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Zeolite-assisted etherification of glycerol with butanol for biodiesel oxygenated additives production

Journal of Energy Chemistry 2020年第9期29卷 136-144,I0005页

作者： C.Cannilla g.bonura S.Maisano L.Frusteri M.Migliori g.giordano S.Todaro F.Frusteri CNR-ITAE Istituto di Tecnologie Avanzate per l'Energia“Nicola Giordano”Via S.Lucia 598126 MessinaItaly Dipartimento di Ingegneria Elettronica Chimica e Ingegneria IndustrialeUniversitàdi MessinaContrada di Dio I98166 MessinaItaly Bucci 97036 RendeItaly

This research was focused on the valorisation of glycerol,exploring the feasibility of an efficient route for oxygenated additives production based on its etherification with bio-butanol.A home-made BEA zeolite sample with a tuneable acidity has been proposed as the catalytic system,being tested in a stirred reactor under different etherification *** a reaction temperature as high as 200℃resulted to be beneficial in terms of glycerol conversion(-90%),only by operating at milder conditions the product selectivity to glycerol-ethers can be better controlled,in order to obtain a bio-fuel complying with the requirements for mixing with fossil diesel or biodiesel,without any need of purification from large amount of by-products.A comprehensive identification of all the compounds formed during the reaction was performed by a gC-MS analysis,on the basis of the complex network of consecutive and parallel reaction paths leading not only to the desired ethers,but also to many side products not detected in similar acid-catalyzed reactions in liquid phase and not available in the most used mass-spectra libraries.

关键词： glycerol Butanol BEA gC-MS analysis Acid catalysts Biofuels Butyl glycerol ethers

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Assessment of SARS-CoV-2 RNA shedding in semen of 36 males with symptomatic,asymptomatic,and convalescent infection during the first and second wave of COVID-19 pandemic in Italy

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Asian Journal of Andrology 2022年第2期24卷 135-138页

作者： Carlo Pavone giovanni M giammanco Andrea Pio Cascino Davide Baiamonte Mirko Pinelli Enrico Cangelosi Chiara Filizzolo giuseppa Sciortino Simona De grazia Floriana bonura Section of Urology Department of SurgicalOncological and Oral SciencesUniversity of PalermoPalermo 90127Italy Section of Microbiology Department of Health PromotionMother and Child CareInternal Medicine and Medical SpecialtiesUniversity of PalermoPalermo 90127Italy Section of Internal Medicine Department of Health PromotionMother and Child CareInternal Medicine and Medical SpecialtiesUniversity of PalermoPalermo 90127Italy

The severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)receptor,angiotensin-converting enzyme 2(ACE2),has been identified in the human testis,but the risk of transmission of SARS-CoV-2 through sexual intercourse still needs to be *** goal of our study was to determine if SARS-CoV-2 is detectable in the semen of patients suffering or recovering from coronavirus disease-19(COVID-19),still testing positive at nasopharyngeal swabs but showing mild or no symptoms at the time of *** of SARS-CoV-2 RNA in semen was performed by real-time reverse transcriptase-polymerase chain reaction(RT-PCR)and nested PCR targeting open reading frame(ORF)*** history of the enrolled patients was taken,including COVID-19-correlated symptoms,both at the time of diagnosis and at the time of *** of real-time RT-PCR and nested PCR in semen showed no evidence of SARS-CoV-2 RNA in the 36 patients suffering or recovering from COVID-19 but still positive in a nasopharyngeal swab,from over 116 patients enrolled in the ***-CoV-2 detection and persistence in semen would have an impact on both clinical practice and public health strategies,but our results would suggest that SARS-CoV-2 is not present in the semen of men recovering from COVID-19.

关键词： coronavirus COVID-19 Italy SARS-CoV-2 semen sexual transmission

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Dimethyl ether as circular hydrogen carrier:Catalytic aspects of hydrogenation/dehydrogenation steps

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Journal of Energy Chemistry 2021年第7期30卷 55-77页

作者： Enrico Catizzone Cesare Freda giacobbe Braccio Francesco Frusteri giuseppe bonura ENEA–Italian Agency for New Technologies Department of Energetic TechnologiesLaboratory of Thermochemical Processes for Waste and Biomass ValorisationRotondellaItaly CNR-ITAE–Consiglio Nazionale delle Ricerche Istituto di Tecnologie Avanzate per l’Energia‘‘Nicola Giordano”Via S.Lucia Sopra Contesse 5I-98126 MessinaItaly

The intermittent nature of renewable resources requires for most applications the development of efficient and cost-effective technologies for steady supply of electrical *** storage of energy in the form of hydrogen chemically bound within organic molecules(rather than physically as compressed gas or cooled liquid)represents an alternative approach that is attracting great research *** to other liquid organic hydrogen carriers(LOHCs),dimethyl ether(DME)appears to have the largest potential impact on society,especially if inserted in technological chains of CO_(2) sequestration and utilization,so to determine an effective mitigation of environmental issues,without any net effect on the carbon ***,the steps of H2 storage and H2 release can take place in two coupled chemical processes,constituted by the exothermic synthesis of DME via CO_(2) hydrogenation and the endothermic steam reforming of DME,***,the latest advances in the development of heterogeneous bifunctional and hybrid catalysts for the direct hydrogenation of CO_(2) to DME are thoroughly reviewed,with special emphasis on thermodynamics,catalyst design and process *** many aspects behind the mechanism of DME synthesis from H2-CO_(2) streams are still to be uncovered,the recent progress in the research on H2 release by DME steam reforming is increasing the interest for effectively closing this binary H2 loop,in view of future green deals and sustainable research developments.

关键词： DME CO_(2)hydrogenation Steam Reforming Hybrid catalysts Hydrogen carrier

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Left bundle branch block and myocardial infarction, a diagnosis not always easy: Our experience and review of literature

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World Journal of Cardiovascular Diseases 2012年第2期2卷 90-94页

作者： Angela Sansone Francesca bonura Fabiana Castellano Rosanna Iacona Dario Mancuso giuseppina Novo Pasquale Assennato Salvatore Novo Department of Internal Medicine Cardiovascular and Nephro-Urological Disease Unit of Cardiology University of Studies “P. Gi-accone” Palermo Palermo Italy

The occurrence of left bundle branch block (LBBB) is quite common in clinical practice. The changes in cardiac repolarization, caused by this disorder of electric conduction, may mask the presence of an acute myocardial infarction (AMI), delaying the diagnostic-therapeutic iter, with an important impact on prognosis. We describe the case of a woman of 59 years with LBBB, came to our observation for a constrictive chest pain associated with dyspnea. The diagnostic workup for suspected acute coronary syndrome (ACS), initially conducted only on the analysis of the electrocardiogram (negative TnI at entry), showed the presence of coronary arteries free of stenosis. However, the diagnostic confirmation of AMI was completed after the rise of cardiac markers and the electrocardiographic changes. This case confirm the difficulty about the diagnosis of AMI in patients with LBBB and stresses, however, as the use of some criteria proposed in the literature [1-3] can guide to its identification, directing patient to an appropriate treatment.

关键词： Left Bundle Branch Block (LBBB) Myocardial Infarction Electrocardiogram.

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