Methodical aspects of experimental studies for the relationship of static and dynamic features of crystal structure: application of various atomic scattering factors to study the vibrational characteristics of molecular crystals

2014 ◽  
Vol 63 (10) ◽  
pp. 2224-2234 ◽  
Author(s):  
I. V. Ananyev ◽  
Yu. V. Nelyubina ◽  
K. A. Lyssenko
Keyword(s):  
Crystal Structure ◽  
Experimental Studies ◽  
Molecular Crystals ◽  
Dynamic Features ◽  
Vibrational Characteristics ◽  
Atomic Scattering ◽  
Relationship Of ◽  
The Relationship

Application of Galvanic Zinc-Iron Coating in the Repair of Transport and Technological Machines

2021 ◽  
Vol 1022 ◽  
pp. 181-193
Author(s):  
Dmitry M. Rozhkov ◽  
Evgenia V. Eltoshkina ◽  
Petr I. Ilyin ◽  
Olga A. Svirbutovich
Keyword(s):  
Experimental Studies ◽  
Iron Alloy ◽  
Resource Saving ◽  
Experimental Base ◽  
Optimal Resource ◽  
Iron Coating ◽  
Saving Mode ◽  
Relationship Of ◽  
The Relationship ◽  
Kinetics Of

The article presents the results of experimental studies to determine the relationship between the electrolysis modes and the properties of electroplating coatings for mathematical modeling of the dynamics of the electrolytic process (MDEP), described by a system of ordinary differential equations due to the complex relationship of the kinetics of chemical reactions, hydrodynamics and mass transfer in the electrolyte flow, the kinematics of electrode plates, and the influence of the electric field of the "anode-cathode" pair on all these processes. At the same time, the experimental base was a series of full-scale experiments to restore the seats of the root supports of cylinder blocks with electroplated coatings. The final result of the research is the procedure for constructing an optimal resource-saving mode of electroplating, which is a zinc-iron alloy.

Measuring change

2015 ◽  
Author(s):  
David L. Streiner ◽  
Geoffrey R. Norman ◽  
John Cairney
Keyword(s):  
Experimental Studies ◽  
Curve Analysis ◽  
Growth Curve Analysis ◽  
Clinical Assessments ◽  
Measuring Change ◽  
Quasi Experimental ◽  
Measure Change ◽  
Relationship Of ◽  
The Relationship ◽  
Methodological Difficulties

Although the goal of many clinical assessments and research studies is to measure how much people change between two occasions, the measurement of change is fraught with conceptual and methodological difficulties. One of the difficulties is that there are (at least) two different reasons to measure change: to determine if intervention had any effect, and to identify the correlates of change. These two goals work against each other, because the former requires there to be little difference in the amount of change among people in the same group, while the latter depends on inter-individual differences. The chapter also discusses various biases that exist when people are asked directly how much they think they have changed. This chapter addresses the issues of the relationship of change to the reliability of the scale, difficulties of measuring change in experimental and quasi-experimental studies, and new approaches to measuring change, such as growth curve analysis.

Nd7,33Ta8O28CI6 — ein Zwischenprodukt des thermischen Abbaus von Nd2Ta2O7Cl2: Präparation, Struktur und magnetische Eigenschaften / Nd7,33Ta8O28Cl6 — an Intermediate Product of the Thermal Decomposition of Nd2Ta2O7Cl2: Preparation, Crystal Structure and Magnetic Properties

1988 ◽  
Vol 43 (12) ◽  
pp. 1567-1574 ◽  
Author(s):  
U. Schaffrath ◽  
R. Gruehn
Keyword(s):  
Crystal Structure ◽  
Thermal Decomposition ◽  
Magnetic Properties ◽  
Calculated Data ◽  
Chemical Transport ◽  
Structure Type ◽  
Magnetic Susceptibilities ◽  
Relationship Of ◽  
The Relationship ◽  
Preparative Route

Abstract Single crystals of the new oxochlorotantalate Nd7.33Ta8O28Cl6, could be obtained only by chemical transport reactions (T2 → T1; T2 - 1000 °C, T, = 900 °C) with mixtures of Cl2/TaCl5 as transport agent. NdTaO4 was chosen as the starting material. A direct preparative route to Nd7.33Ta8O28Cl6 from binary and ternary components, however, was not successful. Nd7.33Ta8O28Cl6 , crystallizes in the space group Cmmm with a = 10.3381(8) Å, b = 18.865(1) Å, c - 3.9152(3) A; Z = 1. The structure was refined to R - 4.42%, R w = 2.76%. Main building units are pairs of edge-sharing TaO6 -octahedra which are connected with threefold capped trigonal prisms around Nd. Especially remarkable is one Nd position with an occupation factor of 0.833. The relationship of this new structure type with Nd2Ta2O7Cl2 is considered. Furthermore, we have measured the magnetic susceptibilities of both Nd-compounds in a temperature range from 3,6 to 251,3 K. The results are compared with calculated data.

scholarly journals Contact-deformation mechanism of boundary friction

2020 ◽  
Vol 164 ◽  
pp. 14004
Author(s):  
Alexandr Dykha ◽  
Volodymyr Kukhar ◽  
Viktor Artiukh ◽  
Maxim Aleksandrovskiy
Keyword(s):  
Experimental Studies ◽  
Deformation Mechanisms ◽  
Internal Stresses ◽  
Stress And Strain ◽  
Relative Deformation ◽  
Contact Deformation ◽  
Surface Layers ◽  
Friction Units ◽  
Relationship Of ◽  
The Relationship

Research was conducted to determine the effect of lubricants on stress and strain in the contact of metal surfaces. Experiments were carried out on the introduction of a fixed and moving indenter in contact with a dry and lubricated surface.The steel spherical specimen was pressed into a lubricated and dry metal surface. The microstructures of the structure of the surface layer are studied under various conditions of deformation. The diagrams of the relative deformation of the surface layers are constructed. The mechanism of the formation and distribution of internal stresses for dry and greased contact is described. Experimental studies of the introduction of a moving steel indenter into a lubricated surface have been carried out. The relationship of the deformation mechanisms of lubricated surfaces with their wear resistance is determined. The results obtained are recommended for predicting the durability of lubricated friction units according to the criterion of contact strength.

Relationship of the nanocrystal morphology and atomistic structure with respect to the superstructure ordering within PbS- and Gold-Mesocrystals

2014 ◽  
Vol 1705 ◽  
Author(s):  
Lydia Bahrig ◽  
Danny Haubold ◽  
Falk Röder ◽  
Stephen G. Hickey ◽  
Alexander Eychmüller
Keyword(s):  
Crystal Structure ◽  
Structure Formation ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Relationship Of ◽  
The Relationship ◽  
Atomistic Structure

ABSTRACTThe relationship between nanoparticle geometry and their two dimensional assembly is investigated in order to provide insights into the three dimensional arrangement of mesocrystals. The crystal structure of the nanoparticles and their homogeneity are investigated during structure formation on the mesoscale whereby effects such as fibrillation have been observed.

scholarly journals THE MOLECULAR MECHANISM OF LACTOFERRIN INFLUENCE ON BONE FORMATION

2016 ◽  
Vol 19 (3) ◽  
pp. 12-22
Author(s):  
P E Sadchikov ◽  
I L Goldman ◽  
S V Razin ◽  
A D Chernousov ◽  
L I Alekseeva ◽  
...  
Keyword(s):  
Bone Formation ◽  
Postmenopausal Osteoporosis ◽  
Critical Review ◽  
Clinical Studies ◽  
Bone Matrix ◽  
Experimental Studies ◽  
Proliferation And Differentiation ◽  
Specific Receptors ◽  
Relationship Of ◽  
The Relationship

In present critical review of systematized materials on the breakthrough achievements of the last decade - the discovery of the effect of protein lactoferrin (LF) on bone formation. It is shownthat LF increases the number of osteoblasts, stimulate their proliferation and differentiation, and prevents their destruction. Action of LF exceeds that of many other previously established bone-forming factors. LF increases the ability of osteoblasts to synthesize and mineralize bone matrix. Apparently, the effect of LF on bone anabolism ensured by the presence of specific receptors on osteoblasts. It was found that LF also inhibits the formation of osteoclasts. Experimental studies have demonstrated that LF prevents the destruction of bone tissue in ovariectomizedanimals and, thus, developing the type of postmenstrual osteoporosis in women. We get the first clinical studies demonstrating an increase in the period of healing of bone injuries while reducing the level of endogenous LF. Since molecular research establishes that the expression of the LF gene is regulated by estrogen, which reduces the development of postmenopausal osteoporosis (PMO) in women, there is a need to further investigate the relationship of these processes, which will help to create a basis for the management of bone formation.

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