Uji Fitokimia dan Antioksidan Ekstrak Etanol Buah Terung Asam (Solanum Ferox L)

Penelitian ini bertujuan untuk mengetahui kandungan senyawa kimia dan aktivitas antioksidan ekstrak etanol buah terung asam (Solanum ferox L). Untuk mencapai tujuan tersebut digunakan beberapa cara yaitu dengan melakukan uji fitokimia alkaloid, terpenoid, steroid, saponin, fenolat secara umum, dan flavonoid. Hasil dari uji fitokimia menunjukkan reaksi positif terhadap beberapa pereaksi yaitu uji alkaloid, uji terpenoid, uji fenolat dan uji flavonoid. Sedangkan uji steroid dan saponin tidak memberikan hasil yang positif terhadap pereaksi. Selanjutnya dilakukan uji antioksidan dan diperoleh nilai  IC50 sebesar 177,16 ppm. Sehingga dapat disimpulkan ekstrak etanol buah terung asam memiliki aktivitas antioksidan sedang

Analysis of Atomic Structure Material in Class X High School Chemistry Textbooks

This research is a qualitative research. This research method is a descriptive research method. The research instrument used was the concept label identification table and the type of representation, the concept label conformity identification table with the syllabus, the discourse macro structure model, and the chemical representation criteria table. The results showed that the concept labels contained in book A were 27 concept labels and had 50 types of representations divided into macroscopic, submicroscopic, symbolic typologies. The concept labels contained in book B are 32 concept labels with 68 types of representations divided into macroscopic, submicroscopic, and symbolic typologies. The suitability of the concept textbook labels A and text book B to the 2013 curriculum curriculum chemistry there are 31 concept labels that correspond to the K-13 chemical syllabus. Book A's macro structure reaches level 7 of the elaboration dimension, and book B reaches level 7 of the elaboration dimension. The chemical representation criteria for the concept of atomic structure in book A have 21 representations, and in book B there are 26 representations

Development of Multimedia Learning of Electrolyte and Non Electrolyte Solutions Based on Multiple Representations Using Lectora Inspire

This study aims to determine the content and feasibility of Lectora Inspire learning multimedia based on multiple representations of electrolyte and non-electrolyte solutions. This multimedia learning is a combination of text, images, animation, and video. This multimedia development learning based on multiple representations uses the Four-D (4D) model adapted from Thiagarajan. This development research only reaches three stages, namely define, design and develop. The data needed in this study is the suitability of concept label data with the 2013 curriculum syllabus, the suitability of learning multimedia content using the concept label checklist, narrative and typology as well as product test result data using student response questionnaires. The instruments used to obtain the data are the concept label identification table with the 2013 curriculum syllabus, the concept label identification table, narration and typology, the concept label conformity checklist, narrative and typology, and the response questionnaire. Product trials were conducted on the 2018 chemistry students to determine the feasibility of students for multimedia that had been developed. Multimedia learning based on multiple representations using lectora inspire consists of home pages, instructions for using multimedia, how to read navigation content and materials for electrolyte and non-electrolyte solutions. The contents of multimedia content on electrolyte and non-electrolyte solution material consist of seven concept labels. The average individual product trial results are 93.2%. While the average product trial results in groups of 93.6%

Development of Multimedia Learning Using Multiple-Based Lectora Inspire on Chemical Equilibrium Materials

This study aims to describe the content and quality of multimedia learning Lectora Inspire based on multiple representations of Chemical Equilibrium material. This multimedia development learning based on multiple representations uses the Four-D (4D) model adapted from Thiagarajan. This study is limited to the stages define (defining), design (design) and develop (development). The data needed is the suitability of the concept label with the 2013 curriculum syllabus, the suitability of learning multimedia content with the concept label, narrative and typology as well as the results of the trial. The instruments used to obtain the data are the concept label identification table with the 2013 curriculum syllabus, the concept label identification table, narrative and typology, the concept label conformity checklist, narrative and typology, and the response questionnaire. Product trials were conducted on the 2018 chemistry students to determine the feasibility of students for multimedia that had been developed. Multimedia learning based on multiple representations using lectora inspire consists of home pages, instructions for using multimedia, how to read navigation content and chemical equilibrium materials. The chemical equilibrium material content consists of fourteen concept labels. Multimedia learning based on multiple representations using Lectora Inspire on chemical equilibrium material is dominated by concept labels that include submicroscopic typology and symbolic chemical equilibrium about reaction processes microscopically. The average individual trial results are 87.2% and the average group trial results are 88.5%

The Development of Android-based Learning Media on the Organic Compounds

General Chemistry is one of the compulsory subjects offered in the first year joint lectures at the Mathematics and Natural Sciences Education Department, FKIP Universitas Palangka Raya. The Covid-19 pandemic that has hit countries globally has had its own impacts and challenges for educational institutions, especially universities. Basic chemistry online lectures have combined various platforms such as google classroom, Edmodo, whatsapp groups, and online meetings such as google meet and zoom. However, this platform has some constraints, especially signal constraints, data packets, and management of shared data. Therefore, interactive learning media was developed, which can integrate text, images, audio, video and graphics, namely Android. This study aims to develop android-based general chemistry learning media on organic compound material and describe the feasibility of basic chemistry learning media. The development model used is the DDD-E model. The results of the development showed that the product resulting from the development process is an android-based learning media application in the form of an interactive e-book consisting of lesson plans, concept maps, instructions, materials, laboratory experiments, evaluation and team. Android-based learning media in the form of e-modules is suitable for use in learning Basic Chemistry. The results of the material expert's assessment obtained an average value of 82.14% (Good). The results of the media expert's assessment obtained an average value of 87.5% (Good)