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The influence of silica fillers with different specific surface areas on the technological and operational properties of protective elastomer compositions has been studied. It has been established that compositions with a more highly dispersed silicic acid filler have a 10% higher Mooney viscosity and a higher dispersing ability in the elastomeric matrix (the complex dynamic modulus characterizing the Payne effect is reduced to 10%) compared to a sample containing a filler with a lower dispersion of equivalent dosage. It was determined that, with equal filling, tread rubber with a filler with greater dispersion is characterized by increased nominal stress at 300% elongation (by 21%), wear resistance, and dry road adherence (mechanical loss tangent values measured at –60 and +20°C, an increase by 21 and 11%, respectively). It was revealed that reducing the dosage of highly dispersed filler leads to the production of vulcanizates with greater elasticity and lower rolling losses while maintaining other car handling parameters. [ABSTRACT FROM AUTHOR]

Recent studies on the characteristics of saliva proteome and peptidome greatly expanded our understanding of this biological fluid. Athough many scientists consider saliva to be an ideal biosubstrate in diagnosis of the human body state; currently, the research in this area is at the data accumulation stage. The physiology of saliva and salivary glands, as well as characteristics of interaction between the saliva proteins and the oral cavity microorganisms, has been insufficiently studied yet. The lack of standardization in collecting the saliva samples and in the proteome research protocols, and the requirements for sample representativeness introduce discrepancies in the results obtained by different researchers. Addressing these problems will allow the wide use of saliva proteome as a complex indicator of the functional state of the human body. [ABSTRACT FROM AUTHOR]