Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.735_periodico36_pgs_720_734.pdf
N. Rodionova, E.S. Popov, Anatoly Khitrov, N. A. Rodionova, Elena Egorova
The effective functioning of all body systems is mostly determined by many essential substances that act as activators of metabolic reactions. Their diet deficiency leads to violations of alimentary nature homeostasis, exacerbated by environmental, social, and economic factors. This study aimed to compare antihypoxant properties nutrients of the vegetable and animal origin, their impact on respiratory and transport parameters of gas exchange, as criteria for the energy balance of the body, and the assessment of probiotic factor in improving the antihypoxant properties of targeted biologically active substances. The increase in the efficiency of gas exchange was evaluated on the example of students and teachers of an engineering university at ages from 16 to 65 in daily consumption of food products with known biocorrective properties: wheat germ oil (WGO), wheat germ oil meal (WGOM), concentrated tissue fish oil (CTFO) and their combinations with the biomass of the lacto- and Bifidus bacteria consortium. The change of energy efficiency of the nutritional status was assessed based on the analysis of the carbon dioxide (CO2) and oxygen (O2) concentration in the exhaled gas-air mixture and the level of hemoglobin (SpO2). Their values were recorded before and after the daily consumption of the tested products for 30 days. The average values of parameters in all age groups have demonstrated that the most effective antihypoxant is the wheat germ oil meal. A combination of biocorrectors under investigation with active forms of probiotic microorganisms provides a more active antihypoxant effect for all products under investigation in all age groups. The obtained data make it possible to state the possibility of an operational alimentary impact on gas exchange efficiency and prove the antihypoxant properties of WGO, WGOM, CTFO, and the synergetic effect of their combination with probiotic microorganisms in the active form.
{"title":"IMPACT ASSESSMENT OF ALIMENTARY BIOLOGICAL CORRECTORS ON THE ENERGY EFFICIENCY OF NUTRITIONAL STATUS","authors":"N. Rodionova, E.S. Popov, Anatoly Khitrov, N. A. Rodionova, Elena Egorova","doi":"10.52571/ptq.v17.n36.2020.735_periodico36_pgs_720_734.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.735_periodico36_pgs_720_734.pdf","url":null,"abstract":"\u0000The effective functioning of all body systems is mostly determined by many essential substances that act as activators of metabolic reactions. Their diet deficiency leads to violations of alimentary nature homeostasis, exacerbated by environmental, social, and economic factors. This study aimed to compare antihypoxant properties nutrients of the vegetable and animal origin, their impact on respiratory and transport parameters of gas exchange, as criteria for the energy balance of the body, and the assessment of probiotic factor in improving the antihypoxant properties of targeted biologically active substances. The increase in the efficiency of gas exchange was evaluated on the example of students and teachers of an engineering university at ages from 16 to 65 in daily consumption of food products with known biocorrective properties: wheat germ oil (WGO), wheat germ oil meal (WGOM), concentrated tissue fish oil (CTFO) and their combinations with the biomass of the lacto- and Bifidus bacteria consortium. The change of energy efficiency of the nutritional status was assessed based on the analysis of the carbon dioxide (CO2) and oxygen (O2) concentration in the exhaled gas-air mixture and the level of hemoglobin (SpO2). Their values were recorded before and after the daily consumption of the tested products for 30 days. The average values of parameters in all age groups have demonstrated that the most effective antihypoxant is the wheat germ oil meal. A combination of biocorrectors under investigation with active forms of probiotic microorganisms provides a more active antihypoxant effect for all products under investigation in all age groups. The obtained data make it possible to state the possibility of an operational alimentary impact on gas exchange efficiency and prove the antihypoxant properties of WGO, WGOM, CTFO, and the synergetic effect of their combination with probiotic microorganisms in the active form.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47781775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.521_periodico36_pgs_506_526.pdf
O. Prischepa, Y. Nefedov, Aydar Kh Ibatullin
The study of the hydrocarbon potential of the Arctic is being considered in Russia as the most crucial direction of preparing a new raw material base of oil and gas, which will replace the extracted reserves in traditional areas of development during the second third of this century. The sharp fall in global hydrocarbon prices has led to a reduction in research and exploration costs, especially in hard-to-reach areas and hard-to-recover reserves as well as the need to determine the contribution to the country's fuel and energy balance from the hydrocarbons development of the Arctic zone, including the shelf, without which it is impossible to plan and develop new expensive projects. A fair assessment of oil and gas potential, based on a set of ideas about the processes of formation of sedimentary basins and oil and gas generation processes, contributed to obtaining new geophysical information on the results of seismic work executed in the Arctic zone of the Russian Federation between 2010 and 2020. A quantitative assessment of oil and gas resources was performed using geological analogies (for wellstudied geological and geophysical areas) and the volume-genetic method (for less studied basins). It showed significant differences from the most well-known assessments of the Arctic, both in terms of the total volume of hydrocarbons and their phase composition. It was concluded that there is ambiguity in assessing the potential of deepwater zones of the Arctic seas. Because of that, it is important to study coastal and shallow areas, especially oil content.
{"title":"RAW MATERIAL SOURCE OF HYDROCARBONS OF THE ARCTIC ZONE OF RUSSIA","authors":"O. Prischepa, Y. Nefedov, Aydar Kh Ibatullin","doi":"10.52571/ptq.v17.n36.2020.521_periodico36_pgs_506_526.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.521_periodico36_pgs_506_526.pdf","url":null,"abstract":"\u0000The study of the hydrocarbon potential of the Arctic is being considered in Russia as the most crucial direction of preparing a new raw material base of oil and gas, which will replace the extracted reserves in traditional areas of development during the second third of this century. The sharp fall in global hydrocarbon prices has led to a reduction in research and exploration costs, especially in hard-to-reach areas and hard-to-recover reserves as well as the need to determine the contribution to the country's fuel and energy balance from the hydrocarbons development of the Arctic zone, including the shelf, without which it is impossible to plan and develop new expensive projects. A fair assessment of oil and gas potential, based on a set of ideas about the processes of formation of sedimentary basins and oil and gas generation processes, contributed to obtaining new geophysical information on the results of seismic work executed in the Arctic zone of the Russian Federation between 2010 and 2020. A quantitative assessment of oil and gas resources was performed using geological analogies (for wellstudied geological and geophysical areas) and the volume-genetic method (for less studied basins). It showed significant differences from the most well-known assessments of the Arctic, both in terms of the total volume of hydrocarbons and their phase composition. It was concluded that there is ambiguity in assessing the potential of deepwater zones of the Arctic seas. Because of that, it is important to study coastal and shallow areas, especially oil content.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47836500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.899_periodico36_pgs_884_909.pdf
Fabrizio Belli Riatto
Physics, like the teaching of natural sciences, is fundamental for scientific and technological development. Although of fundamental importance to society, there is a significant lack of interest in high school students. This study aimed to develop and apply a strategy that involved a “game of questions and answers” to introduce the study of mechanics in a differentiated and more attractive way for students. For example, when talking about strengths, common sense is very ingrained, and it becomes complex to promote conceptual change in young apprentices. The game was used as a problematization to create an environment of need to search for new knowledge to face situations and answer questions. The proposal was applied to a second-year high school class at a private school in Porto Alegre. The sample consisted of thirty-three students aged between fifteen and seventeen, divided between eighteen girls and fifteen boys. The application was made during regular classes. The game was born from the need to create students with a willingness and predisposition to seek knowledge and transform their thinking about physics. The formulation of questions and answers was designed to make minimal subunits to search fora new experience. Through the students' responses, it was possible to observe that the degree of satisfaction was relatively high and that they liked the game itself and the change in the classic and plastered form that the content was worked on.
{"title":"EMPLOYMENT OF A SET OF QUESTIONS AND ANSWERS AS A WAY TO PROBLEMATIZE AND MOTIVATE THE TEACHING OF PHYSICS IN HIGH SCHOOL","authors":"Fabrizio Belli Riatto","doi":"10.52571/ptq.v17.n36.2020.899_periodico36_pgs_884_909.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.899_periodico36_pgs_884_909.pdf","url":null,"abstract":"\u0000Physics, like the teaching of natural sciences, is fundamental for scientific and technological development. Although of fundamental importance to society, there is a significant lack of interest in high school students. This study aimed to develop and apply a strategy that involved a “game of questions and answers” to introduce the study of mechanics in a differentiated and more attractive way for students. For example, when talking about strengths, common sense is very ingrained, and it becomes complex to promote conceptual change in young apprentices. The game was used as a problematization to create an environment of need to search for new knowledge to face situations and answer questions. The proposal was applied to a second-year high school class at a private school in Porto Alegre. The sample consisted of thirty-three students aged between fifteen and seventeen, divided between eighteen girls and fifteen boys. The application was made during regular classes. The game was born from the need to create students with a willingness and predisposition to seek knowledge and transform their thinking about physics. The formulation of questions and answers was designed to make minimal subunits to search fora new experience. Through the students' responses, it was possible to observe that the degree of satisfaction was relatively high and that they liked the game itself and the change in the classic and plastered form that the content was worked on.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47105053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.101_periodico36_pgs_85_99.pdf
R. D. Costa, D. C. Silva, S. Gualberto, Paulo Sávio Damásio Da Silva, M. A. M. Costa
The control of Aedes aegypti, which transmits several arboviruses of importance to public health, has as strategies the use of synthetic insecticides, integrated with environmental control. Its control is mainly directed to the larvae and adult phases. The egg phase is difficult to control, as it has great resistance to environmental conditions. The objective of this work was to evaluate the ovicidal potential of the essential oil obtained from the leaves of Croton argyrophyllus, on Aedes aegypti, as well as to determine the moisture content, the yield, and its chemical composition. The eggs were exposed to the aqueous solution of the essential oil in 10% Tween 80, in the concentration of 12 mg mL-1, for a period of 15, 30, 60, and 120 minutes. Subsequently, the eggs were washed and, after 180 hours of observation, the feed was added. The analysis of the chemical composition of the essential oil was performed by Gas Chromatography coupled to Mass Spectrometry. It was found that up to 180 hours of observation, the highest percentage of larval hatching occurred in eggs exposed to essential oil for 15 min (30%) and the lowest percentage in eggs exposed for 120 min ( less than 10%). After 180 hours, there was an increase in hatching in all treatments. The moisture content was 58.69%, the oil yield was 0.35%, and the main chemical constituents found were bicyclogermacrene and b-cariophylene. It was observed that the essential oil of Croton argyrophyllus, at the concentration evaluated, affects the hatching of Aedes aegypti larvae only in the absence of food.
{"title":"CHEMICAL COMPOSITION AND OVICIDA ACTIVITY OF THE ESSENTIAL OIL OF CROTON ARGYROPHYLLUS (EUPHORBIACEAE) LEAVES ABOUT AEDES AEGYPTI (DIPTERA: CULICIDAE","authors":"R. D. Costa, D. C. Silva, S. Gualberto, Paulo Sávio Damásio Da Silva, M. A. M. Costa","doi":"10.52571/ptq.v17.n36.2020.101_periodico36_pgs_85_99.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.101_periodico36_pgs_85_99.pdf","url":null,"abstract":"\u0000The control of Aedes aegypti, which transmits several arboviruses of importance to public health, has as strategies the use of synthetic insecticides, integrated with environmental control. Its control is mainly directed to the larvae and adult phases. The egg phase is difficult to control, as it has great resistance to environmental\u0000conditions. The objective of this work was to evaluate the ovicidal potential of the essential oil obtained from the leaves of Croton argyrophyllus, on Aedes aegypti, as well as to determine the moisture content, the yield, and its chemical composition. The eggs were exposed to the aqueous solution of the essential oil in 10% Tween 80,\u0000in the concentration of 12 mg mL-1, for a period of 15, 30, 60, and 120 minutes. Subsequently, the eggs were washed and, after 180 hours of observation, the feed was added. The analysis of the chemical composition of the essential oil was performed by Gas Chromatography coupled to Mass Spectrometry. It was found that up to 180 hours of observation, the highest percentage of larval hatching occurred in eggs exposed to essential oil for 15 min (30%) and the lowest percentage in eggs exposed for 120 min ( less than 10%). After 180 hours, there was an increase in hatching in all treatments. The moisture content was 58.69%, the oil yield was 0.35%, and the main chemical constituents found were bicyclogermacrene and b-cariophylene. It was observed that the essential oil of Croton argyrophyllus, at the concentration evaluated, affects the hatching of Aedes aegypti larvae only in the absence of food.","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46877740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.860_periodico36_pgs_845_855.pdf
A. Sadritdinov, V. Chernova, M. Bazunova, E. Zakharova, V. Zakharov
The relevance of the issue under investigation is conditioned by an increase of the ecological burden on the environment due to the continuous increase of plastic waste, a significant proportion of polypropylene. One solution to this problem is the involvement of recycled polypropylene to obtain plastic products based on composites filled with rice husk. It makes it possible to reduce the prime cost of finished products, regulate their physical and mechanical properties, and reduce the volume of difficult-to-decompose synthetic polymers that end up in waste. The key property of polypropylene, which changes during its filling with rice husk, is moisture absorption, which contributes to a change in the strength characteristics of the polymer composite and accelerates its aging under the influence of environmental factors. In this regard, this research aims to identify the patterns of the influence of absorbed moisture and natural aging on the physical and mechanical properties of polymer composites based on recycled polypropylene filled with rice husk. The leading approach to the study of this issue is laboratory tests on the saturation of polymer composites with water of different temperatures and duration of exposure and testing materials during long-term natural aging under the influence of environmental factors. The key factor characterizing the change in the physical and mechanical properties of materials, in this case, is the elasticity modulus, elongation, and tensile stress at the break during stretching of the prototypes. The materials of the paper are of practical value for the processing of secondary thermoplastic polymers, as well as the development of biodegradable polymer composites.
{"title":"STRENGTH CHARACTERISTICS OF POLYMER COMPOSITES BASED ON RECYCLED POLYPROPYLENE FILLED WITH RICE HUSK DURING MOISTURE ABSORPTION AND NATURAL AGIN","authors":"A. Sadritdinov, V. Chernova, M. Bazunova, E. Zakharova, V. Zakharov","doi":"10.52571/ptq.v17.n36.2020.860_periodico36_pgs_845_855.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.860_periodico36_pgs_845_855.pdf","url":null,"abstract":"\u0000The relevance of the issue under investigation is conditioned by an increase of the ecological burden on the environment due to the continuous increase of plastic waste, a significant proportion of polypropylene. One solution to this problem is the involvement of recycled polypropylene to obtain plastic products based on composites filled with rice husk. It makes it possible to reduce the prime cost of finished products, regulate their physical and mechanical properties, and reduce the volume of difficult-to-decompose synthetic polymers that end up in waste. The key property of polypropylene, which changes during its filling with rice husk, is moisture absorption, which contributes to a change in the strength characteristics of the polymer composite and accelerates its aging under the influence of environmental factors. In this regard, this research aims to identify the patterns of the influence of absorbed moisture and natural aging on the physical and mechanical properties of polymer composites based on recycled polypropylene filled with rice husk. The leading approach to the study of this issue is laboratory tests on the saturation of polymer composites with water of different temperatures and duration of exposure and testing materials during long-term natural aging under the influence of environmental factors. The key factor characterizing the change in the physical and mechanical properties of materials, in this case, is the elasticity modulus, elongation, and tensile stress at the break during stretching of the prototypes. The materials of the paper are of practical value for the processing of secondary thermoplastic polymers, as well as the development of biodegradable polymer composites.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48595131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.317_periodico36_pgs_302_314.pdf
Nurgiza F Ibrakova, G. G. Kutlugildina, Yuriy S. Zimin
Currently, the percentage of infections with invasive (parasitic) diseases is quite large; therefore, the treatment of helminthiases is an urgent problem in veterinary medicine. Parasitic worms inflict significant damage on animal husbandry, leading to the death of animals, shortage of meat, dairy products, and wool. The most common active ingredient in antihelmintics is praziquantel, which is well known as an effective broad-spectrum anthelmintic. At the same time, praziquantel has low solubility in water and a pronounced bitter taste, which represents a significant obstacle in developing liquid forms of drugs that are convenient for administration to animals. One way to solve these problems is the complexation of medicinal substances with various (natural and synthetic) compounds. In this regard, this paper aims to study the complexation of praziquantel with α-, β-, and -cyclodextrins in aqueous-alcoholic solutions. The studies were carried out by the method of ultraviolet spectroscopy. It was found that the addition of cyclodextrins to aqueous-alcoholic solutions of praziquantel leads to spectral changes indicating the presence of intermolecular interactions and complexation. The isomolar series method showed that in dilute solutions, praziquantel forms complex compounds with cyclodextrins 1:1, that is, one molecule of praziquantel falls on one molecule of α-, β- or y-cyclodextrin. The stability constants of the resulting complexes were calculated using the molar ratio method. It is shown that in the range of 296-316 K, the composition of complex compounds remains unchanged (1:1), and their stability decreases with increasing temperature. The study of the temperature dependences of the stability constants made it possible to determine the standard values of changes in the Gibbs energy, enthalpy, and complexation entropy.
{"title":"COMPLEXATION OF PRAZIQUANTEL WITH α-, β- AND y-CYCLODEXTRINS IN AQUEOUS-ALCOHOLIC SOLUTIONS","authors":"Nurgiza F Ibrakova, G. G. Kutlugildina, Yuriy S. Zimin","doi":"10.52571/ptq.v17.n36.2020.317_periodico36_pgs_302_314.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.317_periodico36_pgs_302_314.pdf","url":null,"abstract":"\u0000Currently, the percentage of infections with invasive (parasitic) diseases is quite large; therefore, the treatment of helminthiases is an urgent problem in veterinary medicine. Parasitic worms inflict significant damage on animal husbandry, leading to the death of animals, shortage of meat, dairy products, and wool. The most common active ingredient in antihelmintics is praziquantel, which is well known as an effective broad-spectrum anthelmintic. At the same time, praziquantel has low solubility in water and a pronounced bitter taste, which represents a significant obstacle in developing liquid forms of drugs that are convenient for administration to animals. One way to solve these problems is the complexation of medicinal substances with various (natural and synthetic) compounds. In this regard, this paper aims to study the complexation of praziquantel with α-, β-, and -cyclodextrins in aqueous-alcoholic solutions. The studies were carried out by the method of ultraviolet spectroscopy. It was found that the addition of cyclodextrins to aqueous-alcoholic solutions of praziquantel leads to spectral changes indicating the presence of intermolecular interactions and complexation. The isomolar series method showed that in dilute solutions, praziquantel forms complex compounds with cyclodextrins 1:1, that is, one molecule of praziquantel falls on one molecule of α-, β- or y-cyclodextrin. The stability constants of the resulting complexes were calculated using the molar ratio method. It is shown that in the range of 296-316 K, the composition of complex compounds remains unchanged (1:1), and their stability decreases with increasing temperature. The study of the temperature dependences of the stability constants made it possible to determine the standard values of changes in the Gibbs energy, enthalpy, and complexation entropy.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47537611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.88_periodico36_pgs_72_84.pdf
D. Islamgulov, R. Ismagilov, R. Alimgafarov, A. Bakirova, R. Enikeev
The economic growth and welfare of the state largely dependent on the efficiency of the agro-industrial complex, including the beet-sugar subcomplex. In Russia, including the middle CIS-Ural region, sugar beet is the main technical crop that provides raw materials for the sugar industry. More than 70 % of the area is sown in the Central and Southern Federal Districts. On the territory of the middle CIS-Ural region, sugar beet is currently cultivated on an area of more than 100,000 ha (Kornienko, 2014) The purpose of the research was to identify the productivity and technological quality patterns of new sugar beet hybrids, the influence of varietal characteristics on the content of molassigenic sub-stances, nitrogen fertilizer dosage, crop density and harvest time to obtain the highest yield of root crops with high technological qualities in the middle CIS-Ural region of Russia. Four field studies were conducted. The sugar content was determined by cold digestion with saccharimeter-polarimeter. To determine the α-amino nitrogen, the method of Stanek and Pavlas modified by Wininger and Kubadinov was used. The results showed that with an increased dose of nitrogen fertilizer, the sugar content of the root crops naturally decreased. As the crop density increased, the sugar content also increased. The highest sugar content in the root crops was revealed at a crop density of 95,000 and 110,000 plants/ha. The authors proposed recommendations to obtain the highest gross yield of purified sugar in sugar beet cultivation: for early harvesting – cultivate a sugar beet hybrid of normal-sugary type (Christella), for late harvesting – a hybrid of yielding type (HM-1820); apply nitrogen fertilizer at a dose of 160 kg of active agent/ha;cultivate sugar beet with a density of 95,000 plants per hectare; remove sugar beetroot crops with modern beet harvesters on October 10–25.
{"title":"TECHNOLOGICAL QUALITIES OF SUGAR BEETROOT CROPS UNDER THE CONDITIONS OF THE MIDDLE CIS-URAL REGION","authors":"D. Islamgulov, R. Ismagilov, R. Alimgafarov, A. Bakirova, R. Enikeev","doi":"10.52571/ptq.v17.n36.2020.88_periodico36_pgs_72_84.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.88_periodico36_pgs_72_84.pdf","url":null,"abstract":"\u0000The economic growth and welfare of the state largely dependent on the efficiency of the agro-industrial complex, including the beet-sugar subcomplex. In Russia, including the middle CIS-Ural region, sugar beet is the main technical crop that provides raw materials for the sugar industry. More than 70 % of the area is sown in the Central and Southern Federal Districts. On the territory of the middle CIS-Ural region, sugar beet is currently cultivated on an area of more than 100,000 ha (Kornienko, 2014) The purpose of the research was to identify the productivity and technological quality patterns of new sugar beet hybrids, the influence of varietal characteristics on the content of molassigenic sub-stances, nitrogen fertilizer dosage, crop density and harvest time to obtain the highest yield of root crops with high technological qualities in the middle CIS-Ural region of Russia. Four field studies were conducted. The sugar content was determined by cold digestion with saccharimeter-polarimeter. To determine the α-amino nitrogen, the method of Stanek and Pavlas modified by Wininger and Kubadinov was used. The results showed that with an increased dose of nitrogen fertilizer, the sugar content of the root crops naturally decreased. As the crop density increased, the sugar content also increased. The highest sugar content in the root crops was revealed at a crop density of 95,000 and 110,000 plants/ha. The authors proposed recommendations to obtain the highest gross yield of purified sugar in sugar beet cultivation: for early harvesting – cultivate a sugar beet hybrid of normal-sugary type (Christella), for late harvesting – a hybrid of yielding type (HM-1820); apply nitrogen fertilizer at a dose of 160 kg of active agent/ha;cultivate sugar beet with a density of 95,000 plants per hectare; remove sugar beetroot crops with modern beet harvesters on October 10–25.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45616572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.417_periodico36_pgs_402_414.pdf
V. S. Andrini, A. Matsun, T. W. Maduretno
The existence of the Covid-19 pandemic in 2020 has had a devastating impact on education. Interaction between teachers and students typically cannot be done. Based on this, innovations in education must continue to be done to improve the quality of learning. This study aimed to find out blended learning models through webinar applications and motivation on student learning outcomes in the Human Skeletal System course. The study was conducted at the Vocational High School Teachers Association of the Republic of Indonesia 2 Nganjuk Regency, East Java, Indonesia, and held in class 1 of the academic year 2019/2020 on science subjects with material on the Human Order System. The number of samples was 83 students divided into 42 experimental class students and 41 control class students. The experimental class uses the blended learning model by utilizing a webinar application, while the control class uses the help of e-modules. Data collection methods that be used are observation, questionnaires, and tests. Data analysis techniques used Two Way Anova. The results showed that (1) there were differences in student learning outcomes in the Human Skeletal System course based on the blended learning model through webinar applications, (2) there were different student learning outcomes in the Human Skeletal System course based on high learning motivation and low learning motivation, (3) there is an interaction between blended learning models through webinar applications and motivation on students’ learning outcomes in the Human Skeletal System course. The novelty of this result is the application of webinars in the learning process and outcomes in the form of the holographic learning media products developed on the human skeletal system. Through holographic media, the material looks more real and resembles its original form. Students can learn skeletal systems through holographic images from a variety of different perspectives. Students are more motivated through projects given by teachers because the projects provided are engaging and able to improve skills. Students can study material both in terms of physical and biological sciences.
{"title":"IMPLEMENTATION OF WEBINARS IN BLENDED LEARNING MODELS TO IMPROVE MOTIVATION AND LEARNING OUTCOMES OF THE STUDY OF HUMAN SKELETAL SYSTEM","authors":"V. S. Andrini, A. Matsun, T. W. Maduretno","doi":"10.52571/ptq.v17.n36.2020.417_periodico36_pgs_402_414.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.417_periodico36_pgs_402_414.pdf","url":null,"abstract":"\u0000The existence of the Covid-19 pandemic in 2020 has had a devastating impact on education. Interaction between teachers and students typically cannot be done. Based on this, innovations in education must continue to be done to improve the quality of learning. This study aimed to find out blended learning models through webinar applications and motivation on student learning outcomes in the Human Skeletal System course. The study was conducted at the Vocational High School Teachers Association of the Republic of Indonesia 2 Nganjuk Regency, East Java, Indonesia, and held in class 1 of the academic year 2019/2020 on science subjects with material on the Human Order System. The number of samples was 83 students divided into 42 experimental class students and 41 control class students. The experimental class uses the blended learning model by utilizing a webinar application, while the control class uses the help of e-modules. Data collection methods that be used are observation, questionnaires, and tests. Data analysis techniques used Two Way Anova. The results showed that (1) there were differences in student learning outcomes in the Human Skeletal System course based on the blended learning model through webinar applications, (2) there were different student learning outcomes in the Human Skeletal System course based on high learning motivation and low learning motivation, (3) there is an interaction between blended learning models through webinar applications and motivation on students’ learning outcomes in the Human Skeletal System course. The novelty of this result is the application of webinars in the learning process and outcomes in the form of the holographic learning media products developed on the human skeletal system. Through holographic media, the material looks more real and resembles its original form. Students can learn skeletal systems through holographic images from a variety of different perspectives. Students are more motivated through projects given by teachers because the projects provided are engaging and able to improve skills. Students can study material both in terms of physical and biological sciences.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44237506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.144_periodico36_pgs_128_139.pdf
Ekhlas A Alani, Mustafa S Almusawi, A. Mahdi
An interesting feature of ionizing radiation, especially Gamma and X-rays as a DNA damaging factor is the range of lesions it induces. γ-H2AX foci are documented to represent DNA double-strand breaks (DSBs) as a biomarker for radiation-induced damage. Study design 42 adult male mice Albino BALB/c, had been divided randomly into 6 groups of seven mice each. Group 1 received a standard saline solution untreated also, do not expose to radiation. Group 2 mice received vitamin C (VC) (200 mg/kg.day) intra-peritoneal (i.p.) injected for 8 days without radiation. Group 3 control was exposed to γ-radiation. Group 4 control was exposed to X-ray radiation. Group 5 mice had been administrated with vitamin C in the identical dose of group 2 for 8 days, then exposed to (4 Gy) of γ-ray. Group 6 was administrated with vitamin dose in the same above and the same period, then exposed to (4 Gy) of X-ray. All groups had been sacrificed by cervical dislocation at (1, 3, and 24 h). Post radiation testis mice tissues were collected. A significant difference (P 0.05) between the group of vitamin C and with a control group exposed to both (γ, X-rays) in foci forming, but there is no significant difference (P 0.05) between γ and X- rays for the control and vitamin C groups. The results demonstrate that vitamin C is a good radioprotective agent for testis mice tissues; the effect of (γ and X-rays) had almost the same results on the mice testicle tissues with the same dose.
{"title":"EVALUATION THE ROLE OF VITAMIN C AS A RADIATION PROTECTIVE AGENT USING γ-H2AX FOR SIGNALING OF DNA DAMAGE ON IRRADIATED MICE TESTIS","authors":"Ekhlas A Alani, Mustafa S Almusawi, A. Mahdi","doi":"10.52571/ptq.v17.n36.2020.144_periodico36_pgs_128_139.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.144_periodico36_pgs_128_139.pdf","url":null,"abstract":"\u0000An interesting feature of ionizing radiation, especially Gamma and X-rays as a DNA damaging factor is the range of lesions it induces. γ-H2AX foci are documented to represent DNA double-strand breaks (DSBs) as a biomarker for radiation-induced damage. Study design 42 adult male mice Albino BALB/c, had been divided randomly into 6 groups of seven mice each. Group 1 received a standard saline solution untreated also, do not expose to radiation. Group 2 mice received vitamin C (VC) (200 mg/kg.day) intra-peritoneal (i.p.) injected for 8 days without radiation. Group 3 control was exposed to γ-radiation. Group 4 control was exposed to X-ray radiation. Group 5 mice had been administrated with vitamin C in the identical dose of group 2 for 8 days, then exposed to (4 Gy) of γ-ray. Group 6 was administrated with vitamin dose in the same above and the same period, then exposed to (4 Gy) of X-ray. All groups had been sacrificed by cervical dislocation at (1, 3, and 24 h). Post radiation testis mice tissues were collected. A significant difference (P 0.05) between the group of vitamin C and with a control group exposed to both (γ, X-rays) in foci forming, but there is no significant difference (P 0.05) between γ and X- rays for the control and vitamin C groups. The results demonstrate that vitamin C is a good radioprotective agent for testis mice tissues; the effect of (γ and X-rays) had almost the same results on the mice testicle tissues with the same dose.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47572292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-20DOI: 10.52571/ptq.v17.n36.2020.187_periodico36_pgs_171_185.pdf
A. Nurwidiyanto, Kaijun Zhang
Mathematics is seen as a science of pattern. Identifying and using patterns is the essence of mathematical thinking for children to improve algebraic thinking from their early schooling. The pattern is an arrangement of objects that have regularities or properties that can be generalized. Therefore, it is essential to know the strategies used by students in generalizing patterns and how students think in these processes. This study is descriptive research with a mixed quantitative-qualitative approach that aimed to investigate student’s algebraic thinking using various strategies to generalize the visual pattern. An instrument about the linear geometric growing pattern was administrated to 75 upper primary school students (grades 5-6) and 81 lower secondary students (grades 7-8) in two private schools in Semarang, Indonesia. The results showed that students used different pattern generalization strategies. The student generally preferred recursive, chunking, and functional approaches in each generalization task, whereas few used counting from drawing strategies to generalize patterns. The use of the recursive strategy decreased, whereas the chunking strategy and the functional strategy increased across grades 5-8 for the problems. The results also showed the student who used the recursive and chunking strategy preferred to change visual patterns into rows of numbers. Hence, they adopt a numeric approach by finding the common difference of visible pattern in each step.
{"title":"STRATEGIES OF PATTERN GENERALIZATION FOR ENHANCING STUDENTS’ ALGEBRAIC THINKING","authors":"A. Nurwidiyanto, Kaijun Zhang","doi":"10.52571/ptq.v17.n36.2020.187_periodico36_pgs_171_185.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.187_periodico36_pgs_171_185.pdf","url":null,"abstract":"\u0000Mathematics is seen as a science of pattern. Identifying and using patterns is the essence of mathematical thinking for children to improve algebraic thinking from their early schooling. The pattern is an arrangement of objects that have regularities or properties that can be generalized. Therefore, it is essential to know the strategies used by students in generalizing patterns and how students think in these processes. This study is descriptive research with a mixed quantitative-qualitative approach that aimed to investigate student’s algebraic thinking using various strategies to generalize the visual pattern. An instrument about the linear geometric growing pattern was administrated to 75 upper primary school students (grades 5-6) and 81 lower secondary students (grades 7-8) in two private schools in Semarang, Indonesia. The results showed that students used different pattern generalization strategies. The student generally preferred recursive, chunking, and functional approaches in each generalization task, whereas few used counting from drawing strategies to generalize patterns. The use of the recursive strategy decreased, whereas the chunking strategy and the functional strategy increased across grades 5-8 for the problems. The results also showed the student who used the recursive and chunking strategy preferred to change visual patterns into rows of numbers. Hence, they adopt a numeric approach by finding the common difference of visible pattern in each step.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48143209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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