mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Analysis of Short-circuit Characteristics and Calculation of Steady-state Short-circuit Current for DFIG Wind Turbine

Large-scale doubly-fed induction generator(DFIG)wind turbines are connected to the grid and required to remain grid-connection during faults,the short-circuit current contributed by the generation has become a significant issue.However,the traditional calculation methods aiming at synchronous generators cannot be directly applied to the DFIG wind turbines.A new method is needed to calculate the short-circuit current required by the planning,protection and control of the power grid.The short-circuit transition of DFIG under symmetrical and asymmetric short-circuit conditions are mathematically deduced,and the short-circuit characteristics of DFIG are analyzed.A new method is proposed to calculate the steady-state short-circuit current of DFIG based on the derived expressions.The time-domain simulations are conducted to verify the accuracy of the proposed method.
Small Signal Stability Analysis with Penetration of Grid-connected Wind Farm of PMSG Type

The impacts of large-scale grid-connected wind farm on direct-driven permanent magnet synchronous generator(PMSG)type are discussed on the small signal stability performances of power systems.Firstly,a simplified practical model of wind farm of PMSG type is derived for analyzing small signal stability.The rotor-fluxoriented control strategy is applied to the modelling of PMSG.Secondly,the framework of small signal stability analysis incorporating wind farm of PMSG type is built.Finally,the different simulation scenarios based on the IEEE 3-generator-9-bus test system as benchmark are designed to conduct the eigenvalue analysis and to assess the impacts of wind farm of PMSG type on power system small signal stability.Some conclusions are drawn with simulation results.
Clustering Analysis of Black-start Decision-making with a Large Group of Decision-makers

The optimization of black-start decision-making plays an important role in the rapid restoration of a power system after a major failure/outage.With the introduction of the concept of smart grids and the development of real-time communication networks,the black-start decision-makers are no longer limited to only one or a few power system experts such as dispatchers,but rather a large group of professional people in practice.The overall behaviors of a large decision-making group of decision-makers/experts are more complicated and unpredictable.However,the existing methods for black-start decision-making cannot handle the situations with a large group of decision-makers.Given this background,a clustering algorithm is presented to optimize the black-start decision-making problem with a large group of decision-makers.Group decision-making preferences are obtained by clustering analysis,and the final black-start decision-making results are achieved by combining the weights of black-start indexes and the preferences of the decision-making group.The effectiveness of the proposed method is validated by a practical case.This work extends the black-start decision-making problem to situations with a large group of decision-makers.
Short-circuit Current Characteristics of Wind Generators

To study the effects of wind generators on distribution system protection,the short-circuit current(SCC) characteristics of wind generators is important.Although there are many researches on the issue,a clear agreement has not been reached so far.The SCC characteristics for different wind generators are studied.PSCAD simulation is performed in the same system integrated with different kinds of wind generators,and their results are compared with those reported in IEEE papers.The detection possibility by overcurrent relay(OCR)is discussed based on the simulation results.
Impacts of Large-scale Wind Power Grid Integration on Relay Protection and Countermeasures

Several large-scale wind turbine tripping accidents occurred in Jiuquan wind power base in 2011.According to the on-site survey and analysis of these accidents related to relay protection,causes were found to be the collection system defects and low correct operation rate of small current grounded line selectors of the unearthed neutral point collection system.By referring to both the characteristics of Jiuquan wind power base and arrangement of relay protection,the short-circuit features of wind power and its impacts on relay protection are analyzed.The collection system and the retrofit of the small current grounded line selector are improved by specific countermeasures.Finally,further research subjects are put forward.
温度敏感TRP通道作为神经病理痛药物靶点的研究进展

温度敏感TRP(也被称为thermoTRPs)通道为瞬时感受器电位离子通道家族中的成员,它们是一组重要的感受温度和其它物理及化学伤害性刺激的膜蛋白分子,可参与机体温度感觉及体温调节等重要生命活动。近年来对温度敏感TRP通道的研究证实这组阳离子通道除了参与温度感觉的形成之外,还与痛觉的形成和传导有着极其密切的关系。这些研究揭示此类通道可以作为神经病理痛新型药物靶点。文章概述了thermoTRPs通道作为神经病理痛药物靶点的研究进展和前景。
POLY(METHYL METHACRYLATE)/SOY PROTEIN GREEN COMPOSITES AS GAS BARRIER MATERIALS

Poly(methyl methacrylate)/soy protein(PMMA/SP) composites were prepared by emulsion polymerization method using potassium persulphate(KPS) as the radical initiator.The interaction of soy protein with PMMA was evidenced by Fourier transformed infrared(FT1R) spectroscopy.The structure of PMMA/SP composites was investigated by X-ray diffraction(XRD) study and scanning electron microscopy(SEM).The thermal properties of soy protein and PMMA/SP composites were compared with soy protein and virgin PMMA sample.PMMA/SP composites were found to be flame retardant materials from the measurement of limiting oxygen index(LOI) of samples.The oxygen permeability of PMMA/SP composites was substantially decreased as compared to virgin PMMA.
Landau Damping of Collective Mode in a Quasi-One-Dimensional Repulsive Bose-Einstein Condensate

We investigate the Landau damping of the collective mode in a quasi-one-dimensional repulsive Bose-Einstein condensate by using the self-consistent time-dependent Hartree-Fock-Bogoliubov approximation.We put forward a new method to calculate the Landau damping rate of the collective mode in the condensate and discuss the dependence of the Landau damping on temperature,on transverse trapping frequency,on atom number in the condensate,and on length of the system.Different from the usual calculation method for the three dimension system,our new calculation method is an interactive one by considering the practical relaxation of the elementary excitation.With little approximation,our theoretical calculation results agree with the experimental ones.Comparing with the usual calculation method,our theory is helpful to deduce the inter-particle interactions in damping phenomenon.
A Remark on the Beale-Kato-Majda Criterion for the 3D MHD Equations with Zero Kinematic Viscosity

In this paper,we study the blow-up criterion of smooth solutions to the 3D magneto-hydrodynamic system in B~0_(∞,∞).We show that a smooth solution of the 3D MHD equations with zero kinematic viscosity in the whole space R 3 breaks down if and only if certain norm of the vorticity blows up at the same time.
Geochemical Analysis on Educts in the Drainage Corridor of a Big Dam over Yangtze River

The analysis of educts has become an important aspect for the security evaluation of hy-draulic construction. Brown, white-based colloidal educts appeared in the left drainage corridors of the dam over the Yangtze River after its 5-year operation, which did not happen in the initial investigation. In this article, the physics characteristics of the educts were affirmed, and the analysis results of the major and trace elements among educts and the corresponding location of water samples, core samples, indicate that educts are the products from the chemical potential erosion of the dam foundation rock. Brown educts are uncertainties Fe and Mn-based materials, mainly derived from the corrosion of the chlorite and biotite, which may be caused by the changes of the oxidizing condition. White educts mainly with Si and Ca are derived from the corrosion of the calcite, feldspar, and partly invalidation of foundation curtain. Additionally, similarities of the chondrite normalized rare earth element (REE) patterns between educts and bedrock further illustrate homologous, and Ce and Eu anomalies relative to chondrite reflect changes of the water environment condition.
Calcite Cements in Burrows and Their Influence on Reservoir Property of the Donghe Sandstone, Tarim Basin, China

Abundant burrows of Skolithos linearis, Palaeophycus tubularis, and Taenidium barretti are preserved in the Upper Devonian Donghe sandstone of Tarim basin, China. They are commonly highlighted in core by the color of the burrow fill in contrast to the surrounding matrix and have dif-ferent textures and fabrics from the matrix. There are three kinds of calcite cements in burrows, microcrystalline-crystalline calcite cement, mosaic calcite cement, and ferroan calcite cement. Microcrystalline-crystalline calcite cement is widely distributed in the lower part of the Donghe sand-stone, but it is rare in burrows filling. It displays a globule structure under burial cementation and sel-dom replaces the quartz grains in shallow burial depth stage. Mosaiccalcite cement is widespread in the Donghe sansdtone reservoir of North Tarim basin. It shows chrysoidine, orange and bright orange lu-minescence, and intensely replaces the quartz grains, forming in early diagenetic and shallow burial depth stage. Ferroan calcite is asymmetrically distributed in the Donghe sandstone reservoir of Central Tarim basin. It fills the remanent pores in the shape of mosaic and replaces the quartz grains, matrix, and early calcite cement, forming in late diagenetic and deep burial depth stage. The burrows filled with white calcite cements have low oil saturation or may be oil-stained. In contrast, there is high oil saturation in the sandstone reservoir where the bioturbation is sparse or not present. With increased bioturbation, the porosity, permeability, and oil saturation decrease; thus, bioturbation intensity and reservoir property appear to be negatively correlated.
Timing of Precambrian Basement from East Segment of Tiekelike Tectonic Belt, Southwestern Tarim, China: Constrains from Zircon U-Pb and Hf Isotopic

This study focuses on the determination of the age and provenance of a Precambrian unit on the southwestern margin of the Tarim craton, collectively known as the Ailiankate (埃连卡特) Group and Sailajiazitage (塞拉加兹塔格) Group, which were previously referred to as Paleoprotero-zoic-Mesoproterozoic. Zircon U-Pb LA-ICP-MS dating of chlorite quartz schist and tuff that form the Ailiankate Group and Sailajiazitage Group have yielded age peaks at 780 and 787 Ma, respectively. These data indicate that the Ailiankate and Sailajiazitage groups are Neoproterozoic succession depos-ited at ca. 740-790 Ma. Those strata are temporally equivalent and are likely parts of a single wide spread succession and reflect a rifting process related to the break-up of the Rodinia supercon-tinent. In situ zircon Hf isotopic data from Saila-jiazitage Group show that older zircons (~1 994 Ma) have crustal model ages of 2 272-2 784 Ma, suggesting an ancient crustal growth and re-working. The ~787 Ma zircons have ~2 000 Ma crustal model ages, suggesting derivations from recycled Paleoproterozoic material.
2010年度全国采供血机构及部分医院输血科血型血清学室间质控错误分析

目的分析2010年度上海市血液中心发放的全国血型血清学室间质控品返回的错误检测结果的原因。方法采用国际血型参比实验室(iBGRL)建立的国际血型血清学室间评分标准,对参评的65家血站及医院输血科或血库血型实验室的回执评分,并计算各项试验的正确率,寻找错误原因。结果全国血站血型室及部分医院血输的ABO定型(包括亚型)正确率为91.5%[243/345:同参考答案数/参评标本数(60×3+65×3)],RhD定型正确率为100%,抗体筛选的正确率为97.86%(367/375),抗体鉴定的正确率为92.97%(172/189:同参考答案数/需参评标本数),交叉配合试验的正确率为99.20%(1 116/1 125)。结论1)血站血型实验室和医院输血科对ABO亚型的血清学鉴定存在一定缺陷,特别是针对表达较弱的ABO亚型鉴定尚需改进;2)部分实验室抗体筛选存在漏检或鉴定错误,说明漏检实验室所用的血清方法学应进一步改进,鉴定错误的实验室需要改进单特异性抗体和联合抗体的鉴定以及特异性抗体的反应条件等,要对不同的特异性抗原设定不同的反应温度与介质能够区分,避免造成免疫性输血反应;3)交叉配合试验的错误率提示需要对交叉配合试验的方法学加以改进。
Synthesis of BiOCl photocatalyst by a low-cost,simple hydrolytic technique and its excellent photocatalytic activity

A novel photocatalyst,bismuth oxychloride(BiOCl) micro-nano particles with a fine ferrite plate structure,was prepared by a low-cost,simple hydrolytic method.The as-prepared BiOCl was characterized by scanning electron microscopy(SEM),thermogravimetric analysis-differential thermal analysis(TGA-DTA),X-ray diffraction(XRD),and UV-vis diffuse reflectance spectra(DRS).The effects of preparation conditions such as sodium dodecyl benzene sulfonate(SDBS) dispersant,HCl concentration,and heat treatment temperature on BiOCl performances were investigated.Moreover,its photocatalytic activity was evaluated on the degradation of methylene orange(MO) and was compared with that of TiO_2(P25).The experimental results confirmed that BiOCl micro-nano particles prepared with SDBS,the HCl concentration of 1.5 mol/L,and the heat treatment temperature of 80°C exhibited the best performance for the photodegradation of MO solution,and they showed good stability and better photocatalytic activity than P25 photocatalyst.
THE RECURSIVE SOLUTION OF QUEUE LENGTH FOR Geo/G/1 QUEUE WITH N-POLICY

This paper considers a discrete-time queue with N-policy and LAS-DA (late arrival system with delayed access) discipline. By using renewal process theory and probability decomposition techniques, the authors derive the recursive expressions of the queue-length distributions at epochs n~?, n~+, and n. Furthermore, the authors obtain the stochastic decomposition of the queue length and the relations between the equilibrium distributions of the queue length at different epochs (n~?, n~+, n and departure epoch D_n).
RUIN PROBABILITIES WITH PAIRWISE QUASI-ASYMPTOTICALLY INDEPENDENT AND DOMINATEDLY-VARYING TAILED CLAIMS

This paper considers the nonstandard renewal risk model in which a part of surplus is invested into a Black-Scholes market whose price process is modelled by a geometric Brownian motion, claim sizes form a sequence of not necessarily identically distributed and pairwise quasi-asymptotically independent random variables with dominatedly-varying tails. The authors obtain a weakly asymptotic formula for the finite-time and infinite-time ruin probabilities. In particular, if the claims are identically distributed and consistently-varying tailed, then an asymptotic formula is presented.
Aberrant methylation of SPARC in human hepatocellular carcinoma and its clinical implication

AIM:To investigate the methylation status of secreted protein acidic and rich in cysteine(SPARC) in human hepatocellular carcinoma(HCC) and evaluate its clinical implication.METHODS:The methylation status of SPARC was analyzed in one HCC cell line(SMMC-7721) and 60 pairs of HCC and corresponding nontumorous tissues by methylation-specific polymerase chain reaction and bisulfite sequencing.The expression of SPARC mRNA and protein were examined by reverse transcription polymerase chain reaction and immunohistochemistry,respectively.The correlations between the methylation status and the gene expression,the clinicopathological parameters,as well as the prognosis after surgery were analyzed.RESULTS:In the SMMC-7721 cell line,the loss of SPARC expression was correlated with the aberrant methylation and could be reactivated by the demethylating agent 5-aza-2’-deoxycytidine.Methylation frequency of SPARC in HCC was significantly higher than that in the corresponding nontumorous tissues(45/60 vs 7/60,P < 0.001),and it was correlated with the pathological classification(P = 0.019).The downregulation of the SPARC mRNA expression in HCC was correlated with the SPARC methylation(P = 0.040).The patients with methylated SPARC had a poorer overall survival than those without methylated SPARC(28.0 mo vs 41.0 mo,P = 0.043).CONCLUSION:Aberrant methylation is an important mechanism for SPARC inactivation in HCC and SPARC methylation may be a promising biomarker for the diagnosis and prognosis of HCC.
BRIEF ARTICLE New reduced volume preparation regimen in colon capsule endoscopy

AIM:To evaluate the effectiveness of our proposed bowel preparation method for colon capsule endoscopy.METHODS:A pilot,multicenter,randomized controlled trial compared our proposed "reduced volume method"(group A) with the "conventional volume method"(group B) preparation regimens.Group A did not drink polyethylene glycol electrolyte lavage solution(PEGELS) the day before the capsule procedure,while group B drank 2 L.During the procedure day,groups A and B drank 2 L and 1 L of PEG-ELS,respectively,and swallowed the colon capsule(PillCam COLON capsule).Two hours later the first booster of 100 g magnesium citrate mixed with 900 mL water was administered to both groups,and the second booster was administered six hours post capsule ingestion as long as the capsule had not been excreted by that time.Capsule videos were reviewed for grading of cleansing level,RESULTS:Sixty-four subjects were enrolled,with results from 60 analyzed.Groups A and B included 31 and 29 subjects,respectively.Twenty-nine(94%) subjects in group A and 25(86%) subjects in group B had adequate bowel preparation(ns).Twenty-two(71%) of the 31 subjects in group A excreted the capsule within its battery life compared to 16(55%) of the 29 subjects in group B(ns).Of the remaining 22 subjects whose capsules were not excreted within the battery life,all of the capsules reached the left side colon before they stopped functioning.A single adverse event was reported in one subject who had mild symptoms of nausea and vomiting one hour after starting to drink PEG-ELS,due to ingesting the PEG-ELS faster than recommended.CONCLUSION:Our proposed reduced volume bowel preparation method for colon capsule without PEG-ELS during the days before the procedure was as effective as the conventional volume method.
Experience after 100 patients treated with cytoreductive surgery and hyperthermic intraperitoneal chemotherapy

AIM:To investigate perioperative patient morbidity/mortality and outcome after cytoreductive surgery(CRS) and hyperthermic intraperitoneal chemotherapy(HIPEC).METHODS:Of 150 patients 100 were treated with cytoreductive surgery and HIPEC and retrospectively analyzed.Clinical and postoperative follow-up data were evaluated.Body mass index(BMI),age and peritoneal carcinomatosis index(PCI) were chosen as selection criteria with regard to tumor-free survival and perioperative morbidity for this multimodal therapy.RESULTS:CRS with HIPEC was successfully performed in 100 out of 150 patients.Fifty patients were excluded because of intraoperative contraindication.Median PCI was 17(1-39).In 89% a radical resection(CC0/CC1) was achieved.One patient died postoperatively due to multiorgan failure.Neither PCI,age nor BMI was a risk factor for postoperative complications/outcome according to the DINDO classification.In 9% Re-CRS with HIPEC was performed during the follow-up period.CONCLUSION:Patient selection remains the most important issue.Neither PCI,age nor BMI alone should be an exclusion criterion for this multimodal therapy.
颈-眼动脉瘤破裂致蛛网膜下腔出血死亡1例

当在实践中遇到蛛网膜下腔出血时，脑部血管的检查至关重要。其常用方法是在未经固定的脑标本上，小心除去表面的血凝块和血液，并仔细寻找破裂口或病变血管，可向基底动脉注射生理盐水或亚甲蓝溶液，同时观察液体渗出的部位，以达到破裂口定位的目的。鉴于本案例，脑动脉瘤破裂并不是发生在常见的脑底动脉环内，而在位置较隐蔽的眼动脉，法医工作者常忽略该部位的检查，甚至在取脑的过程中破坏颈内动脉与眼动脉分支（该处为好发部分），造成无法检验。笔者认为，在涉及蛛网膜下腔出血的案例中，尤其死者为生前存在头痛、头晕及视觉症状的中年女性时，应尤为注意保护颈内动脉及其各主要分支的结构，并当场进行仔细检查。
桶人综合征及模拟征的病因及临床特点(附1例报告)

桶人综合征(Man-in-the-barrel syndrome,MIBS)是指单纯双上肢麻痹而头部和下肢功能保留。经典的桶人综合征是指由于低灌注引起大脑前、中动脉分水岭区梗死所致的急性双上肢麻痹,由其他原因如脑桥、脊髓、周围神经损害所致的双臂瘫痪则称之为桶人综合征的模拟征,也有的学者仍称其为桶人综合征。不管什么原因所致,这类疾病都有着类似的表现，即患者都表现为双上肢麻痹，如同被束缚在一个桶子里而限制了上肢的运动，故有此名。Dide和Lhermitte首先在1917年描述了“双上肢麻痹这一现象，1962年Mohr又报道了分水岭梗死所致双臂瘫痪。而桶人综合征这一术语由Sage在1983年报道了脑低灌注所致急性双上肢麻痹后正式提出[8]，并在1986年与VanUitertRL对34例低灌注患者进行了前瞻性研究[9]，结果有11例患者发展成为桶人综合征。从这一术语的历史演变来看，桶人综合征及模拟征只是对表现为双上肢麻痹这类疾病的形象描述，任何同时支配双上肢的从中枢到周围的神经结构受累都可以表现为桶人综合征，所以桶人综合征或其模拟征的病因是多样的。臂丛损害常见于外伤，常为单侧受累，双侧受累在国内文献中鲜有报道。本文旨在报道1例以桶人综合征形式起病的双侧臂丛神经损害1例，并对桶人综合征及其模拟征的常见病因及临床特点进行文献回顾分析，供读者临床参考。
Syntheses and Structural Characterization of Dimethyltin Complexs of N-(3-Methoxysalicylidene)-α-amino Acid

Three new dimethyltin complexes of N-(3-methoxysalicylidene)-α-amino acid,(CH_3)_2Sn(3-CH_3O-2-OC_6H_3CH=NCHRCOO)(R = H,1;CH_3,2;(CH_3)_2CH,3),have been synthe-sized by treating dimethyltin dichloride with the potassium salt of the ligand and characterized by elemental analysis,IR and 1H NMR spectra.The crystal structure of [(CH_3)_2Sn(3-CH_3O-2-OC_6H_3CH=NCH_2COO)(CH_3OH)]_2 H_2O(1a),formed from methanol solution of 1,has been deter-mined.The crystal belongs to the monoclinic system,space group C/2c with a = 20.636(3),b = 7.8854(9),c = 20.668(2) A,β= 113.265(2)°,V = 3089.7(6) A~3,Z = 4,Dc = 1.707 g/cm~3,= 1.675 mm~(-1),F(000) = 1592,R = 0.0301 and wR = 0.0841.In complex 1a,the tin atom is six-coordinate and possesses a distorted [SnC_2NO_3] octahedral geometry with the two methyl groups occupying the trans positions.The weak Sn O interactions and intermolecular hydrogen bonds connected the molecules into an infinite chain.
Effect of Coagulation and Diffusion on Nanoparticle Distribution in a Fully Developed Turbulent Boundary Layer

Nanoparticle distributions in a fully developed turbulent boundary layer are simulated numerically using the moment method. The effects of Schmidt number and Damkohler number on the nanoparticle distribution are studied. It is found that the particle number concentration and total particle mass increase from the wall to the outside. The difference of particle number concentration and total particle mass near the wall and near the outside becomes smaller with the increasing Schmidt number Sc. The particle diameter and geometric standard deviation increase from the wall to the outside at a fixed Damkohler number Da, and grow with the increase of Da at the same lateral position.
Flat Supercontinuum Generation within the Telecommunication Wave Bands in a Photonic Crystal Fiber with Central Holes

Flat supercontinuum in the telecommunication wave bands of E+S+C is generated by coupling a train of femtosecond pulses generated by a mode-locked Ti:sapphire laser into the fundamental mode of a photonic crystal fiber with central holes fabricated in our lab. The pulse experiences the anomalous dispersion regime, and the soliton dynamic effect plays an important role in supercontinuum generation. The output spectrum in the wavelength range of 1360–1565nm does not include significant ripples due to higher pump peak power, and the normalized intensity shows less fluctuation.
A Stable 22-W Low-Noise Continuous-Wave Single-Frequency Nd:YVO_4 Laser at 1.06 μm Directly Pumped by a Laser Diode

We report a low-noise continous-wave single-frequency Nd:YVO_4 laser at 1.06 μm directly pumped by an 880-nm laser diode. A maximum output power of 22W is achieved with an optical-to-optical conversion efficiency of 46.3%. The stability of the output is better than ±0.7% in the given four hours. The output beam is almost diffraction-limited with a measured beam quality of M_x~2 = 1.05 and M_y~2 = 1.02. The intensity noise and the phase noise of the laser reach the shot-noise limit at an analysis frequency of 5 MHz.
听力重建技术的过去与未来

听力重建旨在应用手术方法提高或恢复由于不同原因或疾病造成的传音结构功能障碍所致的听力损失。1952年Wullstein和Zollner提出了围绕听骨链重建(ossicular chain reconstruction,OCR)为中心的鼓室成形术的系统分类方法，从而奠定了耳显微外科及传导性聋听力重建技术的基础。当代科学技术的进步，尤其是听觉电生理、材料科学、工程力学、微电子技术等学科的快速发展，更为听力重建提供了前所未有的先进技术手段，开辟了更加广阔的发展前景，同时大大增强了耳科学家战胜困难、迎接挑战的信心。然而，随着物质生活水平的不断提高，人们对于听力的需求也越来越高，听力重建仍然是耳科医生值得关注的热点问题之一。
肝硬化肠道微生态失衡及益生菌的应用

在正常生理状态下,肠道微生态系统与肝脏构成一个复杂、相互的生物控制环,并保持着稳定的肠-肝轴平衡,两者相互影响、互为因果,对机体发挥着积极的作用。如平衡被打破,将会导致恶性循环,出现各种病理生理问题。研究表明,肠道微生态失衡在肝硬化的发生、发展过程中起着重要的作用。本文对肝硬化肠道微生态失衡及益生菌应用的相关文献报道作一综述。
扶正祛邪中药复方含药血清抗白血病细胞HL60及HL60/VCR细胞的体外实验研究

目的通过体外实验观察扶正祛邪中药复方含药血清对急性早幼粒白血病细胞HL60及长春新碱诱导的耐药细胞株HL60/VCR细胞的生长抑制率。方法采用四氮唑蓝(MTT)比色法,选择白血病敏感细胞株HL60细胞以及长春新碱诱导的白血病多药耐药细胞株HL60/VCR细胞为靶细胞,观察不同浓度(5%、10%、15%、20%、25%)扶正祛邪含药兔血清对其的生长抑制率。结果扶正祛邪含药兔血清对HL60/VCR及HL60均有明显的抑制作用,且其对HL60/VCR的细胞毒作用呈剂量依赖性。结论扶正祛邪复方中药具有一定的抑制白血病细胞及耐药细胞的作用。
氮肥施用对重金属铅在三峡库区消落带土壤中吸附-解吸行为的影响

三峡工程因"蓄清排浑"的排沙方式、"冬蓄夏排"的运行方式,每年周期性地产生约30 m的库水位差,形成面积约80—90 km~2的消落带.消落带土地资源具有较高的生产潜力.土地资源能否利用的关键问题是污染程度,特别是重金属污染.铅是重金属类环境激素物质之一,对人体和其它动物具有类似雌激素作用.因此,开展三峡库区消落带主要土壤类型对重金属铅吸附-解吸行为的研究,可为三峡库区铅污染的风险评价、预测和土地资源利用提供依据.