scholarly journals Differentiation of the four-reciprocal system Li, Na // F, Br, NO3 using innovative methodology

2017 ◽  
Vol 21 (3) ◽  
pp. 174-180
Author(s):  
O.E. Morgunova ◽  
E.A. Katasonova ◽  
A.S. Trunin ◽  
M.A. Loseva
Keyword(s):  
Reciprocal System ◽  
Eutectic Structure ◽  
Medium Temperature ◽  
Alkaline Metals ◽  
Innovative Methodology ◽  
Mutual System ◽  
First Time

Systems with participation of nitrates and halogenides of alkaline metals find more and more broad practical application.The four-component mutual system Li, Na // F, Br, NO3 is for the first time described and studied. With the use of innovative methodology of research for the system Li, Na // F, Br, NO3 the model of a tree of phases confirmed experimentally with the DTA method is constructed. The power-intensive three- fold eutectic structure of LiF-LiNO3-NaBr with a temperature of melting of 220,8 ◦C for application as the medium temperature heataccumulator is revealed.

Study of the quaternary Na+, K+//F−, Br−, NO 3 − reciprocal system using an innovative methodology

2016 ◽  
Vol 2016 (8) ◽  
pp. 746-751
Author(s):  
O. E. Morgunova ◽  
A. S. Ukhanov ◽  
E. A. Katasonova ◽  
A. S. Trunin ◽  
K. D. Surinskii
Keyword(s):  
Reciprocal System ◽  
Innovative Methodology

Old wine in a new bottle: money demand causality for 10 Asian countries

2015 ◽  
Vol 10 (3) ◽  
pp. 491-503 ◽  
Author(s):  
Ahdi Noomen Ajmi ◽  
Nicholas Apergis ◽  
Ghassen El Montasser
Keyword(s):  
Money Demand ◽  
Meta Analysis ◽  
Variable Coefficients ◽  
Content Type ◽  
Real Money ◽  
Policy Tool ◽  
Time Estimates ◽  
Innovative Methodology ◽  
Asian Economies ◽  
First Time

Purpose – The purpose of this paper is to estimate causality properties between real money demand and a number of determinants, i.e., real output, the lending rate and the real exchange rate, across ten Asian economies. Design/methodology/approach – The study makes use of the causality methodology of Emirmahmutoglu and Kose (2011) over the period 1990-2012. Findings – The results document both bidirectional and unidirectional causality between monetary aggregates (M1 and M2) and their determinants for different country groups. Research limitations/implications – The empirical findings exemplify the role of the demand for money as a policy tool and can provide useful policy guidelines to the Asian central banks in their quest for price stability. Originality/value – This paper for the first time estimates causality properties between real money demand and a number of determinants, across ten Asian economies that have not used before in the literature. In addition, it employs the innovative methodology of Emirmahmutoglu and Kose (2011). The advantages of this approach are: it overcomes the problem of pre-testing needs to determine the order of integration, the lag orders on the autoregressive coefficients as well as the exogenous variable coefficients are mixed for all the cross-section units of the sample, and it is based on the approach of Meta-analysis which is capable of obtaining common results, combining those provided by a number of independent studies which test the same hypothesis.

scholarly journals Роль избыточного марганца в формировании структуры и транспортных свойств манганита (Nd-=SUB=-0.67-=/SUB=-Sr-=SUB=-0.33-=/SUB=-)-=SUB=-1-x-=/SUB=-Mn-=SUB=-1+x-=/SUB=-О-=SUB=-3-=/SUB=- (x=0; 0.2), спеченного при 1273-1473 K

2018 ◽  
Vol 60 (7) ◽  
pp. 1378
Author(s):  
А.А. Новохацкая ◽  
Г.Я. Акимов
Keyword(s):  
Electrical Conductivity ◽  
Fuel Element ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
High Electrical Conductivity ◽  
Medium Temperature ◽  
Temperature Range ◽  
Fuel Elements ◽  
First Time

AbstractThe Nd_0.67Sr_0.33MnO_3 manganite is a material promising for application as a cathode for medium-temperature solid oxide fuel elements. A high electrical conductivity of such a cathode is the parameter determining the efficiency of the operation of a fuel element. In this report, the effect of influence of excess manganese on the structure and the conductivity of manganite ceramics with compositions (Nd_0.67Sr_0.33)_1– x Mn_1 + x O_3± Δ ( x = 0, 0.2) sintered at temperatures 1273–1673 K is presented for the first time. The existence of 20% excess manganese in the initial manganite powder after sintering is shown to lead to that the conductivity of the obtained ceramics in the temperature range 823–1073 K is several times higher than the conductivity of the ceramics without excess manganese.

Sol–gel synthesis of mesoporous CaFe2O4 photocathodes with hierarchical pore morphology

2019 ◽  
Vol 3 (5) ◽  
pp. 1150-1153 ◽  
Author(s):  
Kristin Kirchberg ◽  
Roland Marschall
Keyword(s):  
Sol Gel ◽  
Dip Coating ◽  
Pore Morphology ◽  
Medium Temperature ◽  
Hierarchical Pore ◽  
Sol Gel Synthesis ◽  
First Time

Hierarchical mesoporous p-CaFe2O4 photocathodes are for the first time prepared by sol–gel dip-coating and calcination at only medium temperature (700 °C).

scholarly journals Low temperature isomerizational transformation of gas gasoline on modified zeolite catalysts

2020 ◽  
Vol 62 (5) ◽  
pp. 43-50
Author(s):  
Malahat Tagi kizi Mamedova ◽  
Keyword(s):  
Low Temperature ◽  
Total Concentration ◽  
Zeolite Catalysts ◽  
Medium Temperature ◽  
Catalytic Systems ◽  
Skeletal Isomerisation ◽  
Efficient Processing ◽  
First Time ◽  
Liquid Alkanes ◽  
High Octane

New multicomponent catalytic systems synthesized by modifying zeolites (НМOR17 and HZSM-5) and γ-Al2O3 with metals (Co, Ni), zirconium dioxide and subsequent sulfation and tungestation of the obtained samples. It was shown that the introduction of zirconia into the M/MOR (where M = Co, Ni) system allows one to lower the isomerization temperature by 140-160°С, turning the medium-temperature skeletal-isomerisation catalyst M/MOR into a low-temperature M/MOR/ZrO2. It was found that sulfated Co/MOR/ZrO2/SO42- and Co/HZSM-5/ZrO2/SO42- have a higher isomerization activity, which makes it possible to increase the content of isomeric C5-C6 components with high octane numbers in gas gasoline from 43 to 66%. It was found that upon contacting the gas gasoline with the Co/MOR/ZrO2/SO42- or Co/HZSM-5/ZrO2/SO42- catalytic systems, efficient processing of higher molecular weight C7+ alkanes occurs not only into iso-C5 and C6, but also into n-pentane whose content in contact products rises from 19 to 40%. For the first time it was found that at temperatures of 160-200 °C, impurity gaseous C4- alkanes in the gas gasoline are consumed of when contacted with synthesized catalysts, turning into liquid alkanes. It was established that sulfated catalysts have more isomerizing activity in the low-temperature isomerization conversion of gas gasoline than volframated ones. The effect of the concentration of SO42- ions on the activity of the catalysts was studied and it was found that 2 wt.% is satisfactory for the studied catalysts. The temperature dependence of the activity of the most active of the synthesized catalysts in this process – Co/HZSM-5/ZrO2/SO42-, was studied. The results showed that the optimum temperature for the isomerization functioning of the selected catalyst is 180 oC. The change in the activity of the optimal catalyst (Co/HZSM-5/ZrO2/SO42-) depending on the reaction period was also studied. It was established that with the course of the process, the activity of the catalyst increases and reaches a maximum of 30 minutes work. After this, the activity of the catalyst gradually decreases. In this case, the total concentration of iso-C5 and iso-C6 increases by 22.9% and reaches 66.1%, and the conversion of C7+ components of gas gasoline is 69.2%.

Combination effect pigments with enhanced fluorescence

2019 ◽  
Vol 48 (4) ◽  
pp. 277-292
Author(s):  
Sevinç Sevim Kahya ◽  
Yasemin Sönmez ◽  
Güngör Gündüz ◽  
Bora Mavis
Keyword(s):  
Design Methodology ◽  
Dye Molecules ◽  
Enhanced Fluorescence ◽  
Medium Temperature ◽  
Organic Pigment ◽  
Content Type ◽  
Zinc Phthalocyanines ◽  
Fluorescence Characteristics ◽  
First Time ◽  
Temperature Time

Purpose The purpose of this paper is to enhance the limited fluorescence of mica titania (MT) effect pigments by coating them with peripherally substituted zinc phthalocyanines (ZnPc). Design/methodology/approach The effects of deposition medium, temperature, time, initial organic pigment/MT ratio on deposition behaviour and efficiencies were investigated separately for ZnPc, nitro (TNZnPc) and amino (TAZnPc) substituted ZnPc’s. Findings TNZnPc could be deposited in the form of well-defined crystals on MT with per cent 64 ± 5 efficiency in chloroform at 50°C within 5 h and the amount deposited was linearly dependent on the initial TNZnPc concentration. TNZnPc fluorescence emissions, which appear mainly at 460 and 685 nm in pure pigments, could be observed in combination with MT (MT-TNZnPc) as well. A spectral analysis on the non-overlapping region of the spectrum with two different excitations (385 and 630 nm) revealed that, respectively, up to threefold to sixfold increase is possible to attain, depending on the excitation wavelengths. Research limitations/implications Efficiency of deposition could not be taken above per cent 11 ± 4 with TAZnPc. Although ZnPc could be deposited with per cent 57 ± 3 efficiency, the pigment was not effective in imposing its fluorescence characteristics over MT. Originality/value Combining inorganic effect pigments with organic dye molecules is an idea that has been elaborated mainly for producing different colour effects and stabilization of dye molecules against agglomeration. Here, for the first time, it is used to enhance the fluorescence of the effect pigments.

scholarly journals Investigation of the mechanical properties of composite polymer electrolytes based on CsH2PO4

2021 ◽  
Vol 340 ◽  
pp. 01044
Author(s):  
Irina Bagryantseva ◽  
Daria Dormidonova ◽  
Valentina Ponomareva
Keyword(s):  
Mechanical Properties ◽  
Polymer Electrolytes ◽  
Vickers Microhardness ◽  
Volume Fraction ◽  
Composite Polymer ◽  
Medium Temperature ◽  
Composite Polymer Electrolytes ◽  
Hybrid Compounds ◽  
First Time ◽  
Conducting Membranes

The mechanical properties of the CsH2PO4 and hybrid compounds with different polymers (SKF-26, UPTFE, Butvar B-98) was determined by the Vickers microhardness test for the first time. It was shown that increase in the volume fraction of the polymer results in the low HV values corresponding to the high robustness of the membranes to plastic deformation. Mechanical properties of hybrid compounds depend on polymer type and the best results were obtained for SKF-26. The improvement of mechanical properties makes the investigated composite polymer electrolytes promising for use as proton-conducting membranes in the medium-temperature range.

Synthesis of cobalt-doped bismuth vanadate by combustion-synthesis: Influence of fuel on phase content and morphology

2009 ◽  
Vol 24 (10) ◽  
pp. 3078-3086 ◽  
Author(s):  
Banasri Roy ◽  
Paul A. Fuierer
Keyword(s):  
Heat Treatment ◽  
Treatment Temperature ◽  
Bismuth Vanadate ◽  
Phase Content ◽  
Solution Combustion ◽  
Medium Temperature ◽  
Oxygen Ion ◽  
Lower Temperature ◽  
First Time ◽  
Combustion Technique

Cobalt (15 at.%) doped bismuth vanadate, Bi4(V0.85Co0.15)2O11-δ (BICOVOX0.15), is known to have high oxygen ion conduction in the medium temperature range (400–600 °C). Small grain size may be important in stabilizing the highly conductive and disordered γ-phase at lower temperature. In this article, we report for the first time the synthesis of highly porous nanoscale BICOVOX powders by a solution combustion technique. The effects of fuel-to-oxidizer ratio, and postcombustion heat treatment temperature and time on the phase content and microstructure of the powders were investigated. As-combusted powders were revealed to be a mixture of Bi2O3, BiVO4, and γ-BICOVOX phases that were converted to phase pure γ-BICOVOX during heat treatment.

scholarly journals ALARP Criteria to Estimate Acceptability and Tolerability Thresholds of the Investment Risk

2021 ◽  
Vol 11 (19) ◽  
pp. 9086
Author(s):  
Gabriella Maselli ◽  
Maria Macchiaroli ◽  
Antonio Nesticò
Keyword(s):  
Decision Making ◽  
Rate Of Return ◽  
Decision Making Process ◽  
Investment Risk ◽  
Threshold Values ◽  
Project Risk ◽  
Limit Values ◽  
Innovative Methodology ◽  
Company Sector ◽  
First Time

Assessing the riskiness of investments in civil works is an integral part of the decision-making process. The main limitation is the absence, both in the regulatory landscape and in the literature of the sector, of threshold values that can guide the analyst in expressing an assessment on the acceptance of the investment risk. The aim of the paper is to define a risk management model that overcomes this gap by introducing acceptability and tolerability thresholds for project risk. The idea is to jointly use: (i) the As Low As Reasonably Practicable (ALARP) logic, from which the concepts threshold of acceptability and tolerability of risk derive, for the first time applied to assess the project risk in the civil field; (ii) the Capital Asset Pricing Model (CAPM) and statistical methods to define an innovative methodology for estimating the aforementioned threshold values. According to the proposed approach, these risk limit values can be specified according to both the investment sector and the socio-economic context of the project. The implementation of the methodology in the civil company sector in Europe allows to validate the described model. The elaborations show that the financial performance of the project is widely acceptable if the Expected Internal Rate of Return is greater than 7.8%; unacceptable if the expected rate of return is less than 5.6%; and tolerable as an ALARP if the expected rate is between 5.6% and 7.8%. The estimated acceptability and tolerability thresholds can provide the economic operator with a more immediate and consistent evaluation of the triangular balance of risks, costs, and benefits. This allows the decision-making process to become more rational and transparent.

Annulate lamellae in the Sertoli cells of guinea pig testis after unilateral torsion of the spermatic cord

1984 ◽  
Vol 42 ◽  
pp. 196-197
Author(s):  
J. Chakraborty ◽  
A. P. Sinha Hikim ◽  
J. S. Jhunjhunwala
Keyword(s):  
Sertoli Cells ◽  
Guinea Pigs ◽  
Spermatic Cord ◽  
Present Report ◽  
Cell Types ◽  
Annulate Lamellae ◽  
Spermatogenic Cells ◽  
Electron Microscopic ◽  
Structural Details ◽  
First Time

Although the presence of annulate lamellae was noted in many cell types, including the rat spermatogenic cells, this structure was never reported in the Sertoli cells of any rodent species. The present report is based on a part of our project on the effect of torsion of the spermatic cord to the contralateral testis. This paper describes for the first time, the fine structural details of the annulate lamellae in the Sertoli cells of damaged testis from guinea pigs.One side of the spermatic cord of each of six Hartly strain adult guinea pigs was surgically twisted (540°) under pentobarbital anesthesia (1). Four months after induction of torsion, animals were sacrificed, testes were excised and processed for the light and electron microscopic investigations. In the damaged testis, the majority of seminiferous tubule contained a layer of Sertoli cells with occasional spermatogonia (Fig. 1). Nuclei of these Sertoli cells were highly pleomorphic and contained small chromatinic clumps adjacent to the inner aspect of the nuclear envelope (Fig. 2).

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