率为91.2%～105.6%,整个分析过程在28 min内完成.该法用于白酒样品的分析,结果令人满意.
常规细胞形态学检查对良、恶性浆膜腔积液的鉴别诊断价值

浆膜腔积液包括胸水、腹水、心包积液等,常规细胞形态学检查可为临床对良性和恶性积液的鉴别提供较确切的诊断信息.1 材料和方法 1.1 标本来源 为本院2000-2004年的1470例不明原因浆膜腔积液的住院病人,统计时以符合临床最后诊断的检查结果为准.
蔬菜质量安全问题治理分析

蔬菜农药残留超标是我国蔬菜质量安全目前面临的主要问题。提出了我国蔬菜农药残留问题的两个阶段,从经济学角度分析了其出现的原因,并探讨了市场和政府共同治理的必要性。