550 research outputs found
Oxidative dehydrogenation of 2,3,5-trimethyl-1,4-hydroquinone in the presence of titanium dioxide hydrogel
Liquid-phase oxidative dehydrogenation of 2,3,5-trimethyl-1,4-hydroquinone in the presence of titanium dioxide hydrogel was studied by a kinetic method. Associative interactions between the substrate, oxidant, and gel were detected by voltammetry and ESR and IR spectroscopy.Russian Foundation for Basic Researc
Open star clusters in the Milky Way - Comparison of photometric and trigonometric distance scales based on Gaia TGAS data
The global survey of star clusters in the Milky Way (MWSC) is a comprehensive
list of 3061 objects that provides, among other parameters, distances to
clusters based on isochrone fitting. The Tycho-Gaia Astrometric Solution (TGAS)
catalogue, which is a part of Gaia data release 1 (Gaia DR1), delivers accurate
trigonometric parallax measurements for more than 2 million stars, including
those in star clusters. We compare the open cluster photometric distance scale
with the measurements given by the trigonometric parallaxes from TGAS to
evaluate the consistency between these values. The average parallaxes of
probable cluster members available in TGAS provide the trigonometric distance
scale of open clusters, while the photometric scale is given by the distances
published in the MWSC. Sixty-four clusters are suited for comparison as they
have more than 16 probable members with parallax measurements in TGAS. We
computed the average parallaxes of the probable members and compared these to
the photometric parallaxes derived within the MWSC. We find a good agreement
between the trigonometric TGAS-based and the photometric MWSC-based distance
scales of open clusters, which for distances less than 2.3 kpc coincide at a
level of about 0.1 mas with no dependence on the distance. If at all, there is
a slight systematic offset along the Galactic equator between and
galactic longitude.Comment: Accepted for publication as a Letter in Astronomy and Astrophysics, 4
pages, 4 figure
Peculiarities of the communicative-speech competences of the infants with deviations in language development
Only in the process of communication it is possible to find means which are necessary for interaction.
Primary nonverbal means of establishing communicative interaction are improving in continuous
practice of communication. Non-verbal means of communication are developing and are improving
through communicative gestures and as the add-in under already formed means of communication,
the words appear - the first means of verbal communication. Thus, communication with close adults
provides the formation of the communicative – speech competences of children. This understanding of
the ontogeny of the formation of the communicative-speech competences allows us to draw a
conclusion about the gradual displacement of non-verbal means of verbal communication. Moreover,
these non-verbal means of communication do not disappear, but they are transferred from fixed
assets in the subsidiary. In the context of the studied theme: the communicatively-speech
competences of children of early ages are non-verbal and verbal means of interaction with close
adults and the methods of their usage with the purpose of reaching the appearing of household,
gaming, cognitive and creative needs. To achieve the aim of exploring we used the methods of
diagnostics of psycho-speech development of the child of early ages (E. V. Sheremetyeva, 2013),
which allowed us to make a communicative-speech profile of the child.In the exploring were involved
40 children of the third year of life. On the basis of the obtained data, we can conclude that young
children with deviations in language development in contrast to children with normal speech
development have not sufficiently formed communicative-speech competences, which negatively
affects the productivity of communication. The information of our experimental exploring is the basis
for development of complex methods and methods of psychological and pedagogical support of the
formation of communicative and speech competences of children with deviations in language
development
The budgeting mechanism in development companies
Relevance of the researched problem is caused by the fact that today there is a requirement for a unique, generalized, theoretically and methodically elaborated budgeting mechanism disaggregating the aims of strategic level to the level of structural units of the company. The aim of article is to develop methodical provisions and practical recommendations to harmonize a budgeting mechanism of development companies on the basis of direct interrelation of current budgeting and strategic objectives of company development. The leading approach to a research of this problem is the classical approach allowing revealing sources and directions of financial resources application of commercial organizations and also ensuring their balance. The main results of a research are the expansion of a budgeting concept as a type of financial planning, the author’s technique of budgeting is suggested that is based on the indicators of assets turnover ratio, sales profitability and return on assets as the main characteristics of activity efficiency of a development company. Materials of the article can be useful in financial management enhancement and forming an effective budgeting mechanism in development companies. © 2016 Kovaleva et al
METHODOLOGICAL APPROACHES TO EVALUATING BEER AND NON-ALCOHOLIC PRODUCTS SHELF LIFE
The article discusses the relevance of developing methodological approaches to the beer and soft drinks accelerated aging method in the market. The controlled indicators selection principles, mainly affecting the quality of the finished product, and the basic equation describing the dependence of changes in indicators on the main temperature factor are given. Studies of the influence of various physical factors (temperatures in the range of 50–60 °C, UV-radiation), both individually and jointly, on the physicochemical and organoleptic characteristics of packaged water for various experimental versions did not show statistically significant changes in the normalized parameters of the basic salt and microelement composition investigated water during storage. The optimal mode of accelerated «aging» of packaged water at an elevated temperature (up to 60 °C) and UV-radiation was established. In the case of soft drinks, thermostating was used when changing the temperature regimes (heat 50 ± 2 °C / cold 6 ± 2 °C) at an exposure time of 30 days, which made it possible to observe a decrease in taste and aroma compared with the control, as well as a decrease in sweetness and the appearance of a slight plastic taste for non-carbonated drink. The influence a temperature regime change on brewing products, which cannot be estimated using the existing method due to the high turbidity, is shown.The article discusses the relevance of developing methodological approaches to the beer and soft drinks accelerated aging method in the market. The controlled indicators selection principles, mainly affecting the quality of the finished product, and the basic equation describing the dependence of changes in indicators on the main temperature factor are given. Studies of the influence of various physical factors (temperatures in the range of 50–60 °C, UV-radiation), both individually and jointly, on the physicochemical and organoleptic characteristics of packaged water for various experimental versions did not show statistically significant changes in the normalized parameters of the basic salt and microelement composition investigated water during storage. The optimal mode of accelerated «aging» of packaged water at an elevated temperature (up to 60 °C) and UV-radiation was established. In the case of soft drinks, thermostating was used when changing the temperature regimes (heat 50 ± 2 °C / cold 6 ± 2 °C) at an exposure time of 30 days, which made it possible to observe a decrease in taste and aroma compared with the control, as well as a decrease in sweetness and the appearance of a slight plastic taste for non-carbonated drink. The influence a temperature regime change on brewing products, which cannot be estimated using the existing method due to the high turbidity, is shown
TiOCl, an orbital-ordered system?
We present first principles density functional calculations and downfolding
studies of the electronic and magnetic properties of the layered quantum spin
system
TiOCl. We discuss explicitely the nature of the exchange pathes and attempt
to clarify the concept of orbital ordering in this material. An analysis of the
electronic structure of slightly distorted structures according to the phononic
modes allowed in this material suggests that this system is subject to large
orbital fluctuations driven by the electron-phonon coupling. Based on these
results, we propose a microscopic explanation of the behavior of TiOCl near the
phase transition to a spin-gapped system.Comment: Some figures are compressed, for higher quality please contact the
author
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