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All › Algae › Lichens

Lichens (1)

    Articles on Lichens

    1. Fine spatial pattern of an epiphytic lichen species is affected by habitat conditions in two forest types in the Iberian Mediterranean regio...
      Rocío R Belinchón, Isabel I Martínez, ... Marcelino M De la Cruz

      Fungal Biol 115(12):9 (2011) PMID 22115446

      We suggest that the presence and abundance of epiphytes may reflect their dispersal ability, which is primarily determined by the spatial structure of host trees, but also by host quality. To our knowledge there has been no explicit test of the importance of host tree spatial pattern for epiphytes i...
    2. Evaluation of the antischistosomal activity of sulfated α-D-glucan from the lichen Ramalina celastri free and encapsulated into liposomes.
      R V S Araújo, M R Melo-Júnior, ... N S Santos-Magalhães

      Braz J Med Biol Res 44(4):311-8 (2011) PMID 21344137

      The antischistosomal activity of the sulfated polysaccharide α-D-glucan (Glu.SO(4)) extracted from Ramalina celastri was evaluated after encapsulation into liposomes (Glu.SO(4)-LIPO) in Schistosoma mansoni-infected mice. The effect of treatment with Glu.SO(4) and Glu.SO(4)-LIPO (10...
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    3. Airborne chemical elements: correlation between atmospheric levels and lichen content
      Abel OM Carvalho and Maria do Carmo Freitas

      IJENVH 5(1-2):134-147 (2011)

      Concentrations of As, Cd, Co, Na, Sb, Se and Zn have been measured in atmospheric particulate matter and Parmelia sulcata Taylor transplants at a suburban and industrial area. Levels in particulate matter were found to be much lower than European target values, Californian Acute Inhalation Reference...
    4. Evaluation of atmospheric particle dispersion at a contaminated mine using biomonitors
      Hossain M Anawar, Nuno Canha, and Maria do Carmo Freitas

      IJENVH 5(1-2):84-92 (2011)

      This study has carried out the assessment of magnitude of toxic elements contamination in and around the Sao Domingos mining area, a copper-sulphide open pit mine, and atmospheric transport of above elements by using lichens and Instrumental Neutron Activation Analysis (INAA). Samples of the epiphyti...
    5. Fractal dimension of color fractal images.
      Mihai Ivanovici and Noël Richard

      IEEE Trans Image Process 20(1):227-35 (2011) PMID 20643608

      We also propose an extension of the existing algorithm for the generation of probabilistic fractals, in order to obtain color fractal images. Then we show the results of our experiments and conclude this paper....
    6. Elemental composition analysis in lichens transplanted to the western region of Catamarca, Argentina
      Raquel Clara Jasan, Carolina Beatriz Mohaded Aybar, ... Martha Susana Ca?as

      IJENVH 5(4):304-317 (2011)

      Thalli of the lichen Parmotrema austrosinense were collected in their natural non-polluted habitat and transplanted to 18 monitoring sites within an area of the western region of Catamarca province (Argentina) where fruticose lichens are absent. This region is going through a reactivation phase, owin...
    7. Abstracting biology for engineering design
      Jacquelyn KS Nagel, Robert L Nagel, and Robert B Stone

      IJDE 4(1):23-40 (2011)

      The natural world provides numerous cases for analogy and inspiration in engineering design. Biological organisms, phenomena and strategies provide insight into sustainable and adaptable design and offer engineers billions of years of valuable experience, which can be used to inspire engineering inno...
    8. Investigation of associations between chemical element contents in native lichens and childhood leukaemia
      Maria do Carmo Freitas and Maria Martinho

      IJENVH 5(1-2):125-133 (2011)

      We have extended this work to 22 chemical elements using data from a lichen survey held in 1993 in Continental Portugal and childhood leukaemia death counts in 275 counties for the period 1991?1998. Kriging models were used to estimate lichen biomonitoring measurements at the county level. Bayesian...
    9. Dynamics of element accumulation and release of Flavoparmelia caperata during a long-term field transplant experiment
      RM Godinho, Tona G Verburg, ... Hubert T Wolterbeek

      IJENVH 5(1-2):49-59 (2011)

      This paper addresses the dynamics of accumulation and release of atmospheric elements in lichen thallus, relating to retention times. The experiment assessed the rates of change of element concentrations in Flavoparmelia caperata collected from a clean site, transplanted to a polluted site and then b...
    10. J. M. Despréaux' lichens from the Canary Islands and West Africa: an account of a 19th century collection found in an English archive.
      Begoña Aguirre-Hudson, Isabella Whitworth, and Brian M Spooner

      Bot J Linn Soc 166(2):185-211 (2011) PMID 21941694

      This is an historical and descriptive account of 28 herbarium specimens, 27 lichens and an alga, found in the archives of Charles Chalcraft, a descendant of the Bedford family, who were dye manufacturers in Leeds, England, in the 19th century. The lichens comprise 13 different morpho...