Isolasi dan Identifikasi Yeast dari Rhizosfer Rhizophora Mucronata Wonorejo

Yeast merupakan mikroorganisme uniseluler eukaryotik yang bersifat saprofit atau parasit serta memiliki sifat antimikroba dan lebih bisa tahan terhadap stres lingkungan. Eksplorasi yeast di kawasan mangrove Indonesia belum banyak dilakukan, terutama di daerah rhizofer Rhizophora mucronata Wonorejo. Penelitian ini bertujuan untuk mengidentifikasi yeast dari rhizosfer R. Mucronata Wonorejo hingga tingkat genus. Yeast diidentifikasi berdasarkan karakteristik morfologi makroskopis dan mikroskopis, reproduksi seksual, serta ciri fisiologis dan biokimianya. Pada penelitian ini diperoleh 19 isolat yang diidentifikasikan ke dalam 6 genus, yakni Candida, Saccharomyces, Pichia, Hansenula, Debaryomyces, dan Torulaspor

Isolasi dan Karakterisasi Yeast dari Rhizosphere Avicennia Marina Wonorejo

Salah satu mikroba yang berperan penting dalam proses biodegradasi bahan organik adalah yeast. Yeast berpartisipasi dalam berbagai proses ekologis signifikan dalam laut, terutama di muara dan dekat pantai. Diantara peran tersebut adalah sebagai pendekomposisi substrat tumbuhan, daur ulang nutrisi, dan biodegradasi senyawa minyak. Penelitian ini dilakukan untuk mengisolasi dan mengkarakterisasi yeast dari rhizosphere Avicennia marina Wonorejo. Karakterisasi yeast dilakukan hingga tingkat genus melalui pengamatan makroskopis, mikroskopis, dan uji fisiologis. Hasil penelitian ini didapatkan 12 isolat yeast dari rhizosphere Avicennia marina Wonorejo yang diduga masuk ke dalam genus Rhodotorula, Hansenula, Saccharomyces, Candida, Debaryomyces, Dekkera, dan Geotrichu

Rupture post traumatique de la membrane de Bruch: à propos d’un cas

Une contusion du globe peut se compliquer de rupture de la membrane de Bruch ou de la choroïde. Cette complication est observée dans 5 à 10% des cas avec une nette prédominance masculine. Nous rapportons l'observation clinique d'un patient de 26 ans, victime d'un traumatisme contusif sévère de l'oeil gauche chez qui l'examen retrouve une rupture de la membrane de bruch au fond d'oeil ; l'evolution spontanné a été marquée parune amélioration visuelle sans complications néovasculaires. Au cours des ruptures post traumatiques de la membrane de bruch le pronostic est essentiellement lié d'une part à sa localisation par rapport à la macula; et d'autre part à la survenue de complications néovasculaires (15 à 30 %des cas)

Quantum Critical Point in the Spin Glass-Kondo Transition in Heavy Fermion Systems

The Kondo-Spin Glass competition is studied in a theoretical model of a Kondo lattice with an intra-site Kondo type exchange interaction treated within the mean field approximation, an inter-site quantum Ising exchange interaction with random couplings among localized spins and an additional transverse field in the x direction, which represents a simple quantum mechanism of spin flipping. We obtain two second order transition lines from the spin-glass state to the paramagnetic one and then to the Kondo state. For a reasonable set of the different parameters, the two second order transition lines do not intersect and end in two distinct QCP.Comment: 20 pages; 1 figure; to appear in Physical Review

The epidemiology of HIV infection in Morocco: systematic review and data synthesis.

Morocco has made significant strides in building its HIV research capacity. Based on a wealth of empirical data, the objective of this study was to conduct a comprehensive and systematic literature review and analytical synthesis of HIV epidemiological evidence in this country. Data were retrieved using three major sources of literature and data. HIV transmission dynamics were found to be focused in high-risk populations, with female sex workers (FSWs) and clients contributing the largest share of new HIV infections. There is a pattern of emerging epidemics among some high-risk populations, and some epidemics, particularly among FSWs, appear to be established and stable. The scale of the local HIV epidemics and populations affected show highly heterogeneous geographical distribution. To optimize the national HIV response, surveillance and prevention efforts need to be expanded among high-risk populations and in geographic settings where low intensity and possibly concentrated HIV epidemics are emerging or are already endemic

Transient up- and down-regulation of expression of myosin light chain 2 and myostatin mRNA mark the changes from stratified hyperplasia to muscle fiber hypertrophy in larvae of gilthead sea bream (Sparus aurata L.)

Hyperplasia and hypertrophy are the two mechanisms by which muscle develops and grows. We study these two mechanisms, during the early development of white muscle in Sparus aurata, by means of histology and the expression of structural and regulatory genes. A clear stage of stratified hyperplasia was identified early in the development of gilthead sea bream but ceased by 35 dph when hypertrophy took over. Mosaic recruitment of new white fibers began as soon as 60 dph. The genes mlc2a and mlc2b were expressed at various levels during the main phases of hyperplasia and hypertrophy. The genes myog and mlc2a were significantly up-regulated during the intensive stratified formation of new fibers and their expression was significantly correlated. Expression of mstn1 and igf1 increased at 35 dph, appeared to regulate the hyperplasia-to-hypertrophy transition, and may have stimulated the expression of mlc2a, mlc2b and col1a1 at the onset of mosaic hyperplasia. The up-regulation of mstn1 at transitional phases in muscle development indicates a dual regulatory role of myostatin in fish larval muscle growth

Holoprosencéphalie : A propos d’un cas

L'holoprosencéphalie (HPE) est une malformation cérébrale complexe résultant d'une division incomplète du prosencéphale, survenant entre le 18ème et le 28ème jour de vie embryonnaire et affectant à la fois le cerveau et la face. Trois degrés de sévérité croissante ont été décrits : l'holoprosencéphalie lobaire, semi-lobaire, et alobaire. Des anomalies de la face peuvent s'associer à la malformation cérébrale (leur gravité reflète grossièrement le degré de sévérité de l'holoprosencéphalie). Les étiologies sont essentiellement les anomalies chromosomiques et le diabète maternel. Le diagnostic repose sur l’échographie et l’IRM anténatales au troisième trimestre de la grossesse, la clinique, l’échographie trans-fontanellaire, la TDM et surtout l’IRM cérébrale. Le diagnostic génétique fait appel au caryotype. Nous décrivons un cas d’ holoprosencéphalie découverte après un accouchement survenu à 30 SA, chez une patiente primigeste de 26 ans, mal suivie, ayant une consanguinité du premier degré, non supplémentée en acide folique, et ayant pris du fenugrec au cours du premier trimestre de sa grossesse. Dans la majorité des cas, le pronostic est réservé.