|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Structure-activity relationship in water-gas shift reaction over gold catalysts supported on Y-doped ceria显示文摘The utilization of pure hydrogen as an energy source in fuel cells gave rise to renewed interest in developing active and stable water-gas shift catalysts. Gold catalysts have proven to be very efficient for water-gas shift reaction at low temperature. The aim of the present study was to investigate the effect of:(i) different preparation methods(impregnation and coprecipitation) to obtain a modified ceria support,and(ii) the amount of Y_2 O_3(1.0 wt%, 2.5 wt%, 5.0 wt% and 7.5 wt%) as dopant on the water-gas shift activity of Au/CeO_2 catalysts. An extended characterization by means of S_(BET), XRD, HRTEM/HAADF, FTIR,H_2-TPR and CO-TPR measurements in combination with careful evaluation of the catalyst behavior allowed to shed light on the parameters governing the water-gas shift activity. The catalysts show very high activity(>90% CO conversion) in the temperature range 180-220 ℃,with a slightly better performance of the gold catalysts on supports prepared by impregnation. The decreased activity with increasing Y_2 O_3 concentration is related to the hindering of oxygen mobility due to ordering of surface oxygen vacancies in vicinity of segregated Y^(3+). The effect of catalyst pre-treatments and the stability of the best performing samples were examined as well. | Tatyana Tabakova Lyuba Ilieva Ivan Ivanov Maela Manzoli Rodolfo Zanella Petya Petrova Zbigniew Kaszkur | 2019 | Journal of Rare Earths2019，37，4： | 4 |
| 2 | Grinding in an air classi tier mill -Part I: Characterisation of the one-phase flow显示文摘 | Petya Toneva Philipp Epple Michael Breuer | 2011 | Powder Technology2011，211，4： | 1 |
| 3 | Grinding in an air classi tier mill - Part II: Characterisation of the two-phase flow显示文摘 | Petya Toneva Karl-Ernst Wirth Wolfgang Peukert | 2011 | Powder Technology2011，211，4： | 1 |
| 4 | Im-munomodulatory functions of leflunomide:inhibition of T helper (Th) lcell activation and promotion of th2differentiation显示文摘 | Petya Dimitrova Alla Skapenko Rudolf Schleyerbach | 2001 | Arthritis & Rheuma-tism2001，44，9： | 1 |
| 5 | Tyrosine Kinase Inhibitor Tyrphostin AG490 Retards Chronic Joint Inflammation in Mice显示文摘 | Valeriya Gyurkovska Tsvetanka Stefanova Petya Dimitrova Svetla Danova Rositsa Tropcheva Nina Ivanovska | 2014 | Inflammation2014，，4： | 1 |
| 6 | Tmmunomodulatory fu nctions of leflunomide:imhibition of T helper(Th)l cell activation and promotio n of Th 2differentiation显示文摘 | Rudolf schleyerbach | 2001 | Arthritis & Rheuma tism2001，，4419： | 1 |
| 7 | Decrease of dehydrogenase activity of cerebral glyceraldehyde-3-phosphate dehydrogenase in different animal models of Alzheimer’s disease显示文摘 | Irina N. Shalova Katerina Cechalova Zuzana Rehakova Petya Dimitrova Elisa Ognibene Antonio Caprioli Elena V. Schmalhausen Vladimir I. Muronetz Luciano Saso | 2007 | BBA - General Subjects2007，，5： | 1 |
| 8 | On the determination of platinum group elements in environmental materials by inductively coupled plasma mass spectrometry and microwave digestion显示文摘 | Rumyana D Heike H Petya K | 2003 | Analytica Chimica Acta2003，489，： | 1 |
| 9 | 显示文摘 | Valentin K Gueorguiev Petya V Aleksandrova Tzvetan E Ivanov | 2009 | Thin Solid Films2009，517，： | 1 |
| 10 | Inflammatory response in patients with active and inactive osteoarthritis显示文摘 | Antoaneta Toncheva Mimi Remichkova Krassimira Ikonomova Petya Dimitrova Nina Ivanovska | 2009 | Rheumatology International2009，，10： | 1 |
| 11 | On the determination of platinum group elements in environmental materials by inductively coupled plasma mass spectrometry and microwave digestion显示文摘 | RUMYANA D HEIKE H PETYA K | 2003 | Anal Chim Acta2003，489，2： | 1 |
| 12 | Ion-exchange method for separation and concentration of platinum and palladium for analysis of environmental samples by inductively coupled plasma atomic emission spectrometry显示文摘 | PETYA K RUMYANA D | 2002 | Anal Chim Acta2002，464，1： | 1 |
| 13 | A Modified CTAB Method for DNA Extraction from Soybean and Meat Products显示文摘 | PETYA STEFANOVA MARIETA TASEVA TZVETA GEORGIEVA | 2013 | Biotechnology and Biotechnological Equipment2013，27，3： | 1 |
| 14 | Expression of the human acidic fibroblast growth factor in transgenic tomato and safety assessment of transgenic lines显示文摘 | Petya Stoykova Mariana Radkova Pravda Stoeva-Popova | | 0，，01： | 1 |
| 15 | Restriction of denovo pyrimidine biosynthesis inhibits Thl cell activation and promotes The Cell differentiation显示文摘 | Petya Dimitrova Alia Skapenko Matthias L | 2002 | Immu2002，169，6： | 1 |
| 16 | A MODEL FOR OPTIMIZING THE WORK OF ETHICS COMMITTEES IN THE HEALTHCARE SYSTEM IN BULGARIA: AN INSTRUMENT FOR MORE EFFECTIVE DISTRIBUTION OF HEALTHCARE SERVICES显示文摘 | Petya Trendafilova Neli Gradinarova | 2017 | US-China Law Review2017，14，12： | 0 |
| 17 | Mode of delivery by an ulcerative colitis mother in a case of twins: Immunological differences in cord blood and placenta显示文摘AIM To understand the effects of delivery mode on the immune cells frequency and function in cord blood and placenta.METHODS We evaluated immunological differences in cord blood and placental tissues for a case of twins one of which delivered vaginally while the other delivered by caesarian section(C-section). Cord blood mononuclear cells were isolated and placenta tissues were processed for cell isolation. Immune phenotyping was performed by flow cytometry methods following staining for T cells, natural killer(NK) cells, monocytes, neutrophils and CD71^+erythroid cells in both cord blood and placenta tissues. In addition, fetal calprotectin of twins was measured 12 wk after birth.RESULTS We found lower percentages of immune cells(e.g. T cells, monocytes and neutrophils) in the cord blood of C-section delivered compared to vaginally delivered newborn. In contrast, percentages of monocytes and neutrophils were > 2 folds higher in the placental tissues of C-section delivered newborn. More importantly, we observed lower percentages of CD71^+ erythroid cells in both cord blood and placental tissues of C-section delivered case. Lower CD71^+ erythroid cells were associated with a more pro-inflammatory milieu at the fetomaternal interface reflected by higher expression of inhibitory receptors on CD4^+ T cells, higher frequency of monocytes and neutrophils. Furthermore, type of delivery impacted the gene expression profile in CD71^+erythroid cells. Finally, we found that C-section delivered child had > 20-fold higher FCP in his fecal sample at 12 wk of age.CONCLUSION Mode of delivery impacted immune cells profile in cord blood/placenta. In particular frequency of immunosuppressive CD71^+ erythroid cells was reduced in C-section delivered newborn. | Garett Dunsmore Petya Koleva Reed Taylor Sutton Lindsy Ambrosio Vivian Huang Shokrollah Elahi | 2018 | World Journal of Gastroenterology2018，24，42： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员