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Climatic and fire determinants of early life-history stages in the Mediterranean shrub Cistus albidus

Journal of Plant Ecology 2020年第1期13卷 3-11页

作者： Sandra Saura-mas Anna Saperas Franciso Lloret Center for Ecological Research and Forestry Applications(CREAF) E 08193 BellaterraBarcelonaSpain Unit of Ecology Department of Animal and Plant Biology and EcologyAutonomous University of BarcelonaE-08193 BellaterraBarcelonaSpain

Aims Cistus albidus reproductive traits have been studied on typical Mediterranean shrublands along a water availability gradient in Northeastern Iberian *** of this species is known to be highly favoured by ***,Mediterranean species are particularly dependent on water ***,we establish the hypothesis that in addition to fire disturbance,seedling recruitment in this Mediterranean seeder will be improved in drought-induced episodes resulting in generalized canopy *** Individuals of several populations of *** were collected and the size,weight and number of fruits and seeds were *** tests were also carried out on five pre-germination treatments:seeds’exposure to heat shock,imbibition,two cycles of imbibition/desiccation and the combination of heat shock and imbibition and imbibition/desiccation ***,the number of seedlings after a drought event was surveyed in the field and correlated with canopy *** findings Our study shows the variability of the *** reproductive traits,such as germination rate or fruit production,along the water availability *** variability resulted in a decrease in fruit production but an increase in successful germination under drier *** albidus seeds increased germination with heat,demonstrating their ability to successfully establish after ***,recruitment was not exclusively fire dependent since seedling establishment was higher under *** canopies that had collapsed after the extreme ***,adult density increased *** die-off and mortality,as well as seedling *** results suggest that this species exhibits a trade-off between different reproductive outcomes(*** production ***),which in turn is determined by *** study also provides evidence of how intra-specific competition,climate,particularly drought events and fire disturbance,can determine th

关键词： seeder germination Cistus albidus life history Mediterranean fire drought resilience

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Ultrastructural changes in hepatocytes after taurinetreatment in CCl_4 induced liver injury

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World Journal of Gastroenterology 2008年第31期14卷 4897-4902页

作者： Ilker Tasci Nuket mas Mehmet Refik mas Murvet Tuncer Bilgin Comert Department of Internal Medicine Gulhane School of Medicine Ankara 06018 Turkey Department of Anatomy Kocatepe University Medical Faculty Afyon 03060 Turkey Department of Anatomy Hacettepe University Medical Faculty Ankara 06018 Turkey

AIM: To search the organelle based changes in hepatocytes after taurine treatment in experimental liver fi brosis induced by CCl_4 administration. MEthODS: thirty rats were divided into two groups. Group 1 (n = 15) was injected with CCl_4 plus taurine and Group 2 (n = 15) with CCl_4 plus saline for 12 wk. At the end of 12th wk, mitochondria, rough and smooth endoplasmic reticulum, and nuclei of hepatocytes were evaluated using a scoring system. the results were compared with histopathological f indings, as well. RESULTS: Taurine treatment reduced fi brosis scores signifi cantly as compared to placebo. Organelle injury scores decreased signifi cantly with taurine treatment. Ultrastructural and histopathological scores in both groups were in strong correlation (r = 0.931 for CCl_4 plus taurine and r = 0.899 for CCl_4 plus saline group). CONCLUSION: Organelle based transmission electron microscopy fi ndings can reflect successfully histological results as well as tissue healing in hepatocytes from hepatotoxin-induced liver fi brosis.

关键词： Taurine Liver fibrosis Hepatocyte Ultrastructure

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Room-Temperature Synthesis of Fe-containing Mesoporous Silica

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Chinese Chemical Letters 1996年第11期7卷 1057-1058页

作者： Yuan, ZY Chen, th Wang, JZ Li, HX NANKAI UNIV DEPT CHEMTIANJIN 300071PEOPLES R CHINA

A Fe-containing mesoporous silica has been synthesized at room temperature using alkylamine as templating surfactant; XRD, IR, ESR and Si-29 mas NMR spectra provided evidence of the presence of framework and non-frame... 详细信息

关键词： Fe Room-Temperature Synthesis of Fe-containing Mesoporous Silica

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Statistical techniques in business and economics / 11th ed.

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丛书名： CFA系列

2002年

作者： Douglas A. Lind William G. Marchal Robert D. mas

来源：畅想之星图书光盘版（南... 评论

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白介素12B的多态性对HCV感染后自然康复和治疗诱导康复的影响

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世界核心医学期刊文摘（胃肠病学分册） 2005年第2期1卷 59-60页

作者： Mueller T. mas-Marques A. Sarrazin C. 程欣

Interleukin-12 (IL-12) governs the th1-type immune response, affecting the spontaneous and treatment-induced recovery from HCV-infection. We investigated whether the IL12B polymorphisms within the promoter region (4 bp insertion/dele tion) and the 3-UTR (1188-A/C), which have been reported to influence IL-12 s ynthesis, are associated with the outcome of HCV infection. We analyzed 186 indi viduals with spontaneous HCV clearance, 501 chronically HCV infected patients, a nd 217 healthy controls. IL12B 3-UTR and promoter genotyping was performed by T aqman-based assays with allele-specific oligonucleotide probes and PCR-based allele-specific DNA amplification, respectively. the proportion of IL12B pro moter and 3-UTR genotypes did not differ significantly between the different cohorts. However, HCV genotype 1-infected patients with high baseline viremia c arrying the IL12B3-UTR 1188-Callele showed significantly higher sustained viro logic response (SVR) rates (25.3%vs. 46%vs. 54.5%for A/A, A/C and C/C) due to reduced relapse rates (24.2%vs. 12%vs. zero %for A/A, A/C and C/C). IL12B 3 -UTR 1188-C-allele carriers appear to be capable of responding more efficient ly to antiviral combination therapy as a consequence of a reduced relapse rate. No association of IL12B polymorphisms and self-limited HCV infection could be d emonstrated.

关键词：多态性 HCV感染等位基因特异性丙型肝炎病毒持续病毒学应答自限性启动子区域扩增技术携带者高病毒血症

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CR与普通摄影曝光剂量和剂量当量的比较

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实用放射学杂志 2007年第1期23卷 106-108页

作者：范志刚解放军第359医院放射科江苏镇江212001

目的比较CR与普通摄影曝光剂量和受照剂量当量大小。方法通过热释光测量计、线对卡等工具,对中速屏-片、感绿屏-片及IP板3种影像载体的曝光剂量和剂量当量均值进行检测与比较。结果显示2.0L.P/mm时,IP板曝光剂量只有中速屏-片的5%、感绿... 详细信息

目的比较CR与普通摄影曝光剂量和受照剂量当量大小。方法通过热释光测量计、线对卡等工具,对中速屏-片、感绿屏-片及IP板3种影像载体的曝光剂量和剂量当量均值进行检测与比较。结果显示2.0L.P/mm时,IP板曝光剂量只有中速屏-片的5%、感绿屏-片的33%,剂量当量均值是中速屏-片的3%、感绿屏-片的35%。而显示4.0L.P/mm时,IP板曝光剂量接近中速屏-片的200%、感绿屏-片的950%,剂量当量均值是中速屏-片的180%、感绿屏-片的1110%。在2.5~3.2L.P/mm范围内,IP板的曝光剂量分别是中速屏-片的50%~75%、感绿屏-片的220%~290%,剂量当量均值又分别是中速屏-片的37%~66%、感绿屏-片的190%~270%。结论在2.5~3.2L.P/mm内,CR的曝光剂量和剂量当量均值比中速屏-片低约1/2~3/4倍mas、1/3~2/3倍mSv,但比感绿屏-片高约2~3倍mas、2~3倍mSv。在这一范围内投照,均可获得优质的影像。

关键词：计算机X线摄影剂量 X线摄影术

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三颗类星体的亚毫角秒结构

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天体物理学报 2000年第4期20卷 349-354页

作者：苏步美李永生 Bth L. B. 高亦菲中国科学院云南天文台昆明650011 Center for Imaping Technologies

使用全球ＶＬＢＩ网在１．３ｃｍ波段对三颗类星体０４２０－０１４、０７４８＋１２６和２２５１＋１５８（３Ｃ４５４．３）进行了观测，获得了这三个类星体的亚毫角秒分辨率的混杂图，给出了类星体核区内的亮度分布．通过用高斯模... 详细信息

使用全球ＶＬＢＩ网在１．３ｃｍ波段对三颗类星体０４２０－０１４、０７４８＋１２６和２２５１＋１５８（３Ｃ４５４．３）进行了观测，获得了这三个类星体的亚毫角秒分辨率的混杂图，给出了类星体核区内的亮度分布．通过用高斯模型对观测数据进行拟合，得到了组成它们的各个子源的参数．类星体２２５１＋１５８呈现出核－喷流结构，核区沿着ＰＡ～－１３０°方向拉长，喷流呈弯曲状．１９９２．９历元的观测展现了２２５１＋１５８处于一次大爆发，并伴随一系列相继出现的小爆发的情景．最强子源的积分流量密度为４．１１Ｊｙ（占探测到的总流量的６７％），主要集中在０．１６ × ０．０１ｍａｓ的区域内，可能由于多普勒增亮效应造成高达２．６×１０１２的亮温度．

关键词：类星体射电发射亚毫角秒结构

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