Relationships between Anhydrous and Solvated Species of Dexketoprofen Trometamol: A Solid-State Point of View

2019 ◽  
Vol 20 (1) ◽  
pp. 226-236 ◽  
Author(s):  
Patrizia Rossi ◽  
Paola Paoli ◽  
Laura Chelazzi ◽  
Stella Milazzo ◽  
Diletta Biagi ◽  
...  
Keyword(s):  
Solid State ◽  
Point Of View ◽  
State Point ◽  
Dexketoprofen Trometamol

scholarly journals Organotin(IV) selenate derivatives – Crystal structure of [{(Ph3Sn)2SeO4} ⋅ CH3OH] n

2021 ◽  
Vol 44 (1) ◽  
pp. 213-217
Author(s):  
Waly Diallo ◽  
Hélène Cattey ◽  
Laurent Plasseraud
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Hydrogen Bonds ◽  
Point Of View ◽  
Intermolecular Hydrogen Bonds

Abstract Crystallization of [(Ph3Sn)2SeO4] ⋅ 1.5H2O in methanol leads to the formation of [{(Ph3Sn)2SeO4} ⋅ CH3OH] n (1) which constitutes a new specimen of organotin(IV) selenate derivatives. In the solid state, complex 1 is arranged in polymeric zig-zag chains, composed of alternating Ph3Sn and SeO4 groups. In addition, pendant Ph3Sn ⋅ CH3OH moieties are branched along chains according to a syndiotactic organization and via Sn-O-Se connections. From a supramolecular point of view, intermolecular hydrogen bonds established between the selenate groups (uncoordinated oxygen) and the hydroxyl functions (CH3OH) of the pendant groups link the chains together.

scholarly journals Precursor Phenomena of Barium Titanate Single Crystals Grown Using a Solid-State Single Crystal Growth Method Studied with Inelastic Brillouin Light Scattering and Birefringence Measurements

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3171 ◽  
Author(s):  
Soo Han Oh ◽  
Jae-Hyeon Ko ◽  
Ho-Yong Lee ◽  
Iwona Lazar ◽  
Krystian Roleder
Keyword(s):  
Crystal Growth ◽  
Solid State ◽  
Barium Titanate ◽  
Single Crystal ◽  
Single Crystals ◽  
Melting Process ◽  
Point Of View ◽  
Crystal Quality ◽  
Cubic Phase ◽  
Growth Method

The nature of precursor phenomena in the paraelectric phase of ferroelectrics is one of the main questions to be resolved from a fundamental point of view. Barium titanate (BaTiO3) is one of the most representative perovskite-structured ferroelectrics intensively studied until now. The pretransitional behavior of BaTiO3 single crystal grown using a solid-state crystal growth (SSCG) method was investigated for the first time and compared to previous results. There is no melting process in the SSCG method, thus the crystal grown using a SSCG method have inherent higher levels of impurity and defect concentrations, which is a good candidate for investigating the effect of crystal quality on the precursor phenomena. The acoustic, dielectric, and piezoelectric properties, as well as birefringence, of the SSCG-grown BaTiO3 were examined over a wide temperature range. Especially, the acoustic phonon behavior was investigated in terms of Brillouin spectroscopy, which is a complementary technique to Raman spectroscopy. The obtained precursor anomalies of the SSCG-grown BaTiO3 in the cubic phase were similar to those of other single crystals, in particular, of high-quality single crystal grown by top-seeded solution growth method. These results clearly indicate that the observed precursor phenomena are common and intrinsic effect irrespective of the crystal quality.

Conception and numerical simulation of heat and mass transfer in a solid state hydrogen storage reactor

2019 ◽  
Vol 87 (2) ◽  
pp. 20902 ◽  
Author(s):  
Amine Alaoui-Belghiti ◽  
Mourad Rkhis ◽  
Said Laasri ◽  
Abdelowahed Hajjaji ◽  
Mohamed Eljouad ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
Hydrogen Storage ◽  
Physical Phenomenon ◽  
Point Of View ◽  
Momentum Balance ◽  
Bed Temperature ◽  
Hydrogen Supply ◽  
Hydrogen Storage Performance ◽  
The Impact

Nowadays energy storage seems to be a vital point in any new energy paradigm. It has become an important and strategic issue, to ensure the energetic sufficiency of humanity. Indeed, hydrogen storage in solids has been proved and revealed as clean and efficient energy storage. Moreover, it can be thought as a seriously considered solution to enable renewable energy to be a part of our quotidian life. To achieve storing hydrogen in solid form, the present study aimed to concepts and simulates a solid-state hydrogen storage reactor (tank). An investigation of the parameters influencing the hydrogen storage performance is carried out. Meanwhile, to understand the physical phenomenon taking place during the storage of hydrogen, a 2D numerical modelling for a metal hydrides-based in hydrogen reactor is presented. A strong coupling between energy balance, kinetic law, as well as a mass momentum balance at sorbent bed temperature under a non-uniform pressure was resolved based on finite element method. The temporal evolutions of pressure, the raising temperature in the bed during the hydriding process as well as the impact of the hydrogen supply pressure within the tank are analysed and validated by comparison with the experimental work in literature, a good agreement is obtained. From an industrial point of view, this study can be used to design and manufacture an optimal solid-state hydrogen storage reactor.

scholarly journals Assessment of Crystalline Materials for Solid State Lighting Applications: Beyond the Rare Earth Elements

Crystals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 559 ◽  
Author(s):  
Pier Carlo Ricci
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Rare Earth Elements ◽  
Light Emitting Diode ◽  
Metal Organic Framework ◽  
Point Of View ◽  
White Leds ◽  
Critical Issues ◽  
Lighting Systems ◽  
Incandescent Lamps

In everyday life, we are continually exposed to different lighting systems, from the home interior to car lights and from public lighting to displays. The basic emission principles on which they are based range from the old incandescent lamps to the well-established compact fluorescent lamps (CFL) and to the more modern Light Emitting Diode (LEDs) that are dominating the actual market and also promise greater development in the coming years. In the LED technology, the key point is the electroluminescence material, but the fundamental role of proper phosphors is sometimes underestimated even when it is essential for an ideal color rendering. In this review, we analyze the main solid-state techniques for lighting applications, paying attention to the fundamental properties of phosphors to be successfully applied. Currently, the most widely used materials are based on rare-earth elements (REEs) whereas Ce:YAG represents the benchmark for white LEDs. However, there are several drawbacks to the REEs’ supply chain and several concerns from an environmental point of view. We analyze these critical issues and review alternative materials that can overcome their use. New compounds with reduced or totally REE free, quantum dots, metal–organic framework, and organic phosphors will be examined with reference to the current state-of-the-art.

Synthesis of Transition Metal Epitaxial Silicides on Silicon (100), (111)

1988 ◽  
Vol 128 ◽  
Author(s):  
V. V. Tokarev ◽  
V. E. Borisenko ◽  
T. M. Pyatkova
Keyword(s):  
Solid State ◽  
Transition Metal ◽  
Epitaxial Growth ◽  
Solid State Reaction ◽  
Systematic Investigation ◽  
Point Of View ◽  
Semiconductor Interface ◽  
Epitaxial Structure ◽  
Silicide Growth ◽  
New Devices

Epitaxial silicide growth is of great interest to many researchers and process engineers working in the field of microelectronics. The interest towards epitaxial silicides is due, firstly to the fact that these structures are suitable for systematic investigation of physics of a metal-semiconductor interface, and secondly that epitaxial intermetallic structures on silicon allow development of new devices such as threedimensional ones. At present, however, one can successfully form layers with epitaxial structure with thickness of no more than 150 nm using solid-state reaction in the metal layersilicon substrate system. Such values satisfy researchers dealing with problems of epitaxial growth because main processes occur in the range of 10–20 Å [1]From a technological point of view, however, it is desirable to form layers with thickness up to 1 μm.

Rubber and Artificial Resins as “Liquids with Fixed Structures”

1941 ◽  
Vol 14 (4) ◽  
pp. 778-785
Author(s):  
Kurt Ueberreiter
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Industrial Production ◽  
Organic Materials ◽  
Point Of View ◽  
Artificial Materials ◽  
Theoretical Reasoning

Abstract Numerous investigations, particularly in recent years, have served to throw much light on the relation between the inner structure and mechanical properties of artificial substances. The rapidly developing, industrial production of artificial materials has given considerable impetus to these investigations, since, as has often been pointed out, the solid state of organic materials represents the practical and usable form of artificial products. Basing his opinion on the fundamental researches of Tammann, Jenckel has classified many artificial substances as glasses; Houwink and others have seen in colloidal structures certain fundamentally important principles; and Kuhn, starting from purely theoretical reasoning, has explained rubberlike elasticity on a basis of molecular kinetics. In renewing the study of the freezing of liquids, an idea was developed which proved to be very helpful in guiding further research, and represented a step toward a better understanding of earlier theories. This new point of view will be discussed in the following pages.

scholarly journals Comparison of the dehydration kinetics of solid state compounds of 2-methoxybenzylidenepyruvate with some divalent metal ions

2010 ◽  
Vol 35 (1) ◽  
pp. 7-18
Author(s):  
M. Kobelnik ◽  
C. A. Ribeiro ◽  
D. S. Dias ◽  
G. A. Bernabé ◽  
M. S. Crespi
Keyword(s):  
Activation Energy ◽  
Solid State ◽  
Nitrogen Atmosphere ◽  
Divalent Metal ◽  
Point Of View ◽  
Conversion Degree ◽  
Divalent Metal Ions ◽  
Heating Rates ◽  
Exponential Factor ◽  
Kinetics Of

Divalent metal complexes of ligand 2-methoxybenzylidenepyruvate with Fe, Co, Ni, Cu and Zn as well as sodium salt were synthesized and investigated in the solid state. TG curves of these compounds were obtained with masses sample of 1 and 5mg under nitrogen atmosphere. Different heating rates were used to characterize and study these compounds from the kinetic point of view. The activation energy and pre-exponential factor were obtained applying the Wall-Flynn-Ozawa method to the TG curves. The obtained data were evaluated and the values of activation energy (Ea / kJ mol-1) was plotted in function of the conversion degree (α). The results show that due to mass sample, different activation energies were obtained. The results are discussed mainly taking into account the linear dependence between the activation energy and the pre exponential factor, where was verified the effect of kinetic compensation (KCE) and possible linear relations between the dehydrations steps of these compounds.

Investigating Radioactive Content in Various Commercially available Flour Samples in Local Iraqi Markets

2021 ◽  
Vol 19 (9) ◽  
pp. 06-13
Author(s):  
Abdalsattar Kareem Hashim ◽  
Abbas Rashid Al-Ghanimi ◽  
Sanaa Mohammed Ridha Hasan ◽  
Tamara Ali Naser ◽  
Ahmed Jumaah Mhawes
Keyword(s):  
Solid State ◽  
Uranium Concentration ◽  
Mean Value ◽  
Point Of View ◽  
Radium Content

The study was conducted to assess the radioactivity of alpha concentration of different samples of flour in Karbala mills and some samples in local Iraqi markets. Alpha sensitive CR-39 plastic paths detectors commonly know as "Solid State Nuclear paths Detectors" were used measuring the concentrations of uranium, efficaious radium content, and ratio of radon. The results indicate that the exhalation levels of mass and surface radon were between 0.214-0.549 mBq/kg.h, and 4.35 -11.185 mBq/m2.h, respectively, with an mediam of 0.385 mBq/kg.h and 7.691 mBq/m2.h. The effective radium content values range from 28 to 78 mBq/kg with an mediam value of 51.06 mBq/kg, respectively. The concentration of uranium values ranges from 0.334 to 0.858 Bq/kg, with a mean value of 0.602 Bq/kg. The measurements of the radon, radium, and uranium concentration in each sample are significant in terms of health safeguard point of view. Hence, easy, and accurate techniques of analysis are highly demanded.

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