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1	Chemical Engineering	ABS-1037
Effect of acid concentration on extraction of microcrystalline cellulose from pineapple crown leaf Fitriani(a), N A Sri Aprilia(b*), N Arahman(b), and M R Bilad(c) a) Doctoral School of Engineering Science, Universitas Syiah Kuala, Jl. Tgk. Syech Abdul Rauf No. 7 Banda Aceh 4326, b)Department of Chemical Engineering, Engineering Faculty, Universitas Syiah Kuala, Jl. Tgk. Syech Abdul Rauf No. 7 Banda Aceh 4326, c)Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia Abstract Microcrystalline cellulose was extracted from pineapple crown leaf waste. Pineapple crown leaf is a renewable agricultural residue which is use very rarely as an alternative material. Microcrystalline cellulose was extracted from this waste through sulfuric acid (H2SO4) hydrolysis with different concentrations. Pineapple crown leaf was hydrolyzed for 2 hours at 45℃ along with various sulfuric acid concentrations (1, 2, and 3 M). The effects of the acid concentration on the morphologies and properties of the cellulose were evaluated by Scanning electron microscopy (SEM), Fourier transforms infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The SEM images showed that the microcrystalline cellulose produced by different sulfuric acid concentrations had a rod-like shape and different sizes. The FTIR analysis showed the removal of non-cellulosic constituents and the chemical compositions of all the samples were the same and represented the cellulose I structure. Various acid concentration impacted on the crystallinity index and crystal size of the microcrystalline cellulose, as was revealed by the XRD analysis. The produced microcrystalline cellulose from pineapple crown leaf waste had better thermal stabilities. Keywords: Microcrystalline cellulose, pineapple crown leaf, acid concentration Share Link | Plain Format | Corresponding Author (Fitriani -)

2	Chemical Engineering	ABS-36
POTENTIALS OF BLOOD BAGS (WHOLE BLOOD) TOWARDS THE QUALITY OF HIV PRE TRANSFUSION TEST RESULTS: EARLY STUDY IN REGIONAL GENERAL HOSPITAL DR. BEN MBOI RUTENG MANGGARAI DISTRICT, EAST NUSA TENGGARA PROVINCE Yani Suryani (a)*, Opik Taupiqurrohman (a) (b), Yohanes Reynerius (b) (a) Department of Biology, Faculty of Science and Technology UIN Sunan Gunung Djati Bandung * yani.suryani[at]uinsgd.ac.id (b) Department of Chemistry, Concentration of Medical Analyst at the High School Analyst Bakti Asih Bandung Abstract The existence of cases of HIV transmission in patients with kidney failure after receiving a blood transfusion of 47 bags in dr. Ben Mboi Manggarai Regency, NTT Province encourages research related to potential changes in blood quality during storage. This research uses immunochromatography methods. The treatment in this study was the variation of blood bag storage in 2 weeks, 3 weeks, 4 weeks and 5 weeks. The initial determination of storage is from the initial blood donation. The examination was also carried out at the beginning of the donated blood according to the standard operating procedure of the blood donor. The results showed that there was a change in the quality of blood samples during storage. There are samples that turn HIV positive Keywords: HIV; Duration of Storage; Blood Bag; East Nusa Tenggara; Transfusion Share Link | Plain Format | Corresponding Author (Yani Suryani)

3	Chemical Engineering	ABS-551
The study of palm kernel shell updraft gasification for supplying heat to an asphalt mixing plant Sunu Herwi Pranolo*, Hidayat, Winda Permata Hati Study Program of Chemical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Jl. Ir. Sutami 36A, Surakarta, INDONESIA 57126 * sunu_pranolo[at]staff.uns.ac.id Abstract Both Cold Gas Eficiency (CGE) and Carbon Conversion Efficiency (CCE) are the common performance indicators of a gasification process. The evaluation describes optimum results of producer gas calorific value and the amount of converted carbon in biomass into CO, CO2 and CH4 from a unit mass of feedstock which is gasified using certain gasifying agent in any type of gasifiers. This study examines palm kernel shell air-gasification in an updraft fixed-bed gasifier for aggregate heatingup with producer gas combustion in an asphalt mixing plant. It was observed that at feedstock flowrate of 990 kg/hour and equivalence ratio range of 0.04 - 0.11, the gasifier generated the same solid residue of 299 kg/hour. With equivalence ratio of 0.04, 0.06, and 0.1, this palm kernel shell gasification performed carbon conversion efficiency of 52%, 53% and 60%, and cold gas efficiency of 18%, 21%, and 33% respectively. Keywords: palm kernel shell, updraft gasification, cold gas efficiency, carbon conversion efficiency, asphalt mixing plant Share Link | Plain Format | Corresponding Author (Sunu Herwi Pranolo)

4	Chemical Engineering	ABS-811
Study of triacetin selectivity by glycerol esterification using solid catalyst based on silica from bamboo leaf Maysa Fitri (a), M. Marwan (a*), Yanna Syamsuddin (a), Nanda Suriaini (a) a) Universitas Syiah Kuala Jalan Syech Abdur rauf No 7, Banda Aceh 23111, Indonesia *marwan[at]unsyiah.ac.id Abstract Synthesis of triacetin from glycerol with acetic acid was performed over an acid catalyst. Triacetin usually use as bio-additives for transportation fuel for increasing octane number. Development of solid catalyst based on natural resources, bamboo leaf was studied. This catalyst were prepared by activation with strong acid (HCl) then characterized by X-Ray diffraction (XRD). Based on XRD analysis, impurities were decreased and percentage of silica was increased from 52% to 75%. The effects of molar ratio of glycerol/acetic acid, catalyst loading and reaction time was investigated for triacetin production. Selectivity of triacetin was analyzed with Gas Chromatography Mass Spectroscopy (GCMS) and the result was 4% for 1:8 mol ratio of glycerol/acetic acid, 5% of catalyst loading. With assistance of microwave, the durations of esterification can be shortened effectively to 60 minutes than conventional method up to 24 hours. Keywords: triacetin, glycerol, esterification, microwave, bamboo leaf Share Link | Plain Format | Corresponding Author (Maysa Fitri)

5	Chemical Engineering	ABS-47
DEVELOPING SIMPLE DISTILLATION KIT FOR GREEN CHEMISTRY ORIENTED ORGANIC LIQUID WASTE RECYCLE Sari 1, Maya Amelia2 dan Neneng Windayani3 1Program Studi Pendidikan Kimia, Fakultas Tarbiyah dan Keguruan, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. A.H Nasution No, Kota Bandung, 40614, Indonesia Abstract This research was aimed to describe the development of a simple distillation KIT for green chemistry oriented organic fluid waste recycling, to analyze the results of validity and feasibility tests towards the KIT and to analyze the results of the distillation KIT optimization and the distillate purity test using refractometer. The research and development method was employed, consisting of analyzing problems in the field, planning the design and the guidebook, preparing the materials and apparatus, and conducting the development phases, starting from the experts’ validation towards the product to the limited product testing. The research was well conducted, producing a valid, feasible product which is made from safe materials, easy to use, cheap to build and provides interesting features. The instruments employed in this research were flowchart, storyboard, product validation and feasibility sheets. The product’s purity was tested using the distillate generated by separating liquid waste which contained organic solvents such as methanol, water and ethyl acetate. Keywords: Green chemistry, KIT distillation, purity of distillate, organic fluid waste Share Link | Plain Format | Corresponding Author (Sari Sari)

6	Chemical Engineering	ABS-313
Making Of Chemistry Chess Media For Coloid Material Ahmad maulana, Sari Sari dan Cucu Zenab Subarkah 1Program Studi Pendidikan Kimia, Universitas Islam Negeri Sunan Gunung Djati Bandung, Indonesia Abstract Abstract. The main objective of this study is to provide a summary of the steps in making the Chemistry Chess media on the concept of colloids. Descriptive research method is used to analyze the steps in making Chem Chess media on the concept of colloids through flowcharts and storyboards. Flowcharts and storyboards are described based on the steps of making Chem Chess media on the colloid concept. This research produces a learning media that needs to be applied to the concept of colloids by providing a guidebook as well as 3 types of knowledge cards, question cards, and challenge cards, which correspond to them at different cognitive levels. The colloid concept used contains learning indicators that are determined in general. Keywords: Chem Chess Media, Colloid Material Share Link | Plain Format | Corresponding Author (Sari Sari)

7	Chemical Engineering	ABS-584
Making stacking block chemistry educational game on hydrocabon material Sindy Alriyanti1, Riri Aisyah2, Sari Sari3 Program Studi Pendidikan Kimia, Universitas Islam Negeri Sunan Gunung Djati Bandung Abstract This research uses a descriptive method to produce an educational game stacking block chemistry (stacko) on hydrocarbon material. This research is driven by the importance of a media that can provide challenges to students through a game. The main objective of this research is to provide an overview of the steps in making a stacko educational game through flowchart and storyboard. Flowcharts and storyboards are described based on the steps in the making of the educational stacko game on the hydrocarbon materials. This research resulted in an educational game that has the potential to be applied to hydrocarbon materials with a guidebook, and a player scoreboard. There are questions about hydrocarbon materials in this game with different cognitive levels, hydrocarbon materials in this game is an 11th-grade high school chemistry materials that accordance with the curriculum. Keywords: Educational games, stacking block, hydrocarbon Share Link | Plain Format | Corresponding Author (Sari Sari)

8	Chemical Engineering	ABS-841
Engineering Bagasse Waste into Cosmetic Mask Sri Rahayu (a*), Arief Prasetiyo (a), Maharani Dewi Gita Asmara (a), Ni Putu Laksmi (a), Meilindah Putri Pamilih (a), Zaky Hammam (a) (a) Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Indonesia *srirahayu[at]unj.ac.id Abstract Aloe vera (Aloe vera (L) Webb) in the world of beauty is a plant that has many properties on the skin. One of the benefits of aloe vera in the cosmetics industry is as an antibacterial. Anthraquinone contained in this plant has antibacterial activity that causes acne (Staphylococcus aureus). In addition, activated charcoal is also a trend in some beauty products that can facilitate various impurities on the facial skin. However, the use of activated charcoal with bagasse has never been done research on beauty products. Therefore, this study discusses variations in the concentration of HPMC in aloe vera gel and the concentration of activated charcoal bagasse on the antibacterial activity of Staphylococcus aureus. Making aloe vera gel is by extracting aloe vera leaves with 75% ethanol solution using maceration method. Aloe vera gel uses an empathic formula that differs in HPMC concentration. Activated charcoal added to aloe vera with three different concentrations has the aim of seeing optimal concentration. Tests in this study discuss the test of physical properties (organoleptic, pH, viscosity, and credibility) and antibacterial activity test by measuring the inhibition zone using the diffusion method. Keywords: Aloe vera; Activated charcoal; Gel; Antibacterial; Staphylococcus aureus. Share Link | Plain Format | Corresponding Author (Arief Prasetiyo)

9	Chemical Engineering	ABS-600
Potential Bioplastic Material from Food Waste to Promote Environmental Sustainability Muhammad Oka Ramadhan (a*), Mustika Nuramalia Handayani (a), Indah Khoerunnisa (a) a) Study Program of Agroindustry Technology Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi no 207, Bandung 40154, Indonesia *ramadhanoka[at]upi.edu Abstract Food waste is a challenge for sustainable development since it can increase greenhouse gas emissions and other environmental issues. Food processing and manufacturing are known to rise food waste. Meanwhile, plastic waste is a big problem in environmental pollution. This study aims to explore the potential of food waste as bioplastic material as an environmentally friendly alternative packaging. The method used was effective literature review. The results showed that many food wastes have potential to be developed as bioplastics as long as they contain biopolymers such as starch, cellulose or other biopolymers. Food waste comes from food processing industry such as sludge waste, cassava peel, banana peel, pineapple peel, durian seed, jackfruit seed, avocado seed, rice husk, cocoa pod husk, coconut husk, fish scale, shrimp sell, chicken feather and vegetable waste. Development of bioplastics from food waste has a double benefit that can solve two problems, namely reducing plastic waste and food waste at the same time, thereby promoting environmental sustainability. Keywords: Food waste; Bioplastic; Alternative packaging; Biopolymers; Share Link | Plain Format | Corresponding Author (MUHAMMAD OKA RAMADHAN)

10	Chemical Engineering	ABS-91
Differences of the characteristics whole and fresh-cut rambutan fruit on cold temperature storage L. SURIATI1*, I M. S. UTAMA, B. A. HARJOSUWONO, I B.W. GUNAM Warmadewa university Abstract ABSTRACT Rambutan is one of the potential tropical fruits to be developed. Rambutan contains many functional compounds that are good for health. In addition to taste delicious rambutan easily damaged. Skin damage often lowers consumer interest, this causes fresh-cut rambutan products to be more popular than whole fruit. Storage temperature is one of the factors that can maintain the quality and shelf life of rambutan. This study was conducted using the complete random design 2 replay factorial. Factor I: storage time of Rambutan (0, L, 2, 3, 4, 5, 6). Factor II: The storage temperature of Rambutan fruit 7-12C and-4-0C. Observations conducted objectively include: moisture content, pH, TSS, Vitamin C. The characteristics of intact rambutan fruit still remain good until the 6th day, while the fresh-cut only until 3th. Storage temperature for intact and fresh-cut rambutan are recommended to be stored at 7-12C. Keywords: 1;rambutan 2;intact 3;fresh-cut 4; temperature 5; characteristic Share Link | Plain Format | Corresponding Author (Luh Suriati)

11	Chemical Engineering	ABS-863
Process Simulation of Glycerol Conversion to Formic Acid D. A. Trirahayu (a*) a) Chemical Engineering Department, Politeknik Negeri Bandung, Bandung, Indonesia 40012 *dhyna.analyes[at]polban.ac.id Abstract Biodiesel is widely produced as alternative fuel from different kind of vegetable oil. The production of biodiesel also produces large amount of side products, such as glycerol. Glycerol has many applications in cosmetic, pharmacy, and lubricant industries. Glycerol also can be converted to many kinds of chemical products, one of them is formic acid. The oxidation of glycerol with hydrogen peroxide will produced formic acid and water. The simulation process was designed using Aspen Hysys. The reactor feed consists of pure glycerol and hydrogen peroxide 30%. The mole ratio of glycerol : hydrogen peroxide was set to 1 : 12. The oxidation process was simulated using conversion reactor with conversion 99% at temperature 250C and 170 atm. The process was followed with formic acid purification via distillation and extractive distillation using SULFOLANE. The extractive distillation needed because the azeotrope characteristic of water 22.4% and formic acid 77.6%. The simulation indicates that 10 kg/h glycerol can be produced around 2.7 kg/h formic acid with purity 96%. Keywords: formic acid, glycerol, process simulation, oxidation Share Link | Plain Format | Corresponding Author (Dhyna Analyes Trirahayu)

12	Chemical Engineering	ABS-1132
Scientific Based Learning Assisted by Integration E-modules Biochemical in AlQuran Risnita; Fadlilah; Louisiana Muliawati UIN Sulthan Thaha Saifuddin Jambi Abstract The learning process will be done well if there were a good learning activity. Process of learning activities must involve all aspects such as students, teachers, and the environment. Learning activities were physical and mental activities. In the learning process, the both of the activities must be combined. Based on observation, student biology education learning proses lowed learning activity. The aim of this research is to increased students learning activity Biology Education Study Program Faculty of Tarbiyah UIN STS Jambi through E-modules Biochemical. Collaborative learning based on lesson study has been done in the Biology Education Studi Program Faculty of Tarbiyah UIN STS Jambi in biochemistry courses. Open Lesson done for 2 cycles. The stages of the study lesson were plan (goal-setting and planning), do (research Design), see (lesson Discussion) and redesign (consolidation of Learning). Each cycle using a scientific approach in implementation with the approaches in the e-module. At the beginning of the lecture, student done the pre-test and the end of the lecture they done post-test. The results of this study indicated that an increased student learning activities in the process of lecturing biochemical. Keywords: Lesson study; E-module integrated AlQur’an; Student learning activities Share Link | Plain Format | Corresponding Author (Yusria M)

13	Chemical Engineering	ABS-622
Composite Polyvinyl Chloride Ultrafiltration Membrane for Peat Water Treatment E. Putri, N.A. Putri, D. Sidabutar, S. Sakinah, and P.T.P. Aryanti Chemical Eng. Dept., Universitas Jenderal Achmad Yani, Jl. Ters. Jend. Sudirman, Cimahi Abstract In this research, composite polyvinyl chloride ultrafiltration (PVC-UF) membrane was used for peat water treatment. The UF membrane was prepared by mixing polyvinyl chloride (PVC), polyethylene glycol (PEG400), ZnO, acetone, and DMAC. The concentration of PVC was varied from 10 to 14 wt.%, while the PEG400 was varied from 0 to 10 wt.%. The concentration of acetone and ZnO was fixed at four (4) wt.% and two (2) wt.%, respectively. Immersion precipitation method was used to form the membrane structure. The experimental results showed that higher humic substance rejection (>50%) was achieved when 12 wt.% PVC and 10% wt.% PEG was added into the polymer solution. The permeate flux of the membrane was above 100 L/m-2h-1 Keywords: peat water, ultrafiltration, humic substance, clean water Share Link | Plain Format | Corresponding Author (Putu Teta Prihartini Aryanti)

14	Chemical Engineering	ABS-886
Is pressing technique required in the application on aloe vera leaf pulp for skin moisture? Ambar Sulianti, Indira Bellanian, Nabila Hanna Sabrina UIN Sunan Gunung Djati Abstract Although aloe vera has been investigated to contain mucopolysaccharides that are beneficial for moisturizing the skin, the technique for its use is still not widely studied. This study aimed to analyze the effects of skin moisture from the use of aloe vera leaf pulp by patting and pressure rubbing techniques on facial skin. This is an experiment research on 50 women aged 18-20 years. Moisture observation techniques was carried out using photo analysis from microscope on the skin with 600x magnification. The results showed that patting technique was better in improving roughness and shine of skin (p <0.05). As for the repair of cracks and skin scrapes both tapped and rubbed together gave same good results. Pressing technique on the skin is not needed to moisturize the skin using aloe vera. Keywords: Pressing technique, application, aloe Vera, skin, moisture Share Link | Plain Format | Corresponding Author (Ambar Sulianti)

15	Chemical Engineering	ABS-633
The Use of SIMCA Method and NIR Spectroscopy with Two Different Hand Held and Portable Spectrometers Equipped with Integrating Sphere for Classification of Three Different Indonesian Specialty Coffees Diding Suhandy (a*), Meinilwita Yulia (b), Shinichiro Kuroki (c), Kohei Nakano (d) a)Spectroscopy Research Group (SRG), Laboratory of Bioprocess and Postharvest Engineering, Department of Agricultural Engineering, Faculty of Agriculture, The University of Lampung, Jl. Prof. Dr. Soemantri Brojonegoro No.1, Bandar Lampung, 35145, IndonesiaThe University of Lampung *diding.sughandy[at]fp.unila.ac.id b) Department of Agricultural Technology, Lampung State Polytechnic, Jl. Soekarno Hatta No. 10, Rajabasa Bandar Lampung, 35141, Indonesia c) Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan d) The United Graduate School of Agricultural Science, Gifu University, Gifu Prefecture 501-1193, Japan Abstract The objective of this study is to evaluate the use of SIMCA method and NIR spectroscopy with two different hand held and portable spectrometers equipped with integrating sphere for classification of three different Indonesian specialty coffees. Three specialty coffees from three different origins were used: Gayo coffee from Aceh 10 samples, Kintamani from Bali 10 samples and Wamena from Papua 10 samples. All samples were roasted at same condition (medium roasting at temperature of 200°C for 10 minutes). Samples were grinded using a home coffee grinder and sieved using 50 mesh to obtain homogenous particle size of 297 micrometer. Spectral data in the visible and near infrared range was measured in a diffuse reflectance mode using two hand held and portable spectrometers equipped with an integrating sphere (ISP-REF, Ocean Optics, USA). The integrating sphere is coated with Spectralon® and installed a built-in tungsten-halogen light source. The supervised classification method based on SIMCA method was applied for original and preprocessed spectral data. The result demonstrated that the classification was satisfied with 100% of accuracy, sensitivity and specificity. Keywords: SIMCA, NIR spectroscopy, Specialty coffee, Portable spectrometer, Integrating sphere Share Link | Plain Format | Corresponding Author (Diding Suhandy)

16	Chemical Engineering	ABS-906
Green Environment Technology: Bulk Cooking Oil Purification with Activated Charcoal Bagasse under Different Activators Sri Rahayu (a*), Rizka Amalia (a), Novita Rahma Mujayani (a), Novita Sari (a), Intan Salsabila Putri (a), Samuel Yesaya Wirjopranoto (a) (a) Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Indonesia *srirahayu[at]unj.ac.id Abstract Organic wastes are used in order to reduce environment pollution by changing it into activated charcoal that could regenerates waste cooking oil. The aim of this research was to analyzed the effect of various activator to measure the oil quality. The parameters are turbidity, free fatty acids, peroxide numbers and organoleptic from this waste cooking oil. CRD (Complete Randomized Design) was applied with 3x3 factors. Bagasse charcoal was activated using KMnO4 10%, NaCl 10% and Ca(OH)2 10%. The data was analyzed statistically using ANOVA 1-way. The results showed that bagasse charcoal activated with KMnO4 can affect the turbidity, smell and color from cooking oil better than the other activators (sig <0.05). To conclude, different activators gave different results on waste cooking oil purification. Keywords: Environment, Waste, Charcoal, Oil Share Link | Plain Format | Corresponding Author (Rizka Amalia)

17	Chemical Engineering	ABS-651
The Application of UV-visible Spectroscopy and PLS-DA Method to Classify Indonesian Multifloral Honeys from Different Origins Diding Suhandy (a)*, Meinilwita Yulia (b) a)Spectroscopy Research Group (SRG), Laboratory of Bioprocess and Postharvest Engineering, Department of Agricultural Engineering, Faculty of Agriculture, The University of Lampung, Jl. Prof. Dr. Soemantri Brojonegoro No.1, Bandar Lampung, 35145, Indonesia. *diding.sughandy[at]fp.unila.ac.id b)Department of Agricultural Technology, Lampung State Polytechnic, Jl. Soekarno Hatta No. 10, Rajabasa Bandar Lampung, 35141, Indonesia. Abstract The objective of this current research is to investigate the application of UV-visible spectroscopy and PLS-DA method to classify Indonesian multifloral honeys from different origins. Two multifloral honeys were used: multifloral honey from South Sumatera (MFS) and multifloral honey from Jambi (MFJ). Each origin consists of 100 samples of multifloral honey. UV-visible spectral data in the range of 190-1100 nm was acquired in transmittance mode using UV-Vis spectrometer. Spectral preprocessing methods were applied and principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA) was calculated on preprocessed spectral data. The multifloral honey samples can be clustered into its origin properly. The best calibration model for origin determination was achieved using preprocessed spectra with high coefficient of determination (R2) and low standard error of calibration (SEC). This promising result is important step to establish an authentication of multifloral honey from Indonesia. Keywords: UV-visible spectroscopy, multifloral honey, PCA, PLS-DA, Origin Share Link | Plain Format | Corresponding Author (Diding Suhandy)

18	Chemical Engineering	ABS-655
Simple Analytical Method Based on UV-Visible Spectroscopy Coupled with SIMCA for Authentication of Lampung Robusta Coffee with Geographic Indication (GIs) Meinilwita Yulia (a)*, Diding Suhandy (b), Sapto Kuncoro (b) a)Department of Agricultural Technology, Lampung State Polytechnic, Jl. Soekarno Hatta No. 10, Rajabasa Bandar Lampung, 35141, Indonesia. *meinilwitayulia[at]polinela.ac.id b)Spectroscopy Research Group (SRG), Laboratory of Bioprocess and Postharvest Engineering, Department of Agricultural Engineering, Faculty of Agriculture, The University of Lampung, Jl. Prof. Dr. Soemantri Brojonegoro No.1, Bandar Lampung, 35145, Indonesia. Abstract Lampung Robusta coffee got a geographic indication (GIs) protection from Indonesian government since 2014 with certificate number of ID G000000026. This GIs coffee come from three different geographic origins: West Lampung, Tanggamus and Way Kanan. In this research, we evaluate the possible application of simple analytical method based on UV-visible spectroscopy coupled with SIMCA for authentication of Lampung Robusta coffee with GIs. Two types of Lampung Robusta coffee were used: GIs coffee from West Lampung and Tanggamus and non-GIs coffee from Pesawaran. Each type consists of 60 samples of ground roasted coffee with 1 g weight. The all samples were extracted using a hot distilled water and 3 mL aqueous samples were pipetted into 10 mm quartz cuvette. UV-visible spectral data were recorded in the range of 190-1100 nm. The PCA result showed that GIs coffee and non-GIs coffee can be well separated. The SIMCA classification was accepted with 100% of accuracy, sensitivity and specificity. Keywords: SIMCA, UV-visible spectroscopy, Lampung Robusta coffee, Authentication, Geographic Indication (GIs) Share Link | Plain Format | Corresponding Author (Meinilwita Yulia)

19	Chemical Engineering	ABS-927
Performance of K2O/Nb2O5 as a heterogeneous catalyst for biofuel production Firda Tirta Yani (a), Husni Husin(a,b*), Darmadi(a,b), Syaifullah Muhammad(a,b), Meisy Adrinda(b), Mawaddah Thifal(b) (a)Doctoral Program, School of Engineering , Universitas Syiah Kuala, Banda Aceh, Indonesia 23111 (b) Reaction Engineering and Catalysis Laboratory, Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia 23111 *husni_husin[at]che.unsyiah.ac.id Abstract The objective of this study was to investigate K2O/Nb2O5 as a new potential heterogeneous catalyst for biofuel production. The catalyst was prepared through an impregnation method using K2CO3 and Nb2O5. The K2O/Nb2O5 was analyzed by scanning electron microscopy (SEM), Energy dispersive X-ray (EDX) and X-ray diffractometer (XRD). XRD data indicated the presence of potassium on the diffractogram. The catalyst was tested for biodiesel production from palm oil. The catalyst loaded was varied of 2.0 -12.0wt.%. The highest yield of biodiesel was the reach of 96,78% at K2O loading of 50% on Nb2O3 and the catalyst loaded of 4 wt.% to oil. In the increasing of potassium loading on Nb2O3 shows increasing the activity of the catalysts. Potassium, as an active site, plays a vital role in the reaction of vegetable oil and methanol to produce biodiesel. Niobium was able to interact well with potassium, and it enhanced the crystallinity and stability of the catalyst. The characteristics of biodiesel, such as density, viscosity, acid number, and flash point, were evaluated to confirm the purpose of catalyst function. The biodiesel characterization showed in the range with SNI standard. Keywords: Niobium, potassium, heterogeneous catalyst, biofuel, transesterification Share Link | Plain Format | Corresponding Author (Husni Husin)

20	Chemical Engineering	ABS-934
Fast Pyrolysis of Corn Husk For Bio-Oil Production Leni Maulinda(a), Husni Husin(a,b*), Nasrul AR(a,b), Cut Meurah Rosnelly(a,b), Erna Andau(b), Winda Lestari(b) (a)Doctoral Program, School of Engineering , Universitas Syiah Kuala, Banda Aceh, Indonesia 23111 (b) Reaction Engineering and Catalysis Laboratory, Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia 23111 *husni_husin[at]che.unsyiah.ac.id Abstract The fast pyrolysis of corn husk was studied by using a tube pyrolysis unit. This research aimed to produce bio-oil from corn husk through a fast pyrolysis process. Pyrolysis is a thermochemical decomposition process of biomass at high temperatures with the absence of oxygen. The products in pyrolysis combustion are solids (bio-char), liquids (bio-oil), and gases. The major factors to get excellent products of pyrolysis are temperature and time. The corn husk was dried at 105 oC in the oven to reduce water content. The dried sample was burned at temperatures of 250, 300,350, 400, 450, and 500 oC by flushing the nitrogen gas inside the tube for two h. The highest yield of bio-oil was reached of 33.3% at a temperature of 400 degree C. Bio-oil characteristics such as density (1,00 gr/ml) and viscosity (8.3 cP) were observed. The composition of bio-oil was identified using Gas Chromatography-Mass Spectrometry. Its composition was composed of hydrocarbons such as acids, furfural, phenols, and ketones. Keywords: Bio-oil, fast pyrolysis, corn husk, bio oil properties Share Link | Plain Format | Corresponding Author (Husni Husin)

21	Chemical Engineering	ABS-424
The integration of STEAM-project-based learning to train students critical thinking skills in science learning through electrical bell project Adriyawati, Yuli Rahmawati, Erry Utomo, Alin Mardiah Postgraduate Basic Education, Universitas Negeri Jakarta Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta Timur 13220, Indonesia Abstract Abstract. The research portrays the integration of STEAM-project-based learning with the aim to train critical thinking skills of the thirty-six grade 5 student in science learning. The application of STEAM is carried out by integrating it with project-based learning model on energy transformation topic through electrical bell project. The qualitative method was employed to explore the development of critical thinking skills through interviews, observations, reflective journals, and critical thinking skills test. The collected data was analysed through the critical thinking criterias of identify the question at issue, conceptual understanding, ideas connection, assumptions, and inferences [11]. The implementation of STEAM-PjBL was adapted from [12]. The study found that STEAM-PjBL trained students to ask questions and have a good understanding of the changing energy from electrical energy into sound energy. Moreover, through problem solving and project making, students are encouraged to connect ideas, making assumptions, and inferring concepts. The challenges faced in this study are time management, project idea related to the concept teaching, and students involvement. In addition, the integration of STEAM-PjBL provides an opportunity for teachers to develop their competencies on applying various method to encourage students in learning. Keywords: Critical Thinking, Electrical Bell, STEAM Based-Learning Project Share Link | Plain Format | Corresponding Author (Adriyawati Adriyawati)

22	Chemical Engineering	ABS-169
The Development of Chemical Representations Oriented Virtual Laboratory For Electrolysis Practices Siti Nur Hamidah, Sari Sari and Ida Farida Pendidikan Kimia Universitas Islam Negeri Sunan Gunung Djati Bandung Abstract Abstract. This study aimed to describe the development of chemical formula oriented virtual laboratory. It produced a learning media application which could be used in electrolysis practices. The study described the design phase, the development phase, the testing phase and the completion phase of the product. It also analyzed the results of limited tests towards the product. The study showed that the product, a virtual laboratory, features colorful, attractive design and interactivity. The virtual laboratory can be potentially used as a learning media in chemistry learning on electrolysis concepts. Keywords: virtual laboratory, chemical formula, electrolysis practices Share Link | Plain Format | Corresponding Author (Sari Sari)

23	Chemical Engineering	ABS-683
Separation of Lanthanides from Belitung Silica Sand Using Roasting and Sulfuric Acid Leaching Wuwuh Wijang Prihandini (a*), Eny Kusrini (a), Karina Ayuningtyas(a) a) Department of Chemical Engineering, Universitas Indonesia, Depok 16424, Indonesia *wuwuh.wijang[at]ui.ac.id Abstract Silica sand or quartz sand is the type of sand that comes from igneous rock in the form of sediment along with other mineral products that have weathered due to air and water activity. These silica sands are generally used as raw materials in the glass industry and the building materials. One of the silica sand producing areas is Belitung Island, which has a broad availability and potentially become the source of raw material for lanthanide compounds. Lanthanides are compounds that have high economic value because of their use in various industrial sectors. However, these compounds are associated-minerals which its content in the main minerals is relatively small. The process of separating lanthanides by solid-liquid extraction method (leaching) using acid has been widely studied but has not produced an optimal technology yet, so the additional steps is needed to separate the lanthanides. In this research, the lanthanide separation process consists of silica sand roasting and solid-liquid extraction (leaching) using sulfuric acid, with variations in the temperature of the roasting process (300 oC and 500 oC and 700 oC), and variations in the concentration of sulfuric acid solution Keywords: Lanthanide, Leaching, Silica sand, Roasting Share Link | Plain Format | Corresponding Author (Wuwuh Wijang Prihandini)

24	Chemical Engineering	ABS-691
Preliminary study on antimicrobial activity of liquid smoke from cacao pod shells (Theobroma cacao L) Hera Desvita(a), M Faisal (*b), Mahidin (b) and Suhendrayatna (b) a)Doctoral Program, School of Engineering, Universitas Syiah Kuala b)Chemical Engineering Department,Faculty of Engineering, Universitas Syiah Kuala Jalan Tengku Syech Abdur Rauf No. 7, Darussalam, Banda Aceh 23111, Indonesia *mfaisal[at]unsyiah.ac.id Abstract Cacao pod shells (Theobroma cacao L) is one of the biomass wastes that can be made as raw materials for liquid smoke because this biomass contains lignin, cellulose, and hemicellulose. This research studied the antimicrobial activity of liquid smoke from cacao pod shells on several common food-borne pathogens such as salmonella choleraesuis, Escherichia Coli, Staphylococcus aureus, Bacillus subtilis. The liquid smoke used was obtained from Cacao pod shells which were pyrolyzed at a temperature of 300 °C (T1), 340 °C (T2), and 380 °C (T3). Liquid smoke concentration was varied from 1-5%. The antimicrobial activity test was conducted by using the Kirby Bauer method. The results showed that liquid smoke produced from T1 and T2 (and at a liquid smoke concentration of 4% and 5% ) could inhibit the growth of all the tested bacteria. At T3 and 1%-5% of liquid smoke, only E.Coli could be inhibited (inhibition zone= 6-7.05 mm), while the growth of Salmonella choleraesuis and S.Aureus were inhibited at 3-5% liquid smoke with inhibition zone ranging from 6 -7.2 mm. However, B. Subtilis can be inhibited by 2-5% liquid smoke concentration. All the tested bacteria have shown the sensitivity to liquid smoke, but E.Coli was the stronger resistant compared to others. The results of this study show the possibility of the use of liquid smoke from Cacao pod shells as a preservative agent to inhibit microorganisms in food. Keywords: Liquid smoke; pyrolysis; cacao pod shells; antibacterial activity Share Link | Plain Format | Corresponding Author (Muhammad Faisal)

25	Chemical Engineering	ABS-181
The Use of Non-Ionic Surfactants with Different Hydrophilic-Lipophilic Balance (HLB) and Their Effect on Flow Properties in Palm Oil Biodiesel Anya Prilla Azaria (a), Sylvia Ayu Bethari (b), Mohammad Nasikin (a*) a) Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia a)anya.prilla81[at]ui.ac.id a*) mnasikin[at]che.ui.ac.id b) PPPTMGB” LEMIGAS”, Jl. Ciledug Raya Kav.109, Cipulir, Kebayoran Lama, South Jakarta 12230, Indonesia b)sylvia.bethari[at]esdm.go.id Abstract The use of surfactants has been known to reduce the interfacial tension between 2 fluids. Surfactants have Hydrophilic-Lipophilic Balance (HLB) values that vary depending on their function. Previously, the addition of surfactant Sorbitan Monooleate surfactant had succeeded in reducing Cloud Point by 4.2C and CFPP by 2C. In this study, two different types of nonionic surfactants were tried, namely Sorbitan Monolaurate and Sorbitan Trioleate which have HLB values of 8.6 and 1.8, respectively. These surfactants are expected to improve the flow properties of biodiesel by reducing the interfacial tension between monoglycerides and biodiesel. Each surfactant was varied in palm oil biodiesel with a content of 1% and 2% at room temperature (±27C) for a month with every week observation. It was tested using the flow properties parameters, which are Cloud Point, Pour Point, and CFPP. The addition of 1% Sorbitan Monolaurate to biodiesel caused a rise in Cloud Points, Pour Points, and CFPPs by 3.2C, 3.5C, and 6C, respectively. The addition of 2% Sorbitan Trioleate to biodiesel caused a decrease in Cloud Points and Pour Points respectively by 0.5C and 1C, but CFPP tended to be constant. Changes in functional groups between monoglyceride mixtures and surfactants were tested using FTIR. Keywords: Biodiesel;Sorbitan Monoolaurate;Sorbitan Trioleate;Flow properties Share Link | Plain Format | Corresponding Author (Anya Prilla Azaria)

26	Chemical Engineering	ABS-949
Biodiesel Production From Palm Oil Using Banana Weevil Ash As a Solid Catalyst Meriatna(a), Husni Husin(a,b*), Medyan Riza(a,b), M. Faisal(a,b), Khairunnisa(b), Richa Syafitri(b) (a)Doctoral Program, School of Engineering , Universitas Syiah Kuala, Banda Aceh, Indonesia 23111 (b) Reaction Engineering and Catalysis Laboratory, Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia 23111 *husni_husin[at]che.unsyiah.ac.id Abstract In this present study, we investigated the use of banana weevil ash as solid catalysts for biodiesel production. The ash catalyst was prepared through a simple burn of banana weevil in an open room. The powder was crushed by mortar and calcined at 600 degree C for 5 h. The crystallinity and the morphologies of the powder were analyzed by XRD, SEM, and EDX. The biodiesel production was carried out in a batch reactor for 90 minutes using stirrer at 65 degree C. The molar ratio of methanol to oil was varied of 6:1, 8:1, 10:1, 12:1, and 14:1 with catalyst loading of 4.0 wt.%. The results showed that the highest yield was reached 96% at methanol to oil ratios of 12:1. The density and viscosity of biodiesel were reported of 0.84 gr/ml and 3.04 cSt, respectively. The properties of biodiesel showed conformity in the range of SNI standard. Based on these results, banana weevil ash can be a promising heterogeneous catalyst for biodiesel production. Keywords: Solid catalyst, banana weevil, ash, biodiesel Share Link | Plain Format | Corresponding Author (Husni Husin)

27	Chemical Engineering	ABS-968
Biodiesel Production over Potassium Activated Carbon Supported Solid-Based Catalyst Fahrizal Nasution(a), Husni Husin(a,b*), Mahidin(a,b), Nurhazanah(b), Komala Pontas(1), Muhammad Rezeki Koto(b), Khairul Ikhsan(b) (a)Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia 23111 (b) Reaction Engineering and Catalysis Laboratory, Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia 23111 (c) Ministry of Industry of Republic of Indonesia, Indonesia *husni_husin[at]che.unsyiah.ac.id Abstract Catalytic biodiesel production from vegetable oil and methanol using K2O/C has been studied. The carbon-based from rice husk were fabricated via the pyrolysis route. The catalysts were formed by depositing K2CO3 on the carbon surface. The percentages of active K2CO3 (10%; 20%; 30%; 40%; 50%) for comparative purposes. To better understand the impregnation effects, particle size, surface topography, and atom composition, the catalysts were analyzed by Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray (EDX) and X-Ray Diffractometer (XRD). Biodiesel was produced via the transesterification . The reaction was carried out during 90 minutes at 65 degree C using 4wt% of the catalyst and methanol to oil molar ratio 10:1. The highest yield of biodiesel was reached of 95,42% at a K2O loading of 50% on carbon-based rice husk. The use of carbon-based (K2O/C) as catalysts enhance the purity of the product (carbon-based effect). The characterization of biodiesel, such as viscosity, density, flash point, and acid number, was evaluated to confirm the purpose of catalyst function. The biodiesel characterization showed in the range with SNI standard. Keywords: solid catalyst, carbon, rice husk, biodiesel Share Link | Plain Format | Corresponding Author (Husni Husin)

28	Chemical Engineering	ABS-738
Development of Fragrance Carrier from Luffa acutangula Using Zeolite A Karina Ayuningtyas (a*); Eny Kusrini (a); Wuwuh Wijang Prihandini (a) a) Department of Chemical Engineering, Faculty of Engineering, University of Indonesia *karinaayuningtyas11[at]gmail.com Abstract In order to study the effect of zeolite A (ZA) addition to adsorption efficiency of green tea oil (GTO) by Luffa fibre, an experiment has been carried out to prepare matrix zeolite A embedded in Luffa fiber composite (L-ZA) used as a fragrance carrier. LZA which retained the rate of release of GOT can be used as air freshener. This paper presents surface properties of ZA and influence of these properties on the ability to adsorb several fragrance compounds: cyclododecanol, heptanal,2-(phenylmethylene), isocitronellol, tonalid, and diethyl phthalate. The mass of ZA were varied 1; 2; 3 g and named as L-ZA1, L-ZA2 and L-ZA3 respectively. L-ZA composite was synthesized by mixing method using ZA and 1 g sodium alginate (SA). The function of SA is as a matrix binder, which it can also adsorb the GOT. The adsorption efficiency of perfume in L-ZA composite was observed by gravimetric analysis. Luffa, ZA and SA each have adsorption efficiency of 292.64%, 94.54% and 90.13%, respectively. Furthermore, the adsroption capacity were measured by gravimetric method, the structure of matrices were analyzed by SEM, and the bioactive compound of GTO were analyzed by FTIR and GC-MS. Keywords: Zeolite A; Loofah; Green Tea Oil; Fragrance Carrier Matrix; Adsorption Efficiency Share Link | Plain Format | Corresponding Author (Karina Ayuningtyas)

29	Chemical Engineering	ABS-231
Integrating Green Processing Experiments in Food Technology Courses Mustika Nuramalia Handayani*, Indah Khoerunnisa, Muhammad Oka Ramadhan b) Study Program of Agroindustry Technology Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi no 207, Bandung 40154, Indonesia Abstract Promoting environmental sustainability is an imperative issue to achieve sustainable development goals. However, students of food technology courses have not yet conceived the practical application of sustainability, whereas some activities in food industry have a negative impact on the environment. This study aims to introduce green processing experiments in food technology courses as a laboratory-based pedagogy and to evaluate its effectiveness in delivering the concept of sustainable food processing. Test was used to evaluate the effectiveness. Structured interviews were conducted to gather students feedback on the course content. Experiences at Universitas Pendidikan Indonesia showed that green processing experiments in a food technology course have increased students understanding of sustainable food processing. Moreover students were interested in the course content and recommend to be implemented in other courses in the future. Keywords: green processing; food technology Share Link | Plain Format | Corresponding Author (Mustika Nuramalia Handayani)

30	Chemistry	ABS-256
Tyrosinase Inhibitory Activity of Garcinia daedalanthera Pierre Neneng Siti Silfi Ambarwati(a), Berna Elya(b)*, Yesi Desmiaty(c), Islamudin Ahmad(d) a) Department of Cosmetology, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Pulogadung, Jakarta Timur, DKI Jakarta, 13200, Indonesia b) Department of Pharmacognosy-Phytochemistry, Faculty of Pharmacy, Universitas Indonesia, Depok, 16424 West Java, Indonesia c) Department of Phytochemistry, Faculty of Pharmacy, Universitas Pancasila, Jakarta, 12640, Indonesia. d) Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Mulawarman, Samarinda, East Kalimantan, Indonesia. Abstract Background. The tyrosinase enzyme catalyzes the first stage in two reactions in the synthesis of melanin (the hydroxylation of l-tyrosinase becomes 3,4-dihydroxyphenylalanine (l- DOPA) and oxidation from L-dopa to dopaquinone). Hyperpigmentation in human skin is a general phenomenon that is not desirable. Researchers were encouraged to identify potential new tyrosinase inhibitors for cosmetics, especially anti-hyperpigmentation. Purpose. This study purposed to determine the inhibitory activity of the tyrosinase enzyme from Garcinia daedalanthera Pierre leaves. Methods. The extract was obtained by maceration successively method. The anti-tyrosinase assay using the spectrophotometric method at 490 nm. The enzyme used tyrosinase from mushrooms lyophilized powder (Sigma), and the substrate used 3,4-dihydroxy-L-phenylalanine, L-DOPA (Sigma). Results. The tyrosinase inhibitory assay results of 100 ppm (triplicate) showed the leaves extract, including ethyl acetate extract of 33.42 ± 5.98 %, hexane extract was 50.67 ± 0.47 %, and methanol extract of 50.68 ± 1.87 %, respectively. Moreover, the stem bark has activity as follows methanol extract of 43.76 ± 1.41 % and the ethyl acetate extract of 55.71 ± 2.80 %. Percentage inhibition of the positive control (kojic acid) was 65.07 ± 0.03 % at 100 ppm. Keywords: antityrosinase, Garcinia daedalanthera Pierre, leaves, stem bark, successively maceration Share Link | Plain Format | Corresponding Author (Neneng Siti Silfi Ambarwati)

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