Претраживање
Приказ резултата 21-30 од 180
Linear Free-Energy Relationships Applied to the C-13 NMR Chemical Shifts in 4-Substituted N-[1-(Pyridine-3-and-4-yl)ethylidene]anilines
(Wiley-Blackwell, Hoboken, 2014)
Two series of 4-substituted N-[1-(pyridine-3- and -4-yl)ethylidene]anilines have been synthesized using different methods of conventional and microwave-assisted synthesis, and linear free-energy relationships have been ...
Use of up-flow percolation test to assess the environmental properties of raw and treated fly ash
(Gheorghe Asachi Technical University of Iasi, Romania, 2019)
Fly ash (FA) is a by-product created from the burning of coal in thermal power plants. FA mainly consists of mineral compounds that make them naturally caustic. Despite this, research has shown that FA may be utilized as ...
Structure analysis of geopolymers synthesized from clay originated from Serbia
(Springer, New York, 2017)
The paper presents chemical and structural analysis of geopolymer materials which are obtained by alkali-activated calcined clay (metakaolin) originated from Serbia under strictly defined conditions. Characterization of ...
Use of spent brewer's yeast in L-(+) lactic acid fermentation
(Inst Brewing, London, 2019)
The application of by-products from the brewing industry in lactic acid (LA) production was investigated in order to replace expensive nitrogen sources (such as yeast extract) with cheaper and renewable nitrogenous materials ...
Ad-hoc intercomparison of four different radon exhalation measurement methods
(Oxford Univ Press, Oxford, 2018)
It is indicated that the exposure to radon originating from the building materials is not negligible and the radon exhalation measurement should get more attention in the future. The experience with four different methods ...
Forecasting of Greenhouse Gas Emissions in Serbia Using Artificial Neural Networks
(Taylor & Francis Inc, Philadelphia, 2013)
Serbia is attempting to synchronize its development with the basic assumptions of sustainable development and, consequently, data about environmental impact are necessary. The main goal of this study was to investigate and ...
Dependence of Structural Characteristics of Polyamide Textured Yarns on the Parameters of the False Twist Yarn Texturing Process
(Inst Chemical Fibres, Lodz, 2017)
In the false twist texturing process, due to the action of mechanical forces and heat, a disorientation of structural elements happens at all levels of the supramolecular structure. These changes are related to changes in ...
Removal of Mg from spring water using natural clinoptilolite
(Mineralogical Soc, Twickenham, 2012)
Natural zeolitic tuff from Brus (Serbia) consisting mostly of clinoptilolite (about 90%) has been investigated for the reduction of the Mg concentration in spring water. The sorption capacity of the zeolite is relatively ...
Phase rigidity of point interactions
(World Scientific Publ Co Pte Ltd, Singapore, 2013)
In this paper, we investigate phase rigidity of one-dimensional point interactions. With the aid of supersymmetric quantum mechanics (SUSYQM) we generate family of isospectral potentials describing point interactions. We ...
Spectroscopy study of Bi12GeO20 single crystals
(Natl Inst Optoelectronics, Bucharest-Magurele, 2013)
In this work single crystals of bismuth germanium oxide (Bi12GeO20) have been grown by the Czochralski method. Growth conditions were studied. The critical diameter and the critical rate of rotation were calculated. Suitable ...