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There are many substances in extra virgin olive oil (EVOO), of which many have a beneficial effect. One of the most interesting substances in EVOO is Oleocanthal. This substance is first recognised in 2005 and can only be found in EVOO. Under further investigations it was proven that in vitro Oleocanthal has an anti-inflammatory effect comparable to Ibuprofen. This is due to the fact that it is an inhibitor of cyclooxygenase. It is able to form prostanoids, including thromboxane, which takes part in formation of thrombosis, and prostaglandins including prostacyclin, which prevent the formation of the platelet plug during blood clotting and acts as a vasodilator. The quality control of an EVOO is very important, because most often refined oils such as olive-pomace oil, seed oils or synthetic oils are used. In some cases, this may lead to serious health problems after consumption. Such an incident happened 1981 in Spain (Spanish toxic Oil syndrome) where 20000 people were affected from which 330 died from aniline intoxication. Optical techniques are ideal for this purpose because they are simple, cost-effective, rapid and non-destructive. Fluorescence spectroscopy has different applications: detection of adulteration, geographic region, quantification of fluorescent components, monitoring of photo-oxidation and thermal and assessment of quality changes of olive oil during storage.
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In 2017/2018 school year in the new curriculum of the subject “Protection of Population and Infrastructure” for the first time will appear discipline “Applied Physics”. It focuses on practical-applied knowledge in physics and its application in different situations, sometimes in extreme conditions.Under the available state of the University‘s material base, non-standard methods should be done to students and learners and to find ways to apply their knowledge and skills in various non-standard situations, sometimes even non-traditional.In the lab, each student will conduct his/her own experiment in which he she will apply his knowledge both in physics and related subjects.
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In the present study, some electrical properties of polylactic acid (PLA) composite films with different percentages of MgO – 0 wt%, 2 wt%, 4 wt% and 8 wt% were investigated. Composite films were prepared using a Brabender Plastograph EC Plus blender under controlled electric heating for 5 minutes at 190 ° C. The films obtained were charged by the corona discharge method using a tri-electrode system for 1 minute under room conditions. Positive or negative 5kV voltage was applied to the corona electrode. 1 kV voltage of the same polarity as that of the corona electrode was applied to the grid. The surface potential of the charged samples was measured by the vibrating electrode method with compensation. The time dependencies of surface potential were investigated. The results obtained show a significant change in the electret behavior of PLA composite films after insertion of MgO particles with different concentration. Some dielectric and impedance characteristics of composite films were also studied. Dielectric permittivity was calculated. The results obtained show a change in dielectric permittivity by increasing the concentration of the inserted MgO particles in the PLA matrix.
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mushrooms; isothermal drying; mathematical modelEleven kinds of mathematical models were used to obtained moisture data. From obtained results, the semi-theoretical models chosen in this work proved to be quite good to describe the drying behavior of isothermal drying. In the experiment, Modified Henderson and Pabis model was most appropriate for fitting MR − t curve of isothermal drying of hot-air drying, its correlation coefficients is above 0.999; for chi-square is below 0.0075; for root mean square error is below 0.0077.
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In this text-experiment I will try to think in a new direction the proximity of illustricture with the figurology of Boyan Manchev. Illustricture is a dynamic mode of work of the introduced here concept figure-form (dynamized form), through which it becomes understandable why and how a figurative potentiality can evolve to a conceptual opportunity. Figurativеness can also be thought as one unlocking its own field of potentiality and self-actualizing forceful virtuality. The non-classical hypothesis of that experiment is: the being’s act of affirmation of linguistic meanings illustricturatively creates (unpredictable) essences, as long as it contains within itself repetitive structure charged with deviation.
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The paper presents game-like elements suitable for the realization of a gamified e-course and their representation as components in the e-learning environment Moodle. An example of the design of a gamified e-learning course in Moodle is shown. The paper contains comparison charts for the assessment of the course participants. Feedback of the effectiveness of certain aspects of the gamified e-course is collected by a survey.
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The paper is dedicated to transcendental equations. Presently, combinations of exponential, logarithmic and trigonometric functions in a transcendental equation are considered. Approaches to solve them are proposed.
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Two classes of curves of (n+1)-th degree (n E N) e are obtained in the plane of a given triangle in connection with the generalization of a problem on locus determination. What are described are the common points of those curves and two regular polygons determined by the points of intersection of the curves and the circumcircle of the triangle.
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A geometric relation is considered between polynomials with roots in three collinear points and the roots of their corresponding derivatives by means of a set of ellipses generated by the polynomial roots.
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The present paper considers an application of the triangle inequality to integer triangles. Formulae are found for their number in the cases of equilateral, isosceles and scalene triangles. The formulae give opportunities for quick problem solving in regular math classes at school as well as at the level of competitions.
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Making mistakes is a crucial part of human learning. Together with mistakes, misjudgements, miscalculations and wrong assumptions are indispensable aspects of learning skills and acquiring information. The mistakes one makes are gradually reduced as one learns from those mistakes. The provision of feedback from the environment facilitates the eventual learning. In this respect, language learning is no exception. The points of departure for the present study was to see whether the basic options and features in one such model (Long cited in Allwright and Bailey, 1991) were viable modes of error correction in the classroom. A questionnaire was prepared based on Long’s model in an attempt to see if the same decision-making process was followed by teachers in actual learning situations. Likewise, a similar study was also prepared to have an insight into the students’ perspective on error correction. The results of the present study (teachers’ responses in particular) tend to confirm the viability of Long’s model. In conclusion, it has been revealed that it is the teachers’ task to value their students’ attempts to improve themselves on the interlanguage continuum, be sensitive and receptive to their linguistic output and try his/her best to utilize the optimum way of dealing with their errors.
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The goal of the article is to reveal the extent of RSCI reflection of the Bulgarian publications/references in two aspects: the Bulgarian-language articles and the Bulgarian-language books. The comparative analysis was used in the study. It has been established that the Cyrillic alphabet and the Bulgarian language is not an obstacle to Russian Science Citation Index; it successfully indexes publications/references in Bulgarian. This fact indicates that Russian Science Citation Index is able to give an effective contribution to refine results of Bulgarian academic organizations ranking.
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In this paper we present the results of a simulated model of resonator device comprised of AlScN/6H-SiC piezo-layers for use in RF electronic circuits. The device uses the piezoelectric effect and Al electrode gratings to generate Lamb waves with great frequencies. The small mechanical impedance, micrometric size and good electromechanical characteristics make it especially suited for the manufacturing of RF band-pass filters. Moreover, because of the mechanics of the Lamb Wave Resonator (LWR) device, it can allow for multiple resonant frequencies to be used with the same configuration. Here we show the basic characteristics of one such system using Al0,91Sc0,09N piezo-active layer and base layer from hexagonal SiC.
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The present work introduces the structure, tactical and technical features and application of the AK-630, a Russian automated anti-air defense system. Systematic technical data and a detailed explanation of each aspect allow for maximum insight into the matter under consideration.
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The text examines current issues of contemporary education. Placing focus on achieving an integrated learning outcome in the form of a set of pupils’ skills requires focusing on the interdisciplinary nature of the learning process. The author examines models for its practical application in school.
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The development of electronic tests and exercises is part of the didactic test theory. Tests can be successfully applied across all disciplines to determine the entry level, to verify and control the learning contents, and to report outcomes at the end of the training period.The “Hot Potatoes” program offers the opportunity to use several didactic models: JQuiz – JakeCuiz, JCloze – JackClose, CrossJackros, JMix – JayMix, JMatch – JeMech. The use of the program is fully in line with the contemporary understanding of didactic tests for learning purposes. The logical arrangement of the exercises is in compliance with the curriculum and based on the chronological principle. The electronic exercises of the “Hot Potatoes” program are used for revision exercises, homework assignments, error correction, performance comparison and more.
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This article provides information on a pedagogical experiment in which the computer presentation stays as a visual support for a diverse teaching with innovative approach. The key milestones include: subject, object, aim, objectives, hypothesis, scope, criteria, indicators, the study methodology and achieved results.
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The article presents some results from researching the cultural heritage of the Bulgarian communities in Central and Western Europe from 1991 to 2015. Empirical data on the use of distance learning in Bulgarian schools abroad are collected through electronic survey and discussion meetings with teachers. Based on the teachers’ suggestions Virtual Information Center has been created. The aim is to support the process to meet the communication and cultural needs of Bulgarians who live in our communities abroad and exchange of best pedagogical practices in a virtual educational environment.
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