Многоэлементный стандартный образец для методов с индуктивно связанной плазмой: разработка и испытания

Determination of the calibration dependence of spectrometers’ output signal on the content of the measured elements is of great importance for the metrological assurance of the high-precision inductively coupled plasma (ICP) massspectrometry and optical emission spectrometry methods. This paper presents the results of a study on establishing the certified values of reference material of composition of multi-element solution of metals intended for inductively coupled plasma methods (ICP-CRM solution Multi 1). The reference material (RM) is a solution with certified values of the mass fraction of metals: barium, cadmium, cobalt, lithium, lead, and zinc. The solution was packed in high-density polyethylene bottles with the capacity of 4, 8, 15, 30, 60 and 125 cm3 . The certified value of the mass fraction of metals in the solution was established by the calculation and experimental procedure and confirmed by the GET 217-2018 State Primary Standard of Unit of Mass Fraction and Unit of Mass (Molar) Concentration of Inorganic Components in Aqueous Solutions Based on Gravimetric and Spectral Methods. The permissible certified values of the mass fraction of metals in the developed ICP-CRM are shown to range from 900 mg/kg to 1100 mg/kg. The authors have embarked on the study of the reference material by testing RMs for long-term stability and determination of the RMs’ expiration date. It is assumed that the expanded uncertainty of measurements of the certified value of the mass fraction of metals in the solution of the multi-element ICP-CRM solution Multi 1 will not exceed 0.5 %. The ICP-CRM solution Multi 1 can be used for ensuring the metrological traceability of measurements in inorganic analysis using ICP-MS and ICP-OES to the GET 217-2018. The developed solution will also allow one of the main advantages of these methods to be applied in routine analysis, namely the ability to quickly and simultaneously measure several elements in samples.Для метрологического обеспечения высокоточных методов масс-спектрометрии и оптико-эмиссионной спектроскопии с индуктивно связанной плазмой большое значение играет процесс установления градуировочной зависимости выходного сигнала спектрометров от содержания измеряемых элементов. В настоящей статье авторами представлены результаты работ по установлению аттестованных значений стандартного образца состава мультиэлементного раствора металлов, предназначенных для методов с индуктивно связанной плазмой (ИСП-СО Multi 1). Стандартный образец (СО) представляет собой раствор с аттестованными значениями массовой доли металлов: бария, кадмия, кобальта, лития, свинца и цинка, упакованный во флаконы из полиэтилена высокого давления вместимостью 4, 8, 15, 30, 60 или 125 см3 . Установление аттестованного значения массовой доли металлов в растворе выполнено по расчетно-экспериментальной процедуре приготовления; данное значение подтверждено на Государственном первичном эталоне единиц массовой доли и массовой (молярной) концентрации неорганических компонентов в водных растворах на основе гравиметрического и спектральных методов ГЭТ 217-2018. Интервал допускаемых аттестованных значений массовой доли металлов в ИСП-СО составляет (900–1100) мг/кг. Для исследования материала СО авторами начата работа по испытанию СО на долговременную стабильность и установлению срока годности СО. Предполагается, что расширенная неопределенность измерений аттестованного значения массовой доли металлов в растворе многоэлементного ИСП-СО Multi 1 не будет превышать 0,5 %. ИСП-СО Multi 1 позволит обеспечить метрологическую прослеживаемость результатов измерений в неорганическом анализе методами ИСП-МС и ИСП-ОЭС от Государственного первичного эталона ГЭТ 217-2018 и позволит применять в рутинном анализе одно из основных преимуществ этих методов – возможность быстро и одновременно измерить несколько элементов в образцах

Diversity of Mobile Genetic Elements in the Mitogenomes of Closely Related Fusarium culmorum and F. graminearum sensu stricto Strains and Its Implication for Diagnostic Purposes

Much of the mitogenome variation observed in fungal lineages seems driven by mobile genetic elements (MGEs), which have invaded their genomes throughout evolution. The variation in the distribution and nucleotide diversity of these elements appears to be the main distinction between different fungal taxa, making them promising candidates for diagnostic purposes. Fungi of the genus Fusarium display a high variation in MGE content, from MGE-poor (Fusarium oxysporum and Fusarium fujikuroi species complex) to MGE-rich mitogenomes found in the important cereal pathogens F. culmorum and F. graminearum sensu stricto. In this study, we investigated the MGE variation in these latter two species by mitogenome analysis of geographically diverse strains. In addition, a smaller set of F. cerealis and F. pseudograminearum strains was included for comparison. Forty-seven introns harboring from 0 to 3 endonucleases (HEGs) were identified in the standard set of mitochondrial protein-coding genes. Most of them belonged to the group I intron family and harbored either LAGLIDADG or GIY-YIG HEGs. Among a total of 53 HEGs, 27 were shared by all fungal strains. Most of the optional HEGs were irregularly distributed among fungal strains/species indicating ancestral mosaicism in MGEs. However, among optional MGEs, one exhibited species-specific conservation in F. culmorum. While in F. graminearum s.s. MGE patterns in cox3 and in the intergenic spacer between cox2 and nad4L may facilitate the identification of this species. Thus, our results demonstrate distinctive traits of mitogenomes for diagnostic purposes of Fusaria

Diversity of mobile genetic elements in the mitogenome of closely related Fusarium culmorum and F. graminearum sensu stricto strains ans its implication for diagnostic purposes

Much of the mitogenome variation observed in fungal lineages seems driven by mobile genetic elements (MGEs), which have invaded their genomes throughout evolution. The variation in the distribution and nucleotide diversity of these elements appears to be the main distinction between different fungal taxa, making them promising candidates for diagnostic purposes. Fungi of the genus Fusarium display a high variation in MGE content, from MGE-poor (F. oxysporum and Fusarium fujikuroi species complex) to MGE-rich mitogenomes found in the important cereal pathogens F. culmorum and F. graminearum sensu stricto. In this study, we investigated the MGE variation in these latter two species by mitogenome analysis of geographically diverse strains. In addition, a smaller set of F. cerealis and F. pseudograminearum strains was included for comparison. Forty-seven introns harboring from 0 to 3 endonucleases (HEGs) were identified in the standard set of mitochondrial protein-coding genes. Most of them belonged to the group I intron family and harbored either LAGLIDADG or GIY-YIG HEGs. Among a total of 53 HEGs, 27 were shared by all fungal strains. Most of the optional HEGs were irregularly distributed among fungal strains/species indicating ancestral mosaicism in MGEs. However, among optional MGEs, one exhibited species-specific conservation in F. culmorum. While in F. graminearum s.s. MGE patterns in cox3 and in the intergenic spacer between cox2 and nad4L may facilitate the identification of this species. Thus, our results demonstrate distinctive traits of mitogenomes for diagnostic purposes of Fusaria.Fil: Kulik, Tomasz. Department Of Botany And Nature Protection, University; PoloniaFil: Brankovics, Balazs. Wageningen Plant Research, Wageningen University; Países BajosFil: Van Diepeningen, Anne D.. Waneningen Plant Research; Países BajosFil: Bilska, Katarzyna. Department Of Botany And Nature Protection, University; PoloniaFil: Zelechowski, Maciej. Department Of Botany And Nature Protection, University; PoloniaFil: Myszczyński, Kamil. Department Of Botany And Nature Protection, University; PoloniaFil: Molcan, Tomasz. Faculty Of Biology And Biotechnology, University; PoloniaFil: Stakheev. Alexander. Institute Of Bioorganic Chemistry (ras); RusiaFil: Stenglein, Sebastian Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnolológico Mar del Plata. Instituto de Investigaciones en Biodiversidad y Biotecnología. Laboratorio de Biología Funcional y Biotecnología; ArgentinaFil: Beyer, Marco. Luxembourg Institute Of Science And Technology; LuxemburgoFil: Pasquali, Matias. Faculty Of Agricultural And Food Sciences; ItaliaFil: Sawicki, Jakub. Department Of Botany And Nature Protection, University; PoloniaFil: Baturo Cieśniewska, Anna. Baturo-cieśniewska; Poloni

Участие ФГУП «ВНИИФТРИ» в международных сличениях в области физико-химических измерений

This paper considers the participation of FSUE «VNIIFTRI» in international comparisons: in the field of physicalchemical measurements, particularly in pH-metry and ionometry (pX); in the sphere of measuring inorganic components in various matrices. Measurement and calibration capabilities are presented – CMC lines in the BIPM database.В статье рассмотрено участие ФГУП «ВНИИФТРИ» в международных сличениях в области физико-химических измерений (рН-метрия и ионометрия (рХ)), а также в области измерений неорганических компонентов в различных матрицах, представлены измерительные и калибровочные возможности – СМС-строки в базе данных МБМВ

Method of calculating a layer gasifier with the determination of chemical products

The paper proposes a method for calculating the layered gas generator, which allows calculating not only the yield and composition of the generator gas in the gasification of solid fuels, but the yield and composition of chemical products. The calculation is made based on the proposed method for the coal gasification of the technological grade "G" of OAO «Severny Kuzbass».В работе предложена методика расчета слоевого газогенератора, позволяющая рассчитывать не только выход и состав генераторного газа при газификации твёрдых топлив, но выход и состав химических продуктов. Приведён расчёт по предложенной методике процесса газификации каменного угля технологической марки "Г" ОАО «Северный Кузбасс»

Generation of subnanometric platinum with high stability during transformation of a 2D zeolite into 3D

[EN] Single metal atoms and metal clusters have attracted much attention thanks to their advantageous capabilities as heterogeneous catalysts. However, the generation of stable single atoms and clusters on a solid support is still challenging. Herein, we report a new strategy for the generation of single Pt atoms and Pt clusters with exceptionally high thermal stability, formed within purely siliceous MCM-22 during the growth of a two-dimensional zeolite into three dimensions. These subnanometric Pt species are stabilized by MCM-22, even after treatment in air up to 540 degrees C. Furthermore, these stable Pt species confined within internal framework cavities show size-selective catalysis for the hydrogenation of alkenes. High-temperature oxidation-reduction treatments result in the growth of encapsulated Pt species to small nanoparticles in the approximate size range of 1 to 2 nm. The stability and catalytic activity of encapsulated Pt species is also reflected in the dehydrogenation of propane to propylene.This work was funded by the Spanish Government (Consolider Ingenio 2010-MULTICAT (CSD2009-00050) and MAT2014-52085-C2-1-P) and by the Generalitat Valenciana (Prometeo). The Severo Ochoa Program (SEV-2012-0267) is gratefully acknowledged. L.L. thanks ITQ for a contract. The authors also thank the Microscopy Service of UPV for the TEM and STEM measurements. The HAADF-HRSTEM works were conducted in the Laboratorio de Microscopias Avanzadas (LMA) at the Instituto de Nanociencia de Aragon (INA)-Universidad de Zaragoza (Spain), a Spanish ICTS National Facility. Some of the research leading to these results has received funding from the European Union Seventh Framework Program under Grant Agreement 312483-ESTEEM2 (Integrated Infrastructure Initiative-I3). 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