Geochemical groundwater peculiarities of Paleogene sediments in S-E Western Siberia artesian basin

The geochemical peculiarities of groundwater in Paleogene deposits in southeastern part of Western Siberia artesian basin are considered in the paper. Landscape, climate, geostructural and hydrogeological conditions define the water composition and quality peculiarities in this region. It has been established that ion-saline composition, mineralization and water quality changes arre governed by the horizontal zonal distribution. Groundwater of taiga landscapes generally is in equilibrium with kaolinite and quartz, mainly involving Ca- and Mg-montmorillonite, illite, carbonate minerals, sometimes barite. Groundwater in woodland grass and grassland, together with previously mentioned minerals, is usually in equilibrium with barite, colestine, and particularly, fluorite and gypsum. As a result, all relevant elements are removed from the groundwater and their accumulation level is restricted

The incidence of Arnold–Chiari malformation in neurological practice

Arnold-Chiari malformation (ACM) is a group of congenital hindbrain malformations affecting the structural relationships between the cerebellum, brain stem, top cervical spinal cord, and bones of the skull base. In clinical practice, ACM types 0 and 1 are more common and types 2, 3, and 4 belong to rare severe (often fatal) congenital malformations.Objective: to study gender differences in the incidence of ACM types 0 and 1 in outpatient neurological practice.Patients and methods. A total 2039 case records of outpatients who had visited a neurologist of the Krasnoyarsk University clinic in 2008–2014 were analyzed. Neurological and neuroradiological (1.5 Tesla brain magnetic resonance imaging, phase-contrast spinal cerebral fluid flow imaging) diagnostic techniques were used. 3.4% (70/2039) of cases were randomized according to the criteria of inclusion and exception. An entire sample included 70 ACM patients (median age, 25 [17; 34] years) (30 (42.8–7.1%) men and 40 (57.2–7.1%) women).Results. There was an increase in the incidence of ACM type 1 in the women than in the men. Conclusion. It is necessary to develop a new strategy for the prophylactic medical examination of patients with ACM to improve primary and specialized outpatient health care

Гелий в подземных водах Республики Алтай

This study of groundwaters of the Altai Republic is relevant due to the need to identify earthquake precursors in seismically active zones of the study area. Chemical composition of groundwater is widely known as an indicator of seismic processes, which changes in future earthquake focal zones. In this regard, studying helium contents in groundwater is of particular importance – anomalous concentrations of helium are typical of fault zones, and helium concentration variations in time can be referred to as earthquake precursors.Our study was focused on the distribution of helium in groundwaters of the Altai Republic and aimed to determine and justify positioning of permanent monitoring sites for investigation of earthquake precursors.During the field study, groundwater samples were taken from wells and springs located within the area covered by the established state monitoring network (GONS). Groundwater aquifers and water-bearing zones from Quaternary to Proterozoic ages were sampled.Analysis of the groundwater samples shows spatial variations of helium concentration in the study area. Water samples from fault zones have increased concentrations of helium. The concentration of helium is high in the groundwater from the Chuya artesian basin, i.e. near the epicentral zone of the M 7.5 Altai (Chuya) earthquake of September 27, 2003.Актуальность исследований определяется необходимостью обоснования предвестников землетрясений в сейсмоактивных районах Республики Алтай. Широко известно, что химический состав подземных вод является индикатором сейсмических процессов, отмечены его изменения в зонах очагов предстоящих землетрясений. Изучение содержаний гелия в подземных водах в этой связи имеет особое значение, так как аномальные величины этого газа являются показателем вод в зонах разрывных нарушений, а его временные вариации могут быть использованы в качестве предвестника землетрясений.Цель работы – изучить распределение гелия в подземных водах Республики Алтай в связи с поисками и обоснованием постоянно действующих пунктов наблюдений, являющихся базой для поиска предвестников сильных сейсмических событий.В основу работы положены результаты опробования подземных вод на территории Республики Алтай. Пунктами опробования являлись скважины и родники действующей в республике государственной наблюдательной сети. При полевых исследованиях опробованы разнообразные водоносные комплексы и водоносные зоны от четвертичного до протерозойского возраста.По материалам проведенных исследований установлены пространственные изменения содержания гелия в подземных водах на территории Республики Алтай; предполагается приуроченность повышенных значений концентраций гелия к разломным зонам. Выявлено высокое содержание гелия в подземных водах Чуйского артезианского бассейна, вблизи эпицентральной зоны Алтайского (Чуйского) землетрясения (27.09.2003 г., магнитуда 7.5)

Anaerobic endodontic microflora in dynamics of chronic apical periodontitis treatment

26 patients with chronic apical periodontitis had clinical and laboratory examinations with a following treatment. The anaerobic microflora of 40 dental root canals were examined before and after a week treatment to assess the efficacy of the antiseptic paste «Metapex». The sampling and PCR study of the root canal contents indicate the insufficient efficacy of a single paste application. Thus, metronidazole-containing compositions effectively suppressing the anaerobic microflora of root canals are more preferable in a dental practice

Helium in groundwaters of the Altai Republic

This study of groundwaters of the Altai Republic is relevant due to the need to identify earthquake precursors in seismically active zones of the study area. Chemical composition of groundwater is widely known as an indicator of seismic processes, which changes in future earthquake focal zones. In this regard, studying helium contents in groundwater is of particular importance – anomalous concentrations of helium are typical of fault zones, and helium concentration variations in time can be referred to as earthquake precursors.Our study was focused on the distribution of helium in groundwaters of the Altai Republic and aimed to determine and justify positioning of permanent monitoring sites for investigation of earthquake precursors.During the field study, groundwater samples were taken from wells and springs located within the area covered by the established state monitoring network (GONS). Groundwater aquifers and water-bearing zones from Quaternary to Proterozoic ages were sampled.Analysis of the groundwater samples shows spatial variations of helium concentration in the study area. Water samples from fault zones have increased concentrations of helium. The concentration of helium is high in the groundwater from the Chuya artesian basin, i.e. near the epicentral zone of the M 7.5 Altai (Chuya) earthquake of September 27, 2003