Photoregulated or Energy Dependent Process of Hormogonia Differentiation in Nostoc sphaeroides Kützing (Cyanobacterium) Mass Culture Indoors,the Structure of Colony and Analysis of Nutrient Composition of Nostoc sphaeroides Analysis of Biochemical Composition of Nostoc sphaeroides Response of Nostoc sphaeroides(Cyanobacterium) to Low Culture Temperatures