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Combination of Transition Metals-(2,4-Pentanedionate) and P2O5 as a Regioselective Catalytic System for Nitric Acid Nitration of Ar-Himachalene

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Green and Sustainable Chemistry 2011年第3期1卷 111-115页

作者： Issam Hossini Mohamed Anoir Harrad Brahim Boualy Mustapha Ait Ali Larbi El Firdoussi abdallah karim 不详

A practical system of metals-(2,4-pentanedionate) (M(acac)n (M= Fe, Zn, Co and V)) and P2O5 in the pres- ence of HNO3 catalyzes regioselective nitration of ar-himachalene 1 to mono-nitro-ar-himachalene 2 in mod- erate to high yields. Under mild conditions, the selectivity of nitration of 1 to 2 is excellent compared to the classical method using the nitro-sulphuric mixture HNO3/H2SO4, both mono- and di-nitro-ar-himachalene 2 and 3 are obtained. The reaction offers a very good method for the preparation of nitro-aromatic compounds and provides a useful entry to new functionalized terpenic products.

关键词： Nitration Sesquiterpene Ar-Himachalene M(acac)n P2O5

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Child Deafness in Sub-Saharan Africa: Experience of Two ENT Services in Casamance, South of Senegal

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International Journal of Otolaryngology and Head & Neck Surgery 2021年第2期10卷 92-101页

作者： Tchiengang K. Junie Ndadi Moustapha Ndiaye Nirina Andry Randriamalala Adou abdallah Witti Isabelle Joké bé Coly Hawa Mamadou Watt Siga Evelyne Diom Bay karim Diallo Abdelaziz Raji ENT Department Peace Hospital of Ziguinchor Ziguinchor Senegal ENT Department Fann National University Hospital Dakar Senegal ENT Department Antananarivo National Hospital Antananarivo Madagascar Pediatric Department Peace Hospital of Ziguinchor Ziguinchor Senegal ENT Department Albert Royer Children Hospital Dakar Senegal ENT Department Mohammed VI University Hospital Marrakech Morocco

Introduction: Hearing impairment is the most common sensory deficit at birth. It is a public health problem because of the repercussions on the communication development, on the education and subsequent social integration of the child. The objective of this study was to determine the epidemiological, clinical, audiometric and etiological profiles of child deafness in Casamance, South of Senegal. Materials and Methods: This was a retrospective multicenter study, which extended a period of 7 years from January 1st, 2012 to December 31st, 2019. All children aged between 1 to 18 years old and received during their first ENT consultations at the regional and PEACE hospital in Ziguinchor were included. Results: One hundred and seventy-eight records of children were collected during this period, that is a prevalence of 1.30%. The average age was 9 years old. Conductive hearing loss was found in 68% of patients, followed by reception hearing deafness in 24%. The deafness was acquired in the majority of cases (93%) and the predominant etiology was infectious. However, the cause was unknown in 7.51% of cases. Conclusion: Child deafness is common in Casamance and is most often underdiagnosed. The acquired forms are the most common, hence the importance of early detection after a rigorous family investigation.

关键词： Deafness Children Casamance Senegal

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Total Hip Replacement in Young Adults Less Than Fifty Year Old: Our Experience

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Open Journal of Emergency Medicine 2017年第2期5卷 43-74页

作者： Adonis Magoumou Narcisse Dabiré Yassir El Andaloussi Said abdallah Amine Belmoubarik Rachid Ait-Mouha karim Ahed Nabil Omari Ahmed Reda Haddoun Driss Bennouna Mohamed Moujtahid Mohamed Nechad Mustapha Fadili Department of Orthopedic Traumatology Wing 4 Chu Ibn Rochd Casablanca Morocco

Background: We report a retrospective study of 47 total prosthesis of hip put in place among the young adult of less than fifty years in the service of Traumatology and Orthopedics at the Wing IV of the CHU Ibn Rochd of Casablanca, over a period from January 2008 to March 2014, with an average rate of decline of 42 months. Results: The deliberate group of 43 patients (47 hips including 4 bilateral) consisted of 26 women, either 60, 47% and 17 men, either 39, 53%. The average age of our patients was 36 years. In our series, the predominant etiology has been conducted for the indication of the hip replacement was the aseptic osteonecrosis of the femoral head which has represented 31.91%. With regards to the choice of implants, 85% of PTH were non-cemented, the cemented PTH has been used in 15% of cases. The Friction Torque metal/polyethylene was used in all cases. The functional outcome was appreciated by the rating of Merle of Aubigne before and after arthroplasty. The average rate of decline of 42 months, and the results were generally satisfactory. They were excellent in 27.78% of cases, very good in 19.44% of cases and good in 44.44% of cases. The results on the Pain were remarkable: the rating of the pain going 2.8 in pre-operative at 5.6 at the latest decline. The results on the walking and mobility were also good. It was noted as a complication: 4 cases of prosthetic dislocation, 1 case of aseptic descellement bipolar, 2 cases of early sepsis on hardware, 3 cases of paralysis of the sciatic external popliteal and 4 cases of periprothetiques ossification. In total, 5 total prosthesis of hip were occasions. The young age does not seem to be an obstacle to the prosthetic surgery. Conclusion: However, a major question remains concerning the distant future of these prostheses in young active subjects, because they will be submitted for many years in a job which can cause the descellement of prosthetic parts.

关键词： Total Hip Replacement Young Subjects Hip Disease Casablanca

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