Ria Rahayu, Retno Aliyatul Fikroh, D. R. Sari, Pandu Ridzaniyanto
{"title":"PENGEMBANGAN MEDIA PEMBELAJARAN BERBASIS GOOGLE SITES BERMUATAN CHEMO-ENTREPRENEURSHIP PADA MATERI GUGUS FUNGSI SENYAWA KARBON","authors":"Ria Rahayu, Retno Aliyatul Fikroh, D. R. Sari, Pandu Ridzaniyanto","doi":"10.22373/lj.v10i2.14496","DOIUrl":"https://doi.org/10.22373/lj.v10i2.14496","url":null,"abstract":"","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48956839","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}
Qur’an surah An-Nahl verses 68 and 69 provide information about the nature of bees and their benefits for human life. Allah inspires bees to build nests and find food in trees, mountains, and places made by humans. This study aims to examine scientific information on bees in Surah An-Nahl verses 68 and 69. The research method is library research. The results showed that bees in Surah An-Nahl verses 68 and 69 produce honey, have a good life, have great teamwork, and give benefits to human life. Bee gives people good role models for human society, teamwork, and lifestyle. In science, bees produce pheromone chemical compounds that play a role in communication between bees in the colony. The pheromones produced by the queen bee can regulate the male bees and worker bees to be loyal to the queen bee and carry out their duties well. Qur’an Surah An-Nahl verses 68 and 69 give us information about the bee and honey. Allah gives a message to people to live like a bee to have a good social, good lifestyle, don’t destroy the environment, and give benefits to people like honey. Rasullullah advised us to consume honey for treatment. Honey functions as an antioxidant, anticancer, and energy source, healthy heart, control sugar level, and maintain a healthy body. Bee food is nectar, good nectar will produce high-quality honey. Chemical compounds that are often found in honey like glucose, flavonoid, alkaloid, saponin, and glycoside.
{"title":"CHEMICAL COMPOUNDS OF BEES IN QUR’AN","authors":"Z. Zulkarnain, S. Suprapto","doi":"10.22373/lj.v10i2.14900","DOIUrl":"https://doi.org/10.22373/lj.v10i2.14900","url":null,"abstract":"Qur’an surah An-Nahl verses 68 and 69 provide information about the nature of bees and their benefits for human life. Allah inspires bees to build nests and find food in trees, mountains, and places made by humans. This study aims to examine scientific information on bees in Surah An-Nahl verses 68 and 69. The research method is library research. The results showed that bees in Surah An-Nahl verses 68 and 69 produce honey, have a good life, have great teamwork, and give benefits to human life. Bee gives people good role models for human society, teamwork, and lifestyle. In science, bees produce pheromone chemical compounds that play a role in communication between bees in the colony. The pheromones produced by the queen bee can regulate the male bees and worker bees to be loyal to the queen bee and carry out their duties well. Qur’an Surah An-Nahl verses 68 and 69 give us information about the bee and honey. Allah gives a message to people to live like a bee to have a good social, good lifestyle, don’t destroy the environment, and give benefits to people like honey. Rasullullah advised us to consume honey for treatment. Honey functions as an antioxidant, anticancer, and energy source, healthy heart, control sugar level, and maintain a healthy body. Bee food is nectar, good nectar will produce high-quality honey. Chemical compounds that are often found in honey like glucose, flavonoid, alkaloid, saponin, and glycoside.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68316686","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}
This objective of this study for investigate mental models of SMA Negeri 1 Telaga students about electrolyte and non-electrolyte solutions. Data was collected by giving a mental model test in the form of two-level multiple choice in class X involving 196 students. The results showed that the analysis of the mental model of students of class X science about electrolyte and non-electrolyte solutions was 38% classified as scientific mental models and 62% alternative mental models, which consisted of 30% partially correct mental models, 32% misconceptions (Specific Misconception) and 0% no response (No Responds). Thus, most students do not yet have a complete mental model in understanding the material of electrolyte and non-electrolyte solutions.
本研究的目的是探讨SMA Negeri 1 Telaga学生关于电解质和非电解质溶液的心理模型。数据是通过对X班196名学生进行两级选择题形式的心理模型测试来收集的。结果表明:科学X班学生对电解质和非电解质溶液的心理模型分析中，科学心理模型占38%，另类心理模型占62%，其中部分正确的心理模型占30%，误解(Specific误区)占32%，无反应(no responses)占0%。因此，大多数学生在理解电解质和非电解质溶液的材料方面还没有一个完整的心智模型。
{"title":"MODEL MENTAL SISWA SMA DALAM MEMAHAMI KONSEP LARUTAN ELEKTROLIT DAN NON-ELEKTROLIT","authors":"Suliyana Ibrahim, Mangara Sihaloho, Masrid Pikoli","doi":"10.22373/lj.v10i2.14533","DOIUrl":"https://doi.org/10.22373/lj.v10i2.14533","url":null,"abstract":"This objective of this study for investigate mental models of SMA Negeri 1 Telaga students about electrolyte and non-electrolyte solutions. Data was collected by giving a mental model test in the form of two-level multiple choice in class X involving 196 students. The results showed that the analysis of the mental model of students of class X science about electrolyte and non-electrolyte solutions was 38% classified as scientific mental models and 62% alternative mental models, which consisted of 30% partially correct mental models, 32% misconceptions (Specific Misconception) and 0% no response (No Responds). Thus, most students do not yet have a complete mental model in understanding the material of electrolyte and non-electrolyte solutions.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45417626","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}
The material of electron configuration is the basis for understanding an atom. Many students have misconceptions about learning this material. The purpose of this research is to develop a traditional game of congklak that can increase students' motivation to learn electron configuration material. The method used in this study uses a 4-D model consisting of four stages, namely: definition, design, development, and dissemination. However, the dissemination stage is not carried out. The assessment of the traditional game of Congklak is carried out by material experts, media experts, reviewers, reviewers, and high school or MA MIPA students. The instruments used to assess quality were a Likert scale questionnaire and a Guttman scale questionnaire. The assessment of media development shows good and ideal results with the following scores: material expert lecturers are 94.00% in the Very Good category, media expert lecturers are 95.50% in the Very Good category, and reviewers (chemistry teachers) get an average score with a percentage of 94.82% in the Very Good category, and the results of student responses to the media showed a percentage of 96.36%. The traditional game of congklak can be used as an alternative to increase students' motivation and enthusiasm for learning electron configuration material in SMA/MA.
{"title":"PENGEMBANGAN PERMAINAN TRADISIONAL CONGKLAK PADA MATERI KONFIGURASI ELEKTRON UNTUK PESERTA DI SMA/MA","authors":"Noviyanti Dwi Astuti, L. Muna","doi":"10.22373/lj.v10i2.14679","DOIUrl":"https://doi.org/10.22373/lj.v10i2.14679","url":null,"abstract":"The material of electron configuration is the basis for understanding an atom. Many students have misconceptions about learning this material. The purpose of this research is to develop a traditional game of congklak that can increase students' motivation to learn electron configuration material. The method used in this study uses a 4-D model consisting of four stages, namely: definition, design, development, and dissemination. However, the dissemination stage is not carried out. The assessment of the traditional game of Congklak is carried out by material experts, media experts, reviewers, reviewers, and high school or MA MIPA students. The instruments used to assess quality were a Likert scale questionnaire and a Guttman scale questionnaire. The assessment of media development shows good and ideal results with the following scores: material expert lecturers are 94.00% in the Very Good category, media expert lecturers are 95.50% in the Very Good category, and reviewers (chemistry teachers) get an average score with a percentage of 94.82% in the Very Good category, and the results of student responses to the media showed a percentage of 96.36%. The traditional game of congklak can be used as an alternative to increase students' motivation and enthusiasm for learning electron configuration material in SMA/MA.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44029721","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}
Rahmad Rizki Fazli, Latifah Hanum, Mieke Alvionita, Said Ali Akbar
This research has isolated one type of halophilic bacterial strain from the salt pond of Kajhu Village with the code KJ-AB2. This bacterium grew optimally at 10% (w/v) NaCl so it was classified as moderate halophilic bacteria. Several types of halophilic bacteria are known to produce biosurfactants. Biosurfactants are surface active agents that are widely used in several pharmaceutical, food dan petroleum industries. The production of biosurfactants is strongly influenced by the type of carbon source used for bacterial growth. Olive oil, palm oil, sunflower oil, glucose dan glycerol are types of carbon sources used to see their effect in producing biosurfactants. This isolate growed well on the five carbon sources with an average OD600 2.001±0.293 at 72 hours of fermentation. Biosurfactant production was measured by oil spreading test (OST) every 24 hours until 120 hours of fermentation. The highest OST value was obtained when KJ-AB2 isolate was grown on biosurfactant production media using olive oil, sunflower oil dan palm oil with an average OST value of 5.6±0.6 cm, 4.7±0.6 cm, dan 4.6±0.7 cm, respectively.
{"title":"VARIASI SUMBER KARBON TERHADAP PRODUKSI BIOSURFAKTAN OLEH BAKTERI HALOFILIK ISOLAT TAMBAK GARAM KAJHU ACEH BESAR","authors":"Rahmad Rizki Fazli, Latifah Hanum, Mieke Alvionita, Said Ali Akbar","doi":"10.22373/lj.v10i1.14108","DOIUrl":"https://doi.org/10.22373/lj.v10i1.14108","url":null,"abstract":"This research has isolated one type of halophilic bacterial strain from the salt pond of Kajhu Village with the code KJ-AB2. This bacterium grew optimally at 10% (w/v) NaCl so it was classified as moderate halophilic bacteria. Several types of halophilic bacteria are known to produce biosurfactants. Biosurfactants are surface active agents that are widely used in several pharmaceutical, food dan petroleum industries. The production of biosurfactants is strongly influenced by the type of carbon source used for bacterial growth. Olive oil, palm oil, sunflower oil, glucose dan glycerol are types of carbon sources used to see their effect in producing biosurfactants. This isolate growed well on the five carbon sources with an average OD600 2.001±0.293 at 72 hours of fermentation. Biosurfactant production was measured by oil spreading test (OST) every 24 hours until 120 hours of fermentation. The highest OST value was obtained when KJ-AB2 isolate was grown on biosurfactant production media using olive oil, sunflower oil dan palm oil with an average OST value of 5.6±0.6 cm, 4.7±0.6 cm, dan 4.6±0.7 cm, respectively.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49066511","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}
Chusnur Rahmi, Ana Fitria, Vivit Santika, Srilidiya Rahmawati
Media plays an important role in the chemistry learning process. The development of media in chemistry learning can help teachers increase students' knowledge and interest in learning. This study aims to determine the development of media in chemistry learning in terms of the types of media, development methods, and chemical materials. This research uses literature study method. The data analyzed in this study are the results of research from 26 articles on media development in chemistry learning that have been published in national journals. The results showed that in chemistry learning, visual-based media, inquiry-based media, video-based media, application-based media, and interactive media have been developed. Learning media was developed using the Research and Development (R&D) method with Borg and Gall, 3D, 4D, and ADDIE development models. Android-based media is the most popular as a medium for chemistry learning. The ADDIE development model is the most widely used in developing chemistry learning media. The development of learning media accommodates 30.8% of class X chemistry, 46.2% of class XI chemistry, and 23.1% of class XI chemistry.
{"title":"ANALISIS PENGEMBANGAN MEDIA DALAM PEMBELAJARAN KIMIA","authors":"Chusnur Rahmi, Ana Fitria, Vivit Santika, Srilidiya Rahmawati","doi":"10.22373/lj.v10i1.13355","DOIUrl":"https://doi.org/10.22373/lj.v10i1.13355","url":null,"abstract":"Media plays an important role in the chemistry learning process. The development of media in chemistry learning can help teachers increase students' knowledge and interest in learning. This study aims to determine the development of media in chemistry learning in terms of the types of media, development methods, and chemical materials. This research uses literature study method. The data analyzed in this study are the results of research from 26 articles on media development in chemistry learning that have been published in national journals. The results showed that in chemistry learning, visual-based media, inquiry-based media, video-based media, application-based media, and interactive media have been developed. Learning media was developed using the Research and Development (R&D) method with Borg and Gall, 3D, 4D, and ADDIE development models. Android-based media is the most popular as a medium for chemistry learning. The ADDIE development model is the most widely used in developing chemistry learning media. The development of learning media accommodates 30.8% of class X chemistry, 46.2% of class XI chemistry, and 23.1% of class XI chemistry. ","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46741590","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}
N. Saraswati, I. M. O. Riawan, Astrid Alvania Rihi
Remazol is a reactive dye that is widely used in the textile industry with functional groups that can be well covalently bonded to textile fibres, but difficult to decompose, carcinogenic, and harmful to the health and ecosystems. This study specifically aims to analyse the adsorption power of activated carbon on three types of Remazol dyes using batch experiment method as an effective way to reduce the concentration of these dyes in textile industry wastewater. Using activated carbon with the same treatment, Remazol Red dye had the best interaction and was adsorbed in the highest amount on the activated carbon surface (125.16 mg/g), followed by Remazol Blue (16.23 mg/g) and finally Remazol Black dye (11.07 mg/g). The three adsorption processes that occur are in accordance with the Langmuir adsorption isotherm model, with color removal percentage of 74.4 % (Remazol Red), 49.5 % (Remazol Blue), and 48.1 % (Remazol Black). These results are in accordance with the structural studies conducted on the three types of Remazol synthetic dyes, in which Remazol Black with the bulkiest structure has the weakest physical interaction with carbon atoms on the activated carbon surface thus absorbed in the least amount on the adsorbent surface.
{"title":"STUDI KOMPARASI ADSORPSI TIGA JENIS ZAT WARNA REMAZOL PADA PERMUKAAN KARBON AKTIF","authors":"N. Saraswati, I. M. O. Riawan, Astrid Alvania Rihi","doi":"10.22373/lj.v10i1.13878","DOIUrl":"https://doi.org/10.22373/lj.v10i1.13878","url":null,"abstract":"Remazol is a reactive dye that is widely used in the textile industry with functional groups that can be well covalently bonded to textile fibres, but difficult to decompose, carcinogenic, and harmful to the health and ecosystems. This study specifically aims to analyse the adsorption power of activated carbon on three types of Remazol dyes using batch experiment method as an effective way to reduce the concentration of these dyes in textile industry wastewater. Using activated carbon with the same treatment, Remazol Red dye had the best interaction and was adsorbed in the highest amount on the activated carbon surface (125.16 mg/g), followed by Remazol Blue (16.23 mg/g) and finally Remazol Black dye (11.07 mg/g). The three adsorption processes that occur are in accordance with the Langmuir adsorption isotherm model, with color removal percentage of 74.4 % (Remazol Red), 49.5 % (Remazol Blue), and 48.1 % (Remazol Black). These results are in accordance with the structural studies conducted on the three types of Remazol synthetic dyes, in which Remazol Black with the bulkiest structure has the weakest physical interaction with carbon atoms on the activated carbon surface thus absorbed in the least amount on the adsorbent surface.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48937524","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}
Good facilities, effective and efficient chemical laboratory management must be applied so that chemistry practicum activities can be carried out properly. Previous research has shown that the management of chemical laboratories in several high schools has not been carried out properly, so it is necessary to conduct this study at SMA Negeri 1 Tapaktuan, South Aceh. The purpose of this study was to determine the effectiveness of chemical laboratory management at SMA Negeri 1 Tapaktuan, South Aceh. This research was conducted qualitatively accompanied by descriptive analysis. Subjects in this study; principal, person in charge/head of chemical laboratory, laboratory staff and chemistry teacher. Collecting data by observation, interviews and documentation. Next, the research results are classified into 4 aspects of laboratory management which consist of planning, organizing, implementing and monitoring which are divided into 28 criteria. The results obtained are the management of the chemistry laboratory which is well implemented 75%, less good 10.72% and not good 14.28%. The conclusion of this study is that the chemical laboratory management at SMA Negeri 1 Tapaktuan South Aceh has not been effective because it has not reached 80% of all aspects of chemical laboratory management.
要使化学实习活动顺利进行，必须具备良好的化学实验室设施和高效有效的化学实验室管理。以前的研究表明，几所高中的化学实验室没有得到适当的管理，因此有必要在南亚齐的SMA Negeri 1 Tapaktuan进行这项研究。本研究的目的是确定南亚齐省SMA Negeri 1 Tapaktuan化学实验室管理的有效性。本研究采用定性分析和描述性分析相结合的方法。本研究对象;校长、化验室负责人、化验室工作人员、化学老师。通过观察、访谈和文件收集数据。其次，将研究成果划分为实验室管理的规划、组织、实施和监控4个方面，分为28个标准。结果表明:化学实验室管理执行良好的占75%，较差的占10.72%，较差的占14.28%。本研究的结论是，南亚齐省SMA Negeri 1 Tapaktuan的化学实验室管理没有有效，因为它没有达到化学实验室管理的所有方面的80%。
{"title":"KEEFEKTIFAN MANAJEMEN LABORATORIUM KIMIA DI SMA NEGERI 1 TAPAKTUAN ACEH SELATAN","authors":"Noviza Rizkia, Taslima Taslima","doi":"10.22373/lj.v10i1.13374","DOIUrl":"https://doi.org/10.22373/lj.v10i1.13374","url":null,"abstract":"Good facilities, effective and efficient chemical laboratory management must be applied so that chemistry practicum activities can be carried out properly. Previous research has shown that the management of chemical laboratories in several high schools has not been carried out properly, so it is necessary to conduct this study at SMA Negeri 1 Tapaktuan, South Aceh. The purpose of this study was to determine the effectiveness of chemical laboratory management at SMA Negeri 1 Tapaktuan, South Aceh. This research was conducted qualitatively accompanied by descriptive analysis. Subjects in this study; principal, person in charge/head of chemical laboratory, laboratory staff and chemistry teacher. Collecting data by observation, interviews and documentation. Next, the research results are classified into 4 aspects of laboratory management which consist of planning, organizing, implementing and monitoring which are divided into 28 criteria. The results obtained are the management of the chemistry laboratory which is well implemented 75%, less good 10.72% and not good 14.28%. The conclusion of this study is that the chemical laboratory management at SMA Negeri 1 Tapaktuan South Aceh has not been effective because it has not reached 80% of all aspects of chemical laboratory management.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48104676","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}
The leather tanning industry of Sukanggang Garut is an industry that has the potential to produce wastewater that contains a lot of organic substances. Therefore, it is necessary to conduct an effective test to determine the parameters of wastewater pollution in the leather tanning industry. The purpose of this study was to test the value of water pH, Chemical Oxygen Demand (COD), Biochemical oxygen Demand (BOD), Total Suspended Solid (TSS), and the amount of chromium concentration in the sample taken. The BOD test will be carried out using the Winkler method, the COD test will be carried out using the reflux method and the TSS test will be carried out using the gravimetric method, while the chromium concentration test will use an AAS spectrophotometer and the pH test will be carried out using a pH meter. The test results show that the liquid waste from the tanning industry activity in Sukaregang Garut exceeds the liquid waste threshold for the leather tanning industry.
{"title":"ANALISIS PARAMETER AIR LIMBAH INDUSTRI PENYAMAKAN KULIT SUKAREGANG GARUT","authors":"Astri Senania, N. Yanti","doi":"10.22373/lj.v10i1.11088","DOIUrl":"https://doi.org/10.22373/lj.v10i1.11088","url":null,"abstract":"The leather tanning industry of Sukanggang Garut is an industry that has the potential to produce wastewater that contains a lot of organic substances. Therefore, it is necessary to conduct an effective test to determine the parameters of wastewater pollution in the leather tanning industry. The purpose of this study was to test the value of water pH, Chemical Oxygen Demand (COD), Biochemical oxygen Demand (BOD), Total Suspended Solid (TSS), and the amount of chromium concentration in the sample taken. The BOD test will be carried out using the Winkler method, the COD test will be carried out using the reflux method and the TSS test will be carried out using the gravimetric method, while the chromium concentration test will use an AAS spectrophotometer and the pH test will be carried out using a pH meter. The test results show that the liquid waste from the tanning industry activity in Sukaregang Garut exceeds the liquid waste threshold for the leather tanning industry.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44983527","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}
Nurmalahayati Nurdin, Haris Munandar, Hanifatussyifa Hanifatussyifa, Ulfa Yusriani
This study aims to describe the effectiveness of the chemistry learning process by using online methods, the challenges and the advantages of using media in learning chemistry. This research was conducted at several high schools in Aceh with a sample of 70 people, of which consist 60 students and 10 teachers. Based on the results of the data analysis, it can be concluded that in the time of the pandemic, the use of media online has signigficanntly increased, but about 35.3% of the respondents mentioned that the use of media online for teaching chemistry is not very effective. However, the advantages of using media online in teaching chemistry during the pandemic Covid-19 are to help avoid the spreading of the virus Covid-19.
{"title":"EFEKTIFITAS PENGGUNAAN MEDIA PEMBELAJARAN DARING DALAM PEMBELAJARAN KIMIA PADA MASA PANDEMI","authors":"Nurmalahayati Nurdin, Haris Munandar, Hanifatussyifa Hanifatussyifa, Ulfa Yusriani","doi":"10.22373/lj.v10i1.13416","DOIUrl":"https://doi.org/10.22373/lj.v10i1.13416","url":null,"abstract":"This study aims to describe the effectiveness of the chemistry learning process by using online methods, the challenges and the advantages of using media in learning chemistry. This research was conducted at several high schools in Aceh with a sample of 70 people, of which consist 60 students and 10 teachers. Based on the results of the data analysis, it can be concluded that in the time of the pandemic, the use of media online has signigficanntly increased, but about 35.3% of the respondents mentioned that the use of media online for teaching chemistry is not very effective. However, the advantages of using media online in teaching chemistry during the pandemic Covid-19 are to help avoid the spreading of the virus Covid-19.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42566022","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：