Twenty-three stream segments (seven on O'ahu, eight on Kaua'i, and eight on Hawai'i) were sampled for macroalgae in the Hawaiian Islands. Stream segments ranged greatly in size from 1.2 to 40 m in width. Water temperature was uniformly warm (17-24°C), but other chemical parameters differed from site to site (pH 5.5-8.9, specific conductance 20-200 IlS . cmI ). Mean species richness per site was...

Concentrations of total aluminium (Al) and iron (Fe) were determined in Lake Loskop over a period of four months in 2009 in samples of phytobenthos, phytoplankton, macroinvertebrates, amphibians and fish. The highest concentrations of Al and Fe were measured in the filamentous algae Spirogyra fluviatilis (Hillse) and Spirogyra adanata (Kütz), (Al=18,997.5mgkg(-1) dry weight and Fe=22,054.2mgkg(...

The nesting and foraging behaviours of the Common Coot Fulica atra were studied in wetlands Viluppuram District, Tamil Nadu during breeding season. A total 4,054 individuals including 467 juveniles 1,327 nests enumerated. Of nests, 1,191 built on Ipomoea carnea vegetation 136 open water. birds used twigs various parts eight other plant species as nest material. elliptical shape, with flattened ...

The present work focuses on the optimization of energy conversion process and use algal resources for biodiesel production with ultrasound microwave techniques in Oedogonium, Oscillatoria, Ulothrix, Chlorella, Cladophora, Spirogyra first time. fuel properties are investigated to optimize efficiency newly emerging feedstock. study indicates that optimized technique improves lipid extraction (38....

Abstract The formation of ordered dolomite under Earth's surface conditions remains a challenge, although many researchers have now shown that microbes can facilitate the precipitation this common mineral. This study provides first evidence biomineralization by green alga Spirogyra (Zygnematales, Chlorophyta), globally dispersed lacustrine genus. Microbial mats formed occur in hyperalkaline and...

The freshwater alga Spirogyra porticalis (Muell.) Cleve, a filamentous charophyte, collected from the Indian trans-Himalayan cold desert, was identified on the basis of morpho-anatomical characters. Extracts of this alga were made using solvents of varying polarity viz. n-hexane, acetonitrile, methanol and water. The antioxidant capacities and phenolic profile of the extracts were estimated. Th...

The present work deals with the optimization of process parameters in situ transesterification dry spirogyra Algae–Jatropha powder along engine efficiency and combustion analysis prepared biofuel. Three operational parameters, namely catalyst concentration (0–5 wt.%), methanol to algae–Jatropha curcas (v/v) (20–60%), reaction time (60–180 min) at a constant temperature 50 °C, were selected. Res...