v.7 n.5 June
Parana Journal of Science and Education. v.7, n.5, June (2021)
Parana Journal of Science and Education. v.7, n.5, June (2021)
Summary
Summary
Articles
Articles
Valery Borisovich Morozov and Stefan Bernhard Rüster.
Valery Borisovich Morozov and Stefan Bernhard Rüster.
Parana J. Sci. Educ., v.7, n.5, (1-7), June 18, 2021.
Parana J. Sci. Educ., v.7, n.5, (1-7), June 18, 2021.
Abstract
Abstract
By neglecting the cosmological constant L, Einstein’s field equations in absence of matter and other fields read Gik = 0, which is not reasonable, since it violates the conservation law of total energy, momentum, and stress, because the gravitational field energy and momentum density cannot be represented by a vanishing Einstein tensor. In order to remedy this shortcoming, we construct a uniform metric, which allows us later to get a more general one, that is asymptotically equal to the Schwarzschild metric. This metric has a plausible energy-momentum density tensor of the gravitational field and correctly describes the effect of light deflection, but the perihelion shift of Mercury is overestimated. Because of the authors’ different view in order to overcome the shortcomings, different solutions are obtained.
By neglecting the cosmological constant L, Einstein’s field equations in absence of matter and other fields read Gik = 0, which is not reasonable, since it violates the conservation law of total energy, momentum, and stress, because the gravitational field energy and momentum density cannot be represented by a vanishing Einstein tensor. In order to remedy this shortcoming, we construct a uniform metric, which allows us later to get a more general one, that is asymptotically equal to the Schwarzschild metric. This metric has a plausible energy-momentum density tensor of the gravitational field and correctly describes the effect of light deflection, but the perihelion shift of Mercury is overestimated. Because of the authors’ different view in order to overcome the shortcomings, different solutions are obtained.
Narayanan Ramsundram, Abdul Rahman Hajira Sulthana, A. Deepak Kumar, K. R. Aranganayagam and D. Pricilla.
Narayanan Ramsundram, Abdul Rahman Hajira Sulthana, A. Deepak Kumar, K. R. Aranganayagam and D. Pricilla.
Parana J. Sci. Educ., v.7, n.5, (8-21), June 18, 2021.
Parana J. Sci. Educ., v.7, n.5, (8-21), June 18, 2021.
Abstract
Abstract
Decolorization of textile wastewater ensures efficient water recovery from textile effluents. Many researchers have explored the effectiveness of the Fenton process and have proven its ability to decolorize the textile effluent. However, the efficiency of the Fenton process depends on the operating variables, which are i) pH and ii) temperature. Maintaining neutral pH during the process of treatment to achieve the desired efficiency of the process in field reality is a challenging constraint In this research, the performance of the pH-based Fenton process is explored in two scenarios, a) acid-based (operating pH < 7), and b) base-based (operating pH > 7). The performance of the Fenton process in two scenarios was compared to the efficacy of coagulation and absorption of Ultra Violet rays. From the above processes, it is observed that Acid-based Fenton process has maximum efficiency towards decolorizing raw effluent compared to Base-based and coagulation in a controlled pH of 2 to 3 and optimal reaction time.
Decolorization of textile wastewater ensures efficient water recovery from textile effluents. Many researchers have explored the effectiveness of the Fenton process and have proven its ability to decolorize the textile effluent. However, the efficiency of the Fenton process depends on the operating variables, which are i) pH and ii) temperature. Maintaining neutral pH during the process of treatment to achieve the desired efficiency of the process in field reality is a challenging constraint In this research, the performance of the pH-based Fenton process is explored in two scenarios, a) acid-based (operating pH < 7), and b) base-based (operating pH > 7). The performance of the Fenton process in two scenarios was compared to the efficacy of coagulation and absorption of Ultra Violet rays. From the above processes, it is observed that Acid-based Fenton process has maximum efficiency towards decolorizing raw effluent compared to Base-based and coagulation in a controlled pH of 2 to 3 and optimal reaction time.
Gourav Kumar Singh, Swapnil Rai and Nimisha Jadon.
Gourav Kumar Singh, Swapnil Rai and Nimisha Jadon.
Parana J. Sci. Educ., v.7, n.5, (22-30), June 18, 2021.
Parana J. Sci. Educ., v.7, n.5, (22-30), June 18, 2021.
Abstract
Abstract
According to a WorldHealth Organization report, Gwalior in Madhya Pradesh is among the top fourcities in the world with the polluted air. 13 of the world's 20 cities with theworst air quality are in India. The allowable particulate matter levels inGwalior's air are three times higher than the standards. The biggest sources toair pollution are automobiles and industrialization; urbanization has resultedin the growth of industrial centers without a corresponding growth in civicutility or pollution control methods. In this study it is tried to bring outthe present scenario/condition of air pollution in Gwalior. For analyzing theambient air quality in Gwalior, the air pollutants CO, SOx, NOx, O3and PM (PM2.5, PM10) were used. To address variations inambient air quality, a trend analysis was performed. On the basis of the airquality index, the current investigation discovered that the ambient airenvironment is largely unhealthy (AQI). Poor air quality has both immediate andlong-term consequences for human health. According to the World HealthOrganization, all metro cities, including Gwalior, have air pollution levelsthat are excessive (WHO). The outcomes of this research could help localpolicymakers in Gwalior to adopt optimal management techniques for air qualitymanagement.
According to a WorldHealth Organization report, Gwalior in Madhya Pradesh is among the top fourcities in the world with the polluted air. 13 of the world's 20 cities with theworst air quality are in India. The allowable particulate matter levels inGwalior's air are three times higher than the standards. The biggest sources toair pollution are automobiles and industrialization; urbanization has resultedin the growth of industrial centers without a corresponding growth in civicutility or pollution control methods. In this study it is tried to bring outthe present scenario/condition of air pollution in Gwalior. For analyzing theambient air quality in Gwalior, the air pollutants CO, SOx, NOx, O3and PM (PM2.5, PM10) were used. To address variations inambient air quality, a trend analysis was performed. On the basis of the airquality index, the current investigation discovered that the ambient airenvironment is largely unhealthy (AQI). Poor air quality has both immediate andlong-term consequences for human health. According to the World HealthOrganization, all metro cities, including Gwalior, have air pollution levelsthat are excessive (WHO). The outcomes of this research could help localpolicymakers in Gwalior to adopt optimal management techniques for air qualitymanagement.
Regina Cauich Carrillo, Lauro Figueroa Valverde, Marcela Rosas Nexticapa, Eli Alejandra Garcimarrero Espino, Maria López Ramos,
Regina Cauich Carrillo, Lauro Figueroa Valverde, Marcela Rosas Nexticapa, Eli Alejandra Garcimarrero Espino, Maria López Ramos,
Maria Virginia del Socorro Mateu Armad, Magdalena Alvarez Ramirez and Tomas Lopez Gutierrez.
Maria Virginia del Socorro Mateu Armad, Magdalena Alvarez Ramirez and Tomas Lopez Gutierrez.
Parana J. Sci. Educ., v.7, n.5, (31-39), June 18, 2021.
Parana J. Sci. Educ., v.7, n.5, (31-39), June 18, 2021.
Abstract
Abstract
There are severaldrugs for treatment of heart failure such as digoxin, captopril, milrinone,dobutamine and others; however, some these drugs can produce some secondaryeffects. The aim of this study was to evaluate the biological activity of asteroid-azetidine derivative against heart failure as an alternativetherapeutic. In this way, the effectsproduced by the steroid-azetidine derivative against heart failure (translatedas infarct area) was evaluated using a biological model. Then, this effect wascomparing with the biological activity exerted by milrinone, digoxin,adenosine, flutamide and tamoxifen on infarct area. Besides, the biologicalactivity of the steroid-azetidine analog on left ventricular pressure wasevaluated in the presence or absence of indomethacin and nifedipine. Theresults showed that steroid-azetidine derivative decrease the infarct area in adose-dependent manner and this effect was different to biological activityproduced by milrinone, digoxin, adenosine, flutamide and tamoxifen. Otherresults showed that steroid-azetidine derivative increases left ventricularpressure in a dose-dependent manner (0.001-100 nM); however, this phenomenonwas significantly inhibited only by nifedipine at a dose of 1 nM. These resultsindicate that positive inotropic activity produced by the steroid-pyridinederivative was via calcium channel activation. In conclusion, this steroidcould be considered as a good candidate for the treatment of heart failure.
There are severaldrugs for treatment of heart failure such as digoxin, captopril, milrinone,dobutamine and others; however, some these drugs can produce some secondaryeffects. The aim of this study was to evaluate the biological activity of asteroid-azetidine derivative against heart failure as an alternativetherapeutic. In this way, the effectsproduced by the steroid-azetidine derivative against heart failure (translatedas infarct area) was evaluated using a biological model. Then, this effect wascomparing with the biological activity exerted by milrinone, digoxin,adenosine, flutamide and tamoxifen on infarct area. Besides, the biologicalactivity of the steroid-azetidine analog on left ventricular pressure wasevaluated in the presence or absence of indomethacin and nifedipine. Theresults showed that steroid-azetidine derivative decrease the infarct area in adose-dependent manner and this effect was different to biological activityproduced by milrinone, digoxin, adenosine, flutamide and tamoxifen. Otherresults showed that steroid-azetidine derivative increases left ventricularpressure in a dose-dependent manner (0.001-100 nM); however, this phenomenonwas significantly inhibited only by nifedipine at a dose of 1 nM. These resultsindicate that positive inotropic activity produced by the steroid-pyridinederivative was via calcium channel activation. In conclusion, this steroidcould be considered as a good candidate for the treatment of heart failure.
Amauri Betini Bartoszeck and Leandro Kruszielski.
Amauri Betini Bartoszeck and Leandro Kruszielski.
Parana J. Sci. Educ., v.7, n.5, (40-53), June 18, 2021.
Parana J. Sci. Educ., v.7, n.5, (40-53), June 18, 2021.
Abstract
Abstract
This broad study isconcerned with the development of the conception of skeletons and organ and organ system ofselected vertebrates, what children and adolescents think they have insidetheir bodies by means of drawings. It is based on a quantitative investigationinvolving a total of 1.771 students in Southern Brazil between ages 6 and 14.This cross-sectional study that investigates the structuring of understandingof bones, skeletons, and internal anatomy of a rat, a fish a bird andthemselves. Data analysis was carried out following a scoring protocol andentered into SPSS. The majority of the students failed to understand theskeleton and organ and organ systems as a functional integrated unit. A connection to the development of thenervous system is discussed referring to ages six to fourteen year olds pupils.Implications for aspects of science literacy and biological education arediscussed.
This broad study isconcerned with the development of the conception of skeletons and organ and organ system ofselected vertebrates, what children and adolescents think they have insidetheir bodies by means of drawings. It is based on a quantitative investigationinvolving a total of 1.771 students in Southern Brazil between ages 6 and 14.This cross-sectional study that investigates the structuring of understandingof bones, skeletons, and internal anatomy of a rat, a fish a bird andthemselves. Data analysis was carried out following a scoring protocol andentered into SPSS. The majority of the students failed to understand theskeleton and organ and organ systems as a functional integrated unit. A connection to the development of thenervous system is discussed referring to ages six to fourteen year olds pupils.Implications for aspects of science literacy and biological education arediscussed.
Valeri Stefchev Yordanov.
Valeri Stefchev Yordanov.
Parana J. Sci. Educ., v.7, n.5, (54-60), June 18, 2021.
Parana J. Sci. Educ., v.7, n.5, (54-60), June 18, 2021.
Abstract
Abstract
Caring for the modernyounger generation is one of the priority directions in the activities of thestate and society. Along with the problems of upbringing and education ofchildren, serious attention is being paid to the problem of working on theirphysical preparation and development. In connection with this is the enduringrelevance of physical education as a subject and profession. Our nationalsocial horizon is much more developed today. All this determines the newchallenges facing the upbringing and education of the younger generation for abetter life Exploring the psycho-physical capabilities of student’s 5thclass about the need for physical education and sports: Development of moraland physical qualities is one of the main tasks of physical education inschool. The issue of qualitative improvement in students is especially relevantin the modern stage of development of physical education and sport. Physicalexercises strengthen the health of those involved, form knowledge and skills,develop basic physical skills, and improve performance of the body.
Caring for the modernyounger generation is one of the priority directions in the activities of thestate and society. Along with the problems of upbringing and education ofchildren, serious attention is being paid to the problem of working on theirphysical preparation and development. In connection with this is the enduringrelevance of physical education as a subject and profession. Our nationalsocial horizon is much more developed today. All this determines the newchallenges facing the upbringing and education of the younger generation for abetter life Exploring the psycho-physical capabilities of student’s 5thclass about the need for physical education and sports: Development of moraland physical qualities is one of the main tasks of physical education inschool. The issue of qualitative improvement in students is especially relevantin the modern stage of development of physical education and sport. Physicalexercises strengthen the health of those involved, form knowledge and skills,develop basic physical skills, and improve performance of the body.
Parana Journal of Science and Education. ISSN 2447-6153
Parana Journal of Science and Education. ISSN 2447-6153