mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Effects of elevated CO_2 concentration and nitrogen supply on biomass and active carbon of freshwater marsh after two growing seasons in Sanjiang Plain, Northeast China

An experiment was carried out with treatments differing in nitrogen supply (0, 5 and 15 g N/m~2) and CO_2 level (350 and 700 μmol/mol) using OTC (open top chamber) equipment to investigate the biomass of Calamagrostis angustifolia and soil active carbon contents after two years. The results showed that elevated CO_2 concentration increased the biomass of C. angustifolia and the magnitude of response varied with each growth period. Elevated CO_2 concentration has increased aboveground biomass by 16.7% and 17.6% during the jointing and heading periods and only 3.5% and 9.4% during dough and maturity periods. The increases in belowground biomass due to CO_2 elevation was 26.5%, 34.0% and 28.7% during the heading, dough and maturity periods, respectively. The response of biomass to enhanced CO_2 concentration differed in N levels. Both the increase of aboveground biomass and belowground biomass were greater under high level of N supply (15 g N/m~2). Elevated CO_2 concentration also increased the allocation of biomass and carbon in root. Under elevated CO_2 concentration, the average values of active carbon tended to increase. The increases of soil active soil contents followed the sequence of Microbial biomass carbon (10.6%) > dissolved organic carbon (7.5%) > oxidable labile carbon (6.6%) > carbohydrate carbon (4.1%). Stepwise regressions indicated there were significant correlations between the soil active carbon contents and plant biomass. Particularly, microbial carbon, oxidable labile carbon and carbohydrate carbon were found to be correlated with belowground biomass, while dissolved organic carbon has correlation with aboveground biomass. Therefore, increased biomass was regarded as the main driving force for the increase in soil active organic carbon under elevated CO_2 concentration.
Phosphorus utilization and microbial community in response to lead/iron addition to a waterlogged soil

Constructed wetlands have emerged as a viable option for helping to solve a wide range of water quality problems. However, heavy metals adsorbed by substrates would decrease the growth of plants, impair the functions of wetlands and eventually result in failure of contaminant removal. Typha latifolia L., tolerant to heavy metals, has been widely used for phytoremediation of Pb/Zn mine tailings under waterlogged conditions. This study examined effects of iron as ferrous sulfate (100 and 500 mg/kg) and lead as lead nitrate (0, 100, 500 and 1000 mg/kg) on phosphorus utilization and microbial community structure in a constructed wetland. Wetland plants (T. latifolia) were grown for 8 weeks in rhizobags filled with a paddy soil under waterlogged conditions. The results showed that both the amount of iron plaque on the roots and phosphorus adsorbed on the plaque decreased with the amount of lead addition. When the ratio of added iron to lead was 1:1, phosphorus utilized by plants was the maximum. Total amount of phospholipids fatty acids (PLFAs) was 23%-59% higher in the rhizosphere soil than in bulk soil. The relative abundance of Gram-negative bacteria, aerobic bacteria, and methane oxidizing bacteria was also higher in the rhizosphere soil than in bulk soil, but opposite was observed for other bacteria and fungi. Based on cluster analysis, microbial communities were mostly controlled by the addition of ferrous sulfate and lead nitrate in rhizosphere and bulk soil, respectively.
Infiltration characteristics of non-aqueous phase liquids in undisturbed loessal soil cores

The widespread contamination of soils and aquifers by non-aqueous phase liquids (NAPL), such as crude oil, poses serious environmental and health hazards globally. Understanding the infiltration characteristics of NAPL in soil is crucial in mitigating or remediating soil contamination. The infiltration characteristics of crude and diesel oils into undisturbed loessal soil cores, collected in polymethyl methacrylate cylindrical columns, were investigated under a constant fluid head (3 cm) of either crude oil or diesel oil. The infiltration rate of both crude and diesel oils decreased exponentially as wetting depth increased with time. Soil core size and bulk density both had a significant effect on NAPL infiltration through the undisturbed soil cores; a smaller core size or a greater bulk density both reduced oil penetration to depth. Compacting soil in areas susceptible to oil spills may be an effective way to reduce contamination. The infiltration of NAPL into soil cores was spatially anisotropic and heterogeneous, thus recording the data at four points on the soil core is a good way to improve the accuracy of experimental results. Our results provided information about crude and diesel oils, rather than their components, and may have practical value for remediation of contaminated loessal soils.
Catalytic reduction of nitric oxide with carbon monoxide on copper-cobalt oxides supported on nano-titanium dioxide

A series of copper-cobalt oxides supported on nano-titanium dioxide were prepared for reduction of nitric oxide with carbon monoxide and characterized using techniques such as XRD, BET and TPR. Catalyst CuCoOx/TiO_2 with Cu/Co molar ratio of 1/2, Cu-Co total loading of 30% at the calcination temperature of 350℃ formed CuCo_2O_4 spinel and had the highest activity. NO conversion reached 98.9% at 200℃. Mechanism of the reduction was also investigated, N_2O was mainly yielded below 100℃, while N_2 was produced instead at higher temperature. O_2 was supposed to accelerate the reaction between NOx and CO for its oxidation of NO to give more easily reduced NO_2, but the oxidation of CO by O_2 to CO_2 decreased the speed of the reaction greatly. Either SO_2 or H_2O had no adverse impact on the activity of NO reduction; however, in the presence of both SO_2 and H_2O, the catalyst deactivated quickly.
Microwave thermal remediation of crude oil contaminated soil enhanced by carbon fiber

Thermal remediation of the soil contaminated with crude oil using microwave heating enhanced by carbon fiber (CF) was explored. The contaminated soil was treated with 2.45 GHz microwave, and CF was added to improve the conversion of microwave energy into thermal energy to heat the soil. During microwave heating, the oil contaminant was removed from the soil matrix and recovered by a condensation system of ice-salt bath. The experimental results indicated that CF could efficiently enhance the microwave heating of soil even with relatively low-dose. At 0.1 wt.% CF, the soil could be heated to approximately 700℃ within 4 min using 800 W of microwave irradiation. Correspondingly, the contaminated soil could be highly cleaned up in a short time. Investigation of oil recovery showed that, during the remediation process, oil contaminant in the soil could be efficiently recovered without causing significant secondary pollution.
Characterizing spatial distribution and sources of heavy metals in the soils from mining-smelting activities in Shuikoushan, Hunan Province, China

The spatial variation of heavy metals in the soils in Shuikoushan mining-smelting area, Hunan Province, China, was investigated using multivariate and geo-statistic analysis. A total of 106 composite soil samples were collected in an area of about 100 km~2. Concentrations of total arsenic (As), Cd, Pb, Zn, Cu and Cr were measured using inductively coupled plasma mass spectrometry (ICP-MS). Arsenic and Pb were found to have a common source, indicating the same sources and spreading processes, such as aerosols and airborne particulates from smelting chimneys. Airborne sources from smelting chimneys contributed greatly to Cd in the area, which demonstrated the same dispersion pattern as As and Pb. However, two hot spots of Cd around smelters were possibly enlarged by wastewaters, demonstrating another important source of Cd in Shuikouhsan. Geo-statistic interpolated mapping demonstrated that hot-spots of Zn were only found proximal to the large smelters, suggesting that Zn primarily came from the chimneys of larger smelters. The major Cu hot-spots appeared closely to the tailing dam, indicating that weathering and leaching of tailings were the major sources of Cu contamination in Shuikoushan. Our findings indicated that airborne volatile particles and aerosols contributed the most to As, Cd, Pb, Zn and Cu contamination, while Cd and Cu may also derive from the discharge of wastewater from smelters and the leaching of tailings, respectively.
牡蛎多糖的分离和纯化

采用醇沉法分离牡蛎多糖,苯酚-硫酸法测定其含量,凝胶层析法纯化牡蛎多糖.牡蛎粗提物的多糖含量为36.7%;醇沉法多糖得率为33%,回收率为78.9%;牡蛎多糖可能含有4种组分的多糖成份.
樟子松嫁接育苗速生丰产浅析

樟子松作为大兴安岭林区主要成林乡土树种,具有耐严寒、耐贫瘠和水湿、抗火烧及抗病虫害能力较强等特点.但长期以来,人们沿用传统的播种育苗方法,从种子萌发到成苗上山造林至少需要3～5 a的时间;而采用嫁接育苗方法,当年嫁接成活,第二年即可植苗造林,大大缩短了苗木培育的进程,并且具有生长迅速、达到生理成熟龄及数量成熟龄早等优点,可以极大地提高樟子松速生丰产.根据大兴安岭地区林业科学研究所多年的研究试验,现将其技术总结如下:
优质高产家庭用粉小麦新品种克丰13选育及主要栽培技术

克丰13为高产、优质、抗病、喜肥类型,具有分蘖力强、繁茂性好,结实期耐湿,对秆锈病免疫,赤霉病、根腐病轻,抗倒伏等特性,增产潜力大.克丰13是1995年以克94F_4-407为母本,克94品资预263(克丰3号/多年生1号)为父本,进行有性杂交,经过南繁加代、系谱选择法于2000年选育而成的新品种,品种代号00-2072,于2007年经国家农作物品种审定委员会审定通过.
黑龙江省农业信息传达

对农业信息从发布到使用的传达途径进行研究.分析现阶段农民与各种信息传达媒介的接触状况和农民对信息接收情况.结果显示黑龙江省信息的传递是以农业推广组织为主渠道,其他形式为辅助的信息传达模式.在所有与各种媒介接触中,农民接触最多的是电视、电话、推广员,效果最好是推广员.
政府环境绩效评估中隐性绩效初探

政府环境绩效存在滞后现象,根据绩效在时间轴上的分布,提出显性绩效和隐性绩效,并定义这2类绩效.依据行为科学中的期望理论提出,在进行绩效评估时把隐性绩效考虑其中.提高目标价值估计,或通过创造条件,提高目标实现的概率,都能激发出领导者对环境保护、生态建设更高的积极性.
2009年日本高血压诊治指南概述

2009年2月,日本高血压学会(JSH)发布新的高血压防治指南,内容包括流行病学、危险分层、诊断评估、治疗及预后等[1].由于同属于亚洲人群,该指南可能对我国高血压防治有一定借鉴意义.
舒芬太尼给药模式对妇科腹腔镜手术患者术后麻醉恢复质量的影响

目的 研究舒芬太尼不同给药模式对妇科腹腔镜患者术后麻醉恢复质量的影响,探讨此类手术舒芬太尼较佳给药模式.方法 选择60例妇科择期行腹腔镜手术患者,ASA Ⅰ～Ⅱ级,根据舒芬太尼给药模式随机分为间断推注给药组和血浆靶控给药组.所有患者常规连续监测收缩压(SBP)、舒张压(DBP)、心率(HR)、心电图(ECG)、呼气末二氧化碳分压(PetCO_2),分别记录两组患者手术时间、舒芬太尼用量、丙泊酚用量、呼吸恢复时间、睁眼时间、拔管时间、出手术时Ramsay 镇静评分、VAS评分.结果 间断推注组与靶控输注组相比,舒芬太尼用量明显减少(P<0.05),丙泊酚用量两组差异无统计学意义(P>0.05),患者呼吸恢复时间、睁眼时间、拔管时间间断推注组均明显缩短(P<0.05),但出手术室时靶控输注组Ramsay评分较高(P<0.05),VAS评分两组差异无统计学意义(P>0.05).结论 舒芬太尼两种常用的给药模式均能较好地应用于妇科腹腔镜患者,间断推注给药患者券醒更快.
广东省梅州市新生儿疾病筛查网络信息管理网站的开发与应用

梅州市新生儿疾病筛查工作于2005年10月13日启动,由全市168家设有产科的医疗保健单位组成全市新生儿疾病筛查网络,筛查中心设于梅州市妇幼保健院.梅州市新生儿筛查工作年约筛查40 000～50 000例,工作量较大,各筛查单位分散于全市各县城和乡镇,分布范围很广,筛查中心如果采取传统的方法,则需要将每例筛查报告通过邮局寄送给各筛查单位,花费巨大,工作繁琐,以目前筛查中心的条件无法进行此项工作.实际工作中,市筛查中心在此网站开通之前,只能靠挂号信寄送阳性报告,正常结果不发报告.
基因重组凝血因子Ⅶa在心脏直视术后严重渗出血患者中的应用

目的 观察基因重组凝血因子Ⅶa(rFⅦa)在心脏直视术后严重渗出血患者中的应用效果.方法 选择40例心内直视术后连续3 h心包纵隔引流量>2 mL/(kg·h)的患者,在应用传统止血方法临床效果不明显后,改用rFⅦa(20～40μg/kg)单次静脉注射,观察心包纵隔引流量的变化、监测凝血指标,并记录各种不良反应和(或)并发症.结果 40例患者应用rFⅦa后有35例引流量显著减少,与应用前相比引流量由3.54 mL/(kg·h)[2.31～10.3 mL/(kg·h)]降至0.85 mL/(kg·h)[0.45～2.53 mL/(kg·h)](P<0.05),5例引流量仍较多,予二次开胸探查发现其中3例为活动性出血;活化部分凝血活酶时间(APTT)、凝血酶原时间(PT)在应用rFⅦa后明显缩短(P<0.05);未见明显不良反应及血栓形成等相关并发症.结论 rFⅦa对心内直视术后出现严重渗出血患者具有良好的止血效果,未发现明显不良反应及相关并发症.
一种术后镇痛的新方法——自控-靶控镇痛

手术后创伤不可避免地对机体产生不同程度的应激反应和疼痛.疼痛应激一般持续几天到几周,可能会造成呼吸、循环、内分泌和代谢功能等一系列紊乱或失调,从而影响手术效果及术后康复.
Synthesis of Poly(p-phenyleneethynylene)s with Crosslinkable End or Side Groups and Its Solid State Structure and Optical Properties Before and after Crosslinking

Two crosslinkable poly(p-phenyleneethynylene)s(PPEs): poly[2,5-di(2'-ethyl-hexyloxy)-1,4-phenylenee-thynylene] with end-capped vinyl(PPEl) and poly[2,5-di(allyloxy)-1,4-phenyleneethynylene-2,5-di(2'-ethyl-hex-yloxy)-1,4-phenyleneethynylene](PPE2) were synthesized. Via the thermal addition reactions of vinyl end groups of PPE1 and allyloxy side groups of PPE2, crosslinked polymers C-PPE1 and C-PPE2 were obtained, respectively. The two polymers were characterized by wide-angle X-ray diffraction(WXRD), ultraviolet-visible(UV-Vis) absorption, and photoluminescence(PL). The results indicate that in the solid state, the polymer chains of PPE1 were packed with a low degree of crystallinity because of the sterically hindered(2'-ethyl-hexyl)oxy branched side chains, but, because of the introduction of allyloxy side chains, the polymer chains of PPE2 were packed in an order fashion with a high degree of crystallinity. Because of the high crosslinking density in C-PPE2, the formation of aggregates and excimer was hampered by the formed crosslinking network more effectively in C-PPE2 film than in C-PPE1 film.
Synthesis and Analytical Application of Bis(2-diazoaminobenzothiazoyl)-benzidine to Determination of Mercury Ion by Fluorimetry

A new fluorescent reagent bis(2-diazoaminobenzothiazoyl)-benzidine(BDABTB) was synthesized by combining benzothiazole with benzidine and triazene reagent. The product was confirmed by elemental analysis, 1HNMR and FTIR. The excitation and emission wavelengths of BDABTB were 214 and 338 nm in a basic medium, respectively. The fluorescence was quenched by Hg~(2+) selectively and sensitively. The linear range of Hg~(2+) was 1.0×10~(-8)-1.0×10~(-5) mol/L with a detection limit of 5.0×10~(-10) mol/L. It has been used to determine trace Hg~(2+) in water sample with satisfactory results.
A Quinoline Derivated Chemosensor for Cu~(2+) Recognition

A quinoline derivative N-(2-hydroxyl-naphthylmethyl)-N-(quinol-8-yl)amine(2) was synthesized and characterized, which can selectively recognize Cu~(2+) over other metal ions such as Zn~(2+), Cd~(2+), Sn~(2+), Pb~(2+), Hg~(2+), Ni~(2+), Mg~(2+), Cr~(3+), Mn~(2+), Sr~(2+), K~+, Ca~(2+), Na~+, Ba~(2+) in acetonitrile/water(volume ratio 99:1). Cu~(2+) induced a new absorption peak at 464 nm in the absorption spectrum(ε=4.66×10~2 Lmol~(-1)·cm~(-1)) and quenched the fluorescence emission of quinoline derivative 2. The binding of quinoline derivative 2 to Cu~(2+) was in 1:1 model and stable constant was estimated to be 2.48×10~5 L·mol~(-1).
Synthesis of Poly[2,2'-(m-phenylene)-5,5'-bibenzimidazole]and Poly(2,5-benzimidazole)by Microwave Irradiation

A rapid way assisted by microwave irradiation was proposed to synthesize poly[2,2'-(m-phenylene)5,5'-bibenzimidazole](PBI)and poly(2,5-benzimidazole)(ab-PBI).Synthesis of PBI in polyphospho ric acid is conducted for 20 h or even more.Under microwave irradiation,the polycondensations could be completed in polyphos.phone acid within 3 h from 3,3'-diaminobenzidine tetrahydrochloride(DAB·4HCl·2H_2O)and isophthalic acid for PBI,and from 3,4-diaminobenzoic acids(DABA)for ab-PBI.respectively.The conditions for the polymerization including the power of microwave irradiation,temperature,heating time,and concentrations of the reactants in polyphosphoric acid were optimized.The inherent viscosity of the polymers in concentrated sulfuric acid at 30℃ was 0.9766 dL/g for PBI,and 0.6480 dL/g for ab-PBI,respectively.Characterization of the polymer products was made by nuclear magnetic resonance(~1H NMR),Fourier transform infrared spectra(FTIR)and thermogravimetrjc analysis(TGA).
Synthesis, Structure and Properties of Three-dimensional Gd(Ⅲ), Eu(Ⅲ) Coordination Polymers via in situ Decarboxylation

Two three-dimensional lanthanide(Ⅲ) coordination polymers with the formula [Ln(PYDC)(NA)(H_2O)]n [Ln=Gd(l), Eu(2), H2PYDC=pyridine-2,5-bicarboxylic acid, HNA=nicotinic acid] have been hydrothermally synthesized and characterized by elemental analysis, IR, and single crystal X-ray diffraction. The NA came from in situ decarboxylation of the part of PYDC. X-ray single crystal structural analyses reveal that complexes 1 and 2 are iso-morphous, they possess the 4~3·6~3 topology assembled by Gd~(3+)/Eu~(3+) and two different multidentate carboxylate ligands. Magnetic measurements show that antiferromagnetic coupling exists between adjacent Gd~(3+) ions in complex 1. The complex 2 exhibits the corresponding characteristic luminescence in the visible region under an excitation at 305 nm.
GST Fusion Protein Based Specific Polyclonal Antibody Preparation of Mouse Aquaporin 1

Aquaporins(AQPs)are specific membrane channels for water and other small nonionic molecules.In order to overcome the difficulties to generate the effictive antibody of membrane protein,we selected the cytoplasmic C-terminus of Aquaporin 1(AQP1)as an unique antigen.The long C-terminus of mouse AQP1 was overexpressed in the Glutathione S-tansferase Gene Fusion System.On the basis of the resonable amounts of soluable membrane protein peptides,we prepared the specific antibody.To pursure this object,we constructed pGEX-4T-1/mAQP1(DNA sequence from 700 to 801 bp)recombinant plasmid and transformed it into Escherichia coli BL21 cells.The GST-AQP1 C-terminal hydrophilic peptide fusion protein was induced by IPTG and further purified by Glutathione Sepharose 4B to obtain the right size fusion protein.Then we immunized the New Zealand rabbits to prepare the antiserum.The purified AQP1 antibody showed high sensitivity by ELISA assay and high specificity by Western blot with AQPI null mice served as negative control.Finally,we also checked the AQP1 localization in the mouse renal tissues in wild type of mice and AQP1 null mice served as negative control.We demonstrated that AQP1 was highly expressed at the descending limb of Henle tube using our purified AQP1 antibody,which was consistent with previous report.The successful design and preparation of AQP1 antibody through GST technique is an example as making antibodies against a specific membrane protein.
Synthesis and Antiproliferative Activity of Novel [1,2,4]Triazolo[1,5-a]pyrimidine-7-amine Derivatives

A series of novel N-anilino-2-substituted-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidine-7-amine derivatives was prepared and evaluated for their in vitro antiproliferative activity against two cancer eell lines.Bel-7402 and HT-1080.Most of the compounds inhibited the cell proliferation at a low concentration.Seven compounds,VI_5,VI_7,VI_(10),and VI_(12)-VI_(15),possessed marked antiproliferative activity superior to that of cisplatin.of these seven initial hits,compound Vl_(10) was the most active.
Synthesis and Catalytic Properties of ZSM-5 Zeolite with Alkyl-polyamine Triethylene-tetramine as Directing Agent

With alkyl-polyamine triethylene-tetramine as the structure-directing agent, aluminosilicate zeolite ZSM-5(MFI) crystals were synthesized and characterized by XRD, SEM, FTIR, and TG-DTA. The results indicate that the organic amine has a certain influence on the crystal shape and size. The alkaline condition was in favor of the crystallization of ZSM-5 zeolite in the triethylene-tetramine system. The catalytic activity of as-synthesized crystals was examined for the aqueous hydroxylation of phenol with hydrogen peroxide. The phenol conversion was 13.6%, and the selectivities of the as-synthesized samples for catechol, hydroquinone, and benzoquinone were 66.0%, 23.6%, and 10.4%, respectively. The as-synthesized ZSM-5 sample shows a relatively high selectivity towards catechol and could be a promising catalyst.
Interaction Between Mitoxantrone Metal Complex and Titan Yellow by Resonance Rayleigh Scattering Spectra and Its Analytical Application

In a pH 2.4 Britton-Robinson buffer medium, the anthracycline antibiotics mitoxantrone(MXT) could react with metal ions such as Pd(Ⅱ), Co(Ⅱ) and Cu(Ⅱ) to form l:2(molar ratio) cationic chelates, which further reacted with the anionic dye titan yellow to form 1:2 ternary ion-association complexes by electrostatic interaction. As a result, the intensity of resonance Rayleigh scattering(RRS) was enhanced greatly. These RRS spectral characteristics of various metal ion systems were similar, and the maximum RRS wavelengths were all located at 454 nm. But the increments of RRS intensities were different in the series of Pd(Ⅱ)>Co(Ⅱ)>Cu(Ⅱ). The enhanced RRS intensities were proportional to the concentration of MXT in a range of 0.03-2.4 μg/mL and the detection limit(3σ) was 0.009 μg/mL for the Pd(Ⅱ) system. In this study, the optimum conditions of the reactions and the effects of foreign substances were investigated, in addition, the composition and reaction mechanism of ion-association complexes were discussed. Thus a highly sensitive, simple and rapid method is proposed for the determination of MXT in urine and serum samples.
新农村建设中的村镇规划研究进展

介绍了我国村镇规划的意义及村镇规划的起始阶段研究,从发达国家村镇规划的成功经验中提炼出值得我国村镇规划借鉴的措施,并有针对性的对我国今后村镇规划发展提出了关键性的技术问题.
不同春化天数对荷兰豆种子发芽过程中内含物含量的影响

将荷兰豆种子置于3℃下春化处理5、10、15 d后,从形态和生理角度对荷兰豆感受低温的特性进行了鉴定,研究了春化处理时间长短对荷兰豆种子发芽过程中内含物含量的影响.结果表明:春化处理10 d的荷兰豆种子发芽率、发芽势、活力指数等指标均显著高于未春化处理及春化处理5 d和15 d的种子;种子的α-淀粉酶活性在春化处理10 d时达到最大值,其次为春化处理15 d,未春化处理种子的α-淀粉酶活性最低;种子的β-淀粉酶活性与α-淀粉酶活性的变化趋势一致,但变化幅度较小;幼苗中的可溶性糖和可溶性蛋白含量均表现为春化处理10 d的荷兰豆种子最小.综合分析结果表明,荷兰豆种子在3℃条件下最适宜的春化处理时间为10 d.
怀集县花生良种高产示范及栽培技术

怀集县是广东省花生主产区之一.近年来引进推广了高油高产、抗青枯病的花生新品种仲恺花1号,经市级验收,示范区春植平均每667 m~2产量230.23 kg,比非示范区增产43.58%,秋植平均每667 m~2产量225.00kg,比非示范区增产26.76%,取得良好的增产增收效益.结合本地实际,栽培上要抓好合理轮作、科学施肥、适时播种、加强除草和防控病虫等技术措施.
水杨酸对水稻种子活力及抗盐性的影响

以水稻种子为试材,采用水杨酸浸种后,测定种子电解质外渗液的电导率和幼苗的形态指标,研究了水杨酸对水稻种子活力及抗盐性的影响.结果表明.水杨酸能有效保护水稻种子萌发过程中细胞膜的完整性,并可增强水稻种子在NaCl胁迫下的活力.
子宫肌瘤剔除三种术式的临床比较

目的 比较经腹,经阴道和腹腔镜下3种子宫肌瘤剔除术的特点,指导临床术式的选择.方法 回顾性分析2006年1月至2008年3月间我院经腹子宫肌瘤剔除术84例(开腹组)、腹腔镜下子宫肌瘤剔除术78例(腹腔镜组)和阴道子宫肌瘤剔除术60例(阴道组)的临床资料,比较手术效果和术后恢复情况.结果 阴式组手术时间最短(59.58±27.72)min,开腹组(98.93±33.07)min,腹腔镜组(114.62±33.12)min,3组比较差异有显著性(P<0.05).术中出血量阴式组最少(100±87.04)ml,腹腔镜组(142.31±140.42)ml与开腹组(144.29±131.68)ml无明显差异.术后阴式组患者的排气时间(29.5±7.86)h,住院时间(5.75±1.1)d;腹腔镜组(37.23±9.69)h住院时间(6.62±1.4)d;开腹组(45±13.88)b住院时间(7.12±1.46)d,3组比较有统计学差异(P<0.05).开腹组剔除的肌瘤瘤体直径最大(P<0.05),腹腔镜组与阴式组则无统计学差异(P>0.05).结论 阴式子宫肌瘤剔除术与腹腔镜子宫肌瘤剔除术手术效果好,具有创伤小,恢复快的优点.而腹式子宫肌瘤剔除术的适应症更广泛.3种手术各有其特点和适应症.不能完全相互代替.
LIU TUNGSHENG'S PALAEOMAGNETIC LOESS RESEARCH IN SWITZERLAND

The beginning of palaeomagnetic research on Chinese loess in ZürichA rainy day in spring 1981 saw the opening up of a new avenue of research activity in the palaeomagnetic laboratory at ETH Zürich. Unexpectedly and without advance notice an elderly Chinese man presented himself at the door of our laboratory which is hidden in the wooded outskirts of Zürich. He had with him two heavy parcels-packed full with what turned out to be a huge number of large loess samples. With a friendly smile he introduced himself, entered the laboratory, and asked for scientific collaboration.
回盲部肿块的超声诊断和鉴别34例

临床资料收集1998-10/2008-10住院并经超声检查和手术的患者34(男23,女性11)例,平均年龄48(30～75)岁.术后均经病理检查.方法:使用GE-Lg 7 Pro型彩色超声诊断仪,探头频率3.5～7.5 MHz.
心脏标志物联合检测在新生儿缺氧缺血性心肌损伤诊断中的应用

引言新生儿窒息所引起的低氧血症、高碳酸血症和酸中毒可导致机体多器官功能损害，心脏是受损害的器官之一．新生儿心肌损伤(hypoxic-ischemic myocardial injury，HIM)因其症状隐匿、临床表现不典型，易被忽略．
微晶纤维素的含量测定

目的 探讨微晶纤维素的含量测定方法.方法 自拟方法:以工作基准试剂草酸钠标定硫酸铈滴定液,以硫酸铈滴定液标定硫酸亚铁铵滴定液,再用硫酸亚铁铵滴定液对微晶纤维素中纤维素含量测定方法进行研究;药典方法:依据<中国药典>2005年版以三氧化二砷标定硫酸铈滴定液,以硫酸铈滴定液标定硫酸亚铁铵滴定液,再用硫酸亚铁铵滴定液对微晶纤维索中纤维素含量测定方法.结果 自拟方法与药典方法对微晶纤维素中纤维素含量测定方法进行研究相比较,其RSD 0.05%.结论 自拟方法与药典方法比较,自拟方法可靠,值得推广.
Application of Adaptive Divided Difference Filter on GPS/IMU Integrated Navigation System

The efficient and accurate approximate nonlinear filters have been widely used in the estimation of states and parameters of dynamical systems.In this paper,an adaptive divided difference filter is designed for precise estimation of states and parameters of mieromechanical gyro navigation system.Based on the investigation of nonlinear divided difference filter the adaptive divided difference filter(ADDF)was designed,which takes account of the incorrect time-varying noise statistics of dynamical systems and compensation of the nonlinearity effects neglected by linearization.And its performance is superior to that of DDF and extended Kalman filter (EKF). Simulation results indicate that the advantages of the proposed nonlinear filters make them attractive alternatives to the extended Kalman filter.