scholarly journals Y3Ru2−x—A Representative of a Composite Modulated Family of Intermetallics

Crystals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 189 ◽  
Author(s):  
Sven Lidin ◽  
Laura Folkers
Keyword(s):  
Single Crystal ◽  
High Quality ◽  
Space Group ◽  
Q Vector

The compound Y3Ru2−x was synthesized from the elements and the structure was solved from single crystal synchrotron data. The high quality of the data allowed the determination of the incommensurate ordering of the compound, previously reported as disordered, with respect to the second subsystem. The compound crystallizes in the super space group X-3(00γ)0 with the q-vector axial along c*, q = 00, λ = 0.4276(7) and the centering vectors (1/3 2/3 0 1/3), (2/3 1/3 0 2/3).

scholarly journals Development of new total RNA isolation method for tissues with rich phenolic compounds

2020 ◽  
Vol 45 (4) ◽  
pp. 343-350
Author(s):  
Zafer Seçgin ◽  
Gökhan Gökdemir ◽  
Elif Seda Atabay ◽  
Aslıhan Kurt Kızıldoğan ◽  
Musa Kavas
Keyword(s):  
Phenolic Compounds ◽  
Rna Sequencing ◽  
Rna Isolation ◽  
Wall Structure ◽  
Isolation Method ◽  
High Quality ◽  
Ctab Method ◽  
Total Rna Isolation

AbstractBackgroundRNAs to be used in transcriptome analysis must be of high quality and pure in order to ensure maximum representation of the expressed genes. RNA isolation is difficult in hazelnut tissues containing large amounts of secondary metabolite, phenolic compounds and the cell wall structure. Commonly used protocols for RNA isolation are those that require a lot of labor and time and also do not allow sufficient RNA isolation when applied to tissues rich in phenolic compounds. This study was aimed to develop an efficient method for isolation of total RNAs from bud of hazelnut to be used in RNA sequencing.Materials and methodsAn optimized new method was successfully applied on three different hazelnuts genotypes (Çakıldak, Palaz, Tombul) and about 25 times higher amount of total RNAs per mg fresh tissues were obtained compared to classical CTAB method. Different methods have been tried for the isolation of RNA from hazelnut tissues and the determination of the quality of the obtained RNAs.ResultsThe quality and quantity of isolalated total RNAs were determined by spectrophotometer, electrophoresis and PCR. This success has been caught without any compromise of purity since A260/A280 ratios ranged from 1.90 to 2.04 and A260/A230 ratios were >2.0 in all purified RNAs.ConclusionThe total RNAs isolated with new protocol was found to be suitable for RNA sequencing and other molecular applications.

Two lithium tricyanomethanide compounds: syntheses and single-crystal structure determination of LiK[C(CN)3]2 and Li[C(CN)3]·½ (H3C)2CO

2015 ◽  
Vol 70 (3) ◽  
pp. 191-196 ◽  
Author(s):  
Olaf Reckeweg ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Structure Determination ◽  
Monoclinic Space Group ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Cell Parameters ◽  
New Compounds

AbstractThe new compounds LiK[C(CN)3]2 and Li[C(CN)3]·½ (H3C)2CO were synthesized and their crystal structures were determined. Li[C(CN)3]·½ (H3C)2CO crystallizes in the orthorhombic space group Ima2 (no. 46) with the cell parameters a=794.97(14), b=1165.1(2) and c=1485.4(3) pm, while LiK[C(CN)3]2 adopts the monoclinic space group P21/c (no. 14) with the cell parameters a=1265.7(2), b=1068.0(2) and c=778.36(12) pm and the angle β=95.775(7)°. Single crystals of K[C(CN)3] were also acquired, and the crystal structure was refined more precisely than before corroborating earlier results.

Electric and thermoelectric properties of CdTe/PbTe epitaxial nanocomposite

2014 ◽  
Vol 07 (06) ◽  
pp. 1440007
Author(s):  
Michal Szot ◽  
Krzysztof Dybko ◽  
Piotr Dziawa ◽  
Leszek Kowalczyk ◽  
Viktor Domukhovski ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Carrier Mobility ◽  
Room Temperature ◽  
Molecular Beam ◽  
High Quality ◽  
Polycrystalline Solid ◽  
Hall Effect Measurements ◽  
Shubnikov De Haas Oscillations

The electric and thermoelectric properties of novel, CdTe / PbTe layered nanocomposite material are investigated. The molecular beam epitaxy (MBE) method was used for preparation of samples with well controlled distances (from 20 to 70 nm) between the layers of CdTe nanograins embedded in PbTe thermoelectric matrix as well as with number of these layers from 2 to 10. The Hall effect measurements performed in temperature range from 4–300 K revealed that carrier mobility is strongly affected by scattering on CdTe grain boundaries. The observation of Shubnikov-de Haas oscillations confirms high quality of the samples and allows determination of effective mass of conducting electrons m* = 0.04m0. The measurements of the room temperature Seebeck coefficient together with electrical conductivity lead to the power factors which are comparable to those reported in PbTe / CdTe polycrystalline solid solutions.

The Constituents of Marine Sponges. V. The Isolation From Chelonaplysilla violacea (Dendroceratida) of Aplyviolene and Other Diterpenes, and the Determination of the Crystal Structure of Aplyviolene

1990 ◽  
Vol 43 (11) ◽  
pp. 1861 ◽  
Author(s):  
TW Hambley ◽  
A Poiner ◽  
WC Taylor
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Marine Sponge ◽  
Marine Sponges ◽  
Spectroscopic Methods ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
Deep Violet

From the deep violet, encrusting marine sponge Chelonaplysilla violacea, two rearranged spongian diterpenes, aplyviolene, (1R*,1′S*,3?aR*,5R*,6R*,8R*,8′aS*)-3-oxo-8-(1′,4′,4′-trimethyl-8′-methylenedecahydroazulen-1′-yl)-2,7-dioxabicyclo[3.2.1]oct-6-yl acetate (1), the acetoxy derivative, aplyviolacene (2), (5R*,8S*,9S*,10R*,13S*,14R* ,15S*,16R*)-spongian-15,16-diyl diacetate (3) and (5R*,8S*,9S*,10R*,13S*,14R*)-spongian-16-one (4) were isolated. The structures were determined by spectroscopic methods, and the structure of aplyviolene was confirmed by a single-crystal X-ray determination. The crystal structure was refined to a residual of 0.036 for 1125 independent observed reflections. The crystals were orthorhombic, space group P212121 with a 8.098(1), b 11.628(1), c 21.774(3)Ǻ.

Growth and Characterization of Single Crystal Epitaxial CoGa on MBE Grown III-V Semiconductors

1988 ◽  
Vol 144 ◽  
Author(s):  
K. C. Garrison ◽  
C. J. Palmstrøm ◽  
R. A. Bartynski
Keyword(s):  
Substrate Temperature ◽  
Single Crystal ◽  
Single Crystals ◽  
Structural Quality ◽  
High Quality ◽  
Auger Analysis ◽  
Post Deposition

ABSTRACTWe have demonstrated growth of high quality single crystal CoGa films on Ga1−xAlxAs. These films were fabricated in-situ by codeposition of Co and Ga on MBE grown Ga1−xAlxAs(100) surfaces. The elemental composition of the films was determined using Rutherford Backscattering (RBS) and in-situ Auger analysis. The structural quality of the films' surfaces was studied using RHEED (during deposition) and LEED (post deposition). RBS channeling was used to determine the bulk crystalline quality of these films.For ∼500 Å CoGa films grown at ∼450°C substrate temperature, channeling data showed good quality epitaxial single crystals [χmin ∼7%] with minimal dechanneling at the interface.

Modified Nextal crystallization device forin situinspection of protein crystal quality

2005 ◽  
Vol 38 (2) ◽  
pp. 396-397 ◽  
Author(s):  
Nobuhisa Watanabe
Keyword(s):  
Crystal Quality ◽  
Protein Crystal ◽  
X Rays ◽  
Resolution Limit ◽  
Physical Damage ◽  
Space Group ◽  
Cell Parameters

The modification and use of the Nextal crystallization device for checking the diffraction quality of protein crystalsin situis described. Using the modified device, crystals in the crystallization drop can be exposed to X-rays directly to observe the diffraction quality without physical damage to the crystal. If the crystals in the drop are well separated, not only the resolution limit of the crystal is estimated, but also determination of the space group and the cell parameters is possible.

scholarly journals DETERMINATION OF SOCIALIZATION FEATURES IN PHYSICAL EDUCATION STAFF TRAINING AS A SOCIAL AND EDUCATIONAL ISSUE

2017 ◽  
Vol 2017 (3) ◽  
pp. 43-49
Author(s):  
Любовь Стройкина ◽  
Liubov' Stroikina ◽  
Илья Ельцов ◽  
Il'ia El'tsov ◽  
Владимир Свинаренко ◽  
...  
Keyword(s):  
Physical Education ◽  
Professional Education ◽  
Personality Development ◽  
Theory And Practice ◽  
High Quality ◽  
Sport Sociology ◽  
Developmental Issues ◽  
Pedagogical Research

The article describes the theory and practice of inclusion of future physical education teacher in the process of refinement of the socialization concept. A productive study and clarification of the socialization concept is carried out in the courses of Theoretical Pedagogy and Practical pedagogy. The specificity of identifying and solving the problems of socialization depends on the involvement of future PE teachers in scientific and pedagogical research of optimal possibilities for personality development in the constructs of self-realization and self-affirmation. The determination of the socialization category is a complex pedagogically corrected process. The quality of the detailed definitions in the professional education model is a unique tool that guarantees a high quality of solution for developmental issues. The specifics of the choice of the direction for the specification of socialization category depend on the sport chosen by future PE teachers. The quality of socialization as a product of anthropo-sphere and education evolution can be learned from the portfolio kept by the student. The features of high-quality solutions are defined in the pedagogical constructs and pedagogical conditions of modern education, and socialization is no exception as a multidimensional phenomenon and the product of social and educational relations. The specificity of the clarification of the socialization category can be found in the structure of the module "Social pedagogy", "Pedagogy of physical culture and sport", "Sociology of Sport." The Kemerovo State University (Novokuznetsk branch) pays special attention at the technology of system-pedagogical modeling that makes it possible to include future PE teachers into modeling and specification of "socialization" category.

scholarly journals Evaluation of competitiveness of retail enterprises in Nalchik

2020 ◽  
Vol 82 (1) ◽  
pp. 404-408
Author(s):  
I. S. Dzakhmisheva
Keyword(s):  
Retail Trade ◽  
Economic Indicators ◽  
High Quality ◽  
Weighting Factors ◽  
Regional Characteristics ◽  
Trading Company ◽  
Goods And Services ◽  
Sequence Selection

The article defines the ability of retailers, the ability of retailers to meet the requirements of consumers in high-quality products and trade services, taking into account local or regional characteristics. A generalization of the existing terminology allows us to understand the competitiveness of retailers as the ability of a retailer to meet the requirements of consumers in high-quality products and trading services taking into account local or regional characteristics. Assessment of the competitiveness level of a retail trade enterprise is carried out in the following sequence: selection of criteria and their assessment; determination of criteria weighting factors; calculation of a generalized criterion. To calculate the generalized competitiveness level of a retail trade enterprise, criteria and their scores are proposed, and their weighting factors are determined. An essential criterion for the competitiveness of retail enterprises is the degree to which they meet their real needs, which determines the different attractiveness of competitors to consumers. A direct comparison of retail enterprises in a series of similar ones (selling similar products or providing the same services) was carried out according to the main parameters (indicators): the atmosphere of the store, the internal environment of the store, the quality of goods and services, the image of the enterprise; financial and economic indicators. A comparative assessment of the competitiveness of retail trade enterprises has made it possible to establish that the Deya hypermarket is the most competitive trading enterprise. Along with this, it is necessary to direct the activities of the hypermarket to improve the financial and economic component and increase the image of the enterprise. One of the ways to increase the financial and economic indicators of a trading company is merchandising.

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