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Приказ резултата 11-20 од 179
Synthesis of Zinc Doped Phosphate Tungsten Bronzes and its Redox Activity in Aqueous Solution of LiNO3
Phosphate tungsten bronzes (WPB) have been intensively investigated for many applications due to their interesting chemical, optical, electrical, and mechanical properties. Their most known usages are as a pigment in ...
PHYSICOCHEMICAL INVESTIGATION Zn DOPED PWB
Polyoxometalates (POMs), although having more than a hundred years of history, continue to
attract the attention of researchers as catalysts, solid superionic proton conductors at room
temperatures, applicable in different ...
PHYSICAL-CHEMICAL CHARACTERIZATION OF PHOSPHATETUNGSTEN BRONZE DOPED WITH IRON FROM HETEROPOLY SALTS AS PRECURSORS
Heteropolyacids, with a general formula ofH3+xAM12O40∙nH2O (x=0-1; A=P,
Si, B, As, Ge;M=Mo, W; n=30-6) are of special interest as newmaterials because
of their high conductivities. Among them special attention deserves ...
TOXIC METALS IN SOIL SAMPLES NEAR SOURCE OF POLLUTION WITH ECOLOGICAL RISK IN NORTHERN KOSOVO AND METOHIJA
The term toxic metals means heavy and light metals. Higher toxicity of heavy metals compared to light ones was stated, while many light metals belong to physiological and oligo-elements. The term heavy metals means metals ...
Sadržaj i distribucija teških metala u reci Ibar tokom poplava i izlivanja jalovišta
This paper examines the impact of high flood magnitude on heavy metal pollution in the Ibar River, northern Kosovo and Metohija. The area of analysis is one of the most important industrial regions of Pb / Zn in Europe. ...
The Role Of Analytical Chemistry Of Metal Ions In Monitoring The Quality Of The Environment
There is no doubt analytical laboratories have an essential role to play in
environmental protection through monitoring of pollutants in air, water or soil.
Research on trace elements and the effects of their ingestion ...
Preparation and characterization of phosphatetungsten bronze doped with iron from heteropoly salts as precursors
Heteropolies of acids and salts heteropolises of acids can also be used as starting materials for the production of tungsten bronzes. These bronzes have a specific structure that results from the collapse of the Kegin anion ...
CURVES ON RULED SURFACES UNDER INFINITESIMAL BENDING
(Faculty of Sciences and Mathematics, University of Priština in Kosovska Mitrovica, Republic of Serbia., 2021-01-01)
Infinitesimal bending of curves lying with a given precision on ruled surfaces in 3-dimensional Euclidean space is studied. In particular, the bending of curves on the cylinder, the hyperbolic paraboloid and the helicoid ...
Analysis of geodesics on different surfaces
It is widely known that some surfaces contain special curves as a geodesics, while a lots of geodesics on surface have complicated shapes. Goal of this research is to find on what surfaces are u- and v- parameter curves ...
Some new identities for the second covariant derivative of the curvature tensor
In this paper, we have studied the second covariant derivative of Riemannian curvature tensor. Some new identities for the second covariant derivative have been given. Namely, identities obtained by cyclic sum with respect ...