Pub Date : 2023-04-29DOI: 10.53564/akademika.v15i2.924
Riswan, Nilawati
Research on the design of information systems for the Language Training Center Tutoring Institute aims to develop a more valid and effective institutional information system for administrative management of course participants. The research procedure was carried out using a waterfall diagram model through the definition phase, namely a field trip to obtain primary data regarding the problems they faced. In the design phase, the researcher designed the database, the form of input, output and interface design, in the implementation phase, the researcher used the PHP and MySQL programming languages to implement what the researcher had designed. And in the testing phase and maintenance phase it aims to determine the level of error and the achievement of the application that has been designed. The Jambi Language Training Center (LTC) Tutoring Institute in the administrative processing of student data from registration to reporting is still done manually. This system causes the administration to be less effective and efficient. For this reason, it is necessary to develop a website-based information system processing in facing business competition in this era of globalization and also to provide excellent service to the community's needs for fast information on this institution. Researchers in designing database applications use Php and Mysql. From this research an interactive website has been produced that can facilitate course institutions in processing student data and also makes it easier for users to obtain information about this institution. This research can be developed by the following researchers in the form of an Android-based application.
{"title":"PERANCANGAN SISTEM INFORMASI LEMBAGA BIMBINGAN BELAJAR LANGUAGE TRAINING CENTER (LTC) DALAM PERSAINGAN ERA GLOBALISASI","authors":"Riswan, Nilawati","doi":"10.53564/akademika.v15i2.924","DOIUrl":"https://doi.org/10.53564/akademika.v15i2.924","url":null,"abstract":"Research on the design of information systems for the Language Training Center Tutoring Institute aims to develop a more valid and effective institutional information system for administrative management of course participants. The research procedure was carried out using a waterfall diagram model through the definition phase, namely a field trip to obtain primary data regarding the problems they faced. In the design phase, the researcher designed the database, the form of input, output and interface design, in the implementation phase, the researcher used the PHP and MySQL programming languages to implement what the researcher had designed. And in the testing phase and maintenance phase it aims to determine the level of error and the achievement of the application that has been designed. The Jambi Language Training Center (LTC) Tutoring Institute in the administrative processing of student data from registration to reporting is still done manually. This system causes the administration to be less effective and efficient. For this reason, it is necessary to develop a website-based information system processing in facing business competition in this era of globalization and also to provide excellent service to the community's needs for fast information on this institution. Researchers in designing database applications use Php and Mysql. From this research an interactive website has been produced that can facilitate course institutions in processing student data and also makes it easier for users to obtain information about this institution. This research can be developed by the following researchers in the form of an Android-based application.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83925688","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}
Monitoring the development of early childhood is very important, especially for children aged 4-6 years, because at that time it was a golden age that required more attention in order to stimulate child development to the maximum. This research is expected to be able to help educators to determine the development that occurs in students. The method used in this research is the perceptron method. The perceptron method is a simple Artificial Neural Network (ANN) method that uses a training algorithm to classify linearly, while the input data that becomes the criteria for this research are Moral Religious Values (MRV), Physical Motoric (PM), Cognitive, Social Emotional, Language, and Art. While the output of the data that has been processed is in the form of selected development indicators, this indicator is divided into three, namely Very Good Development [1 1], Evolves According to Expectations [1 0], and Begins to Develop [0 1]. After analyzing the monitoring of early childhood development by applying the perceptron method and the processing it using the Matlab R2009a application, the research concluded that the perceptron method was proven to be able to determine the target output and the actual appropriate ouput reached 68%.
{"title":"MONITORING PERKEMBANGAN ANAK USIA DINI DENGAN METODE PERCEPTRON PADA DI TK KASIH BUNDA BATANGHARI","authors":"Novhirtamely Kahar, Reny Wahyuning Astuti, Desviana Valencia","doi":"10.53564/akademika.v15i2.934","DOIUrl":"https://doi.org/10.53564/akademika.v15i2.934","url":null,"abstract":"Monitoring the development of early childhood is very important, especially for children aged 4-6 years, because at that time it was a golden age that required more attention in order to stimulate child development to the maximum. This research is expected to be able to help educators to determine the development that occurs in students. The method used in this research is the perceptron method. The perceptron method is a simple Artificial Neural Network (ANN) method that uses a training algorithm to classify linearly, while the input data that becomes the criteria for this research are Moral Religious Values (MRV), Physical Motoric (PM), Cognitive, Social Emotional, Language, and Art. While the output of the data that has been processed is in the form of selected development indicators, this indicator is divided into three, namely Very Good Development [1 1], Evolves According to Expectations [1 0], and Begins to Develop [0 1]. After analyzing the monitoring of early childhood development by applying the perceptron method and the processing it using the Matlab R2009a application, the research concluded that the perceptron method was proven to be able to determine the target output and the actual appropriate ouput reached 68%.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83361672","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 : 2023-04-28DOI: 10.53564/akademika.v15i2.922
Pariyadi, M. Ramadani
Domino Production currently in terms of public communication and promotion still uses brochures, word of mouth and viewing Instagram. This is already good, but it can be improved and reach more people who know Domino Production with a website. The ordering process that is done manually still uses a simple method, namely ordering just like that without any reports, so it is necessary to build an application that aims to facilitate ordering and reports. In the process of making and designing a photography management information system at Domino Production using the PHP programming language and using the MySql database. The research method used by researchers in preparing this practical work is to use the Waterfall method. Researchers carry out system development with design analysis, system design and Data Flow Diagrams (DFD). The system created will produce output that can display ordering data on a product ordered through a customer. With the existence of a Photography Management Information System on Web-Based Domino Production, it is hoped that it will make it easier to carry out promotions and can increase the number of orders for Photography services.
{"title":"SISTEM INFORMASI MANAJEMEN PHOTOGRAPHY PADA DOMINO PRODUCTION BERBASIS WEB","authors":"Pariyadi, M. Ramadani","doi":"10.53564/akademika.v15i2.922","DOIUrl":"https://doi.org/10.53564/akademika.v15i2.922","url":null,"abstract":"Domino Production currently in terms of public communication and promotion still uses brochures, word of mouth and viewing Instagram. This is already good, but it can be improved and reach more people who know Domino Production with a website. The ordering process that is done manually still uses a simple method, namely ordering just like that without any reports, so it is necessary to build an application that aims to facilitate ordering and reports. In the process of making and designing a photography management information system at Domino Production using the PHP programming language and using the MySql database. The research method used by researchers in preparing this practical work is to use the Waterfall method. Researchers carry out system development with design analysis, system design and Data Flow Diagrams (DFD). The system created will produce output that can display ordering data on a product ordered through a customer. With the existence of a Photography Management Information System on Web-Based Domino Production, it is hoped that it will make it easier to carry out promotions and can increase the number of orders for Photography services.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83194000","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}
Respiratory tract disease is a disease that can spread quickly in the community. Although mild, the disease is still dangerous for the very young and adults with limited cardiopulmonary function. This causes many local people to seek treatment at the Pondok Table Health Center, making doctors treat various types of diseases, especially influenza, ISPA, Faringitis and other respiratory diseases. However, in the current pandemic era, coupled with the Covid-19 Virus, it is enough for doctors to have to work extra to deal with various symptoms of the same respiratory disease. Therefore, it is necessary to apply an expert system for early diagnosis of respiratory tract disease by applying the Case Based Reasoning method. The Case-based reasoning method has the ability to provide more accurate diagnosis results, by comparing new cases and old cases using Similarty calculations, where this system will help patients to diagnose early disease, as well as provide disease information and treatment solutions. To make a diagnosis on this expert system application, input data is needed in the form of disease data, symptom data and case base data. And this application produces output data in the form of patient diagnosis reports.
{"title":"IMPLEMENTASI DAN ANALISIS METODE CASE BASED REASONING PADA DIAGNOSIS AWAL PENYAKIT SALURAN PERNAPASAN","authors":"Reny Wahyuning Astuti, Sukma Puspitorini, Prayogo Pangestu","doi":"10.53564/akademika.v15i2.928","DOIUrl":"https://doi.org/10.53564/akademika.v15i2.928","url":null,"abstract":"Respiratory tract disease is a disease that can spread quickly in the community. Although mild, the disease is still dangerous for the very young and adults with limited cardiopulmonary function. This causes many local people to seek treatment at the Pondok Table Health Center, making doctors treat various types of diseases, especially influenza, ISPA, Faringitis and other respiratory diseases. However, in the current pandemic era, coupled with the Covid-19 Virus, it is enough for doctors to have to work extra to deal with various symptoms of the same respiratory disease. Therefore, it is necessary to apply an expert system for early diagnosis of respiratory tract disease by applying the Case Based Reasoning method. The Case-based reasoning method has the ability to provide more accurate diagnosis results, by comparing new cases and old cases using Similarty calculations, where this system will help patients to diagnose early disease, as well as provide disease information and treatment solutions. To make a diagnosis on this expert system application, input data is needed in the form of disease data, symptom data and case base data. And this application produces output data in the form of patient diagnosis reports.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90412930","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 : 2023-04-27DOI: 10.53564/akademika.v15i2.920
Nilawati, Riswan, Fachri
The research aims to build a sales information system on the R&R based on the web. The system was developed using the PHP programming language using MySQL as a database. The method of data collection is done by way of interviews, observation, and coupled with a study of the library which has a connection with the problems faced. While the research method used is the descriptive qualitative research with the Waterfall model development system. From research conducted, found problems such as; 1) Manual recording is not neat, 2) not regularly structured sales transactions, and 3) Often lost transaction notes , resulting in difficulties in recording transactions and also errors in recording the end of month reports. The effort to solve this problem is by creating a web-based sales information system using MySQL
{"title":"SISTEM INFORMASI PENJUALAN MAKANAN RINGAN (SIPMAR) BERBASIS WEB PADA R & R DENGAN PHP DAN MYSQL","authors":"Nilawati, Riswan, Fachri","doi":"10.53564/akademika.v15i2.920","DOIUrl":"https://doi.org/10.53564/akademika.v15i2.920","url":null,"abstract":"The research aims to build a sales information system on the R&R based on the web. The system was developed using the PHP programming language using MySQL as a database. The method of data collection is done by way of interviews, observation, and coupled with a study of the library which has a connection with the problems faced. While the research method used is the descriptive qualitative research with the Waterfall model development system. From research conducted, found problems such as; 1) Manual recording is not neat, 2) not regularly structured sales transactions, and 3) Often lost transaction notes , resulting in difficulties in recording transactions and also errors in recording the end of month reports. The effort to solve this problem is by creating a web-based sales information system using MySQL","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79676565","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 : 2023-04-27DOI: 10.53564/akademika.v15i2.930
Sri Mulyati, Mulyadi, Messy Natalia
Warehouse is one of the supporting elements that have a vital role in a company. Therefore, a small error in data storage or stock counting, can result in paralyzing a company and sometimes even creating a company. According to the author's assessment, the data storage system and stock counting in PD. Sinar Mas (Hakasima) Jambi, is still far from being effective. This is because there are still many manual records found by the author from the PD warehouse staff. Sinar Mas (Hakashima).
仓库是支持元素之一，在公司中起着至关重要的作用。因此，数据存储或库存计数中的一个小错误可能会导致公司瘫痪，有时甚至会创建一个公司。根据笔者的评估，PD中的数据存储系统和库存盘点。金光(Hakasima)占碑，还远没有发挥作用。这是因为作者从PD仓库工作人员那里找到的手工记录还有很多。Sinar Mas (Hakashima)。
{"title":"IMPLEMENTASI SISTEM INFORMASI STOCK OPNAME WAREHOUSE PADA PD. SINAR MAS (HAKASIMA) JAMBI","authors":"Sri Mulyati, Mulyadi, Messy Natalia","doi":"10.53564/akademika.v15i2.930","DOIUrl":"https://doi.org/10.53564/akademika.v15i2.930","url":null,"abstract":"Warehouse is one of the supporting elements that have a vital role in a company. Therefore, a small error in data storage or stock counting, can result in paralyzing a company and sometimes even creating a company. According to the author's assessment, the data storage system and stock counting in PD. Sinar Mas (Hakasima) Jambi, is still far from being effective. This is because there are still many manual records found by the author from the PD warehouse staff. Sinar Mas (Hakashima).","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77171641","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 : 2023-02-28DOI: 10.22487/j24775185.2023.v12.i1.pp52-57
Abdulah Hamzah, S. Aminah, I. Said, Yuli Nurmayanti
Tin Fruits (Ficus carica Linn) are typical Middle Eastern plants that have been cultivated in Indonesia. Tin fruits are rich in minerals, especially calcium and potassium. In addition, they also contain benzaldehyde which is beneficial against cancer cells. This study aimed to determine the concentrations of calcium and potassium contained in tin fruits. Determination of calcium and potassium contents using an atomic absorption spectrophotometer (AAS). The results showed an analysis of the water content of the sample obtained was 89.065 %, ash content was 1.0165 % and biomass content was 9.9185 %. While the analysis of calcium contents at a wavelength of 422.7 nm and potassium at a wavelength of 766.5 nm respectively obtained that an average yield of calcium was 354.97 mg/100g and 752.68 mg/100g for potassium. The results of this study are expected to be able to attract the interest of the community to cultivate tin fruits, especially in Central Sulawesi.
{"title":"Analysis of Calcium (Ca) and Potassium (K) Contents in Tin Fruits (Ficus carica Linn)","authors":"Abdulah Hamzah, S. Aminah, I. Said, Yuli Nurmayanti","doi":"10.22487/j24775185.2023.v12.i1.pp52-57","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i1.pp52-57","url":null,"abstract":"Tin Fruits (Ficus carica Linn) are typical Middle Eastern plants that have been cultivated in Indonesia. Tin fruits are rich in minerals, especially calcium and potassium. In addition, they also contain benzaldehyde which is beneficial against cancer cells. This study aimed to determine the concentrations of calcium and potassium contained in tin fruits. Determination of calcium and potassium contents using an atomic absorption spectrophotometer (AAS). The results showed an analysis of the water content of the sample obtained was 89.065 %, ash content was 1.0165 % and biomass content was 9.9185 %. While the analysis of calcium contents at a wavelength of 422.7 nm and potassium at a wavelength of 766.5 nm respectively obtained that an average yield of calcium was 354.97 mg/100g and 752.68 mg/100g for potassium. The results of this study are expected to be able to attract the interest of the community to cultivate tin fruits, especially in Central Sulawesi.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77901889","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 : 2023-02-28DOI: 10.22487/j24775185.2023.v12.i1.pp39-43
Juliyanto Juliyanto, P. H. Abram
Avocado is a fruit that has a high nutritional value are beneficial for human health. In the fruit of the avocado are seeds of avocado that are still less utilization thus discarded and become waste. The content in avocado seeds can be used as an adsorbent. This research utilizes avocado seed powder (Persea americana Mill). As Metal Cu(II) Adsorbent. This study aims to determine the water content, ash content, and optimum pH of the adsorption of Cu(II) metal using avocado seed powder. Determining the concentration of Metal Cu(II) using the tool spectrophotometry Atomic Absorption (AAS). Determination of the optimum pH is done by varying the pH 2, pH 3, and pH 4. The result of this research is that the water content is 4.88% and the ash content is 1.94%. The results of the analysis of the optimum pH to adsorb Cu(II) metal is pH 4 with a percentage of metal that is absorbed by 65.515%. Based on the results of the study showed that avocado seeds can be used as adsorbents.
牛油果是一种营养价值高、对人体健康有益的水果。牛油果的果实中含有牛油果的种子，这些种子的利用率仍然较低，因此被丢弃并成为废物。牛油果种子中的含量可以作为吸附剂。本研究使用鳄梨种子粉(Persea americana Mill)。作为金属Cu(II)吸附剂。本研究旨在确定牛油果籽粉吸附铜(II)金属的含水量、灰分含量和最佳pH值。用原子吸收分光光度法测定金属Cu(II)的浓度。通过改变pH 2、pH 3和pH 4来确定最佳pH值。研究结果表明，粉煤灰的含水量为4.88%，灰分含量为1.94%。分析结果表明，吸附Cu(II)金属的最佳pH为pH 4，金属吸收率为65.515%。根据研究结果表明，鳄梨种子可以作为吸附剂。
{"title":"The Utilization of Avocado Seed Powder (Persea americana Mill) as a Metal Adsorbent of Cu(II)","authors":"Juliyanto Juliyanto, P. H. Abram","doi":"10.22487/j24775185.2023.v12.i1.pp39-43","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i1.pp39-43","url":null,"abstract":"Avocado is a fruit that has a high nutritional value are beneficial for human health. In the fruit of the avocado are seeds of avocado that are still less utilization thus discarded and become waste. The content in avocado seeds can be used as an adsorbent. This research utilizes avocado seed powder (Persea americana Mill). As Metal Cu(II) Adsorbent. This study aims to determine the water content, ash content, and optimum pH of the adsorption of Cu(II) metal using avocado seed powder. Determining the concentration of Metal Cu(II) using the tool spectrophotometry Atomic Absorption (AAS). Determination of the optimum pH is done by varying the pH 2, pH 3, and pH 4. The result of this research is that the water content is 4.88% and the ash content is 1.94%. The results of the analysis of the optimum pH to adsorb Cu(II) metal is pH 4 with a percentage of metal that is absorbed by 65.515%. Based on the results of the study showed that avocado seeds can be used as adsorbents.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73551301","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 : 2023-02-28DOI: 10.22487/j24775185.2023.v12.i1.pp58-64
Joni Tandi, Ni P. I. Riani, T. W. Handayani, M. Kanan
Robusta coffee beans (Coffea canephora Pierre ex.A.Froehner) have antioxidant, antidiabetic, and antihypertensive effects and can prevent coronary heart disease. This study aims to determine the compound content and total levels of secondary metabolites and to determine the antioxidant activity of robusta coffee bean extract. UV - Vis spectrophotometer was used to determine the total levels of secondary metabolites and antioxidant assay using DPPH reagent. The results obtained for the positive qualitative test contain secondary metabolites of alkaloids, flavonoids, saponins, and tannins and do not contain steroid compounds while for the quantitative test, the total alkaloid content is 0.1973%w/w (caffeine equivalent), flavonoids are 1.2106 % w / w (equivalent to quercetin), saponins 0.536 % w / w (equivalent to sapogenins), tannins at 9.7103 % w / w (equivalent to tannic acid). The IC50 result for the antioxidant activity of the ethanolic extract of robusta coffee beans is 55.16 µg/ml which is included in the category of strong antioxidants.
罗布斯塔咖啡豆(Coffea canephora Pierre ex.A.Froehner)具有抗氧化、抗糖尿病和抗高血压的作用，并能预防冠心病。本研究旨在测定罗布斯塔咖啡豆提取物的次生代谢产物的化合物含量和总水平，并测定其抗氧化活性。采用紫外-可见分光光度计测定总次生代谢物水平，DPPH试剂测定抗氧化能力。定性阳性检测结果中含有生物碱、黄酮类化合物、皂苷类化合物和单宁类化合物的次生代谢产物，不含类固醇化合物;定量检测结果中，总生物碱含量为0.1973%w/w(咖啡因当量)，总黄酮含量为1.2106% w/w(槲皮素当量)，皂苷含量为0.536 %w/w(皂苷元当量)，单宁含量为9.7103% w/w(单宁酸当量)。罗布斯塔咖啡豆乙醇提取物的抗氧化活性IC50值为55.16µg/ml，属于强抗氧化剂。
{"title":"Determination of Secondary Metabolites and Antioxidant Activity of Robusta Coffee Bean Ethanol Extract by UV - Vis Spectrophotometry","authors":"Joni Tandi, Ni P. I. Riani, T. W. Handayani, M. Kanan","doi":"10.22487/j24775185.2023.v12.i1.pp58-64","DOIUrl":"https://doi.org/10.22487/j24775185.2023.v12.i1.pp58-64","url":null,"abstract":"Robusta coffee beans (Coffea canephora Pierre ex.A.Froehner) have antioxidant, antidiabetic, and antihypertensive effects and can prevent coronary heart disease. This study aims to determine the compound content and total levels of secondary metabolites and to determine the antioxidant activity of robusta coffee bean extract. UV - Vis spectrophotometer was used to determine the total levels of secondary metabolites and antioxidant assay using DPPH reagent. The results obtained for the positive qualitative test contain secondary metabolites of alkaloids, flavonoids, saponins, and tannins and do not contain steroid compounds while for the quantitative test, the total alkaloid content is 0.1973%w/w (caffeine equivalent), flavonoids are 1.2106 % w / w (equivalent to quercetin), saponins 0.536 % w / w (equivalent to sapogenins), tannins at 9.7103 % w / w (equivalent to tannic acid). The IC50 result for the antioxidant activity of the ethanolic extract of robusta coffee beans is 55.16 µg/ml which is included in the category of strong antioxidants.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89671156","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 : 2023-02-28DOI: 10.22487/j24775185.2023.v12.i1.pp13-19
M. Afandy, W. B. Sediawan, M. Hidayat, D. Susanti, F. D. I. Sawali
Sorghum plants contain bioactive compounds such as phenolic compounds and proanthocyanidins. The presence of these compounds is extremely valuable for use as antioxidants in health care. This study aims to determine the total phenolic content, total proanthocyanidin content, and antioxidant activity of purified red sorghum extract using the ultrafiltration membrane method with different transmembrane pressure. At pressures of 8, 9, and 10 Bar, an ultrafiltration process was carried out using a polyethersulfone (PES) membrane with a molecular weight cut-off size of 10 kDa. The total phenolic content was determined using the Follin-Ciocalteu method and identified using UV-Vis spectrophotometry at 760 nm. Total proanthocyanidin content was measured using the acid-butanol method and then analyzed using UV-Vis spectrophotometry at 550 nm. The DPPH (2,2-diphenyl-2-picrylhydrazyl) method will be used to determine the antioxidant activity of purified red sorghum extract. The results of the measurements show that the higher the transmembrane pressure, the higher the concentration of phenolic and proanthocyanidins content, and that the purified red sorghum extract has a high antioxidant value (IC 50 = 66.852 ppm).
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