INVESTIGATION OF THE PROCESS OF PROCESSING LIQUID WASTE OF UREA PRODUCTION USING A BIOFILTER

The kinetic regularities of the recycling process of liquid waste of urea on the combined filter which contains the immobilized layer of enzymes at the process of their purification from the suspended substances, dissolved nitrate anions; the effect of pH on the filtration process are investigated and established in our research. A stable positive result was obtained on the filters with layers of: – oak and birch, the concentration of nitrate anions decreased from 12 to 0,06 — 0,05 mg/dm3 after 80 minutes of filtration. The content of suspended solids decreased from 37 g/dm3 to 6 — 7 g/dm3. At the same time, the increased content of tannins and the natural structure of oak and birch leaves contributes to the resistance of the leaf layer to fermentation processes, helps to use such kind of filter repeatedly. – linden and maple leaves, the concentration of nitrate anions decreased from 12 mg/dm3 to 0,08 mg/dm3 after 80 minutes of filtration. The content of suspended solids decreased from 37 g/dm3 to 15 g/dm3 after the third use of the filter, due to increased activity of microorganisms. At the same time, the natural structure of linden and maple leaves is thin, has a biofilm that is easily destroyed and accelerates the process of natural aerobic fermentation. The scientific substantiation of the direction of improvement of technology of processing of liquid waste with the increased content of nitrogen is executed. A bio filtration unit on a combined filter with a layer of oak and birch leaves with the use of an immobilized layer of enzymes is proposed. The combined filter consists of a layer of gravel, sand and dry oak and/or birch leaves. The enzyme Chymotrypsin at a concentration of 0,005 g/dm3 is fed into the formed bio filter from above. After 30 minutes, liquid waste with a temperature of 10 25 °С is gradually fed into the filter over 60 — 80 minutes. The initial concentration of suspended particles in liquid waste should not exceed a concentration of 37 — 40 g/dm3. It is determined that the optimal rate of processing of liquid waste of urea production is achieved in solutions with active reaction of hydrogen ions in the range of 6,5—7,3.

Overview of the Effectiveness of Aspirin, Ibuprofen, Acetaminophen On Teeth

The usage of medications like aspirin, ibuprofen and acetaminophen is well-accepted as pain relieving agents worldwide. Aspirin is a medication that is used not only for relieving pain but also for decreasing the risk of heart attack. Acetaminophen and ibuprofen have a significant role in decreasing chronic pain and inflammation. There is a deep connection between the dental procedures and the patients medicine intake. These effects can be known as side effects and damage the natural structure of the tooth or can be any disturbance in dental procedures especially in surgery and tooth extractions. Recognition of common medications and their effects is an important aspect not only for physicians but also for dentists and oral surgeons. The database of this article was derived from valid sources such as PubMed, Google scholar and Web of Science. The search method included the primary keywords like “aspirin”, “ibuprofen” and “acetaminophen” combined with “teeth”, “tooth extraction”, “oral cavity”, “dental procedures'', and/or “bleeding time”. Our results illustrated that a long-term application of aspirin favorably affects the patients who are suffering from angina, stroke or myocardial infarctions. Other findings confirmed that ibuprofen has antipyretic, analgesic and anti – inflammatory features. Effective characteristics of paracetamol as the medicine of choice for the treatment of post-exodontia pain was demonstrated according to several studies. In this review article we provide details about the effects of the three aforementioned medications, their usage in the dental field and any adverse effects on healthy tooth structures.

Reorganization of the topological surface mode of topological insulating α-Sn

α-Sn is a topologically nontrivial semimetal in its natural structure. Upon compressively strained in plane, it transforms into a topological insulator. But, up to now, a clear and systematic understanding of the topological surface mode of topological insulating α-Sn is still lacking. In the present work, first-principle simulations are employed to investigate the electronic structure evolution of Ge1-xSnx alloys aiming at understanding the band reordering, topological phase transition and topological surface mode of α-Sn in detail. Progressing from Ge to Sn with increasing Sn content in Ge1-xSnx, the conduction band inverts with the first valence band and then with the second valence band sequentially, rather than inverting with the latter directly. Correspondingly, a topologically nontrivial surface mode arises in the first inverted band gap. Meanwhile, a fragile Dirac cone appears in the second inverted band gap as a result of the reorganization of the topological surface mode caused by the first valence band. The reorganization of the topological surface mode in α-Sn is very similar to the HgTe case. The findings of the present work are helpful for understanding and utilizing of the topological surface mode of α-Sn.

Blue-green infrastructure as a new trend and an effective tool for water management in urban areas

Blue-green infrastructures (BGI) integrate solutions implemented to enhance water management and landscape values for more climateresilient and livable cities. BGI have created an opportunity to renew the natural structure of water balance in cities through the increase in rainwater retention and enlargement of permeable areas. The review of the literature on BGI development and solutions showed that the most popular BGI elements in terms of urban water quantity and quality were rain gardens, green roofs, vertical greening systems, and permeable pavements. Their structure and effectiveness were presented and reviewed. Despite the consensus between researchers that BGI benefit urban hydrology, differences in runoff decreased (2%-100%) lowering the peak flows (7%-70%) and infiltration (to 60%) or evapotranspiration (19%-84%) were reported. Due to an individual technical structure, each BGI element plays a specific role and there is no universal BGI solution against water-related problems. We inferred that the most effective ones were individually adapted solutions, which prevent from a stressor. The greater variety of solutions in a given area, the more benefits for the urban environment. Our analyses showed that a holistic and co-creative approach to create blue-green networks should be considered in modern water management plans.

Kerja Etnografi dan Imajinasi Sebagai Metode Penciptaan Teater Biografi Garam

Each of art creators has their own tendencies in producing their works. The choices of form and process are significantly influenced by their cultural and aesthetical experience. The objective is to obtain the originality of the ideas and to offer novelty among the development in the field of theatre todays. This writing is aimed to reveal the creative process of the producing of a theatre work entitled Biografi Garam (The Biography of Salt). Methodologically, this is a qualitative study to describe the method or the creative process. Ethnography and Estetika Paradoks are adopted to gain the structure of thoughts influencing the alternatives in constructing the performance aesthetic. The form of body theatre is chosen to obtain the natural structure of Madurese body as well as to release the identity to perform a free body. The creative process conducted through tubuh mengenal (the body knowing) and tubuh mengalami (the body experiencing) gives methodological experience on how the acts processed through natural body and situation becomes a theatre artwork. The background of Madurese people with all of the natural characteristics constructs the actor body so that a cultural body can be created on the stage. Ethnography and imagination process are the methods interrogating the body to become a theatre body performing Madura aesthetically to the stage. The form of a stage body is the construction result between the cultural Madura and the body execution in manifesting the ideas and imagination into an artwork that can be appreciated by the audience.

Connections and Patterns of Development of Medium-sized Businesses in Russia

Medium-sized entrepreneurship in many countries plays a stabilizing role in the economy. The article is devoted to the issues of assessing the situation in Russia from 2010 till 2019. The purpose of the study is to analyze the development of medium-sized entrepreneurship in Russia, including in the context of federal districts. The published results of study on this topic were analyzed in economic and instrumental sections. The dynamics of the number of medium-sized enterprises in Russia, including the situation in federal districts, was considered. More or less "successful" districts were identified, quantitative estimates were made. A downward trend in the number of employees in such enterprises was revealed. The dynamics of turnover of medium-sized enterprises was analyzed and compared to the number of employees. It was concluded that in some years there was dependence between these indicators, but in general for the period – there was not. The change in labor productivity was considered, the presence of positive dynamics in Russia as a whole and in districts was established. Structural analysis of investments in fixed assets per capita was carried out. Their natural structure was identified, the most and the least favorable years in this regard were identified. The general conclusion was made that the development of this form of management in the country, in particular, within the framework of the implemented National projects, is expedient and in demand.

The Concept of space-time quanta in future technologies

The article discusses the possibility of using the technological advantages that appear in connection with the discovery of the physical essence of Time and new interpretation of the structure of space in the form of space-time quanta. One of the problems that can be successfully solved on the basis of the new physical model is the problem of establishing the true nature of gravity. The solution to this problem is directly related to the implementation of the idea of unsupported motion based on the interaction in a certain way of the created asymmetric interference structure of longitudinal waves with the natural structure of spatial frequencies.