mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Gaseous Nitrogen Losses from Coastal Acid Sulfate Soils: A Short-Term Study

NO_x and N_2O emissions from coastal acid sulfate soils(CASS)cultivated for sugarcane production were investigated on the coastal lowlands of northern New South Wales,Australia.Two series of short-term measurements were made using chambers and micrometeorological techniques.Series 1 occurred during the wet season,the water-filled pore space(WFPS)was between 60%-80% and the site flooded during the measurements.Measurements were made directly after the harvest of soybean crop,which fixed an estimated 100 kg N ha~(-1),and the emission amounted to 3.2 kg NO_x-N ha~(-1)(12 d)and 1.8 kg N_2O-N ha~(-1)(5 d).Series 2 was made towards the end of the dry season when the WFPS was less than 60%.In Series 2,after an application of 50 kg N ha~(-1),emissions were markedly less,amounting to 0.9 kg N ha~(-1) over 10 d.During both series when the soil was moist,emissions of NOx were larger than those of N_2O.The emission of NO_x appeared to be haphazard,with little time dependence,but there was a clear diurnal cycle for N_2O,emphasising the need for continuous measurement procedures for both gases.These results suggest that agricultural production on CASS could be important sources of greenhouse gases and nitrogen practices will need to be optimised to reduce the offsite Effects of atmospheric warming,acidification or nitrification.Many questions still remain unanswered such as the emissions during the soybean bean filling stage and crop residue decomposition,the longer-term losses following the fertiliser application and emissions from CASS under different land uses
Effects of Bahia Grass Cover and Mulch on Runoff and Sediment Yield of Sloping Red Soil in Southern China

Rainfall,runoff(surface runoff,interflow and groundwater runoff)and soil loss from 5 m×15 m plots were recorded for 5 years (2001-2005)in an experiment with three treatments(cover,mulch and bare ground)on sloping red soil in southern China.Surface runoffand erosion from the Bahia grass(Paspalum notatum Flugge)cover plot(A)and mulch plot(B)during the 5 years were low, despite the occurrence of potentially erosive rains.In contrast,the bare plot(C)had both the highest surface runoff coefficient and the highest sediment yield.There were significant differences in interflow and surface runoff and no significant difference in groundwater runoffamong plots.The runoff coefficients and duration of interflow and groundwater runoff were in the order plot B>plot A>plot C.Effects of Bahia grass cover were excellent,indicating that the use of Bahia grass cover can be a simple and feasible practice for soil and water conservation on sloping red soil in the region
声诊断绒毛膜血管瘤1例

绒毛膜血管瘤为胎盘非滋养细胞肿瘤, 由胎盘内的血管畸形.形成瘤样结构. 较小的多位于胎盘内, 稍大的肿瘤往往向胎盘胎儿面突起.镜检显示疏松的基质内毛细血管增生改变. 较大的绒毛膜血管瘤可引起胎儿贫血、水肿甚至死亡. 超声检查可较准确地提示诊断
一氧化氮在创面愈合中的作用

创面愈合是指外伤或其他病变破坏造成组织损伤后, 局部进行修补的一系列病理生理过程, 是一个极其复杂的组织再生与修复的过程, 是由多种生长因子、细胞因子、炎症细胞及修复细胞共同参与完成. 随着一氧化氮(nitric oxide, NO)分子生物学的迅猛发展, NO参与并促进创伤修复的作用已被逐步证明[1]. 笔者就NO与创面愈合的关系综述如下
保守治疗有手术指征的急性硬膜下血肿三例

急性硬膜下血肿(acute subdural he-- matoma, ASDH)是神经外科重症创伤, 部分需要手术治疗. 文献报道的ASDH早期自我消散患者虽然数量不多, 但并不罕见[1-3]. 增强对这一现象的认识有利于我们更科学地评价患者的病情, 避免不必要的手术创伤
RF front-end for digital beam position monitor signal processor

RF circuit board has a significant impact on performance of the Digital Beam Position Monitor (DBPM) in storage ring of a synchrotron radiation facility. In this paper, a front-end RF board is designed for DBPM, and schematics of the RF board and the test results are given. In view of the inevitable inconsistency in the multi-channel circuit, a calibration circuit is designed to reduce such an influence. The test results show that the calibration method is useful for beam current dependence which is sensitive to channels inconsistency
医学编辑应对网络版冲击要努力提高双重业务水平

国家科技化快速发展,网络媒体势不可挡.作为医药学纸质媒体的编辑,需要提高医药学与编辑学的双重业务水平;这也是提高期刊质量的知识基础.数字化期刊(即网络型的电子期刊)与印刷版期刊是一种相互补充,互相推进的关系
锰锌铁氧体材料生产工艺控制要点

锰锌铁氧体是一种重要的软磁材料,其应用日益广泛,并对材料性能提出了越来越高的要求.材料的性能不仅取决于合理的配方,更与生产工艺密切相关.结合材料的生产工艺,归纳了各道生产工序对材料性能的影响及相应的质量控制要点,为企业生产技术人员提供实践参考
永磁铁氧体料浆制备工艺概述

在分析永磁铁氧体湿压磁场成型原理的基础上,讨论了料浆含水率对成型坯件取向度的影响,指出了料浆制备中料浆浓度控制的重要性;结合我国永磁铁氧体料浆制备工艺发展历程,介绍了三种料浆制备方法的原理,特点,对三种料浆制备方法特点进行了比较.指明了料浆制备工艺发展的方向,并给出了一种简便的料浆浓度测量方法;最后,简单介绍了料浆的全封闭管道自动传输系统
共模及共模/差模一体化滤波电感磁饱和问题

基于滤波电感的工作原理,推导出电桥测出的漏电感与漏磁通的对应关系,并通过实例计算分析了漏电感导致滤波电感发生了磁饱和.介绍了几种共模/差模一体化滤波电感的磁芯设计方案,并着重介绍了VOGT公司的RK系列共模/差模一体磁芯.最后以常用的EE型磁芯为例,将线圈绕在两个边柱上,中柱开有适度的气隙,即可制成一款简单实用的共模/差模一体化滤波电感用磁芯
脱氧和夹杂物形态控制技术的复合处理方法

精铸件质量控制主要由浇冒口设计,蜡模制作,制壳工艺,熔炼与整理工序组成.其中熔炼十分重要,它涉及到铸件的力学性能,补焊率和成品率等
代谢组学在中医药领域的应用

代谢组学是研究机体代谢网络和代谢产物与机体所处环境之间联系的重要方法,与中医药的基本理论和诊疗思维有异曲同工之处,为研究复杂的中医理论和中医药的现代化提供了新的思路和研究平台. 目前采用代谢组学技术研究中药、中医理论的工作正在开展,有望在中医药研究领域取得新的突破
脊柱局部稳定肌训练对腰椎间盘突出症术后功能恢复的影响

腰椎间盘突出症(lumbar disc herniation, LDH)术后多数获得满意疗效, 但部分患者术后远期疗效不佳, 甚至症状加重, 其中继发腰椎失稳是导致症状复发的重要原因之一. 以往资料显示, 采用"五点支撑法"、"三点支撑法"和"飞燕点水法"等方法进行腰背肌训练有助于脊柱获得相应的稳定性和灵活性从而减少复发. 近年来, 学者们对核心肌群, 尤其是局部稳定肌群的研究越来越深入, 认为局部稳定肌群是维持腰椎稳定的第一道防线. 为探讨脊柱局部稳定肌群对 LDH术后功能恢复的作用, 本课题组自2006年5月始在传统腰背肌训练的基础上, 对患者施以强化局部稳定肌训练, 并设对照组进行比较, 经3年随访, 现报告如下
Prevalence of HPV Infection And Cervical Intraepithelial Neoplasia And Attitudes towards HPV Vaccination among Chinese Women Aged 18-25 in Jiangsu Province

Objective: Few data are available on the epidemiology of HPV and cervical cancer among Chinese women younger than 25 years old. This study aimed to estimate the HPV infection rate and the prevalence of cervical intraepithelial neoplasia (CIN) in women aged 18‐25, as well as their knowledge of and attitudes towards HPV vaccination. Methods: A population‐based cervical cancer screening study was conducted on women aged 18‐25 in Jiangsu province in 2008. Participants provided socio‐demographic, reproductive and behavioral information and completed a survey about their knowledge of and attitudes towards HPV vaccination. Women then underwent a gynecologic exam to provide two cervical exfoliated cell samples for high risk HPV DNA testing and liquid‐based cytology (LBC) as well as visual inspection with acetic acid (VIA). Women testing positive for any test were referred to colposcopy and biopsy. The gold standard for diagnosis of cervical lesions was directed or random biopsies. Results: Within the sample of 316 women, 3.4% of them were diagnosed with CIN grade 2 or worse lesions and 17.1% were found to be positive for HPV DNA. Among these young women, extra‐marital sexual behavior of them (OR=2.0, 95%CI: 1.1‐3.8) or their husbands (OR=2.6, 95%: 1.4‐4.7) were associated with an increased risk of HPV positivity. Although overall HPV awareness was low, after a brief educational intervention, 98.4% reported they would electively receive HPV vaccination and would also recommend that their daughters be vaccinated. However, most urban and rural women reported their ideal maximum out‐of‐pocket contribution for HPV vaccination to be less than 500 RMB and 50‐100 RMB, respectively. Conclusion: Our study indicates cervical disease burden is relatively high among sampled Chinese women aged 18‐25. Appropriate educational interventions for female adolescents and strategies to subsidize vaccine costs are definitely needed to ensure the effectiveness of vaccination campaigns in China
狂犬病病毒糖蛋白基因遗传变异研究进展

狂犬病病毒(Rabies virus, RABV)是一种不分节段的单股负链RNA病毒,属于弹状病毒科 (Rhabdoviridae)狂犬病病毒属(Lyssavirus). 狂犬病病毒属基因组长约12 000个核苷酸(nt),从3′端到5′端编码5个结构蛋白:核蛋白(N)、磷蛋白 (P)、膜蛋白(M)、糖蛋白(G)和转录酶大蛋白 (L)[1]. G是一种跨膜糖蛋白,存在于病毒包膜表面,能诱导产生中和抗体和刺激细胞免疫,是有效的保护性抗原,也是狂犬病病毒与细胞受体结合的结构,并与病毒毒力直接相关[2]
对"关于'非饱和土抗剪强度及土压力统一解'的讨论"的答复

非常感谢余文龙博士对作者稿件细致地阅读和点评, 这些意见对作者今后的研究工作和论文撰写帮助极大. 以下将对<<非饱和土抗剪强度及土压力统一解>>[1](以下简称原文)一文中的一些问题, 谈一些作者的浅显认识, 并进行解释
SCI收录的鸟类学核心期刊介绍

SCI(Science Citation Index,科学引文索引),是美国科学情报研究所出版的一部世界著名的期刊文献检索工具,目前收录全世界出版的自然科学各学科的核心期刊3774种,其网络扩展版(Science Citation Index Expanded,SCI-E)的来源期刊为8183种.所收录的文献能全面覆盖全世界最重要和最有影响力的研究成果,是世界公认的自然科学领域最为重要,也是最具权威的检索和评价工具
同时有硬皮病和特应性皮炎样皮损的慢性移植物抗宿主病1例

讨论移植物抗宿主病(garft versus host disease, GVHD)是同种异基因造血干细胞骨髓移植(HSCT)的一个主要并发症, 是由于移植物组织中的免疫活性细胞与组织不相容性抗原受者组织之间的病理性免疫反应. GVHD可发生于任何组织和器官, 其中主要靶器官是皮肤、肝脏、肠道和淋巴系统. GVHD分为急性和慢性. 急性GVHD一般发生在移植后100 d以内, 皮肤表现为弥漫性皮疹, 呈麻疹或猩红热样, 重者表现为剥脱性皮炎或中毒性表皮松解症(TEN)样[1]. 慢性GVHD(cGVHD)一般发生在移植后100 d以后, 皮疹表现多样, 常见的有扁平苔藓样、硬皮病样、皮肤异色症样、色素沉着或色素脱失等[2], 少数患者可有银屑病样和脂溢性皮炎样皮疹
硬化性苔藓193例临床及组织病理分析

硬化性苔藓(1ichen sclerosus, LS)是一种病因不明的炎症性皮肤病, 女性多见, 可发生于任何部位, 但以生殖器受累最为常见. 其典型损害为瓷白色或淡粉红色丘疹及斑块, 晚期可出现明显萎缩. 组织学特征为真皮浅层出现透明样变性带(胶原均质化). 现将我科2001--2009年经组织病理检查确诊的193例 LS患者的临床组织病理资料分析如下
Spatial ModelingTechniques for Characterizing Geomaterials:Deterministic vs.Stochastic Modeling for Single-Variable and Multivariate Analyses

Sample data in the Earth and environmental sciences are limited in quantity and sampling location and therefore,sophisticated spatial modeling techniques are indispensable for accurate imaging of complicated structures and properties of geomaterials.This paper presents several effective methods that are grouped into two categories depending on the nature of regionalized data used.Type I data originate from plural populations and type II data satisfy the prerequisite of stationarity and have distinct spatial correlations.For the type I data,three methods are shown to be effective and demonstrated to produce plausible results:(1)a spline-based method,(2)a combination of a spline-based method with a stochastic simulation,and(3)a neural network method.Geostatistics proves to be a powerful tool for type II data.Three new approaches of geostatistics are presented with case studies:an application to directional data such as fracture,multi-scale modeling that incorporates a scaling law, and space-time joint analysis for multivariate data.Methods for improving the contribution of such spatial modeling to Earth and environmental sciences are also discussed and future important problems to be solved are summarized
POEMS综合征误诊为结核性多浆膜腔积液一例

讨论POEMS综合征是一种伴有潜在浆细胞恶性增生的类肿瘤性疾病, 主要临床表现为多发性神经病变 (polyneuropathy), 脏器肿大(organomegaly), 内分泌病变 (endocrinopathy), M蛋白血症(M protein), 皮肤改变(skin changes), 故名POEMS综合征
基于积分近似矩量法的声波团聚数值模拟

(1)求解气溶胶动力学方程时,积分近似矩量法比传统的分组算法精度更高,速度更快,适合用于声波团聚的数值模拟.(2)仅考虑碰撞效率修正的同向团聚机理时,数值计算结果表明本文采用的燃煤飞灰的最佳团聚频率约为1500 Hz,与实验结果较为符合.这表明同向团聚机理是燃煤飞灰声波团聚的主要控制机理,可用于团聚效果的初步预测.(3)对于同向团聚机理控制的声波团聚过程,数值模拟结果表明:气溶胶分散度越高,团聚效果越好;温度升高,也能一定程度地促进团聚效果.关键词:声波团聚;积分近似矩量法;气溶胶;矩量
放烧复合伤的造血保护与免疫调节研究

放射损伤合并烧伤的放烧复合伤, 是战时核爆炸与平时核事故、以及贫铀弹伤害或核恐怖袭击时所发生的主要伤类之一. 此类复合伤的主要特点是整体伤情重、发展快、诊治难, 因此需要不断深入研究[1]. 国内外对放烧复合伤的研究均十分重视[2-8], 国外以俄罗斯研究较多[3-4]. 美国自"911"事件后尚逐渐加强, 2007年3月由美国国立卫生研究院 (NIH)牵头召开了复合伤研讨会, 我们应邀为大会作放射复合伤的研究报告[9], 引起与会者重视[10]; 为应对核恐怖袭击, NIH于2007年9月公布了复合伤研究的项目申请指南. 国内于20世纪60年代曾有多个单位开展复合伤研究, 但因各种原因, 大多数没有坚持, 目前主要集中于第三军医大学全军复合伤研究所[2, 9]. 由于放烧复合伤的发病环节较多, 发病机制复杂, 极大地影响着复合伤的预后转归和救治[11]. 以下主要对放射损伤复合烧伤后的造血保护与促进造血重建、感染控制与免疫调节等重要环节的研究进行综述
Ultrastructure of extrusomes in hypotrichous ciliate Pseudourostyla nova

The ultrastructure of extrusomes of the hypotrichous ciliate Pseudourostyla nova was observed in scanning and transmission electron microscopy and enzyme-cytochemistry. The results show that the distribution, morphological characteristics, morphogenesis process, and extrusive process of the extrusomes in P. nova are different from the trichocysts in Paramecium, suggesting that the extrusomes of P. nova can respond to environmental stimuli, play an important role in the defense of this species, and cannot be regarded as "trichocysts". The results also suggest that the extrusomes might be originated from the Golgi apparatus and mature in the cytoplasm; after the extrusion of mature extrusomes, the residual substance might be reabsorbed and reused by the ciliate cell via food vacuoles, and take part in material recycling of the cell
Synthesis of three bromophenols from red algae as PTP1B inhibitors

Bromophenols are a set of natural products widely distributed in seaweed, most of which exhibit interesting and useful biological activities. To develop a reliable and efficient synthetic route to these natural bromophenols, three of them, 3,4-dibromo-5-(2'-bromo-3',4'-dihydroxy-6'-methoxymethyl-benzyl)-benzene-l,2-diol (compound 9), 3,4-dibromo-5-(2'-bromo-6'-ethoxy methyl-3',4'-dihydroxybenzyl)benzene-1,2-diol (compound 10), and 3-bromo-4-(3'-bromo-4',5'-dihydroxy benzyl)-5-(ethoxymethyl)-benzene-1,2-diol (compound 14), isolated from red marine algae, have been synthesized in eight steps with an overall yield of 14.4%, 14.4%, and 18.2% respectively, via a practical approach employing bromination, Wolff-Kishner-Huang reduction and a Friedel-Crafts reaction as key steps. The protein tyrosine phosphatase 1B (PTP1B) inhibitory activities of the synthetic compounds were evaluated by the colorimetric assay. The results show that these compounds are moderate PTP1B inhibitors. The synthesis of these bromophenol derivatives makes in vivo studies of their structure-activity relationships and inhibition activity against PTP1B possible
鼻内镜下鼻咽腔多部位活检在早期鼻咽癌诊断中的价值

鼻咽癌是我国南方地区较常见的恶性肿瘤,具有局部侵袭力强,浸润性扩展,极易侵犯邻近组织器官,区域淋巴结转移率高等特点,世界人口标化病死率达12.46/10万(男)和5.00/10万(女),因此早期诊断,早期治疗对提高鼻咽癌的生存率极为重要.鼻咽活检病理组织学诊断是鼻咽癌确诊的金标准,一旦发现鼻咽部可疑病灶,应对可疑部位和好发部位进行活检,往往可发现早期病例[1].鼻内镜检查技术以其图像清晰,光亮度强,能引导器械操作,取活检定位准确等特点已经成为临床上观察鼻咽部最有价值和最具优势的检查手段之一[2,3].我科自2001年以来采用鼻咽腔多部位活检确诊28例早期鼻咽癌患者
全反式维甲酸对阿霉素肾病大鼠足细胞的保护作用

目的探讨全反式维甲酸(ATRA)对阿霉素肾病大鼠足细胞是否具有保护作用.方法通过建立阿霉素肾病大鼠模型,随机分为三组,即对照组,模型组,治疗组,于阿霉素注射后第2天治疗组每天给予20 mg/kg ATRA灌胃,每周检测24-h尿蛋白定量,4周后处死大鼠,检测血清白蛋白,胆固醇,甘油三酯,血肌苷,尿素氮,nephrin的表达.结果治疗组与模型组相比大鼠尿蛋白明显减少(P<0.01).治疗组nephrin蛋白和mRNA含量均较模型组有所增加(P<0.05).结论 ATRA对阿霉素肾病大鼠足细胞有保护作用,其机制部分与nephrin的表达改变有关
前列腺癌标志物PCA3的研究现状

前列腺特异抗原(PSA)是目前临床上应用最广的前列腺癌肿瘤标志物,但事实上它并非前列腺癌特异性指标,其监测前列腺癌进展和复发的作用尚有争论.近年来的研究发现,前列腺癌基因3(PCA3)用于诊断前列腺癌的敏感性及特异性均优于PSA,有望成为临床上诊断前列腺癌的新的标志物
脊柱结核的治疗方案存在仁智之争

脊柱结核治疗理念一直在发展、进步, 目前对脊柱结核治疗原则达成了初步共识, 即全身营养支持是基础, 药物治疗是根本措施, 手术仅是辅助手段, 但也存在着很多争论"". 2010年<<中华骨科杂志>>第30卷第7期发表了王自立教授的<<脊柱结核的手术策略>>一文[5], 张西峰教授就此发表了不同的意见<<用微创的视角解读<脊柱结核的手术策略>>>(见本期页). 仔细拜读了两位教授的大作, 并查阅相关文献, 学到了很多东西, 有一些自己的体会. 2000年第四次全国结核病流行病学抽样调查显示全国结核发病率平均为367/10万人, 而重庆地区为549/10万人, 每年新发现4万例结核病患者, 是京、津、沪的10余倍, 结核疫情属于"重中之重". 结合我们近年来收治数百例脊柱结核的经验谈一点对两文的认识, 欢迎同行们批评指正
膝下动脉闭塞性病变的血管腔内治疗

膝下动脉病变大多呈弥漫多节段, 甚至长段闭塞, 以往只能采用大隐静脉旁路移植术治疗, 但旁路移植术治疗创伤较大, 技术要求高, 一些患者愿意选择创伤性小的治疗方法[1]. 因此, 当前如何更好地改善膝下动脉血供, 减少或避免发生肢端缺血坏死, 避免截肢或降低截肢平面, 仍是血管外科医师关注的临床课题. 我院于2008年3月至2009年12月对9例膝下动脉闭塞性病变采用经皮腔内血管成形术(19ercutaneous transluminal angioplasty, P11A)治疗, 现治疗体会报告如下
肺功能障碍与脊柱侧凸

脊柱侧凸畸形对肺功能的影响是不言而喻的. 由于胸腔骨性结构的改变, 使胸腔容积缩小, 肺实质受到压迫, 气道也常弯曲受压. 另外, 胸腔骨性结构的改变常导致呼吸肌发育较差, 收缩力减弱, 膈肌活动幅度减小, 导致通气功能的机械力学改变. 这些病理改变均可导致脊柱侧凸患者的通气障碍. 对于早发性脊柱侧凸患者, 脊柱畸形甚至可影响患者的肺脏发育, 引起肺换气障碍
南五味子总木质素有效部位镇静、催眠作用研究

目的:评价经纯化工艺制得的南五味子总木质素有效部位的镇静、催眠作用. 方法:应用小鼠自发活动实验研究该成分部位对小鼠活动的影响;应用协同阈上和阈下剂量戊巴比妥钠的睡眠实验研究该成分部位对小鼠入睡潜伏期和睡眠时间的协同影响作用. 结果:南五味子总木质素部位提取物25mg/kg、50mg/kg、100mg/kg剂量灌胃给药,均能抑制小鼠自发活动;并对阈上、阈下剂量戊巴比妥钠睡眠实验均具有显著协同作用. 结论:提纯后的南五味子总木质素有效部位具有显著的镇静、催眠活性作用
Cost-benefit analysis of screening for esophageal and gastric cardiac cancer

In 2005, a program named "Early Detection and Early Treatment of Esophageal and Cardiac Cancer" (EDETEC) was initiated in China. A total of 8279 residents aged 40-69 years old were recruited into the EDETEC program in Linzhou of Henan Province between 2005 and 2008. Howerer, the cost-benefit of the EDETEC program is not very clear yet. We conducted herein a cost-benefit analysis of screening for esophageal and cardiac cancer. The assessed costs of the EDETEC program included screening costs for each subject, as well as direct and indirect treatment costs for esophageal and cardiac severe dysplasia and cancer detected by screening. The assessed benefits of this program included the saved treatment costs, both direct and indirect, on esophageal and cardiac cancer, as well as the value of prolonged life due to screening, as determined by the human capital approach. The results showed the screening cost of finding esophageal and cardiac severe dysplasia or cancer ranged from Y2707 to Y4512, and the total cost on screening and treatment was Y13 115-?4 920. The cost benefit was Y58 944-Y155 110 (the saved treatment cost, ?7 730, plus the value of prolonged life, Y41 214-Y137 380). The ratio of benefit-to-cost (BCR) was 3.95-11.83. Our results suggest that EDETEC has a high benefit-to-cost ratio in China and could be instituted into high risk areas of China
艾司洛尔治疗交感风暴4例报告

讨 论 心室电风暴(ventricular electrical stom,VES)[1]又称室速风暴、交感风暴、儿茶酚胺风暴、ICD风暴、电风暴,是心脏猝死的重要原因. 2006年美国心脏病学会、美国心脏病协会和欧洲心脏病学会(ACC/AHA/ESC)发布的<<室性心律失常的诊疗和心源性猝死(SCD)预防指南>>(以下简称<<指南>>),将其定义为24h内自发的室速、室颤≥2次,并需要紧急治疗的临床症候群[2],其来势凶险,瞬息多变,犹如风暴. VES是一种危重但可治愈的临床综合征,急性期的合理处理可为后期深入治疗提供机会. 电复律/电除颤是终止室速/室颤的有效措施,但不足以消除其触发因素或基本病因. 心室电风暴发病机制可能为交感神经过度激活,导致儿茶酚胺大量释放,经酶促反应使细胞膜离子流发生改变,引起恶性心律失常;可应用β受体阻滞剂如艾司洛尔[3]治疗. 盐酸艾司洛尔是一种超短效、选择性β1受体阻滞剂,主要在心肌竞争儿茶酚胺结合位点而抑制β1受体,其分布半衰期仅2min,消除半衰期约9min. 2006年ACC/AHA/ESC发布的<<指南>>指出,静脉注射β受体阻滞剂是治疗心室电风暴的唯一有效方法[2]. 临床也有应用艾司洛尔治疗室颤并发心功能不全及心源性休克取得良好效果的个别报道[4-5]
Rectifying Properties of a Nitrogen/Boron-Doped Capped-Carbon-Nanotube-Based Molecular Junction

Based on the non-equilibrium Green's function method and first-principles density functional theory calculations, we investigate the electronic transport properties of a nitrogen/boron-doped capped-single-walled carbonnanotube-based molecular junction. Obvious rectifying behavior is observed and it. is strongly dependent on the doping site. The best rectifying performance can be carried out when the nitrogen/boron atom dopes at a carbon site in the second layer. Moreover, the rectifying performance can be further improved by adjusting the distance between the C60 nanotube caps
Dark respiration in the light and in darkness of three marine macroalgal species grown under ambient and elevated CO_2 concentrations

Dark respiration(non-photorespiratory mitochondrial respiration), which occurs both in the light and in darkness,is vital for growth and survival of algae and plays a critical role in modulating the carbon balance of them. In the present study,we have investigated dark respiration in the light (RL)and in darkness(RD)in three marine macroalgal species, Hizikia fusiformis(phaeophyta), Gracilaria lemaneiformis(Rhodophyta)and Ulva lactuca(Chlorophyta), cultured at 20℃ using aeration with two CO_2 conditions:current ambient(CO_2 concentration about 380μl/L)and elevated CO_2(approximately 720μl/L)air. RL was estimated by using the Kok method, whereas RD was determined as the rate of O2 influx at zero light. The results showed that both RL and RD were unchanged for the elevated CO_2-grown algae relative to ambient CO_2 concentration for all the algal species tested. However,RL was significantly lower than RD across all the algal species and growth CO_2 treatments, demonstrating that daytime respiration was partly depressed by the light. The percentage of inhibition of respiration by light was similar between ambient and elevated CO_2grown algae. The ratio of respiration to photosynthesis, which tended to decrease when estimated using RL instead of RD, was not altered for the elevated relative to ambient CO_2 concentration. The results suggest that RL, rather than RD,is a more accurate estimate of nonphotorespiratory carbon loss in marine macroalgae during the daytime. It would not be anticipated that elevated atmospheric CO_2 would exert a substantial influence on respiratory flux either in the light or in darkness in these particular marine macroalgal species
松果梢斑螟对油松球果挥发物的触角电位反应

松果梢斑螟(Dioryctria pryeri)是我国松属(Pinus)针叶树重要害虫之一,该虫属寡食性害虫,在我国北方主要危害油松(Pinus taebulaeformis)(李宽胜,1992;李新岗,2002).此虫1年1代,以2龄幼虫越冬,幼虫在5--6月份钻蛀球果及新梢,致使嫩梢枯萎,球果干瘪,影响油松的正常生长发育和种子生产(袁荣兰等,1990;姚远等,1996),特别是结实期的油松种子园,母树林受害最为严重.松果梢斑螟可与油松球果小卷蛾(Gravitarmatamargarotana)一起危害油松球果,在油松良种基地造成巨大的产量损失(李新岗等,2006;2007)
基于反射光谱的山核桃幼苗氮素营养状况分析

山核桃(Carya cathayensis)是世界著名的干果之一,也是重要的木本油料作物,其油味清香,营养丰富,是优良的休闲保健食品.山核桃长期以来产量不稳,大小年现象明显,通过肥水管理,病虫害防治等有效管理措施,大部分产区大小年现象都明显趋缓,产量逐年上升(黎章矩,2003).我国山核桃研究起步较晚,在其营养方面的研究甚少.有很多山核桃林农在经济利益的驱使下盲目施肥,特别是氮肥,导致很多山核桃林地出现施肥过量现象,这不仅降低肥料的利用效率,而且造成资源的浪费,引发严重的污染.因此,寻求简便,快速,无破坏地检测山核桃的生长状况,进而指导山核桃施肥和种植管理十分必要
病例105:肺动脉扩张

病人诊断为DPA.患者以反复胸闷1年多,伴气喘,心悸来就诊,血压,心率均正常,心脏听诊:心尖区闻及S1分裂,肺动脉瓣区闻及S2分裂,肺动脉瓣听诊区闻及3/6收缩期杂音,余三诊未见明显异常.胸片提示:心影异常,心腰部膨隆.追问病史,以前并无胸后及心前区的不适,亦无高血压,风心病等病史.拟诊:胸闷待查.行胸部CT血管造影,见图3
我国气候变化研究的倡导者和实践者----施雅风院士

施雅风先生诲人不倦,治学严谨,具有良好的科研道德.他十分关注人才的选拔和培养,亲自培养和选拔了包括两院院士在内的一大批国内外知名科学家,并用获得的奖金和自己的积蓄支持希望小学建设和颁发奖学金;出资建立科学基金以表彰和鼓励为冰冻圈科学做出贡献的科技工作者.他气度宽宏,胸怀若谷,兼容并蓄,淡泊名利,宁静致远,注重大局,把国家,民族和学科的利益置于个人之上.施雅风先生具有严谨,求是的工作作风,为人正直的高贵品质,睿智而有远见的科学目光,慈祥而朴实的人格魅力,是一位始终将生活高度融入自己热爱事业的师者,是一位始终执着于研究工作的科学家,是一位传递优秀科学家品质的践行者.他兢兢业业,潜心学术研究,并具有卓越的领导才能,为地理学,地貌学,冰川学和气候变化等科学事业做出了杰出的贡献.他不愧为地理学,地貌学,冰川冻土学的一代宗师,是我们尊敬的导师和学习的楷模
抗旱高产小麦新品种--山农16

山农16(原代号旱丰3号)是由山东农业大学生命科学学院,泰安市五岳泰山种业有限公司,德州市农业科学研究院等三家单位合作育成的抗旱小麦新品种,2007年经山东省农作物品种审定委员会审定通过(审定编号:鲁农审2007047号).该品种是由父本旱635与母本济南13有性杂交,经系谱法选育而成,特别适于旱地种植利用
中西医结合治疗糖尿病肾病肾功能不全的护理

糖尿病是由不同病因与发病机制引起体内胰岛素绝对与相对不足以致糖蛋白质和脂肪代谢障碍,而以慢性高血糖为主要临床表现的全身性疾病.糖尿病肾病主要是血管损害为主的肾小球病变,即糖尿病性肾小球硬化症,是糖尿病全身性微血管合并症之一,也是最常见,最严重的糖尿病并发症
桔梗皂苷D提取的响应面法优化

目的利用响应面法优化桔梗皂苷D的提取工艺.方法以桔梗为实验材料,采用高效液相色谱-蒸发光检测器(HPLC-ELSD)测定梗皂苷D.通过单因素实验,确定响应面实验因素与中心水平.根据Box-Behken实验设计原理,采用三因素三水平的响应面法,以桔梗皂苷D提取率为响应值作响应面,分析各个因素的显著性和交互作用.结果桔梗皂苷D水提的最佳工艺条件为:液料比10.7,提取温度96.2℃,提取时间66.3 min.结论在最佳工艺条件下,桔梗皂苷D的实际提取率为0.330 5%,高于其他条件下的提取率;该工艺条件可为桔梗皂苷D的工业生产提供参考数据
宁血饮干预治疗小儿难治性血小板减少性紫癜的临床观察

目的观察宁血饮对小儿难治性特发性血小板减少性紫癜(ITP)的临床疗效.方法难治性特发性血小板减少性紫癜患儿40例,随机分为宁血饮干预治疗组23例和单纯激素组17例.宁血饮干预治疗组采用宁血饮和强的松联合治疗,单纯激素组采用强的松治疗.观察患儿皮下紫癜等出血症状,血小板计数,血小板相关抗体(PAIgG)和远期疗效等情况.结果宁血饮干预治疗组在改善出血症状,提升血小板计数,降低PAIgG的水平,治疗的总有效率,远期疗效等方面均明显优于单纯激素组,两组比较有显著差异性(P<0.01).结论宁血饮联合激素治疗小儿难治性ITP疗效好,远期疗效优越,值得在临床上推广
丹参酮ⅡA治疗脑梗塞的疗效观察及对自由基的影响

目的探讨丹参酮ⅡA治疗急性脑梗塞的疗效及对自由基的影响.方法 100例急性脑梗塞病人随机分为两组,对照组50例进行基础治疗,治疗组50例在基础治疗的同时给予丹参酮ⅡA静脉注射,观察治疗前后神经功能缺失评分,Barthel指数及测定血浆脂质过氧化物(LPO)含量,超氧化物歧化酶(SOD)活性及丙二醛(MDA)水平的变化.结果治疗组治疗后神经功能缺损评分明显下降, Barthel指数升高;SOD活性明显增高,LPO及MDA含量显著下降,与对照组治疗后比较均有统计学意义.结论丹参酮ⅡA具有明显清除自由基作用,是治疗急性脑梗塞有效的药物
四君子汤及党参对小鼠神经细胞蛋白质组表达的影响

目的通过四君子汤及党参对神经细胞的作用,获得差异性蛋白质,全面评价中药及其复方制剂对细胞的综合生物学效应.方法培养小鼠神经元7 d,随机分为3个组,即四君子汤刺激组,党参刺激组和空白对照组,药物作用20 min,裂解细胞,提取全细胞蛋白.双向电泳(2-DE)分离, ImageMaster 2D Platinum软件进行差异表达蛋白质组分析,基质辅助激光解吸附离子化飞行时间质谱(MALDI-TOF-MS)鉴定蛋白质.结果在小鼠神经元双向电泳图谱上四君子汤组共检出蛋白质斑点410个,党参组共检出蛋白质斑点371个;鉴定了四君子汤组与党参组显著差异蛋白质3种,分别是锌指蛋白148,角蛋白细丝偶联蛋白,神经丝M蛋白,它们均属于磷酸化蛋白质.结论①四君子汤作用于小鼠神经元的表达蛋白质组与党参组比较存在明显的差异,主要表现为斑点数目和灰度值的改变.②四君子汤及党参对小鼠神经元的药理作用很有可能是通过相应的细胞信号转导网络系统来发挥的
逍遥散对肝郁气滞型乳腺增生病大鼠血清激素的影响

目的探讨逍遥散对大鼠肝郁气滞型乳腺增生病模型血清激素的影响.方法将雌性未孕SD大鼠分为正常组,模型组,自然恢复组,逍遥散低剂量,中剂量,高剂量等6组.正常组以外各组大鼠隔2 d肌肉注射1.0 mg/kg苯甲酸雌二醇注射液共10次后每日肌肉注射黄体酮注射液5.0 mg/kg,连续5 d,在造模过程中,将大鼠隔日束缚过夜共17次.造模成功以后,逍遥散组用逍遥散水煎液给予灌胃治疗,低剂量组为5.9 g/kg,中剂量组为17.7 g/kg,高剂量组为53.1 g/kg.治疗3周;自然恢复组在造模成功以后,去除造模因素,不给任何实验处理,自然恢复3周.比较各组血清激素变化.结果逍遥散低剂量,中剂量,高剂量治疗组大鼠血清PRL,E2降低,血清P升高.结论逍遥散能调节模型大鼠血清激素至正常水平,在低,中,高剂量之间有一定的量效关系
枇杷叶中总黄酮含量的高效液相色谱测定

目的建立枇杷叶样品中总黄酮含量的高效液相色谱(HPLC)测定方法,并比较不同采收季节叶片及嫩叶,成熟叶,老叶中的总黄酮含量.方法采用酸水解法处理样品得到黄酮苷元,通过HPLC法测定黄酮苷元槲皮素和山萘酚的含量,据此计算总黄酮含量.流动相为甲醇-0.4﹪磷酸水溶液(50:50),流速为1.0 ml·min-1,检测波长为360 nm,柱温30℃.结果枇杷叶中以槲皮素与山萘酚为母核的黄酮含量相差不大,且不同采收季节含量变化趋势基本一致.总黄酮含量在不同时期的变化明显.结论该方法操作简单,灵敏度高,重复性好,可用于枇杷叶中总黄酮的含量测定
枳术汤对脾虚便秘小鼠Cajal间质细胞和一氧化氮表达的影响

目的通过观察脾虚便秘小鼠cajal间质细胞(interstitial cells of Cajal,ICC)和一氧化氮(nitric oxide,NO)表达的变化,探讨枳术汤对脾虚便秘小鼠胃肠动力靶向调控的可能机制.方法采用脾虚泄泻,饥饱失常以及燥结便秘等复合因素造模方法制作脾虚便秘模型;造模组分别予以枳术汤,便秘通口服液,蒸馏水干预;用免疫组化染色方法观察神经型一氧化氮合酶(neuronal nitric oxide synthase,nNOS)和Cajal间质细胞c-kit抗体的表达情况.结果模型组和蒸馏水组的nNOS和c-kit的表达均较正常对照组减少(P<0.01),经治疗后,枳术汤大,中剂量组恢复接近至正常水平,与模型组和蒸馏水组比较有显著差异(P<0.01).结论枳术汤对脾虚便秘小鼠模型胃肠动力靶向调控机制可能与NO和ICC有关
中西药结合治疗慢性重型乙型肝炎42例

目的:观察清热解毒,活血化瘀类中药配伍并结合西药治疗慢性重型肝炎的疗效.方法:采用自拟清肝汤(生大黄,虎杖根,生赤芍,丹参,山栀等)加减结合西药治疗本病42例.结果:治疗组有效率73.81,较单纯西药治疗有效率53.65%有显著差异,提示本方有清热解毒,利胆退黄,活血行瘀的功效
略论台湾汉人青草药民俗医疗与医药始源的关联

民俗医疗是台湾现时3种医疗体系之一种,虽然次于中,西医疗体系而居于末流,但过去却是台湾先民医疗体系的主流.民俗医疗中采用青草药治病的是非超自然部分,更贴近人类"食与药"的医疗始源.本文就透过台湾青草药与民俗医疗的关系,来探讨二者在台湾医学发展过程中所扮演的角色
消渴病与脏腑之间关系之探讨

早在<<内经>>一书中,消渴即为备受重视的病证,很多篇皆有论述,除消渴之名外,尚有消痹,风消,鬲消,肺消,消中等称谓.人体脏腑,五脏"藏精气而不泻",六腑"传化物而不藏",消渴之疾,为精微不藏而溲下,主要是五脏功能失调而致.值得重视的是,<<灵枢·五变>>曰:"五脏皆柔弱者,善病消瘅."五脏虚弱时消渴发病的病理基础.这里明确提出五脏柔弱皆可为消渴,这一辨证观有效地指导了辨证论治
两系杂交中稻广两优476在湖北潜江示范种植表现及高产栽培技术

2010年两系杂交中稻新组合广两优476在湖北潜江示范种植6.8 hm2,表现生育期适中,抗病性强,丰产性好,米质优,适合潜江地区种植.探索了该组合高产栽培技术
两系超级杂交稻丰两优4号高产制种技术

丰两优4号(丰39S/盐稻4号选)是合肥丰乐种业股份有限公司育成的两系超级杂交稻组合,根据该组合在江苏的多年制种实践,提出了该组合安全高产制种技术
高温贮存环境对杂交水稻种子发芽率的影响研究

研究不同水稻品种和不同含水量的同一品种在30和40℃高温,高湿贮藏条件下的发芽率变化,结果表明:高温,高湿环境对水稻种子的发芽率影响较大,种子的含水量越高,贮存温度越高,其发芽率下降速率越快
中药气味鉴别的研究现状与展望

在药材的传统质量评价体系中,气味是十分重要的一个评价指标.许多常用中药都具备特殊芳香气味,依据各具特色的气味有效地鉴别药材真伪,辨明优劣是传统中药质量评价重要内容.但因其缺乏客观性,准确性和可重现性而受到质疑与挑战.随着科学技术的发展,有越来越多的方法用于评价有特征气味的药材质量.本文综述了近年来中药气味鉴别研究的进展,认为在现代科学技术高速发展的背景下,药学界对传统经验鉴别的不够重视,提出应用现代科学技术对中药性状气味的化学内涵进行客观表达的构想,对其应用前景进行了展望,并以当归,川芎为例加以说明
两种季节趋势模型预测法的应用比较

本文根据上海市松江区国家儿童流感监测点2006~2008年流感样病例就诊百分比(流感样病例就诊百分比)资料,应用两种季节趋势模型(基于季节指数的季节趋势模型和基于移动平均法的季节趋势模型)预测2009年1~12月份的流感样病例就诊百分比,并对两种模型进行比较