Longitudinal follow-up of tinnitus complaints.

Objective: To investigate the long-term outcome of patients with tinnitus, the long-term effects of cognitive behavioral therapy, and what properties of tinnitus predict distress at follow-up.

Design: A longitudinal follow-up of a consecutive sample of patients with tinnitus initially seen by a clinical psychologist.

Setting: Department of Audiology, University Hospital, Uppsala, Sweden.

Alternative surfaces for microcarrier culture of animal cells.

As part of an effort to broaden the applicability and efficiency of microcarrier cell culture various alternative new microcarriers were synthesized. The microcarriers were compared as substrates for the growth of several types of cells and with respect to binding of proteins from the culture medium. Cross-linked dextran has been found to be the most suitable material for a microcarrier matrix and was used as the matrix for the new microcarriers.

Alternative surfaces for microcarrier culture of animal cells.

As part of an effort to broaden the applicability and efficiency of microcarrier cell culture various alternative new microcarriers were synthesized. The microcarriers were compared as substrates for the growth of several types of cells and with respect to binding of proteins from the culture medium. Cross-linked dextran has been found to be the most suitable material for a microcarrier matrix and was used as the matrix for the new microcarriers.

A rapid method for purification of human granulocytes using percoll. A comparison with dextran sedimentation.

A simple one-step method for purification of human granulocytes, based on the use of a discontinuous gradient of Percoll, is described. The cell yield is 55% and the purity of the granulocyte fraction is 97%. The cells' ability to exclude trypan blue and phagocytic function are not altered during the purification process.

Microcarriers for animal cell culture: a brief review of theory and practice.

Microcarrier beads for animal cell culture are considered in relation to aspects of cell adhesion and growth. Some "critical parameters" for a successful microcarrier are discussed, comparing currently available materials. The properties most critical for a successful microcarrier were closely fulfilled by the microcarrier CytodexTM 1 which has been used for the successful cultivation of more than 60 different cell types.