Ruthenium(II) complexes of Schiff base derived from cycloalkylamines as pre-catalysts for ROMP of norbornene and ATRP of methyl methacrylate
Publication date: 15 November 2017 Source:Journal of Organometallic Chemistry, Volume 851 Author(s): Maria Beatriz A. Afonso, Thais R. Cruz, Yan F. Silva, João Clécio A. Pereira, Antonio E.H. Machado, Beatriz E. Goi, Benedito S. Lima-Neto, Valdemiro P. Carvalho-Jr Ruthenium(II) complexes of Schiff base derived from cycloalkylamines (cycloalkyl = cyclopentyl (1a), cyclohexyl (1b), cycloheptyl (1c), and cyclooctyl) (1d) were synthesized: [RuCl(CyPen-Salen)(PPh3)2] (2a), [RuCl(CyHex-Salen)(PPh3)2] (2b), [RuCl(CyHep-Salen)(PPh3)2] (2c), and [RuCl(CyOct-Salen)(PPh3)2] (2d). The Schiff base-RuII complexes 2a-d were characterized by elemental analysis, FTIR, UV-Vis, 1H-, 13C and 31P NMR, and cyclic voltammetry. The complexes 2a-d were evaluated as catalytic precursors for ROMP of norbornene (NBE) and for ATRP of methyl methacrylate (MMA). The syntheses of polynorbornene (polyNBE) via ROMP with complexes 2a-d as pre-catalysts were evaluated under different reaction conditions ([HCl]/[Ru], [EDA]/[Ru], [NBE]/[Ru], and temperature). The highest yields of polyNBE were obtained with [NBE]/[HCl]/[Ru] = 5000/25/1 M ratio in the presence of 5 μL of EDA for 60 min at 50 °C. MMA polymerization via ATRP was conducted using the complexes 2a-d in the presence of ethyl-α-bromoisobutyrate (EBiB) as initiator. The catalytic tests were evaluated as a function of the reaction time using the initial molar ratio of [MMA]/[EBiB]/[Ru]&nbs...
Authors: San C, Lê MP, Matheron S, Mourvillier B, Caseris M, Timsit JF, Wolff M, Yazdanpanah Y, Descamps D, Peytavin G Abstract HIV infection has evolved into a chronic disease with comorbidities since the combination antiretroviral therapy era. Complications still occur and patients may need to be admitted to an intensive care unit. Acute respiratory failure is the first cause of these admissions, questioning the administration of solid oral dosage formulations. This issue is also observed in geriatric units where the prevalence of dysphagia is high and underestimated. The problem of antiretroviral administr...
Authors: Petitdemange A, Martin A, Ruch Y, Chatron E, Karol A, Hansmann Y PMID: 31722863 [PubMed - as supplied by publisher]
Authors: Soumah A, Avettand-Fenoel V, Veber F, Moshous D, Mahlaoui N, Blanche S, Frange P Abstract OBJECTIVES: To assess the outcome of HIV-infected individuals attending one of the largest French pediatric HIV centers in 2016-2017 and to compare the rates of antiretroviral coverage and virological suppression with the UNAIDS targets. PATIENTS AND METHODS: The clinical and immuno-virological status of 163 HIV-1-infected children and adolescents attending Necker Hospital in Paris, France, were investigated. Virological suppression was defined as an HIV-1 viral load
Authors: Voitey M, Bouiller K, Chirouze C, Fournier D, Bozon F, Klopfenstein T Abstract INTRODUCTION: Little is known about the functional symptoms associated with Lyme borreliosis (LB) in Europe. We aimed to assess functional symptoms associated with presumed LB and to compare patients with and without confirmed LB. MATERIALS AND METHODS: We performed a retrospective monocenter study. Patients consulting for presumed LB were included. RESULTS: Between November 2015 and June 2018, 355patients were included (mean age: 51years, 52% of women) of which 48had LB: erythema migrans (42%), early disseminated LB (50...
Authors: Rahman M, Beg S PMID: 31722657 [PubMed - in process]
Publication date: Available online 15 November 2019Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral RadiologyAuthor(s): Konstantinos I. Tosios, Eleni-Marina Kalogirou, Nikolaos G. Nikitakis
ConclusionThe method achieved high performance for automation of tooth segmentation on dental panoramic images. The proposed method might be applied in the first step of diagnosis automation and in forensic identification, which involves similar segmentation tasks.
ConclusionsSequestra and periosteal new bone formation were characteristic CT features of osteomyelitis that were found more commonly in the medication-related condition. These findings may be useful in the evaluation of osteomyelitis and medication-related osteonecrosis of the jaw.
ConclusionAcceptance QA testing was effective in detecting discrepancies and establishing optimal exposure doses that were within the DRL and AD established by the National Council on Radiation Protection and Measurements and the ESE established by the state of Texas.
Publication date: Available online 15 November 2019Source: British Journal of Oral and Maxillofacial SurgeryAuthor(s): L. May, J. Blatter, P. Bize, G. Tsoumakidou, A. Denys, M. BroomeAbstractTreatment of bony tumours of the oral and maxillofacial area usually involve resection. However, access to certain areas may be difficult because of the size or site of the tumour. A poor view of the lesion during operation is another limiting factor, which can lead to incomplete resection in difficult cases. Percutaneous cryoablation is a common procedure for treating benign and malignant bony lesions outside the oral and maxillofacia...
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