Jordan Zivanovic

Goce Delcev University · Mining and Geology

To improve kinetic flotation models, many first-order flotation kinetics models with distributions of flotation rate constants were redefined so that they could all be represented by the same set of three model parameters. As a result, the width of the distribution become independent of its mean, and parameters of the model and the curve fitting er...

The refractory or low grade lead/zinc domestic ores in Republic of Macedonia are investigated by conventional separation technology or flotation separation. In the mean time, investigations are directed to the new possibilities of leaching by microorganisms – bioleaching. The paper is result of these technologies and investigations carried out for...

To improve kinetic flotation models, many first-order flotation kinetics models with distributions of flotation rate constants were redefined so that they could all be represented by the same set of three model parameters. As a result, the width of the distribution become independent of its mean, and parameters of the model and the curve fitting er...

The improvement in the chalcopyrite copper Bucim mine are gone forward to renewed reagent regime, including and involving new reagents for increase d recovery of copper and gold. The optimization and mathematical linear models using gradient method Box and Wilson are good example for improvement of industrial recoveries in flotation circuit. In thi...

During the period from January to December 1999 year and 2000, 2007 and 2008 field research has been made at 20 measuring points on the river Bregalnica together with its tributaries. The research made during these year on the territory of East Macedonia had an aim to establish the degree of water pollution in the river Bregalnica with its tributar...

Soil cultures of peppers were (Capsicum annuum L.) cultivated. The first leaves of young plants in the stage of forming were treated with excessive concentrations of ZnSO 4 —7H 2 O in four different concentrations (mg/kg): 1.0; 5.0; 10.0 and 20.0 while the control group of plants was treated with water only. Parallel to this, a part of the plants w...

Analysis of the natural environment as a source for understanding and creation of environmental awareness and consciousness among children of pre-school and early school age, as well as methods for the formation of ecological culture among children in particular especially should be emphasized the application of the same educational process because...

Computer science education, information and communication technology (ICT) are at present becoming one of the most important elements defining the basic competences students. Information technlology integrates medial, informative and computer, but also all the educational subjects mentioned in the curriculum basis of general education. In "Based na...

Soil cultures of peppers were (Capsicum annuum L.) cultivated. The first leaves of youngplants in the stage of forming were treated with excessive concentrations of ZnSO4—7H2O in fourdifferent concentrations (mg/kg): 1.0; 5.0; 10.0 and 20.0 while the control group of plants was treatedwith water only. Parallel to this, a part of the plants were tre...

Ще формулираме теоремата на Островски-Канторович за сходимост на метода на Нютон (известен още като метод на допирателните) и ще дадем едно ново доказателство на същата. Тази теорема налага, че итерационния метод на Нютон се поставя като всеопща система от уравнения, приближаване до решение , кото е близко до някоя дадена точка . Ще докажем и една...

During the period from January 1999 to December 2000 field research has been made at 20 measuring points on the river Bregalnica together with its tributaries. The content of the heavy metals (Pb, Zn and Cd) has been determined in water. In the first year of research the material for analysis was taken once a month during the year (from January to...

This paper examines the influence of the geomagnetic field on the living world and in particular, its effects on health. The paper also presents the causes of magnetic storms analyses of their impacts and calculation, and interpretation of the K-index

During the year 2000 we have researched the terrain around the river basin of the river Bregalnica. This paper contains the results of this research from four measuring points, one of which is the control measuring point Blatec on the river Osojnica. The content of some heavy metals (Pb, Cd, Zn, and Mn) has been analyzed in ambiental water (filtera...

The paper presents the results obtained during the investigations carried out for the availability of selenium and trace elements (N i, Cd, Cr, B) to the soils of the Tikves region. Examination by ICP-AES method were carried out on fifty samples taken in the vicinity of the villages of Begniste, Resava, Vozarci, Drenovo, Sirkovo, Manastirec, Sivec,...

Lead has the key part in relation to intoxication by heavy metals. The aim of this determination of correlation between the level of delta-aminolevulinic acid in urine and some other parameters with workers professionally expose to the influence of lead in different parts of the factory producing batteries "Zletovo" in Probistip. The material being...