This development research aims to produce LKPD based on learning cycle 7E on the subject of colloid systems, to determine the validity / feasibility of LKPD based on learning cycle 7E based on learning cycle 7E according to validators, to determine the response of users of LKPD learning cycle 7E according to teachers and students. The development model follows the plomp model. Plomp consists of…
ABSTRACT The level of LPG demand is increasing every year, even the import of LPG has been carried out for a long time, but the need for LPG has not been fulfilled, this has led to the establishment of a Dimethyl Ether (DME) factory to cover LPG needs in Indonesia. DME can also be used as a propellant in aerosol form such as hairspray, insecticide, and air freshener. The main raw material …
Methanol is the simplest form of alcohol with the chemical formula CH3OH. Methanol is commonly used for solvents, anti-freezing refrigerants, and fuels. Methanol is also an intermediate compound that is used as raw material for various industries including acetic acid, formaldehyde, MTBE, polyvinyl, polyester, and DME industries. The need for methanol in Indonesia continues to increase. The…
ABSTRACT Human life will not be separated from vehicles as a medium of transportation that makes it easier to move from one place to another. Until now, oil is the largest percentage of vehicle fuel providers. One of the important components in fuel from petroleum is additives. The addition of additives can produce fuel with a higher octane function as a booster, and also enhances the comb…
ABSTRACT Bioplastic characteristics are influenced by various parameters, including levels of cross linking agents (such as citric acid) and plasticizers (such as sorbitol). The purpose of this study was to study the effect of citric acid and sorbitol levels on mechanical properties, cross linking (characterized by ester groups), water uptake and biodegradation of starch-polyvinyl alcohol …
ABSTRACT Waste is the residue of human activities that form of solid waste. Waste needs to be managed to avoid having a negative impact. One effort to manage a waste is to make the transportation of waste. The purpose of this research is to evaluate the transport of waste and to make plans regarding the transport of waste in the Sukajadi District. Result of this research shows that dump tr…
The development of multiple representation-based LKPD is a student activity sheet designed with components at the science level, namely the macroscopic, microscopic and symbolic levels. The purpose of this research is to develop LKPD based on multiple representations on the subject of electrolyte and non-electrolyte solutions for class X SMA / MA as well as knowing the validity and response of …
Problem solving ability is one of the most important competencies for students to master. One of the factors that affect the problem-solving ability is the learning interest possessed by students. This research aims to find out the correlation between interest in learning and problem solving abilities of students. The research design of the study was quantitative descriptive survey research. Th…
The objectives of this research was to develop the character education-based module in the subject of chemical bonding. The type of this research was research and development (R&D) with the ADDIE development model consisting of Analysis, Design, Development, Implementation, and Evaluation steps. The data analysis technique was descriptive statistical analysis by calculating the percentage of va…
This Research aims to deveIop Student Activities Worksheets Based on Learning CycIe 7E on the thermochemicaI subject vaIid based on the feasibiIity aspect of content, aspect of Learning CycIe 7E characteristics, aspect of Ianguage and aspect of graphic. This study used Research and DeveIopment (R&D) method with ADDIE modeI which has five stages of deveIopment; they are anaIysis, design, deveIop…
This research aims to develop Student Activities Worksheet Based on MEA Model on the ionic equilibrium and pH of buffer solution material for grade XI SMA/MA. Student Worksheet Based are designed according to the stage of the MEA learning model. The type of this research is research and development (R and D) with reference to the development process of 4-D. The object of this research is studen…
The research aims to improve students' creative thinking skills on the subject of Ion Balance and Salt Solution pH in class XI MIA 1 SMA Negeri 12 Pekanbaru for the 2018/2019 academic year by applying problem-based collaborative learning. This type of research is a classroom action research using 2 cycles. Each cycle consists of two meetings covering four stages of implementation, namely planni…
Tamarind seeds are biocoagulants which contain active substances and are polyelectrolytes. This study aims to determine the slow stirring speed and stirring time in the removal of phosphate and TSS parameters in laundry wastewater and to compare the analysis results with the PERMENLH / 5/2014 quality standard. The removal was carried out by coagulation flocculation and sedimentation using …
ABSTRACT Biochar has the potential to improve soil physical and biological properties. Biochar has many pores that can absorb toxic compounds such as polycyclic aromatic hydrocarbons, so that it can reduce the toxicity in the soil. The purpose of this study was to determine the effect of increasing the dose of biochar from EFB on reducing TPH levels in petroleum contaminated soil. Biochar …
ABSTRACT The Production Laboratory of the Department of Mechanical Engineering, Riau University, has modified a diesel engine used as a used oil-fueled generator, the problem is that the emission feasibility test has not been carried out. The purpose of this study is to determine the calorific value of used motorbike oil and compare it with dexlite, to determine the relationship between th…
Palm trunk are agricultural solid waste which is still not optimally utilized. Palm trunk have a high starch content so that they can be used as raw material for making bioplastics, dextrins and adhesives. The hemicellulose hydrolysis experiment of starch-free palm trunk was conducted to study the possibility of the using starchfree palm trunk as raw material for the chemical industry, as w…
ABSTRACT Oil palm trunk is a solid agricultural waste that has not been optimally utilized. One of the uses of oil palm trunk is by taking starch to be used as raw material for making bioplastics and dextrins. This experiment was intended to study the possibility of using starch-free oil palm trunk as the alternative raw material in the pulp industry and to determine the delignification ra…
ABSTRACT Gasification of biomass converts biomass into gas fuel which can be used in conventional equipment such as boilers, engines and turbines or sophisticated equipment such as fuel cells as heat and electric generator. Simulation of the gasification of biomass is done by several approaches, one of them is a nonstoichiometric equilibrium model which is determined by minimizing free Gib…
ABSTRACT The use of LPG as a gas fuel is still needed by the community in various sectors, where in the future the needs of the community will increase as the industry progresses. One of the alternative fuels that can be developed as LPG substitution is Dimethyl Ether. Dimethyl Ether is produced through the process of synthesis and dehydration of methanol from natural gas. Natural gas is a…
ABSTRACT Palm kernel meal (BIS) is a side product of the processing of palm kernel into palm kernel oil. Palm kernel meal contains cellulose, hemisellulose and lignin. Palm kernel cake contains cellulose, hemicellulose and lignin which can be used as animal feed by fermentation. The objectives to be achieved in this research are the manufacture of animal feed from palm kernel meal and anal…