298 research outputs found

    The surjectivity and the continuity of definable functions in some definably complete locally o-minimal expansions and the Grothendieck ring of almost o-minimal structures

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    In this paper, we first show that in a definably complete locally o-minimal expansion of an ordered abelian group (M, <,+, 0, ...) and for a definable subset X ⊆ Mn which is closed and bounded in the last coordinate such that the set πn−1(X) is open, the mapping πn−1 is surjective from X to Mn-1, where πn−1 denotes the coordinate projection onto the first n−1 coordinates. Afterwards, we state some of its consequences. Also we show that the Grothendieck ring of an almost o-minimal expansion of an ordered divisible abelian group which is not o-minimal is null. Finally, we study the continuity of the derivative of a given definable function in some ordered structures

    Diversity analysis of Moroccan carob ("Ceratonia siliqua" L.) accessions using phenotypic traits and RAPD markers

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    Diversity analysis of moroccan carob (Ceratonia siliqua L.) accessions using phenotypic traits and RAPD markers. The carob (Ceratonia siliqua L.) is a perennial leguminous (Caesalpinioideae) that grows as an evergreen shrub or tree. It¿s an important component of the Mediterranean vegetation and its adaptation in marginal soils of the Mediterranean regions is important environmentally and economically. Phenotypic and genetic diversity among 10 Ceratonia siliqua accessions coming from different areas of Morocco were studied with morphometric and RAPD approaches. The analysis of discriminative fruit characters showed highly significant differences among these accessions, the closely related ones have a similarity level less than 65%. No molecular studies have been carried out so far on Ceratonia siliqua. To provide markers useful for molecular diversity study of the carob tree, genomic DNA extraction and amplification conditions were finalized and 67 arbitrary primers were screened. 52 of them showed clearly reproducible banding patterns. The analysis of RAPD profiles revealed a high degree of genetic diversity within these carob accessions and enabled each of them to be uniquely fingerprinted. Overall, in our study we note that morphological relationship between carob accessions is deeply different to their molecular relationship. Concerning the distribution of the accessions according to their geographical origin, clustering based on RAPD data revealed a rough distribution of theses accessions. Indeed, Sidi Bou Ottman, Demnate and Essaouira accessions coming from the south of Morocco seem to be linked in the PCA plot. However, two geographically distant accessions, Aïn Sfa and Ouazzane coming from the north (about 700 Km) were clustered with Essaouira and Demanate - Sidi Bou Ottman, respectively.Analyse de la diversité des accessions du caroubier marocain (Ceratonia siliqua L.) utilisant des traits phenotypiques et des marqueurs RAPD. Le caroubier (Ceratonia siliqua L.) est une légumineuse pérenne (Caesalpinioideae), à feuillage persistant et pouvant croître entant qu¿arbrisseau ou arbre. C¿est un composant important de la végétation méditerranéenne et son adaptation aux sols marginaux des régions méditerranéennes est d¿une grande importance écologique et économique. La diversité phénotypique et génétique au sein de 10 accessions de caroubier provenant de différentes régions du Maroc a été étudiée par des approches morphométriques et moléculaires (RAPD). L¿analyse des caractères morphologiques discriminants du fruit a montré des différences hautement significatives au sein des accessions, puisque les apparentées d¿entre elles n¿ont approximativement que 65% de similarité. Jusqu¿à nos jours, aucune étude moléculaire n¿a été entreprise sur Ceratonia siliqua. Pour mettre à disposition des marqueurs utiles pour l¿étude de la diversité moléculaire du caroubier, l¿extraction de l¿ADN génomique et les conditions de l¿amplification ont été mises au point et 67 amorces arbitraires ont été criblées. 52 d¿entre elles ont montré clairement des profils de bandes reproductibles. L¿analyse des profils RAPD a révélé une diversité génétique de haut niveau entre les accessions de caroubier ce qui a permis à chacune d¿elles d¿être distinguée génétiquement de façon singulière. De manière générale, nous avons noté que la relation morphologique entre les accessions du caroubier est profondément différente de leur relation moléculaire. Concernant la distribution des accessions selon leur origine géographique, le regroupement basé sur les données de la RAPD a révélé une distribution grossière. En effet, les provenances de Sidi Bou Ottman, Demnate et Essaouira, originaires du sud de Maroc, semblent être liés par l¿analyse des composantes principales (PCA). Cependant, deux accessions géographiquement distantes, Aïn Sfa et Ouazzane, originaires du Nord (approximativement 700 Kms) ont été liées avec Essaouira et Demanate - Sidi Bou Ottman, respectivement

    Successful management of a large traumatic iris cyst

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    Background: Iris cysts are rare lesions of the anterior segment of the eye, they can be congenital or acquired. Themanagement of acquired post-traumatic iris cysts remains difficult. Case report: We report the case of a 24-year-old girl who presented with a progressive decrease in vision in the lefteye with pain and redness for the past few months. She had a history of penetrating injury in the same eye 14 yearsago. The slit lamp examination identified a corneal scar at 7’ o’clock and a large iris cyst deforming the pupillary area. Ultrasound biomicroscopy (UBM) has confirmed the benign nature of the cyst. Anterior segment optical coherence tomography (AS-OCT) has shown the contact of the external layer of the cyst with the corneal endothelium. Surgicalmanagement consisted of soft viscodissection to separate the cyst from the corneal endothelium followed by complete excision of the external layer of the cyst. Conclusion: The postoperative course was simple with good visual outcome

    The impact of knowledge and attitudes on adherence to tuberculosis treatment: a case-control study in a Moroccan region

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    Background: Although tuberculosis (TB) care is provided free of charge in Morocco, a high number of patients voluntarily interrupt their treatment before the end. Treatment Default is a major obstacle in the fight against the disease. The purpose of this study was to describe the impact of knowledge and attitudes toward TB on treatment adherence. Methods: Case-control study of 290 TB patients (85 defaulters and 205 controls). A defaulter was defined as a TB patient who interrupted treatment for two months or longer. Socio-demographic measurements, knowledge and attitude were collected by face to face anonymous questionnaire. Khi-square test was conducted to examine differences in TB attitudes and knowledge according to treatment adherence. Results: The mean age of participants was 31.7 &#177; 12.0 years. Monthly income was under 2000 MAD (180 ?) for 82 % of them. Over sixty four percent were illiterate or had a basic educational level. Microbial cause was known by 17.2% respondents; 20.5% among adherent patients versus 9.4% (p=0.02). The fact that the disease is curable was more known by adherent patients: 99.0% versus 88.2% (p&lt;0.01). Eighty tree per cent of patients had been informed about treatment duration and consequences of not completing treatment: 89.0% among adherent patients versus 69.7% (p&lt;0.001). The main reason evoked for defaulting was the sensation of being cured (72.9% of defaulters). Conclusion:&#160; This study shows a poor knowledge on TB especially among non adherent patients. This finding justifies the need to incorporate patient?s education into current TB case management. Pan African Medical Journal 2012; 12:5

    Digestive cancers in Morocco: Fez-Boulemane region

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    Introduction: To describe the epidemiological and pathological aspects of gastrointestinal cancers in Fez-Boulemane. Methods: This was a retrospective descriptive study of 1120 gastrointestinal cancers diagnosed between 2004 and 2010 in the department of Pathology of Hassan II University Hospital in Fez Morocco. Results: The average age of our patients was 53 years with a male predominance in 52% of cases. Digestive cancers in this study are distinguished by the predominance of colorectal and stomach location. Conclusion: Gastrointestinal cancers are the most frequent cancer in our region. An epidemiological monitoring program is needed.Pan African Medical Journal 2012; 13:4

    (±)-N-[4-Acetyl-5-methyl-5-(4-methyl­cyclo­hex-3-en­yl)-4,5-dihydro-1,3,4-thia­diazol-2-yl]acetamide

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    The new title thiadiazole compound, C14H21N3O2S, was semi-synthesized starting from 1-(4-methyl­cyclo­hex-3-en­yl)ethanone, a natural product isolated from Cedrus atlantica essential oil. The stereochemistry has been confirmed by single-crystal X-ray diffraction. The thia­diazo­line ring is roughly planar, although it may be regarded as having a half-chair conformation. The cyclo­hexenyl ring has a half-chair conformation. The most inter­esting feature is the formation of a pseudo-ring formed by four mol­ecules associated through N—H⋯O hydrogen bonds around a fourfold inversion axis, forming an R 4 4(28) motif

    Ocular penetrating injuries in children

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    Background: Ocular penetrating injuries in children are common and potentially serious. They take on a special character because of the major risk of amblyopia that they generate in children. The objective of this work is to analyze the epidemiological and clinical aspects of these serious traumas and to study the functional prognosis in Moroccan children. Material and methods: We conducted a retrospective study of 83 children between January 2016 and December 2019. The average age of children is 6.5 years, with 64 boys and 19 girls. Results: The circumstances of penetrating eye injuries are accidental dominated by street games. Corneal wounds represented 67.5% associated with iris prolapse in 39 cases and hyphema in 34 cases. In 30.1% of cases, a post-traumatic cataract is associated, and a foreign body is detected in 6% of cases. Final visual acuity ≥ 5/10 is objectified in 30% of cases. Results: This study highlights the importance of preventing these serious childhood traumas by implementing education and awareness-raising measures

    1-Isopropyl-4,7-dimethyl-2,8-dinitro­naphthalene

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    The title compound, C15H16N2O4, was synthesized from a mixture of α-himachalene (2-methyl­ene-6,6,9-trimethyl­bicyclo­[5.4.O1,7]undec-8-ene) and β-himachalene (2,6,6,9-tetra­methyl­bicyclo­[5.4.01,7]undeca-1,8-diene) which were isolated from an oil of the Atlas cedar (Cedrus atlantica). The asymmetric unit contains two independent mol­ecules. In each of the two mol­ecules, two O atoms of one nitro group are disordered over two sets of sites with site-occupancy factors of 0.636 (5):0.364 (5) and 0.832 (5):0.168 (5). The crystal structure features weak C—H⋯O hydrogen bonds

    10α-Hy­droxy-13-{[4-(4-meth­oxy­phen­yl)piperazin-1-yl]meth­yl}-4,9-dimethyl-3,8,15-trioxatetra­cyclo­[10.3.0.02,4.07,9]penta­decan-14-one

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    The title compound, C26H36N2O6, was synthesized from 9α-hy­droxy­parthenolide (9α-hy­droxy-4,8-dimethyl-12-methylen-3,14-dioxa-tricyclo­[9.3.0.02,4]tetra­dec-7-en-13-one), which was isolated from the chloro­form extract of the aerial parts of Anvillea radiata. The mol­ecule is built up from fused five- and ten-membered rings with two additional ep­oxy ring systems and a meth­oxy­phenyl­piperazine group as a substituent. The ten-membered ring adopts an approximate chair–chair conformation, while the piperazine ring displays a chair conformation and the five-membered ring shows an envelope conformation with the C atom closest to the hy­droxy group forming the flap. The mol­ecular conformation is determined by an O—H⋯N hydrogen bond between the hy­droxy group and a piperazine N atom. The crystal structure is built up by weak C—H⋯O inter­actions
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