mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Dual effects of 3, 4-methylenedioxymethamphetamine (ecstasy) on survival and apoptosis of primary hippocampal neurons

BACKGROUND: 3, 4-methylenedioxymethamphetamine (MDMA, also known as "ecstasy") has been shown to exhibit neurotoxic effects on the hippocampus. However, exposure to sub-lethal insults of MDMA has been reported to result in neuroprotection.OBJECTIVE: To investigate the effects of MDMA on hippocampal neuronal viability, caspase-3 activity, and mRNA expression of the N-methyI-D-aspartate (NMDA) receptor 2B (NR2B) subunit.DESIGN, TIME AND SETTING: A cytological, in vitro experiment was performed at the Department of Anatomy, School of Medicine, and Department of Toxicology-Pharmacology, Faculty of Pharmacy,Tehran University of Medical Sciences in 2008.MATERIALS: MDMA was extracted from ecstasy tablets, which were kindly supplied by the Pharmacology-Toxicology Department, Faculty of Pharmacy, Tehran University of Medical Sciences, Iran.METHODS: Hippocampal neurons were isolated from Wistar rats at gestational day 18. Following primary culture, hippocampal neuronal viability was detected by MTT assay. Varying concentrations of MDMA (100-5 000 μmol/L) were used to determine lethal concentration 50 (LC_(50)), which was around 1 500 μmol/L. Five concentrations of MDMA below 1 500 μmol/L (100, 200, 400, 800, and 1 050 μmol/L) were used for the remaining experiments. After 24 hours of MDMA treatment,NR2B mRNA expression was detected by RT-PCR, and caspase-3 relative activity was determined by colorimetric assay.MAIN OUTCOME MEASURES: Hippocampal neuronal viability, caspase-3 activity, and NR2B mRNA expression.RESULTS: MDMA-induced neurotoxicity in hippocampal neuronal cultures was dose-dependent. In high concentrations (1 000-5 000 μmol/L) of MDMA, neuronal viability was decreased. However,with a 500 μmol/L dose of MDMA, neuronal viability was significantly increased (P < 0.01). Low concentrations of MDMA (200 and 400 μmol/L) significantly decreased caspase-3 activity (P < 0.01),whereas high concentrations of MDMA significantly increased caspase-3 activity (P < 0.01). NR2B subunit mRNA expression was not significantly altered after 100-1 050 μmol/L MDMA exposure.CONCLUSION: MDMA exhibits dual effects on hippocampal neuronal viability and caspase-3 activity. These effects are independent from NR2B subunit expression levels.
黑龙江阿城晚二叠世安加拉-华夏混生植物群——兼述古亚洲洋的关闭问题

记录了产自黑龙江阿城地区上二叠统红山组的20种植物化石,包括Paracalamites sp.,Pecopteris tangwangheensis Huang,C.obese Huang,C.shenshuensis Huang.C.tangwangheensis Huang,C.heilongjiangensis Huang,C zeilleri Zalessky,C sp.,Comia yichunensis Huang,C.tenueaxis Huang,Iniopteris sibirica Zalessky,Supaia teiliensis Huang,Compsoptens tchirkovae Zalessky,C. cf.adzvensis Zalessky,Nilssonia sp.1,Nil.sp.2,Taeniopteris cf.densissima Halle,T.cf.nystraemii Halle,T. sp.,Noeggerathiopsis derzavinii Neub.等.植物群主体为安加拉型,但共生有晚期华夏植物群的重要分子,显示了混生植物群的特点.主要分子的地史分布及与相似植物群的对比表明该植物群的时代为晚二叠世晚期,其混生的特点指示西伯利亚板块在晚二叠世和华北板块于西拉木伦河-长春-延吉缝合带拼合,古亚洲洋关闭.
四川龙门山活动断裂带典型地段晚第四纪强震多期活动证据

断错地貌调查和探槽开挖是获取活动断裂多期活动重要的线索.介绍了龙门山中央断裂带北川县城及平武县平通镇的断层沟槽调查及龙门山前山断裂带绵竹县汉旺镇台地前缘探槽开挖获得的认识.调查结果表明,北川断层沟槽包括汶川地震在内至少存在3次断层活动事件;平通断层沟槽包括汶川地震在内至少存在两次以上断层活动事件;汉旺探槽揭示了2～3次古地震事件.在上述3个地点中,北川断层沟槽和汉旺探槽在汶川地震前的一次强震时间接近,分别为大于5.8 ka和小于6.63 ka,接近为6ka.由此也获取了在汶川地震前龙门山活动断裂带的一次强震活动中,中央断裂带和前山断裂带同时活动的证据.
中国东部及邻近海域磁异常数据所揭示的深部构造

通过对中国东部及邻近海域磁异常数据的化极和上延处理,全面分析了不同构造块体和区域深大断裂的磁异常特征和空间展布,并在此基础上,通过计算化极后的磁异常数据的径向平均振幅谱,反演计算出区域居里等温面的深度分布.研究发现磁异常的化极和上延处理有效地增强了区域构造带(大别造山带、郯庐断裂、钓鱼岛隆起等)的边界特征.计算得到的居里等温面深度在19.6～48.9km之间,平均深约31.7 km,下扬子地区的苏北盆地和南黄海盆地的居里等温面明显较深,最深可达35 km左右,而其周围区域的居里等温面深约25 km,表明了下扬子地区的苏北盆地和南黄海盆地在构造演化以及基底岩性和结构上的独特性.从区域上看,沉积盆地(苏北盆地、南黄海盆地、东海陆架盆地)的居里等温面一般较深,而周围隆起区(钓鱼岛隆起、浙闽隆起)的居里等温面一般较浅.在火山活动区(琉球岛弧、济州岛周围)以及沿江绍断裂海域部分居里等温面隆升非常明显,表明来自深部强烈的岩浆或其他地热活动.
A new parallel scheduling system for multiple radio wireless mesh network

To enhance the capacity of wireless mesh networks,a key technique is widely investigated which is the usage of multi-radio and multi-channel diversity.In this paper,a new parallel scheduling system is proposed which exploits MAC diversities by transmitting packets on the radios opportunistically.Compared with conventional packet transmission which follows "one flow one radio",the new system uses radio diversity to transmit the packets on different radios simultaneously.Two kernel components of this system are selection module and schedule module.A localized selecting algorithm is implemented in the selection model to choose the right radios based on the quality of wireless links; two distributed packet-scheduling algorithms are optional with the schedule component.Finally,a routing metric adapting this system is presented.We have carried out a comprehensive performance evaluation of this system using ns-2.Simulation results show that it can successfully harness diversity of multi-radio and multi-channel to provide considerable improvements over a baseline multi-channel system in several situations.
Structural and vibrational properties of deformed carbon nanotubes

The fantastic variation of the physical properties of carbon nanotubes (CNTs) and their bundles under mechanical strain and hydrostatic pressure makes them promising materials for fabricating nanoscale electromechanical coupling devices or transducers. In this paper, we review the recent progress in this field, with much emphasis on our first-principles numerical studies on the structural and vibrational properties of the deformed CNTs under uniaxial and torsional strains, and hydrostatic pressure. The nonresonant Raman spectra of the deformed CNTs are also introduced, which are calculated by the first-principles calculations and the empirical bond polarizability model.
Molecular dynamics studies on the thermal conductivity of single-walled carbon nanotubes

We have studied the thermal conductivity of single-walled carbon nanotubes (SWCNTs) using the NEMD method. The results indicate that the thermal conductivity values are not profoundly influenced by the specific simulation-technique used in the MD simulations. Some possible reasons, which could be responsible for the discrepancy on thermal conductivity values of SWCNTs in the literatures, are discussed.
免疫组化在中枢神经系统转移瘤病理诊断中的应用

本文详细讨论了中枢神经系统转移瘤的临床表现以及各类相关的免疫组化标记物在病理诊断中的应用,并转用中枢神经系统常见转移瘤的免疫组化应用规则表.
基于Access的药学服务咨询数据库系统的开发

随着临床药学工作在各级医疗机构逐步落实,与之相关的各项工作也逐渐展开.其中,药学咨询工作意义十分重大~([1]),不仅让临床药师协助医生和护士等开展医疗和护理工作,而且能直接指导普通大众、患者及其家属合理用药~([1]).该项工作具有咨询对象类型复杂、问题内容广泛、信息量十分丰富以及随机发生等特点.如何准确、快速保留工作记录,及时向上级反映相关情况,分析归纳咨询的发展趋势,并与他人共享咨询内容等都是临床药师在咨询过程中应该做的工作.因此,开发一种界面简洁、友好、交互性强以及操作简便的药学服务咨询数据库系统,将为顺利完成上述工作提供便利,还可以提高药师的工作效率,减轻工作负担.
Cooperative game theoretic load balancing scheme with admission control in IEEE 802.11 WLANs

A load-balancing scheme for IEEE 802.11 WLANs based on cooperative game theory is presented.A coalition among the access points (APs) with overlapping coverage is formed to share the network load through a game.Firstly, the candidate APs submit their load-competing strategies (i.e., the amount of user traffic they can admit in an AC/game period) to the control AP.Secondly, the control AP solves the game by the method of shapley value, which is the maximum traffic allocated to each AP in an AC/game period.Finally, the game is repeated periodically to distribute the traffic load among the APs.Simulation results show that the proposed game can balance the network load effectively compared with the IEEE 802.11 standard balancing solution.
Random testing for system-level functional verification of system-on-chip

In order to deal with the limitations during the register transfer level verification, a new functional verification method based on the random testing for the system-level of system-on-chip is proposed.The validity of this method is proven theoretically.Specifically, testcases are generated according to many approaches of randomization.Moreover, the testbench for the system-level verification according to the proposed method is designed by using advanced modeling language.Therefore, under the circumstances that the testbench generates testcases quickly, the hardware/software co-simulation and co-verification can be implemented and the hardware/software partitioning planning can be evaluated easily.The comparison method is put to use in the evaluation approach of the testing validity.The evaluation result indicates that the efficiency of the partition testing is better than that of the random testing only when one or more subdomains are covered over with the area of errors, although the efficiency of the random testing is generally better than that of the partition testing.The experimental result indicates that this method has a good performance in the functional coverage and the cost of testing and can discover the functional errors as soon as possible.
Improved block matching approach to fast disparity estimation

An improved block matching approach to fast disparity estimation in machine vision applications is proposed, where the matching criterion is the sum of the absolute difference (SAD). By evaluating the lower bounds, which become increasingly tighter for the matching criteria, the method tries to successively terminate unnecessary computations of the matching criteria between the reference block in one image and the ineligible candidate blocks in another image. It also eliminates the ineligible blocks as early as possible, while ensuring the optimal disparity of each pixel. Also, the proposed method can further speed up the elimination of ineligible candidate blocks by efficiently using the continuous constraint of disparity to predict the initial disparity of each pixel. The performance of the new algorithm is evaluated by carrying out a theoretical analysis, and by comparing its performance with the disparity estimation method based on the standard block matching. Simulated results demonstrate that the proposed algorithm achieves a computational cost reduction of over 50.5% in comparision with the standard block matching method.
让昨天告诉今天:医用机器人研究的学术与技术发展

1985年,出现了基于工业机器人平台的外科机器人.20世纪80年代,机器人等自动化设备已经在工业领域获得了广泛应用,在操作灵活性、稳定性及准确性方面显示出了明显优势.为了解决外科手术中存在的精度不足、辐射过多、切口较大、操作疲劳等问题,人们开始探讨如何在外科手术中引入机器人技术,改善手术效果.1985年,美国的Kwoh YS等采用Puma560工业机器人完成了脑组织活检中探针的导向定位.
基于DEM的广东省赤红壤全磷与地形因子相关分析

以土壤类型图、地形图、全磷含量图等为数据源,利用ArcGIS建立广东省赤红壤DEM,提取海拔高度、坡度、坡向和地势起伏度,探索大尺度下全磷分布与地形因子的关系.研究表明:全磷与海拔高度、坡度和地势起伏度存在负相关,并随这些地形因子的上升分布面积迅速下降,变化呈现倒数形式:在坡向上,主要分布于平坦区域和东南坡.研究结果直接证明地形是土壤形成发育的重要因素,影响土壤全磷的积累及转化.
1 532例粪便常规检查和801例隐血试验结果的分析

粪便常规为三大常规之一,是就诊患者必检项目.但目前现状是阳性检出率极低.为了解就诊患者粪便常规及隐血试验的阳性情况,随机抽取某一时间段住院患者1 532例粪便的常规检查(检查内容为外观性状和涂片镜检)和801例隐血试验的结果,进行整理分析.
农业类非上市公司违约风险动态评价

本文结合我国实际情况对非上市公司动态风险度量模型PFM进行改进,采用神经网络方法估计非上市公司的资产价值和波动率,用资产保值增值率代替资产的连续回报,进行违约距离计算.对农业类非上市公司的实证分析表明本方法对我国非上市公司具有较好的信用风险评价和预测能力.
我国农民专业合作组织创新模式研究——基于"合作组织+期货市场"的视角

本文在总结了现有农民专业合作组织模式的优缺点后,分析了农民专业合作组织的创新模式--基于"合作组织+期货市场"模式,分析了新模式的可行性,并在此基础上提出了政策建议.
农户对产业化联盟的认知分析:以赣南脐橙业为例

农业产业化经营是中国农业突破制度、技术和市场等约束的现实选择,公司与农户缔结联盟是目前产业化经营组织的主导模式.公司与农户的交易嵌入在一定的交易情境中,交易情境的变化要求相机使用合约治理与关系治理手段.联盟的治理机制有效发挥作用才能降低交易成本、提高交易绩效.农户对交易情境、治理机制和联盟绩效的认知关系到联盟稳定性进而影响联盟绩效.对赣南脐橙业农户的调查表明,公司与农户联盟还存在一些不容忽视的问题,需要有的放矢地推出联盟治理措施才能促进农业产业化健康发展.
心包置管引流加凝血酶治疗恶性心包积液

@@ 随着恶性肿瘤发病率的升高,恶性心包积液有增多的趋势.恶性心包积液以积液量大、不易控制为特点,患者常死于心包填塞.采用置管引流加凝血酶治疗,为恶性心包积液患者提供了非常有效的治疗方法,能较快地明显改善患者心悸、气急、胸闷等症状,是一种简便、安全、效果好、并发症少的方法.
3种代谢综合征诊断标准下男女冠心病患者冠状动脉病变的比较

目的:探讨不同性别冠心病患者在美国国家胆固醇教育计划(ATPⅢ)、中华医学会糖尿病学分会(CDS)、国际糖尿病联盟(IDF)3种标准下代谢综合征的冠状动脉(冠脉)病变情况.方法:入选首次行冠脉造影证实有冠心病但排除急性心肌梗死后的患者共486例,其中男286例,女200例,分析不同性别在ATPⅢ、CDS、IDF 3种标准下代谢综合征的患病率及冠脉病变(用Gensini评分).结果:男性冠心病患者在ATPⅢ、CDS、IDF诊断标准下代谢综合征的患病率分别为48.3%、50.3%、45.1%,女性冠心病患者代谢综合征的患病率分别为63.5%、66.5%、62.5%,无论何种标准,男、女性Gensini评分均随危险因素的聚集而增高,女性代谢综合征患者Gensini评分高于男性,以Gensini评分为因变量行多元线性回归分析,代谢综合征是女性冠心病患者冠脉病变的独立危险因素,分别为β=0.358 、P=0.011,β=0.32、P=0.013,β=0.436、P=0.009;对于男性则关系不大,β=0.23、P=0.2,β=0.24、P=0.2,β=0.064、P=0.7.结论:无论何种标准,代谢综合征在冠心病患者中很普遍,多种危险因素聚集是加重病变的基础,这种改变在女性更为明显.
微藻油脂含量和组分及其影响因子的研究

随着全球经济发展和人口增长,油脂与人类的关系越来越密切,无论是作为生物柴油的原料还是加工成为保健食品,油脂都具有至关重要的作用.目前,油脂的主要来源仍然是植物以及动物脂肪,但是这种传统的油脂来源已经不能完全满足人们食用、工业等生活中的各种需求~([1]),因此寻找一种成本低、来源广以及成分好的油脂原料成为亟待解决的问题.
两种方式治疗儿童急性上呼吸道感染368例疗效对比与分析

0 引言急性上呼吸道感染常见病原体为病毒,少数是细菌,具有传染性,还有可能产生严重并发症,故应积极防治.儿童急性上呼吸道感染足小儿常见病、多发病之一.我院近年来对收治的急性上呼吸道感染伴发热患儿,分别采用小儿清热宁和双黄连口服液进行治疗,报道如下.
维生素AD滴剂治疗儿童鼻出血的临床观察

1 对象和方法1.1 对象 本组60例为我院2002-01/2008-08门诊患儿,诊断均符合儿童鼻出血的诊断标准,血常规、出凝血时间止常.随机分为两组:治疗组30(男12,女18)例,年岭3～14(平均8.5)岁,病程6 mo-3 a,平均1.5 a,轻度鼻出血10例,中度鼻出血15例,重度鼻出血5例,鼻出血发作频率1～4次/mo,出血发作持续时间10-30(平均15)min;对照组30(男10,女20)例,年龄4～12(平均8)岁,病程5 mo～4 a,平均2.5 a,轻度鼻出血10例,中度鼻出血14例,重度鼻出血6例,鼻出血发作频率1～3次/mo,出血发作持续时间10～28 min,两组性别、年岭、病情差异均无统计学意义.
奥沙利铂联合亚叶酸钙治疗晚期大肠癌的临床研究

0 引言 联合化疗已成为晚期大肠癌的主要治疗方法.近年来,奥沙利铂在胃肠道恶性肿瘤化疗中的作用颇受关注.国内外相关临床研究表明奥沙利铂对大肠癌有较好疗效,且与5-氟尿嘧啶有明显的协同抗癌作用.
多功能充气式便器在基层卫勤保障中的应用

0 引言 充气式多功能便器自2007-06/2009-05在基层卫生队及卫勤保障中对165例痔疮、肛瘘等会阴部术后患者使用中效果较好,特别对卫勤保障抗震救灾中骨折、意识不清等伤员后送中应用,效果满意.
儿童颅骨凹陷骨折26例

1 临床资料 2000/2005年我院共收治儿童颅骨凹陷骨折26(男20,女6)例,年龄3～13岁.闭合件骨折22例,开放性骨折4例,合并脑挫裂伤5例,硬脑膜外血肿10例.凹陷性骨折19例,凹陷性粉碎性骨折7例.
Fabrication and Characterization of Solar Cells Made of p-CuO/n-Si Hetero Junctions

Cupric oxide(CuO) is considered to be a promising material for photovoltaie applications. In this paper, p-CuO/n-Si junction solar cells were obtained by thermal oxidation of metallic copper films deposited on n-Si substrates at 400 ℃ for 5 h. X-ray diffraction patterns show that the as-prepared films are CuO with monoclinic crystalline structure. Hall effect measurement results show that CuO films are p-type conduction. A direct band-gap of ～1.57 eV for the CuO film is deduced from UV-Vis absorbance spectra. Solar cells of Cu/p-CuO/n-Si/Al structure show that its photovoltaic behavior has a much wider spectrum response width compared with that of Si solar cells. In addition, the photocurrent of CuO/n-Si junction is investigated as a function of CuO film thickness, and it is found that the critical thickness for CuO on Si is about 250 nm.
Simulation and assessment of sludge concentration and rheology in the process of waste activated sludge treatment

The process of using flat-sheet membrane for simultaneous sludge thickening and digestion (MSTD) was employed. The variations of sludge concentration and rheology were characterized and simulated. Based on mass balance analysis, mathematical models were developed and successfully used to predict and evaluate the variations of sludge concentration and the digestion efficiency in the MSTD process. The apparent viscosity of sludge could be modeled as functions of mixed liquor suspended solids and shear rates. The sludge in MSTD process showed both shear-thinning and viscoplastic behaviour, and under various shear rates different rheological models could be chosen to predict their flow behaviour. It was also found that sludge concentration and viscosity had significant correlations with membrane fouling in the MSTD process.
早熟优质中型西瓜"浙大蜜瓜"高效栽培技术

随着农业产业结构调整的不断深入和农村劳动力向城市的大量转移,农村留守人员在解决基本粮食生产的同时,逐步改变原有种植模式,把种植重点转移到经济作物上,以增加经济收人,改善生活水平.
测定种子活力的新技术——Q2技术

Q2技术是一种基于光学的氧气检测系统,通过检测种子在萌发过程中的氧气消耗情况来鉴定种子活力和质量.Q2技术可以快速且精确测量大量单粒种子的活力,可以应用于发芽试验和种子处理如包衣、引发、老化等结果的快速预测,在种子研究领域和商业上都具有广泛的应用前景.
国审小麦新品种"富麦2008"的特征特性与栽培技术要点

本文介绍了国审小麦新品种"富麦2008"的主要特征特性、产量试验示范结果、品质指标、抗性水平,分析了该品种主要优点,依据品种特性提出了关键栽培技术要点和栽培中应当注意的问题.
植物生长调节剂对决明子种子发芽及幼苗生长的影响

分别采用不同浓度的赤霉素(GA,)、6-苄氨基嘌呤(6-BA)及激动素(Kinetin)处理决明子种子.结果表明:适宜浓度的CA_3和6-BA均可显著地提高决明子种子的发芽率,并且对幼苗的早期生长有显著的促进作用,其中5 mg/L的6-BA处理效果最佳.Kinetin对发芽率和幼苗早期生长的影响不显著.
细胞核DNA复制与种子质量的关系

流式细胞技术能够快速准确地估计植物细胞核内DNA含量,可用于探测种子不同组织,如胚、胚乳中细胞分裂活性分布,从而了解种子的生理状态及变化.本文综述了种子发育成熟及发芽阶段DNA复制模式与预测最佳收获期和种子田间表现的关系,同时阐述了流式细胞技术在种子纯度控制上的应用,并展望了种子内DNA复制在种子质量控制上的应用前景.
肺纤维化常见中医证型研究

肺间质纤维化(简称肺纤维化)以弥散性肺泡炎和间质纤维化为基本病理改变,目前尚无治疗良策.近年来,对本病的中医病名归属、基本病机演变规律、常见证型及治疗研究等虽然取得不少进展,但尚存在一些问题,如临床研究缺乏大样本资料,且多为回顾性研究,难以把握本病发展过程中证候演变规律;报告中医证型较多,但尚无充分依据确定常见证型等.
Gene expression profiles in the peri-infarct brain cortex in a rat model of stroke-prone renovascular hypertension

BACKGROUND: Previous studies have focused on gene expression acutely following stroke onset. However, there have been a few reports of gene expression during later stages of cerebral infarction. OBJECTIVE: To determine gene expression profiling in the peri-infarct brain cortex 7 days after ischemia in a rat model of cerebral infarction in renovascular hypertensive rats.DESIGN, TIME AND SETTING: An in vivo, molecular experiment was performed at the Experimental Animal Center of Sun Yat-sen University and CapitalBio, Beijing, China between February 2004 and August 2005.MATERIALS: A 70-mer oligo chip containing 5 705 rat genes was supplied by CapitalBio, Beijing, China; and the Oligo rat gene bank was provided by Qiagen, the Netherlands.METHODS: Six Sprague Dawley rats were utilized to establish a stroke-prone renovascular hypertensive model using the two-kidney and two-clip method. The rats were subsequently randomly assigned to two groups: middle cerebral artery occlusion and sham-operation, with three rats in each group. The middle cerebral artery occlusion model was induced by intraluminal suture method. Incisions were sutured following isolation of carotid arteries in the sham-operation group. MAIN OUTCOME MEASURES: Total RNA was extracted from the peri-infarct cerebral cortex 7 days after surgery. Following fluorescent labeling, RNA was hybridized to an Oligo chip containing 5 705 genes and was then scanned. Images were collected and the differentially expressed genes (number and category) were selected by data analysis. RESULTS: A total of 174 genes were upregulated, and 23 were downregulated, in the peri-infarct cerebral cortex 7 days after ischemia. The upregulated genes were distributed among 12 functional categories, and the downregulated genes belonged to categories of transport, transcription regulators, signals, response to stress, metabolism, and cell adhesion. The expression of some cytoskeletal genes was upregulated, including VIM, A2M, B2M, ACTR3, and ARPC1B. Expression of a few cell adhesion-related genes (such as NLGN1, LGALS1, LGALS3, COL1A1, COL2A1, and SPP1) and other inflammation-related genes (such as C1QB, C1S, C4, C5R1, CFH, CD14, CD164, CD47, CD48, CD53, CD8B, IFNGR, and TFITM2) were upregulated. The glutamate-receptor gene GRIK5 was downregulated, which is related to the excitatory neurotransmitter glutamate. However, expression of the inhibitory neurotransmitter GABA-related genes was bidirectional - namely, GABRA5 downregulation and GABARAP upregulation.CONCLUSION: Upregulation of many cell adhesion and inflammation related genes and downregulation of excitatory glutamate-related receptor genes revealed active gene expression during later stages of cerebral infarction, which suggested molecular mechanisms of injury or repair.
径移速度对SSD谱线轮廓及成像影响

在考虑标准薄盘流体元径移速度的情况下,推导出Kerr黑洞附近吸积盘的观测谱线流量的一般计算式.利用光子追踪法,计算不同参数条件下标准薄吸积盘的谱线轮廓,通过比较考虑径移速度和忽略径移速度两种情况下吸积盘的谱线轮廓,得出在多数情况下,径移速度对谱线流量的影响是显著的,两种情况下吸积盘流量成像图形状基本不变.
Computational approaches for fast generation of digital 3D video holograms Invited Paper

Several approaches for fast generation of digital holograms of a three-dimensional (3D) object have been discussed. Among them, the novel look-up table (N-LUT) method is analyzed to dramatically reduce the number of pre-calculated fringe patterns required for computation of digital holograms of a 3D object by employing a new concept of principal fringe patterns, so that problems of computational complexity and huge memory size of the conventional ray-tracing and look-up table methods have been considerably alleviated. Meanwhile, as the 3D video images have a lot of temporally or spatially redundant data in their inter- and intra-frames, computation time of the 3D video holograms could be also reduced just by removing these redundant data. Thus, a couple of computational methods for generation of 3D video holograms by combined use of the N-LUT method and data compression algorithms are also presented and discussed. Some experimental results finally reveal that by using this approach a great reduction of computation time of 3D video holograms could be achieved.
岩白菜素药源植物资源研究进展

岩白菜素具有镇咳祛痰的功效,作为传统用于治疗呼吸系统疾病的特效药,市场需求量大.目前已有20科37属88种植物均含有岩白菜素的研究报道,其中虎耳草科鬼灯檠属、岩白菜属、落新妇属,紫金牛科紫金牛属植物较为普遍,西南鬼灯檠、羽叶鬼灯檠和岩白菜是提取岩白菜素的主要植物资源,含有3.0%以上的岩白菜素.我国西南和西北地区是岩白菜素药源植物资源的主要分布区,但近年来野生资源迅速减少,有必要开展主要药源植物的保护与繁育及种植研究.
椒目超临界提取物中挥发性成分的气相色谱-质谱分析

椒目为芸香科花椒属植物花椒Zanthoxylom bungeanum Maxim.的干燥成熟种子,是花椒的副产物,我国大部分地区均有分布.在<本草纲目>中最早有记载.该药味苦、辛,性寒,有小毒,具有利水、平喘之功,主治水肿胀满、痰饮喘逆等症~([1,2]).
亮菌多糖的分离纯化

目的 通过醇沉、色谱等分离提取技术对发酵得到的亮菌胞内多糖进行分离纯化,并对纯化的多糖进行结构及部分性质研究.方法 采用水提、醇沉、除蛋白等方法得到亮菌胞内粗多糖,然后通过离子交换色谱、分子筛色谱对粗多糖进行进一步的分离纯化,得到单一多糖.同时采用红外光谱法、紫外光谱法、核磁共振法对该单一多糖进行结构研究,确定其单糖组成及糖链的连接方式.结果 通过去蛋白、醇沉、离子交换色谱和凝胶滤过色谱的方法得到亮菌胞内多糖IPS-B2,该多糖为直链α-D-(1→6)-吡喃型葡聚糖,不含蛋白质、多肽和氨基酸.结论 通过纯化得到了直链α-(1→6-葡聚糖(IPS-B2),该多糖在体内具有较好的抑瘤效果.
五环三萜皂苷生物合成与调控的研究进展

五环三萜皂苷是一类重要的天然产物,具有多种生理活性,临床应用前景诱人,但自然界中,其产量较低.采用分子生物学与蛋白质组学相关知识,通过代谢工程或基因工程进行五环三萜皂苷生物合成的工厂化生产,具有广阔的市场前景.综述了五环三萜皂苷生物合成途径及其调控因子的研究进展,并简要探讨了五环三萜皂苷生物合成的研究方法.
河豚毒素时间分辨荧光免疫分析法的初步研究

河豚毒素(tetrodotoxin,TTX)是一种存在于河豚鱼等生物体内的稳定的麻痹毒素,中毒时造成及呼吸神经中枢麻痹,引起呼吸停止,迅速死亡~([1]).为了控制TTX中毒的发生,应对河豚鱼养殖、销售进行严格管理,并进行TTX的检测.
上市公司年报信息再分类与披露管制新思路

信息的自愿披露可能出现供给不足以及质量低下等"市场失灵"问题,而信息的强制披露同样存在某些信息的披露失灵问题,因此,必须寻找信息披露监管的新思路.本文首次基于信息的经济实质,从信息是否可观测与可核实的角度,将上市公司的年报信息重新分为三类:可观测与可核实信息、可观测与不可核实信息、不可观测与不可核实信息.由于强制规则对可观测与可核实信息的管制完全有效,对可观测与不可核实信息的管制只能中等有效,对不可观测与不可核实信息的管制有效性则非常弱,因此,对三类信息应分别采取不同的披露管制策略.
关于中国企业会计准则与国际财务报告准则持续全面趋同问题

为响应G20峰会提出的建立全球高质量会计准则的倡议,IASB拟对系列准则进行重大修改,包括:将金融工具的分类从现行的四类简化为以摊余成本和公允价值计量两类,并禁止重分类;对公允价值进行重新定义,强调公允价值估值技术必须与市场法、收益法或成本法一致;在财务报表中引入综合收益,并按照营业活动、筹资活动对三张报表进行分类;其他准则的后续修订仍在继续.我国作为新兴市场经济国家,企业经济业务有其特殊性.财政部发布了<中国企业会计准则与国际财务报告准则持续全面趋同路线图(征求意见稿)>,会计理论和实务工作者应当积极行动起来,抓住机遇、迎接挑战,积极参与IASB的准则修订,促进全球统一的高质量会计准则充分考虑新兴市场经济国家的实际,并积极消除中国企业会计准则与国际财务报告准则现存的极少差异,实现会计准则的持续全面趋同.
我国上市公司2008年执行企业会计准则情况分析报告

本文通过对1624家上市公司2008年年度财务报告全面深度分析,揭示了我国宏观经济运行的五个显著特征,从多个角度总结了2008年上市公司执行企业会计准则的情况.经过大量分析表明,我国企业会计准则在上市公司持续有效实施,并得到了国内外广泛认可.文章全面论述了我国应对金融危机在会计准则方面的对策主张,在此基础上提出了关于宏观经济运行的政策建议,以及推动会计行业进一步发展的五项工作计划安排.
从山羊中检测山羊支原体山羊肺炎亚种

山羊支原体山羊肺炎亚种(Mycoplasma capricolum subsp.capripneumonia,Mccp)最早由MacOwan 和Minette于1976年分离,是引起山羊传染性胸膜肺炎(Contagious caprine pleruopneumonia,CCPP)的病原体.~([1-2]).
传统产业转型提升模式探索——以江苏省无锡市滨湖区为例

加快传统产业的转型提升是城市促进经济社会转轨转型的客观需求,也是企业应对市场挑战、增强科技创新和核心竞争能力的必然选择.江苏省无锡市滨湖区在传统产业转型提升过程中取得了先进的经验,本研究通过分析该区传统产业转型的模式,得出了促进产业转型的若干启示,可为其他城市提供一定的借鉴.
蔬菜生产从田头到餐桌的全程质量控制

HACCP是一种质量安全管理体系.利用该体系,建立绿色蔬菜全程安全质量控制体系,确保蔬菜产品在超市销售的安全质量和产品的可追溯性,做到通过条码查询产品的生产全过程.HACCP体系在绿色蔬菜生产中的应用,可为蔬菜生产中的质量安全控制体系的建立和应用提供理论依据.
海藻糖处理对胡萝卜干燥后质量特性的影响

为研究海藻糖浸泡前处理对胡萝卜干燥后质量特性的影响,将胡萝卜分别用质量分数为0、10%、20%和30%的海藻糖浸泡,热风干燥,测定其复水性、质构、色泽和感官质量.结果表明,胡萝卜用20%海藻糖浸泡后,其复水性、质构、色泽和感官质量较好.质量分数为20%海藻糖浸泡前处理是保持干燥胡萝卜片质量的适宜浓度.
微波蛋糕粉配方研究

微波蛋糕具有方便、快捷、卫生、安全等特点,具有极大的市场潜力.通过正交试验确定了适合家庭用微波蛋糕粉的最佳配方:低筋粉100 g,泡打粉6 g,奶粉15 g,单甘酯0.3 g,柠檬酸0.3 g.
太湖流域不同施氮水平对水稻产量和土壤氮素的影响

试验结果表明,太湖地区稻麦两熟制水稻产量与施氮量呈二次曲线关系,可用方程y=-0.00002x~2+0.0095x+9.0384(r=0.993~(**))来描述,当施氮量为237.5 kg/hm~2时,可获得最高理论产量10.17t/hm~2.不同生育时期植株的干物质积累量和氮素的积累量都随着施氮水平的增加而增大;氮肥表观利用率、生理利用率和农学利用率都随着施氮量的增加而降低;高肥处理432 kg/hm~2和540 kg/hm~2成熟期植株干物质积累量和氮素的积累量都较高,但因大量氮素滞留在茎鞘中而导致产量不高.土壤各层全氮含量随着深度的增加而减小;随着施氮量的增加,0～60cm各层土壤全氮含量增大,而60～100 cm各层变化趋势不明显;但当施氮量较高(大于324 kg/hm~2)时,土壤氮素累积与下渗,土壤各层全氮含量提高,易造成氮肥奢侈吸收与氮肥污染.
5X-12型风筛式清选机的研制

介绍了5X-12型风筛式清选机的基本结构、技术性能特点和主要技术参数.所述设备包括振动喂料系统、前风选系统、筛选系统、中间风选系统、后风选系统、出料系统、排杂系统及动力系统等,并重点介绍了振动喂料装置、风选系统、筛体振动装置以及主动力系统的设计和工作原理.其风选系统采用上下正、负压双风系,喂料、出料、居中3次除轻,提高除杂能力;筛选系统设计为上下筛箱等惯量反向配置,降低震动和噪音.小麦种子试验结果为:获选率99%,净度98%,有害杂草籽清除率91%,破损率0.02%,实际生产率为12.6t/h,噪声85 dB(A),粉尘质量浓度6.2 mg/m~3,各项检测指标均达到或超过该机的设计技术指标.
青海海西土-草-畜系统中微量元素的季节变化与盈缺分析

采取实地采样和实验室分析相结合的方法对青海海西地区土-草-畜系统中的5种微量元素(铜、锰、锌、硒、钼)季节变化与盈缺规律进行了研究.结果表明,牧草铜在春、秋季处于缺乏状态,羊被毛铜变化范围在2.99～4.70μg/g之间,处于正常水平;土壤锰含量冬春季、夏季、秋季均低于我国正常土壤锰含量(710μg/g),牧草锰含量在秋季最低,仅为20.85μg/g;土壤不缺锌,牧草锌含量在10.00～42.44μg/g之间,其中秋季牧草锌的含量(10.00μg/g)远远低于NRC推荐绵羊锌需要量;土壤和牧草严重缺硒,绵羊血清中的硒极度缺乏;土壤缺钼,牧草缺钼(0.1872～0.6906μg/g),绵羊血清中钼的含量在0.0257～0.1735μg/ml之间.
腐植酸绿色肥效机理浅析

通过查阅大量有关腐植酸的资料,总结了腐植酸肥料优化土壤结构、保水、保肥、过滤重金属、改善作物品质、防止地表水和地下水污染等绿色肥效性质,就腐植酸的这些机理作了简单分析,为继续开发和利用腐植酸肥料提供科学依据.
马尾藻多糖分离提取及抗氧化活性初步观察

以马尾藻为原料,分别采用水提醇沉、超声波破壁、微波处理、酶法提取4种方法分离提取马尾藻多糖,比较不同提取方法对多糖提取率的影响.通过皮下注射地塞米松或配合马尾藻多糖腹腔注射处理小鼠后,测定胸腺指数、脾脏指数,以及血清中IL-6、TNF-α和胸腺组织匀浆中GSH含量,观察马尾藻多糖对小鼠细胞因子及体内抗氧化能力的影响;通过清除羟自由基、超氧阴离子和抑制红细胞溶血试验观察马尾藻多糖体外抗氧化活性.结果表明,在4种提取方法中,酶法提取率最高.马尾藻多糖处理小鼠后,胸腺中GSH和血清中IL-6、TNF-α的含量随多糖浓度的增加而升高;马尾藻多糖清除羟自由基和对抗过氧化氢溶血的能力随着浓度的增加而升高,且对超氧阴离子具有一定的清除作用.马尾藻多糖具有提高机体细胞因子水平和抗氧化作用,具有开发利用价值.