bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of protein metabolism electronic module by flip PDF professional application
Authors: Susanti T , Kurniadewi F , Nurjayadi M 
Published: April 2021

Abstract
The 21st century learning innovations must be optimized using appropriate media and learning resources. The use of technology has become an efficient alternative in the implementation of learning. This research aims to produce electronic-modules (e-modules) as teaching materials for protein metabolism using Flip PDF Professional application. The method used refers to research and development. The contents of the module are developed based upon the learning design in the Biomolecular Metabolism course according to the curriculum of the Chemistry Education undergraduate study program. In addition, the e-module is equipped with videos, images, animations, links to various main sources and formative tests on each material in accordance with the learning outcomes over the course. Product validation is carried out by material, language and media experts using standard instruments with the Likert scale. The results of expert validation of the developed e-modules show well to very good at interpretations. Based on the results from the validation it can be concluded that the electronic metabolism protein module is ready to be used as a learning material in supporting the improvement of students’ critical thinking. Dissemination of the e-modules in the biochemical learning process is being carried out and will be published in the next article.
Developing the Computer-Based Test (CBT) on the basic chemistry throughout a web-based application
Authors: Yunita L , Nurjayadi M , Hariwibowo H 
Published: April 2021

Abstract
Nowadays, the development of technology emphasizes the educators to be able to utilize the technology greatly in teaching and learning processes, including the learning assessment. In fact, the implementation of the technology, such as the utilization of an online-based test, seems to develop in the process of learning assessment. Hence, this present research proposes to develop the computer-based test (CBT) application for the comprehensive test of basic chemistry in measuring the higher order thinking skill (HOTS) of the undergraduate students in the major of chemistry education department. Furthermore, to facilitate their necessaries in optimizing the computer-based test (CBT) application, it seems to indicate that the application needs a new innovation in the certain parts in terms of the design itself and the simplicity of the online test that enables to be accessed either from the mobile phones or the students’ laptops. Notably, the development of the computer-based test application in the present research attempts to use the programming language PHP and MySQL in producing the database. Moreover, the author administrates five phases in promoting the application, such as developing the devices within the preliminary study, planning, creating the product design, testing the limited product, and revising the limited product testing. As the result, the findings of the research are expected to become the primary component in developing the online assessment. In other words, it enables to measure the learners’ competencies in comprehending the learning materials of basic chemistry and the higher order thinking skill for the undergraduate students of chemistry education department.
Effect of addition of white turmeric extract against antibacterial properties in edible film sweet potato starch and whey protein
Authors: Amalia V , Adipraja F W , Supriadin A , Khasanah N N , Junitasari A 
Published: April 2021

AbstractThe addition of white turmeric extract as an antibacterial to edible starch-based films aims to improve the resilience of food packaged against bacteria so that the quality is more maintained. The method carried out in this study consists of three things. The first step was the preparation and characterization of orange sweet-potato starch (including starch and moisture content). The second stage is the preparation and characterization of white Tumeric extract by phytochemical tests. The third stage is the preparation and characterization of edible films (including water resistance tests, mechanical properties tests. The result of starch characterization obtained the starch content of 43.16% with a moisture content of 13.95%. The result of the characterization of edible films by adding the best white turmeric extract was 7% with the tensile strength, and combined-successful elongation values were 40.9209 ± 2.5290 MPa and 18.03%. The results of antibacterial testing on E.Coli ATCC 11229 did not produce an inhibitory zone and on S. aureus ATCC 6538 was a clear zone but could not construct that indicates the presence of very weak antibacterial potential in edible films by adding white turmeric extract.
Utilization of e-module in polymer synthetic based on green chemistry to improve student high level thinking
Authors: Astuti D D , Rahmatullah S , Sukmawardani Y , Subarkah C Z 
Published: April 2021

Abstract
Increased thinking at a high level is needed so that students are able to solve the problems faced in their lives based on Islamic values. This study aims to analyze the improvement of higher order thinking skills based on Islamic values on the application of green chemistry-based synthetic polymer e-modules. The research design used was a one-group pretest and posttest with research subjects that were 26 semester VI students of the Chemistry Education Study Program. The results of this study indicate that the application of synthetic chemistry based on green chemistry e-module can improve the ability of high-level thinking based on Islamic values based on the average gain of n-gain 0.647 which is included in the medium category. Learning using this e-module can improve learning outcomes by making learning situations more active so as to better understand the concept of synthetic polymers based on green chemistry. Thus, the application of synthetic chemistry based on green chemistry e-module can improve the ability to think at a high level.
Developing renewable thermo-hydrothermic bioinorganic materials from bone wastes of slaughterhouses
Authors: Karyasa I W 
Published: April 2021

Abstract
Adding value of slaugtherhouses products and wastes today become greater attention, especially bone wastes for renewable biomaterials, in supporting sustainable green industries. However, the high potency of developing the renewable bioinorganic materials from bone wastes needs a comprehensive need assessment. The need assessment was conducted through three steps: literature search metaanalisis study for defining the needs, collecting and analysis data, and making decision of the needs. Results of the study showed that (1) there were prospective and sustainable raw materials from slaughterhouses in Indonesia, especially bones, for developing phosphate based bioinorganic materials; (2) there were some needs of developing bioinorganic nanoparticles materials in M-Si-P-O, M-Al-P-O, and M-Al-Si-P-O systems (with M = main and/or transition metals) for artificial bones and teeth purposes; and (3) there were some needs of developing thermo-hydrochromic bioinorganic materials sensoric temperature and humidity for supporting artificial insemination as well as medicinal purposes. The last result of the study was supported by current finding on natural inorganic thermo-hydrochromic pigment.
Effect of cooking time on the quality of nila nyat-nyat (Oreochromis niloticus)
Authors: Pandit I G S , Permtananda P A N K , Yudha K 
Published: April 2021

Abstract
The right time for cooking nila nyat-nyat is very influential on subjective and objective value of nila nyat-nyat. The goal of this study was to determine the best time in cooking tilapia in order to get the best quality of nila nyat-nyat. The research was conducted at the Laboratory of the Faculty of Agriculture, Warmadewa University and the Faculty of Food Technology, Udayana University. This research used experimental method with completely randomized design of single factors with 6 different treatments and 4 replications. Quality assessment includes subjective tests through organoleptic analysis such as appearance, texture, odor, and taste, and also objective tests or nutritional analysis, such as water, fat, protein, and ash content. Statistical analysis with anova showed that the difference in cooking time gave significant influence in the organoleptic quality and nutritional value of tilapia (p value < 0.01). From this research, we conclude the best time for cooking tilapia was 30 minutes.
Application of manure types in breeding several varieties of chili (Capsicum frutescens L.)
Authors: Yuliartini M S , Wirajaya A A N M , Assegaf A U R Z , Situmeang Y P 
Published: April 2021

Abstract
The study aims to determine the effects of giving several types of manures on various chili pepper varieties. The experiment is a factorial experiment using a randomized block design (RBD) consisting of two treatment factors, namely type of manure (R) of 3 levels: R1 = Chicken Manure, R2 = Cow Manure, R3 = Rabbit Manure and type of varieties (V) of 4 levels: V1 = Genie varieties, V2 = Dewata varieties, V3 = Sigantung varieties, V4 = Gendut varieties. The interaction of varieties and type of manure as a very significant effect on the number of leaves and root fresh weight and significant effect on fresh weight and oven-dry leaves. The highest fresh weight and oven-dry weight was obtained in the interaction of Genie varieties with cow manure, namely 10.06 g and 1.68 g with an increase of 285.44% and 342.10% compared with the interaction of Sigantung varieties with cow manure, namely 2.61g and 0.38 g. The highest fresh root weight was obtained in the interaction of Genie varieties with cow manure, which was 3.09 g or increased 286.25% compared to interaction between Dewata varieties and cow manure, which was 0.80 g. Genie varieties with cow manure types provide better chili seedling growth compared to Dewata varieties and Sigantung varieties.
Cellulase-producing yeast isolated from fermented cocoa beans as biocontrol for pathogenic mold chocolate fruit collected from Sentul, Jawa Barat, Indonesia
Authors: Sukmawati D , Sondana G A , Fikriyyah N N , Afifah Z N , Firhandini A , Khumaiya U , Komsiatun D A , Asmara Y T , Supiyani A , Puspitaningrum R , Ridawati R , Prihantini N B , Husna S N A , El Enshasy H A , Hanapi S Z , Dailin D J , Surono S 
Published: April 2021

Abstract
Mold is one of the microorganisms that can cause damage in chocolate fruit by producing phytopathogenic toxins. Until now, pesticides have been widely used for controlling postharvest loss in fruit. Yeasts can produce secondary metabolites, which can inhibit the growth of pathogenic mold. In this study, we isolate, identify, and apply yeasts isolated from fermented cocoa beans to control the growth of pathogenic mold in chocolate fruit collected from Sentul, Indonesia. This research includes yeast isolation using the dilution method with YMA medium, mold isolation using direct planting method on PDA medium, screening ability to produce cellulase using diffusion method on CMC medium, and in-vitro antagonist testing using dual culture method on PDA medium. The results showed that 128 yeast isolates and 37 mold isolates were obtained in this study. The results of screening representative cellulase capability of 77 yeast obtained 6 positive yeast isolates produced cellulase with the highest cellulolytic index of 0.23-0.30. The 6-yeast antagonism test with the highest cellulolytic index showed that C3.3.1 isolate had the best ability to inhibit pathogenic molds with 37.36% inhibitory power.
Environmentally safe technology with the conversion of used cooking oil into soap
Authors: Rahayu S , Pambudi K A , Afifah A , Fitriani S R , Tasyari S , Zaki M , Djamahar R 
Published: April 2021

Abstract
Cooking oil consumption in Indonesia is very high and tends to rise every year, reaching 500,000 tons/year. Waste of used cooking oil pollute water and reduces the biota. Therefore, the conversion of used cooking oil will help to reduce environmental damage. One of the conversions done is making the bulk cooking oil into soap. This study aims to determine the effect of NaOH concentration on the quality of soap made from purified used cooking oil. Activated charcoal from sugarcane bagasse was used in the conversion of soap to diminish odor and brown color. This study was designed using an experimental method with descriptive analysis. The treatment in this study was the difference in NaOH concentrations of 10%, 30%, and 50% with each concentration repeated three times. The results obtained showed that the most optimal NaOH concentration is 50% since it has a dense soap consistency. In contrast, the 30% NaOH concentration has a semi-solid soap consistency. At 10% NaOH concentration the consistency of soap is still liquid. It can be concluded that the concentration of NaOH affects the quality of the soap.
Assessing the feasibility of chemical laboratory safety videos
Authors: Fitriani E , Darwis Z , Ananda L R , Rahmadianty A , Paristiowati M 
Published: April 2021

Abstract
Laboratory activities are inseparable from learning chemistry. Consequently, chemistry students should master several skills in the laboratory, which they might not have it in secondary school. However, there are many potential hazards to be considered in activities in chemical laboratories. The lack of knowledge and experience of first-year chemistry students causes the possibility of accidents in the chemical laboratory higher. Therefore, in this study, chemistry laboratory safety videos were developed and assessed by experts, while questioners and interviews were used to collect the data. The assessment result is that the videos are feasible and ready to use after the input from experts and users are implemented in the developed videos.
Performance of neem (Azadirachta indica) seedlings on compost and urea fertilizer dose treatment
Authors: Widnyana I M A , Mahardika I B K , Suarta M , Kartini L , Yuliartini M S , Situmeang Y P 
Published: April 2021

Abstract
Neem (Mimba) is one of the types of plants that are the potential to be developed commercially as plantations and community forests. The purpose of this research is to find outperformance of neem seedlings on compost and urea fertilizer dose treatment. This experiment consisted of two factors arranged factorially using a Randomized Block Design. The first factor is the dose of compost with three levels, namely 200 g, 400 g, and 600 g per pot. While the second factor is the dose of urea fertilizer which consists of two levels, namely 2.5 g and 5 g per pot. The results showed that there was an interaction between compost dose and urea dose and had a very significant effect on root length per seed and significantly affected oven-dry weight per seedlings of neem. The highest root length of the neem seedlings of this experiment indicates that the doses of compost at a 200 g per pot and urea fertilizer of 2.5 g per pot was 28.00 cm and oven-dry weight of the roots of neem plant seeds was 2.81 g.
Physical quality of some types of grass on mixed planting with Arachis pintoi and organic fertilizing
Authors: Wawu F U K , Sudita I D N , S Rejeki I G A D 
Published: April 2021

Abstract
Increased livestock productivity is largely determined by the availability of sufficient forage. Good forage is determined by digestibility, which is related to physical quality. This study aims to determine the physical quality of several types of grass planted with Arachis legumes and the provision of organic fertilizer. This study used a Randomized Block Design with a factorial pattern consisting of 3 types of grass planted with Arachis legumes (factor A) and fertilizing 2 types of solid and liquid organic fertilizer (factor B) with 3 replications. The treatment combinations are: R1C (Paspalum notatum with Arachis pintoi+Compost), R1B (Paspalum notatum with Arachis pintoi+Biourine), R2C (Paspalum conyugatum with Arachis pintoi + Compost), R2B (Paspalum conyugatum with Arachis pintoi +Biourine), R3C (Axonopus compresus with Arachis pintoi+Compost), R3B (Axonopus compresus with Arachis pintoi+Biourine). The results showed no significant difference (P>0.05) both in the mixture of some grass plants with Arachis pintoi and the provision of organic fertilizer on the physical quality of forage. In planting a mixture of Axonopus comprsus grass with Arachis pintoi showed average dry matter (DM), water regain capacity (WRC), and water solubility (WS). Whereas compost gets higher average values than biourine for dry matter, WRC and WS. The combination of mixed planting and fertilizing, compost showed the highest average, especially water solubility (WS). From this research it can be concluded planting a mixture of grass and legumes fed with compost on average is better for the physical quality of the grass, but not significantly different (P>0.05) from all treatments.
Electroanalytical evaluation of antioxidant activity in monofloral honeys
Authors: Suliasih B A , Tawwabin R A , Budi S 
Published: April 2021

Abstract
The objective of this study was to develop an electroanalytical technique for the analysis of antioxidant compounds. Five different samples from five monofloral honeys were used. The electroanalysis experiments were conducted using two different techniques, namely cyclic voltammetry (CV) performed with a scan rate of 50 mV/s and differential pulse voltammetry (DPV) with a pulse amplitude of 50 mV and a scan rate of 10 mV/s. All samples were also analyzed by spectroscopy techniquesusing the 2,2-diphenyl-1-picrylhydrazyl (DPPH) microplate method. The electrochemical index determined using the DPV technique agreed with the spectrometric DPPH measurements. This resultdemonstrates that the electroanalysis method could potentially be utilized for antioxidant analysis of honey samples.
Isolation flavonoid compound chrysoeriol from ethyl acetate extract of zaitun leaves (Olea europaea)
Authors: Supriadin A , Juliani H , Tanyela N 
Published: April 2021

Abstract
The Olive Tree (Olea europaea) is a plant originating in the Middle East. Olea Europaea plant is contained several secondary metabolites such as olive oil, phenolic compounds, flavonoids, triterpen, biphenol. The aims of this research are to isolate and identify a flavonoid compound that extracted in the ethyl acetate of olive leaves. Isolation was carried out by meseration, liquid vacuum chromatography, column chromatography and thin layer chromatography. Isolation results obtained 10 mg isolates were identified using proton nuclear magnetic spectroscopy (1H-NMR) and carbon (13C-NMR). According to spectra analysis, describe that isolate is chrysoeriol.
The comparison characteristics of fermented Virgin Coconut Oil (VCO) on kefir addition
Authors: Karlina M , Windayani N , Helsy I 
Published: April 2021

Abstract
Indonesia is the largest coconut producing country in the world. They are many products from coconut that have high economic value, one of them is VCO. No research has been found in making VCO by kefir fermentation, so the purpose of this research is to describe the comparison of characteristics VCO produced on kefir addition based on organoleptic, water content, and free fatty acid tests. This research was carried out using two replications of the three old coconuts obtained 1.26 L thick coconut milk, then divided into three samples, fermented 48 hours with different treatments (0% kefir for control; 3.5%; 6% kefir). The results of this study obtained the best VCO characteristics in the composition of 3.5% kefir addition, colorless, normal taste, and aroma of coconut aroma, with water content of 0.0028% and a free fatty acid content of 0.23%. The VCO produced are in accordance with SNI VCO 7381: 2008. Further research needs to be conducted to produce an optimal VCO randement with a range of 1-3.5% kefir addition.
Dioscorea alata L anthocyanin extract methanol as a sensitive pH active compound
Authors: Safitri E , Humaira H , Nazaruddin N , Susilawati S , Murniana M , Md Sani N D 
Published: April 2021

Abstract
Anthocyanin from Dioscorea alata L has been successfully extracted using a methanol solvent and has been tested for its sensitivity to pH changes using a UV-Vis spectrophotometer in citrate and phosphate buffer solutions. The extracted anthocyanin showed positive flavonoid and phenol tests. The total yield of crude extract was 1.63% that is related to 3.34 x10−7 M or 16.72 mg/kg dried sample. The maximum absorption against citrate buffer is at a wavelength of 600 nm with a linear range toward pH 4 to 8, sensitivity = 0.121 and R2 = 0.98. Furthermore, the maximum absorption for phosphate buffer occurs at a wavelength of 590 nm that has a response linear in the range of pH 6 to 8 and sensitivity = 0.296 (R2 = 0.97) The optimum concentration of citrate buffer is 0.1M with a linear pH of 4-8 and sensitivity = 0.121 (R2 = 0.98). The optimum buffer concentration for both citrate and phosphate buffer solutions were reached at 0.1M and 0.075 M, respectively. The extracted anthocyanin showed stable response properties against citrate and phosphate buffer for 140 minutes during the test period. This anthocyanin is potential to be used as an active substance to developed optical pH sensors and biosensors based on the determination of pH change.
Molecular docking simulation of interaction between insulin and silica nanoparticle
Authors: Hertadi R , Ivansyah A L 
Published: April 2021

AbstractMolecular docking simulation has been done in this research by using Hex version 8.0 software package, respectively, to explore the interaction between insulin and silica nanoparticle. Silica nanoparticle acts as receptor and insulin acts as ligand in this research. It was found that insulin form more stable interaction when it is in the pore of silica nanochannel than on the surface of silica nanosheet. Insulin prefer to interact with silica atoms than oxygen atoms in the pore of silica nanochannel
RGB-ColorMeter on smartphones as a simple spectrophotometer: An alternative method of teaching spectrophotometry at the vocational high school of chemical analysts
Authors: Paristiowati M , Moersilah M , Nurjayadi M , Fitria A N 
Published: April 2021

Abstract
This study aims to improve students’ understanding at the Vocational High School of Chemical Analysts on spectrophotometric concepts through experiments using smart phone technology. For this research, The ColorMeter application with matching red green blue (RGB) colors is used as a simple spectrophotometry. The use of smartphone as a simple spectrophotometry in practicum can maximize spectrophotometric learning activities in the classroom since these are often constrained by the limited access to the instrument. Through finding an alternative method, learning objectives can be properly achieved and practical application is easily attained. This RGB – ColorMeter application can be used to read the transmittance of a colored solution by utilizing the complementary colors of the solution being tested. Transmittance data obtained is used to find the absorbance of the solution, so that it can determine the concentration of a substance in the solution. The results showed that the application of RGB - ColorMeter can show a linear graph between concentration and absorbance. The whole process is then carried out individually by each student starting from the stages of designing, utilizing, and reviewing this simple spectrophotometer. Students’ understanding of spectrophotometric concepts increases because each student follows the process thoroughly from the beginning to the final stages of the spectrophotometry practicum. Thus, it can be deduced that the application of RGB-ColorMeter can be used as a simple and accessible spectrophotometer in the spectrophotometry practicum at the Vocational High School of Chemical Analysts.