Harmful algal blooms have caused enormous damage to the marine ecosystem and the coastal economy in China. In this paper, a bacterial strain B1, which had strong algicidal activity against Phaeocystis globosa, was isolated from the coastal waters of Zhuhai in China. The strain B1 was identified as Bacillus sp. on the basis of 16S rDNA gene sequence and morphological characteristics. To evaluate...

This work shows the results of biosynthesis silver nanoparticles using microalga Chlorella sp, growth media with different concentrations glycerol, between 5%–20%, and light temperature conditions. The synthesis was studied supernatants pellets from autotrophic, heterotrophic mixotrophic cultures microalga. presence verified by ultraviolet-visible spectroscopy samples showing highest concentrat...

Polusi logam berat dan implikasinya bagi kesehatan manusia lingkungan telah menyebabkan meningkatnya minat untuk mengembangkan pendekatan bioteknologi lingkungan. Lima berat, antara lain arsenik (As), timbal (Pb), merkuri (Hg), cadmium (Cd), kromium (Cr) bersifat karsinogenik serta menunjukkan toksisitas walaupun dalam jumlah yang sedikit dapat mengancam ekologi manusia. Mikroalga memiliki bebe...

Various methods, including autoclaving, bead-beating, microwaves, sonication, and a 10% NaCl solution, were tested to identify the most effective cell disruption method. The total lipids from Botryococcus sp., Chlorella vulgaris, and Scenedesmus sp. were extracted using a mixture of chloroform and methanol (1:1). The lipid contents from the three species were 5.4-11.9, 7.9-8.1, 10.0-28.6, 6.1-8...

We studied the effects of Heterosigma akashiwo, a harmful algal species, in the diet of juvenile Manila clams (Ruditapes philippinarum), because it often blooms in coastal waters where aquaculture of the clams is carried out. Weight of soft tissue of clams increased when they were fed H. akashiwo added at 8,000 cells mL-1, with weight growth about 8% higher than that of clams fed only Chaetocer...

releasing of textile dye effluents into general water bodies is a major environmental and healthproblem. color removal, in particular, has recently become of major scientific interest, as indicated by themultitude of related research reports. during the past two decades, several physico-chemical decolorizationtechniques have been reported, few, however, have been accepted by the textile industr...