The present invention relates to oligopeptide-free cell culture media comprising at least 0.5 mg/L of a polyamine and to methods for cultivating cells in said oligopeptide-free cell culture media comprising at least 0.5 mg/L of a polyamine. The invention also relates to methods for expressing at least one protein in a medium comprising at least 0.5 mg/L of a polyamine and to methods for producing at least one virus in a medium comprising at least 0.5 mg/L of a polyamine.

A process includes growing NRB in a nitrate reducing bacteria media to form a NRB culture and combining the NRB culture with a concentrated nitrate solution to form a NRB composition.

A process includes growing NRB in a nitrate reducing bacteria media to form a NRB culture and combining the NRB culture with a concentrated nitrate solution to form a NRB composition.

The ratio of zinc and cadmium is of significance for error-free proliferation and differentiation of cells. An understanding of the role of cadmium in the etiology of cancer offers possibilities to gain a better understanding of cancer as well as possibilities to prevent, treat and/or alleviate cancer. The concentration of Zn(II) in fetal serum, human serum from umbilical cord blood or healthy donors, and in avian serum including intact eggs and egg products has significance for the reliability and repeatability of cell and tissue culture method using said serum, or serum containing products, or eggs. Disclosed is a method in the manufacture of serum products, in particular serum products intended for use in in vitro culture of mammalian cells or tissues, wherein the concentration of Zn(II) is determined, and preferably adjusted to a desired interval. Different products consisting of or containing serum or serum fractions are also disclosed.

The present invention provides a supplement composition and method of preparation thereof for cell culture. The supplement composition comprises natural substances without using any animal based serum. The present invention provides slaughter free, effective and affordable supplement for growth of animal cells that eliminates or minimizes dependency on the fetal bovine serum.

Disclosed are methods for producing protein variants using multiple culture conditions and perfusion production.

A novel cell culture method for inducing differentiation of a pluripotent stem cell into trophoblast and an automatic culture apparatus therefor includes: a first step of culturing the pluripotent stem cell in a presence of a ROCK inhibitor during a first time period; a second step of culturing the pluripotent stem cell, which has been subjected to the first step, without the ROCK inhibitor during a second time period following the first time period; and a step of culturing the pluripotent stem cell, which has been subjected to the second step, in the presence of the ROCK inhibitor during a third time period following the second time period, in which the pluripotent stem cell is cultured in a state of being adhered to a cell culture substrate including a planar mesh through the first to third time periods.

Disclosed are methods for producing protein variants using multiple culture conditions and perfusion production.

The present invention relates to a process for the production of a filamentous fungus whole broth enzyme composition with low viscosity, a genetically modified filamentous fungus for production of the whole broth enzyme composition, the use of such a genetically modified filamentous fungus for the production of the filamentous fungus whole broth enzyme composition with low viscosity and a filamentous fungus whole broth enzyme composition produced by such a method.

The present disclosure discloses a preparation method for hyperthermophilic aerobic fermentation inoculant prepared by using sewage sludge, the method includes the following steps: carrying out fermentation after the activation of hyperthermophilic aerobic bacteria, removing the supernatant from the fermentation products, and adding the protective agent and stirring until uniform, drying to obtain a product, pulverizing the product by a pulverizer, and sieving the product before sub-packing. The solution of the present disclosure has the following advantages.