High-speed separation, enrichment, digestion, as well as high-throughput analysis of biomolecules are very important in analytical and bioanalytical chemistry, biosciences, etc. for thesepurposes, currently a single piece of porous material so-called "monolith", Has been rapidly developed for Several...

Higher-level thinking skills in determining the topic and direction of policy is very important research related to the comprehensive benefit as a result of a study. The study is expected to provide comprehensive solution of social problems of his day so the presence of the results of research studies...

The chemical composition of three cajuput essential oils of Melaleuca cajuputi (M. cajuputi) from different area in Indonesia were analyzed using gas chromatography–mass spectrometry to determine the similarities and differences among their volatile chemical compositions. These cajuput oils come from...

Our effort in discovering new valuable organism, A newly bacterium was isolated from chicken feathers enriched soil. Microscopic and biochemical study as well as 16S rRNA gene analysis identified the bacterium as Pseuodomonas aeruginosa. Microbial growth study confirmed its capability to use chicken...

Dangerous substances in cosmetics have been widely known especially mercury face whitening. Socialization of the impact has also been made by NA-DFC (The National Agency of Drug and Food Control. However, the circulation of cosmetics contain contains mercury still exist on the community society. It needs...

Limited reserves of fossil fuels in the world, encouraging each country, the search for alternative energy sources is more urgent. One alternative to renewable energy is biodiesel produced from vegetable oil. Biodiesel is generally produced from the transesterification process of vegetable oils (triglycerides)...

Instant drinks are already a major requirement to fulfill human consumption in the era of globalization. According to the national health department, more than 5% of Indonesians consume instant drinks from various types. This figure is an opportunity for us to conduct research that produces quality drinks...

Research was carried out on the use of activated carbon from bagasse for processing laundry waste. The method used is the adsorption method with a variation of the length of contact between activated carbon and laundry waste. Laundry waste parameters analyzed included MBAS, phosphate, COD, BOD, TSS and...

In this research, the effect of coating composition (polyetherimide (PEI)) on the physical and mechanical characteristics as well as pure water flux (PWF) of the PSf/PEI composite membranes. The physical characteristics of membranes were analyzed based on the acquisition of surface and cross section...

In this study bovine bone material was cured with alkaline solution (calcium oxide) for 10, 30 and 50 days and extracted at three temperature levels (60 °C in extraction I, 70 °C in extraction II, and 100 °C in extraction III) each for 4, 5 and 6 hours. The results showed an increase in the percentage...

In this study, natural staining procedures have been evaluated using hybrid dyes of mango and turmeric leaves. To get rich color shades with high strength and color fastness, coloring is done by involving a number of preparation stages which include washing using Turkish Red Oil (TRO), mordanting using...

This research was conducted to obtain the procedure for the production of herb powder based on Indonesian local Kaempferia galanga commodities which have proximate as well as metals and microbes contamination level that meet the requirements in the Indonesian National Standard (SNI) 01-3709-1995. Blanching...

White frangipani (Plumeria alba) is a plan that is widely grown in Indonesia especially in Java and Bali. It has been conducted a research to know the chemical content of the plan leaf. The leaves of plant are extracted with dichloromethane solvent and then separated by using chromatographic techniques...

Pityrogramma calomelanos is fern in the Polipodiaceae family that grows in tropical Asia including Indonesia. This research aims to determine the molecular structure of phenolic compound isolated from the dichloromethane extract of the silver fern’s aerial part and toxicity activity test. The extraction,...

Hydroxyapatite (HAp) is the main material of bone structure which has chemical formula Ca10(PO4)6(OH)2. In this research, HAp synthesis use precursor calcium from crab shells and phosphate from H3PO4. Phosphate addition is done in single drop and wise drop. The calcinations of crab shell were done at...

Research with the title of the use of silica chitosan with glutaraldehyde crosslinking agents as a matrix in the making of slow release urea fertilizer has been done. The purpose of this research was to determine the physical and chemical properties of slow release fertilizer coated with chitosan-silica...

Syzygium malaccense or also known as Malay Apple is one of Myrtaceous plants. It is originally found in India and Malaysia. This plant has strong potential which can be traditional medicine. In the present study, it has been done an isolation the chemical components from dichloromethane extract of the...

Medicinal plants are one of the traditional medicines that are now often used by the community. One plant that can be used as a medicinal plant is guava (Syzygium malaccense). The plant is a Syzygium genus that grows a lot in Java. Several studies have shown that stem bark of the plant contain sapiens,...

A research has been conducted on development and physicochemical characterization of skin care cream containing essential oils of galangal. The skin care cream containing essential oils of galangal developed consists of a red galangal cream that utilizes the essential oil ingredients extracted from red...

A flavonoid compound namely kaemferol had been separated from the acetone extract of the silver fern (Pityrogramma calomelanos). It was obtained as yellow needles crystal with m.p. of 271-273 oC. Determination of its structure was conducted by the spectroscopic method and by comparison with reported...

Research is conducted to determine the chromium content in rice flour which is fermented with bakery’s yeast. The procedure involves several steps including sample preparation, fermentation, making crude bromelain enzymes, making YHE (Yeast Hydrolysate Enzymatic), and determining the chromium content....

Yacon (Smalanthus sonchifolius Poep p. Endl.) root is a source of inulin and fructooligosacharide (FOS) which potent as a prebiotic. Inulin and FOS hydrolyzed to glucose and fructans by inulinase which is secreted by probiotics bacteria and further metabolized to short chain fatty acids (SCFA) that were...

A composite membrane biopolymer chitosan filled fly ash was fabricated as alternative membrane electrolyte for fuel cell application. The membrane was synthesized from chitosan from deacetylation of shrimp shells and then cross-linked with sulfonic acid network by introducing fly ash. The aim was to...

It had been conducted research on characterization the mechanical properties of biodegradable plastic composites from HDPE (High Density Polyethylene) and gembolo starch. This study aims to determine the mechanical characteristics of biodegradable plastic made from a mixture of HDPE and gembolo starch....

This study is conducted to determine a steroid compound from the dichloromethane extract of matoa’s stem bark (Pometia pinnata) and toxicity assay against Artemia salina Leach. In this reseacrh, extraction was carried out by maceration, separation by chromatography, purification by recrystallization,...

This research has been done by synthesizing graphene oxide as a working electrode using Hummer method. Aim of this study is comparing capability of electron transfer within electrode. This can be done with using composition of working electrode by mixing synthesized product and organic glue paraffin,...

This research has been done by testing the adhesive firmness of resorcinol formaldehyde from Johar sawdust extract. This study aims to determine the best adhesive characteristic made of the mixture of Johar sawdust extract with resorcinol and copolymerized with formaldehyde. The composition comparison...

The purpose of this research are to know the influence of learning models (PDEODE and 5M) and critical thinking skills on students’ chemical literacy. The population of the research were students of State Senior High School 5 Jakarta. The research instrument used are critical thinking test and chemical...

This study aims to describe the learning process and the students’ self-regulated learning through the implementation of the problem-based learning model. The obtained data were analyzed using quantitative descriptive approach. Results showed that: (1) The implementation of problem-based learning model...

The challenge of education in Indonesia today is to guide students into a literate generation, a generation that is sensitive and concerned about the environment and issues that are happening. To be a human who has good information literacy, all we needs to be done is reading habits. Permendikbud No...

This research aims to develop a valid teaching instrument. The developed teaching instruments oriented problem solving to train students’ metacognitive skills at acid base titration topic. The specifications of instruments included the syllabus, lesson plans, student worksheets, and tests. The problem-solving...

This research is a classroom action research that aims to improve the learning outcomes of chemistry of the eleventh grade students of SMA Negeri 1 Tanah Miring and SMK Negeri 1 Tanah Miring on the of colloid topic through the application of chemical supplement books based on Asmat Tribe's local wisdom....

this research aims to produce a valid teaching material. The developed teaching materials used inquiry learning model integrated with STEM to trill students' critical thinking skills on Thermochemistry topic. The specifications of product included the syllabus, lesson plan, Student Worksheet, Student...

The purpose of this research are (1) to know the differences of students learning outcome who are taught using problem based learning model with animation media with problem based learning model without animation media and conventional learning on chemical bonding topic (2) to know the differences of...

The purpose of this study is development the Student Worksheet based on theoretical and empirical feasibility. The theoretical feasibility of the Student Worksheet is based on the feasibility of the content, language, presentation and graphics. The empirical feasibility of the Student Worksheet is reviewed...

This study aims to describe the shifting patterns of pre-service teachers’ conceptions on the material of colligative properties of solutions. The occurred misconceptions were then overcome using metacognitive learning strategy. The pre-service teachers’ conception status was determined by the results...

This study aims to determine, students' learning styles, the improvement of learning outcomes, and student responses to interactive multimedia. The Interactive multimedia “ChemTutor” in balancing redox reactions to be applied in research class. The results of this research showed that from 15 students...

This Actual global problem in this time is decreasing of environment quality. Some effort had been done to solve this problem as well as through education by designing lesson as an alternative to implement green chemistry principles. The aims of this study that discussed in this article were; 1) analyze...

Sorogan-Bandongan is an integrated lecture model coming from the traditional learning that are implemented at Islamic boarding school in Indonesia. It starts with Sorogan and ends with Bandogan. The implementation of integrated lecture model of Sorogan-Bandongan with stages of students reading and doing...

The aims of the research is to describe the feasibility of student worksheet science literacy oriented in acid-base matter assessed from criteria the validity, practicality, and effectiveness. The type of research uses 4D development method that limited until development stage (Develop). The instrument...

The aim’s of this research was to develop The Adventure of Element based on Role Playing Game as a learning media on element chemistry matter. The feasibility of a game that developed assessed from criteria the validity, practicality, and effectiveness. This research used Research and development (R&D)...

This research has the objective to determine the feasibility of virtual laboratory-based blended learning developed in the materials of inorganic chemistry of main group elements in terms of the validity of the   quality of the content and purpose, construct, instructional, and technical. The type of...

Higher order thinking skills (HOTs) are needed by the students of chemistry education, because they will become teachers who will be teach HOTs for students. This research is research and development. this study has the aim to examine the feasibility of developing concept map learning models with inquiry...

This study aims to describe the validity and practicality of developed scientific literacy worksheets. The validity of worksheets is reviewed based on contents and concepts, while the practicality of the worksheet is reviewed based on student responses supported by observations of student activities. This...

This study aims to describe the learning outcomes of multiple intelligences (visual-spatial and linguistic intelligence) of students who are raised with inquiry learning model that is guided on the reaction rate material at SMAN 1 Krian Sidoarjo. This type of research is pre-experimental with One group...

This study aims to produce learning tools that are feasible to be used in the learning process. Learning tools developed are oriented towards guided inquiry models that aim to train students' scientific literacy skills. Learning tools consist of syllabus, lesson plans, student worksheets, and assessment...

This study aims to describe the implementation of interactive multimedia and student activity sheets with writing-to-learn (WTL) strategy for hearing impairment students in chemistry subjects in the household. Multimedia interactive were implemented to 9 students Jember Senior high School of hearing...

This study aims to determine the feasibility of developing Anti Miskim software to reduce misconceptions of students of class X in chemical bonding material. This type of research is a development research that develop Anti Miskim software on chemical bonding material and research design used is R &...

This study aims to obtain a game of Wind's Maze Chemistry based on android which is suitable to be used as learning media on main Hydrocarbon subject for eleventh grade of Senior High School’s based on the validity, practicality, and effectiveness of the game. The type of this study uses research and...

Lecturer usually uses media in order to help students’ understanding about organic chemistry. In this research, the aim is to find out the ability and perception of students in learning by using media in the form of online and offline. The offline media we used was namely Spartan Student V6, and ChemAxon...

This research aim for measured success train ecopreneurship college student through design game as a learning medium chemistry on game media course chemistry. On media courses game of chemistry, college student divided in groups given task project for compile plan ICT game as a learning media of chemistry....

Learning synthetic organic chemistry has several stages of the learning material that should be followed by students. One of the importance stages in learning organic synthesis is the disconnection stages. This study aims to be able to find out the improvement of students’HOTS through learning stages...

One of the causes of misconception in chemical studies is mental models. Mental models are students' initial abilities which consist of perception, understanding discourse, and imagination ability. This study aims: (1) to determine the level of student understanding in understanding the concept of atomic...