The present invention relates to the isolation, in vitro propagation, and transplantation and integration of non-pigmented retinal stem cells derived from the neuroretina of the eye, ex vivo and in vivo. The element analyzer D further includes a cleaning-agent injection member 2 for injecting a cleaning agent W into the combustion section 1. The upper housing also includes a lower housing seat. The housing terminating part forms an element receiving device having a fluid passage concentric to the longitudinal axis. The apparatus receives an information word and encodes the information word into a block LDPC code based on one of a first parity check matrix and a second parity check matrix, depending on a coding rate to be applied when generating the information word into the block LDPC code. The first plate defines a recess.