X-ray photoelectron and ion scattering spectroscopic surface analyses of amorphous and crystalline calcium phosphate nanoparticles with different chemical histories

2020 ◽  
Vol 22 (10) ◽  
pp. 5531-5547 ◽  
Author(s):  
Vuk Uskoković
Keyword(s):  
Calcium Phosphate ◽  
Atomic Layer ◽  
Hydroxyapatite Nanoparticles ◽  
Ion Scattering ◽  
Amorphous Precursor ◽  
X Ray ◽  
History Of ◽  
Calcium Phosphate Nanoparticles ◽  
History Of Formation

The surface of hydroxyapatite nanoparticles is enriched in the topmost atomic layer with calcium and depleted of it elsewhere, alongside being dependent on the history of formation of hydroxyapatite from the amorphous precursor.

Fundamentals of X-ray Spectrometric Analysis Using Low-Energy Electron Excitation

1990 ◽  
Vol 34 ◽  
pp. 105-121 ◽  
Author(s):  
K. J. Romand ◽  
F. Gaillard ◽  
M. Charbonnier ◽  
D. S. Urch
Keyword(s):  
Analytical Techniques ◽  
Atomic Layer ◽  
Mean Free Path ◽  
Electron Excitation ◽  
Spectrometric Analysis ◽  
Ion Scattering ◽  
X Ray ◽  
Secondary Ions ◽  
Information Depth ◽  
Wide Range

In the field of material analysis and characterization interest has considerably shifted over the last few decades from bulk to surface and very thin film problems. At the present state a wide range of surface analytical techniques - such as x-ray photoelectron (XPS), Auger electron (AES), secondary ion mass (SIMS), ion scattering (ISS) spectroscopies - have become available but every one of them exhibits specific analytical features and information content. Within the context of this paper the main parameter to be considered is the information depth i.e the layer thickness from which the majority of information-bearing particles escape and hence are detected. For XPS and AES, this parameter is associated with the mean-free path of photoelectrans or Auger electrons and typically is in the range from 0.5 to 4 nm. In SIMS the ejected secondary ions are emitted from the outer 2 or 3 atomic layers (i.e. from about 1 nm) while the single-collision binary process occuring in ISS is restricted to atoms from the top most atomic layer (0.2-0.3 nm).

scholarly journals Mechanism of formation governs the mechanism of release of antibiotics from calcium phosphate nanopowders and cements in a drug-dependent manner

2019 ◽  
Vol 7 (25) ◽  
pp. 3982-3992 ◽  
Author(s):  
Vuk Uskoković
Keyword(s):  
Calcium Phosphate ◽  
Release Mechanism ◽  
Dependent Manner ◽  
Mechanism Of Formation ◽  
History Of ◽  
Drug Dependent ◽  
History Of Formation

History of formation of the carrier affects the release mechanism, which is drastically dependent on the identity of the drug.

scholarly journals 90th anniversary of the Department of Radiation Diagnostics of Kazan State Medical Academy of postdegree education

2017 ◽  
Vol 98 (1) ◽  
pp. 144-148
Author(s):  
M K Mihaylov
Keyword(s):  
Assistant Professor ◽  
X Ray ◽  
Research Activities ◽  
Medical Academy ◽  
90Th Anniversary ◽  
Highly Skilled ◽  
History Of ◽  
State Medical Academy ◽  
History Of Formation

The history of formation of the Department of radiation diagnostics in Kazan state medical academy is tightly connected with the history of roentgenology in Kazan. The Department of radiation diagnostics celebrates its 90th anniversary being deeply and successfully involved in training of highly-skilled specialists - radiation diagnosticians - and in research activities. In 1920 in Kazan the Institute for Doctor’s Improvement was organized (nowadays it is named Kazan state medical academy). The Board of the Institute decided to organize laboratories and X-ray unit on the basis of therapeutic clinic. The first study was conducted by the rector himself, professor A.R. Lurija. In 1927 assistant professor R.Ja. Gasul’, professor M.I. Nemenov’s apprentice, invited from Leningrad was elected as the Head of the Department. During the last few years professors E.F. Rottermel’, D.E. Gol’dshtejn, M.H. Fajzullin were Heads of the Department and since 1982 till present professor M.K. Mikhajlov has been the Head of the Department of radiation diagnostics.

Lingual Dystonia Treated with Botulinum Toxin - A Case Report

1970 ◽  
Vol 24 (2) ◽  
pp. 75-78
Author(s):  
MA Hayee ◽  
QD Mohammad ◽  
H Rahman ◽  
M Hakim ◽  
SM Kibria
Keyword(s):  
Botulinum Toxin ◽  
Botulinum Toxin A ◽  
Botulinum Toxin Type A ◽  
Botulinum Toxin Type ◽  
X Ray ◽  
Medical College ◽  
Lingual Dystonia ◽  
History Of ◽  
Chest X Ray

A 42-year-old female presented in Neurology Department of Sir Salimullah Medical College with gradually worsening difficulty in talking and eating for the last four months. Examination revealed dystonic tongue, macerated lips due to continuous drooling of saliva and aspirated lungs. She had no history of taking antiparkinsonian, neuroleptics or any other drugs causing dystonia. Chest X-ray revealed aspiration pneumonia corrected later by antibiotics. She was treated with botulinum toxin type-A. Twenty units of toxin was injected in six sites of the tongue. The dystonic tongue became normal by 24 hours. Subsequent 16 weeks follow up showed very good result and the patient now can talk and eat normally. (J Bangladesh Coll Phys Surg 2006; 24: 75-78)

Highlights in the history of X-ray topography1

1995 ◽  
Vol 210 (6) ◽  
Author(s):  
A. R. Lang
Keyword(s):  
Magnetic Domain ◽  
Diffraction Theory ◽  
Dislocation Loops ◽  
X Ray Diffraction ◽  
X Ray ◽  
Domain Structures ◽  
Structure Factors ◽  
History Of ◽  
Dislocation Sources ◽  
Non Destructive

AbstractX-ray topography provides a non-destructive method of mapping point-by-point variations in orientation and reflecting power within crystals. The discovery, made by several workers independently, that in nearly perfect crystals it was possible to detect individual dislocations by X-ray diffraction contrast started an epoch of rapid exploitation of X-ray topography as a new, general method for assessing crystal perfection. Another discovery, that of X-ray Pendellösung, led to important theoretical developments in X-ray diffraction theory and to a new and precise method for measuring structure factors on an absolute scale. Other highlights picked out for mention are studies of Frank-Read dislocation sources, the discovery of long dislocation helices and lines of coaxial dislocation loops in aluminium, of internal magnetic domain structures in Fe-3 wt.% Si, and of stacking faults in silicon and natural diamonds.

ANCIENT VALLEYS IN THE WEST PRIBAIKALYE (HISTORY OF FORMATION)

2015 ◽  
pp. 91 ◽  
Author(s):  
V. D. Mats ◽  
I. M. Yefimova ◽  
A. A. Kulchitskii
Keyword(s):  
The West ◽  
History Of ◽  
History Of Formation

Formation and Development of the Pre-Professional Training System of Foreign Medical Applicants in Ukraine (Historical and Educational Aspect)

2014 ◽  
Vol 4 (3) ◽  
pp. 95-98
Author(s):  
Iana Proskurkina
Keyword(s):  
Foreign Students ◽  
Professional Training ◽  
Training System ◽  
Further Education ◽  
Effective System ◽  
History Of ◽  
Set Up ◽  
The University ◽  
History Of Formation ◽  
Educational Aspect

Abstract The growing number of foreign applicants looking forward to getting education in Ukrainian medical universities makes us find the ways how to improve and make effective the pre-professional training system of foreign medical applicants for further education. The article deals with the issues of the history of formation and development of the preprofessional training system of foreign medical applicants in Ukraine. On the ground of the electronic databases of the official websites of higher educational establishments, the data on years of opening first offices of the dean, departments and preparatory faculties for foreign medical applicants in Ukrainian medical universities are analyzed and systematized. Also the data on the setting up preparatory faculties at other universities who carry out licensed training of foreign students of the medical profile are presented. The data on the operating and management of such institutions in the system of the University administration are generalized. It’s revealed that during the years of its functioning the pre-professional training has changed, in particular the system was commercialized and the institutions involved in training foreign applicants have been reorganized. The modern trends in teaching foreign medical students at the preparatory faculties of the Ukrainian medical universities are displayed. Based on the analysis of the data it is concluded that the system of the pre-professional training of foreign medical applicants was set up in the 50s-60s years of the twentieth century. During this time, some positive experience in the preparation of future international medical specialists has been gained. The system of the pre-professional training of foreign medical applicants has been comprehensively improved and an effective system of managing foreign medical applicants has been created.

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