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41.
Kinetic studies of catalytic ozonation of atrazine
Brigita Tepuš, Marjana Simonič, 2008, original scientific article

Abstract: The aim of our work was to degrade atrazine by the ozone treatment of both a model and the original drinking water samples, using Pt-catalyst, and to evaluate the performance of this catalyst. The rate constant for the reaction of atrazine with ozone was determined in the model water sample. The activation energies and the reaction orders of ozone decomposition were determined in both the model and the drinking water samples. Ozone treatment using Pt-catalyst has some influence on the loss of atrazine in the sources of drinking water. The concentration of some metabolites in the model and drinking water was observed during ozone treatment. The toxicity of atrazine to crustacean Daphnia magna in the original drinking water and in the ozone treated water samples was also assessed.
Keywords: ozone, Pt-catalyst, atrazine, water treatment, waste water, kinetics
Published: 05.07.2017; Views: 274; Downloads: 53
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42.
Magnetic field effects on redox potential of reduction and oxidation agents
Mojca Božič, Lucija Črepinšek-Lipuš, Vanja Kokol, 2008, original scientific article

Abstract: Redox potentials of two reducing (sodium dithionite and glucose) and two oxidizing (hydrogen peroxide and sodium hypochlorite) agents were monitored at various concentrations and at different temperatures for 30-75 minutes after the exposure of their water solutions (glucose and hypochlorite solutions once; sodium dithionite and hydrogen peroxide solutions one, two and/or three-times) to the static magnetic field of flux density of 0.9 V s M-2 . The aim of the investigation was to suggest improvements, i.e., intensification and stability, of the reduction-oxidation ability of selected agents applicable in textile fibre processing, primarily bleaching and vat dyeing. Results of the experiments show that magnetic treatment (of solutions) raises both the reducing ability of glucose and the oxidation ability of hydrogen peroxide and sodium hypochlorite, promising some technological and economical benefits for the textile industry as well as forother fields of chemistry.
Keywords: magnetic water treatment, sodium dithionite, glucose, hydrogen peroxide, sodium hypochlorite, redox potential, textile vat processing
Published: 05.07.2017; Views: 298; Downloads: 46
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43.
Independent clinical research may alleviate disparities in cancer treatment
Matjaž Zwitter, 2016, original scientific article

Abstract: Disparities in cancer care are a reality of the modern world. Unfortunately, current clinical research is in the hands of for-profit pharmaceutical companies and of researchers from the developed world. Problems specific to cancer care in developing countries and among deprivileged populations are ignored. Independent clinical research can offer new valuable knowledge and identify affordable and cost-effective treatments. As such, research not depending on commercial sponsors should become one of the important avenues to alleviate the problem of cancer disparities.
Keywords: clinical research, disparities in cancer care, cost-effective treatment
Published: 04.08.2017; Views: 484; Downloads: 200
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44.
Forward osmosis in wastewater treatment processes
Jasmina Korenak, Subhankar Basu, Malini Balakrishnan, Claus Hélix-Nielsen, Irena Petrinić, 2017, original scientific article

Abstract: In recent years, membrane technology has been widely used in wastewater treatment and water purification. Membrane technology is simple to operate and produces very high quality water for human consumption and industrial purposes. One of the promising technologies for water and wastewater treatment is the application of forward osmosis. Essentially, forward osmosis is a process in which water is driven through a semipermeable membrane from a feed solution to a draw solution due to the osmotic pressure gradient across the membrane. The immediate advantage over existing pressure driven membrane technologies is that the forward osmosis process per se eliminates the need for operation with high hydraulic pressure and forward osmosis has low fouling tendency. Hence, it provides an opportunity for saving energy and membrane replacement cost. However, there are many limitations that still need to be addressed. Here we briefly review some of the applications within water purification and new developments in forward osmosis membrane fabrication.
Keywords: wastewater treatment, biomimetic membranes, desalination, draw solutions, forward osmosis
Published: 18.08.2017; Views: 442; Downloads: 210
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45.
Selection of non-small cell lung cancer patients for intercalated chemotherapy and tyrosine kinase inhibitors
Matjaž Zwitter, Antonio Rossi, Massimo Di Maio, Maja Pohar Perme, Gilberto Lopes, 2017, original scientific article

Abstract: Background: When treating patients with advanced non-small cell lung cancer (NSCLC) with tyrosine kinase inhibitors and chemotherapy, intercalated schedule with time separation between the two classes of drugs should avoid their mutual antagonism. In a survey of published trials, we focus on relation between eligibility criteria and effectiveness of intercalated treatment. Methods: Published documents were identified using major medical databases, conference proceedings and references of published trials. Median progression-free survival (PFS) was taken as the basic parameter of treatment efficacy. Correlation between characteristics of patients and median PFS was assessed through the Pearson's correlation coefficient and the coefficient of determination, separately for first-line and second-line setting. Results: The series includes 11 single-arm trials and 18 randomized phase II or phase III trials with a total of 2903 patients. Treatment-naive patients or those in progression after first-line treatment were included in 16 and 13 trials, respectively. In 14 trials, only patients with non-squamous histology were eligible. Proportion of patients with nonsquamous carcinoma (in first-line setting), proportion of never-smokers (both in first- and second-line setting) and proportion of epidermal growth factor receptor (EGFR) mutant patients (both in first- and second-line setting) showed a moderate or strong correlation with median PFS. In six trials of intercalated treatment applied to treatment-naive EGFR-mutant patients, objective response was confirmed in 83.1% of cases and median PFS was 18.6 months. Conclusions: Most suitable candidates for intercalated treatment are treatment-naive patients with EGFR-mutant tumors, as determined from biopsy or liquid biopsy. For these patients, experience with intercalated treatment is most promising and randomized trials with comparison to the best standard treatment are warranted.
Keywords: lung cancer, NSCLC, intercalated treatment, EGFR, tyrosine -kinase inhibitors
Published: 30.10.2017; Views: 432; Downloads: 158
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46.
Accounting treatment of goodwill in IFRS and US GAAP
Mateja Jerman, Massimo Manzin, 2008, original scientific article

Abstract: The article presents an overview of the new accounting treatment of goodwill regarding International Financial Reporting Standards and American Generally Accepted Accounting Principles. Goodwill acquired through a business combination is no longer amortized but tested for impairment. Despite the fact that the objective of the new International Financial Accounting Standard has been to move towards international convergence; significant differences between standards still exist. The article presents the main changes of the regulation in the last years and the key differences between the two accounting treatments. In spite of the new accounting approach there are still lots of discussions, which indicate that the field is still not properly regulated. Finally, the article offers possible directions for future research and reporting practice.
Keywords: goodwill treatment, impairment of goodwill, intangible assets
Published: 28.11.2017; Views: 497; Downloads: 274
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47.
Reduction of sludge volume in waste waters at the end of the drinking water treatment process
Rebeka Fakin, 2018, master's thesis

Abstract: Water treatment at Seierstad drinking water treatment plant is done by chemical coagulation using aluminum-based coagulant. The quality of the drinking water source – Lake Farris, has decreased throughout the years, that is why more and more particles, organic matter and dissolved minerals must be removed. That contributes to the volume of sludge being produced at the end of the process. The main objective of the assignment is to reduce sludge volume by coagulation and flocculation in the sedimentation basins using a coagulant/flocculent. In order to choose the right coagulant tests have been performed in the laboratory and on the actual process. The laboratory analyses showed great potential and one of the coagulants has been chosen and tested on the actual process. The testing was followed up for the entire summer of 2016 and then compared to the year before. We have been following the pH and Al3+ content in the water being released back to the environment and visibility in the top water layer in the sedimentation basin. Cost analysis, including the cost of chemicals and electricity usage, has been done. The sludge reduction was successful, and it was approximately 49% less than the year before.
Keywords: Water treatment, lake Farris, sludge treatment using coagulation and flocculation, effects of aluminum on the environment.
Published: 09.03.2018; Views: 330; Downloads: 53
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48.
Formation of meso- and micro-pores in fly-ash zeolites using a three-step activation
Bhagwanjee Jha, D. N. Singh, 2014, original scientific article

Abstract: Researchers have comprehensively characterized alkali- activated fly-ash (the residue) and ascertained its highly zeolitic nature. In order to evaluate its potential for application as an adsorbent for the decontamination of waste water, the decisive parameters have mostly been the cation-exchange capacity, the mineralogy and the morphology of the residue. However, a study of the pore characteristics (e.g., the size and volume) of such residues is still warranted to anticipate their contaminant transport and the diffusion phenomena as a type of geotechnical engineering material. In this situation, the present study demonstrates the evolution of pores in the fly-ash after alkali activation up to three steps, and simultaneously, its effects` on other characteristics (e.g., the specific gravity, specific surface area and the cation-exchange capacity) of three types of similarly synthesized residues (the first, produced by using a NaOH aqueous solution and the other two residues, the result of alkali activation using a NaOH spent solution, the filtrates). Based on N2 gas absorption isotherms and infrared transmittance spectra, residues obtained from the second and third steps, each involving 24 hours of treatment using filtrates of 1.5-M NaOH, are established to be significantly enriched in the finer meso- and micro-pores, respectively, in comparison with a pure and macro-porous zeolite 4A.
Keywords: fly-ash, hydrothermal treatment, three-step activation, pore characteristics
Published: 14.06.2018; Views: 184; Downloads: 36
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49.
Criminal law dilemmas in withholding and withdrawal in intensive care
Damjan Korošec, 2016, original scientific article

Abstract: Regarding the question under which conditions a physician in Slovenia is allowed to omit life-prolonging medical treatment of dying patients, the main legal source is the Patient Rights Act, adopted in Slovenia in 2008 (parallel to Criminal Code of Slovenia). Under this law, there are two possible circumstances in deciding about life-prolonging medical treatment regarding dying patients: a) on the basis of the so-called patient's testament in the sense of Art. 34 of the Patient Rights Act; and b) without any known patient's testament in the sense of Art. 34 of the Patient Rights Act. Such decisions can also be contrary to a decisive wish of relatives of the dying patient to prolong the patientʼs life under all circumstances. If this decision is reached with full respect of the Patient Rights Act as well as the rules of medical science, omitting life prolonging medical treatment cannot be unlawful in the sense of medical criminal law.
Keywords: substantive criminal law, omission, life prolonging, medical treatment, Slovenia
Published: 08.10.2018; Views: 104; Downloads: 19
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50.
Selected legal problems of EEG biofeedback therapy under the Polish law
Aleksandra Nowak-Gruca, 2018, original scientific article

Abstract: The use of EEG biofeedback for therapeutic or healing purposes has its justification in modern research and recently one can notice the increasing popularity of this method. Possible threats which may be associated with improper training and EEG biofeedback therapy may result from error in the diagnosis or incorrect selection of the training protocol. The effectiveness of therapy depends largely on the efforts of the patient himself, however, the range of waves will be amplified or suppressed by diagnosticians and therapists. If during an EEG biofeedback, the correct neuronal signal is amplified or suppressed, this can have adverse effects. In Poland, there are no legal regulations regarding the acquisition of qualifications for conducting neurotherapy. Likewise, there are no indications as to which institutions have the right to assign appropriate powers to use this type of apparatus. The lack of legal regulations means that now everyone can practice neurotherapy. The article presents selected legal problems related to conducting EEG biofeedback therapy under law, especially under Polish regulations, including the problem of the responsibility of the therapist or trainer.
Keywords: EEG biofeedback, EEG applications, neurotheraphy, neurotherapist, legal liability, medical device, medical profession, patient's consent to treatment
Published: 09.10.2018; Views: 221; Downloads: 21
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