Genomic diversity of Ac-like transposable elements in sphaerococcum mutant forms of common wheat (Triticum aestivum L.) and triticale (X Triticosecale Witt.).

DNA sequences homologous to the maize Activator (Ac) element are widespread in plant genomes. Nowadays, several reports are available concerning the distribution and characterisation of Ac-homologous sequences in natural populations of different cereal species. but these mobile genetic elements still remain to be comprehensively characterised.

[Nutrition specification for babies with Down syndrome].

Trisomy 21 is the most frequent chromosomal disorder. Each year in Bulgaria 100-120 babies with this syndrome are born. These children have anatomical and physiological specialties.

Experimental immune oophoritis as a model for studying the thymus-ovary interaction: 1. Morphological studies.

The experimental immune oophoritis (EIO) model was used to study the functional relationship between the ovary and organs of the immune system. EIO was developed in Balb/c mice by twofold subcutaneous injection of saline ovarian extract in complete Freund's adjuvant. The ovary, thymus, and spleen were investigated histologically, histoautoradiographically, and electromicroscopically on days 7, 14, 21, and 28 after immunization.

[Production of an enriched factor VIII reagent].

An enriched factor VIII preparation was produced from cryoprecipitates by means of dextran. Cleaning was made in two phases: In the first phase the fibrinogen was precipitated and in the subsequent second phase the same was done with antihaemophilic globulin. By comparing the quantity and the degree of enrichment gained from the precipitation with dextran and with polyaethylenglycol, the conclusion can be made that both procedures virtually lead to the same results.