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Biodiversity of Arbuscular Mycorrhizal (AM) fungi in mangroves of Goa in West India

Journal of Forestry Research 2013年第3期24卷 515-523页

作者： James D'Souza bernard felinov rodrigues Department of Botany Goa UniversityGoa 403 206 India

Seventeen mangrove species of eight families at seven river- ine and fringe habitats in Goa West India were surveyed for Arbuscular Mycorrhizal （AM） fungal diversity. Sixteen species were found to be mycorrhizal and one species showed no AM fungal colonization. AM root colonization was recorded at all seven sites and ranged from 6%-77%. Maximum root colonization was recorded in Excoecaria agal- locha （77%） and minimum colonization in Avicennia marina （6%）. Paris-type colonization was predominant at all sites. Auxiliary cells were recorded in roots of Acanthus ilicifolius, Ceriops tagal and Sonneretia alba. AM fungal root colonization and spore density varied by plant species and site. Site average spore density ranged from 1.84 spores.g^-1 to 0.54 spores.g-1 of soil. In total, 28 AM fungal species of five genera, viz. Glomus, Acaulospora, Scutellospora, Gigaspora and Entrophospora, were recovered. Glomus was the dominant genus, three species of which were sporocarpic forms. Maximum site species richness （SR） ranged from 16 to 5. Species richness was maximum in A. ilicifolius where seven species of three genera were recovered. Based on relative abun- dance （RA） and isolation frequency （IF）, two common species, viz. G. intraradices and A. laevis, were recovered from all seven sites.

关键词： Glomus intraradices root colonization Paris type sporedensity rhizosphcre

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Enhancement of seed germination in Macaranga peltata for use in tropical forest restoration

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Journal of Forestry Research 2014年第4期25卷 897-901页

作者： Cassie R.rodrigues bernard F.rodrigues Department of Botany Goa University Goa 403206 India

We used pre-sowing treatments v/z., soaking seeds in concen- trated sulphudc acid （CSA）, gibberellic acid （GA）, combined treatment of CSA ＋ GA and mechanical scarification to overcome seed dormancy and enhance synchronous germination of Macaranga peltata seeds. We analysed percent seed germination data by logistic regression and con- finned that except in GA treatment, time and acid concentration together were crucial for enhancing germination. The combination treatment of CSA and GA resulted in higher percent germination （up to 74%） than either treatment used separately, but produced defective seedlings （26%）. Mechanical scarification of seed coat had the greatest impact in enhanc- ing germination （78%） and reducing imbibition time （6 days） against the control （0%）. Germination studies and SEM analysis confirmed that seed germination in M. peltata was inhibited by seed coat dormancy.

关键词： dormancy gibberellic acid (GA) mechanical scarification restoration seed coat

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Nano-fried-eggs： Structural, optical, and magnetic characterization of physically prepared iron-silver nanoparticles

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Nano Research 2018年第11期11卷 6074-6085页

作者： Julien Ramade Nicolas Troc Olivier Boisron Michel Pellarin Marie-Ange Lebault Emmanuel Cottancin Vitor T. A. Oiko Rafael Cabreira Gomes Varlei rodrigues Matthias Hillenkamp Univ. Lyon Universitd Claude Bernard Lyon I CNRS UMR5306 Institut Lumiee Matiee t=-69622 Villeurbanne France Instituto de F[sica Gleb Wataghin UNICAMP CP 6165 13083-970 Campinas SP Brazil

The prospect of combining both magnetic and plasmonic properties in a single nanoparticle promises both valuable insights on the properties of such systems from a fundamental viewpoint and numerous possibilities for technological applications. However, the combination of two of the most prominent metallic candidates—iron and silver—has presented numerous experimental difficulties because their thermodynamic properties impede miscibility and even coalescence. Herein, we present the thorough characterization of physically prepared Fe50Ag50 nanoparticles embedded in carbon and silica matrices via electron microscopy, optical spectroscopy, magnetometry and synchrotron-based X-ray spectroscopy. Iron and silver segregate completely into structures resembling fried eggs, with a nearly spherical, crystallized silver part surrounded by an amorphous structure of iron carbide or oxide, depending on the environment of the particles. Consequently, the particles exhibit both plasmonic absorption corresponding to the silver nanospheres in an oxide environment and a reduced but measurable magnetic response. The suitability of such nanoparticles for technological applications is discussed from the viewpoint of their high chemical reactivity with their environment.

关键词： nanoalloy bimetallic nanoparticles iron silver FeAg optical spectroscopy magnetometry

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HIV感染妇女的分娩模式:对2000—2004年同所医院358例患者的回顾性研究(法)

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世界核心医学期刊文摘（妇产科学分册） 2006年第10期2卷 39-39页

作者： rodrigues A. Faucher P. Batallan A. 朱晓明 Service de gynécologie-obstétrique maternitéAline-de-Crépy hpital Bichat-Claude-Bernard 46 rue Henri-Huchard 75018 Paris France

Objective: Evaluate the mode of delivery of HIV-infected women and the risk of mother-to-child transmission. Patients and methods: A retrospective study conducted on HIV-infected women who delivered at the maternity ward of Bichat Hospital in Paris between 1st January 2000 and 31st December 2004. Pregnancy care, antiretroviral therapy, decision of the mode of delivery and neonate treatment were conformable to the French recommendations. Results: The analysis was performed on 332 cases out of 358 pregnancies followed during this period. 75%received a Highly Active Anti Retroviral Therapy(HAART), 24%an AZT monotherapy and 1%did not receive any antiretroviral treatment. Plasmatic HIV viral load was under the level of detectability(50 copies/ml) for 64,6%of women under HAART and 28,7%of women under AZT monotherapy. Only 31,7%of women under HAART delivered vaginally. 44,7%of women under HAART with undetectable viral load at the moment of delivery delivered vaginally. 59,5%of women who were allowed to deliver vaginally had finally a vaginal delivery. 332 women gave birth to 341 babies with 9 twin pregnancies and one still-birth at 22 WA. Out of these 340 babies, 3 babies whose mother received HAART were HIV infected(2 in utero and 1 per-partum). Discussion and conclusion: The reasons why only one third of HIV-infected women could deliver vaginally in this study are primarily the persistence of a detectable HIV viral load under HAART. Women’s choice of the mode of delivery comes next, which depends on the quality of the counselling about the benefits and risks of the cesarean section in the context of HIV infection. The third reason is obstetrical contra indications to vaginal delivery in the context of HIV infection. In the future, it is possible to reduce the incidence of cesarean section in HIV-infected women by elevating the level of HIV plasmatic viral load which allowed vaginal delivery(1000 copies/ml), by improving the observance to antiretroviral treatment, by adap

关键词： HIV感染阴道分娩剖宫产分娩新生儿感染病毒载量产科病房双胎妊娠宫内感染抗逆转录病毒

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