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O.A. Artemyeva

Pseudomonas aeruginosa is a free-living bacterium that is conditionally pathogenic in natural conditions, but when ingested by an animal can cause severe infectious diseases, depending on the location and stage of infection, increasing the time of convalescence. It is naturally resistant to a number of widely used antibacterial drugs: fluoroquinolones, tetracyclines, chloramphenicol; it is capable of forming a biofilm. The aim of this work was to assess the level of sensitivity of strains isolated from cow's milk to the main groups of antibiotics with clinically significant anti-pseudomonasal activities. The work provides microbiological monitoring data for 2020-2021. During this period, 350 milk samples were taken from Holstinized black-and-white cows of the dairy direction of various lactation ages. All isolates were characterized by generally accepted phenotypic methods, with confirmation of biochemical properties. A number of antibiotics selected in this work comply with the recommendations of EUCAST. Sensitivity testing of the isolated strains was carried out by the disco-diffuse method. Pseudomonas aeruginosa was detected in 69 milk samples, which accounted for 19.7% of the total number of milk samples. Pseudomonas Aeruginosa was isolated as a monoculture in 42.03% of cases, in association with gram (-) bacteria in 20.29% and gram (+) in 37.68%. The percentage of pigmented strains in our work was 98.55% of all isolated strains, and 1.45% of poorly pigmented. During the research work, it was found that more than 90% of the strains were resistant to cefepime, the rest showed partial resistance. Therefore, it can be recommended for use only after a correction for sensitivity to this drug. The aminoglycoside group drugs, amikacin and gentamicin, had the highest activity - over 90% against the isolated Ps.a. strains. The results obtained indicate that the isolated strains of Ps.a. they showed high resistance to representatives of the cephalosporin group, which is also increasing with respect to fluoroquinolones, which is a serious problem in the spread of antibiotic resistance.

2021 ◽  
Vol 5 (11) ◽  
pp. 41-46
Xiaohong Shi ◽  
Kezhi Li

With the continuous demand of material performance, the development of materials is rapid, and the professional curriculum teaching of “new inorganic materials” as well as its teaching methods related to the internet mandate a reform, in order to meet the needs of innovative high-quality personnel training. The update and optimization of the teaching content and methods assisted by the internet meet the needs of modern teaching and research work. More than 90% of students believe that internet teaching is conducive to the understanding of classroom knowledge and the development of innovative projects.

2021 ◽  
Vol 22 (1) ◽  
Krzysztof Wałęsa ◽  
Krzysztof Talaśka ◽  
Dominik Wilczyński ◽  
Jan Górecki ◽  
Dominik Wojtkowiak

AbstractThe paper discusses the topic of butt welding of polyurethane drive belts by the hot plate method in the context of modeling the process of this technological operation. Based on the analysis of the butt welding process, a series of studies of the thermomechanical properties of the material from which the belt is made has been planned. The results will be used for mathematical modeling of the welding process, and in particular its most important phase: the plasticizing operation. On this basis, the study of the compression of cylindrical specimens taken from the belt has been performed at two different speeds. Their result is the relationship between the compressive stress σc and the modulus of longitudinal elasticity Ec at compression and: deformation εc, temperature value T, as well as the compressive velocity vc. In the next step, dynamic viscosity η of the belt material was determined based on the results of dynamic thermomechanical analysis. The research work culminated in the attempts to plasticize the material on a hot plate, in conditions similar to the process of industrial welding. These studies were performed at different speeds vpl, resulting in the correlation between the force required for plasticizing Fpl and the value of the speed of the belt end vpl relative to the hot plate heated to a temperature Tp. The obtained results will be used to formulate a mathematical model of plasticizing the material, based on the selected mechanical deformation models.

2021 ◽  
Vol 11 (23) ◽  
pp. 11314
Keke Zhi ◽  
Zhe Li ◽  
Pengfei Ma ◽  
Yongxiang Tan ◽  
Yuefeng Zhou ◽  

Advanced oxidation technology of persulfate is a new method to degrade wastewater. As the economy progresses and technology develops, increasingly more pollutants produced by the paper industry, printing and dyeing, and the chemical industry are discharged into water, causing irreversible damage to water. Methods and research directions of activation persulfate for wastewater degradation by a variety of iron-based catalysts are reviewed. This review describes the merits and demerits of advanced oxidation techniques for activated persulfate by iron-based catalysts. In order to promote the development of related research work, the problems existing in the current application are analyzed.

Innocent Sourou KOUTCHADÉ

In mass communication, the material process use makes it easy to lay emphasis on the participants’ actions, events, and circumstances of their occurrence, while mental process contributes to insisting on their psychological and emotional states. As for indirect speech, it characterizes the version always used by messengers, public announcers, journalists, and reporters. This study aims to analyze Transitivity and Indirect Speech in clauses ingrained and identified in some passages taken from Helon Habila’s Oil On Water (2011). One of the major principles of Systemic Functional Linguistics is that the exploration of the Transitivity properties (processes, participants, and circumstances) in a text leads to draw conclusions about the question -“who does what to whom, under what circumstances?”? In order to deliver the set objectives, the ongoing study specifically draws on the principles of experiential meaning to get data from the selected extracts and, focuses on describing the clauses containing reported speeches. By following the mixed research methods guiding principles, this research work has generated some data which enable to come up with a conclusion on the psychological and psychosomatic states of the participants as well as on the assigned status adopted by some characters. That correlates them to reporters and journalists. This research work has enabled me to develop another. This paper has made it easy to have another view about Helon Habila’s messages and the way they are conveyed throughout his novel.

Subramaniyan C ◽  
Prakash K B ◽  
Amarkarthik A ◽  
Kalidasan B ◽  

Demand and conservation for potable water has become a foremost concern world-wide. Many technologies were adapted for converting the saline water to potable water to meet the required demand on water conservation. In the current research work triangular solar still with rectangular-fins attached to the basin is proposed to enhance the output of potable water from the solar still setup. Solar still with and without rectangular-fins on the basin are fabricated for experimental comparison and evaluation in addition to numerical investigations. Thermal Performance, instantaneous efficiency and potable water output of the proposed solar still & base solar still are investigated during March month for the location of Sathyamangalam. Investigation shows enhancement of water production in the proposed solar still by 41% higher compared to the base still. The maximum distillate output from modified still and base still for a typical day is 3.1 liter and 2.2 liter respectively.

Chaitanya J Sonawane ◽  
Atul A Patil ◽  
Vikrant M Patil ◽  
Paresh A. Patil

Medicinal plants have played an important role since ancient times in treating various kinds of diseases. Increased drug resistance and side effects of pharmaceutical drugs have led to more research-based study on traditionally available plants. Enhydra fluctuans is one such plant which is available abundantly in India especially in the North-Eastern states. It has immense potential as a medicinal plant and also has many beneficial effects such as anticancer, antioxidant, antidiabetic, anti-inflammatory, antimicrobial, anti-diarrheal, hepatoprotective and even neuropharmacological effects. These activities can be attributed mainly to the presence of phytochemicals such as flavonoids, alkaloids, saponins, tannins, phenols and carbohydrates. The aim of this paper is to summarize the importance of this plant possessing potent medicinal value and the research work being carried out till now.

2021 ◽  
Vol 10 (1) ◽  
pp. 67-68

In the past period the research work under-taken arcording to the programme of the International Geophysical Year has yielded its first results.

2021 ◽  
Vol 213 (10) ◽  
pp. 21-30
I. Gorbunov ◽  
Aleksey Luk'yanov ◽  
Stanislav Mihaylovskiy

Abstract. The purpose of this scientific work was to find and study the diversity of wild grapes as future promising sources of breeding and valuable traits on the example of the territory of the natural reserve “Krasnyy les”. Scientific novelty. Analysis of modern scientific literature on the study of the biodiversity of the Vitaceae Juss family. He showed that there is practically no scientific information on the Kuban wild forms and autochthons of grapes. This article is the beginning of a new large research work on the study of wild grapes of Kuban, studied in the territory of the Krasnodar Territory, in particular, in the state nature reserve “Krasnyy les”. Methods. The following methods were used: route-reconnaissance (during expeditions), traditional geobotanical and ampelographic, analytical. Results. 5 isolated populations of wild grapes were found on the territory of the natural reserve “Krasnyy les”. These forms were first studied and described according to the ecological and geographical conditions of growth and morphological features of the vegetative and generative spheres of grape plants. Significant variability of some indicators was revealed, for example: the openness of the crown of a young shoot and its degree of spider pubescence, the degree of bristly and spider pubescence of the underside of the formed leaf, the shape and corrugation of the leaf blade, etc. At the same time, the clusters of the studied wild forms of grapes are small, loose; the berries are also small, mostly black in color with a sweet tart taste. The presence of damage by pests and diseases is not visually detected. These isolated grape populations may hypothetically belong to Vitis vinifera ssp. Silvestris Gmel. or its varieties var. Tipica Negr. (wild forest grapes). Samples were taken for further genetic analysis in order to confirm or refute the above hypothesis. This study was conducted within the framework of the RFBR grant project (Contract No. 19-416-230025). Practical significance. The studied wild-growing forms of grapes can be used as promising sources of economically valuable breeding traits in the creation of new varieties, hybrid or clonal forms of grapes that are resistant to abiotic and biotic environmental factors.

Ramkrishna Mahanta ◽  
Prof. Birbal Saha

Leadership has been an area of absorption among scholars and researchers. Leadership skills are a precondition to procure to a systematic and methodical approach which would direct the organization, group institute or an individual to a progressive ground. There has been a lackadaisical yet progressive change which persevered to conceptualise and determine the substantive definition and alms of leadership. Educational leadership hence attracts interest owing to its contribution towards academics. This research work sheds light on to the importance of leadership and its application in academics. The work delves into a study of the effects of leadership on the students’ learning process and to focus on the meaningful work which the educational leaders are engrossed in and outside the classroom and educational premises. KEYWORDS: Leadership, School Education, Educational Leadership, Leadership Effects on Students

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