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841	Material Engineering	ABS-224
INTERIOR DESIGN OF NATIONAL LIBRARY WITH ENVIRONMENTALLY SUSTAINABILITY MATERIALS Hartini Laswandi (a, b)*, Basuki Wibawa (b), Robinson Situmorang (b), Raissa Fedora (a) (a) Design Interior, Universitas Tarumanagara Jakarta (b) Teknologi Pendidikan, Universitas Negeri Jakarta Abstract One of the goals of national library interior design is to facilitate the wider community who are looking for books to be more comfortable, more organized space organizations, to provide infrastructure for reading or seeking knowledge and to apply environmentally friendly materials into the interior. The interior library design besides wanting to improve the quality of functions, increase visitor interest, instill environmental care, this paper explores the evolution of design for sustainability (DfS), as well as fostering the empathic role of designers. The design research method refers to positive design. This article is based on data obtained using various qualitative research techniques, analysis of the application of environmentally friendly materials and analysis of interviews of environmental experts. This research presents an exploration of the librarys interior design with environmentally friendly materials supported by green light by utilizing natural light through transparent glass walls. It examines environmentally friendly materials, uses used wood, optimizes room openings. The design process for creating meaningful spaces - visual representations are displayed in the form of image layouts and spatial perspectives. The article concludes that interior design with the application of environmentally friendly and energy-efficient materials must continue to innovate in triggering and developing society towards awareness on sustainable nature conservation. Keywords: Interior design, library, environmentally sustainability materials Share Link | Plain Format | Corresponding Author (Hartini Laswandi)

842	Material Engineering	ABS-493
Characteristics Composite of Wood Powder, Coconut Fiber and Green Mussel Shell for Motorcycle Centrifugal Clutch Pads Ahmad Kholil, Siska Titik Dwiyati, Riyadi, Nugroho Gama Yoga, Arya Ibrahim Aji Department of Mechanical Engineering, Engineering Faculty, Universitas Negeri Jakarta, Kampus A Jl. Rawamangun Muka, Jakarta, 13220, Indonesia. Abstract This research is motivated by the need for environmentally friendly motorcycle centrifugal clutch pads. Utilization composites of wood powder, coconut fiber and green mussel shells for centrifugal clutch pads has not been much discussed in research. Centrifugal clutch functions to transmit power from the engine to the drive train with a centrifugal force mechanism. This study aims to determine the characteristics of the hardness, wear, coefficient of friction and microstructure of the composite. Composite material was made with three variations, namely specimen 1 consisting of 20% wood powder, 20% coconut fiber, 60% resin, and 0% shells. Specimen 2 made of 20% wood powder, 20% coconut fiber, 50% resin, and 10% shells. Specimen 3 is made from 20% wood powder, 20% coconut fiber, 40% resin, and 20% shells. All specimens were characterized by hardness testing according to ASTM E92 by the Vickers FV-300e. Each specimen was tested three times and the average data was taken. Wear resistance testing according to ASTM G99 by OGOSHI machine. Friction coefficient testing is based on the principle of friction in the inclined plane. While microstructure testing uses SEM by JEOL JSM-6510LA. The results showed that the composition of wood powder, coconut fiber and shell influenced the test results. Specimen 3 shows the highest value of hardness, wear and coefficient of friction compared to others so that it can be used for centrifugal coupling. Keywords: composite; wood powder; coconut fibre; shell; centrifugal clutch Share Link | Plain Format | Corresponding Author (Ahmad Kholil)

843	Material Engineering	ABS-1008
TURBIDITE DEPOSITS FEATURE AS HYDROCARBON RESERVOIR POTENTIAL IN BANYUMAS BASIN F Herdiansyah, M Burhannudinnur, D Syavitri Department of Geological Engineering, Faculty Technology of Earth and Energy, Universitas Trisakti Jakarta, Jakarta Indonesia Abstract The late Miocene sediment turbidite in Banyumas Basin Central java was examined to determining reservoir architecture and analogue. Active hydrocarbon systems are almost indisputable in Banyumas basin due to numerous oil seepage. This paper primarily focused on their characteristics, distribution pattern and predicting porosity-permeability of channelized-non channelized gravity flow deposit. There is interesting discussion about the effects of catastrophic events such as changes in facies turbidite that can be considered to influencing groups of porosity and permeability. The Measurable stratigraphic detail of 8 sections and the “helium porosimetry technique” was carried out on 30 sandstone sample. Porosity and permeability were prelimenary indication to reservoir potential. The lower-upper part of the formation gradationally are generally a siltstone-dominated, interbedded tufaceous siltstone, tufaceous sandstone and carbonate properties. Furthermore, this paper was comparing 5 deposits classification from Bouma sequence (1962), Mutti and Ricci (1972), Walker (1976), Emiliano Mutti (1999), as well as flysch and mollase. Sedimentary structures,textural and vertical succesion of each stratigraphic section were usefull paramaters to determining 5 classifications turbidite deposits. These sediment in the surrounding studied area was interpreted as clasical turbidite, channeled portion of supralobe fan, smooth to channeled portion of supralobe fan on middle-upper, smooth portion of supralobe fan on middle-upper. Keywords: Turbidite feature, Hydrocarbon potential, Banyumas basin, oil seep Share Link | Plain Format | Corresponding Author (RINI S DGM)

844	Material Science	ABS-1031
Effect of Aluminum addition on Ferro-Silica-Magnesium powder against hardness and corrosion rate with Mechanical Alloying methods Anggara B. S (a),, Mutia Delina (a)., Lucita (a) (a) Department of Physics, Faculty Mathematics and Natural Science, State University of Jakarta, Jakarta 13220 Abstract Has been made of Fe-Si-Mg powder alloy coated aluminum (Al) as an adhesive with variations in composition (0; 2.2; 6.0; 10.2) wt% forming Fe-Si-Mg-Al. Mixing powder is done by using mechanical alloying technique, namely wet mixing with ball milling use shaker-mill for 2 hours. After drying the sample is printed using a compression device with an 8-ton pressure for 3 minutes. Subsequent samples were given heat treatment or sintering in the tabular furnace at 10000C temperature detention for 2 hours, with a heating-rate of 50C/min and cooling-rate naturally up to room temperature. An XRD test was conducted to determine the phase formed and the SEM-EDX test to determine the morphological structure as well as the pattern of alloy composition spread. The results show the increasing content of Al hardness tends to decrease, while the increased content of Al corrosion-rate is increasing. This is due to the occurrence of oxidation of Fe binding oxygen forming Fe2O3, Si binding of oxygen forming SiO2 and Al binding of oxygen into Al2O3. Keywords: Mechanical alloying, Fe-Si-Mg-Al, corrosion-rate. Share Link | Plain Format | Corresponding Author (Anggara Budi Susila)

845	Material Science	ABS-520
ISOLATION AND CHARACTERIZATION OF CELLULOSE NANOFIBER FROM SUBANG PINEAPPLE LEAF FIBER WASTE PRODUCED USING ULTRAFINE GRINDING METHOD Hanif Amirulhakim (a), Ariadne L. Juwono (a*), Seto Roseno (b) a) Master Program of Materials Science, Departement of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Kampus UI, Depok 16424, Indonesia b) Centre of Technology for Materials – BPPT, PUSPIPTEK, South Tangerang, 15314, Indonesia *ariadne.laksmidevi[at]ui.ac.id Abstract Pineapple leaf fiber (PALF) is one of natural fibres that has high cellulose content. However, pineapple plants must be replaced with new plants once it is harvested, leaving the leaves as waste. In this research, the isolation and characterization of Subang based PALF were conducted. Chemical pre-treatments including alkaline treatment with Sodium Hydroxide and bleaching to remove nanocellulosic constituents such as lignin and hemicellulose were conducted. This process was followed by mechanical treatment using ultrafine grinder to produce cellulose nanofiber (CNF). Transmission Electron Microscopy (TEM) images showed that the CNF had 45-75 nm in diameters. The percentage crystallinity was determined by X-ray diffraction (XRD). The cristallinity values of raw PALF, treated PALF, and CNF were 74.97%, 76,29%, and 69.52% respectively. Fourier Transform Infrared (FTIR) spectroscopy analysis was carried out to investigate the chemical structure changes after both chemical and mechanical treatments. The presence of a peak that related to cellulose confirmed that the process was well conducted. These results indicated that PALF waste could become added value to agricultural waste and expected to become reinforcement agent in nanocomposite for structural application since PALF had low aspect ratio and had high percentage crystallinity values. Keywords: Cellulose nanofiber, Nanocellulose, pineapple leaf fiber waste, ultrafine grinding Share Link | Plain Format | Corresponding Author (Hanif Amirulhakim)

846	Material Science	ABS-9
Utilization of Bacillus circulans to Improve The Nutrient Quality of Rice Straw Biomass Wahidin Teguh Sasongko (a), Nana Mulyana (a), Nariswari Fidara (b), Etyn Yunita (b), Teguh Wahyono (a*) a) Center for Isotopes and Radiation Application, National Nuclear Energy Agency of Indonesia Jakarta 12440, Indonesia *teguhwahyono[at]batan.go.id b) Faculty of Science and Technology, Syarif Hidayatullah State Islamic University Banten, 15419, Indonesia Abstract Rice straw was an agricultural byproduct that has potential to be used as forage for ruminant. Ammoniated is technology, commonly to improve the nutrient quality of rice straw. Adding microorganisms to improve the process of rice straw ammoniation could be applied. The aim of this study was to improve the quality of ammoniated rice straw by adding Bacillus circulans and to know the best concentration of Bacillus circulans in ammoniation process. Completely Randomized Design with four treatments (0% B. circulans; 0.075; 0.1 and 0.125% DM of rice straw) and four replications was applied in this study. Incubation process was for 21 days. Results showed that ammoniated rice straw with B. circulans had improve the quality of rice straw such as increased ammonia (NH3). Ammoniated rice straw with 0.1% B. circulans was the best treatment with increased organic matter (OM) and decreased Neutral Detergent Fibre (NDF). Added 0.1% B. circulans was also increased crude protein (CP) and ammonia (NH3). Rice straw ammoniated by adding 0.1% B. circulans could improve nutrient quality and fiber utilility of rice straw biomass. Keywords: Ammoniation; Bacillus circulans; Nutrient quality; Rice straw Share Link | Plain Format | Corresponding Author (Teguh Wahyono)

847	Material Science	ABS-521
CHARACTERIZATION OF CELLULOSE NANOFIBRILS FROM EAST JAVA KENAF FIBERS PRODUCED BY ULTRAFINE GRINDING PROCESS Yunella Amelia Siagian (1), Ariadne L. Juwono (1*), Seto Roseno (2) 1) Master Program of Materials Science, Departement of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia 2) Centre of Technology for Materials - BPPT, Puspiptek, South Tangerang, 15314, Indonesia *ariadne.laksmidevi[at]ui.ac.id Abstract Cellulose is a fascinating biopolymer and sustainable raw material. Cellulose particles with at least one dimension in nanoscale are referred to as nanocellulose. This study presents the characterization of nanocellulose extracted from East Java, Indonesia based kenaf fibers. Kenaf fibers has a strong interfacial adhesion with polymer and superior properties over other natural fibers. This study was started by chemical pre-treatment for removing non-cellulosic components such as lignin, hemicellulose, and other components from kenaf fibers. The two step chemical pre-treatments consisting alkaline treatment with sodium hydroxide and bleaching or acid-chlorite treatment were conducted to the raw kenaf fibers. Then, cellulose nanofibrils (CNF) was extracted by mechanical disintegration using Ultra Fine Grinder. The evidence for the successful extraction of CNF from kenaf fibers was characterized by Transmission Electron Microscopy (TEM). TEM images showed that nanofibers had a diameter in the range of 40-70 nm. The crystallinity of the fibers was examined by X-ray diffraction (XRD). XRD analysis showed the percentage of crystallinity is increased from 75,75% in raw kenaf to 77,14% in bleached fibers, and decreased because of mechanical treatment to 68,75%. Fourier Transform infrared (FTIR) analysis was conducted on the raw fibers, bleached fibers and CNF. The FTIR results confirmed the success of extraction cellulose from raw kenaf fibers. All the results expected to support that CNF was a potential reinforcement material with a high surface area for a wide variety of applications. Keywords: cellulose, kenaf fibers, nanocellulose, cellulose nanofibrils (CNF), ultrafine grinding Share Link | Plain Format | Corresponding Author (Yunella Amelia Siagian)

848	Material Science	ABS-523
Aniline Concentration-dependent Surface Area of Emeraldine Salt Polyaniline Arum Ayuningsih1, Setia Budi1,*, Riser Fadiran2, Iwan Sugihartono2, Erfan Handoko2, Maria Paristiowati1 1Department of Chemistry, Faculty of Mathematics and Science, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, INDONESIA 2Department of Physics, Faculty of Mathematics and Science, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, INDONESIA Abstract This paper reports our study on surface area of emeraldine phase polyaniline prepared from different concentrations of aniline. The polyaniline was prepared using oxidative polymerization in room temperature. Fourier transform infrared spectrometer and X-ray diffractometer were used to confirm the formation of the conductive phase of polyaniline. The Brunauer-Emmett-Teller surface area measurement was conducted using surface area analyser. The results showed that a high surface area polyaniline was obtained at a relatively low concentration of aniline with the highest BET value of 33.44 m2/g. Keywords: Concentration-dependent surface area, emeraldine polyaniline, BET surface area, oxidative polymerization Share Link | Plain Format | Corresponding Author (Setia Budi)

849	Material Science	ABS-12
Electrodeposition of Ni-Nitride Composite Coating: A Review of Recent Study Esmar Budi1,2,*, Iwan Sugihartono1, Widyaningrum Indrasari1, Teguh Budi Prayitno1, Hadi Nasbey1,2 1Physics Program, Faculty of Mathematics and Science, Universitas Negeri Jakarta, Jl. Rawamangun Muka I, Jakarta 13220, Indonesia 2Physics Education Program, Faculty of Mathematics and Science, Universitas Negeri Jakarta, Jl. Rawamangun Muka I, Jakarta 13220, Indonesia Abstract This work point to a wide potentially on performance improvement of transition metal-based coating system especially Ni-TiN-AlN and Ni-TiN-AlN/Si3N4 composite coatings by using electrodeposition process. Electrodeposition is widely used in metal matrix composite for many industrial applications due to a relatively cheap solution to enhance the composite performance. The aim of this work is to study the influence of various current density and nitride particles concentration on corrosion behaviour of composite coatings. The corrosion test was performed by immersing the deposited composite samples into acid solution for 2 hours. The results showed that the mass loss rate of Ni-TiN-AlN composite coatings tend to increase as the current density was increased. Meanwhile, the mass loss rate of Ni-TiN-AlN and Ni-TiN-AlN/Si3N4 composite coatings tend to decrease as the nitride particles concentration was increased. However, in general, the corrosion resistance of Ni-TiN-AlN/Si3N4 composite coating was better than that of Ni-TiN-AlN. Keywords: Ni-Nitride composite, coating, electrodeposition, corrosion, current density, concentration Share Link | Plain Format | Corresponding Author (Esmar Budi)

850	Material Science	ABS-273
Status of research and development in the use of oil palm empty fruit bunches in Indonesia: Systematic Review Syukri M Nur1, Jusuf Firmansyah2, Erwin Susanto1, and Aep S Uyun 1 Renewable Energy Graduate Program, Darma Persada University. Radin Inten II, Pondok Kelapa Jakarta 13450. 2 Student of Renewable Energy Graduate Program, Darma Persada University. Radin Inten II, Pondok Kelapa Jakarta 13450. Abstract Empty fruit bunches (EFB) are one source of biomass that comes from oil palm industry. Research questions about how the status and development of EFB utilization research in Indonesia have been answered through a systematic review method that is assembled with the concept of bioenergy systems and the division of stages of the development of biomass technology initiated by the IEA-Task Bioenergy. The results showed that the EFB conversion was able to reach seven types of products: animal feed, soil fertilizers, planting media, fuels, lightweight construction building materials, raw materials to control water pollution, paper raw materials and the chemical industry. Even though the research dominance is still on the basic-applied R&D scale, the research has opened three new fields of study, namely (1) expanding the contribution of research contribution material to the aspect of sustainability; (2) developing the scale of research in the direction of demonstration, commercial commencement, even partnering with private companies to achieve commercial scale; and (3) opening up businesses and employment opportunities for the community who use these waste products into economic value products. Keywords: empty fruit bunch, bioenergy, biomass utilization, palm oil mill Share Link | Plain Format | Corresponding Author (Syukri MNur)

851	Material Science	ABS-276
Alstonia scholaris (L.) R.Br. Leaves Extract is not cytotoxic to Human Dental Pulp Cells Muhammad Ihsan Rizal, Indhra Cahyanita, Ferry Sandra Department of Biochemistry and Molecular Biology, Faculty of Dentistry, Trisakti University, Jakarta, Indonesia Abstract Introduction Alstonia scholaris leaves extract (ASE) has been investigated and suggested as a potential remedy for dental caries. However, to our knowledge the cytotoxicity study of ASE on dental pulp has not been reported yet. Therefore, current study was conducted to investigate the cytotoxicity of ASE on human dental pulp cells (hDPCs) Methods Alstonia scholaris leaves were collected, maserated and extracted with methanol. Meanwhile, human dental pulps were obtained from freshly extracted partial impacted third molar teeth. Pulps were digested with collagenase type I and collected human dental pulps cells (hDPCs) were cultured. ASE was applied to hDPCs in various concentrations (1000, 200, 50, 10 µg/mL) for 24 and 48 hours. MTT assay was performed to quantify viable hDPCs. Result Although high concentration of ASE was applied, high number of viable hDPCs was observed. Interestingly, in comparison with untreated group, low concentration of ASE (10 µg/mL) induced growth of hDPCs, especially after 48 hours treatment (p<0.05=0.019). In general, numbers of viable hDPCs treated with ASE in different concentrations for 24 (p<0.05=0.014) and 48 hours (p<0.05=0.016) were significantly different. Conclusion ASE does not induce cytotoxicity in hDPCs. In contrary, low concentration of ASE might induce the growth of hDPCs. Keywords: Alstonia scholaris, dental caries, maserated and extracted, hDPCs Share Link | Plain Format | Corresponding Author (Rini Setiati)

852	Material Science	ABS-794
Microstructural and Mechanical Characteristic of Ceramic Composite Coating Developed by Electrophoretic Deposition Resetiana Dwi Desiati1,2, Anawati1, Eni Sugiarti2 1 Department of Physic, Faculty of Mathematics and natural Science, University of Indonesia, Depok, Indonesia 2High Resistant Material Research Group, Research Center for Physics, Indonesian Institute of Sciences (LIPI), Serpong, Indonesia Abstract Ceramic composite consisted of Yttria Stabilized Zirconia (YSZ), Fe2O3 and aluminium powder has been successfully coated on inconel 625 substrate by electrophoretic deposition (EPD). A homogeneous of coating layer depends not only a stablity of EPD suspension but also an applied voltage. In the present study, constant voltage of 60V and gradient voltage of 30V followed by 60V during EPD process with total time of 6 minutes were applied in order to understand the effect of coating process on the microstructural and mechanical characteristics of ceramic composite coating. A fresh green body of ceramic coating was dried at room temperature for 24 hour prior to heat treated at temperature of 1200 C for 4 hour with heating rate of 2 °C/min using horizontal heated furnace under argon gas inert. Surface and cross-section morphology was characterized by FE-SEM (Field Emission-Scanning Electron Microscopy), while chemical content was analyzed by EDS (Energy Dispersive Spectroscopy). Hardness properties were tested by vickers hardness after heat treated samples using 500 gF for 13 second. Crystal phase formed on coated sample was characterized by XRD.The results showed that less porous structure was observed at gradien sampel which revealed that this sampel has higher hardness properties (787.76 HV) than constant sample (759.12 HV). In addition, phase formed in the YSZ + Fe2O3 + Al as ceramic composite coating was dominated by tetragonal phase of ZrO2. Keywords: Ceramic composite coating, YSZ, Inconel, Electrophoretic Deposition Share Link | Plain Format | Corresponding Author (Resetiana Dwi Desiati)

853	Material Science	ABS-797
Characteritation of Streptococcus agalctiae from subclinical mastitis cases in dairy cow Boky Jeanne Tuasikal, Tri Handayani, Dadang Priyoatmojo, Afi Candra Trinugraha, Totti Tjiptosumirat Centre of Isotopes and Radiation Application/ CIRA, National Nuclear Anergy Agency Abstract Subclinical mastitis (SCM) is a disease that often infects dairy cow, which then reduce milk production. Streptococcus agalactiae is well known as a dominant causative agent of SCM. An experiment to obtain characteristic of S. agalctiae from subclinical mastitis cases in dairy cows has been conducted. These isolates were examined using presumptive S. agalactiae of Christie, Atkins, and Munch-Petersen (CAMP) test and followed by Grouping test to identified it, which was cultured in soft agar (SA) and serum soft agar (SSA) to observed the capability at surface phenotype expression. Fifty seven positive Gram and negative catalase coccal bacteries were isolated from the process of identification, of which 34 were CAMP positive. From the serogrouping test of these, 14 isolates of S. agalactiae Group B were identified. Furthermore, 8 isolates are diffuse cultured in SA, while the remain 6 isolates are compact in SSA media. Keywords: Subclinical mastitis, S. agalactiae, CAMP and grouping test. Share Link | Plain Format | Corresponding Author (Boky Jeanne Tuasikal)

854	Material Science	ABS-1053
Contemporary Aesthetics Exposed Bricks In Building Facades And Interiors Leonardo Anindita Nugraha, Wegig Murwonugroho Design Magister Program, Art and Design Faculty, Universitas Trisakti Abstract Exposed bricks have become a trend on building design both in terms of façade and interior. It also considered as historical building identity in Indonesia. There is esthetical appearance which fall to contemporary side rather than tradition. There are several buildings that utilize bricks, yet failed to bring up aesthetic impression. It needs indicator or creative strategy on the arrangement of bricks composition. Design Thinking was used as the research methodology of this study. It was discovered that the principle of bricks arrangement still referring to Nirmana composition, and it needs more shape experiment, uneven composition and fantasy. The research also revealed the alteration of bricks function which no longer serves as divider, support or beam barrier into connecting chamber between spaces and manage to channel limited beam to create aesthetic ray of light. Keywords: exposed bricks, aesthetic, contemporary Share Link | Plain Format | Corresponding Author (RINI S DGM)

855	Material Science	ABS-309
Effect of Dietary Black Soldier Fly Larvae (Hermetia illucens) and Bioconversion Product of Cocoa Pod Husk on Performance and Hematological Profile of Sheep Rahman1,3,*, Erika B. Laconi2, Anuraga Jayanegara2, Dewi Apri Astuti2 1 Graduate School of Nutrition and Feed Science, Faculty of Animal Science, IPB University, Bogor 16680, Indonesia. 2 Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Bogor, Indonesia. 3 Department of Animal Science, Faculty of Animal Science, Halu Oleo University, Kendari, Indonesia. * Corresponding author’s e-mail: rahman[at]uho.ac.id Abstract Bioconversion of cocoa pod husk (CPH) is a biological processing technique using black soldier fly (BSF) larvae to improve the quality of the CPH while being able to produce added value in the form of BSF larvae as a protein source of animal feed. The aim of this study was to evaluate in vivo complete feeds containing BSF larvae and bioconversion product of CPH on performance and hematological profile of sheep. This study used a randomized complete block design (RCBD) with 5 treatments and 4 replications, so that total number of sheep used were 20 heads, conducted for 12 weeks period. The treatments were: R1 (complete feed, control without BSF and bioconverted CPH), R2 (5% BSF), R3 (20% bioconverted CPH), R4 (2.5% BSF + 10% bioconverted CPH), and R5 (5% BSF + 20% bioconverted CPH). The BSF and bioconverted CPH were used to replace soybean meal and coffee husk, respectively. Data were analyzed by analysis of variance and continued with a post-hoc Duncan’s test. Results revealed that replacement of soybean meal with BSF larvae and replacement of coffee husk with bioconverted CPH in the complete feed did not significantly affect performance of sheep, i.e., live weight gain, feed consumption and feed conversion ratio). Furthermore, different dietary treatments showed similar response on hematological profile of sheep. It can be concluded that BSF larvae and bioconverted CPH may be used to replace soybean meal and coffee husk, respectively, without any adverse effects on performance and hematological profile of sheep. Keywords: Cocoa pod husk, black soldier fly, bioconversion, sheep. Share Link | Plain Format | Corresponding Author (Rahman Rahman)

856	Material Science	ABS-60
A Paper-Based Colorimeter using Smartphone Light Sensor Ade Yeti Nuryantini,Umairoh Umairoh, Bebeh Wahid Nuryadin UIN Sunan Gunung Djati Bandung Abstract A paper-based colorimeter for absorbance and concentration measurement of the food coloring dye is proposed. The paper-based colorimeter system consists of a white LED as light source, paper-based cuvette holder, and smartphone light sensor. The paper-based colorimeter with smartphone light sensor is low-cost, mobile and real-time for the detection of coloring dye concentration. The detection response of the paper-based colorimeter system was found to be linear with the coloring dye concentration in the range from 0 to 0.025 g/mL with a correlation coefficient (R2) 0.89±0.04. The experimental results show that this paper-based colorimeter system is highly sensitive and have a potential application, from student labs to small industries. Keywords: paper-based colorimeter, absorbance vs. concentration relations, smartphone light sensor Share Link | Plain Format | Corresponding Author (Ade Yeti Nuryantini)

857	Material Science	ABS-1085
Study on the aluminum addition to the microstructure and mechanical properties of Cu-10Zn alloys produced by gravity casting Imam Basori*, Ikhwan Nuur Kahpi Ali, Sirojuddin and Siska Titik Dwiyati Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia *unimam_r_one[at]yahoo.com Abstract In this research, the samples of Cu-10Zn-xAl alloys were manufactured by gravity die casting process using Cu, Zn and Al ingots as the feeding materials. The aluminum addition was varied to 1, 2.5, and 4 wt. %, respectively. The as-cast samples with dimension of 100x100x6 mm3 were homogenized at temperature of 800 oC for 2 hours. Samples characterization includes chemical composition analysis, microstructure observation, tensile and hardness testing. The results showed that the addition of Al to the Cu-10Zn alloys significantly affected the microstructure and mechanical properties. The addition of 5.93 wt. % Al promotes the presence of β phase. Furthermore, the addition of Al to the Cu-10Zn alloy tends to increase the tensile strength, elongation and hardness. Keywords: Brass alloy; Cu-10Zn; aluminum; gravity die casting; homogenization Share Link | Plain Format | Corresponding Author (IMAM BASORI)

858	Material Science	ABS-575
Effect of Voltage Bias on Electrical Properties and Yield of Exfoliated Graphene Synthesized via Electrochemical Method Oktaviardi Bityasmawan Abdillah (a), Octia Floweri (b), Ferry Iskandar (a,b,c*) a) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia b) Research Center for Nanosciences and Nanotechnology (RCNN), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia c) National Center for Sustainable Transportation Technology (NCSTT), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia *ferry[at]fi.itb.ac.id Abstract Graphene has attracted immensely scientists over the world for its exceptional properties, which makes it promising for several applications such as energy storage, electronic devices, and biomedicine. Graphene synthesis via the electrochemical exfoliation route offers some advantages such as cheap, simple, eco-friendly, and scalable for industrial purposes. In this work, the effect of voltage bias during electrochemical exfoliation on the electrical properties and yield of the obtained exfoliated graphene (EG) was studied. Graphite sheet as raw material was pre-treated by immersing it into H2SO4/H2O2 mixture before the electrochemical process. By applying the optimum voltage of 10 V, the electrochemical method was able to produce EG with yield as high as 40.95% in a relatively shorter time. Moreover, EG also demonstrated the highest electrical conductivity of 25.45 S/cm. Keywords: graphene, electrochemical exfoliation, voltage bias, electrical properties, yield Share Link | Plain Format | Corresponding Author (Ferry Iskandar)

859	Material Science	ABS-581
The Influence of Microwave-Assisted Heating in the Solid-State Synthesis of LiNi0.8Co0.15Al0.05O2 (NCA) Putu Hendra Widyadharma (a), Octia Floweri (b), Ferry Iskandar (a,b,c*) a) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia b) Research Center for Nanosciences and Nanotechnology (RCNN), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia c) National Center for Sustainable Transportation Technology (NCSTT), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia *ferry[at]fi.itb.ac.id Abstract Various cathodes with high nickel content have been intensively investigated for their extraordinary great capacity and high-power Lithium-ion Battery (LiB). Among them, LiNi1-x-yCoxAlyO2 (NCA) is a promising type of nickel-rich cathode material with aluminum and cobalt co-doping as the structure stabilizer which provide better electrochemical properties and cyclability. NCA has been recognized as an excellent cathode material with high capacity of ca. 200 mAh/g and outstanding cycle life. For these reasons, NCA has become one of the promising material candidates to be applied as a battery component in Electric Vehicles (EVs). Among various method to synthesize NCA, solid-state method is often selected to achieve scalable industrial production. However, the solid-state process requires high-temperature heating for a relatively long time to attain homogeneous materials with excellent properties. In this work, we have been developing a novel synthesis route utilizing microwave-assisted heating to considerably reduce the heat treatment time. The obtained LiNi0.8Co0.15Al0.05O2 (NCA) was then characterized using X-Ray Diffraction (XRD) to assess the effect of microwave heating on the formation of crystalline structure of NCA. In addition, the analysis using Electrochemical Impedance Spectroscopy (EIS) and Charge-Discharge Testing system were also conducted to evaluate the electrochemical properties of the obtained NCA. Keywords: lithium ion battery (LIB), cathode material, NCA, solid-state synthesis, microwave-assisted heating Share Link | Plain Format | Corresponding Author (Ferry Iskandar)

860	Material Science	ABS-1093
ANALYSIS OF VISUAL DESIGN IN POCARI SWEAT TVC: “HIGH SCHOOL STAR” Fariza Elyumi Nur Indra Putri, Wegig Murwonugroho Design Magister Program, Art and Design Faculty, Universitas Trisakti Abstract Pocari Sweat is a Japanese drink product. Many of its television commercials (TVC) feature local and international talent in live action settings. One of the TVC run by Pocari Sweat is in Japanese 2D animation style (anime) titled “High School Star”. The commercial went viral due to its inclusion of Indonesian local culture in anime style. It is directed by Yoshitoshi Shinomiya, a famed animator from Japan. The commercial told a story of 2 high school students named Ayu and Reza chasing their dreams. “High School Star” is unique because it mixes two cultures, Indonesian characters and settings told in a Japanese animation style. Yoshitosi Shinomiya used environmental art approach to draw the settings. Yoshitosi interviewed Indonesian high school students and showed the colourful life of Indonesian children. 2D animation is made by traditional means. This paper aims to study character visual style, place settings, and creative strategy in planning with the intention of knowing the key visual acculturation style between Japan and Indonesia. Japanese anime style with Indonesian local culture. In production process, we see that they use Traditional Animation for moving characters, interviewing children for character profile, and Environmental Art for drawing place settings. Japanese animation usually uses Traditional Animation and Environmental Art for showing the surrounding places Keywords: Traditional Animation, Environment Art, TVC Share Link | Plain Format | Corresponding Author (RINI S DGM)

861	Material Science	ABS-328
Effect of Temperature and Additives of Carbon For Density And Porosity of Ceramic Membranes Based On Zeolites And Clays A S Budi, H Nasbey Universitas Negeri Jakarta Abstract Ceramic membranes based on zeolites and clays with additives of carbon has been made. The purpose of this study was to determine the effect of temperature and additives of carbon for density and porosity of ceramic membranes. In this study, ceramic membranes was made in five different compositions and used pressing methods to compact the ceramic powder that poured into a die and pressurized. The samples sintered at temperature of 350oC, 450oC, 550oC, 650oC, and 750°C for 3 hours. Based on SEM data, it is shown that ceramic membranes that contains coconut shell charcoal additives are preference have more porous and larger diameter. The results of EDS showed that ceramic membranes have compounds such as, Al2O3, SiO2, MgO, CaO, and K2O. From the data presented porosity and density, it can be concluded that pore formation and density of ceramic membranes is affected by the additive coconut shell charcoal and sintering temperature. More additives are added, then density decreases from 1.25 gr/cm3 to 1.04 gr/cm3, the greater porosity from 30.60% to 61.28% and the pore size increases from 20 μm to 65 μm. While, based on the sintering temperature, the higher temperatures that used for sintering made the density increased from 1.41 gr/cm3 to 1.57 gr/cm3, porosity decreased from 28.3% to 26.4% and the pore size increased from 25 μm to 65 μm. Keywords: membrane, additives, temperature, porosity, density Share Link | Plain Format | Corresponding Author (agus setyo budi)

862	Material Science	ABS-1105
Identification of characteristics Morphological and Genetic Relationships (Melastoma Sp.) in West Java liberty chaidir, tsara aulia, ahmad toufik, Noladhi wicaksana Uin Sunan Gunung Djati Abstract Melastoma (Melastoma sp.) is one of the weed types that have potential as a plant medicine. Melastoma have some content that is : Flavonoids, Steroids, Sapon, and Tan in wich to function as an antioxidant, anti-inflammatory, and antiseptic. Melastoma status as a weed influential on weed control and impact on the presence of melastoma . Then , need to do efforts to protection against plant remedy this by doing exploration . The purpose of this study was to determine and identify the diversity of melastoma plants and to determine the kinship between the accessions of melastoma plants in Majalengka Regency , West Java . The research is conducted in the District Majalengka regency Jawa Barat on in May - June 2019. The method that is used is the method of survey to conduct exploration into various sub- districts in the District Majalengka with the stages of pre exploration , exploration , characteristics and identifikas , collection , and if the data by using NTSYS . Diversity test using phenotypic analysis of variance and Kinship test using cluster analysis and major components (PCA). Results of the study showed that the 40 characters are observed , berkriteria area which means there is a diversity of phenotypes in plants Melastoma . Kinship plant Melastoma is far seen from a distance ecluidean 0 to 8 , 65 are divided into two clusters principal is Melastoma which grow in the plains low and in the plain high . Keywords: Exploration , phylogeny , diversity , Melastoma Share Link | Plain Format | Corresponding Author (liberty chaidir)

863	Material Science	ABS-338
Evaluation of Tripple Deck Transportation in Indonesian Local Sheep under Hot Humid Tropical Environment Lendrawati (ab*) , Rudy Priyanto (a), Anuraga Jayanegara (a), Wasmen Manalu (a), Desrial (a) a) Instititut Pertanian Bogor University Jalan Agatis Kampus Dramaga Bogor16680, Indonesia * len1303[at]yahoo.com b) Faculty of Animal Science Andalas University Kampus Unand Limau Manis, Padang Indonesia Abstract Unavoidable transportation as supporting factor in the livestock business is known as one of common cause of stress in animal. This study was conducted to evaluate transportation with triple deck system on body weight and some physiological stress parameters under hot humid tropical environment. Thirty indonesian local sheeps was used in this study which divided into three groups, deck 1 (D1), deck 2 (D2) and deck 3 (D3) of ten animals of each treatment. All animal was transported for 18 hours by using Grand max open roof pick up (Japan). The ambient temperature and relative humidity during study fluctuated betwen 29 and 34o and 74 and 93%, which indicated that the season was thermally stressfull and not favor for sheep transport. The results showed that body weight loss during transport from 10.77% to 14.12% with recovery rate 12-15 days. There was a significant increse of cortisol, glucose and rectal temperature after transportation. Deck 1 treatmen had higher of body weigh loss, cortisol level and rectal temperature than Deck 2 and Deck 3. It can be concluded that tripple deck transportation under hot humid tropical affected on body weight and physiological of Indonesian local sheep. Keywords: transportation, sheep, tripple deck, stress Share Link | Plain Format | Corresponding Author (Lendrawati Lendrawati)

864	Material Science	ABS-854
Effect of Growth Regulator 2,4-D and Kinetin on Durian (Durio zibethinus Murr.) Cimahi Landrace Bud Explant In Vitro Agung Rahmadi (a), Noladhi Wicaksana (b), Bambang Nurhadi (c), Erni Suminar (b), Liberty Chaidir (d), Siti Rakhmah Tenrisui Pakki (e) dan Syariful Mubarok (a)* (a) Master Agronomy Program, Faculty of Agriculture, Universitas Padjadjaran (b) Departement of Agricultural Cultivation, Faculty of Agriculture, Universitas Padjadjaran (c) Departement Food Technology, Faculty of Agricultural Industrial Technology, Universitas Padjadjaran (d) Agrotechnology, Faculty Sains and Technology, Universitas Islam Negeri Sunan Gunung Djati (e) Food and Agriculture Service, Cimahi City (a) Correspondence: syariful.mubarok[at]unpad.ac.id Abstract Kamajaya Durian (Durio zibethinus Murr.) is one of rare tropical fruit plants placed in Cimahi. The parent tree of Kamajaya durian is approx. 120 years old. As a landrace plant, it needs an effort to maintain its quality and quantity. This study was conducted to determine the effect of 2,4-D growth regulators and Kinetin to form callus on Kamajaya durian bud leaves in vitro. The research was conducted at the Plant Tissue Culture Laboratory of the Faculty of Agriculture, Universitas Padjadjaran, from October to December 2019. The research used factorial randomized block design in three replication and descriptive analysis method. The first factor was growth regulator 2,4-D consisted of 5 treatments i.e. 1 ppm, 2 ppm, 3 ppm, 4 ppm, and 5 ppm. While the second factor was Kinetin concentrations i.e. 0 ppm, 0.5 ppm, and 1 ppm. The results showed 2,4-D of 2 ppm, 3 ppm, 4 ppm, and 5 ppm as well as combination between Kinetin 0.5 ppm + 2,4-D 2 ppm, Kinetin 0.5 ppm + 2,4-D 5 ppm and Kinetin 1 ppm + 2,4-D 5 ppm gave an effect of bud leaves explant curled. Keywords: 2,4-D, Durian Kamajaya, Kinetin, Tissue Culture. Share Link | Plain Format | Corresponding Author (Agung Rahmadi)

865	Material Science	ABS-92
ALOE GEL for MAINTAIN QUALITY OF STRAWBERRY FRUIT Luh Suriati; Ni Made Ayu Suardani Singapurwa Warmadewa University Abstract Abstract. Strawberries are popular fruits and have high economic value. The nutritional content of strawberries is quite high but very easily damaged. One step to maintain the quality and extend the self-life of strawberry fruit is using edible coating. Aloe gel is one of the ordinary components that can be formulated into edible coating because contain glucomannan which is capable of forming cross linking with other ingredients, thus functioning as a barrier to mass transfer. This research aims to study the influence of additives against stability of Aloe gel as edible coating on Strawberry fruit so that it can maintain its freshness during storage The study uses a factorial complete randomized design and two repeats. The first factor is treatment of additives into Aloe gel (ascorbic acid, potassium sorbate, calcium chloride). The second factor is storage time of Strawberry fruit (0, 3, 6, 9, 12 and 15 days). The Ecogel treatment with the addition of ascorbic acid additives can retain the freshness of strawberry fruit until day 9. e in cold temperatures 7 ± 1C. Ecogel with ascorbic acid is able to suppress the weight, vitamin C, pH and total soluble solid and retain moisture content and strawberry fruit texture. Keywords: 1; aloe gels 2;quality 3; strowberry 4; edible coating 5; shelf life Share Link | Plain Format | Corresponding Author (Luh Suriati)

866	Material Science	ABS-352
Estimation of Carbon Stock in True Mangrove Stands in the Cipalawah Block of Sancang Sea Nature Reserve Garut West Java L. Amalia, Y. Juniarti, C. Ardiana, and I. D. Saputra Institut Pendidikan Indonesia Garut Abstract This research aims to determine the estimation of biomass, carbon stock, density, and CO2 absorption of true Mangrove stands. This is important to know how much the area of the mangrove forest is able to absorb CO2 from the air, so that it can support the areas sustainable management activities in relation to reducing the concentration of CO2 in the atmosphere. The research method used is a quantitative descriptive method with purposive sampling data collection techniques. Based on the research results obtained 6 types of mangroves namely Sonneratia alba, Rhizophora gymnorhiza, Aegiceras corniculatum, Avicenia marina, Bruguiera gymnorhiza, and Xylocarpus granatum. Based on the calculation using allometric equations, biomass results were 277.945 tons/Ha, estimation of carbon stock was 127.855 tons/Ha, true mangrove stand density was 737 individuals/Ha, and total CO2 absorption of true Mangrove stands was 1,019.131 tons/Ha. Keywords: Estimated carbon stock, density, true mangrove, CO2 absorption. Share Link | Plain Format | Corresponding Author (Lida Amalia)

867	Material Science	ABS-353
Carrying Capacity of Environment to the Life Potential of Rafflesia (Rafflesia patma Blume) in Leuweung Sancang Nature Reserve Garut West Java L. Amalia, A. S. Nursifa, D. I. Putri, and T. Kristianti Institut Pendidikan Indonesia Garut Abstract This research aims to determine the condition of vegetation around the Rafflesia environment, host conditions and population of Rafflesia, condition and population of Rafflesia, and environmental characteristics of abiotic component in Leuweung Sancang Nature Reserve. The method used is a quantitative descriptive method with a purposive sampling technique in which 4 circle plots of 0.1 Ha are made. The results showed that vegetation around Rafflesias environment was dominated by Ki kopi (Tarenna polycarpa) on tree vegetation, Ki barera (Tetrastigma leucostaphylum Dennst) on sapling vegetation, and Pereng (Ficus sp) on seedling vegetation. Species diversity is quite abundant (1.027) with species richness is classified as moderate (3.833) and species evenness is high (1.585). The host of Rafflesia, Ki barera (Tetrastigma leucostaphylum Dennst) was found as many as 9 trees with an average diameter of 4-15 cm. Rafflesia is overgrown on the roots of the top soil and stems. Found 34 knobs of Rafflesia with a mortality rate of 38.24% which is relatively low. Abiotic environmental conditions are very supportive of Rafflesias life. Thus the biotic and abiotic environment in Cipalawah block of Leuweung Sancang Nature Reserve supports the life potential of Rafflesia patma Blume. Keywords: Carrying Capacity, Life Potential, Leuweung Sancang Nature Reserve, Rafflesia patma Blume Share Link | Plain Format | Corresponding Author (Lida Amalia)

868	Material Science	ABS-1123
Analysis Of St-37 Metal Cutting With Machine-Cut Tools Using Oxy-LPG Ade Irvan Tauvana Politeknik Enjinering Indorama Abstract This gas cutting machine is a ST-37 metal cutting tool in a semi-automatic way using LPG and Oxygen gas materials. LPG gas is used with a composition of propane 99,5% and Isobutan 5%. In the process of cutting metal must pay attention to several parameters, namely: metal thickness, oxygen gas pressure and LPG gas and cutting speed. Before cutting down the metal, the preparation stage is done by conditioning the test equipment and work equipment used to collect test data. The method used in this research is to select the type of metal and cutting equipment then do the recording and taking test data. Further analysis and examination are carried out as follows: visual inspection of the results of cutting and flame shape, a better composition results from testing in accordance with applicable rules such as pressure, plate thickness and time of cutting. 99,5% and 0,5% LPG gas composition at gas working pressure: 0.2 kg / cm2; oxygen pressure: 2.5 kg / cm2, cutting distance of 2mm. The results of this test are overall in good condition and no defects occur. Keywords: LPG Gas cutting, Propane, Isobutane, Cutting speed, Oxygen Share Link | Plain Format | Corresponding Author (Ade Irvan Tauvana)

869	Material Science	ABS-876
Nature of Science Learning Design for Elementary School Students Nury Yuniasih(a*), Ari Widodo(b) (a) Elementary School Teacher Education Study Program, Universitas Kanjuruhan Malang, 48 Sudanco Supriadi Street Malang 65148 Indonesia *nuryyuniasih[at]unikama.ac.id (b) Faculty of Math and Science Education, Indonesia University of Education Abstract This study aims to describe the increased understanding of Nature of Science students after the application of the Nature of Science learning design. This study uses a pre-experimental research with a one-group pretest-posttest design research design. The number of samples in this study were 29 students. The research instrument used in this study was in the form of students NOS understanding questionnaire. The results showed that the level of understanding of NOS students got a percentage of 78% means that with this percentage students understanding of NOS is included in both criteria. And the results of the study also showed a significance value of 0,000 <0.05 then H0 was rejected and H1 was accepted so that it could be concluded that there were significant differences between students NOS understanding before and after learning by using the NOS learning design. In accordance with these results it can be concluded, the teaching of NOS in Elementary Schools can be done effectively through the use of appropriate learning designs, so as to improve students NOS understanding. Keywords: Nature of Science, NoS Learning Design, Students Understanding of NoS Share Link | Plain Format | Corresponding Author (NURY YUNIASIH)

870	Material Science	ABS-880
Fabrication of Biocompatible CaCO3/GO/CS Coating on Ti-6Al-4V Muhammad Jaka Surya (a*), Murni Handayani (b), Farid Triawan (a) (a) Department of Mechanical Engineering, Faculty of Engineering and Technology, Sampoerna University, Jakarta, Indonesia (b) Material and Metallurgical Research Center, Lembaga Ilmu Pengetahuan Indonesia (LIPI), Tangerang, Indonesia *jaka.surya[at]my.sampoernauniversity.ac.id Abstract Titanium and its alloy has been become the most common and favorite material for biomedical implant, especially Ti-6Al-4V. It provides excellent bio-compatibility, corrosion resistance and high mechanical strength. Ti-6Al-4V also has high strength to weight ratio, which is one of the most considered parameters in selecting implant materials. However, due to its potential of cytotoxicity and osseointegration issue, this alloy requires additional surface treatment to prevent direct contact to cellular tissues. One of the solution to modify the surface is by coating the alloy with bio-compatible and excellent nano-material such as graphene oxide. In this research bio-composite coating is composed of CaCO3/GO/CS and coating method that is used is dip coating. Keywords: Graphene oxide; Chitosan; Coating Share Link | Plain Format | Corresponding Author (Muhammad Jaka Surya)

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