mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Special Xenoliths in an Aegirine-Augite Syenite Porphyry in Liuhe, Yunnan, China: Discovery and Implications

Three special types of xenoliths have recently been found in an aegirine-augite syenite porphyry in Liuhe, Yunnan, China. Petrographical,petrochemical, electron microprobe, and scanning electron microscopy studies indicate that pure calcite xenocrysts and quartz-bearing topaz pegmatite xenoliths result from the degassing of mantle fluids during their migration, and that black microcrystalline iron-rich silicate-melt xenoliths are the product of the extraction of mantle fluids accompanying degassing and are composed dominantly of quartz, chlorite, and iron-rich columnar and sheet silicate minerals with characteristic minerals, such as native iron, apatite, and zircon. According to the bulk-rock chemical and mineral compositions and crystallization states, the microcrystalline melt xenoliths are not the product of conventional magmatism, and especially the existence of native iron further proves that the xenoliths were mantle fluid materials under reduction or anoxic conditions. The study of the special xenoliths furnishes an important deep-process geochemical background of polymetalUc mineralization in different rocks and strata in the study area.
Basic Types and Structural Characteristics of Uplifts: An Overview of Sedimentary Basins in China

The uplift is a positive structural unit of the crust. It is an important window for continental dynamics owing to its abundant structural phenomena, such as fault, fold, unconformity and denudation of strata. Meanwhile, it is the very place to store important minerals like oil, natural gas, coal and uranium. Giant and large-scale oil and gas fields in China, such as the Daqing Oilfield, Lunnan-Tahe Oilfield, Penglai 19-3 Oilfield, Puguang Gas Field and Jingbian Gas Field, are developed mainly on uplifts. Therefore, it is the main target both for oil and gas exploration and for geological study. The uplift can be either a basement uplift, or one developed only in the sedimentary cover. Extension, compression and wrench or their combined forces may give rise to uplifts. The development process of uplifting, such as formation, development, dwindling and destruction, can be taken as the uplifting cycle. The uplifts on the giant Precambrian cratons are large in scale with less extensive structural deformation. The uplifts on the medium- and small-sized cratons or neo-cratons are formed in various shapes with strong structural deformation and complicated geological structure. Owing to changes in the geodynamic environment, uplift experiences a multi-stage or multi-cycle development process. Its geological structure is characterized in superposition of multi-structural layers. Based on the basement properties, mechanical stratigraphy and development sequence, uplifts can be divided into three basic types--the succession, superposition and destruction ones. The succession type is subdivided into the maintaining type and the lasting type. The superposition type can he subdivided into the composite anticlinal type, the buried-hill draped type, the faulted uplift type and the migration type according to the different scales and superimposed styles of uplifts in different cycles. The destruction type is subdivided into the tilting type and the negative inverted type. The development history of uplifts and their controlling effects on sedimentation and fluids are quite different from one another, although the uplifts with different structural types store important minerals. Uplifts and their slopes are the main areas for oil and gas accumulation. They usually become the composite oil and gas accumulation zones (belts) with multiple productive formations and various types of oil and gas reservoirs.
Carbon and Oxygen Isotopic Composition of Surface-Sediment Carbonate in Bosten Lake (Xinjiang, China) and its Controlling Factors

Bosten Lake is a mid-latitude lake with water mainly supplied by melting ice and snow in the Tianshan Mountains. The depositional environment of the lake is spatially not uniform due to the proximity of the major inlet and the single outlet in the western part of the lake. The analytical results show that the carbon and oxygen isotopic composition of recent lake sediments is related to this specific lacustrine depositional environment and to the resulting carbonate mineralogy. In the southwestern lake region between the Kaidu River inlet and the Kongqi River outlet, carbon isotope composition (δ~(13)C) values of the carbonate sediment (-1‰ to -2‰) have no relation to the oxygen isotope composition of the carbonate (δ~(18)O) values (-7‰ to -8‰), with both isotopes showing a low variability. The carbonate content is low (<20%). Carbonate minerals analyzed by X-ray diffraction are mainly composed of calcite, while aragonite was not recorded. The salinity of the lake water is low in the estuary region as a result of the Kaidu River inflow. In comparison, the carbon and oxygen isotope values are higher in the middle and eastern parts of the lake, with δ~(13)C values between approximately +0.5‰ and +3‰, and δ~(18)O values between -1‰ and -5‰. There is a moderate correlation between the stable oxygen and carbon isotopes, with a coefficient of correlation r of approximately 0.63. This implies that the lake water has a relatively short residence time. Carbonate minerals constitute calcite and aragonite in the middle and eastern region of the lake. Aragonite and Mg-calcite are formed at higher lake water salinity and temperatures, and larger evaporation effects. More saline lake water in the middle and eastern region of the lake and the enhanced isotopic equilibrium between water and atmospheric CO_2 cause the correlating carbon and oxygen isotope values determined for aragonite and Mg-calcite. Evaporation and biological processes are the main reasons for the salinity and carbonate mineralogy influence of the surface-sediment carbonate in Bosten Lake. The lake water residence time and the CO_2 exchange between the atmosphere and the water body control the carbon and oxygen isotope composition of the carbonate sediment. In addition, organic matter pollution and decomposition result in the abnormally low carbon isotope values of the lake surface-sediment carbonate.
A New Species of Gobiconodon (Mammalia) from Western Liaoning, China and its Implication for the Dental Formula of Gobiconodon

A new species of Gobiconodon from the Early Cretaceous in the Lujiatun locality of western Liaoning is erected based on an almost complete skull and lower jaw. It has a flatten skull roof, the lambdoidal crest is strongly curved forward, and the sagittal crest is short and low. There is a protuberance near the anterior base of the zygoma. The preservation of the upper teeth is very rare in all known Gobiconodon, and this provides important information for the study on the formula of Gobiconodon. The new species is the fifth primitive mammal unearthed from the Lujiatun locality, and is of great value for the study of the geological age of the stratigraphy at Lujiatun by primitive mammal material.
Chronology and Geochemistry of Mesozoic Volcanic Rocks in the Linjiang Area, Jilin Province and their Tectonic Implications

Zircon U-Pb ages and geochemical analytical results are presented for the volcanic rocks of the Naozhigou, Ergulazi, and Sidaogou Formations in the Linjiang area, southeastern Jilin Province to constrain the nature of magma source and their tectonic settings. The Naozhigou Formation is composed mainly of andesite and rhyolite and its weighted mean ~(206)Pb/~(238)U age for 13 zircon grains is 222±1 Ma. The Ergulazi Formation consists of basaltic andesite, basaltic trachyandesite, and andesite, and six grains give a weighted mean ~(206)Pb/~(238)U age of 131±4 Ma. The Sidaogou Formation consists mainly of trachyandesite and rhyolite, and six zircon grains yield a weighted mean ~(206)Pb/~(238)U age of 113±4 Ma. The volcanic rocks have SiO_2=60.24%-77.46%, MgO=0.36%-1.29% (Mg~#=0.32-0.40) for the Naozhigou Formation, SiO_2=51.60%-59.32 %, MgO=3.70 %-5.54% (Mg~#=0.50-0.60) for the Ergulazi Formation, and SiO2=58.28%-76.32%, MgO=0.07%-1.20% (Mg#=0.14-0.46) for the Sidaogou Formation. The trace element analytical results indicate that these volcanic rocks are characterized by enrichment in light rare earth elements (LREEs) and large ion lithophile elements (LILEs), relative depletion in heavy rare earth elements (HREEs) and high field strength elements (HFSEs, Nb, Ta, and Ti), and negative Eu anomalies. Compared with the primitive mantle, the Mesozoic volcanic rocks in the Linjiang area have relatively high initial ~(87)Sr/~(86)Sr ratios (0.7053-0.7083) and low ε_(Nd)(t) values (-8.38 to -2.43), and display an EMII trend. The late Triassic magma for the Naozhigou Formation could be derived from partial melting of a newly accretional crust with the minor involvement of the North China Craton basement and formed under an extensional environment after the collision of the Yangtze Craton and the North China Craton. The Early Cretaceous volcanic rocks for the Ergulazi and Sidaogou Formations could be formed under the tectonic setting of an active continental margin related to the westward snbduction of the Izanagi plate.
莫沙必利联合氟哌噻吨美利曲辛治疗功能性消化不良的临床研究

目的 观察莫沙必利联合氟哌噻吨美利曲辛治疗功能性消化不良的疗效和安全性.方法 将92例功能性消化不良患者随机分为治疗组和对照组,各46例.两组均给予莫沙必利5 mg/次,3次,d,口服;治疗组在此基础上加用氟哌噻吨美利曲辛2片/d,早晨及中午各服1片,疗程均为4周.结果 治疗组显效率(71.7%)和总有效率(91.3%)均优于对照组(分别为47.8%和71.7%)(P<0.05).治疗组在治疗后的Hamilton抑郁量表和焦虑量表评分均显著低于对照组(P<0.001).治疗组在治疗后3月的复发率(13.0%)也低于对照组(32.6%)(P<0.05).两组均未见明显副作用.结论 莫沙必利联合氟哌噻吨美利曲辛治疗功能性消化不良的疗效优于单用莫沙必利.
肝癌三维适形放疗后放射性肝损伤的MRI随访观察

目的 此研究是通过MRI随访观察肝癌三维适形放疗之后的放射性肝损伤的表现.方法 52例原发性肝癌的患者,实施了三维适形放射治疗,累计剂量:42～60Gy(52.00±7.07Gy),照射区定义为50%等剂量曲线分布范围.其中32例在放疗后3～15周,20例在放疗后4～36个月行MRI扫描.扫描包括平扫T_1WI、T_2WI及动态增强扫描,观察放射性肝损伤的表现.结果 放疗后3周～15周MRI扫描见局限性放射性损伤区域,平扫:T_1WI呈低信号(n=28)或者等信号(n=4),T_2WI呈等信号(n=12)或者轻度高信号(n=20).增强扫描表现为轻度增强或者明显增强(n=25)及无明显强化(n=7).放疗后4～36个月复查平扫时在T_1WI呈低信号(n=20),T_2WI呈等信号(n=2)或者高信号(n=18),内可见增粗的肝动脉(n=5)及肝裂隙(n=2).9例患者MRI随访观察发现,放射损伤区域体积逐渐缩小,在动态MRI扫描发现在动脉相信号轻度增强或者不增强,静脉相信号明显增强,延迟相仍呈高信号或者信号轻度衰减,增强强度高于早期(P<0.05).2例患者放疗后复发,MRI扫描发现:复发肿瘤平扫时与放射性损伤区域难以鉴别,增强扫描动脉期强化,静脉期迅速廓清,呈现"快进快出"现象.而放射损伤区域增强扫描后在动脉期轻度增强,静脉期明显增强.结论 MRI可用来观察放射性肝损伤动态变化.
南方医科大学被批准为教育部第四批部级科技查新工作站

根据<教育部关于在东北师范大学等10所法人机构设立第四批教育部级科技查新工作站的通知>(教技发函[2009]3号),教育部批准南方医科大学为第四批教育部部级科技查新工作站,并于2009年3月16日在深圳大学城图书馆举行授牌仪式.
三维适形放疗同步化疗治疗直肠癌术后局部复发的临床观察

目的 观察三维适形放疗同步应用奥沙利铂(L-OHP)联合5-氟尿嘧啶(5-Fu)/亚叶酸钙(LV)治疗直肠癌术后局部复发患者的疗效及毒副作用.方法 40例术后局部复发直肠癌患者,在三维适形放疗的同期应用L-OHP联合5-Fu/LV治疗3～6个周期:全盆腔三野同中心放射治疗50 Gy,针对局部肿瘤病灶予3DCRT加量至60～65 Gy;化疗方案为L-OHP 130 mg/m~2,第1天,同时或之后予LV 200 mg/m~2,第1,2天;5-Fu 400 mg/m~2,静脉推注,600 mg/m~2持续静脉滴注22h,第1,2天.每21 d为1个周期,共3～6个周期.结果 1、2、3年生存率分别为82.5%、59%、38%;1、2、3年局部控制率分别为63%、51%、46%,同时其治疗相关不良反应有所增加,但大部分为1、2级,未见4级治疗不良反应发生.治疗失败的原因为肿瘤远处转移及局部复发.结论 三维适形放疗同步应用L-OHP联合5-Fu/LV治疗直肠癌术后复发安全、有效,可作为优选治疗方案.
ABS-ELISA检测46例结直肠癌患者血清可溶性CD137L浓度

目的 建立一种灵敏、可靠的检测血清可溶性CD137L(sCD137L)浓度的方法. 方法建立链霉亲和素-生物素-ELISA检测27例结肠癌患者、19例直肠癌患者以及15例健康对照者血清sCD137L水平. 结果 46例结直肠癌患者血清sCD137L的平均浓度为(1091.48±519.32)pg/ml,显著高于健康对照组[(4.36±2.94)pg/ml](P<0.01).结论 结直肠癌患者血清sCD137L水平显著升高,血清sCD137L浓度在结直肠癌的诊断及疗效评估、预后判断中可能具有一定的临床价值.
感应加热电源对电网进线产生的畸变影响

@@ 1 介绍 在感应加热或感应融化中,固态电源是将工频(50或60 Hz)和恒定的电压转换为线圈中的中频或高频(100～10000 Hz)电流和电压.近年来,在铸造行业,一些客户现场单机功率已达5万千瓦,实际上感应加热设备制造商还可以做更大的设备.
遨游环宇 光耀苍穹——"刘东生星"的故事

@@ 1997年10月8日, 农历九月初七,天气晴朗.傍晚,皎洁的上弦月已高挂在座落于河北燕山山脉深处、中国科学院国家天文台兴隆观测站内的西南方天空,大视场多色巡天科研团队的工作人员做好了施密特望远镜观测的前期准备工作.
影响老年髋部骨折患者手术安全性的相关因素分析

0 引言 老年人对手术耐受性较差,术中、术后容易发生严重并发症,所以老年髋部骨折患者手术风险较高.我们对自2000-10/2008-10治疗并获随访的60岁以上髋部骨折患者143例进行研究,探讨影响老年髋部骨折患者手术安全性的相关因素.
耳内镜下外伤性鼓膜穿孔修补术39例

1 临床资料 2003/2006我科在耳内镜下用自体筋膜或脂肪内植法治疗外伤性鼓膜穿孔39(男15,女24)例,年龄11～63(平均32)岁.
婴幼儿泌尿系结石6例治疗临床报道

1 临床资料 2008-07/09我院收住了泌尿系结石婴幼儿6(男4,女2)例,年龄5-21(平均12±5.66)mo.主要症状为少尿、无尿或排尿困难,伴低热、恶心、呕吐和哭闹.查体部分患儿肺底有细小湿啰音,下肢均有不同程度水肿.询问病史所有患儿均系人工喂养.
量身定做下颌骨

大家都知道,如果没有地基,大楼无法建成,如果没有土壤,树木不能生长,但如果没有骨头,还可以种牙吗?答案是肯定的,可以种!不过这个拥有第三副牙齿的过程有一个专门的名称,叫做下颌骨缺损的功能性修复.下颌骨缺损是怎么造成的?当颌面部发生严重的外伤,如交通事故、工作中的意外或颌面部肿瘤切除时,下颌骨的一部分被摘除,失去连续性,形成下颌骨缺损.
化脓性角膜炎241例临床分析

目的 分析化脓性角膜炎病因、病原、临床特点及预后.方法 对1999年1月至2008年8月在本科住院治疗、诊断明确的241例化脓性角膜炎患者进行回顾性分析.结果 外伤是最主要的危险因素(39.4%),病原检出阳性率为46.7%,其中细菌占30.2%,真菌占12.3%,混合感染4.2%.在前房积脓和角膜穿孔的病例中,检出的病原以真菌居多,病灶直径>6 mm或前房积脓>1 mm的病例预后差.246眼中手术治疗66眼,非手术治疗148眼,眼球摘除术32眼,出院时治愈151眼.结论 化脓性角膜炎是危害极大的致盲性眼病,细菌仍是主要致病菌,其预后与临床体征及病原种类有关,及早诊治和手术干预仍是挽救眼球的有力措施.
重视泌尿男生殖系肿瘤的基础与临床研究

@@ 肿瘤已成为人类的主要死亡原因之一.随着人们生活水平的提高、生活方式的改变、老龄人口比例的升高,泌尿肿瘤的发病呈现出发病年龄年轻化、发病率快速上升的现象.
ZnO纳米柱的可控生长及其光学性质

以高分子聚合物聚乙烯醇(PVA)为软模板,通过PVA与乙酸锌(Zn(CH_3COO)_2·2H_2O)之间发生的离子络合反应,在PVA亚浓溶液所提供的空间位阻力作用下,经过烧结,获得了直径在15～50 nm之间的呈放射状簇形排列的ZnO纳米柱.X射线衍射(XRD)表明,所得产物结晶良好,呈六方纤锌矿晶体结构.利用扫描电镜(SEM)和透射电镜(TEM)分析了不同热处理温度对产物形貌的影响,结果显示,随温度从400℃增加到700℃,ZnO纳米柱生长趋势总体趋于明显,同时产物形貌的规整性也明显变好.采用室温下光致发光(PL)光谱对制得的ZnO纳米柱的光学性能研究表明,随着温度升高,ZNO发光性能在逐渐改善,除在384nm处出现了较常见的紫外发射外,PL光谱曲线在354 nm处还出现了少见报道的较强的紫外发射峰,显示出良好的紫外发光性能.
前驱体中Bi含量对Bi_(3.4)Ce_(0.6)Ti_3O_(12)薄膜结构和性能的影响

分别配制了Bi含量为90,100和110 mole%的前驱体,在Pt/Ti/SiO_2/Si衬底上制备Bi_(3.4)Ce_(0.6)Ti_3O_(12)薄膜,研究前驱体中Bi含量对其微观结构和铁电性能的影响.前驱体中Bi含量增加可以有效地改善薄膜的结晶性能和表面形貌.对Pt/Bi_(3.4)Ce_(0.6)Ti_3O_(12)/Pt电容结构进行电学性能测量,发现Bi过量10%的前驱体制备的Bi_(3.4)Ce_(0.6)Ti_3O_(12)薄膜具有较好的性能:室温下,在测试频率1 kHz时,其介电常数为172,介电损耗为0.033;在测试电场为600kV/cm时,其剩余极化值(2Pr)和矫顽电场(2Ec)分别达到67.1μC/cm~2和299.7 kV/cm;同时还表现出良好的抗疲劳特性和绝缘性能.
稀土掺杂的高电压梯度ZnO压敏电阻

采用稀土氧化物掺杂改进ZnO压敏电阻的电气参数和结构参数,并解释了稀土掺杂改性的机理.高温烧结时稀土氧化物与Bi,Zn,Mn,Sb等生成新的尖晶石,由于尖晶石的钉扎效应而降低氧化锌晶粒的生长速度,导致压敏电阻的晶粒尺寸减小、电压梯度明显增加.通过添加Co和Mn的氧化物,能有效降低ZnO压敏电阻的泄露电流和增加其非线性系数.试制的压敏电阻样品的电压梯度达492V/mm,非线性系数达76,而泄露电流只有1 μA.
青藏铁路主动冷却路基的工程效果

在全球变暖的背景下,高温冻土区的建筑必须改变单纯依靠热阻(增加路堤高度、采用保温材料)的消极"保"温方法,而采用"冷却路基"的积极"降"温措施.通过局地因素对多年冻土分布影响的分析得到如下启示:可以通过改变路基的结构和填料调控传热,以达到冷却路基的目的.青藏铁路的实践表明:通过遮阳板调控辐射,通过块石层、通风管、热管调控对流,通过"热半导体"材料调控传导,通过这些调控方式的组合,均可有效地降低路基下多年冻土的地温,保证路基的稳定.冷却路基方法是高温冻土区工程建筑应对全球转暖的有效措施.
做好草原大文章是时代赋予的使命

 1 做好草原大文章的提出2008年8月20～22日,农业部部长孙政才在内蒙古就农牧业发展、草原保护与建设等问题进行调研时强调指出,我国草原面积多达60亿亩(4亿hm~2),是我国面积最大的绿色生态屏障,是牧区畜牧业发展和农牧民生存发展的基本生活资料,加强草原保护与建设关系国家生态、农牧业生产、农牧民生活,意义重大、任务繁重、要求紧迫,各级农牧部门、广大草原牧区一定要全面落实党在牧区的基本政策,充分调动农牧民保护建设草原的积极性和创造性,认真实行草原保护建设各项制度,加强重点工程建设,正确处理好生态、生产和生活之间的关系,努力促进草原"绿起来"、草原畜牧业"强起来"、农牧民"富起来",切实做好草原保护与建设这篇大文章.
2008年心血管疾病药物治疗学进展荟萃

2008年心血管疾病药物治疗学研究收获颇丰.伴随着一系列心血管系统及相关疾病的大型临床试验的揭晓,为本领域注入了大量新观念.值得注意的是,本年度数项最受关注的临床研究得出了阴性甚至不利的结果,对心血管疾病药物治疗的传统理念形成了巨大冲击.
双歧杆菌与龋病发生的关系

龋病是危害人类尤其是儿童最为常见的口腔疾病,早期儿童龋齿(early childhood caries, ECC)的发生不仅影响儿童咀嚼食物,引起儿童牙髓病和根尖周病的发生,还可进一步影响儿童全身的生长发育,严重的ECC还可影响儿童生理和心理健康及其生活质量;
李应东教授论治心脏神经官能症经验

随着社会经济的发展、竞争压力的增加、生活节奏的改变,心脏神经官能症的发病率呈逐年上升趋势.由于该病病因复杂,西医治疗一般以对症处理为主,疗效不佳;中医注重从整体出发,标本兼治,日渐显示出其优势.李应东教授从医20多年对本病的治疗独有神悟,造诣颇深.文章对李老师论治心脏神经官能症之经验进行了简要总结,以供基础与临床研究者参考.
急性分泌性中耳炎的中医药规范化治疗

目的 观察中医药规范化治疗急性分泌性中耳炎的临床疗效.方法将门诊的急性分泌性中耳炎患者随机分为治疗组和对照组,每组50例,治疗组给予中医药规范化治疗,对照组给予抗生素口服,同时配合鼻腔喷药.结果一个疗程治愈好转率,治疗组为96%,对照组为84%.经统计学处理,两组总有效率差异有统计学意义.结论中医药规范化治疗急性分泌性中耳炎疗效更好.
中医儿科病情观察特点及临床运用原则

该文结合小儿生理病理及病症特点,分析了儿科病情观察的特殊性,提出了符合儿科特点的中医病情观察原则,认为运用中医基本理论和现代科学技术,把握中医儿科病情观察的要点和方法,是准确获得临床辨证施护第一手材料的重要保证,有利于提高儿科临床护理质量.
Competitive and cooperative adsorption of arsenate and citrate on goethite

The fate of arsenic in natural environments is influenced by adsorption onto metal (hydr)oxides. The extent of arsenic adsorption is strongly affected by coexisting dissolved natural organic acids. Recently, some studies reported that there existed competitive adsorption between arsenate and citrate on goethite. Humic acid is known to interact strongly with arsenate by forming complexes in aqueous solution, hence it is necessary to undertake a comprehensive study of the adsorption of arsenate/citrate onto goethite in the presence of one another. The results showed that at the arsenate concentrations used in this study (0.006-0.27 mmol/L), citrate decreased arsenate adsorption at acidic pH but no effect was observed at alkaline pH. In comparison, citrate adsorption was inhibited at acidic pH, but enhanced at alkaline pH by arsenate. This was probably due to the formation of complex between arsenate and citrate like the case of arsenate with humic acid. These results implied that the mechanism of the adsorption of arsenate and citrate onto goethite in the presence of one another involved not only competition for binding sites, but the cooperation between the two species at the water-goethite interface as well.
光伏电池组件专用材料新进展

美国加州BioSo1ar公司2007年9月中旬宣布,成功推出其低成本的生物塑料底板太阳能电池,由可再生植物资源生产的生物塑料材料可降低太阳能电池的成本.BioSOlar 公司的技术团队通过研发生产的生物塑料薄膜可替代现用太阳能模块底板.该底板可用作太阳能电池或太阿1能电池模块的底层,支撑太阳能电池的排布和其不同的层面.用于太阳能电池需有耐候性,并符合严格的加工和设置要求.
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编者按:<贵州农业科学>2008年底进入了<中文核心期刊要目总览>,2009年改为月刊.为了进一步提高<贵州农业科学>的办刊质量和编辑水平,提高来稿的质量,结合国家对科技期刊论文编排要求和本刊的特点,特将本刊的编辑排版格式规范要求与范例全文发表在第4期和第5期(连载)上,以便读者、作者和编者充分了解并参照执行.
贵阳地区洋桔梗栽培及管理技术

洋桔梗(Eustoma russellianum)又名土耳其桔梗、草原龙胆,为龙胆科草原龙胆属植物,原产美国德克萨斯州.目前栽培品种已达数百种之多,尤以日本为盛,有逐渐替代香石竹之势.
从"授人以鱼"到"授人以渔":循证医学革新传统医学实践模式

@@ 20世纪90年代以来,循证医学(EBM)浪潮席卷全球,英国《柳叶刀》(Lancet)把循证医学比作I临床科学的"人类基因组计划".正如抗生素的发现对医学的冲击一样,EBM正在彻底改变着沿袭千古的医学实践模式.EBM强调医生应在临床工作中不断地自我学习并完善如何应用临床依据及他人总结出来的事实依据.
关于电脑下乡推广的思考

电脑下乡对农村信息化建设具有积极意义,但在目前推广中存在着如何找到切入点进而打开局面的难题.通过分析认为,电脑下乡推广应重视农村"意见领袖"的作用,可考虑在乡镇一级建立一支电脑下乡"意见领袖"队伍.
广东基层农业技术推广体系的现状及对策研究——基于博罗县的调查实证

完善基层农业技术推广体系是加快推进现代农业的重要举措.本文通过对广东省博罗县县级及所辖镇和办事处的农业技术推广机构进行调查分析发现.基层农业技术推广机构存在技术推广经费投入严重不足:人员和岗位脱离;非专业技术人员过多,知识断层和知识老化问题严重;农技推广方式不能满足农民需要等问题.分析了产生这些问题的主要原因,提出了加强农业技术推广体系建设的对策建议.
广东区域农业特色产业现状分析及评价

根据自身资源优势、区位优势和经济优势,广东省的区域农业特色产业经过近lO年的发展.已经走出了一条规模化发展、标准化生产、产业化经营、现代化加工的区域农业特色产业发展之路.对广东区域特色农业产业培育现状进行分析,并根据区域不同,探讨广东省各地区特色农业产业发展的特点.
中山市农村集体建设用地流转收益分配的思考

流转收益的分配机制是农村集体建设用地流转中的核心问题,只有建立了合理的收益分配机制,才能最终达到规范土地流转、保护农民利益和促进农村经济发展的目的.根据广东省中山市的集体建设用地流转的收益分配现状,找出其存在的问题,并提出其相应的对策和建议.
冬春季茄果类蔬菜育苗关键技术

冬春季栽培茄果类蔬菜.科学育苗是重要环节.介绍了播种期和播种量的推算方法、苗床准备和消毒、种子处理、播种、苗期管理、壮苗标准及苗期病虫害防治方法.
硫酸法钛白粉生产废水处理工艺研究

采用硫酸法生产钛白粉会产生大量的酸性废水.这些废水对环境的污染相当大.简述了废水的水质,其中含有大量的废酸;分析了采用石灰石中和法处理废水的工艺及处理过程中的存在问题.
刺五加扦插繁殖技术研究

研究了不同IBA浓度、不同成熟度插条以及不同部位枝条对刺五加扦插生根效果的影响.结果表明:50、100、150 mg/L IBA溶液均有促进刺五加插条生根的效果,其中以100 mg/L IBA处理的效果最好;半木质化插条的扦插生根效果优于木质化捕条;以枝条基部作捅条的效果优于枝条顶部和中部.
农科院校在农业现代化中的作用分析

农科院校在推进农业现代化过程中具有重要的作用.通过立足我国农业现代化的研究现状,借鉴国外农科院校推进农业现代化发展的经验,探索我国农科院校促进农业现代化发展的模式和实践,提出发挥农科院校在农业现代化中作用的对策建议.
我国茶叶饮用的4个阶段及其特点

以不同历史时期人类利用茶叶的特点为主线,以历史资料考证的结果为依据,把人类利用茶叶的过程大致划分为"吃茶"、"喝茶"、"饮(品)茶"和"艺茶"4个阶段,并对各个阶段的饮用特点及饮用程式作了简要地阐述;指出人类最初利用茶叶的目的和方式是"食用"而不是"药用";同时对4个阶段的茶叶饮用的历史沿革、冲泡鉴赏技艺及其相互关系进行了比较系统而赋有新意的评述.
华南年度间气候变化对水稻食味品质的影响初探

采用<2005～2006年早造广东省常规水稻品种试验总结>两年两季一点的有关试验数据,分析了12个水稻品种年度间食味品质的变化.结果表明,由于主要受年度间气候变化所导致一切外部环境差异的影响.致使年度间水稻食味品质发生较大变化,变幅在0～20.00%之间,但不同品种间食味品质的稳定性存在较大差异,显示食昧的稳定性跟不同的基因型有关.通过筛选出的食味稳定性高或具优良食味的品种材料,可作为培育具有食味品质性状稳定性高且食味优良的水稻新品种的亲本资源.可促进水稻食味育种的发展.
抗病、早熟三系杂交稻新组合天优103特征特性及其制种技术

介绍了广东省金稻种业有限公司育成的三系杂交稻新组合天优103的特征特性.从准确安排父母本播差期、培育田间高产群体结构、适时赶粉、去杂保纯等方面介绍了其制种技术.
经消弧线圈接地系统的中电阻快速选线方法

分析了传统选线方法在谐振接地系统中应用时存在的缺点,针对系统间歇性短时接地故障,介绍了一种新的预投入并联中电阻的快速选线方法.该选线方法可以使用户提前预判单相接地故障的发生线路,并对真正发生接地故障时的选线提供重要依据.通过模拟试验确定了中电阻取值范围,验证了该选线方法的优越性.
500 kV输电线路风偏故障分析及对策

500 kV输电线路发生风偏闪络给系统的安全稳定运行带来了较大影响,文章通过对风偏闪络故障及事故的统计分析,找出发生的规律特点,分析暴露出的问题,提出了针对性的对策和措施,对降低线路风偏闪络故障及事故率、提高线路安全运行水平有一定意义.
结核性脑膜炎30例影像学和脑脊液分析

0 引言 结核性脑膜炎是由结核杆菌引起的脑膜非化脓性炎症,可在原发感染后,结核菌血行播散至脑膜和脑实质而发生,属肺结核的严重并发症.现对我院收治的30例结核性脑膜炎临床资料分析如下.
瑞芬太尼复合异丙酚静脉麻醉100例分析

1 临床资料 2006-01/2008-12选择ASAⅠ-Ⅱ级且需全身麻醉的择期手术患者100(男57,女43)例,年龄21～65岁,无肝肾功能障碍及心脑血管系统病史.患者分为2组.
肺心病Ⅱ型呼吸衰竭伴营养不良与中医分型相关性分析

1临床资料 收集我院ICU及呼吸科2004-05/2006-06住院患者100(男81,女19)例,平均年龄68.6(48～89)岁.筛选符合慢性肺源性心脏病伴Ⅱ型呼衰伴营养不良诊断标准[1-2],排除其他疾病(肺结核、2型糖尿病、肺部肿瘤、甲亢等消耗性疾病)所致体质量下降患者.
脂肪干细胞的研究及临床应用进展

0 引言再生医学的兴起激发了人们对各种干细胞、组织工程支架和细胞生长因子的研究热潮,选用合适的干细胞作为种子细胞的来源已成为研究的焦点.脂肪组织在人体内储量丰富,获取简便,通过抽脂从中获得的大量脂肪干细胞(adipose tissue-derived stem cells,ADSCs)不仅在体内体外具有多向分化潜能,在不同的诱导因子作用下可以向脂肪细胞、软骨细胞、肌细胞、成骨细胞、神经细胞、神经胶质细胞及胰岛细胞分化,而且可以分泌多种促血管生成因子和抗凋亡因子.
腺苷蛋氨酸用于治疗脂肪肝58例临床分析

0 引言近年来,脂肪肝(FL)的发病率已成为仅次于病毒性肝炎的第二大肝病,且常与肝纤维化,肝硬化先后发生或合并存在[1].我们采用腺苷蛋氨酸治疗FL取得了较好疗效,现报道如下.
先天性小肠系膜缺损致肠系膜裂孔疝1例

患者,女性,22岁,2009年3月9日因"停经26"周,腹痛伴呕吐15 h"入我院产科.既往无手术史.查体:下腹部町扪及增大的子宫,中腹部轻压痛,无反跳痛及肌紧张,移浊(-),肠鸣音1～2次/min.产科检查:宫底压痛明显,偶可扪及宫缩
吉西他滨联合顺铂方案治疗局部晚期非小细胞肺癌近期疗效观察

近年来,肺癌的发病率和病死率呈逐步上升趋势[1],其中80%为非小细胞肺癌(non-small cell lung cancer,NSCLC).大多数患者就诊时已丧失手术机会,化疗则在NSCLC的综合治疗中占据重要地位.
东准噶尔盆地东北缘发现氧化铁型铜-金(IOCG)矿床

1问题的提出老山口的地区位于阿尔泰山南部分和准噶尔盆地东缘北段的喀拉通克-卡拉先格尔成矿带的南段,是准噶尔盆北缘最重要的铁-铜-金矿化集中区.
《汶川地震专辑》出版说明

2008年5月12日14时28分(北京时间)我国四川省汶川地区发生了震惊世界的大地震,导致死亡和失踪约87000多人,直接经济损失约8450亿元,成为我国自1976年唐山地震(Ms7.8)以来损失最为惨重的一次破坏性地震.
常见假丝酵母菌耐药性分析

检测抗真菌药物耐药性,对于真菌感染治疗药物的选择、疗效观察以及预后均有重要意义.本文作者根据纸片扩散法抗真菌药物敏感性试验的标准,对2007--2008年临床标本分离的225株常见假丝酵母菌,做菌种鉴定和氟康唑药敏试验,现报道如下.
鼻中隔穿孔修复术术式比较

鼻中隔穿孔一般由鼻中隔矫正术后遗症、鼻中隔黏膜划痕术后遗症、矩状突凿除后遗症、萎缩性鼻炎、鼻中隔塑料物埋藏所致,或由鼻息肉术后并发症、鼻中隔冷冻治疗后遗症及外伤性穿孔所致.鼻中隔穿孔修复术的术野狭小,加上呼吸气流直接作用于手术创面,易影响手术操作和创面愈合.本院2000-2007年采用不同术式修复鼻中隔穿孔11例患者,效果良好,现报如下.
a new species (Musaceae) from Yunnan,China and taxonomic identity of Musa rubra

The center of diversity of the genus Musa (Musaceae) is in Southeast Asia, a region not studied in detail and where new species and varieties continue to be reported. A new wild banana species, M. chunii H(a)kkinen from Yunnan, China is described and illustrated based on observed morphological characteristics in the field. This extremely rare new species was only found in Tongbiguan Nature Reserve, Dehong District, West Yunnan. A key to M. chunii and related taxa is provided. In addition, critical notes regarding M. rubra Kurz identity are given.
(Inco) Projective Modules of Relatively Hereditary Torsion Theroy

In the paper, we define(inco) project modules of relatively hereditary torsion theory τ by intersection complement of module and study their properties; secondly, we define the(inco) τ-semisimple ring by(inco) τ-projective module and study their properties. When τ is a trivial torsion theory on R-rood, we prove that R is a semisimple ring if and only if R is a(inco) semisimple ring and satisfies(inco) condition.
全髋关节置换术后下肢深静脉血栓形成的预防护理进展

全髋关节置换术(total hip replacement,THR)因能有效缓解关节疼痛,改善关节功能,提高病人生活质量,已成为各种髋部疾患的终末治疗手段,但THR后下肢深静脉血栓形成(deep venous thrombosis,DVT)却成为临床上一项棘手问题,更为严重的是DVT是继发致死性肺血栓栓塞症(PTE)的基础病因.1999年吕厚山等~[1]首次报道我国THR后并发DVT的发生率为40%,2005年关振鹏等~[2]报道THR后并发DVT的发生率降至16.3%,而查振刚~[3]等报道其发生率为11.2%.随着对THR后DVT的深入研究,人们对其预防也有了一定的认识,现结合相关文献综述如下.
规范的质量过程管理在药物临床研究中的重要作用

加强新药研究过程中的监督与管理,使药物研究过程规范化,研究结果科学可靠,保证药物临床研究的质量,是药物临床研究人员的职责;而建立科学、规范的管理体系,是提高药物临床研究质量的关键.
AGS,SPS和RHIC三个能区中的π介子和质子的快度分布特性的研究

通过分析和比较AGS,SPS和RHIC三个能区中的π介子和质子的快度分布特性.研究高能重离子碰撞中多强子产生的核阻止和集体流特性.我们发现:在AGS和SPS能区,核阻止特性(用平均快度损失<δy>表示)随射弹快度log(yp)的增大呈线性增长关系,但是到达更高的能区RHIC能区,不再满足相同的线性变化关系,平均快度损失<δy>随能量变化呈饱和趋势;对于π介子分布,在AGS和SPS能区π介子在纵向表现为均匀分布特征,且纵向流速度随质心系能量√S呈对数线性增长关系,但是非均匀集体流理论不能解释RHIC能区的分布特性.
Effect of preparation methods on Pt/alumina catalysts for the hydrogen iodide catalytic decomposition

Three kinds of Pt/alumina catalysts were prepared by impregnation-hydrogen reduction, impregnation-hydrazine reduction and electroless plating methods. Their differences in the structures, specific areas and particle sizes were characterized by XRD, BET and TEM, respectively. Furthermore, their catalytic activities for the hydrogen iodide (HI) decomposition were evaluated in a fixed bed reactor. The results show that the catalyst 5%Pt/Al_2O_3 prepared by the electroless plating has the optimum catalytic properties for HI decomposition owing to the high dispersion of the platinum nano-particles (<5 nm) on the alumina supports.
佛手挥发油对支气管哮喘小鼠外周血、肺泡灌洗液及肺组织中嗜酸性粒细胞的影响

目的 观察支气管哮喘模型小鼠外周血、支气管肺泡灌洗液(BALF)及肺组织中嗜酸性粒细胞(EOS)的改变以及佛手挥发油对以上指标的影响.方法 C_(57),小鼠以卵白蛋白(OVA)致敏造成哮喘模型,分为模型组,对照药物组,佛手挥发油高、中、低3个剂量组,另外10只为健康对照组,分别检测各组小鼠外周血、BALF中EOS的水平并观察肺组织病理切片中EOS的浸润情况.结果 模型组外周血、BALF与对照组比较,EOS均明显增加(P<0.01);肺组织病理切片显示支气管及血管周围大量EOS浸润,各佛手挥发油组与模型组相比外周血BALF中EOS均有不同程度下降,高剂量组差异尤为显著(P<0.01),各组肺组织病理切片中EOS浸润较模型组减少,剂量越大此作用越明显.结论 佛手挥发油可抑制哮喘小鼠外周血、BALF中EOS水平,减少肺组织EOS浸润,拮抗气道炎症而发挥平喘作用,作用强度与剂量有关.
白藜芦醇对高脂饲养大鼠心肌组织PPAR γ mRNA表达的影响

白藜芦醇(resveratrol, RESV)是存在于葡萄籽、皮和红酒中的一类多酚类物质,有抗氧化、抗炎、心血管保护等作用.
Allowable Generalized Quantum Gates

In this paper,we give the most general duality gates,or generalized quantum gates in duality quantum computers.Here we show by explicit construction that a n-bit duality quantum computer with d slits can be simulated perfectly with an ordinary quantum computer with n qubits and one auxiliary qudit.Using this model,we give the most general form of duality gates which is of the form Σ_((i=0)) ~((d-1))piUi,and the Pi's are complex numbers with module less or equal to I and constrained by |Σ_ipi|≤1.