Abstract: The invention discloses a method for virus clearance of a cell culture medium, comprising the steps of: i) providing a bulk medium portion, comprising amino acids and glucose, and a first additive portion, comprising vitamins in aqueous solution; ii) subjecting the bulk medium portion to a high temperature short time treatment (HTST); iii) passing the first additive portion through a virus retentive filter or an ultrafilter; and iv) after steps ii) and iii), mixing the bulk medium portion with the first additive portion to obtain a cell culture medium.

Abstract: The invention discloses a bioreactor assembly comprising: a) a plurality of cultivation bags; b) at least one flexible temperature control bag comprising a thermostating fluid, and; c) a tray adapted to rock back and forth around at least one axis, wherein the flexible temperature control bag is mounted on the tray and the cultivation bags are located on the flexible temperature control bag.

Abstract: The invention discloses a flexible bag assembly for cultivation of cells, comprising one or more bags forming a plurality of cultivation compartments, wherein a drain port in at least a first cultivation compartment is adapted to be fluidically connected with a second cultivation compartment upon opening of a valve means. It also discloses a bioreactor with the bag assembly mounted on a rocking tray and a method of cultivating cells in the assembly.

Abstract: The invention discloses a bioreactor with a vessel defining an inner volume, agitation means and at least one addition tube, wherein a delivery orifice in the addition tube is located within the inner volume and a check valve is arranged in proximity of the delivery orifice for allowing flow of a fluid in the direction from the addition tube into the inner volume of the vessel and blocking flow in the reverse direction.

Abstract: The invention discloses a flexible bag for cell cultivation, comprising a cultivation compartment and at least one dialysis compartment, wherein the dialysis compartment(s) is/are delimited from the cultivation compartment by one or more dialysis membranes and is/are fluidically connected to a first and a second port in the bag.

Abstract: Methods for the production of recombinant peptides comprise fermenting cells to produce recombinant peptides. A metal salt is added to a concentrate of the fermented cells after the fermentation step, prior to peptide isolation, thereby reducing the amount of trifulsides formed in the production of the recombinant peptide. In one embodiment, the recombinant peptide is recombinant growth hormone.

Abstract: Methods for the production of recombinant peptides comprise fermenting cells to produce recombinant peptides. A metal salt is added to a concentrate of the fermented cells after the fermentation step, prior to peptide isolation, and the pH of the cell concentrate after the addition of the metal salt is less than or equal to 7, thereby reducing the amount of trifulsides formed in the production of the recombinant peptide, with the proviso that the production does not include conversion of formed trifulside peptide into native peptide form after the addition of the metal salt. In one embodiment, the recombinant peptide is recombinant growth hormone.

Abstract: The invention relates to a method for the production of recombinant peptides by fed-batch cultivation of a microorganism in a bioreactor containing a medium comprising organic carbon source, nitrogen source and mineral salts. The cultivation is carried out by the addition of the organic carbon source by oscillation feed and/or by oscillation variation of stirring speed, e.g. in a square or sinus wave pattern. Preferably the organic carbon source is glucose and the recombinant peptide is growth hormone.

Abstract: The invention relates to a method for the production of recombinant peptides by fed-batch cultivation of a microorganism in a bioreactor containing a medium comprising organic carbon source, nitrogen source and mineral salts. The cultivation is carried out by the addition of the organic carbon source by oscillation feed and/or by oscillation variation of stirring speed, e.g. in a square or sinus wave pattern. Preferably the organic carbon source is glucose and the recombinant peptide is growth hormone.