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134篇 您的检索式:作者名="Teodor"
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1正、负离子碳氟-碳氢表面活性剂混合水溶液的表面活性显示文摘Surface Activities of aqueous mixtures of cationic anionic fluorocarbon hydrocarbon surfactants, F[CF(CF 3)CF 2O] 2CF(CF 3)CONH(CH 2) 3N(C 2H 5) 2CH 3I/C nH 2n+1 COONa (n=7,9,11,13) and F[CF(CF 3)CF 2O] 2CF(CF 3)COONa/C nH 2n+1 N(CH 3) 3Br(n=8,10,12),were investigated.It was showed that,counter charged hydrocarbon surfactants increase the efficiency and in some cases the effect of fluorocarbon surfactants was to decrease surface tension of aqueous solution.However,surface activity of fluorocarbon surfactants is decreased if the length of hydrocarbon chains is longer than that of fluorocarbon chains.肖进新 罗妙宣 胡昌明 Teodor Dehelean 2000化学研究与应用2000,12,3:21
2Nonalcoholic fatty liver disease, metabolic risk factors, and hepatocellular carcinoma: An open question显示文摘Non-alcoholic liver disease(NAFLD) defines liver abnormalities ranging from simple steatosis to nonalcoholic steatohepatitis with or without cirrhosis development, occurring in the absence of significant alcohol consumption, use of teratogenic medication, or hereditary disorders.The association between NAFLD and metabolic syndrome is well documented and widely recognized.Obesity, type 2 diabetes mellitus(T2DM), and dyslipidemia are the most common metabolic risk factors associated with NAFLD.Among the components of metabolic syndrome, current evidence strongly indicates obesity and diabetes as hepatocellular carcinoma(HCC) risk factors.There is also growing evidence that suggests an increased risk of HCC in NAFLD patients, even surpassing other etiologies in some high-income countries.Epidemiologic data demonstrate a parallel rise in prevalence of obesity, diabetes, NAFLD, and HCC.As obesity and its related diseases have steadily afflicted larger populations, HCC incidence is expected to increase in the future.Pathophysiologic mechanisms that underlie NAFLD development and subsequent progression to nonalcoholic steatohepatitis and cirrhosis(insulin resistance and hyperinsulinemia, oxidative stress, hepatic stellate cell activation, cytokine/adipocytokine signaling pathways, and genetic and environmental factors) appear to play a significant role in the development of NAFLD-related HCC.However, a comprehensive view of molecular mechanisms linking obesity, T2 DM, and NAFLD-related HCC, as well as the exact sequence of molecular events, is still not understood in its entirety.Good-quality data are still necessary, and efforts should continue towards better understanding the underlying carcinogenic mechanisms of NAFLD-related HCC.In this paper, we aimed to centralize the most important links supporting these relationships, focusing on obesity, T2 DM, and NAFLD-related HCC, as well as point out the major gaps in knowledge regarding the underlying molecular mechanisms behind them.Letitia Adela Maria Streba Cristin Constantin Vere Ion Rogoveanu Costin Teodor Streba 2015World Journal of Gastroenterology2015,21,14:15
3Contrast-enhanced ultrasonography parameters in neural network diagnosis of liver tumors显示文摘AIM:To study the role of time-intensity curve(TIC) analysis parameters in a complex system of neural networks designed to classify liver tumors.METHODS:We prospectively included 112 patients with hepatocellular carcinoma(HCC)(n = 41),hypervascular(n = 20) and hypovascular(n = 12) liver metastases,hepatic hemangiomas(n = 16) or focal fatty changes(n = 23) who underwent contrast-enhanced ultrasonography in the Research Center of Gastroenterology and Hepatology,Craiova,Romania.We recorded full length movies of all contrast uptake phases and post-processed them offline by selecting two areas of interest(one for the tumor and one for the healthy surrounding parenchyma) and consecutive TIC analysis.The difference in maximum intensities,the time to reaching them and the aspect of the late/portal phase,as quantified by the neural network and a ratio between median intensities of the central and peripheral areas were analyzed by a feed forward back propagation multi-layer neural network which was trained to classify data into five distinct classes,corresponding to each type of liver lesion.RESULTS:The neural network had 94.45% training accuracy(95% CI:89.31%-97.21%) and 87.12% testing accuracy(95% CI:86.83%-93.17%).The automatic classification process registered 93.2% sensitivity,89.7% specificity,94.42% positive predictive value and 87.57% negative predictive value.The artificial neural networks(ANN) incorrectly classified as hemangyomas three HCC cases and two hypervascular metastases,while in turn misclassifying four liver hemangyomas as HCC(one case) and hypervascular metastases(three cases).Comparatively,human interpretation of TICs showed 94.1% sensitivity,90.7% specificity,95.11% positive predictive value and 88.89% negative predictive value.The accuracy and specificity of the ANN diagnosis system was similar to that of human interpretation of the TICs(P = 0.225 and P = 0.451,respectively).Hepatocellular carcinoma cases showed contrast uptake during the arterial phase followed by wash-out in the portal and first seconds of the late phases.For the hypovascular metastases did not show significant contrast uptake during the arterial phase,which resulted in negative differences between the maximum intensities.We registered wash-out in the late phase for most of the hypervascular metastases.Liver hemangiomas had contrast uptake in the arterial phase without agent wash-out in the portallate phases.The focal fatty changes did not show any differences from surrounding liver parenchyma,resulting in similar TIC patterns and extracted parameters.CONCLUSION:Neural network analysis of contrastenhanced ultrasonography-obtained TICs seems a promising field of development for future techniques,providing fast and reliable diagnostic aid for the clinician.Costin Teodor Streba Mihaela Ionescu Dan Ionut Gheonea Larisa Sandulescu Tudorel Ciurea Adrian Saftoiu Cristin Constantin Vere Ion Rogoveanu 2012World Journal of Gastroenterology2012,18,32:11
4Psychosocial stress and liver disease status显示文摘'Psychosocial stress' is an increasingly common concept in the challenging and highly-demanding modern society of today. Organic response to stress implicates two major components of the stress system, namely the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system. Stress is anamnestically reported by patients during the course of disease, usually accompanied by a decline in their overall health status. As the mechanisms involving glucocorticoids and catecholamines have been deciphered, and their actions on immune cell function deeper understood, it has become clear that stress has an impact on hepatic inflam-matory response. An increasing number of articles have approached the link between psychosocial stress and the negative evolution of hepatic diseases. This article reviews a number of studies on both human populations and animal models performed in recent years, all linking stress, mainly of psychosocial nature, and the evolution of three important liver-related pathological entities: viral hepatitis, cirrhosis and hepatocellular carcinoma.Cristin Constantin Vere Costin Teodor Streba Letitia Maria Streba Alin Gabriel Ionescu Felix Sima 2009World Journal of Gastroenterology2009,15,24:7
5Proportional fuzzy feed-forward architecture control validation by wind tunnel tests of a morphing wing显示文摘In aircraft wing design,engineers aim to provide the best possible aerodynamic performance under cruise flight conditions in terms of lift-to-drag ratio.Conventional control surfaces such as flaps,ailerons,variable wing sweep and spoilers are used to trim the aircraft for other flight conditions.The appearance of the morphing wing concept launched a new challenge in the area of overall wing and aircraft performance improvement during different flight segments by locally altering the flow over the aircraft's wings.This paper describes the development and application of a control system for an actuation mechanism integrated in a new morphing wing structure.The controlled actuation system includes four similar miniature electromechanical actuators disposed in two parallel actuation lines.The experimental model of the morphing wing is based on a full-scale portion of an aircraft wing,which is equipped with an aileron.The upper surface of the wing is a flexible one,being closed to the wing tip;the flexible skin is made of light composite materials.The four actuators are controlled in unison to change the flexible upper surface to improve the flow quality on the upper surface by delaying or advancing the transition point from laminar to turbulent regime.The actuators transform the torque into vertical forces.Their bases are fixed on the wing ribs and their top link arms are attached to supporting plates fixed onto the flexible skin with screws.The actuators push or pull the flexible skin using the necessary torque until the desired vertical displacement of each actuator is achieved.The four vertical displacements of the actuators,correlated with the new shape of the wing,are provided by a database obtained through a preliminary aerodynamic optimization for specific flight conditions.The control system is designed to control the positions of the actuators in real time in order to obtain and to maintain the desired shape of the wing for a specified flight condition.The feasibility and effectiveness of the developed control system by use of a proportional fuzzy feed-forward methodology are demonstrated experimentally through bench and wind tunnel tests of the morphing wing model.Michel Joёl Tchatchueng Kammegne Ruxandra Mihaela Botez Lucian Teodor Grigorie Mahmoud Mamou Youssef Mebarki 2017Chinese Journal of Aeronautics2017,30,2:6
6COX-2 as a potential biomarker and therapeutic target in melanoma显示文摘With a constantly increasing incidence,cutaneous melanoma has raised the need for a better understanding of its complex microenvironment that may further guide therapeutic options.Melanoma is a model tumor in immuno-oncology.Inflammation represents an important hallmark of cancer capable of inducing and sustaining tumor development.The inflammatory process also orchestrates the adaptative immunosuppression of tumor cells that helps them to evade immune destruction.Besides its role in proliferation,angiogenesis,and apoptosis,cyclooxygenase-2(COX-2)is a well-known promoter of immune suppression in melanoma.COX-2 inhibitors are closely involved in this condition.This review attempts to answer two controversial questions:is COX-2 a valuable prognostic factor?Among all COX-2 inhibitors,is celecoxib a suitable adjuvant in melanoma therapy?Diana Valentina Tudor Ioana Baldea Mihai Lupu Teodor Kacso Eniko Kutasi Andreea Hopartean Roland Stretea Adriana Gabriela Filip 2020Cancer Biology & Medicine2020,17,1:6
7Environmental engineering of transition metal dichalcogenide optoelectronics显示文摘Trevor LaMountain Erik J. Lenferink Yen-Jung Chen Teodor K. Stanev Nathaniel P. Stern 2018Frontiers of physics2018,13,4:3
8基于细胞的生物传感器:用石英晶体微天平方法研究膜蛋白相互作用显示文摘在药物开发早期选择最优的候选目标物对于避免后期药物研发失败是至关重要的。Attana200细胞生物传感器能检测目标物在生物基质条件下的无标、全实时动力学情况,提供一个信息丰富的生物学相关的测量方法。细胞能在传感器表面生长,和传统传感器一样通过连续流引入相互作用的生物分子。该仪器还兼容标准生物传感器表面,而且可用于比较键合的纯化目标和相互作用的细胞。Karin ELOVSSON Teodor AASTRUP 2011生命科学仪器2011,9,4:2
9Women in dental surgeries: reproductive hazards in occupational exposure to metallic mercury显示文摘Radzislaw Sikorski Teodor Juszkiewicz Tomasz Paszkowski Teresa Szprengier-Juszkiewicz 1987International Archives of Occupational and Environmental Health1987,,6:2
10Beyond 11% Efficiency: Characteristics of State‐of‐the‐Art Cu2ZnSn(S,Se)4 Solar Cells显示文摘Teodor K. Todorov Jiang Tang Santanu Bag Oki Gunawan Tayfun Gokmen Yu Zhu David B. Mitzi 2012Adv. Energy Mater2012,,:2
11Clinical features and course of bacterial meningitis in children显示文摘Juganariu G Miftode E Teodor D 2012Rev Med Chir Soc Med Nat Iasi2012,116,3:1
12Service network design in freight transportation显示文摘Teodor Gabriel Crainic 2000European Journal of Operational Research2000,122,:1
13Dynamic and stochastic models for the allocation of empty containers显示文摘TEODOR GC MICHEL G PIERRE D 1992Journal of the Operational Research Society1992,41,:1
14Giant magneto resistance-based eddy-current sensor显示文摘Teodor Dogaru Smith Stuart T 2001IEEE Transactions on Magnetics2001,37,:1
15Service network design in freight transporta- tion显示文摘Teodor Gabriel Crainic 2000European Journal of Operational Research2000,122,2:1
16Design of fault detection for a hydraulic looper using dynamic neural networks 显示文摘Teodor Marcu Birgit Koppen-Seliger Reinhard Stiicher 2008Control Engineering Practice (S0967-0661)2008,16,2:1
17A comparison of rotary regenerator theory and experimental results for an air heater for a thermal power plant显示文摘Teodor Skiepko 2004IEEE Experimental Thermal and Fluid Science2004,45,3:1
18Design of Fault Detection for a Hydraulic Looper Using Dynamic Neural Network 显示文摘TEODOR M BIRGIT K S REINHARD S 2008Control Engineering Practice2008,16,:1
19Advanced freight transportation systems for congested urban areas显示文摘G C TEODOR N RICCIARDI 2004Transportation Research Part C: Emerging Technologies2004,12,2:1
20Species diversity of Basidiomycota显示文摘Fungi are eukaryotes that play essential roles in ecosystems.Among fungi,Basidiomycota is one of the major phyla with more than 40,000 described species.We review species diversity of Basidiomycota from five groups with different lifestyles or habitats:saprobic in grass/forest litter,wood-decaying,yeast-like,ectomycorrhizal,and plant parasitic.Case studies of Agaricus,Cantharellus,Ganoderma,Gyroporus,Russula,Tricholoma,and groups of lichenicolous yeast-like fungi,rust fungi,and smut fungi are used to determine trends in discovery of biodiversity.In each case study,the number of new species published during 2009–2020 is analysed to determine the rate of discovery.Publication rates differ between taxa and reflect different states of progress for species discovery in different genera.The results showed that lichenicolous yeast-like taxa had the highest publication rate for new species in the past two decades,and it is likely this trend will continue in the next decade.The species discovery rate of plant parasitic basidiomycetes was low in the past ten years,and remained constant in the past 50 years.We also found that the establishment of comprehensive and robust taxonomic systems based on a joint global initiative by mycologists could promote and standardize the recognition of taxa.We estimated that more than 54,000 species of Basidiomycota will be discovered by 2030,and estimate a total of 1.4–4.2 million species of Basidiomycota glob-ally.These numbers illustrate a huge gap between the described and yet unknown diversity in Basidiomycota.Mao-Qiang He Rui-Lin Zhao Dong-Mei Liu Teodor T.Denchev Dominik Begerow Andrey Yurkov Martin Kemler Ana M.Millanes Mats Wedin A.R.McTaggart Roger G.Shivas Bart Buyck Jie Chen Alfredo Vizzini Viktor Papp Ivan V.Zmitrovich Naveed Davoodian Kevin D.Hyde 2022Fungal Diversity2022,,3:1
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