Clinical and Diagnostic Value of ABCDE Stress Echocardiography With Exercise in Patients With Myocardial Infarction.

Aim: Evaluation of the clinical and diagnostic role of stepwise stress echocardiography (Stress Echo) with exercise using the ABCDE protocol in patients with myocardial infarction (MI).

Material And Methods: This single-site study included 75 patients (mean age 61.6±9.

Development, study, and comparison of models of cross-immunity to the influenza virus using statistical methods and machine learning.

Introduction: The World Health Organization considers the values of antibody titers in the hemagglutination inhibition assay as one of the most important criteria for assessing successful vaccination. Mathematical modeling of cross-immunity allows for identification on a real-time basis of new antigenic variants, which is of paramount importance for human health.

Materials And Methods: This study uses statistical methods and machine learning techniques from simple to complex: logistic regression model, random forest method, and gradient boosting.

Synthesis, mol-ecular and crystal structures of 4-amino-3,5-di-fluoro-benzo-nitrile, ethyl 4-amino-3,5-di-fluoro-benzoate, and diethyl 4,4'-(diazene-1,2-di-yl)bis-(3,5-di-fluoro-benzoate).

The crystal structures of two inter-mediates, 4-amino-3,5-di-fluoro-benzo-nitrile, CHFN (), and ethyl 4-amino-3,5-di-fluoro-benzoate, CHFNO (), along with a visible-light-responsive azo-benzene derivative, diethyl 4,4'-(diazene-1,2-di-yl)bis-(3,5-di-fluoro-benzoate), CHFNO (), obtained by four-step synthetic procedure, were studied using single-crystal X-ray diffraction. The mol-ecules of and demonstrate the quinoid character of phenyl rings accompanied by the distortion of bond angles related to the presence of fluorine substituents in the 3 and 5 () positions. In the crystals of and , the mol-ecules are connected by N-H⋯N, N-H⋯F and N-H⋯O hydrogen bonds, C-H⋯F short contacts, and π-stacking inter-actions.

A 1:1 flavone cocrystal with cyclic trimeric perfluoro--phenyl-enemercury.

The title compound, systematic name tris-(μ-perfluoro--phenyl-ene)(μ-3-phenyl-4-chromen-4-one)--trimercury, [Hg(CF)(CHO)], crystallizes in the monoclinic 2/ space group with one flavone (FLA) and one cyclic trimeric perfluoro--phenyl-enemercury (TPPM) mol-ecule per asymmetric unit. The FLA mol-ecule is located on one face of the TPPM acceptor and is linked in an asymmetric coordination of its carbonyl oxygen atom with two Hg centers of the TPPM macrocycle. The angular-shaped complexes pack in zigzag chains where they stack two alternating TPPM-TPPM and FLA-FLA stacking patterns.

Crystal structure and characterization of a new one-dimensional copper(II) coordination polymer containing a 4-amino-benzoic acid ligand.

A Cu coordination polymer, -poly[[[aqua-copper(II)]-bis-(μ-4-amino-benz-o-ato)-κ :;κ :] monohydrate], {[Cu(ABA)(HO)]·HO} (ABA = -amino-benzoate, CHNO ), was synthesized and characterized. It exhibits a one-dimensional chain structure extended into a three-dimensional supra-molecular assembly through hydrogen bonds and π-π inter-actions. While the twinned crystal shows a metrically ortho-rhom-bic lattice and an apparent space group , the true symmetry is monoclinic (space group 2/), with disordered Cu atoms and mixed roles of water mol-ecules (aqua ligand/crystallization water).