Abstract: The invention relates to a method of preservation of nucleic acid sequences in histological tissues which comprises: treating a concentrated formaldehyde solution in water with basic ion-exchange resins; diluting the resulting acid-deprived formaldehyde solution with phosphate buffer pH 7.2-7.4 up to a concentration ranging between 2 and 4%; contacting the resulting acid-deprived formaldehyde solution obtained with the tissue samples; optionally embedding the samples fixed in paraffin.

Abstract: The invention refers to a composition for the fixation of histological preparations, comprising a solution of glyoxal, wherefrom acids, normally present in the commercially available glyoxal, have been removed. The composition of the invention provides an optimal fixative for the preservation of structure, antigenic components and nucleic acids in tissues. The acid-free glyoxal has limited toxicity, is not considered as a carcinogenic agent and represents a valid alternative to formalin for the fixation of tissues and cells.

Abstract: The invention refers to a composition for the fixation of histological preparations, comprising a solution of glyoxal, wherefrom acids, normally present in the commercially available glyoxal, have been removed. The composition of the invention provides an optimal fixative for the preservation of structure, antigenic components and nucleic acids in tissues. The acid-free glyoxal has limited toxicity, is not considered as a carcinogenic agent and represents a valid alternative to formalin for the fixation of tissues and cells.

Abstract: The invention refers to a container (1) for collecting, transporting and storing biological tissue samples, wherein the container (1) is filled with a first component (3) being a fixative and a second component (4) being a fluid, wherein the second component (3) has a lower specific gravity compared to the fixative (3), and is immiscible with the fixative (3). The second component (4) is stratified on top of the fixative (3) to form a protective film to prevent fixative fumes to escape from the container (1). The invention further relates to a method for collecting, transporting and storing biological tissue samples.

Abstract: The invention refers to a container (1) for collecting, transporting and storing biological tissue samples, wherein the container (1) is filled with a first component (3) being a fixative and a second component (4) being a fluid, wherein the second component (3) has a lower specific gravity compared to the fixative (3), and is immiscible with the fixative (3). The second component (4) is stratified on top of the fixative (3) to form a protective film to prevent fixative fumes to escape from the container (1). The invention further relates to a method for collecting, transporting and storing biological tissue samples.

Abstract: A process for preserving tissues is described which comprises transferring the tissues in a container and evacuating the container.

Abstract: A process for preserving tissues is described which comprises transferring the tissues in a container and evacuating the container.

Abstract: The present invention involves the localization of HER2 receptor (extra-cellular domain) in breast cancer cells, using a humanized monoclonal antibody. The invention is related to a modification of the Herceptin antibody, so as to maintain the antibody properties, while making the antibody directly recognizable in immunohistochemistry.