Silyl and acetyl derivatives of sporopollenin from the pollen of Typha angustifolia L. were prepared. The derivatized products were readily soluble in piperidine-d11 and could be investigated employing one- and two-dimensional proton and carbon NMR (nuclear magnetic resonance) spectroscopy (1H,1H-COSY and 13C,1H-HETCOR techniques). For the first time, a two dimensional 13C,1H-HETCOR NMR spectru...

The southern region of the Paria Peninsula shows a high malaria incidence. This work relates the abundances of cyclopoid species and the malaria vector Anopheles aquasalis to certain abiotic parameters and vegetation features. Samples were collected over a 4-month period in several habitats, including marsh, irrigation channel, lagoon, and mangrove swamp during the wet season and the wet-dry tr...

Pukepuke Lagoon is one of a series of shallow dune-lakes in the Manawatu district of New Zealand. Its open water area has been reduced by about 90% during the last century by sand drift from adjacent dunes, man-made changes to the local drainage, and the spread of macrophytes) especially Typha, Superimposed upon these changes are others due to the influx of exotic plants and animals. The vegeta...

Phragmites australis (ssp australis) is an aggressive colony-forming species that displaces emergent vegetation in North America, including native bulrushes (Schoenoplectus sp.) and both invasive cattails (Typha sp.). expansion can alter habitat negatively affect reptiles, amphibians, birds; less known about Phragmites’ utility as fish its impact on communities freshwater coastal wetlands. To a...

The Typha leaf has a structure of lightweight cantilever beam, exhibiting excellent mechanical properties with low density. Especially, the leaf blade evolved high strength and low density with high porosity. In this paper, the structure of Typha leaf was characterized by microcomputed tomography (Micro-CT) and scanning electron microscopy (SEM), and the relationship with flexural properties wa...

One of the burning problems of our industrial society is the high consumption of water and the high demand for clean drinking water. Numerous approaches have been taken to reduce water consumption, but in the long run it seems only possible to recycle wastewater into high quality water. In this study, an attempt was made to compare the efficiency of aquatic macrophytes like Typha sp., Eichhorni...

WHIGHAM, D. F., T. E. JORDAN AND J. MIKLAS (Smithsonian Environmental Research Center, Box 28, Edgewater, MD 21037). Biomass and resource allocation of Typha angustifolia L. (Typhaceae): The effect of within and between year variations in salinity. Bull. Torrey Bot. Club 116: 364-370. 1989.-In a brackish wetland dominated by Typha angustifolia, we found similar aboveground and belowground produ...

BACKGROUND Heavy metals like Cu, Cd, Pb, Ni, Co and Cr can naturally be found almost all over this planet in various amounts. Urban activities such as heavy metal industry, traffic and waste can rapidly increase the metal concentrations in a fresh water ecosystem. METHODS This study was done in natural conditions to capture as many aspects in heavy metals pollution and bioremediation of Nicol...