ABSTRACT Instant yeast is a leavening agent in making bread containing microorganisms of the Saccharomyces cerevisiae type. However, sourdough is now starting to be considered as an alternative because it has several advantages, including being able to enrich the taste, extend the shelf life of the product, and being easier to digest. This study aims to produce natural yeast through fermentati…
ABSTRACT The increase in the number of laundry services will be directly proportional to the amount of liquid waste generated at the end of the activity. Therefore, it is necessary to develop effective and environmentally friendly waste treatment methods. The adsorption process is still the best choice for liquid waste treatment, especially if it uses environmentally friendly adsorbents, for e…
ABSTRACT Silica gel is a material widely used in the industrial sector as an adsorbent, filler, and catalyst support. It can be synthesized from various natural sources containing silica (SiO₂), one of which is laboratory glass waste. In this study, silica gel was synthesized from laboratory glass waste through the production of sodium silicate, followed by precipitation using HCl solution. …
ABSTRACT Silica gel is a material widely used in the industrial sector as an adsorbent, filler, and catalyst support. It can be synthesized from various natural sources containing silica (SiO₂), one of which is laboratory glass waste. In this study, silica gel was synthesized from laboratory glass waste through the production of sodium silicate, followed by precipitation using HCl solution. …
This research aims to determine the influence of self-efficacy and communication skills on the learning outcomes of 11th-grade students in chemistry, both partially and simultaneously, at SMA Negeri 4 Pekanbaru. This type of research is a survey study with a quantitative approach. The data collection methods in this research include questionnaires and documentation. The questionnaire in the res…
This research aims to determine the influence of interpersonal communication skills and self-confidence on 10th-grade students' chemistry learning outcomes, both partially and simultaneously, at SMA Negeri 4 Pekanbaru. This type of research is a survey study with a quantitative approach. The data collection methods used in this study are questionnaires and documentation. The validated questionn…
The study aims to determine whether the application of the POE2WE learning model can improve students' learning outcomes on the topic of Acids and Bases. The research conducted was an experimental study using a Randomized Control Group Pretest-Posttest design. The experimental class was given treatment in the form of the application of the POE2WE learning model and the control class withou…
Learning problems in class XI-4 SMAN 12 Pekanbaru that need further attention include learning activities and scientific literacy skills. The results of pre-research in the even semester of 2023/2024 showed that students' learning activities on the indicators of asking questions were only 13.33%, conveying responses or opinions 6.66%, discussing 22.22%, and working on problems 22.22%. Likewise …
Kegiatan pembelajaran menjadi salah satu aspek krusial yang turut berperan penting sebagai bekal mahasiswa dalam menghadapi berbagai hal yang ada di kehidupan saat ini maupun di masa yang akan datang. Kegiatan pembelajaran yang baik tentunya tidak terlepas dari dukungan bahan ajar yang memadai. Bahan ajar yang dikembangkan secara tepat serta sesuai dengan kebutuhan dosen dan mahasiswa diharapka…
This study aims to improve learning activities and critical thinking skills of students by implementing the discovery learning model. This type of research is classroom action research. Data collection was carried out in January 2025. The sample in this study were 36 students of class XI 1 SMAN 6 Pekanbaru. The instruments used were observation sheets of student and teacher activities, evaluati…
This study aims to determine the improvement of student learning outcomes on the topic of chemical equilibrium through the application of the Osborn learning model. This research is an experimental study using a Randomized Control Group Pretest-Posttest design. The subjects were Grade XI students, consisting of a control class and an experimental class. Data collection was conducted using …
This study aims to produce a P5 module for making charcoal briquettes from leaf waste as an alternative fuel that is valid according to the aspects of content feasibility, language, presentation, and graphics. The type of research used is R&D (Research and Development) with a development model ADDIE (Analysis, Design, Development, Implementation and Evaluation). The data collection instruments …
This research aims to produce a valid E-LKPD and find out the user response to the developed E-LKPD. This research is designed using development research with a 4-D development model consisting of four stages, namely define, design, develop, and disseminate. However, this research was only carried out until the development stage. Research instruments in the form of validation sheets and user re…
The rapid development of information technology today has brought various changes to the world, especially in the world of education. Based on Government Regulation of the Republic of Indonesia Number 57 of 2021 concerning national education standards, Article 40 paragraph 1 states that the learning process must be supported by the use of information and communication technology (ICT) to suppor…
ABSTRACTABSTRACT ABSTRACTABSTRACT ABSTRACTABSTRACT Acrylonitrile Butadiene Styrene (ABS) Copolymer is a thermoplastic polymer material made by grafting technique between polybutadiene, latex, acrylonititrile, and styrene. ABS Copolymer is widely used as a frame for kitchenware, electronics, automotive, and toys. Currently, the need for ABS Copolymer in Indonesia is still mostly imported from o…
ABSTRACT Melamine is a chemical that has the formula C3H6N6 with another name 2-4-6 triamino 1-3-5 triazine. The need for melamine in Indonesia in the last five years was 133,803,190,000 tons. The main raw material in melamine synthesis is urea, which can be obtained domestically thanks to Indonesia's significant urea production. Establishment of a melamine factory to reduce the need for impor…
ABSTRACT Cumene is considered a basic chemical product because it is used as a raw material in the production of various other important chemical products. For one, cumene is used to produce acetone, which is the base material for various products such as solvents. Cumene is sold to subsequent chemical industries to produce plastics, resins, solvents, paints or other chemical products and …
ABSTRACT Ammonia is a compound formed from the bonding of hydrogen and nitrogen atoms which is a gaseous compound at ambient temperature that has a sharp odor and is stored in liquid form. The main use of ammonia compounds is as a raw material in making chemical fertilizers such as UREA and NPK. Apart from that, ammonia is also commonly used as a cooling agent and in the pharmaceutical field i…
ABSTRACT Paraxylene is an aromatic hydrocarbon compound with molecular formula C8H10. Paraxylene is used as a raw material for several end products such as pure terephthalic acid (PTA) or dimethyl terephthalate (DMT). Terephthalic acid (PTA) and dimethyl terephthalate (DMT) can be processed as materials for the plastic and textile industries. In addition, paraxylene is used as a resin mate…
ABSTRACT Polyvinyl Alcohol (PVOH) is one of the compounds classified in the group of acetylene derivative compounds. Polyvinyl Alcohol is made from polyvinyl acetate and methanol raw materials. The factory is planned to be built in Dumai City, Riau, Indonesia. Dumai City was chosen to facilitate access to raw material fulfillment. The PVOH factory was built with a capacity of 50,000 tons/year.…