in this paper, we introduce and study the concept of $r$-fuzzy regular semi open (closed) sets in smooth topological spaces. by using $r$-fuzzy regular semi open (closed) sets, we define a new fuzzy closure operator namely $r$-fuzzy regular semi interior (closure) operator. also, we introduce fuzzy regular semi continuous and fuzzy regular semi irresolute mappings. moreover, we investigate the ...

Retroviral pseudotype vector, derived from the murine leukaemia virus carrying the HIV-1 envelop protein MLV (HIV-1) were produced using a integrated, continuous cultivation and harvest process. A 200ml fix bed reactor was used to cultivate the anchorage dependent packaging cell line on macro-porous carriers until the maximum glucose uptake was reached. After starting the cultivation in batch m...

The possibility of using photosynthetic microorganisms, such as cyanobacteria and microalgae, for converting light and carbon dioxide into valuable biochemical products has raised the need for new cost-efficient processes ensuring a constant product quality. Food, feed, biofuels, cosmetics and pharmaceutics are among the sectors that can profit from the application of photosynthetic microorgani...

In recent years the technique for the continuous cultivation of microorganisms has been adapted for a variety of uses. Gerhart (1946) and Barnes and Dewey (1947) have reported on the advantage of continuous cultivation over conventional methods for obtaining increased yields of bacterial cells, and von Hofsten et al. (1953) have extended the method to the cultivation of fungi. Continuous cultiv...