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| 1 | Stability of highly supersaturated vanadium electrolyte solution and characterization of precipitated phases for vanadium redox flow battery显示文摘The vanadium redox flow battery(VRFB)has been receiving great attention in recent years as one of the most viable energy storage technologies for large-scale applications.However,higher concentrations of vanadium species are required in the H_(2)O-H_(2)SO_(4) electrolyte in order to improve the VRFB energy density.This might lead to unwanted precipitation of vanadium compounds,whose nature has not been accurately characterized yet.For this purpose,this study reports the preparation ofⅤ^((Ⅱ)),ⅤV^((Ⅲ)),Ⅴ^((Ⅳ))andⅤ^((Ⅴ))supersaturated solutions in a 5 M H_(2)SO_(4)-H_(2)O electrolyte by an electrolytic method,from the only vanadium sulfate compound commercially available(VOSO_(4)).The precipitates obtained by ageing of the stirred solutions are representative of the solids that may form in a VRFB operated with such supersaturated solutions.The solid phases are identified using thermogravimetric analysis,X-ray diffraction and SEM.We report that dissolvedⅤ^((Ⅱ)),Ⅴ^((Ⅲ))andⅤ^((Ⅳ))species precipitate as crystals of VSO_(4),V_(2)(SO_(4))3 and VOSO_(4) hydrates and not in their anhydrous form;conversely V^((Ⅴ))precipitates as an amorphous V_(2) O_(5) oxide partially hydrated.The measured hydration degrees(respectively 1.5,9,3 and 0.26 mol of H_(2)O per mol of compound)might significantly affect the overall engineering of VRFB operating with high vanadium concentrations. | Waldemir M.Carvalho Jr Laurent Cassayre Delphine Quaranta Fabien Chauvet Ranine El-Hage Theodore Tzedakis Béatrice Biscans | 2021 | Journal of Energy Chemistry2021，30，10： | 3 |
| 2 | Short-term and middle-term evaluation of laparoscopic hepatectomies compared with open hepatectomies: A propensity score matching analysis显示文摘AIM To compare short-term results between laparoscopic hepatectomy and open hepatectomy using a propensity score matching. METHODS A patient in the laparoscopic liver resection(LLR) groupwas randomly matched with another patient in the open liver resection(OLR) group using a 1:1 allocated ratio with the nearest estimated propensity score. Patients of the LLR group without matches were excluded. Matching criteria included age, gender, body mass index, American Society of Anesthesiologists score, potential co-morbidities, hepatopathies, size and number of nodules, preoperative chemotherapy, minor or major liver re-sections. Intraoperative and postoperative data were compared in both groups.RESULTS From January 2012 to January 2015, a total of 241 hepa-tectomies were consecutively performed, of which 169 in the OLR group(70.1%) and 72 in the LLR group(29.9%). The conversion rate was 9.7%(n = 7). The mortality rate was 4.2% in the OLR group and 0% in the LLR group. Prior to and after propensity score matching, there was a statistically significant difference favorable to the LLR group regarding shorter operative times(185 min vs 247.5 min; P = 0.002), less blood loss(100 m L vs 300 m L; P = 0.002), a shorter hospital stay(7 d vs 9 d; P = 0.004), and a significantly lower rate of medical complications(4.3% vs 26.4%; P < 0.001). CONCLUSION Laparoscopic liver resections seem to yield better short-term and mid-term results as compared to open hepatectomies and could well be considered a privileged approach and become the gold standard in carefully selected patients. | Xavier Untereiner Audrey Cagnet Riccardo Memeo Vito De Blasi Stylianos Tzedakis Tullio Piardi Francois Severac Didier Mutter Reza Kianmanesh Jacques Mare-scaux Daniele Sommacale Patrick Pessaux | 2016 | World Journal of Gastrointestinal Surgery2016，8，9： | 2 |
| 3 | Electrochemical regeneration of Ce(IV) for oxidation of p-methoxytoluene显示文摘 | Tzedakis T Savall A | 1997 | Journal of Applied Electrochemistry1997，27，5： | 1 |
| 4 | Electrochemical regeneration of Ce (IV)for oxidation of p-methoxytoluene显示文摘 | Savall A | 1997 | Appl Electrochemistry1997，，27： | 1 |
| 5 | The effect of z over scanning on radiation burden of pediatric patients undergoing head CT with multidetector scanners:a monte carlo study 显示文摘 | Tzedakis A Perisinakis K Raissaki M | 2006 | Med Phys2006，33，： | 1 |
| 6 | Palaeolithic landscapes of Europe and environs, 150000- 25000 years ago: an over- view 显示文摘 | Van Andel T H Tzedakis P C | 1996 | Quaternary Science Reviews1996，15，： | 1 |
| 7 | Buffered tree population changes in a Quaternary refugium:evolutionary implications 显示文摘 | Tzedakis P C Lawson I T Frogley M R | 2002 | Science2002，297，： | 1 |
| 8 | Electrochemical Regeneration of Ce(Ⅲ) for oxidation p-Methoxytoluene显示文摘 | Tzedakis T Savall A | 1997 | Journal of Applied Eletctrochemistry1997，27，5： | 1 |
| 9 | Determination of the weighted CT dose index in modem multi-detector CT scanners显示文摘 | Perisinakis K Damilakis J Tzedakis A | 2007 | Phys Med Biol2007，52，21： | 1 |
| 10 | Response to comment on 'Buffered tree population changes in a Quater- nary refugium: evolutionary implications' 显示文摘 | Tzedakis P C Lawson I T Frogley M R | 2003 | Science2003，299，： | 1 |
| 11 | Peffusion Scintigraphy versus 256-slice CT angiography in pregnant patients suspected of pulmonary embolism:comparison of radiation risks显示文摘 | Perisinakis K Seimenis I Tzedakis A | 2014 | J Nucl Med2014，55，8： | 1 |
| 12 | Electrchemical regeneration of Ce( Ⅳ ) for oxidation of P - methoxytotuene, 显示文摘 | Tzedakis T Savall A | 1997 | Appl Electrochem1997，27，： | 1 |
| 13 | Determination of the weighted CT dose index in modern multi-detector CT scanners显示文摘 | Perisinakis K Damilakis J Tzedakis A | | 0，，21： | 1 |
| 14 | Quaternary refugia of the North European trees 显示文摘 | Bennett K D Tzedakis P C Willis K J | 1991 | Biogeography1991，18，： | 1 |
| 15 | Thyroid dose from common head and neck CT examinations in children: is there an excess risk for thyroid cancer induction? 显示文摘 | Mazonakis M Tzedakis A Damilakis J | 2007 | Eur Radiol2007，17，5： | 1 |
| 16 | Climate variability in northwest Greece during the Last Interglacial显示文摘 | Frogley M R Tzedakis P C Heaton T H E | 1999 | Science1999，285，： | 1 |
| 17 | Determination of the weighted CT dose index in modem multi-detector CT scanners显示文摘 | Perisinakis K Damilakis J Tzedakis A | 2007 | Phys Med Biol2007，52，21： | 1 |
| 18 | 显示文摘 | TZEDAKIS T DURLIAT H COMTAT M | 1997 | J Electro Chem1997，，： | 1 |
| 19 | Thyroid dose from common head and neck CT examinations in children:is there anexcess risk for thyroid cancer induction? 显示文摘 | Mazonakis M Tzedakis A Damilakis J | 2007 | Eur Radiol2007，17，5： | 1 |
| 20 | Thyroid dose from common head and neck CT examinations in children: is there an excess risk for thyroid cancer induction?显示文摘 | Mazonakis M Tzedakis A Damilakis J | 2007 | Eur Radiol2007，7，5： | 1 |
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