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10篇 您的检索式:作者名="Aleksandr L"
    题名 作者 年代 出处 被引量
1Composite end point of graft-versus-host disease-free, relapse-free sur- vival after allogeneic hematopoietic cell transplantation显示文摘Holtan SG DeFor TE Aleksandr L 2015Blood2015,125,8:1
2Voriconazole 显示文摘LILY A J FRANK J P ALEKSANDR G L 2003Clin Ther2003,25,5:1
3Immobilizing enzymes onto electrode arrays by hydrogel photolithography to fabricate multi-analyte electrochemical biosensors显示文摘Jun Yan Pedrosa V A Aleksandr L Simonian 0,,03:1
4Pathogenesis of Hong Kong H5N1 influenza virus NS gene reassortants in mice: the role of cytokines and B- and T-cell responses显示文摘Aleksandr S L Samita A Richard J W 2005J Virol2005,86,:1
5Copper Nanoparticles and Carbon Nanotubes-Based Electrochemical Sensing System for Fast Identification of Tricresyl-Phosphate in Aqueous Samples and Aair显示文摘Valber A Pedrosa Rigved Epur Aleksandr L Simonia 2009Sensors and Actuators B2009,140,2009:1
6Mesoporous silica nanoparticles in biomedical applications显示文摘Zongxi L Bames J C Aleksandr B 2012Chemical Society Reviews2012,41,7:1
7Competitive oxidation of volatile fatty acids by sulfate- and nitrate-reducing bacteria from an oil field in Argentina显示文摘Grigoryan Aleksandr A Cornish Sabrina L Buziak Brenton 2008Appl Environ Microbiol2008,74,14:1
8Poly(ethylene glycol) hydrogel-encapsulated fluorophore-enzyme conjugates for direct detection of organophosphorus neurotoxins显示文摘Ryan J Russell Michael V Pishko Aleksandr L Simonian 1999Anal Chem1999,71,:1
9New perspectives on robotic pancreaticoduodenectomy:An analysis of the National Cancer Database显示文摘BACKGROUND Pancreatic ductal adenocarcinoma is a common malignancy.Despite all advancements,the prognosis remains,poor with an overall 5-year survival of only 10.8%.Recently,a robotic platform has become an attractive tool for treating pancreatic cancer(PC).While recent studies indicated improved lymph node(LN)harvest during robotic pancreaticoduodenectomy(PD),data on long-term outcomes are insufficient.AIM To evaluate absolute LN harvest during PD.Secondary outcomes included evaluating the association between LN harvest and short-and long-term oncological outcomes for three different surgical approaches.METHODS We conducted an analysis of the National Cancer Database,including patients diagnosed with PC who underwent open,laparoscopic,or robotic PD in 2010-2018.One-way analysis of variance was used to compare continuous variables,chi-square test-for categorical.Overall survival was defined as the time between surgery and death.Median survival time was estimated with the Kaplan-Meier method,and groups were compared with the Wilcoxon test.A Cox proportional hazards model was used to assess the association of covariates with survival after controlling for patient characteristics and procedure type.RESULTS 17169 patients were included,8859(52%)males;mean age 65;14509(85%)white.13816(80.5%)patients had an open PD,2677(15.6%)and 676(3.9%)-laparoscopic and robotic PD respectively.Mean comorbidity index(Charlson-Deyo Score)0.50.On average,18.84 LNs were harvested.Mean LN harvest during open,laparoscopic and robotic PD was 18.59,19.65 and 20.70 respectively(P<0.001).On average 2.49 LNs were positive for cancer and did not differ by the procedure type(P=0.26).Vascular invasion was noted in 42.6%of LNs and did differ by the approach:42.1%for open,44.0%for laparoscopic and 47.2%for robotic PD(P=0.015).Median survival for open PD was 26.1 mo,laparoscopic-27.2 mo,robotic-29.1 mo(P=0.064).Survival was associated with higher LN harvest,while higher number of positive LNs was associated with higher mortality.CONCLUSION Our study suggests that robotic PD is associated with increased intraoperative LN harvest and has comparable short-term oncological outcomes and survival compared to open and laparoscopic approaches.Aleksandr Kalabin Vishnu R Mani Robin L Kruse Chase Schlesselman Kai Yu Li Kevin F Staveley-O'Carroll Eric T Kimchi 2023World Journal of Gastrointestinal Surgery2023,15,1:0
10Acoustic emission characterization of sliding wear under condition of direct and inverse transformations in lowtemperature degradation aged Y-TZP and Y-TZP-Al_2O_3显示文摘In this research, results of the investigation of the sliding friction and wear of yttria-stabilized tetragonal zirconia polycrystalline(Y-TZP) and Y-TZP-Al_2O_3 samples preliminarily subjected to low-temperature degradation are reported. The investigation was carried out using a pin-on-disk tribometer with simultaneous recording of acoustic emission(AE) and vibration acceleration. The sliding wear process was found to be determined by dynamic direct and inverse Y-TZP transformations detected by monoclinic and tetragonal X-ray diffraction peak ratios. The AE signals generated under direct and inverse transformations can be used to characterize wear and friction mechanisms as well as direct and inversed sliding-induced phase transformations. The AE signal energy grows with the friction coefficient and the inverse transformation degree. Reduction of the AE signal energy indicates establishing the mild wear stage caused by effective stress-induced direct martensitic transformation. The AE signal median frequency increases in the case of lower friction. Numerical studies of wear subsurface fracture under conditions of stress-induced martensitic transformation were used to elucidate the role played by the phase transformation in Y-TZP and Y-TZP-Al_2O_3. Martensitic transformation in Y-TZP was described with use of the non-associated dilatant plasticity model. Simulation results particularly show that increase in the value of dilatancy coefficient from 0 to 0.2 is accompanied by 25%-30% reduce in characteristic length and penetration depth of sliding-induced subsurface cracks. As shown the AE may be an effective tool for in-situ monitoring the subsurface wear of materials experiencing both direct and inverse transformations.Nikolai L SAVCHENKO Andrey V FILIPPOV Sergei Yu TARASOV Andrey I DMITRIEV Evgeny V SHILKO Aleksandr S GRIGORIEV 2018Friction2018,6,3:0
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