Periodico Tche Quimica最新文献

{"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}

{"title":"DEVELOPMENT OF SPECIAL CHEMISTRY SKILLS IN THE UNIVERSITY VOCATIONAL TRAINING SYSTEM OF THE STUDENTS","authors":"N. N. Maslennikova, I. Gibadulina, E. A. Gafiyatullina","doi":"10.52571/ptq.v17.n36.2020.1142_periodico36_pgs_1127_1147.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.1142_periodico36_pgs_1127_1147.pdf","url":null,"abstract":"\u0000Preparing students for work in the field of education contributes to the development of school education. The basis for teaching students is made up of techniques, methods, and forms of learning by practical activity and the implementation of professional actions. The use of information and communication technology (ICT) in higher education contributes to the disclosure, preservation, and development of individual interests; the motivation; the desire for self-improvement and self-realization of students; ensuring the complexity of studying the phenomena of reality, the inextricability of the relationship between science, technology, the humanities, and art; a constant dynamic update of the content, means, forms, and methods of training and education. This study aimed to identify the level of future chemistry teachers through ICT competence development. A survey was conducted among 24 teachers of general professional and subject-vocational training, who taught “Chemical Technology” to their students. The questionnaire was targeted; the questionnaires were used both in electronic format (Google form) and in print. The article shows how information competence for future chemistry teachers is developed. The practical significance of the study is determined by the need to match the level of school education with modern technological trends. It is shown that there is a necessity for the motivation of students in scientific activity. It was established that the acquisition of competencies and the experience in open training systems, according to all respondents, is a prerequisite for the implementation of further effective educational, cognitive, and professional activities. The ascertaining stage of the pedagogical experiment established the need to choose and introduce the disciplines of mobile, computer, and cloud technologies into the curriculum for solving professionally-oriented problems. The novelty of the study is determined by the necessity to increase the competence of the pedagogical university students in training how to teach chemical disciplines.\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":"42064852","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}

{"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}

{"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}

{"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}

{"title":"ERROR ESTIMATION OF THE ALGORITHM FOR THE PHASE SHIFT DEFINITION OF HARMONIC SIGNALS IN THE TIMELESS THAN THE SIGNAL PERIOD USING STOCHASTIC SAMPLING","authors":"I. Zaitseva","doi":"10.52571/ptq.v17.n36.2020.229_periodico36_pgs_213_222.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.229_periodico36_pgs_213_222.pdf","url":null,"abstract":"\u0000Determining the parameters of a harmonic signal is one of the most common types of measurements in radio engineering, communication engineering, electronics and automation systems. The research and development of new methods for measuring the harmonic signal parameters are relevant. This work studied algorithm errors for determining the phase shift of harmonic signals using stochastic sampling. The relevance of this study is dictated by increasing requirements for the accuracy and speed of measuring equipment, the reduction of time it takes to decide on the presence of a signal while searching for it, that make it necessary to use statistically optimal methods for measuring signal parameters. The work aimed to develop an algorithm and estimate its errors for the possibility of practical implementation of the algorithm for processing infra-lowfrequency radio signals during stochastic sampling. According to the uniform distribution law, the instantaneous values in each sample of the signals under investigation are based on stochastic sampling in time. Mathematical modeling of algorithm errors for determining the phase shift of signals with harmonics, and depending on harmonics compared to the first (main) harmonic of the signal under investigation during the sampling by real analog-to-digital converters have been carried out. The obtained values of the algorithm errors for determining the phase shift of the main harmonic are within an acceptable range (30%); at harmonics amplitudes (up to the 3rd harmonic) within 20%. The computing experiment results for estimating the algorithm errors confirm the possibility of obtaining high accuracy in determining the phase shift of harmonic signals. This algorithm can be used for processing infra-low-frequency radio signals with sufficient accuracy in acoustics, hydroacoustics, seismic acoustics, underwater, and underground communication.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70710136","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}

{"title":"EVALUATION OF VITAMIN D3 AND ZINC LEVELS IN IRAQI CHILDREN WITH GROWTH HORMONE DEFICIENCY AND THEIR RELATION WITH OTHER BIOCHEMICAL PARAMETERS","authors":"I. Q. Falih, N. Tahir, Walaa Ahmed Al Jedda","doi":"10.52571/ptq.v17.n36.2020.491_periodico36_pgs_476_490.pdf","DOIUrl":"https://doi.org/10.52571/ptq.v17.n36.2020.491_periodico36_pgs_476_490.pdf","url":null,"abstract":"\u0000Growth hormone deficiency (GHD) is suspected in subjects with short stature (SS) and decreased growth velocity in whom other causes of low growth have been excluded. The growth hormone itself has a direct stimulatory action on the production of vitamin D3. Both vitamin D and growth hormone metabolism influences each other. Zinc level also plays an essential regulator of bone growth and potential growth pathway. A total of 50 children aging 4-12 years old with growth hormone deficiency have participated in this study. They were compared with 38 healthy children as a control group. This study was conducted during the period from September 2019 to June 2020. The patients were attending the National Diabetic Center/ AL-Mustansiriyah University, Baghdad, Iraq. Growth hormone, insulin-like growth factor-1, thyroid function test, cortisol level, vitamin D3, zinc level, fasting blood sugar, and lipid profile were measured in children with growth hormone deficiency. A nonsignificant difference was found in basal growth hormone between patients of growth hormone deficiency and control. There was a highly significant decrease in growth hormone level after 1 hour (provocation with clonidine) (p 0.001) and a significant decreased in growth hormone level after 1:30 hours (provocation with clonidine) (p 0.01) in patients of growth hormone deficiency compared to the control group. Also, it was observed a highly significant decrease (p 0.001) of insulin-like growth factor-1 levels in growth hormone deficiency patients when compared to control. It was also observed that there was a significant decrease (p 0.001) in the levels of Zn and vitamin D in patients with growth hormone deficiency compared to the control in addition to the distribution of the levels of vitamin D and Zinc have increased more in women than in men. It can be concluded that there was a highly significant decrease in vitamin D and Zn levels in patients with growth hormone deficiency compared to the control group. The deficiency of vitamin D and zinc levels may play an essential role in the pathogenesis of growing children with a growth hormone disorder.\u0000","PeriodicalId":45103,"journal":{"name":"Periodico Tche Quimica","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70710282","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}

{"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}

{"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}

{"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}