Analysis of the reserves-to-production ratio for various stratigraphic complexes of Western Siberia

The distribution of cumulative production and current oil reserves of all categories, differentiated by administrative subjects located within the West Siberian oil and gas province, shows significant heterogeneity in the distribution of these indicators across stratigraphic horizons. For each horizon, an integration of the reserves-to-production ratio criterion (A category) and water cut is carried out. It is shown that the main share of both cumulative production and current recoverable reserves that ensure this production falls on the Neocomian complex, which has critically high water cut and low flow rates

USING EMULSIONS BASED ON ANIMAL BLOOD FOR ENRICHMENT MEAT PRODUCTS WITH ORGANIC IRON

Iron lacking into the human body causes a violation of vital functions and leads to various diseases. Presence into animal blood significant quantities an organic iron determines the prospects its use in preventive food for people with iron deficiency anemia diseases. Serious restriction of using blood into production various meat products is a characteristic red color associated with presence in hemoglobin the protein the iron-containing component - heme. Authors proposes using an emulsions based on food blood into meat products, which provides a wide range of products with a pronounced functional orientation and excellent organoleptic and physicochemical characteristics. Experiments were carried out in the research laboratories of the department of technology of production and processing of agricultural products, as well as in the accredited educational and scientific testing laboratory of the Stavropol State Agrarian University. Research objects were pig blood stabilized by sodium pyrophosphate, cattle blood, and sausages. Quality of finished products was assessed by physicochemical, organoleptic and microbiological indicators according to generally accepted methods. Proportion of blood into emulsion ranged from 10 to 45%. Careful homogenization ensured stability and durability of the resulting emulsion. Emulsifying ability of the developed emulsion is 100% by temperature of 0-4 °C and stable for 48 hours. This technological solution will make it possible to enrich finished product with heme iron, which is important for consumers with a low level of hemoglobin in the blood and creates conditions for production the meat products with antianemic effect. Keywords: antianemic products, functional nutrition, amino acid composition, protein digestibility

Pulmonary tuberculosis in clinical practice

Pulmonary tuberculosis has a lot of clinical manifestations, and it complicates the diagnosis of tuberculosis in the general clinical practice. We studied the clinical manifestations of tuberculosis detected in the pulmonary department and compared them with the significancy of diagnostic methods. Material and methods. People with a verified diagnosis of lung tuberculosis (n=109) were examined using the GeneXpert MTB/RIF method if Ziehl Nielsen bacterioscopy has negative results or if there was no effect of treatment for two weeks. Results. All patients had complaints of both intoxication and bronchitis as with pneumonia on admission. Infiltrative tuberculosis (57,1 %; n=68), disseminated tuberculosis (16,8 %; n=20) were most often diagnosed. We looked for correlations between dyspnea and the prevalence of the process (p=0,24), dyspnea with temperature (p=0,24), the presence of pain in the chest (p=0,405), the results of immunodiagnostics and sputum examination (p=0,133). We found out that there are no such correlations in tuberculosis. The term for diagnosing tuberculosis was 7,97±3,9 days in the presence of cough with sputum and 9,04±4,3 days in the case of dry cough. The term for diagnosing tuberculosis was 12,31±4,9 days in patients without cough. Mycobacterium tuberculosis was detected using GeneXpert MTB/RIF molecular genetic methods with nonproductive cough in 84,5 % (60 people out of 71), while in the first days of hospitalization in 46,6 % of patients (28 people out of 60, p <0,001). Conclusion. It was found that the period of hospitalization is little related to the characteristics of patients and depends on organizational measures to identify mycobacterium tuberculosis. It is recommended to immediately apply the GeneXpert MTB / RIF method to patients with mild tuberculosis

The Dichotomy of Mn–H Bond Cleavage and Kinetic Hydricity of Tricarbonyl Manganese Hydride Complexes

Acid-base characteristics (acidity, pKa, and hydricity, ΔG°H− or kH−) of metal hydride complexes could be a helpful value for forecasting their activity in various catalytic reactions. Polarity of the M–H bond may change radically at the stage of formation of a non-covalent adduct with an acidic/basic partner. This stage is responsible for subsequent hydrogen ion (hydride or proton) transfer. Here, the reaction of tricarbonyl manganese hydrides mer,trans–[L2Mn(CO)3H] (1; L = P(OPh)3, 2; L = PPh3) and fac–[(L–L′)Mn(CO)3H] (3, L–L′ = Ph2PCH2PPh2 (dppm); 4, L–L′ = Ph2PCH2–NHC) with organic bases and Lewis acid (B(C6F5)3) was explored by spectroscopic (IR, NMR) methods to find the conditions for the Mn–H bond repolarization. Complex 1, bearing phosphite ligands, features acidic properties (pKa 21.3) but can serve also as a hydride donor (ΔG≠298K = 19.8 kcal/mol). Complex 3 with pronounced hydride character can be deprotonated with KHMDS at the CH2–bridge position in THF and at the Mn–H position in MeCN. The kinetic hydricity of manganese complexes 1–4 increases in the order mer,trans–[(P(OPh)3)2Mn(CO)3H] (1) mer,trans–[(PPh3)2Mn(CO)3H] (2) ≈ fac–[(dppm)Mn(CO)3H] (3) fac–[(Ph2PCH2NHC)Mn(CO)3H] (4), corresponding to the gain of the phosphorus ligand electron-donor properties

Influence of triphosphine ligand coordination geometry in Mn(I) hydride complexes [(P∩P∩P)(CO)₂MnH] on their kinetic hydricity

International audienceOctahedral Mn(I) complexes bearing tridentate donor ligands [(L∩L’∩L’’)(CO)2MnX] have recently emerged as major players in catalytic (de)hydrogenation processes. While most of these systems are still based on structurally rigid pincer scaffolds imposing a meridional coordination mode, for some more flexible tridentate ligands a facial arrangement of donor moieties becomes possible. Accordingly, the geometry of the corresponding Mn(I) hydrides [(L∩L’∩L’’)(CO)2MnH] directly involved in the catalytic processes, namely the nature of the donor extremity located in the trans-position of the hydride (CO and L for mer- and fac-configuration, respectively) may influence their hydride transfer ability. Herein, low-temperature IR and NMR spectroscopy studies of two model Mn(I) complexes mer-[(L1)(CO)2MnH] and fac-[(L2)(CO)2MnH] bearing similar triphosphine ligands (L1 = PhP(CH2CH2PPh2)2; L2 = MeC(CH2PPh2)3) in the presence of B(C6F5)3 as H− abstractor revealed for the first time a higher kinetic hydricity of the tripodal system. Even for the pincer complex, hydride transfer proceeds from the non-covalent adduct fac-[(L1)(CO)2MnH]∙∙∙B(C6F5)3 with facial geometry arising from the mer-to-fac isomerization of the initial mer-[(L1)(CO)2MnH]. The higher reactivity of the fac-hydride derivatives was found to be consistent with catalytic performance of the corresponding Mn(I) bromide complexes in the benchmark ester hydrosilylation