Bu çalışmada; Trakya Bölgesi iç sularından (Bahçedere Çayı, Tekirdağ, Türkiye) izole edilen, moleküler taksonomi yöntemleri ile tanımlaması yapılan KF470792 Kabul No’lu Desmodesmus communis (E. Hegewald) E. Hegewald (Sphaeropleales) mikroalg türü için kültür ortamı ve büyüme şartları belirlenmiştir. Bu mikroalg türü, belirlenen şartlar altında (besin, pH, sıcaklık, ışık yoğunluğu ve havalandırma) kültüre edilmiş ve durgunluk fazına ulaşan kültürden besinsel ve biyokimyasal analizler için yeterli miktardaki biyokütle hasat edilerek; toplam protein, toplam yağ miktarları ile yağ asitleri ve aminoasitleri, E vitaminleri çeşit ve miktarları belirlenmiştir. Türün BG11 besin ortamında (7,5 pH, 24±2ºC, 500 ml/dak. havalandırma) 9,76x105 koloni/ml hücre yoğunluğuna, 0,762 g/l kuru biyokütle ağırlığına, 13,3 mg/l toplam klorofil a miktarına ulaştığı belirlenmiştir. Biyokütle üzerine yapılan biyokimyasal analizler sonucunda; ağırlıkça %42,59 toplam protein, %5,23 toplam yağ ve 3694,24 µg/gyağ vitamin E miktarına sahip olduğu saptanmıştır. Yağ asitleri içinde en yüksek oranın %35,18 ile linolenik asit olduğu saptanmıştır. Aminoasitler içinde en yüksek miktarda bulunan glutamik asit, 46,9 mg/g olarak belirlenmiştir.

Microalgae, also called phytoplankton by biologists, are very small plant-like organisms with a diameter of 1-50 micrometers without roots, stem and leaves. Microalgae, which have hundreds of thousands of species in both fresh waters and seas, form the lowest link of the food chain in aquatic ecosystems. Most species contain chlorophyll, use sunlight as an energy source, and convert carbon dioxide into biomass (biomass). Because of their role in the photosynthesis process, microalgae produce most of the oxygen in the atmosphere. It has a very wide biodiversity and is reported to contain more than 200 thousand species. As a result of genetic analysis, a continuous increase in microalgae species is observed. More than 15 thousand new chemical compounds have been discovered from algae in recent years. It has been observed that most of the bio compounds obtained from microalgae have antiviral effects. However, although extensive research has been done on the antibacterial, antioxidant and antifungal effects of these bioactive compounds, there is limited research on their antiviral effects. In these limited number of studies on the antiviral effects of microagines, it has been reported that some biocompounds isolated from algae may be effective against viruses that are the cause of diseases such as “HIV, SARS and AIDS”. However, the number of researches on viruses that cause today's biggest pandemic, such as coronavirus, of different biocompounds isolated from microalgae, is very small. To date, no vaccine that can be effective against the COVID-19 virus or a drug that can inhibit the reproduction of the virus has not been found. It is thought that micro or macro algae may be one of the most promising natural resources in solving this global health problem. Because Spirulina, which is a microalgae, has antiviral, anticancer, antidiabetic, antibiotic, antioxidant, prebiotic, cardiovascular system protective and antiallergic effects and these positive effects are caused by bioactive compounds found in high content (Rosales-Mendoza et al., 2020a). In this review, especially the antiviral effects of microalgae were tried to be summarized and it was tried to be emphasized that algae could be promising natural resources in the development of new antiviral drugs by our country's scientists.

Colour is one of the major features that fascinate the customers and makes the foods more allurement. Due to changes of customer demands and countries’ legislations, usage of synthetic colorants is being decreased every day and food industry tends to use natural colorant. Algae have recently gained importance owing to a sustainable natural source of colorant. Algae can rapidly increase their biomass compared to plants thus they produce more pigments. This review covers the subjects about the functional properties and usage areas of natural colorants obtained from algae; phycocyanin, phycoerythrin, astaxanthin, canthaxanthin, β-carotene, lutein, fucoxanthin.