Effects of temperature and percentage of organic modifier were studied on retention and selectivity in RP-HPLC using solvation parameter model. The system constants were determined by multiple linear regression analysis from experimental values in the retention factor for a group of different solutes with known descriptors by computer using the program SPSS/PC. The experimental results showed t...

An asphalt binder (PG 64?22) is modified with a crystallizable copolymer of polypropylene (PP) and polyethylene (PE) to enhance its ability resist rutting in flexible pavements during periods warm weather. After cooling binders from the mixing temperature at controlled rate 3 °C/min, their microstructure rheological behavior are characterized. The asphalts exhibit two-phase morphology droplets ...

Abstract Molybdenum disulfide (MoS 2 ) is an effective friction modifier that can be formed on surfaces from oil-soluble lubricant additives. Different additive chemistries used to form MoS a surface. The tribofilms three different molybdenum additives (MoDTC Dimer, MoDTC Trimer, and molybdate ester) were studied in monoblends fully formulated systems. resulting then characterized by Raman spec...

About 10 years have elapsed since the first whole-genome scanning studies in the mouse to identify loci that affect susceptibility or resistance to tumorigenesis. In that time, >100 cancer modifiers have been mapped, and four strong candidate genes have been identified. Cancer modifier loci affect almost all types of mouse tumorigenesis, with some loci acting on the entire tumorigenic process, ...

Genetic background affects the susceptibility to mammary tumor development in Apc(Min/+) mice. Here we report the identification of four novel modifier loci that influence different aspects of mammary tumor development in Apc(Min/+) mice. Analysis of tumor development in a backcross of (FVBB6 Apc(Min/+)) x B6 Apc(Min/+) mice has identified a modifier on chromosome 9 that significantly affects t...

Modifying the surfaces of metal nanoparticles with self-assembled monolayers of functionalized thiols provides a simple and direct method to alter their surface properties. Mixed self-assembled monolayers can extend this approach since, in principle, the surfaces can be tuned by altering the proportion of each modifier that is adsorbed. However, this works best if the composition and microstruc...

Chitosan is a promising polymer from natural polysaccharides, which an environmentally friendly compound renewable raw materials. has biodegradability, biocompatibility, and antibacterial other activities. In this article, we report the biodegradation control of chitosan materials by use random copolymers based on glycidyl methacrylate (fluoro)alkyl methacrylates as surface modifiers. We show t...

The thermo-optic coefficient (dn/dT) of inorganic–organic hybrid material films prepared by the sol-gel process of organoalkylsilanes is measured using a prism coupler equipped with a hot stage. The effect of the organic modifier on the variation of dn/dT in inorganic–organic hybrid material films has been investigated. The value of dn/dT becomes more negative with increasing molecular weight o...

The use of a new method operational life increase the transport means parts due to introduction polymer-based modified materials has been substantiated in paper under discussion. It is shown that matrices based on epoxy diane oligomers quite promising direction protective coatings formation. Some active additives have applied improve properties preliminary stage their maleinic anhydride modifie...