Various characteristic features of the1H NMR spectra of solutions of diethyl sulfoxide

1984 ◽  
Vol 25 (3) ◽  
pp. 475-478
Author(s):  
Sh. A. Markaryan ◽  
V. S. Davtyan ◽  
N. M. Beileryan
Keyword(s):  
Nmr Spectra ◽  
Diethyl Sulfoxide ◽  
Characteristic Features

Darstellung und 11B-NMR-Spektren perhalogenierter closo-Hexaborate Β6ΧnY6-n2-, n=0-6; X ≠ Y= Cl, Br, I / Preparation and 11B NMR Spectra of the Perhalogenated closo-Hexaborates B6XnY6-n2-,n = 0-6; Χ ≠ Υ = Cl, Br, I

1990 ◽  
Vol 45 (8) ◽  
pp. 1113-1117 ◽  
Author(s):  
W. Preetz ◽  
M. Stallbaum
Keyword(s):  
Chemical Shift ◽  
Alkaline Solution ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Point Symmetry ◽  
Aqueous Alkaline Solution ◽  
11B Nmr ◽  
Characteristic Features ◽  
First Time

The mixed halogenohexaborates B6XnY6-n2-, n = 1-5; Χ ≠ Υ = Cl, Br, I, including most of the pure stereoisomers for n = 2—4, are prepared for the first time by treatment of the halohydrohexaborates B6XnH6-n2-, X = Cl, Br in aqueous alkaline solution with bromine and iodine or with halogenosuccinimides. The point symmetry is determined from the "B NMR spectra, which show characteristic features for homologous isostructural compounds. In the systems B6XnY6-n2- a considerable dispersion of the 11B signals is observed, for B(X) atoms to lower, for B(Y) atoms to higher field compared with B6X62- and B6Y62- (electronegativity X > Y), respectively. An additional chemical shift is caused by the mutual antipodal effect between pairs of opposite B atoms carrying different substituents. From the systematic influences on the chemical shifts the 11B NMR spectra of the missing species fac-B6X3Y32- are calculated.

closo-Halogenohydrohexaborate, II 11B-NMR-Spektren der closo-Halogenohydrohexaborate XnB6H6-n2-, n = 0-6; X = Cl, Br, I / closo-Halogenohydrohexaborate, II 11B NMR Spectra of the closo-Halogenohydrohexaborates XnB6H6-n2-, n = 0-6; X = Cl, Br, I

1987 ◽  
Vol 42 (3) ◽  
pp. 287-292 ◽  
Author(s):  
J. Fritze ◽  
W. Preetz ◽  
H. C. Marsmann
Keyword(s):  
Nmr Spectra ◽  
Chemical Shifts ◽  
Heavy Atom ◽  
Heavy Atom Effect ◽  
H Nmr ◽  
Complete Series ◽  
11B Nmr ◽  
Characteristic Features ◽  
Atom Effect

The point symmetries of the halogenohydrohexaborates within the nearly complete series XnB6H6-n2-, X = Cl, Br, I; n = 1-5, are determined from the 11B and 11B{1H} NMR spectra, which show characteristic features for homologous isostructural compounds related to the electronegativity of the substituents. The chemical shifts are mainly influenced by -I, +M, and in the case of X = I by the heavy atom effect. Along with a strong antipodal effect a slight vicinal influence between neighbours in the B6 cage is observed, increasing with the number of substituted atoms

Ultrastructural modification of cellular interactions in cancer tumor

1978 ◽  
Vol 36 (2) ◽  
pp. 318-319
Author(s):  
N. P. Dmitrieva
Keyword(s):  
Cancer Cells ◽  
Human Thyroid ◽  
Adjacent Cell ◽  
Main Role ◽  
Cellular Interactions ◽  
Electron Microscopic ◽  
Cancer Tumor ◽  
Normal Human ◽  
Characteristic Features

One of the most characteristic features of cancer cells is their ability to metastasia. It is suggested that the modifications of the structure and properties of cancer cells surfaces play the main role in this process. The present work was aimed at finding out what ultrastructural features apear in tumor in vivo which removal of individual cancer cells from the cell population can provide. For this purpose the cellular interactions in the normal human thyroid and cancer tumor of this gland electron microscopic were studied. The tissues were fixed in osmium tetroxide and were embedded in Araldite-Epon.In normal human thyroid the most common type of intercellular contacts was represented by simple junction formed by the parallelalignment of adjacent cell membranees leaving in between an intermembranes space 15-20 nm filled with electronlucid material (Fig. 1a). Sometimes in the basal part of cells dilatations of the intercellular space 40-50 nm wide were found (Fig. 1a). Here the cell surfaces may form single short microvilli.

Development of 200kV ultrahigh-resolution analytical electron microscope

1989 ◽  
Vol 47 ◽  
pp. 108-109
Author(s):  
T. Kaneyama ◽  
M. Naruse ◽  
Y. Ishida ◽  
M. Kersker
Keyword(s):  
Electron Microscope ◽  
Optical Constants ◽  
Materials Science ◽  
Objective Lens ◽  
The Finite Element Method ◽  
Ultrahigh Resolution ◽  
Analytical Electron ◽  
Analytical Electron Microscope ◽  
Characteristic Features ◽  
Better Than

In the field of materials science, the importance of the ultrahigh resolution analytical electron microscope (UHRAEM) is increasing. A new UHRAEM which provides a resolution of better than 0.2 nm and allows analysis of a few nm areas has been developed. [Fig. 1 shows the external view] The followings are some characteristic features of the UHRAEM.Objective lens (OL)Two types of OL polepieces (URP for ±10' specimen tilt and ARP for ±30' tilt) have been developed. The optical constants shown in the table on the next page are figures calculated by the finite element method. However, Cs was experimentally confirmed by two methods (namely, Beam Tilt method and Krivanek method) as 0.45 ∼ 0.50 mm for URP and as 0.9 ∼ 1.0 mm for ARP, respectively. Fig. 2 shows an optical diffractogram obtained from a micrograph of amorphous carbon with URP under the Scherzer defocus condition. It demonstrates a resolution of 0.19 nm and a Cs smaller than 0.5 mm.

NMR spectra and relaxation in incommensurate systems in the presence of a devil's staircase

1985 ◽  
Vol 46 (7) ◽  
pp. 1205-1209 ◽  
Author(s):  
R. Blinc ◽  
S. Žumer ◽  
D.C. Ailion ◽  
J. Nicponski
Keyword(s):  
Nmr Spectra ◽  
Devil's Staircase ◽  
Devil’S Staircase

Tolerance is theoretical and practical principles

1996 ◽  
pp. 13-23
Author(s):  
Mykhailo Babiy
Keyword(s):  
Religious Diversity ◽  
The Other ◽  
Nodal Points ◽  
Characteristic Features ◽  
The One ◽  
Ukrainian Society

Political ideological pluralism, religious diversity are characteristic features of modern Ukrainian society. On the one hand, multiculturalism, socio-political, religious differentiation of the latter appear as important characteristics of its democracy, as a practical expression of freedom, on the other - as a factor that led to the deconsocialization of society, gave rise to "nodal points" of tension, confrontational processes, in particular, in political and religious spheres.

Hard and light gamification in education: Which one to choose?

2020 ◽  
Vol 1 (1) ◽  
pp. 20-27
Author(s):  
E. V. Karmanova ◽  
V. A. Shelemetyeva
Keyword(s):  
Computer Games ◽  
Educational Process ◽  
Course Development ◽  
Learning Technology ◽  
Training Course ◽  
Resource Requirements ◽  
E Learning ◽  
Characteristic Features ◽  
Game Elements

The article is devoted to the implementation of gamification methods in the educational process. The characteristic features of light and hard gamification are presented. The appropriateness of using gamification when applying e-learning technology is considered. Classification of courses based on hard gamification taking into account the technological features of development is proposed: courses-presentations, courses — computer games, VR/AR courses. The article also illustrates the use of various game elements of easy gamification using the example of the module “Level up! — Gamification” of the Moodle LMS. The capabilities of this module can be used in an electronic course by any teacher who has the skills of working with the Moodle.The authors present the analysis of the development of a training course in sales techniques using hard and light gamification technologies, where the course development was assessed for its complexity, manufacturability, and resource requirements. The results of the analysis showed that the development of courses using hard gamification requires much more financial and time-consuming than the development of courses using light gamification.The article evaluates the results of the educational intensiveness intense “Island 10–22”, held in July 2019 in Skolkovo, in which 100 university teams, teams of research and educational centers, teams of schoolchildren — winners of competitions, olympiads, hackathons (“Young Talents”) participated. The results of the intense confirmed the effectiveness of the use of light gamification methods in adult training. Thus, the conclusions presented in the article reveal a number of advantages that light gamification has in comparison with hard gamification.

Budget as an Instrument of Reproduction of Bureaucracy in Russia

2006 ◽  
pp. 87-96
Author(s):  
Yu. Shvetsov
Keyword(s):  
The State ◽  
Economic Consequences ◽  
Material Base ◽  
Characteristic Features

The article considers the problem of bureaucratisation of the state and the most important social and economic consequences of this phenomenon. The essence of bureaucracy has been revealed, characteristic features of its functioning in Russia have been analyzed; the material base of bureaucracy and its dominating status in the society have been substantiated. The conclusion has been made that the process of changing the role of the budget to serve the interests of bureaucracy is being accomplished.

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