, inventories, checklists of Malaysian algae, including ecological studies and applied phycology publications were produced. The advancement of gene technology encouraged the ABSTRAK Satu tinjauan keatas 30 tapak pesampelan di Semenanjung Malaysia, mewakili lima jenis habitat,iaitu kolam air panas, tasik air tawar yang mengalami eutrofikasi, kolam kumbahan kilang kelapa sawit, habitat air payau dan habitat air masin, menghasilkan 79 sampel persekitaran. Jumlah keseluruhan 73 taxa dan 52 genera alga dikenalpasti, dengan 9 genera dan 11 taxa Cyanophyta; 25 genera dan 33 taxa Baccilariophyta; 13 genera dan 16 taxa Chlorophyta dan 5 genera dan 13 taxa Euglenophyta. Dari segi bilangan sel, sampel daripada kilang kelapa sawit adalah paling tinggi bilangan selnya. Daripada sampel dipencilkan yang diperolehi daripada sampel yang dikumpulkan, hanya enam genera, iaitu Cyanophyta Cyanosarcina, Chlorophyta Chlorella, Chlamydomonas, Chlorococcum, Scenedesmus dan Euglenophyta Euglena akan dibincangkan dari segi pertumbuhannya dan profil biokimia didalam kertas kerja ini. Chlorococcum dan Euglena mempunyai kadar pertumbuhan spesifik, µ, paling tinggi diikuti oleh Chlorella dan Scenedesmus. Produktiviti biojisim pada hari ke-12 secara amnya adalah lebih tinggi daripada hari ke-8 untuk semua genera. Produktiviti biojisim paling tinggi adalah daripada Chlorella diikuti oleh Chlamydomonas. Produktiviti lemak paling tinggi adalah daripada Chlorella pada hari ke-12. Chlorella mempunyai produktiviti karbohidrat paling tinggi diikuti Chlamydomonas. Chlorella dan Chlamydomonas mempunyai produktiviti protein paling tinggi. Dalam tinjauan pendek ini, terdapat alga tertentu yang telah dikenalpasti dan dipencilkan yang dapat membuktikn ia mempunyai potensi untuk digunakan sebagai bahan asas utama untuk penghasillan bahan api biologi.
This study investigated the effect of co-culturing microalgae with a floc-forming bacterium. Of the six microalgae isolated from a biofloc sample, only Thalassiosira weissflogii, Chlamydomonas sp. and Chlorella vulgaris were propagated successfully in Conway medium. Hence, these species were selected for the experiment comparing microalgae axenic culture and co-culture with the floc-forming bacterium, Bacillus infantis. Results obtained showed that the co-culture had higher microalgae biomass compared to the axenic culture. A similar trend was also observed concerning the lipid content of the microalgae-bacterium co-cultures. The cell number of B. infantis co-cultured with T. weissflogii increased during the exponential stage until the sixth day, but the other microalgae species experienced a significant early reduction in cell density of the bacteria at the exponential stage. This study represents the first attempt at co-culturing microalgae with B. infantis, a floc-forming bacterium, and observed increased biomass growth and lipid accumulation compared to the axenic culture.
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