Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A filter material for removing at least one given substance from an at least substantially gaseous medium, such as tobacco smoke, comprises a cross-linked carbohydrate polymer which is swellable to a given degree and which has the form of an open-pore three-dimensional micro-porous network, there being substantially uniformly distributed therein at least one agent able to remove said substance in a substantially selective manner from the medium passing through the filter.

Abstract: A filter material by which substances contained in gaseous or liquid media can be removed comprises a product in the form of a matrix of activated carbon. The product has uniformly dispersed therein at least one metal taken from the group Ca, Mg, Ba, Al, Cu, and the transition metals and is obtained by chemically reacting cations which comprise at least one of said metals from said group with anionic groups chemically bound to a polyhexose derivative.