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171篇 您的检索式:作者名="Franz F"
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1三水盆地古近系湖相沉积岩的氧、碳同位素地球化学记录及其环境意义显示文摘三水盆地古近系莘庄组顶部至土布心组红岗段的全岩碳酸盐稳定同位素分析结果表明其形成期间经历了多次环境变迁。根据碳酸盐氧、碳同位素比值及其相互关系的变化 ,可识别三次海水入侵期。其时δ18O值大幅度向正值漂移。而由于受有机质降解的影响 ,相应时期的δ13 C均表现为低值。在不直接受海洋影响的湖相沉积阶段 ,δ18O与δ13 C的相关程度虽然未达到典型的封闭型湖泊水平 ,但仍呈现一定的正相关变化 (r =0 .6 5 ) ,表明其湖水滞留时间较长。而频繁出现的石膏薄层沉积也指示湖盆的封闭性较好。这些均表明这一时期的三水盆地可能是一周期性封闭型湖泊。其稳定同位素组成主要受制于蒸发量 /降雨量平衡的变化。而δ13 C比值往往还受有机质活动的控制 ,更多的是反映有机质生产力。刘春莲 Franz T Fürsich 白雁 杨小强 李国强 2004沉积学报2004,22,1:27
2三水盆地古近系(土布)心组黑色页岩中黄铁矿的形成及其控制因素显示文摘黄铁矿是富有机质沉积的特征矿物。根据TOC/S、TOC/DOP、S/Fe关系以及S-TOC-Fe多重线性回归分析结果对三水盆地古近系土布心组红岗段黑色页岩中沉积黄铁矿的形成及其控制因素进行了分析。土布心组红岗段黑色页岩的黄铁矿有成岩黄铁矿和同生黄铁矿两种成因组分。红岗段下部(亚段A)有机碳含量普遍较低,底部水体以弱氧化条件为主,硫酸盐还原作用发生于沉积物/水界面以下,黄铁矿为成岩成因,其形成主要受有机质的限制。红岗段中上部(亚段B和C)的沉积条件变化频繁,其有机碳含量变化幅度大。富有机质(TOC>4%)岩层形成于缺氧的底部水体条件下。水体中可含H2S,碎屑铁矿物在埋藏之前即与之在水体中反应形成同生黄铁矿。这一过程不受有机质的限制,而是受活性铁与H2S接触时间的限制。同时,由于大量淡水输入导致硫酸盐浓度的降低,从而对硫化物形成有一定的限制作用。对于低有机质(TOC<4%)样品,黄铁矿由同生和成岩组分组成。其中以成岩黄铁矿为主,其形成过程主要受有机质限制,而同生黄铁矿受铁矿物与H2S接触时间的限制。刘春莲 董艺辛 车平 Franz T Fürsich 石贵勇 陈亮 严伟术 2006沉积学报2006,24,1:17
3Late Quaternary palaeoenvironmental changes documented by microfaunas and shell stable isotopes in the southern Pearl River Delta plain,South China显示文摘Ahigh resolution study of sediments,microfaunas(ostracods and foraminifers),and stable isotopes of ostracod shells from core PRD05,sampled from the Da’ao plain of the Pearl River Delta,provides new data about palaeoenvironmental changes during the Late Quaternary.The basal fluvial gravelly sediments of the core,representing the lowest deposits of the Quaternary at the core site,were possibly formed prior to the transgression associated with the last interglacial stage.This fluvial setting changed into a marginal marine setting during the last interglacial stage,any record of calcareous fossils were destroyed by subsequent dissolution during the last glacial phase,when the upper part of the deltaic sediments experienced subaerial oxidation,indicated by a mottled clay layer in the core.The postglacial sealevel rise in the South China Sea began at16,700 cal yr B.P.During the first phase of sea-level rise(from ~16,700 to 10,100 cal yr B.P.),a swamp environment developed at the core site.At ~10,100 cal yr B.P.,marine waters intruded onto the Da’ao plain and reached the core site through the Modaomen channel.This timing was earlier than in other parts of the Pearl River Delta.Since then,a semi-enclosed estuarine environment developed and was maintained until ~5560 cal yr B.P.During this transgressive interval,short-term environmental fluctuations can be recognized based on microfauna and shell geochemical data.From ~10,100 to 8630 cal yr B.P.,the sea-level rose,which was followed by a fall from ~8630 to 8520 cal yr B.P.An expanded transgression occurred between ~8520 and 7900 cal yr B.P.The time intervals from ~8520 to 8200 cal yr B.P.and from ~8080 to 7900 cal yr B.P.were marked by peak transgression.From ~7900 to 5560 cal yr B.P.,the core site generally showed a reduced marine influence and enhanced freshwater input.A fluvial environment developed from ~5560 to 3100 cal yr B.P.,and was succeeded by an alluvial plain setting.Liu Chunlian Franz T. Fürsich Wu Jie Dong Yixin Yang Tingting Yin Jian 2013Journal of Palaeogeography2013,2,4:8
4Interbasinal marker intervals——A case study from the Jurassic basins of Kachchh and Jaisalmer, western India显示文摘The Kachchh Basin and the Jaisalmer Basin are two neighboring Mesozoic sedimentary basins at the western margin of the Indian craton. The Jurassic succession of the Kachchh Basin is more complete and more fossiliferous than that of the Jaisalmer Basin. Consequently, intrabasinal correlation of the sedimentary units has been possible in the Kachchh Basin, but not in the Jaisalmer Basin. However, some marker beds existing in the Kachchh Basin can be recognized also in the Jaisalmer Basin. Ammonite evidence shows that they are time-equivalent. The following four units form marker intervals in both basins: (1) the pebbly rudstone unit with Isastrea bernardiana and Leptosphinctes of the Kaladongar Formation (Kachchh Basin) and the Isastrea bernardiana-bearing rudstone of the Jaisalmer Formation (Jaisalmer Basin) both represent transgressive systems tract deposits dated as Late Bajocian; (2) bioturbated micrites with anomalodesmatan bivalves within the Goradongar Yellow Flagstone Member (Kachchh Basin) and bioturbated units in the Fort Member (Jaisalmer Basin) represent maximum flooding zone deposits of the Middle to Late Bathonian; (3) trough-crossbedded, sandy packto grainstones of the Raimalro Limestone Member (Kachchh Basin) and the basal limestone-sandstone unit of the Kuldhar section of the Jaisalmer Formation (Jaisalmer Basin) correspond to Late Bathonain transgressive systems tract deposits; and (4) ferruginous ooid-bearing carbonates with hardgrounds of the Dhosa Oolite member (Kachchh Basin) and the middle part of the Jajiya Member (Jaisalmer Basin) are Oxfordian transgressive systems tract deposits. The fact that in both basins similar biofacies prevailed during certain time intervals demonstrates a common control of their depositional history. As the two basins represent different tectonic settings, the most likely controlling factors were the relative sea-level changes produced by eustatic processes, a common subsidence history of the northwestern margin of the Indian craton, and the paleoclimate.PANDEY Dhirendra Kumar FüRSICH Franz Theodor 2009Science China Earth Sciences2009,52,12:3
5Digital templating in total hip arthroplasty:Additional anteroposterior hip view increases the accuracy显示文摘AIM To analyze planning total hip arthroplasty(THA) with an additional anteroposterior hip view may increases the accuracy of preoperative planning in THA.METHODS We conducted prospective digital planning in 100 consecutive patients: 50 of these procedures were planned using pelvic overview only(first group), and the other 50 procedures were planned using pelvic overview plus antero-posterior(a.p.) hip view(second group). The planning and the procedure of each patient were performed exclusively by the senior surgeon. Fifty procedures with retrospective analogues planning were used as the control group(group zero). After the procedure, the planning was compared with the eventually implanted components(cup and stem). For statistic analysis the x^2 test was used for nominal variables and the t test was used for a comparison of continuous variables.RESULTS Preoperative planning with an additional a.p. hip view(second group) significantly increased the exact component correlation when compared to pelvic overview only(first group) for both the acetabular cup and the femoral stem(76% cup and 66% stem vs 54% cup and 32% stem). When considering planning ± 1 size, the accuracy in the second group was 96%(48 of 50 patients) for the cup and 94% for the stem(47 of 50patients). In the analogue control group(group zero), an exact correlation was observed in only 1/3 of the cases.CONCLUSION Digital THA planning performed by the operating surgeon and based on additional a.p. hip view significantly increases the correlation between preoperative planning and eventual implant sizes.Sophia K Stigler Franz J Müller Sebastian Pfaud Michael Zellner Bernd Füchtmeier 2017World Journal of Orthopedics2017,8,1:3
6Assessing hydrological and provisioning ecosystem services in a case study in Western Central Brazil显示文摘Introduction:Current land use in the Federal District,Western Central Brazil,causes problems related to the water supply which are linked to the regulation of ecosystem services(ES).In scope of an Integrated Water Resources Management concept,we further developed the web-based planning support tool GISCAME for the Pipiripau river basin case study.Methods:We introduced analyses on ecosystem potentials in the raster-based tool to assess,in a spatially explicit manner,the scenario impact on water purification,sediment retention,water retention,and provision of food and fodder in order to identify potential pathways for conserving water resources.To demonstrate the method,we assess ES depending on a number of land use/land cover change(LULCC)scenarios.Results:We found that a considerable increase of water purification and sediment retention is difficult to achieve with realistic small scale LULCC,mainly because in areas with a low potential to provide hydrological ES and thus with a high demand for sustainable land use,such as native Savanna(Cerrado)and natural forests(Mata),favorable land uses were often already existing.We observed synergies in the response of regulating hydrological ES to LULCC but at the same time also trade-offs with provision of food and fodder.Conclusions:Our findings suggest that further degradation and loss of Cerrado and Mata must be avoided and their restoration should be promoted in order to safeguard water resources.We suggest that restoration measures should be focused on arable land located at steep slopes near surface waters to effectively increase hydrological ES through the marginal reduction of provision services.Lars Koschke Carsten Lorz Christine Fürst Tobias Lehmann Franz Makeschin 2014Ecological Processes2014,3,1:2
7Soil-air exchange of nitric oxide: An overview of processes, environmental factors, and modeling studies显示文摘J?rg Ludwig Franz X. Meixner Bernhard Vogel Jochen F?rstner 2001Biogeochemistry2001,,3:2
8Artificial extracellular matrices composed of collagen 1 and high-snliated hyaluronan promote phenotypic and functional modulation of human pro-inflammatory MI macrophages 显示文摘FRANZ S ALLENSTE1N F KAJAHN J et ol 2013Acta Biomater2013,9,3:1
9Hofreither,Phasing out of environmentally harmful sidies:Consequences of the 2003 CAP reform显示文摘Erwin Schmida Franz Sinabell Markus F 2003Ecological Econpmics2003,,:1
10Electroluminescence of silicon nanocrystals in MOS structures显示文摘Franzò G Irrera A Moreira E C Miritello M Iacona F Sanfilippo D Di Stefano G Fallica P G Priolo F 0,,:1
11X-ray image intensitiers : image quality and possibilities for enhancement 显示文摘FENNER E FRANZ F GUDDEN F 1972Advances in Electron and Electronic Physics1972,,:1
12Optical gain in silicon nanocrystals显示文摘Pavcsi L Dal Negro L Mazzoleni C Franzò G Priolo F 0,,6811:1
13The assessment of airborne microorganisms in large-scale composting facilities and their immediate surroundings显示文摘Franz F Reinthaler Egon Marth Ute Eibel 1997Aerobiologia1997,13,:1
14Urban contamination of the Chicago coastal Lake Michigan atmosphere by PCBs and PAHs during AEOLOS显示文摘 Zhang H Franz T P 1997Environ Sci Technol1997,31,7:1
15Composition and density model of the continental crust at an active continental margin- The Central Andes between 21° and 27° S 显示文摘Lucassen F Becchio R Harmon R Kasemann S Franz G Trumbull R Wilke H-G Romer R L Dulski P 2001Tectono-physics2001,341,14:1
16Transient behavior of the strong violet electroluminescence of Ge-implanted SiO2 layers显示文摘Rebohle L Gebel T Von Botany J Skorupa W Helm M Pacifici D Franzò G Priolo F 0,,:1
17The persistent vegetative state after closed head injury: clinical and magnetic resonance imaging findings in 42 patients显示文摘 FRANZ G AICHNER F 1998J Neurosurg1998,88,5:1
18Weak D alleles express distinct phenotypes显示文摘Franz F Alexander F Birgit L 2000Blood2000,95,8:1
19Wald criteria for jointly testing equality and inequality显示文摘Kodde D A Franz F C 1986Econometrica1986,54,:1
20Mechano electrical feed back underlying arrhythmias: theatrial fibrillation case显示文摘Franz MR Bode F 2003Prog Biophy Molbioi2003,82,:1
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