Secondary structure analysis of proteins within the same topology group.

The native conformation of a protein plays a decisive role in ensuring its functionality. It is established that the spatial structure of proteins may exhibit a greater degree of conservation than the corresponding amino acid sequences. This study aims to clarify structural distinctions between homologous and non-homologous proteins with identical topology.

The Effect of the Microstructure and Viscosity of Modified Bitumen on the Strength of Asphalt Concrete.

The purpose of these studies was to establish the influence of the microstructural and rheological characteristics of modified bitumen compositions on the strength indicators of asphalt concrete. The effect of additives concentration on the rheological characteristics and microstructure of binary "bitumen-surfactant", "bitumen-AG-4I", and ternary "bitumen-AG-4I-AG-4I" systems has been studied. To assess the effect of bitumen dispersion on the physical and mechanical characteristics of modified asphalt concrete samples, the compressive strength value was determined.

Increasing the Adhesion of Bitumen to the Surface of Mineral Fillers through Modification with a Recycled Polymer and Surfactant Obtained from Oil Refining Waste.

The purpose of this study was to optimize the processes of wetting fillers by varying the content of such additives as a surfactant and polymer in bitumen-mineral compositions in order to achieve optimal performance. The cosine of the contact angle was used as a criterion for assessing the adhesion of the bitumen binder to the surface of crushed stone. The effect of the additives' concentration on surface tension and adhesive efficiency in binary and ternary bitumen compositions was studied.

[Moscow scientific schools on the field of internal medicine in the second half of the XIX - early XX centuries: comparative characteristics].

Peculiarities and comparative characteristics of three main Moscow schools on the field of internal medicine of the second half of the XIX - early XX centuries are discussed: schools of Grigory Zakharyin, Alexey Ostroumov and Vassily Shervinsky - Leonid Golubinin; the legitimacy to acknowledge scientific clinical schools of Mikhail Cherinov and Nikolay Golubov is disputed. The arguments are provided that of the Moscow therapeutic schools, it was the Shervinsky-Golubinin school, and not the Zakharyin or Ostroumov school, that played the most significant role in the formation of the internal medicine in the USSR, in passing the accumulated knowledge and ideas to therapeutic elites in the USSR.

[Ankle distraction hinged motion arthroplasty in the Ilizarov frame].

Objective: To study distraction hinged motion arthroplasty of the ankle joint in combined treatment of osteoarthritis in terminal stages.

Material And Methods: Ankle distraction hinged motion arthroplasty in the Ilizarov frame was performed in 10 patients with terminal post-traumatic osteoarthritis (mean age 54±6.2 years).