https://jurnalfkipuntad.com/index.php/jak/issue/feed 2025-02-28T00:00:00+00:00 Prof. Daud K. Walanda, PhD. jak.untad@gmail.com Open Journal Systems <p><img style="float: left; padding-right: 30px;" src="http://jurnal.untad.ac.id/jurnal/public/site/images/kwalanda/Cover_JAK-Nov2015-small1.jpg" alt="" width="112" height="112" align="left" /></p> <ul> <li><strong>ISSN <a href="http://u.lipi.go.id/1415349265">2477-5185</a> (<em>Electronic</em>), ISSN <a href="http://u.lipi.go.id/1348308719">2302-6030</a> (<em>Printed</em>)</strong></li> <li><strong>CODEN (Chemical Abstract Services): JAKUA7</strong></li> <li><strong>The Jurnal is published quarterly (February, May, August, and November)<br /></strong></li> <li><strong>Publisher: Universitas Tadulako</strong></li> <li><strong>Accreditation: <a href="https://drive.google.com/file/d/1lXjl6NnSq237Oid2bJwLMyYb3b8T3CjO/view?usp=share_link">SINTA 3</a> (Decree No. <a href="https://drive.google.com/file/d/1OvG2kQPJCuIbY7DdNgYnrW8rdvSRke5w/view?usp=share_link">204/E/KPT/2022</a>) </strong></li> <li><strong>Editor in Chief: Prof. Daud K. Walanda, PhD.</strong></li> </ul> <p style="color: #083a6f;" align="justify"><strong>Jurnal Akademika Kimia</strong> is an electronic open-access journal that aims to publish the latest research results in the area of chemistry education and pure chemistry from academicians, professionals, and other practitioners at all levels of chemistry education. The journal coverage includes the following: current trends of professional chemistry education, educational technology, teacher education, educational science, learning assessment, learning models and development of learning materials, as well as pure chemistry including organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, biochemistry and other chemistry fields such as environmental chemistry, that emphasis on a broad description of the general methods and processes for the synthesis, modification, and characterization of chemical materials.</p> https://jurnalfkipuntad.com/index.php/jak/article/view/3697 2024-11-21T06:15:36+00:00 Natasya S. Safitri liasisil683@gmail.com Yenni Kurniawati yenni.kurniawati@uin-suska.ac.id

<p class="Abstract" style="margin-right: -5.65pt;"><a name="_Hlk182828911"></a><span style="font-size: 10.5pt;">The cognitive ability of each student is different. To improve it, it needs to be trained and optimized. The purpose of cognitive skills is the implementation of differentiated learning using a 3D Chemistry Periodic Table Application to improve the students’ cognitive ability. This research was implemented in the even semester academic year 2023 / 2024 at State Senior High School 1 Tambang. The method used in this research was mixed-method research with a research design Sequential Explanatory model, with research samples consisting of three classes of Grade X at State Senior High School 1 Tambang, namely two (2) experimental classes and one (1) control class. The post-test research result showed a significance of 0.000 &lt; 0.05 until indicating a significant difference between the experimental and control classes. Besides, the average N-Gain of the experimental class namely 0.77, and the second experimental class was 0.71, with high category, and the control class was 0.60, with medium category. In other words, it is proven that differentiated learning with a 3D application increases cognitive ability. The students’ response after gaining the learning by using 3D was excellent, with a percentage of 81.41 %. The results of this research are expected to help teachers improve the students’ cognitive abilities</span><span style="font-size: 10.5pt;">.</span></p>

2025-05-19T00:00:00+00:00 Copyright (c) 2025 Yenni Kurniawati, Natasya Sisilia Safitri https://jurnalfkipuntad.com/index.php/jak/article/view/3763 2024-12-17T04:24:49+00:00 Tri Santoso trisantoso@untad.ac.id Hasrudin Hasrudin hasrunhfd@gmail.com Sitti Aminah Aminah.chem@yahoo.com Sri H. V. Pulukadang srihastutibulo@yahoo.com

<p>The phenomenon of environmental damage due to unlicensed gold mining activities harms aquatic ecosystems. Mercury (Hg) waste from the mining process has the potential to cause bioaccumulation in aquatic biota such as fish and crabs, which can lead to mercury contamination in the human body through the food chain. The bioaccumulation process can also produce toxic organic compounds that harm human health. Therefore, this research aims to determine whether mercury bioaccumulation occurs in yuyu crabs in the Janja River, Malomba Village, Dondo District, Tolitoli Regency, due to gold mining activities. The method used in the research is the calibration curve method with Cold Vapor Atomic Absorption Spectrophotometry (CV-AAS) analysis at a wavelength of 253.7 nm. The results obtained from this research indicate that bioaccumulation has occurred in yuyu crabs that live in the Janja River. The highest accumulated mercury metal levels were obtained at upstream locations with an average of 5.24 ppb; the lowest was in the midstream, which is 1.53 ppb. At the downstream location, it has a mercury concentration of 4.53 ppb. So it shows that the mercury contamination in the yuyu crab samples is below the quality standard threshold, Indonesian National Standard No. 7387 of 2009, for the heavy metal mercury in other types of crabs and crustaceans is 1.0 ppm or 1000 ppb.</p>

2025-02-28T00:00:00+00:00 Copyright (c) 2025 Tri Santoso, Hasrudin Hasrudin, Sitti Aminah , Sri H. V. Pulukadang