Manganese oxides have been applied for the wide range of applications such as catalyst, sensor, adsorben, battery materials and super capacitor. This research focuses on the synthesis of layer and tunnel structures of manganese oxides. The two phases of manganese oxides, birnessite (layered material) and cryptomelane (tunnel material) were successfully synthesized by reflux method and then dop…
The utilized of oil palm plantation waste in the form of fronds, Oil Palm Fronds (OPF) needs to be increased in economic value so that it will reduce OPF waste in Riau Province, by converted it to Activated Charcoal of Oil Palm Fronds (ACOPF). OPF has the potential as a basic material in the manufacture of ACOPF because it contains high levels of cellulose and hemicellulose. This study aims to …
Oil palm fronds are oil palm plantation’s solid waste that is produced before and after harvest. The carbon compounds in palm fronds have potential as adsorbent-base activated carbon. Activated carbon synthesis needs a carbonization method and chemical activation using KOH. The first step, oil palm fronds are carbonized at various temperatures ( 400, 500 and 600 oC) for 60 minutes, producing …
Pyrazole is five ring heterocyclic compounds with two adjacent nitrogen atoms and it has two endocyclic double bonds which are known to have diverse biological activities such as anti-inflammatory, analgesic, antibacterial, antimalarial, antioxidant, and anticancer. Pyrazole analogue 5-(4-fluorophenyl)- 3-(naphthalene-2-yl)-1-phenyl-1H-pyrazole (PZL-4F-AN2) was successfully synthesized through …
This research aims to develop E-LKPD on scientific approach using adobe acrobat 11 pro extended on acids and bases for grade XI SMA/MA. E-LKPD on scientific approach to the stage of the scientific approach. The type of this research is research and development (R and D) with reference to the development process of Plomp, but only up to the limited trial stage. The object of this research is E-L…
The global Covid-19 pandemic cause many changes, including teaching and learning activities in the school, where the face to face learning had to be replaced by online learning. So, this research aimed to find the relationship between the visual and auditory learning style with students’ learning outcomes on the subject of ionic equilibrium and pH of buffer in the pandemic of Covid-19. This r…
Critical thinking is a high-level thinking ability (High Order Thinking Skills), including the ability to analyze and evaluate what learners need as life skills that are in accordance with the demands of 21st century learning. New challenges for educators arise in line with the enactment of Distance Learning during the pandemic so that interactive teaching materials are needed to improve the HO…
This Research aims to develop Student Worksheets Oriented Literated Science on the subject Chemical Bond valid based on the feasibility aspect of content, characteristics of Literated Science, language, serve and graphic. The type of this research is research and development (R and D) with reference to the development process of Plomp. The subject of this research is student worksheets oriented…
This research aims to develop an ICARE-based Student Activity Worksheet (LKPD) on ionic equilibrium and pH of buffer solutions. This development research uses a 4-D model (Define, Design, Develop, Disseminate). This research was only reaches the Development stage. The data instrument used a sheet validation and user response questionnaires. Validation was carried out by 3 validators with result…
This Research aims to Student Activity Worksheet (LKPD) based on ICARE of determination of the enthalpy changes subject for class XI SMA/MA valid based on content feasibilities, characteristics ICARE, linguistic, presentation, and graphics. The type of this research is development research (Research and Development) with the process referring to the plomp development model. The object of this r…
Development of LKPD based on Multiple Representations on the subject of acids and bases aims to develop teaching materials that are valid and suitable for use in the learning process. The research used the research method Research and Development (R&D) with a 4-D model consisting of 4 stages, namely, Define, Design, Develop, and Disseminate, but in the Multiple Representation-based LKPD develop…
Development of student activity sheets with the PISI learning model is the development of discovery-based student sheets, where students play an active role while the teacher acts as a facilitator. The purpose of this study is to develop PISI-based student activity sheets as valid teaching materials based on 5 aspects of feasibility, namely the feasibility of content, PISI context, language, pr…
This research aimed to develop Student Activities Worksheet based on EKPA based on EKPA of electrolyte solutions and nonelectrolyte solutions subject which are valid according to the validators assessment and determine the response from the user side namely teaches and students. There are 5 aspects of feasibility that are assassed, namely the feasibility of content, language, presentation, grap…
This research aims to develop an ICARE-based module on acid and base. This development research uses the ADDIE model which has 5 stages, namely, A (Analysis), D (Design), D (Development), I (Implementation), E (Evaluation), but this research only reaches the Development stage. The data instrument used is a sheet validation and user response questionnaires. Validation was carried out by 3 valida…
This study aims to develop student worksheets based on the ARCS model on ionic equilibrium and pH of the buffer solution subject, determining the validity of student worksheets of the aspects of content, ARCS characteristics, language, presentation, graphics and find out user responses through student worksheets based on ARCS models on ionic equilibrium and pH buffer solution subject. This rese…
This study aims to produce an e-Module reaction rate based on multiple representations using sigil valid according to the validator. This type of research is research and development with referemce to thedevelopment process of ADDIE. The object of this research is a teaching material in the form of e-Module reaction rate based on multiple representations using sea digital learning (Sigil) for c…
The development of this LKPD aims to develop a valid Think-Pair-Share (TPS) type cooperative learning model based on validator and practical assessment based on user response tests, namely teachers and learners. Valid assessment is based on 5 aspects of feasibility, namely content feasibility, feasibility characteristics of TPS learning model, language feasibility, feasibility of presentation a…
This development research aims to develop LKPD based on the ARCS model which is considered valid according to the validator's assessment as well as practical based on user response tests (teachers and students). Validity is assessed based on 6 aspects of feasibility, namely the feasibility of content, the feasibility of the ARCS model characteristics, linguistic feasibility, presentation feasib…
This research aims to develop Student Activities Worksheet Based on CUPs on the Stoikiometri material for grade X SMA/MA. Student Worksheet Based are designed according to the CUPs model contens. The type of this research is research and development (R and D) with reference to the development process of 4-D. The subject pf this research is student activities worksheets based on CUPs. Instrument…
Pyrazole is a five rings of heterocyclic compounds with three carbon atoms and two nitrogen atoms in a position that adjacent each other and it has two endocyclic double bonds. Pyrazole has a pharmacological effect on humans and this compound as an important compound in the development of new drugs, one of which is an anticancer drug. Hence, in this study, the synthesis of pyrazole 5-(…