Evaluation of Contemporary Environmental Condition of River Basins in Southern Pre-Caspian Areas of Azerbaijan

Southern Pre-Caspian areas of the Republic of Azerbaijan have favorable geographical position as well as natural and climatic condition for dwelling, development of settlements, and industrial activity. Most areas have fertile soils and attractive landscapes. These factors facilitate human distribution in the researched area and therefore, the area is highly populated. Population are engaged mainly in areas such as farming, namely production of tea, vine, cereals, vegetable, different fruits, including citrus plants, production of foods, and also cattle- and sheep-breeding. As a result, the coastal zone and rivers experience high anthropogenic influence. This article deals with the study of anthropogenic pollution of highly-settled river basins and valleys as well as evaluation of changes going by quality of river waters in southern Pre-Caspian areas of Azerbaijan

Adsorption of Polyethylene-Glycols by Nanosized Iron Oxides Particles in Iron Oxides/Polyethylene-Glycol/Water/ Dispersions

The successful application of dynamic light scattering and electron magnetic resonance spectroscopy technique to control the formation of nanosized particles of iron oxides  in iron oxides containing aqueous polyethylene-glycol  dispersions is shown. The formation of  the pegylated  iron oxides particles with  superparamagnetic properties in this system is established.Â

Interband electron Raman scattering in a quantum wire in a transverse magnetic field

Electron Raman scattering (ERS) is investigated in a parabolic semiconductor quantum wire in a transverse magnetic field neglecting by phonon-assisted transitions. The ERS cross-section is calculated as a function of a frequency shift and magnetic field. The process involves an interband electronic transition and an intraband transition between quantized subbands. We analyze the differential cross-section for different scattering configurations. We study selection rules for the processes. Some singularities in the Raman spectra are found and interpreted. The scattering spectrum shows density-of-states peaks and interband matrix elements maximums and a strong resonance when scattered frequency equals to the "hybrid" frequency or confinement frequency depending on the light polarization. Numerical results are presented for a GaAs/AlGaAs quantum wire.Comment: 8 pages, 5 figure

Influence of dispersing additive on asphaltenes aggregation in model system

The work is devoted to investigation of the dispersing additive influence on asphaltenes aggregation in the asphaltenes-toluene-heptane model system by photon correlation spectroscopy method. The experimental relationship between the onset point of asphaltenes and their concentration in toluene has been obtained. The influence of model system composition on asphaltenes aggregation has been researched. The estimation of aggregative and sedimentation stability of asphaltenes in model system and system with addition of dispersing additive has been given

Применение экстракорпоральных систем протезирования функций печени при острой декомпенсированной печеночной недостаточности

The aim of the study: to evaluate the efficacy of extracorporeal liver support systems in patients with acute liver failure of various etiologies.Material and methods. The study included 117 patients with acute liver failure of various etiologies. The main group consisted of 71 patients who received complex intensive therapy, including MARS-therapy and hemodiafiltration. The comparison group included 46 patients who received albumin dialysis (24 patients) and hemodiafiltration (22 patients) alone. The mean age of the patients was 34±5.6 years, the majority (56.4%) were men. Dynamic assessment of patients' severity was performed using Sequential Organ Failure Assessment (SOFA) and Model for End-Stage Liver Disease (MELD) scales.Results. A more significant reduction of SOFA and MELD scores was noted as early as by day 10 of intensive therapy in the main group with sequential use of extracorporeal liver detoxification methods — to 2.7±0.2 vs. 8.3±0.5 points (P=0.021) on SOFA and to 16.7±0.4 vs. 23.4±1.4 points (P=0.023) MELD scales. The use of a comprehensive approach to extracorporeal detoxification in acute decompensated liver failure increased the regression rate of multiple organ failure from 51.2 to 74.6% and reduced mortality from 47.8 to 25.4% (χ2=6.266; df=1; P=0.013). At the same time, the cumulative proportion of survivors depending on the type of complication within 30 days was 88.4% in the main group and 69.0% in the comparison group (χ2=4.164; df=1; P=0.042).Conclusion. A comprehensive approach to extracorporeal detoxification is highly effective, providing a more significant reduction of SOFA and MELD scores, increasing the proportion of regression of multiple organ dysfunction and reducing mortality.Цель исследования: выявить эффективность систем экстракорпоральной поддержки печени у пациентов с острой печеночной недостаточностью различного генеза.Материал и методы. В исследование включили 117 пациентов с острой печеночной недостаточностью различного генеза. Основную группу составили 71 пациент, которые получали комплексную интенсивную терапию, включая применение MARS-терапии и гемодиафильтрацию. В группу сравнения включили 46 пациентов, которым применены изолированно альбуминовый диализ — 24 пациента и гемодиафильтрация — 22 пациента. Средний возраст пациентов составил 34±5,6 лет, большинство (56,4%) были мужчины. Динамическую оценку тяжести состояния пациентов проводили по оценочным шкалам Sequential Organ Failure Assessment (SOFA) и Model for End-Stage Liver Disease (MELD).Результаты. Более существенное снижение показателей по шкалам SOFA и MELD отмечено уже к 10 суткам интенсивной терапии в основной группе при последовательном использовании методов экстракорпоральной детоксикации печени по шкале SOFA — до 2,7±0,2 против 8,3±0,5 баллов (p=0,021) и MELD — до 16,7±0,4 против 23,4±1,4 баллов (p=0,023). Применение комплексного подхода к экстракорпоральной детоксикации при острой декомпенсированной печеночной недостаточности позволило увеличить долю регресса полиорганной недостаточности с 51,2 до 74,6%, сократить летальность с 47,8 до 25,4% (χ2=6,266; df=1; p=0,013). При этом кумулятивная доля выживших в зависимости от типа осложнения в сроки до 30 суток составила при 88,4% — в основной группе и 69,0% — в группе сравнения (χ2=4,164; df=1; p=0,042).Заключение. Комплексный подход к экстракорпоральной детоксикации имеет высокую эффективность, обеспечивая более существенное снижение баллов по шкалам SOFA и MELD, позволяет увеличить долю регресса полиорганной дисфункции и сократить летальность