[Lower jawbone structures symmetry evaluation using cone beam computed tomography].

Objective: To assess the prevalence and quantitative characteristics of skeletal asymmetries of the body and lower jaw branches in three-dimensional space.

Materials And Methods: Using depersonalized data archive, of 400 CBCT scans, forty studies were picked randomly. Patients aged 25 to 35 years participated in research, no history of maxillofacial reconstructive surgery; gender, race, and facial anomaly were ignored.

The Shrinking of the European Union and Its Integration Potential.

On January 31, 2020, the United Kingdom, a country with a population of 67 mln people and the fifth largest economy in the world, left the European Union. The case when a state ceased to be an EU member is the first in the history of European integration. Except for the episode with Greenland, which left the EEC in 1985, the group had invariably expanded before that.

[The use of c-mos nuclear gene as a phylogenetic marker in tetraonidae birds].

A 480-bp fragment of nuclear c-mos gene was sequenced in nine bird species representing four genera of the family Tetraonidae. It was demonstrated that nuclear genome region examined was highly conservative. The data were used to construct phylogenetic relationships among the c-mos gene sequences in Tetraonidae.

[Divergence of the cytochrome b gene in grouse species].

A 720-bp cytochrome b gene fragment of the mitochondrial genome was sequenced in ten species and seven potential subspecies of grouse. Of 187 variable sites detected, 140 were parsimony informative. The distribution of nucleotides in three positions of codons had a similar pattern with and did not fundamentally differ from that of the nucleotide composition of this gene in other animals, including birds.

[Evolution of the mitochondrial DNA cytochrome b gene in Tetraonidae birds].

Mitochondrial fragments containing the cytochrome b gene (1020 bp in size) of four bird species belonging to four genera of the family Tetraonidae (Tetrao parvirostris, Bonasa umbellus, Lagopus lagopus scoticus, and Falcipennis falcipennis) were directly sequenced. Of the 1020 nucleotide positions, 186 were variable and uniformly distributed over the gene and only 46 were parsimony informative. Most substitutions were synonymous.