A Polarographic Study of the Monocarboxylato Complexes of Lead

The formation of monocarboxylato complexes of lead has been investigated by polarographic method in aqueous solutions containing excess of sodium formate, acetate, propionate, butyrate, n - valerate, iso-valerate, monochloracetate, and glycollate, respectively. The concentrations of monocarboxylate ions have been ranged from 0 to 3M. To avoid the hydrolysis of monocarboxylato complexes, the solutions contained a constant concentration (2 M) of the corresponding monocarboxylic acid, and, in the case of less soluble valeric acids, 200/o of free acid

Polarographic Determination of Stability Constants of Glycolato and Chloroacetato Complexes of Copper, Zinc, Cadmium and Lead

By measuring the half-wave potentials of metal ions in buffer solutions of glycolic and chloroacetic acid the limit concentrations of these acids in the buffer were determined, at which no hydrolysis of metal glycolato and chloroacetato complexes takes place. Furthermore, stability constants of glycofato and chloroacetato complexes of copper, zinc, cadmium and lead were determined under such conditions

On multicurve models for the term structure

In the context of multi-curve modeling we consider a two-curve setup, with one curve for discounting (OIS swap curve) and one for generating future cash flows (LIBOR for a give tenor). Within this context we present an approach for the clean-valuation pricing of FRAs and CAPs (linear and nonlinear derivatives) with one of the main goals being also that of exhibiting an "adjustment factor" when passing from the one-curve to the two-curve setting. The model itself corresponds to short rate modeling where the short rate and a short rate spread are driven by affine factors; this allows for correlation between short rate and short rate spread as well as to exploit the convenient affine structure methodology. We briefly comment also on the calibration of the model parameters, including the correlation factor.Comment: 16 page

Evaluation of Pyrocondensates as a Polymerization Raw Material

Two pyrocondensate samples were examined in order to evaluate them as polymerization raw materials. The components were identified or undoubtedly characterized by means of mass spectral data taken by GC-MS and by gas chromatography retention data. Quantitative analysis of pyrocondensates and the residues which remained after cationic, thermal or free radical polymerizations was made by high resolution gas chromatography, Pyrocondensates contained mainly alkyl and alkenyl substituted benzenes and fused ring compounds. In one sample bicyclic components, with cyelopentadiene and cyclohexadiene as constitutive bases, were found. As the samples contained a fairly high portion of components able to polymerize, they were found to be of interest for polymerization into resins. Polimerization yields of the whole sample and of a single reactive component depended on the type of polymerization. Cationic polymerization gave the highest and polymerization by peroxides the lowest polymerization yield in the whole sample. Alkenylbenzenes and indenes reacted in the cationic polymerization better than in the other two kinds of polymerization, while bicyeles gave the best yield in the polymerization of thermal type

Competence and Behavioral/Emotional Problems in Croatian Children – Parents\u27 and Teachers\u27 Reports: Pilot Study

Achenbach\u27s Child Behavior Checklist (CBCL) and Teacher\u27s Report Form (TRF) were administered to school children aged between 7–11 comprising a non-referred sample (n = 349) drawn from the whole country. Those were the first data on the CBCL and TRF in Croatia. Both in the CBCL and TRF boys had higher scores compared to girls in the Externalizing and Total Problems scale (p<0.01 and p<0.05). Parents rated higher scores to the Internalizing and Externalizing scales and the Total Problems scale in both sexes (p<0.01 and p<0.05), with the exception of the Internalizing scale in boys. Parents are very important observers of mental health problems in children

Promena strukture setve u funkciji unapređenja konkurentnosti porodičnih gazdinstava usmerenih na finalnu proizvodnju utovljene junadi

The aim of this paper is to examine the impact of sowing structure on family farm competiveness using the model of family farm directed at the final production of fattened beef cattle in the conditions of unchanged estate size. Applying a partial budget analysis, it was examined whether the decision on buying alfalfa hay or mercantile maize on the market and changing the sowing structure was economically justified and under what conditions using additional procedure of sensitive analysis. Applying this approach, it was investigated to what extent that decision contributed to improving the family farm profitability. The results of the conducted research show that the decision on buying mercantile maize mainly contributes to improving competitiveness of family farms directed at the final production of fattened beef cattle compared with the decision on buying alfalfa hay. It is the consequence of the fact that buying mercantile maize on the market will enable sowing structure changes, that is, buying mercantile maize will make the area free, which according to some conservative estimations, can be used for the production of sufficient amounts of alfalfa and silage maize for fattening of additional 19 head, whereas buying alfalfa hay will make the area free, which can be used for production of sufficient amounts of mercantile and silage maize for fattening of additional 6 head. In addition, it is shown that more rational way of organizing family farms directed at the final production of fattened beef cattle can additionally use available land resources and in that way increase profitability and improve competitiveness.Cilj ovog rada je da se u uslovima nepromenjene veličine poseda na modelu porodičnog gazdinstva usmerenog na finalnu proizvodnju utovljene junadi ispita uticaj promene strukture setve na konkurentnost porodičnog gazdinstva. Primenom diferencijalne kalkulacije ispitano je da li je odluka o kupovini sena lucerke ili merkantilnog kukuruza i promeni strukture setve ekonomski opravdana, a dodatnim postupkom senzitivne analize i pod kojim uslovima. Primenjujući ovakav pristup utvrđeno je u kojoj meri ova odluka utiče na konkurentnost gazdinstva. Rezultati sprovedenog istraživanja pokazuju da odluka o kupovini merkantilnog kukuruza u većoj meri doprinosi unapređenju konkurentnosti porodičnih gazdinstava usmerenih na finalnu proizvodnju utovljenih junadi u odnosu na odluku o kupovini sena lucerke. To je posledica činjenice da kupovina merkantilnog kukuruza na tržištu omogućava promene u strukturi setve tj. da se kupovinom merkantilnog kukuruza oslobađa površina na kojoj je prema nekim konzervativnim procenama moguće proizvesti dovoljno lucerke i silažnog kukuruza za tov dodatnih 19 grla, dok se kupovinom sena lucerke oslobođa površina na kojoj je moguće proizvesti dovoljno merkantilnog i silažnog kukuruza za tov dodatnih 6 grla. S tim u vezi, pokazano je da uz racionalniji način organizovanja porodična gazdinstva usmerena na finalnu proizvodnju utovljene junadi mogu dodatno iskoristiti raspoložive zemljišne resurse i na taj način poboljšati profitabilnost i unaprediti konkurentnost

Acceleration of Image Segmentation Algorithm for (Breast) Mammogram Images Using High-Performance Reconfigurable Dataflow Computers

Image segmentation is one of the most common procedures in medical imaging applications. It is also a very important task in breast cancer detection. Breast cancer detection procedure based on mammography can be divided into several stages. The first stage is the extraction of the region of interest from a breast image, followed by the identification of suspicious mass regions, their classification, and comparison with the existing image database. It is often the case that already existing image databases have large sets of data whose processing requires a lot of time, and thus the acceleration of each of the processing stages in breast cancer detection is a very important issue. In this paper, the implementation of the already existing algorithm for region-of-interest based image segmentation for mammogram images on High-Performance Reconfigurable Dataflow Computers (HPRDCs) is proposed. As a dataflow engine (DFE) of such HPRDC, Maxeler's acceleration card is used. The experiments for examining the acceleration of that algorithm on the Reconfigurable Dataflow Computers (RDCs) are performed with two types of mammogram images with different resolutions. There were, also, several DFE configurations and each of them gave a different acceleration value of algorithm execution. Those acceleration values are presented and experimental results showed good acceleration

Polarographic Investigations of Some Metal Monocarboxylato Complexes . I. Monocarboxylato Complexes of Lead

By the polarographic method of DeFord and Hume the stability constants of plumbous monocarboxylato co mplexes have been determined, in water solutions of a constant ionic s trength 2 and a con stant concentration of 2 M of monocarboxylic acid. The examinations were carried out in the monocarboxyla te concent r a t ion range up to 2 M. The following values of stability const a nts were obtained: formiato complexes /31= 13, /32 = 50, /33 = 30; acetato complexes /31 = 150 , /32 = 900, fJ3 = 3000; propionato complexes fJ 1 = 170, /J2 = 2200, /J3 = 5800 ; butyrato complexes /J 1 = 120 , /32 = 2000 , /3 3 = = 5800. It i s evident that with the increase of b ase strength and the size of the monoc arboxylate ion the complex stability increas es in the m\u27ljority of cases