Polymers (Basel)
November 2022
In order to increase the thermal stability of olefin polymerization precatalysts, new titanium(IV) complexes with diolate ligands differing in the degree of steric hindrances were synthesized from readily available precursor (±)camphor. The structures of the complexes were established by X-ray diffraction. Complexes in the presence of an activator {EtAlCl + BuMg} catalyzed the synthesis of UHMWPE with an M up to 10 million and a productivity of up to 3300 kg/mol·atm·h.
View Article and Find Full Text PDFPolymers (Basel)
October 2022
A series of bis(phenoxy-imine) (FI) titanium(IV) and zirconium(IV) complexes have been synthesized. The effect of the nature of the activator (MAO, combinations EtAlCl + BuMg and iBuAl + [PhC][B(CF)]) on the catalytic activity and properties of the resulting polymers was studied. It was found that Ti-Fi complexes, despite the nature of the outgoing ligands (Cl or iPrO) in the presence of Al/Mg activators, effectively catalyze the polymerization of ethylene (with the formation of UHMWPE); copolymerization of ethylene with 1-octene (with the formation of ultra-high molecular weight copolymers); and the ternary copolymerization of ethylene, propylene and 5-vinyl-2-norbornene (with the formation of polyolefin elastomers).
View Article and Find Full Text PDFObesity and type 2 diabetes are both significant contributors to the contemporary pandemic of non-communicable diseases. Both disorders are interconnected and associated with the disruption of normal homeostasis in adipose tissue. Consequently, exploring adipose tissue differentiation and homeostasis is important for the treatment and prevention of metabolic disorders.
View Article and Find Full Text PDFObesity is a key health problem and is associated with a high risk of type 2 diabetes and other metabolic diseases. Increased weight as well as dysregulation of adipocyte homeostasis are the main drivers of obesity. Pathological adipogenesis plays a central role in obesity-related complications such as type 2 diabetes, hypertension and others.
View Article and Find Full Text PDFAim: To study polyvascular disease in patients with myocardial infarction (MI) and chronic kidney disease (CKD).
Materials And Methods: A total of 954 patients older than 18 years old with ST-segment elevation MI (STEMI) up to 24 hours of pain onset were included in the study. Clinical and demographic data were collected for all patients, including physical examination, 16-lead electrocardiogram recording, echocardiography, laboratory assessment with the measurements of cardiospecific enzymes and serum creatinine.