Electricity in Indonesia uses fossil fuels as an energy source. If fossil fuels run out, we will lose our largest source of electrical energy. Therefore, we need a way to reduce dependence on fossil fuels by making good use of renewable energy as a source of electrical energy. One of them is Green Technology Electricity with the utilization of sewage water to convert chemical energy into electrical energy. This study aims to determine the potential of sewage water assisted by Cu/Mg electrodes as a source of street lighting, manufacturing, and testing methods, and the effect of optimizing sewage water on electrical performance as street lighting. Lack of lighting in residential areas is also a supporting factor in this research. The stages used are preparation, incubation, construction assembly, research, and strength testing. Based on research, the sewage water from Perum Pesona Permata Gading can be used as street lighting with the highest potential difference and current strength being 4.4 V and 0.55 A for each 50 mL of the sewage water.
{"title":"Optimizing sewage water of Perum Pesona Permata Gading with the assistance of Cu/Mg electrodes as public street lighting based on green technology electricity","authors":"Deni Ainur Rokhim, Diana Novel Smith, Alfredo Radinal Mukhtar, Azzahra Zafira Putri Koto","doi":"10.26850/1678-4618.eq.v49.2024.e1496","DOIUrl":"https://doi.org/10.26850/1678-4618.eq.v49.2024.e1496","url":null,"abstract":"Electricity in Indonesia uses fossil fuels as an energy source. If fossil fuels run out, we will lose our largest source of electrical energy. Therefore, we need a way to reduce dependence on fossil fuels by making good use of renewable energy as a source of electrical energy. One of them is Green Technology Electricity with the utilization of sewage water to convert chemical energy into electrical energy. This study aims to determine the potential of sewage water assisted by Cu/Mg electrodes as a source of street lighting, manufacturing, and testing methods, and the effect of optimizing sewage water on electrical performance as street lighting. Lack of lighting in residential areas is also a supporting factor in this research. The stages used are preparation, incubation, construction assembly, research, and strength testing. Based on research, the sewage water from Perum Pesona Permata Gading can be used as street lighting with the highest potential difference and current strength being 4.4 V and 0.55 A for each 50 mL of the sewage water.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141114496","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 : 2024-05-20DOI: 10.26850/1678-4618.eq.v49.2024.e1505
Francisco Wagner De Sousa, Maxwell Lima Maia, Wendy Fernandes Lavigne Quintanilha, D. R. Cassiano, B. V. Bertoncini, Ronaldo Ferreira do Nascimento, Cleidiane Silva Oliveira, Jefferson Pereira Ribeiro
The increase in the fleet of motor vehicles circulating in urban centers is one of the main generators of gaseous pollutants harmful to human health and the environment. Pollutants can be economically and effectively monitored through passive sampling. This study aims to estimate NO2 levels on roads of Fortaleza city /CE using the passive sampling method. 12 campaigns covered the rainy (March-June) and the dry (July-November) seasons in 2019. The seasonal averages of NO2 in the rainy season were higher than the dry one, and Almirante Rubim Street showed the greatest difference in the averages: 26.6 µg m-3 in the rainy and 19.3 µg m-3 in the dry season. The principal component analysis applied to the averages of NO2 concentration in the rainy and dry seasons, vehicle traffic and Height of the road/width ratio indicated that components 1, 2 and 3 explain 94.4% of the studied cases. Passive sampling proved to be efficient, contributing to the production of unpublished data about NO2 levels in streets of Fortaleza/Ceará/Brazil from mobile sources.
{"title":"Estimation of nitrogen dioxide levels on streets from Fortaleza Brazil using passive sampling and multivariate analysis","authors":"Francisco Wagner De Sousa, Maxwell Lima Maia, Wendy Fernandes Lavigne Quintanilha, D. R. Cassiano, B. V. Bertoncini, Ronaldo Ferreira do Nascimento, Cleidiane Silva Oliveira, Jefferson Pereira Ribeiro","doi":"10.26850/1678-4618.eq.v49.2024.e1505","DOIUrl":"https://doi.org/10.26850/1678-4618.eq.v49.2024.e1505","url":null,"abstract":"The increase in the fleet of motor vehicles circulating in urban centers is one of the main generators of gaseous pollutants harmful to human health and the environment. Pollutants can be economically and effectively monitored through passive sampling. This study aims to estimate NO2 levels on roads of Fortaleza city /CE using the passive sampling method. 12 campaigns covered the rainy (March-June) and the dry (July-November) seasons in 2019. The seasonal averages of NO2 in the rainy season were higher than the dry one, and Almirante Rubim Street showed the greatest difference in the averages: 26.6 µg m-3 in the rainy and 19.3 µg m-3 in the dry season. The principal component analysis applied to the averages of NO2 concentration in the rainy and dry seasons, vehicle traffic and Height of the road/width ratio indicated that components 1, 2 and 3 explain 94.4% of the studied cases. Passive sampling proved to be efficient, contributing to the production of unpublished data about NO2 levels in streets of Fortaleza/Ceará/Brazil from mobile sources.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141121974","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 : 2024-02-16DOI: 10.26850/1678-4618.eq.v49.2024.e1491
Deni Ainur Rokhim, M.Roy Asrori, H. W. Wijaya
[Co(NH3)3(NO2)3] is an octahedral complex compound that can have several isomers. The complex compound has magnetic properties. Its stability has been explained. It can be easily synthesized and is known as a bioinorganic synthesis reagent, oxidant compound and base hydrolysis.
{"title":"Complex compound of trinitrotriamminecobalt(III): in theoretical studies","authors":"Deni Ainur Rokhim, M.Roy Asrori, H. W. Wijaya","doi":"10.26850/1678-4618.eq.v49.2024.e1491","DOIUrl":"https://doi.org/10.26850/1678-4618.eq.v49.2024.e1491","url":null,"abstract":"[Co(NH3)3(NO2)3] is an octahedral complex compound that can have several isomers. The complex compound has magnetic properties. Its stability has been explained. It can be easily synthesized and is known as a bioinorganic synthesis reagent, oxidant compound and base hydrolysis.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140453872","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 : 2024-01-18DOI: 10.26850/1678-4618eq.v49.2024.e1512
William Ojoniko Anthony, E. O. Okpala, Kehinde Gabriel Obiyenwa, Godfrey Okechukwu Eneogwe, B. Semire
Acacia nilotica, (Fabaceae), is valued for its medicinal properties. We examine the antiproliferative properties of the aqueous fruit extract of A. nilotica. Aqueous extract from Acacia has been associated with potential anticancer effects in fruits and vegetables through screening, antiproliferative, and molecular docking evaluation. Phytochemical screening reveals the presence of alkaloids, saponins, tannins, flavonoids, steroids, and carbohydrates. The extracts showed significant antiproliferative effects at eight concentrations (8�50 mg�mL�1) examined in comparison to the standard (methotrexate). When compared to Sorghum bicolor seed radicles treated with methotrexate at 48, 72, and 96 h, 50 mg�mL�1 extract significantly inhibited the generation of seed radicals, with potent inhibitions of 87.06, 83.48, and 81.45%. Analysis of molecular docking results showed that [(2R,3S)-2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-3,4-dihydro-2H-chromen-7-yl]3,4,5-trihydroxybenzoate (D21), (5R,9R,10R,13S,14S,17S)-17-[(2S,4R)-4-[(2S)-3,3-dimethyloxiran-2-yl]-4-hydroxybutan-2-yl]-4,4,10,13,14-pentamethyl-1,2,5,6,9,11,12,15,16,17-decahydrocyclopenta[a]phenanthren-3-one (D28) and [(2R,3S)-2-(3,4-dihydroxyphenyl)-3,7-dihydroxy-3,4-dihydro-2H-chromen-5-yl] 3,4,5-trihydroxybenzoate (D29) have strong tendency to inhibit dihydrofolate reductase (1VDR), capase-9 (6J15) and Mycobacterium tuberculosis (Mtb) (6J17) better than methotrexate and azacitidine, known antiproliferative drugs. These findings support the use of A. nilotica in traditional medicine for the treatment of tuberculosis and cancer.
金合欢（豆科）因其药用价值而备受重视。我们研究了金合欢果实水提取物的抗增殖特性。通过筛选、抗增殖和分子对接评估，相思树的水提取物与水果和蔬菜的潜在抗癌作用有关。植物化学筛选显示了生物碱、皂苷、单宁、黄酮类、类固醇和碳水化合物的存在。与标准物质（甲氨蝶呤）相比，提取物在八个浓度（8.50 mg.mL.1）下均显示出明显的抗增殖作用。与甲氨蝶呤处理48、72和96小时后的高粱双色种子辐射体相比，50 mg.mL.1提取物可明显抑制种子自由基的生成，抑制率分别为87.06%、83.48%和81.45%。分子对接分析结果显示，[(2R,3S)-2-(3,4-二羟基苯基)-3,5-二羟基-3,4-二氢-2H-苯并吡喃-7-基]3,4,5-三羟基苯甲酸酯（D21）、(5R,9R,10R,13S,14S、17S)-17-[(2S,4R)-4-[(2S)-3,3-dimethyloxiran-2-yl]-4-hydroxybutan-2-yl]-4,4,10,13,14-pentamethyl-1,2,5,6,9,11,12,15,16,17-decahydrocyclopenta[a]phenanthren-3-one (D28) and [(2R,3S）-2-（3,4-二羟基苯基）-3,7-二羟基-3,4-二氢-2H-苯并吡喃-5-基] 3,4,5-三羟基苯甲酸酯（D29）对二氢叶酸还原酶（1VDR）、capase-9（6J15）和结核分枝杆菌（Mtb）（6J17）的抑制作用比已知的抗增殖药物甲氨蝶呤和阿扎胞苷更强。这些发现支持在传统医学中使用 A. nilotica 治疗结核病和癌症。
{"title":"Phytochemical screening, antiproliferative evaluation, and molecular docking studies of Acacia nilotica fruit from Nigeria","authors":"William Ojoniko Anthony, E. O. Okpala, Kehinde Gabriel Obiyenwa, Godfrey Okechukwu Eneogwe, B. Semire","doi":"10.26850/1678-4618eq.v49.2024.e1512","DOIUrl":"https://doi.org/10.26850/1678-4618eq.v49.2024.e1512","url":null,"abstract":"Acacia nilotica, (Fabaceae), is valued for its medicinal properties. We examine the antiproliferative properties of the aqueous fruit extract of A. nilotica. Aqueous extract from Acacia has been associated with potential anticancer effects in fruits and vegetables through screening, antiproliferative, and molecular docking evaluation. Phytochemical screening reveals the presence of alkaloids, saponins, tannins, flavonoids, steroids, and carbohydrates. The extracts showed significant antiproliferative effects at eight concentrations (8�50 mg�mL�1) examined in comparison to the standard (methotrexate). When compared to Sorghum bicolor seed radicles treated with methotrexate at 48, 72, and 96 h, 50 mg�mL�1 extract significantly inhibited the generation of seed radicals, with potent inhibitions of 87.06, 83.48, and 81.45%. Analysis of molecular docking results showed that [(2R,3S)-2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-3,4-dihydro-2H-chromen-7-yl]3,4,5-trihydroxybenzoate (D21), (5R,9R,10R,13S,14S,17S)-17-[(2S,4R)-4-[(2S)-3,3-dimethyloxiran-2-yl]-4-hydroxybutan-2-yl]-4,4,10,13,14-pentamethyl-1,2,5,6,9,11,12,15,16,17-decahydrocyclopenta[a]phenanthren-3-one (D28) and [(2R,3S)-2-(3,4-dihydroxyphenyl)-3,7-dihydroxy-3,4-dihydro-2H-chromen-5-yl] 3,4,5-trihydroxybenzoate (D29) have strong tendency to inhibit dihydrofolate reductase (1VDR), capase-9 (6J15) and Mycobacterium tuberculosis (Mtb) (6J17) better than methotrexate and azacitidine, known antiproliferative drugs. These findings support the use of A. nilotica in traditional medicine for the treatment of tuberculosis and cancer.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140504244","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 : 2024-01-03DOI: 10.26850/1678-4618.eq.v49.2024.e1492
O. A. Kolawole, Olujinmi Faith Eniola, Akintelu Sunday Adewale, Adetuyi Babatunde, Ogunlana Olubanke, Semire Banjo, A. E. Temitope, A. C. Olufunke, Babalola Jonathan Oyebamiji, Olawoye Bolanle Mary, Aworinde Juliana Oluwasayo
The use of medicinal plants as an alternative mean of treating various diseases has drawn the attention of several researchers. The desire to find lasting solutions to epilepsy among humans increases every day. Thus, this work was aimed at investigating the potential capacity of the studied phytochemicals in Alsophila spinulosa against human 4-aminobutyrate-aminotransferase as well as to predict the nonbonding interactions involved in the studied complexes. In this work, ten compounds with biological activities were selected and studied using molecular docking method. The molecules selected obtained from A. spinulosa leaves were optimized and various descriptors that described the anti-4-aminobutyrate-aminotransferase features were obtained. More so, 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-(((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-4H-chromen-4-one (compound 9) with highest binding affinity proved to have greater strength to inhibit 4-aminobutyrate-aminotransferase thereby downregulating epilepsy than other studied compounds and the reference drug (clobazam). The ADMET features of both compound 9 and clobazam were explored and reported.
{"title":"Predicting the biological activity of selected phytochemicals in Alsophila spinulosa leaves against 4-aminobutyrate-aminotransferase: A potential antiepilepsy agents","authors":"O. A. Kolawole, Olujinmi Faith Eniola, Akintelu Sunday Adewale, Adetuyi Babatunde, Ogunlana Olubanke, Semire Banjo, A. E. Temitope, A. C. Olufunke, Babalola Jonathan Oyebamiji, Olawoye Bolanle Mary, Aworinde Juliana Oluwasayo","doi":"10.26850/1678-4618.eq.v49.2024.e1492","DOIUrl":"https://doi.org/10.26850/1678-4618.eq.v49.2024.e1492","url":null,"abstract":"The use of medicinal plants as an alternative mean of treating various diseases has drawn the attention of several researchers. The desire to find lasting solutions to epilepsy among humans increases every day. Thus, this work was aimed at investigating the potential capacity of the studied phytochemicals in Alsophila spinulosa against human 4-aminobutyrate-aminotransferase as well as to predict the nonbonding interactions involved in the studied complexes. In this work, ten compounds with biological activities were selected and studied using molecular docking method. The molecules selected obtained from A. spinulosa leaves were optimized and various descriptors that described the anti-4-aminobutyrate-aminotransferase features were obtained. More so, 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-(((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-4H-chromen-4-one (compound 9) with highest binding affinity proved to have greater strength to inhibit 4-aminobutyrate-aminotransferase thereby downregulating epilepsy than other studied compounds and the reference drug (clobazam). The ADMET features of both compound 9 and clobazam were explored and reported.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514461","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 : 2023-10-03DOI: 10.26850/1678-4618eqj.v48.4.2023.p27-36
C. Cardoso, E. Caramão, Thiago Luis Aguayo de Castro, E. Simionatto
The leaves of Mangifera indica L. have been used in the medical system of India to treat diseases such as asthma, dysentery, cough, leucorrhea, jaundice, pain, and malaria. The analysis of different varieties of the same species is intended to determine if the compounds have a differential distribution. The present study investigates the volatile compounds from the leaves of two M. indica varieties extracted by hydrodistillation and analyzed by comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC�GC/TOFMS). The number of compounds identified by GC�GC/TOFMS was superior to that obtained by gas chromatography/mass spectrometry (GC/MS) for the same variety of M. indica. This study demonstrates the applicability of the GC�GC/TOFMS for the comprehensive profiling of essential oils from M. indica, in which 125 and 95 compounds were identified in the varieties �espada� and �cora��o de boi�, respectively. These results show that the compositions of the two analyzed essential oils present differences concerning the GC�GC/TOFMS and conventional chromatography technique, the GC/MS.
印度医学系统一直使用 Mangifera indica L. 的叶子治疗哮喘、痢疾、咳嗽、白带、黄疸、疼痛和疟疾等疾病。对同一物种的不同品种进行分析是为了确定化合物是否有不同的分布。本研究调查了通过水蒸馏法提取的两个籼稻品种叶片中的挥发性化合物，并采用二维气相色谱-飞行时间质谱联用仪（GC�GC/TOFMS）进行了综合分析。与气相色谱/质谱法（GC/MS）相比，GC�GC/TOFMS 法鉴定的化合物数量更多。这项研究证明了 GC�GC/TOFMS适用于对籼米香精油进行全面分析，在 "espada "和 "cora�o de boi�"品种中分别鉴定出了125和95种化合物。这些结果表明，GC�GC/TOFMS 和传统色谱技术 GC/MS 所分析的两种精油成分存在差异。
{"title":"Variation in the chemical composition of essential oils from Mangifera indica L. leaves by comprehensive two-dimensional gas chromatography","authors":"C. Cardoso, E. Caramão, Thiago Luis Aguayo de Castro, E. Simionatto","doi":"10.26850/1678-4618eqj.v48.4.2023.p27-36","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v48.4.2023.p27-36","url":null,"abstract":"The leaves of Mangifera indica L. have been used in the medical system of India to treat diseases such as asthma, dysentery, cough, leucorrhea, jaundice, pain, and malaria. The analysis of different varieties of the same species is intended to determine if the compounds have a differential distribution. The present study investigates the volatile compounds from the leaves of two M. indica varieties extracted by hydrodistillation and analyzed by comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC�GC/TOFMS). The number of compounds identified by GC�GC/TOFMS was superior to that obtained by gas chromatography/mass spectrometry (GC/MS) for the same variety of M. indica. This study demonstrates the applicability of the GC�GC/TOFMS for the comprehensive profiling of essential oils from M. indica, in which 125 and 95 compounds were identified in the varieties �espada� and �cora��o de boi�, respectively. These results show that the compositions of the two analyzed essential oils present differences concerning the GC�GC/TOFMS and conventional chromatography technique, the GC/MS.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139324051","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 : 2023-10-03DOI: 10.26850/1678-4618eqj.v48.4.2023.p17-26
H. Widarti, Allykha Baharsyah, Deni Ainur Rokhim, A. B. Syafruddin
Chemistry is still considered a difficult subject for students due to a lack of motivation and understanding. Implementing a problem-based learning (PBL) model with the media of Instagram can help students expand their critical thinking and problem-solving skills. To this end, 20 empirical research articles from inside and outside Indonesia were examined using the bibliometric analysis method to find research gaps and novelties as a basis for future research. The review shows various difficulties faced by students in studying chemistry. Instagram-based chemistry learning can help the learning process to be fun, innovative, easy to understand and not boring. Applying the PBL model to learning can help students develop critical thinking and problem-solving skills. The results of this analysis offer perspectives and innovations for teachers to deal with the problems faced by students, presenting innovations in learning, such as the use of Instagram and PBL models.
{"title":"Is the use of the Problem-Based Learning Model through Instagram effective? A Review","authors":"H. Widarti, Allykha Baharsyah, Deni Ainur Rokhim, A. B. Syafruddin","doi":"10.26850/1678-4618eqj.v48.4.2023.p17-26","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v48.4.2023.p17-26","url":null,"abstract":"Chemistry is still considered a difficult subject for students due to a lack of motivation and understanding. Implementing a problem-based learning (PBL) model with the media of Instagram can help students expand their critical thinking and problem-solving skills. To this end, 20 empirical research articles from inside and outside Indonesia were examined using the bibliometric analysis method to find research gaps and novelties as a basis for future research. The review shows various difficulties faced by students in studying chemistry. Instagram-based chemistry learning can help the learning process to be fun, innovative, easy to understand and not boring. Applying the PBL model to learning can help students develop critical thinking and problem-solving skills. The results of this analysis offer perspectives and innovations for teachers to deal with the problems faced by students, presenting innovations in learning, such as the use of Instagram and PBL models.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139324002","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 : 2023-10-03DOI: 10.26850/1678-4618eqj.v48.4.2023.p37-47
A.J. Ferreira Gadelha, Clarice Oliveira da Rocha, José Germano Véras Neto, Mirelly Alexandre Gomes
Multivariate analysis techniques are powerful tools in the study of groundwater quality, providing an expanded view of quality parameters. This work presents a multivariate analysis of groundwater quality in the city of Sousa, Paraíba state, through the techniques of principal component analysis (PCA) and hierarchical cluster analysis (HCA). Samples from 13 tubular wells were collected in different districts of the city of Sousa, during the rainy and dry seasons. For these samples, 11 parameters were analyzed: hydrogenic potential (pH), total dissolved solids, total alkalinity, carbonates, bicarbonates, total hardness, magnesium, calcium, sodium, potassium, and chlorides. PC1, PC2, PC3 and PC4 explain 87.48% of the total variance of the data. The PCA shows that there was a change in patterns between the analyzed periods. The correlation matrix corroborates the PCA data, showing the relationships between the physical-chemical variables evaluated. The HCA confirmed the correlations between the samples, making it possible to assess the degree of similarity between the composition of the wells and between the parameters evaluated.
{"title":"Multivariate statistical analysis of physicochemical parameters of groundwater quality using PCA and HCA techniques","authors":"A.J. Ferreira Gadelha, Clarice Oliveira da Rocha, José Germano Véras Neto, Mirelly Alexandre Gomes","doi":"10.26850/1678-4618eqj.v48.4.2023.p37-47","DOIUrl":"https://doi.org/10.26850/1678-4618eqj.v48.4.2023.p37-47","url":null,"abstract":"Multivariate analysis techniques are powerful tools in the study of groundwater quality, providing an expanded view of quality parameters. This work presents a multivariate analysis of groundwater quality in the city of Sousa, Paraíba state, through the techniques of principal component analysis (PCA) and hierarchical cluster analysis (HCA). Samples from 13 tubular wells were collected in different districts of the city of Sousa, during the rainy and dry seasons. For these samples, 11 parameters were analyzed: hydrogenic potential (pH), total dissolved solids, total alkalinity, carbonates, bicarbonates, total hardness, magnesium, calcium, sodium, potassium, and chlorides. PC1, PC2, PC3 and PC4 explain 87.48% of the total variance of the data. The PCA shows that there was a change in patterns between the analyzed periods. The correlation matrix corroborates the PCA data, showing the relationships between the physical-chemical variables evaluated. The HCA confirmed the correlations between the samples, making it possible to assess the degree of similarity between the composition of the wells and between the parameters evaluated.","PeriodicalId":35894,"journal":{"name":"Ecletica Quimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139323885","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 : 2023-10-03DOI: 10.26850/1678-4618eqj.v48.4.2023.p48-56
Havdih Castro Valdiviezo, Mario Adelfo Batista Zaldívar
Didactic games for science teaching contribute to student learning and break with traditional teaching models. The objective of this study was to implement a didactic guide with scientific recreations to favor the learning of the periodic table in students with incomplete schooling in the 2022�2023 school year. For this purpose, an experimental, field and explanatory research was used. A population study was carried out with 60 students of the first year of high school of the �Velasco Ibarra� Fiscal Educational Unit. The main theoretical and empirical methods were used, as well as descriptive and inferential statistics for data processing, analysis and interpretation. A didactic guide with scientific recreations was elaborated to favor the learning of the periodic table in students with unfinished schooling, which was applied to the students of the �Velasco Ibarra� Fiscal Educational Unit, in the 2022�2023 school year. It was corroborated that the didactic guide with scientific recreations applied significantly improved the students� learning of the periodic table.
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