РІВЕНЬ ОРГАНІЧНИХ ТОКСИЧНИХ СПОЛУК У ВОДНИХ ЕКОСИСТЕМАХ

Monitoring of water samples taken from some territories was carried out. So that water samples were taken from 7 different regions of the Caspian Sea and analyzed for mainly toxic organic compounds – PAHs, phenol, and its derivatives. The analyses were carried out using extremely sensitive devices such as GC-MSD gas chromatograph 6890N with a highly efficient mass-selective detector-Agilent 5975. It was determined that the investigated toxic organic compounds in the wastewaters of the Caspian Sea coast exceed the permissible limit. This fact was formed against the background of serious negative impacts on the flora and fauna of the Caspian Sea with the discharge of industrial wastewater. In water samples, 15 PAHs and 11 phenolic compounds were analyzed.Проведено моніторинг проб води, відібраних із 7 різних регіонів Каспійського моря, та проаналізовано на наявність токсичних органічних сполук – ПАУ, фенолу та його похідних. Аналізи проводилися з використанням надзвичайно чутливих пристроїв, таких як газовий хроматограф GC-MSD 6890N з високоефективним масселективним детектором Agilent 5975. Було встановлено, що досліджувані токсичні органічні сполуки у стічних водах узбережжя Каспійського моря перевищують гранично допустимі норми. Цей факт сформувався на тлі серйозних негативних впливів на флору та фауну Каспійського моря внаслідок скидання промислових стічних вод. У пробах води було проаналізовано 15 ПАВ та 11 фенольних сполук

РІВЕНЬ ОРГАНІЧНИХ ТОКСИЧНИХ СПОЛУК У ВОДНИХ ЕКОСИСТЕМАХ

Проведено моніторинг проб води, відібраних із 7 різних регіонів Каспійського моря, та проаналізовано на наявність токсичних органічних сполук – ПАУ, фенолу та його похідних. Аналізи проводилися з використанням надзвичайно чутливих пристроїв, таких як газовий хроматограф GC-MSD 6890N з високоефективним масселективним детектором Agilent 5975. Було встановлено, що досліджувані токсичні органічні сполуки у стічних водах узбережжя Каспійського моря перевищують гранично допустимі норми. Цей факт сформувався на тлі серйозних негативних впливів на флору та фауну Каспійського моря внаслідок скидання промислових стічних вод. У пробах води було проаналізовано 15 ПАВ та 11 фенольних сполук

Competing magnetic and structural states in multiferroic YMn2{_2}O5{_5} at high pressure

The magnetic, structural, and vibrational properties of YMn${_2}$O${_5}$ multiferroic have been studied bymeans of neutron, x-ray powder diffraction, and Raman spectroscopy at pressures up to 6 and 30 GPa,respectively. Application of high pressure,P >1 GPa, leads to a gradual suppression of the commensurate andincommensurate antiferromagnetic (AFM) phaseswith a propagation vector q = (1/2,0,q${_z}$∼1/4) and appearanceof the commensurate AFM phase with q = (1/2,0,1/2). This observation is sharply contrasting to general trendtowards stabilization of commensurate AFM phase with q = (1/2,0,1/4) found in other RMn${_2}$O${_5}$ compoundsupon lattice compression. At P ∼ 16 GPa a structural phase transformation accompanied by anomalies in latticecompression and pressure behavior of vibrational modeswas observed. The comparative analysis of high-pressureand R-cation radius variation effects clarified a role of particular magnetic interactions in the formation of themagnetic states of RMn${_2}$O${_5}$ compounds

Structural, magnetic and vibrational properties of multiferroic GaFeO3GaFeO_{3} at high pressure

The crystal, magnetic structure and vibrational spectra of multiferroic GaFeO$_3$ have been studied by means of neutron, X-ray powder diffraction and Raman spectroscopy at pressures up to 6.2 and 42 GPa, respectively. A presence of Fe/Ga antisite disorder leads to a formation of the ferrimagnetic ground state with the Néel temperature T$_N$ = 292 K at ambient pressure. Upon compression, the magnetic ground state symmetry remains the same and the Néel temperature increases with a pressure coefficient (1/T$_N$)(dT$_N$/dP) = 0.011(1) GPa$^{−1}$. Application of high pressure above 21 GPa leads to a gradual structural phase transition from the polar orthorhombic Pc2$_1$n phase to nonpolar orthorhombic Pbnm phase. It is accompanied by anomalies in the pressure behaviour of several Raman modes. Pressure dependencies of lattice parameters and Raman modes frequencies in the observed structural phases were obtained

An intermediate antipolar phase in NaNbO3NaNbO_{3} under compression

The crystal structure and vibration spectra of sodium niobate NaNbO$_3$ have been studied by means of neutron diffraction, X-ray diffraction and Raman spectroscopy at high pressures. An isostructural phase transformation from the initial antiferroelectric phase to an intermediate antiferroelectric phase HP-I have been observed under 2 GPa. This transformation is caused by complex reorientations of NbO$_6$ octahedra. Subsequent structural phase transition from the phase HP-I to an orthorhombic phase HP-III have been detected at pressures above 10 GPa. This transition leads to suppression of an antiferroelectric state of NaNbO$_3$. The observed phase transitions are accompanied by anomalies in lattice parameters compression

Function and Emotion in Everyday Life With Type 1 Diabetes (FEEL-T1D): Protocol for a Fully Remote Intensive Longitudinal Study

BackgroundAlthough short-term blood glucose levels and variability are thought to underlie diminished function and emotional well-being in people with type 1 diabetes (T1D), these relationships are poorly understood. The Function and Emotion in Everyday Life with T1D (FEEL-T1D) study focuses on investigating these short-term dynamic relationships among blood glucose levels, functional ability, and emotional well-being in adults with T1D. ObjectiveThe aim of this study is to present the FEEL-T1D study design, methods, and study progress to date, including adaptations necessitated by the COVID-19 pandemic to implement the study fully remotely. MethodsThe FEEL-T1D study will recruit 200 adults with T1D in the age range of 18-75 years. Data collection includes a comprehensive survey battery, along with 14 days of intensive longitudinal data using blinded continuous glucose monitoring, ecological momentary assessments, ambulatory cognitive tasks, and accelerometers. All study procedures are conducted remotely by mailing the study equipment and by using videoconferencing for study visits. ResultsThe study received institutional review board approval in January 2019 and was funded in April 2019. Data collection began in June 2020 and is projected to end in December 2021. As of June 2021, after 12 months of recruitment, 124 participants have enrolled in the FEEL-T1D study. Approximately 87.6% (7082/8087) of ecological momentary assessment surveys have been completed with minimal missing data, and 82.0% (82/100) of the participants provided concurrent continuous glucose monitoring data, ecological momentary assessment data, and accelerometer data for at least 10 of the 14 days of data collection. ConclusionsThus far, our reconfiguration of the FEEL-T1D protocol to be implemented remotely during the COVID-19 pandemic has been a success. The FEEL-T1D study will elucidate the dynamic relationships among blood glucose levels, emotional well-being, cognitive function, and participation in daily activities. In doing so, it will pave the way for innovative just-in-time interventions and produce actionable insights to facilitate tailoring of diabetes treatments to optimize the function and well-being of individuals with T1D. International Registered Report Identifier (IRRID)DERR1-10.2196/3090