The purpose of this study was to develop chemistry learning media based on autoplay media studio 8.0 to improve the communicative and collaborative character of students on acid-base material for class XI high school / MA equivalent valid according to experts so that it can be used in learning. Research is motivated by the lack of use of ICT-based media in the learning process in schools so…
This study aims to determine (1) the level of pedagogical competencies, professional competencies and attitudes in the use of ICT to the professionalism of chemistry teachers. (2) the differences of pedagogical competencies, professional competencies and attitudes in the use of ICT to the professionalism of chemistry teachers reviewed from the teacher demographics (3) the relationship of p…
Laccases (benzenediol: oxygen oxireductase, EC 1.10.3.2) are metaloenzymes that can catalyze the oxidation reaction of phenol compounds, amina and non-phenolic compounds. Laccase can be produced by Trichoderma asperellum LBKURCC1 through submerged fermentation with rice husk substrate, but with low activity. Production of laccase can be increased by using different fermentation methods, su…
The sulfate-activated Maredan clay catalyst has been successfully synthesized by reflux method with several variation concentrations of sulfuric acid (0.5, 1, 2 and 3 M) at 80-85 oC and followed by calcination temperature at 500 oC for 3 hours. Activation of Maredan clay with sulfuric acid was effective way to obtain impurities free of clay, increasing the surface area and acidity of the c…
The development of Moodle-based e-modules on the subject of hydrocarbons for class XI SMA / MA aims to develop valid learning resources from aspects of content substance, learning design, display (audio visual communication) and utilization. This e-module with the Moodle application has several advantages, the material presented in the e-module is more interesting because educators can include …
ABSTRACT Biodiesel is an alternative fuel that is environmentally friendly. The catalyst commonly used in making biodiesel is a homogeneous base catalyst that is difficult to separate from product. Therefore, it is necessary to develop catalyst technology that is more economical, easy to implement, and environmentally friendly, such as sulfonated carbon nanospheres@ferromagnetic catalyst. …
ABSTRACT The paper and pulp industry is very important economy in the Indonesian. This industry also wastewater produces which may harm our environment. This study aims to study the effect of variations in the speed of stirring coagulation using poly aluminum chloride coagulant (PAC) and ultrafiltration membrane operating pressure in the processing of pulp and paper wastewater. In the coag…
Abstract Sugarcane bagasse is one of the abundant, inexpensive agricultural wastes available as lignocellulosic biomass. Cellulose is the most renewable resource and has received much attention as a potential source of energy and carbon to produce useful products such as glucose. This study aims to determine the effect of variations in the ratio of bagasse: enzyme and temperature to the en…
ABSTRACT Spent bleaching earth (SBE) is a waste produced by the bleaching unit in the palm oil refinery industry. One of the efforts to tackle SBE waste is regenerated into regenerated spent bleaching earth (RSBE) which can be used as an adsorber of heavy metals in water waste such as Pb(II) from industry. This study aims to determine the characteristics of the SBE and RSBE, the adsorption…
ABSTRACT The pulp and paper industry on its activities is uses water in significant quantities, and it becomes a major component and determinant of product quality. High water consumption causes the pulp and paper industry to create large amounts of wastewater. Pollutants contained in this waste include suspended solids, color compounds, heavy metals, organic and inorganic substances, phen…
ABSTRACT Indonesia is a country with a growing human population, causing the need of energy also increases. Bioethanol has been widely used in transportation as a fuel that is increasingly reduced. Palm fruit fiber has a high enough potential to be developed into an alternative energy source, namely bioethanol because of its high lignocellulosic content. The purpose of this study was to de…
ABSTRACT The membrane is a selective and semi permeable layer between two phases, namely the feed phase and the permeate phase. Membrane synthesis uses silica for the treatment of Rhodamin B waste with variations of PVA 8, 10, 12, 14 ml with an operating pressure of 2, 3, 4 bar. This research produced a porous membrane. Characteristic tests conducted include SEM, flux and reflection analy…
ABSTRACT Jatropha curcas is used as a raw material for making biodiesel because the oil content of jatropha seeds is quite high around 30-50%. In this study, the transeterification of Jatropha oil into biodiesel has been conducted using La/Clay catalyst. This catalyst is made by clay activated using a NaOH base solution with concentrations 1N, 2N, and 3N and impregnated using metal La 1%, …
ABSTRACT Bioprocess is a biotechnology science that utilizes microorganisms to produce a biochemical product, one of which is an enzyme that can function as a catalyst. Enzyme requirements continue to increase along with the growth of the bioprocess industry. Cellulase and xylanase are enzyme products commonly used in industry, such as pulp and paper, detergents, food, textiles, and others…
ABSTRACT Corrosion is a degradation of metals quality caused by chemical reaction between metal and its ambient. The used of green inhibitor is a natural methods to control the corrosion rate of metal. The objective of this research is to count the efficiency of green inhibitor from tea and coffee extract, to find which variable that affect the most of corrosion rate of mild steel, to dete…
ABSTRACT The high reliance on fossil fuels such as crude oil, coal, and gas - causes exhaution on fossil resources ( crude oil, natural gas, and coal). Therefore, to resolve the fossil-fuel dependency, sago solid waste is converted into bioethanol as the renewable energy. On this research, the process of sago pulp fermentation is done by hydrolysis process and fermentation with the use of …
The aimed of the research was to improve students' learning achievement on the topic of environmental pollution in class VII of SMPN 32 pekanbaru. The form of the research was an experiment with a randomized control group pretest-posttest research design. The sample in this research was class VII2 as an experimental class and class VII3 as a control class that was randomly determined after …
The objective of this research was to develop the student’s worksheets based on the CORE (Connecting, Organizing, Reflecting, Extending) learning model in the subject of Equilibrium Ion and pH of Buffer Solution. The type of research was Research and Development method with the 4-D development model which includes Define, Design, Develop, Dissemminate. The research was only carried out at the…
The purpose of this study is to look at differences in student learning outcomes, see differences in student learning motivation and see the relationship between learning motivation and student learning outcomes by implementing NHT learning strategies in PBL learning models for the subject matter of acid-base in SMAN 4 Pekanbaru. The population involved in this study were all students of cl…
This study aims to produce teaching materials in the form of e-lkpd using the adobe acrobat 11 pro extended application which is valid for use in learning for high school students who need innovative ICT-based teaching materials to understand chemical materials that contain abstract and microscopic concepts. This research uses the Research and Development (R&D) method which refers to the Plomp …