Laparoscopic intervention in emergency surgery.

The article presents the analysis of the effectiveness of video-laparoscopic ope­rations in patients with emergency surgical pathology of the abdominal organs based on the experience of per­forming 5541 interventions at the clinical bases of the Department of Thoracoabdominal Surgery and the Department of Endoscopy and Surgery of the KhMAPE. The advantages of these interventions in comparison with open laparotomies are shown, the indications for their implementation at the present stage are evaluated

Features of diagnostics of gastroesophageal and duodenogastric reflux in patients with complicated forms of peptic ulcer.

Purpose – to improve the results of surgical treatment of duodenal ulcer due to preoperative diagnosis of concomitant reflux disease and its correction. Before surgery, 46 patients with complicated forms of peptic  ulcer disease underwent pH monitoring and 23 – impedance-pH monitoring. Pathological gastroesophageal reflux was found in 58 cases. Before surgery, esophageal pH monitoring was performed in 46 patients with complicated forms of peptic ulcer disease. Against the background of hyper – and normacidity of the stomach in 39 patients pathological acidic gastroesophageal reflux disease with a significant increase of De Meester index was confirmed. Impedance-pH monitoring was performed before surgery in 23 patients with complicated forms of peptic ulcer and concomitant gastroesophageal reflux. Erosive form of gastroesophageal reflux disease was confirmed endoscopically in all patients with hyperacidity (17) and normal acidity (6) of the stomach. In 19 cases pathological gastroesophageal reflux disease was found. In 13 cases the cause of disorders in anti-reflux barrier was a diaphragmatic hernia of I-II degree. Gastroesophageal reflux disease was caused by increased intragastric pressure due to ulcer stenosis in 6 patients. pH- monitoring in patients with acidic gastroesophageal reflux allows to establish a pathological or physiological reflux. Conducting impedance-pH monitoring allows to determine the number of reflux episodes and their qualitative characteristics (acidic or alkaline; liquid, gas or mixed), as well as to determine the indications for a differentiated approach in the treatment of gastroesophageal reflux

Evidence for Narrow N*(1685) Resonance in Quasifree Compton Scattering on the Neutron

The first study of quasi-free Compton scattering on the neutron in the energy range of $E_{\gamma}=0.75 - 1.5$ GeV is presented. The data reveals a narrow peak at $W\sim 1.685$ GeV. This result, being considered in conjunction with the recent evidence for a narrow structure at $W\sim 1.68$GeV in the $\eta$ photoproduction on the neutron, suggests the existence of a new nucleon resonance with unusual properties: the mass $M\sim 1.685$GeV, the narrow width $\Gamma \leq 30$MeV, and the much stronger photoexcitation on the neutron than on the proton.Comment: Replaced with the version published in Phys. Rev.

COMPOSITION AND RELATIVE STABILITY OF ION-MOLECULAR FORMS THAT ARE REALIZED IN THE SYSTEM WATER – TETRAFLUOROBORIC ACID – HEXAMETHYLENETETRAMINE

The interaction features of tetrafluoroboric acid solutions with hexamethylenetetramine were studied by potentiometric method. The component composition of the system «water – tetrafluoroboric acid – hexamethylenetetramine» and complexation constants were calculaited. The estimation of tetrafluoroboric ions hydrolysis in presence of hexamethylenetetramine was made

THE KINETIC AND THERMODYNAMIC OF CHROMIUM COMPLEXES SORPTIONS’ WITH DIPHENYLCARBAZID AND CARMOAZINE USING ION-EXCHANGE RESINS CU-2-8 AND AV-17-8

There was organized estimation of the shaping sorption layer mechanism at extraction of coordination compounds (CC) chromium (III) diphenylcarmoazonate and chromium(III) carmoazonate (CAON-Cr(III)) by ion-exchanger resins CU-2-8 and AV-17-8 surface, by using dynamic and kinetic curves, that consider functions of the filling the granules ionexchange resins’ change at time, Biot number and sorption exchanging capacity value. The calculated thermodynamic parameters at CAON-Cr(III) extraction point to chemosorption sorption’s mechanism prevalence, that is accompanied by the reorientations CC effect for ion-exchangers resins’ surfaces

STOICHIOMETRY AND STRUCTURE OF TETRAFLUOROBORATE COMPLEXES OF Zn(II) WITH ISOMERIC PHENYLENDIAMINES

The tetrafluoroborate complexes of Zn (II) with o-, m- and p-phenylenediamines (FDA) have been synthesized. The investigation of the stoichiometry and the structure of synthesized compounds have been carried out by different physicochemical methods. In accordance with the results of element analysis and atomic absorption spectroscopy the compounds of general formula Zn(FDA)4(BF4)2have been obtained for m- and p-isomers independently of synthesis method. In the case of o-FDA at a synthesis without a solvent and components ratio 1:6 the complex Zn(o-FDA)2(BF4)2 has been synthesized. The lowering of ratio Zn:o-FDA to 1:4 and the ethanol use as a solvent resulted in two water molecules inclusioninto inner coordination sphere [Zn(o-FDA)2(H2O)2](BF4)2.The molar conductivity measurement of dimethylformamide solutions of synthesized compounds shown that complexes are the three-ionic electrolytes of general formula [Zn(FDA)4](BF4)2for m- and p-FDA and [Zn(о-FDA)2](BF4)2 and [Zn(о-FDA)2(H2O)2](BF4)2for o-FDA.The centers of the organic ligand coordination and the outer sphere character of the BF4-bonding have been found by IR spectroscopy. It was determined the nature of the organic ligand and synthesis method determine the stoichiometry and structure of complexes

ORGANIC SOLVENTS EFFECT ON THE AL, GA, IN EXTRACTION FROM AQUEOUS SOLUTIONS BY ORGANOSILICAS

The adsorption properties of organosilicas – dimethylchlorsilaneaerosil (DMCSA), previously hydrophilized by organic molecules of the polar nature (ethanol, acetone) to wards to aqueous solutions of Al, Ga, In were studied. It is shown that allocation of sorbate in from the aqueous phase in the solvating layer of hydrophilizer and then to surface DMCSA. The selectivity of an organized system “ DMCSA – polar organic solvent” in relation to the elements under study determined by the nature of the impregnated solvent, as well as differences in kinetic and acid-base parameters of the components of heterogeneous system in the process of sorption

INFLUENCE OF INORGANIC IONS NATURAL AND SEWAGE ON REACTION OF INTERACTION AND SORPTION EXTRACTION OF CHROMIUM(VI) IN THE FORM OF ITS COMPLEXES WITH 1,5-DIPHENYLKARBAZID AND CARMOAZINE

Individual influence of inorganic ions natural and sewages on reactions of a complex formation of chromium(VI) with organic reagents 1,5-diphenilkarbazide and carmoazine, and also process sorption extractions of complexes chromium(III) diphenylcarbazonate and chromium(III) diphenylcarmoazonate on ion-exchangers resins is investigated. Limiting concentration of the inorganic ions which are not influencing process of a complex formation and extraction of chromium(VI) are established

Influence of fertilizers on contents, fractional structure and balance of humus in sod-podsolic soil of the North

Researches on studying of efficiency of organic (40 and 80 t/ha of TNK) and mineral fertilizers (73 NPK, NPK and 1 NPK), and their combining use on a humic state, group and fractional structure, and balance of a humus of the sod-podsolic middle-cultivated sandy loam soil were conducted in field stationary experiment in a fodder crop rotation. As a result of the carried out researches it is established that the greatest positive balance of humus is received at use of organic fertilizers (0.41-1.80 t/ha on average per year), and also their joint use with mineral fertilizers (0.50.0.63; 1.96.2.10 t/ha); the greatest values are received at application of high dose of TNK and NPK (1.96-2.10 t/ha). Studying of group and fractional structure of a humus has shown that organic and mineral fertilizers, especially at their joint use promoted increase of content of the most valuable fraction of humic acids (GK-2) from 2.3 to 5.2% and to decrease in the most aggressive fraction of fulvic acids (FC-1a) from 3.5 to 2.7%. In general, fertilizers, especially in high doses, promoted increase of humus quality (from gumate-fulvatic type it has passed into fulvatic-gumate type). Ratio Cga: Cfa has made 1.30-1.33; in variants with mineral fertilizers and joint input of organic and mineral fertilizers (TNK in dose 40 t/ha + NPK) - 1.22-1.27; in variant without fertilizers - 0.98

КINETICS OF MASS TRANSFER IN HETEROGENEOUS SYSTEM «DIMETILHLORSILANAEROSIL – DIPOLAR SOLVENT – AQUEOUS SOLUTION OF EASILY HYDROLYZED CATIONS»

A comparative analysis of the mass transfer kinetics of easily hydrolyzed cations hydroxoforms the aqueous phase (LGK – Bi3 +, Sb3 +, Ti4 +, Al3 +, Ga3 +, In3 +, Fe3 + and Cr3+) was made on the dimethylchlorosilaneaerosile surface (DМCSA), impregnated by acetone, and its unmodified counterpart – aerosile A-300. It was shown, that the mass transfer kinetics of LGK in heterogeneous system «DMHSA – dipolar solvent – aqueous solution of LGK» is determined by formation of neutral sorption-active hydroxoforms by hydrolysis in aqueous solution according to the depth of the corresponding constants, and the extraction-sorption process for their transition to a thin layer impregnated dipolar solventhydrophilized and further consolidation on residual silanol groups occurs quite rapidly. The mass transfer kinetics accelerates for the A-300 as compared with DMHSA due to the implementation on the hydrated silica matrix A-300 of additional surface hydrolysis of LGK