By H. D. Kumar, H. N. Singh (auth.)
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Additional info for A Textbook on Algae
A provision has also to be made for frequent or continuous agitation ofthe culture suspension so as to prevent the cells from settling down, and to ensure a proper distribution ofnutrients, C02 and light. Tbe open circulation syst~m of mass culture devised by Tamiya (1960) in Japan consists of an open, shallow culture pond containing rotating pipes with numerous fine jets. These jets agitate the culture suspension and keep it enriched with C02. At frequent intervals aliquots of culture suspension are pumped out and the algal cells harvested by centrifugation.
These jets agitate the culture suspension and keep it enriched with C02. At frequent intervals aliquots of culture suspension are pumped out and the algal cells harvested by centrifugation. The harvested cells are washed and dried in vacuum or extracted with methanol to remove the pigments. \ ground in a mill and stored in powdered form. On an average an annua} ECONOMIC IMPORTANCB 41 yield of nearly 13 metric tons per acre can be expected if the cultivation continues throughout the year. Cultivation, harvesting and drying are the three major processes for turning Chlorella into foodstuffs.
The mitospores may be either haploid or diploid and accordingly perpetuate the haploid or the diploid generation. SEXUAL REPRODUCTION Typicalor conventional sexuality consisting of karyogamy and meiosis is brought about by a variety of methods invariably involving the union of the male and the fe male sexes. The reproductive units participating in the sexual fusion are variously named according to the morphology, behaviour, and the nature of the organs in which they are produced. The dictionary meaning of the term gamete is "a germ cell carrying with it the implication ofeither sex", and for sexual reproduction to occur, the gametes ofopposite sexes must be present.
A Textbook on Algae by H. D. Kumar, H. N. Singh (auth.)