Page 4 (data 91 to 120 of 207) | Displayed ini 30 data/page
<< PREV 1 2 3 4 5 6 7 NEXT >>

91	Food Chemistry	ABS-124
REFINING AND ANALYSIS OF COOKING OIL (WASTE COOKING OIL) USING RICE WITH THE BATCH METHOD Ana Lailatul Farida1, Sayyidah Afifa1, Mazaya Aurora R.S1., Brikita Eusebes S. T1., Salsa Safitri Putri E1., Nila Tanyela Berghuis1 Universitas Pertamina Abstract The regular use of waste cooking oil, which has a high level of free fatty acids as well as carbonyl and peroxide compounds, is the background of this study, which is harmful to one^s health. If it is used indefinitely, it will have harmful effects on health, including cancer, heart disease, and possibly death. We, therefore, performed research on the purification and analysis of waste cooking oil using white rice and aking rice with the batch method, to detect the free fatty acid levels before and after purification, and to establish the effectiveness of white rice and aking rice. determine the utilized cooking oil^s quality following filtration using adsorbent. The findings demonstrated that white rice is more effective than aking rice at reducing fatty acid levels, as shown by the acquisition of FFA levels using white rice of 0.3141% in the merchant oil sample and 0.2410% in the home oil sample, while purification with the aking rice adsorbent is 0.3474% in the merchant oil sample and 0.1374% in the home oil sample. Keywords: waste cooking oil, aking rice, FFA. Share Link | Plain Format | Corresponding Author (Nila Tanyela Berghuis)

92	Food Chemistry	ABS-131
Aloe vera Gel and Moringa Leaf Extract as Coating Materials in Controlling the Quality of Guava Fruit During Storage Refilda (a*), Putra Ramadhan Winardi (a), Yefrida (a) a) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Andalas University, Padang, Indonesia. *refilda[at]sci.unand.ac.id Abstract Postharvest technology commonly used to control pathogen attack is coating with synthetic chemicals, but this has an unfriendly impact on the environment and consumers. Coating with aloe vera gel and plant extracts is a natural way to extend shelf life and maintain postharvest quality. But The use of Moringa leaf extract and aloe vera as a coating material on guava fruit has not been reported yet. This research was aimed to find out the composition of guava fruit coating with aloe vera gel and Moringa leaf extract which gave optimal quality physicochemical properties during storage. The parameters tested were weight loss, fruit spoilage, fruit moisture content, total dissolved solids, total titrated acid, total phenolic, and total antioxidants from guava fruit. The coating composition that gives the best guava fruit quality with a storage time of 15 days is aloe vera gel 90%, Moringa leaf extract 5%, Carboxy Methyl Cellulose (CMC) 0.025%, and glycerol 0.5%. Guava fruit coated with this composition had a weight loss of 9.42%, water content 57.86%, spoilage 4.44%, total dissolved solids 8.00 oBrix, total titrated acid 1.97%, total antioxidants 2, 19 mg AA/FW, and total phenolic 1.50 mg GAE/FW. This value is better than uncoated Guava fruit. Keywords: Guava- Edible coating- Physicochemical Share Link | Plain Format | Corresponding Author (Refilda Refilda)

93	Food Chemistry	ABS-132
UTILIZATION OF JAPANESE SEEDS AND SOYBEAN SEEDS AS RAW MATERIALS FOR MAKING FLOUR Ujang ahmad soleh1, Zulfikar fauzan ali1, Tuti purnama elia1, Yeni novita sari1, Meidiana budiawati1, Rika febriyanti hermana1, Miftah khoirunnisa1, Syifa fadlillah1, Dr. Nila Tanyela B1 Universitas Pertamina Abstract Indonesia is a tropical country that is overgrown by a variety of plants, one of which is jackfruit. Jackfruit plant which is also known as Artocarpus heterophyllus Lamk has been widely used in the food industry, this aims to meet food needs by utilizing agricultural products that have not been processed but can provide added value in the agricultural product processing chain. Processing of jackfruit produces waste of as much as 65-80% of the total jackfruit. The waste produced in the form of jackfruit seeds occupies a fairly large position, namely 30-50% of the total waste generated. One of the efforts that need to be done is by utilizing jackfruit seed waste into jackfruit seed flour as an effort to increase the economic value of jackfruit seeds. In general, people do not know how to process some foodstuffs from agricultural waste, which can still be used optimally. One of the grains that can be used as flour is soybean seeds, the high protein content in soybeans makes soybeans widely used as an additional ingredient in the food. Soybean seeds are usually used as semi-finished products, namely soybean flour. Soybean flour is a semi-finished food ingredient that can be used as a composite flour and as an ingredient that can enrich nutrients in foods in the form of high protein. Therefore, to meet the nutritional needs of Indonesia, it is necessary to combine jackfruit seed flour with soybean seed flour which is one of the main ideas of this research. Testing the Flour Content of Jackfruit Seeds and Soybeans based on SNI 3751:2009. Based on the test, jackfruit and soybean seed flour has a moisture content of 9.19%- ash content of 3.05%- fat content of 8%- carbohydrate content of 59.94%- protein content of 19.82%- Fe content of 87.6 mg/kg- and total sugar content of 31.61%. Keywords: Artocarpus heterophyllus Lamk, Jackfruit seeds, soybean seeds, Jackfruit seed flour, soybean seed flour, Share Link | Plain Format | Corresponding Author (Nila Tanyela Berghuis)

94	Food Chemistry	ABS-135
Effect of Germination and Elicitation using Tempeh Fungus on The Phenolic Profile of Jack Bean (Canavalia ensiformis L.) Siti Aisyah1*, Amelinda Pratiwi1, Rita Chintia Dewi1, F.M Titin Supriyanti1 1Department of Chemistry, Universitas Pendidikan Indonesia Abstract Phytoalexin is an antimicrobe compound synthesized in the plant as a result of pathogen response and chemical interaction. Elicitation is one of the induction methods to form a phytoalexin compound. The aim of this research is to observe the effect of the combination of germination and elicitation using tempeh fungus on the isoflavonoid profile of jack bean. The jack bean was germinated for two to seven days following five days of elicitation using tempeh fungus. The dried powder of jack bean was extracted using methanol 80% (v/v). The isoflavonoid profiles were analyzed using LC-MS/MS. The results show that germination and combination germination-elicitation can change the isoflavonoid profile. It showed that 2^-hydroxygenistein and medicarpin can be elicited in jack bean by using tempeh fungus. Keywords: Germination, Elicitation, Isoflavonoids, Phytoalexin, LC-MS/MS Share Link | Plain Format | Corresponding Author (Siti Aisyah)

95	Food Chemistry	ABS-138
Rapid Secondary Metabolites Profiling of Underutilized Legumes Using Fourier Transformation Infrared (FT-IR) Based Metabolomics Amelinda Pratiwi*1, Siti Aisyah1 Department of Chemistry, Universitas Pendidikan Indonesia Abstract Indonesia has several legumes species of which some of them has not widely explored, including cowpea (Vigna unguiculata), red bean (Phaselus vulgaris), and rice bean (Vigna umbellata). This study aims to differentiate the metabolite profiles. The metabolite profiling analysis of three types of legumes was carried out using FTIR-based metabolomics. The legumes powder was immediately dissolved in KBr and analyzed using FTIR spectroscopy. The analysis data multivariate of FTIR spectrum was then carried out by UnscramblerX. The metabolite profiles of the three legumes could be distinguished through PCA analysis. Based on the loading plot analysis, there were 4 ranges of wave numbers contributed to the different profiles of each bean, namely in the fingerprint area to 2000, 2200 - 2500, 2700 - 3200, and 3500 - 4000 cm-1. The different absorption for each type of bean was suggested to be the absorption of the -C-H band from carbohydrates and proteins, or amides for rice bean and structural carbohydrates for cowpea. The results of the hierarchical complete linkage (HCA) analysis of the FTIR spectrum of cowpea, rice bean, and red bean showed that red bean had the most distant relationship compared to the other two beans, while rice bean and cowpea had close similarities. Keywords: FTIR, metabolomics, underutilized legumes, PCA, HCA Share Link | Plain Format | Corresponding Author (Amelinda Pratiwi)

96	Food Chemistry	ABS-156
Effect of Carbonate on Cultivation of Microalgae Spirulina platensis on Growth Rate, Protein Content, and Phycobiliprotein Pigments. Kumara Dimas Setiawan(a) a) Faculty of Science and Computers, Department of Chemistry, Pertamina University, Jalan Teuku Nyak Arief, RT.7/RW.8, Simprug, Kebayoran Lama, South Jakarta DKI Jakarta, 12220 b) Pertamina Research, Technology, and Innovation, Jalan Raya Bekasi No.20, RT.1/RW.2 Terate, Cakung, East Jakarta, DKI Jakarta 13920 *kumaradimas1[at]gmail.com Abstract Spirulina platensis is a blue green microalga that produces protein as a food source which mainly contains blue pigment phycocyanin as natural food coloring. The use of Spirulina platensis in food industry is known increasing from year to year. This study aimed to analyze the effect of carbonate on the strain^s growth rate, protein content, and phycobiliprotein pigments in microalgae Spirulina platensis cultivated on BG-11 and Zarrouk^s media. The results of this study indicated that variations in the content of carbonate concentrations in BG-11 and Zarrouk^s media greatly affect the growth rate, protein content, and phycobiliprotein pigments. From the results, it was showed that the strain cultivation on control BG-11 media and Zarrouk^s modified NaHCO3 50% deficient has the highest growth rate compared to the other variations. This shows that the addition of NaHCO3 and nutrient content greatly affect the rate of cell growth. From the protein analysis, it was showed that the highest protein content was in Zarrouk^s medium modified NaHCO3 50% deficient at 1.92 mg ml-1. The results of the analysis of the highest phycobiliprotein pigment in BG-11 NaHCO3 media 2.5 g L-1 with phycocyanin levels of 0.73 mg ml-1, allophycocyanin levels of 0.83 mg ml-1 and phycoerythrin of 0.31 mg ml-1. With the presence of nitrogen concentration in the media, it can increase the production of protein and phycobiliprotein pigments from Spirulina platensis. Keywords: Spirulina platensis, NaHCO3, protein content, phycobiliprotein pigment, BG-11, Zarrouk^s, phycocyanin, allophycocyanin, phycoerythrin Share Link | Plain Format | Corresponding Author (Kumara Dimas Setiawan)

97	Food Chemistry	ABS-170
UTILIZATION OF FLOUR OF HIGH CALCIUM FLOUR (RASTRELLIGER KANAGURTA) AS RAW MATERIAL Ida Fitri Maharani 1, Cantika Samrestu R 1, Rahmad Gunawan 1, Sri Wahyuni Siregar. 1, Sherina Saskia 1, Alfiyah Qaulan K 1, , Dr. Nila Tanyela B1. a) Department of Chemistry, Faculty Of Science and Computer, Universitas Pertamina Jl. Teuku Nyak Arief Kebayoran Lama, Jakarta Selatan, 12220, Indonesia * nila.tanyela[at]universitaspertamina.ac.id Abstract Fish bones are one of the by-products of processing fish fillets. The yield produced from the process of making fish fillets produced is only about 36% and the remaining 64% is waste that is lost in each processing process. Fish bones consist of organic compounds and inorganic compounds (minerals). The waste generated from the fish processing industry has the highest calcium content in the fish body. From the point of view of food and nutrition, fish bones are very rich in calcium that humans need, because the main elements of fish bones are calcium, phosphorus and carbonate. Thus, fish bone waste has great potential to be used as raw material for calcium-rich fish bone meal. In this study, the utilization of mackerel bones will be studied, so it is very important to know the formula for the best concentration of mackerel bone meal, to know the potential calcium content in mackerel bones. The characterization in this project is intended to determine and determine the experimental results quantitatively. The characterizations carried out in this study were atomic absorption spectrophotometer (AAS) to determine the levels of Ca, Fe and Zn and UV-Vis spectrophotometer to determine phosphate levels in mackerel bones. The results of the average mineral levels of Zinc, Iron, and Calcium respectively were 32.425 mg/100 gr, 4.3 mg/100 gr, and 213.825 mg/100gr. While the value of phosphate concentration in mackerel bone meal was 2784.116 ppm. This is in accordance with the standards of BPOM Keywords: fish bone waste, AAS analysis, UV-Vis analysis. Share Link | Plain Format | Corresponding Author (Ana Lailatul Farida)

98	Food Chemistry	ABS-177
ACE Inhibitors Activity of Tempeh Based on String Beans (Phaseolus vulgaris L.) and Black Soybean (Glycine soja (L) merrit) as Antihypertensive Functional Foods Sri Yadial Chalid, Afif Lailiyah, Anna Muawanah UIN Syarif Hidayatullah Jakarta Abstract String beans and black soybeans have a high protein content so that it has the potential as an antihypertensive functional food. Antihypertensive activity can be increased through fermentation using yeast and angkak. This study aims to produce tempeh from a mixture of string bean (Phaseolus vulgaris L.) and black soybeans (Glycine soja (L) merrit) which have ACE inhibitor activity as an antihypertensive functional food. String beans and black soybeans (1:1) are fermented using Rhizopus sp. 0,2% and Monascus purpureus (angkak) with variations concentration 1- 1,5- and 2 (%) in the range of 0-48 hours. The best fermentation time and angkak concentration are selected based on the results of the organoleptic test. Protein extraction was carried out by the isoelectric point method, then the levels of dissolved protein were tested, the degree of hydrolysis, and the activity of ACE inhibitors. Organoleptic test results obtained fermentation time and angkak concentration was 24 hours and 2% angkak concentration with a score of 3,80. The value of disolved protein levels obtained was 491,58 ppm, degree of hydrolysis 36,2%, and ACE inhibitor activity 57% with IC50 values 47,33 ppm. In general, tempeh based string bean and black soybean can inhibit ACE activity and have the potential as an antihypertensive functional food. Keywords: ACE inhibitors, angkak, black soybeans, functional food, string beans Share Link | Plain Format | Corresponding Author (Sri Yadial Chalid)

99	Food Chemistry	ABS-195
PHYSICOCHEMICAL ANALYSIS OF CEMPEDAK SEED FLOUR Suzihaque Maqsood-ul-Haque, Ana Amirul Ahmad, Habsah Alwi, Nurul Asyikin Md Zaki, Ummi Kalthum Ibrahim and Siti Fatma UNIVERSITI TEKNOLOGI MARA Abstract During the season, the fragrant exotic tropical fruit ^Cempedak^ (Artocarpus integer L.) is widely accessible in Malaysia and has a variety of health advantages. Due to a limitation of research data, cempedak seeds have limited relevance in the food processing business, despite their high nutritional content. In this study, the investigation of the physicochemical properties will provide information about the physical changes that may occur during the processing and development of food product. The parameter which discussed here includes bulk density, water absorption capacity, oil absorption capacity, and sugar content. Furthermore, by substituting cempedak seed flour with three other flours, such as wheat flour, rice flour, and bread flour, this study effort attempted to examine the sensory profile of noodle production. Cempedak seed flour was mixed with wheat flour, bread flour, and rice flour in a ratio of 1:1 to make the noodles. The goal of this substitution is to minimize the quantity of cempedak seed that is wasted and thrown away in bins while also allowing cempedak seed flour to be used as a commercial product in the culinary industry. Cempedak seed flour noodles with the substitution of bread flour received the highest overall acceptance score, followed by cempedak seed flour noodles with the substitution of wheat flour and rice flour. For cempedak seed flour noodles, all noodles fell into the ^like moderately^ to ^like very much^ category. Keywords: Cempedak, Physicochemical, Bulk Density, Oil Absorption Capacity, Water Absorption Capacity, Sugar Content. Share Link | Plain Format | Corresponding Author (Suzihaque Maqsood ul Haque)

100	Food Chemistry	ABS-219
Physicochemical and Sensory Changes of Sugar in The Making of Aloe Hard Candy Ai Mahmudatussaadah1*, Atat Siti Nurani1, Karpin1 Universitas Pendidikan Indonesia Abstract Sugar is one of the main ingredients in making hard candies. Aloe vera is added to make up for the lack of fiber content and adds another functional component of hard candy. Saponins and aloin can inhibit the growth of bacteria that cause dental caries. Aloe vera can improve the function of the pancreas in producing insulin, thus preventing diabetes. The critical point in making hard candy is the heating temperature. The purpose of this study was to analyze the critical temperature in the manufacture of hard candy. The method used is an experimental method with a completely randomized design with one factor. The results showed that too low a temperature will produce a soft texture and white crystals. Too high a temperature produces a blackish color and a bitter taste. The optimum temperature for making aloe vera hard candy is 130 C to 140 C. Keywords: Aloe vera, Functional food, Critical point, Hard candy. Share Link | Plain Format | Corresponding Author (Ai Mahmudatussaadah)

101	Industrial and Engineering Chemistry	ABS-7
Combining roles of mercapto-based corrosion inhibitor and inorganic layer for high corrosion resistance of commercial Mg alloy T. Suhartono(a) , M. P. Kamil(ab*) , Y. G. Ko(a*) a) Materials Electrochemistry Group, School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea b) National Research and Innovation Agency (BRIN), DKI Jakarta 10340, Indonesia Abstract Despite the growing interest in dealing with how to enhance corrosion properties of active metallic materials, a role of organic corrosion inhibitor has remained less understood with respect to the formation of hybrid architecture as well as the decrease in corrosion rate that might result in the electrochemical stability. To this end, the present work used three distinctive mercapto-benzazole (MB) compounds working as corrosion inhibitor, such as 2-mercaptobenzoxazole (MBO), 2-mercaptobenzothiazole (MBT), and 2-mercaptobenzimidazole (MBI) in a bid to understand how the geometrical structure arising from O, S, and N atoms affected the interaction toward defective inorganic layer. According to density functional theory calculations, MB compounds would be fairly adsorbed on inorganic surface through S atom at the mercapto-site. Moreover, the presence of two donor atoms close to the mercapto-site would reduce the adsorption tendency, which agreed well with the result of electrochemical measurements. For all cases used in this study, the reliable corrosion stability was provided for at least 36 h due to the coexistence of organic inhibitor and oxide-based coating. More interestingly, the corrosion properties of MBI was higher than the other candidates. This was attributed mainly to the fact that the whole formation of the ^grass-like^ hybrid structure with a uniform distribution occurred successfully as a result of molecular self-assembly triggered by an organic-inorganic interaction. The nucleation and growth of hybrid structure were discussed in relation to adsorption calculation and microstructural observation by considering the singular role of the mercapto-part in MB compounds responsible for extraordinary corrosion properties of Mg-based alloys. Keywords: Corrosion inhibitor- Mercapto-benzazole compound- Organic-inorganic interaction- Hybrid structure- Density functional theory- Electrochemistry. Share Link | Plain Format | Corresponding Author (TRI SUHARTONO)

102	Industrial and Engineering Chemistry	ABS-30
Iron oxide-decorated TiO2 layer via plasma-enhanced redox deposition as catalyst candidate Nisa Nashrah, Wail Al Zoubi, Young Gun Ko* School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea Abstract Metal oxide has advanced state-of-the-art functional applications including catalysis due to its decent stability in catalytic reactions compared to a single-metal system. However, a facile approach producing catalyst with comparable efficiency remain challenged. Here, we present uni-integrated system comprising nanoscale iron oxide decorating porous TiO2 layer via one-step plasma-enhanced redox deposition where a redox reaction of aqueous Fe (III) and Ti substrate with water in electrolyte occurs simultaneously. Both experimental results and computational calculations provide direct evidence of charge transfer behavior between Fe (III) and Ti (IV), demonstrating promising efficiency and selectivity toward catalytic hydrogenation up to 20 cycles. Furthermore, liquid chromatography-mass spectroscopy (LC-MS), in-situ Raman, and electron spin resonance (ESR) are performed to monitor the reaction mechanism. Keywords: Iron oxide, nanoparticle, deposition, catalysis Share Link | Plain Format | Corresponding Author (NISA NASHRAH)

103	Industrial and Engineering Chemistry	ABS-41
A novel composite coating of Mn3O4@TiO2 for balanced electrochemical and catalytic performance Rosy Amalia Kurnia Putri, Wail Al Zoubi, Young Gun Ko* School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea Abstract Metal oxide-based catalysts have attracted considerable interest owing to the highly efficient catalytic reactions during the degradation of organic compounds. However, the majority of catalysts in the form of powder suffer from aggregation and sintering on the surface of support, resulting in a significant loss in catalytic activity with increasing catalytic cycles. This work outlined the fabrication of Mn3O4@TiO2 composite coating via electron enhanced plasma electrolysis (EEPE) for electrochemical stability and catalytic application. The catalytic performance revealed that the composite coating outperforms most catalyst among the reported cases in terms of efficiency reaching nearly 100% and reusability up to five cycles. In addition, the composite coating demonstrates electrochemical stability against corrosive environment, which display the dual-features together on account of a synergy between the active species of Mn3O4 and TiO2 as a support. The mechanism of electron transfer between a catalyst surface and free radical molecules were discussed in relation to the efficiency and stability of the composite coating toward the degradation of methylene blue. Keywords: metal oxide, catalyst, electrochemical stability, composite, degradation Share Link | Plain Format | Corresponding Author (Rosy Amalia Kurnia Putri)

104	Industrial and Engineering Chemistry	ABS-42
A multilayer strategy for enhancing corrosion performance of Al alloy through closed-packed polymer as a top layer on a defective inorganic layer Early Zahwa Alharissa (a), Wail Al Zoubi (a), Young Gun Ko(a)* (a) Materials Electrochemistry Group, School of Material Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea. Abstract This present study puts forward of a unique multilayer concept comprised defective-inorganic layer as the first layer and closed-packed organic polymer as the second layer on commercial Al alloy and assessed the electrochemical performance subjected to plasma coating and static conversion respectively. First, the formation of a defective inorganic layer via plasma coating utilized alkaline-silicate based electrolyte in high voltage at ambient temperature by addition of V2O5 particle associated the chemical reaction that consisted of Al-O as main oxide and V-O as the incorporated oxide. Second, the closed-packed organic layer fabricated through static conversion into specific organic solution was triggered by the nucleation of the defective-inorganic layer. The surface structure and phase compositional were investigated for confirming the existence of double-layer sample through scanning electron microscopy (SEM), X-Ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), and Fourier Transform Infrared (FTIR). While the corrosion resistance assessment was obtained on the basis of Tafel extrapolation and electrochemical impedance spectroscopy with respect to equivalent circuit model interpretation. Accordingly, the corrosion performance of Al alloy would be enhanced significantly due to the synergistic effect arising from the role of closed-packed polymer and V2O5 as electron donor and acceptor, respectively. Keywords: Al alloy, multilayer, V2O5, closed-packed polymer, corrosion performance. Share Link | Plain Format | Corresponding Author (Early Zahwa Alharissa)

105	Industrial and Engineering Chemistry	ABS-44
Electron transfer by thiourea-based compounds as eco-friendly corrosion inhibitors on Al alloy for long-term corrosion response F. Hazmatulhaq, A. Chaouiki, Y. G. Ko* Materials Electrochemistry Group, School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea Abstract The present work reports the role of electron donor-acceptor behavior in thiourea-based corrosion inhibitor on enhancing the protective performance of Al alloy subjected to plasma electrolysis (PE). To this end, the PE-treated Al alloy was exposed to NaCl solutions containing thiourea-based compounds in long-term immersion to evaluate the effect of corrosion inhibitor on its morphological structure. A uniform plate-like layer identified as metal-organic complex was observed covering the surface of the PE-treated Al alloy, leading to the inhibition of corrosion during immersion. The mechanism underlying corrosion inhibition was evaluated by density functional theory (DFT) calculation. It was found that the heteroatoms along with benzene ring act as an adsorption sites which facilitate the electron transfer with PE-treated Al alloy via intermolecular interactions. As a results, the synergy between adsorbed thiourea and PE-treated Al surface plays a pivotal role in the formation of stable metal-organic complex responsible for excellent corrosion resistance. Keywords: Al alloy, plasma electrolysis, corrosion inhhibitor, electron transfer, corrosion resistance Share Link | Plain Format | Corresponding Author (Farah Hazmatulhaq)

106	Industrial and Engineering Chemistry	ABS-45
Ab-initio proposal of nature-inspired structure for functionalization Y. J. Sheng, W. A. Zoubi, Y. G. Ko* Materials Electrochemistry Group, School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea Abstract The functionalization of the inorganic surface by growing organic coating plays a critical role in improving the structural stability and catalytic activity of valve metals. However, the formation mechanism of hybrid architecture on the coating surface has remained less understood with respect to the configuration behavior of spatial structures. For this purpose, the present work aims at controlling the nucleation and self-assembly of hybrid architecture on the top of defective inorganic layer (IL) by utilizing micro-arc oxidation (MAO) and deep chemical coating (DCC). Then the self-assembly and chronological formation of 8-hydroxyquinoline (8-HQ) organic structure on the IL would be studied via a combination of experimental and theoretical approaches. 8-HQ is an appropriate candidate for the formation of well-organized 3D architectures due to its electron transfer behavior, which might be the important factor for the coordination and rearrangement of 8-HQ during nucleation and self-assemble. Lastly, catalysis property would be carried out under the exist of UV light to assess its photocatalysis performance. Keywords: Nature-inspired structure, low voltage, flower structure, self-assemble, photocatalysis Share Link | Plain Format | Corresponding Author (Yujun Sheng)

107	Industrial and Engineering Chemistry	ABS-47
Structural evolution of APh-LDH-MgO layers with nature-mimic architecture M.CHAFIQ- A.CHAOUIKI- Y.G.KO Materials Electrochemistry Group, School of Materials Science and engeneering, yeungnam university Gyongsan 38541, republic of korea Abstract Layered double hydroxides (LDH)-based materials are drawing considerable attention over the years in many fields. The controlled and flexible composition of the layers, as well as the wide range of possible anionic guests and easy adaptability for versatile applications, are some of many reasons for their wide usability. However, current LDH synthesis is usually in situ grown in autoclave under high temperature and high- pressure conditions. In this work, the possibility of direct synthesis of LDH on plasma electrolytic oxidation (PEO) treated magnesium alloy in the presence of a chelating agent (diethylenetriaminepentaacetic acid - DTPA) is reported to avoid hydrothermal autoclave conditions, which strongly limit wide industrial application of such coating systems. Herein, by optimizing the pH and duration of the LDH reaction, a three-dimensional assembly has been reported with architecture closely resembling interconnected nano &quot-petals&quot- producing 3D rosette-like structures. This LDH system was compared with the process in which an organic layer was fabricated on the top of LDH film using aminophenol (APh) compound in order to construct a hybrid architecture consisting of organic-inorganic self-assembly. This strategy results in a smart hierarchical structure which can provide robust LDH-APh film with superb anticorrosion performance. At the molecular level, the first-principles DFT calculations were used to provide theoretical understanding of the interfacial mechanism and elucidate the mutual interactions in LDH system. Keywords: Magnesium alloy, Layered double hydroxide, Plasma electrolysis, Chelation, rosette-like morphology. Share Link | Plain Format | Corresponding Author (Maryam Chafiq)

108	Industrial and Engineering Chemistry	ABS-103
Characterisation of blue pea flower extracts via microwave-assisted encapsulation Nurul Asyikin Md Zaki (a*, b), Junaidah Jai (a), Ummi Kalthum Ibrahim (a, b), Syafiza Abd Hashib (a), Habsah Alwi (a, b) (a) School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia. * asyikin6760[at]uitm.edu.my (b) Food Process Engineering Research Group, Universiti Teknologi MARA, Selangor, Shah Alam, Selangor, Malaysia. Abstract The preservation of beneficial active compounds from natural sources has become a growing interest in replacing synthetic ingredients, especially in food industry. Clitoria ternatea, or blue pea flower is among the popular plant with many active compounds such as the antioxidants and anthocyanins. Hence, this study focuses on the microwave-assisted encapsulation (MAEC) as an alternative technique in preservation of these active compounds from blue pea flower. The aims are to investigate the best formulation for MAEC of blue pea flower (BPF) and characterise the encapsulated BPF extract. Microwave-assisted encapsulation was carried out at three different powers (180, 300 and 450 W) with maltodextrin dextrose (MD) as carrier material. The encapsulation efficiency, antioxidant activity, dissolution and stability of anthocyanins in encapsulates were analysed. The findings show that microwave power level and encapsulation time have significant effects towards the characteristics of BPF encapsulates. The findings from this study prove that microwave-assisted encapsulation can preserve many beneficial active compounds and improve the characteristic and stability of anthocyanins in BPF extracts. Keywords: Clitoria ternatea, blue pea flower, antioxidant, anthocyanin, microwave encapsulation Share Link | Plain Format | Corresponding Author (Nurul Asyikin Md Zaki)

109	Industrial and Engineering Chemistry	ABS-114
Synthesis Nanocomposite Iron Oxide (Fe2O3)-Xanthan Gum for Chemical Flooding in Enhanced Oil Recovery (EOR) Technology Yong Richard Sriwijaya1, Paramita Jaya Ratri1*, Tirta Rona Mayangsari1,Azis Adharis1, Shabrina Sri Riswati 2 1. Departemen Chemistry, Faculty Science and Computer, Universitas Pertamina 2. Petroleum Engineering Department, Faculty of Earth and Energy Technology, Universitas Trisakti, Jakarta, 11440, Indonesia Abstract Chemical Flooding is a type of tertiary injection by injecting chemical material such as xanthan gum or hydrolyzed polyacrylamide have been reported successfully by % recovery around 60%. The development of the surfactant material as enhanced oil recovery is needed in order to provide the oil consumption. By the increasing viscosity in the crude oil, the conventional chemical flooding technology is not more affective. Therefore, the combination of chemical flooding with thermolysis technique start to develop. Silicate based nanoparticle such as zeolite or metal oxide has catalytic properties that can reduce the heavy crude oil viscosity. Xanthan gum as a biopolymer give % oil recovery higher than HPAM. However the modified xanthan gum with nanoparticle is quite limited number of paper. The objective of this research is to modify the xanthan gum with nanoparticle Fe2O3 in order to increasing its thermal, mechanical, and chemical properties. In this present study, several variation composition of xanthan gum and nanoparticle Fe2O3 have been made by the ratio 1:2 - 1:1 - and 2:1. Ratio 1:1 of nanocomposite is the optimum ratio in reducing contact angle in wettability for light crude oil. Meanwhile in heavy crude oil at 75oC the optimum composition is also nanocomposite with ratio 1:1. Keywords: Xanthan gum, Fe2O3, Enhanced Oil Recovery, Wettability Share Link | Plain Format | Corresponding Author (Paramita Jaya Ratri)

110	Industrial and Engineering Chemistry	ABS-149
Rheological Profile of Indonesian Waxy Crude Oil under Shearing Conditions Improved by Formulated Pour Point Depressant Dwi Febriantini, Agnesya Putri Gustianthy, Adam Kusuma Rianto, Ahlul Hafizan Resha, Indah Kurniawaty, Siska Pebriani, Usman, Bambang Purnomo Research & Technology Innovation, PT Pertamina (Persero) Abstract The formation of wax precipitation has become a significant trouble for the production, transportation, and refiner of crude oil. The trouble takes place when there is a disruption on the equilibrium of pressure and temperature as well as the composition of crude oil. Wax deposits will eventually result in reduction of fluid flow in the pipeline, and serious deposition will generate blockages. Chemical additives such as pour point depressant is currently applied in oil & gas industry to prevent the agglomeration of wax molecules thus decreases the wax deposition to the surfaces. The aim of this study was to investigate the performance of PT Pertamina (Persero)^s commercial pour point depressant (Pertaflow) on the rheological profile of Indonesian waxy crude oils under shearing conditions. The changes of chemical composition, pour point, wax content, average crystallization, and the rheological behavior of the crude oil were determined on this study. The results reveal that the addition of Pertaflow could be used to improve the flow of waxy crude oil and strongly affected by the difference in solubility of paraffin waxes and the chemical composition of the crude oils. Keywords: Indonesian crude oil, pour point depressant, rheology, wax inhibitor Share Link | Plain Format | Corresponding Author (Dwi Febriantini)

111	Inorganic Chemistry	ABS-5
IMMOBILIZATION OF AIR FILTER MADE OF CHITOSAN STABILIZED SILVER AND ZINC OXIDE NANOPARTICLES AND THE ANTIBACTERIAL PROPERTIES Muhammad Iqbal Hidayat1, Muhammad Adlim*1,2, Ilham Maulana3, Suhartono Suhartono4, Zinatul Hayati5, Noor Hana Hanif Abu Bakar6 1Graduate School of Mathematics and Applied Science, Universitas Syiah Kuala, Darussalam Banda Aceh, 23111, Indonesia 2Chemistry Department, FKIP, Universitas Syiah Kuala, Darussalam Banda Aceh, 23111, Indonesia 3Chemistry Department, Faculty of Math and Natural Science, Universitas Syiah Kuala, Darussalam Banda Aceh, 23111, Indonesia 4dBiology Department, Faculty of Math and Natural Science, Universitas Syiah Kuala, Darussalam Banda Aceh, 23111, Indonesia 5eDepartment of Microbiology, School of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia 6School of Chemical Science, University Sains Malaysia, 11800 USM, Penang, Malaysia Abstract An air-contaminated microorganism is being concerned indoors, especially during a disease outbreak- therefore, intensive study on antimicrobial air filters is growing. This study explores the preparation of stabilized and immobilized silver and zinc oxide nanoparticles and their antibacterial properties on simulated bacterial contaminated air. Chitosan stabilized silver nanoparticles (chi-Ag NPs) and chitosan stabilized zinc oxide nanoparticles (chi-ZnO NPs) have successfully prepared with the green chemistry method. Silver ion stabilized with chitosan, reduced with visible light irradiation, and immobilized onto silica gel beads. It has confirmed as nanoparticles in UV-Vis and TEM methods. Silica gel beads coated chi-Ag NPs (SiG chi-Ag NPs) prevented the growth of Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria in agar media. Silver was substituted with zinc oxide nanoparticles to minimize the processing costs. The immobilization of Zn ions and ZnO nanoparticles onto silica gel beads as compatible support has successfully studied and characterized. Silica gel beads coated chi-ZnO NPs (SiG chi-ZnO NPs) exhibited higher bacterial activities against Gram-positive and Gram-negative bacteria than SiG chi-Ag NPs. Keywords: Air filter, Immobilization, Chitosan, Silver nanoparticles, Zinc oxide nanoparticles, Antibacterial Share Link | Plain Format | Corresponding Author (M Adlim)

112	Inorganic Chemistry	ABS-8
One-pot synthesis and characterization of Magnesium Oxide nanoparticles prepared by Calliandra Calothyrsus Leaf Extract Indah Kurniawaty (a), Yoki Yulizar (a*), Haryo Satriya Oktaviano (b) a) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, 16424, Indonesia *yokiy[at]sci.ui.ac.id b) Research & Technology Innovation PT. Pertamina (Persero) Abstract Magnesium oxide nanoparticles (MgO NP) were successfully synthesized in this study using a one-pot green synthesis mediated by Calliandra Calothyrsus leaf extract (CLE). CLE was prepared by maceration of the leaf using methanol with a ratio of 1:5 for 7 days. Secondary metabolites in CLE, such as alkaloids and flavonoids, served as a weak base provider and capping agent in the formation of MgO NP. Shown CLE FTIR spectra peaks at 3255, 1600, 1384, 1205, 1041 and 667 cm-1, respectively, the presence of vibrations O-H stretching, N-H bending, C-C stretching, C-N stretching and N-H wagging. During the experiment, different CLE ratios and calcined temperatures were used, resulting in a variety of structures. EDS and FTIR were used to characterize metal oxide particles. MgO diffraction pattern at 2 theta of 36,9- 42,9- 62,2- 74,6- and 78,5 which can be assigned to crystal planes (111), (200), (220), (311), and (222), respectively. SEM was used to characterize the surface morphology. The morphology ranged from sphere to flower-like resulting in crystallite sizes of 28, 23, 12, and 9 nm. Keywords: Magnesium oxide nanoparticles, Calliandra Calothyrsus, green synthesis Share Link | Plain Format | Corresponding Author (Indah Kurniawaty)

113	Inorganic Chemistry	ABS-17
Effect of Thermal Treatment on The Characteristic of Porous Ceramic Based Natural Clay and Chitosan Biopolymer Precursors Suriati Eka Putri (a,b), Ahyar Ahmad (c*), Indah Raya (c), Rachmat Triandi Tjahjanto (d), Rizal Irfandi (e), Susilo Sudarman Desa (f) (a) Doctoral Program Student, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Hasanuddin University, Jalan Perintis Kemerdekaan Km. 20, Makassar, 90245, Indonesia (b) Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Makassar, Makassar, Jalan Daeng Tata Raya Makassar, 90244, Indonesia (c) Department of Chemistry, Faculty of Mathematics and Natural Science, Hasanuddin University, Jalan Perintis Kemerdekaan Km. 20, Makassar, 90245, Indonesia (d) Department of Chemistry, Faculty of Mathematics and Natural Science, Brawijaya University, Jalan Veteran Malang, 65145, Indonesia (e) Department of Biology Education, Faculty of Teacher Training and Education, Universitas Puangrimaggalatung, Jalan Sultan Hasanuddin, Madukkeleng Sengkang, 90915, Indonesia (f) School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, 12120, Thailand *ahyarahmad[at]gmail.com Abstract This study was conducted in order to determine the role of thermal treatment on crystallinity and pore characteristics of porous ceramic, which was prepared from natural clay (NC) and chitosan (CS) biopolymer using gelcasting method. CS were used as an environmentally friendly pore-forming agent. The applied temperature treatment was based on the results of thermal analysis (TGA/DTA) and following a sintering temperature of 900 to 1100 oC. The results show that the higher sintering temperature, the crystallinities of the ceramic decrease (72.42% to 68.72%) while the lattice strain increases (calculated from the Full Width at Half Maximum of the diffraction peak). The porosity of ceramic decreases by increasing the sintering temperature, whereas the formation of heterogeneous microstructure was observed. The resulting pore size for all temperature treatments was microporous (4.49 to 10.58 um). As suggestion, the resulting porous ceramics can be offered in several applications such as filters and catalytic membranes. Keywords: sintering, gelcasting, porous ceramic Share Link | Plain Format | Corresponding Author (Suriati Eka Putri)

114	Inorganic Chemistry	ABS-24
Implementation Innovative of e-Module on Learning Nonmetal Chemistry Based on KKNI Curriculum Elsa Febrina Tarigan(a*), Nurfajriani (b), Zainuddin Muchtar (c) (a)* Postgraduate Chemistry Education, Medan State University, Medan, Indonesia Jl. Willem Iskandar Psr .V, Medan (b,c) Postgraduate Department of Chemistry Education, Medan State University, Medan, Indonesia Jl. Willem Iskandar Psr .V, Medan Abstract The Covid-19 situation is strongly on because of reduce mobility. This makes system early learning conventional switch be online and educators should innovate make something innovative teaching materials for push spirit study with use latest ICT technology. For that, they need development innovative teaching materials that can be accessed both online and offline. The aim of mode this is to develop an e-module in learning nonmetal theory oxygen and sulfur based on the KKNI curriculum. This study uses ADDIE as a model for the development of learning materials. (Analysis- Design- Development -Implementation-Evaluation). The study involves 31 students of the Chemistry Study Program in the 2020 academic year. The results show that the increase in student learning outcomes after using an innovative e-module based on KKNI to achieve the high N-gain criteria of 0.75 and met the minimum competency standards and student responses were very good an average value of 89.1%. So it can be said that innovative KKNI-based e-modules can be used as a source of teaching materials. Keywords: Innovative Learning, KKNI, Inorganic Oxygen and Sulfur Share Link | Plain Format | Corresponding Author (Elsa Febrina Tarigan)

115	Inorganic Chemistry	ABS-25
Design Anticancer Potential of Zn(II)Isoleucinedithiocarbamate Complex on MCF-7 Cell Lines: Synthesis, Characterization, Molecular Docking, Molecular Dynamic, ADMET, and In-Vitro Studies Rizal Irfandi(a,b), Indah Raya(c*), Ahyar Ahmad(c), Ahmad Fudholi(d,e), Riswandi(c), Santi Santi(f), Wynda Puspa Azalea(g), Suriati Eka Putri(h), Samuel Olawale Olubode(i) a)Doctoral Program, Department of Chemistry, Faculty of Mathematics, and Natural Science, Hasanuddin University, Makassar 90245, Indonesia b)Department of Biology Education, Faculty of Teacher Training and Education, Universitas Puangrimaggalatung, Sengkang 90915, Indonesia c)Department of Chemistry, Faculty of Mathematics, and Natural Science, Hasanuddin University Makassar 90245, Indonesia *indahraya[at]unhas.ac.id d)Solar Energy Research Institute, Universiti Kebangsaan Malaysia, UKM Bangi, Selangor 43600, Malaysia e)Research Centre for Electrical Power and Mechatronics, Institute of Science (LIPI), Bandung, Indonesia g Research Center of Smart Molecules and Natural Genetic Resources, Brawijaya University, Malang, Indonesia f)Medical Laboratory Technology, Faculty of Health Technology, Megarezky University, Makassar 90234, Indonesia g)OKU Selatan District Health Office, Faculty of Pharmacy Pancasila University Jakarta 12620, Indonesia h)Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Makassar, Makassar, Jalan Daeng Tata Raya Makassar, 90244, Indonesia i)Department of Biochemistry, Adekunle Ajasin University Akungba Akoko, Ondo State, Nigeria. Abstract Cisplatin which is commonly used today as a cancer drug, still leaves some problems such as showing toxic properties in the body. New complex has been designed as a potential anticancer drug candidate by minimizing its toxic properties to the body. The complex synthesis method was carried out in situ by mixing the ingredients in one step, namely ZnCl2 and isoleucineditiocarbamate in a ratio of 3:5 mmol. The Zn complexes were characterized by UV Vis spectroscopy, FTIR, determination of melting point, conductivity, and HOMO LUMO were studied. Computational NMR spectrum analysis was performed. Molecular docking results of Zn Isoleucinedithiocarbamate against HIF1 showed that the Zn complex was a good HIF1 inhibitor by showing a docking score of 6.6, having hydrogen bonds with ARG 17, VAL264 and GLU15. Also having alkyl bonds with TRP27 ans LEU32, and Pi-Alkyl bonds with PRO41 and ARG44. The mechanism of action of the active representative compounds was identified by molecular dynamics simulation. Anticancer potency of Zn isoleucinedithiocarbamate against MCF7 cells at an IC50 value of 362.70 gmL showed changes in cancer cell morphology. Zn(II) Isoleucineedithiocarbamate complex has potential as an anticancer compound because it has a significant inhibitory effect on breast cancer cells (MCF7). Based on the study ADMET has characteristics like a good drug with lower toxicity. Keywords: Dithiocarbamate, Zn(II), Isoleucine, In-vitro, ADMET, cancer Share Link | Plain Format | Corresponding Author (Rizal Irfandi)

116	Inorganic Chemistry	ABS-54
Antibacterial performance of B/N doped ZnO Silmi Rahma Amelia (a), Anggun Tamy Y (a), Fazriah Ulpah (a), Dhea Nafthalia A (a), Tety Sudiarti (a*), Atthar Luqman Ivansyah (b) (a) Chemistry Science, Science and Technology Faculty, UIN Sunan Gunung Djati, Indonesia (a) Chemistry Science, Science and Technology Faculty, UIN Sunan Gunung Djati, Indonesia (a) Chemistry Science, Science and Technology Faculty, UIN Sunan Gunung Djati, Indonesia (a) Chemistry Science, Science and Technology Faculty, UIN Sunan Gunung Djati, Indonesia (a) Chemistry Science, Science and Technology Faculty, UIN Sunan Gunung Djati, Indonesia *tety.sudiarti[at]uinsgd.ac.id (b) Chemistry Science, Institut Teknologi Bandung, Indonesia Abstract Nanoscale materials are many developed at this time due to their excellent biocompatibility and chemical stability. This material can be used for biomedical applications such as drug carrier, cell or DNA separation, antimicrobial, wastewater cleaning, etc. Hence, undoped ZnO nanoparticles and B/N doped ZnO nanoparticles were prepared using the solid-state method at 500 degrees Celcius for 5 hours. The prepared materials were characterized by standard analytical techniques such as XRD and SEM. The results of the XRD analysis showed that undoped ZnO and B/N doped ZnO were successfully synthesized because they have the same peak as the ZnO standard (JCPDS No. 01-079-0205), and then the structure is hexagonal wurtzite with the average crystal size being 29.02 nm and 24.54 nm, respectively. Characterization with SEM showed the morphology of undoped ZnO was rod-shaped and had a non-uniform size, while B/N doped ZnO has almost spherical particles. The particle sizes of the undoped ZnO are 94.35 and 62.82 nm for B/N doped ZnO. The antibacterial property of the synthesized materials was evaluated against Gram-positive Staphylococcus aureus, and Gram-negative Escherichia coli with control positive and control negative is amoxicillin and aquabidest, respectively. This investigation revealed that the synthesized materials were able to inhibit the activity of Escherichia coli better than Staphylococcus aureus with the diameter of inhibition of 9.25 mm for undoped ZnO and 8.80 mm for B/N doped ZnO. Keywords: ZnO, B/N doped ZnO, Solid-state method, Antibacterial studies Share Link | Plain Format | Corresponding Author (Silmi Rahma Amelia)

117	Inorganic Chemistry	ABS-87
Effect of Sintering Temperature on The Microstructure Behaviour of Gelcasted Porous Ceramics Using Cassava Starch as Pore Template Suriati Eka Putri (a*), Diana Eka Pratiwi (a), Rachmat Triandi Tjahjanto (b), Heryanto Heryanto (c), Abd Rahman (d) (a) Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Makassar, Makassar, Jalan Daeng Tata Raya Makassar, 90244, Indonesia *ekaputri_chem[at]unm.ac.id (b) Department of Chemistry, Faculty of Mathematics and Natural Science, Brawijaya University, Jalan Veteran Malang, 65145, Indonesia (c) Department of Physics, Faculty of Mathematics and Natural Science, Hasanuddin University, Jalan Perintis Kemerdekaan Km. 20, Makassar, 90245, Indonesia (d) Inorganic Chemistry, King Fahd University of Petroleum & Minerals, Academic Belt Road, Dhahran, 31261, Arab Saudi Abstract Porous ceramics were prepared by gelcasting method from natural clay of kaolinite with 20 wt% cassava starch as gelling agent and pore-template. Cassava starch is used as an environmentally friendly pore-template material. Dry mixture compacted pellets were calcined for 2 hours at three sintering temperatures: 900, 1000, and 1100 oC. Sintering temperature^s effect on ceramic properties, such as porosity, hardness, morphology, crystallinity, and lattice strain, were examined. The results showed that the higher sintering temperature the porosity of the ceramic decreased and the hardness of the ceramic increased, then the higher sintering temperature, the crystallinity of the ceramic decreased (78.24% to 62.29%) while the lattice strain increased (calculated from the Full Width at Half Maximum peak diffraction). The resulting pore size for all temperature treatments was microporous (0.16-6.52 um). To produce a porous ceramic (29.19 vol% porosity) with a good hardness (108 HB), the optimum sintering temperature was determined to be 1100 oC. The resulting pellet-shaped porous ceramic is expected to be used as a future catalyst support and wastewater filter. Keywords: gel casting, porous ceramic, lattice strain Share Link | Plain Format | Corresponding Author (Suriati Eka Putri)

118	Inorganic Chemistry	ABS-97
NiFe2O4-Hydroxyapatite Nanocomposite Synthesized Using Pensi Shells (Corbicula Moltkiana) as Hydroxyapatite Raw Material and Its Activity Rahmayeni*, Yeni Setiadi Universitas Andalas, Kampus Limau Manis Abstract \(NiFe_2 O_4 \)-hydroxyapatite (\(NiFe_2 O_4 \)-HA) nanopowders were synthesized hydrothermally using Piper betle L. extract as a capping agent and pensi (Corbicula moltkiana) shells as the raw material for hydroxyapatite. The powders were characterized by X-Ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR), Scanning Microscopy Electron (FESEM), and Vibrating Sampler Magnetization (VSM). XRD pattern shows the specific peaks of hydroxyapatite that appeared at \(2 \theta \) of \(28.00^o\), \(32.42^o\), and \(34.34^o\) which are relevant to the standard of hydroxyapatite, and the specific peaks of \(NiFe_2 O_4 \) at \(2 \theta \) of \(30.2^o\), \(35.6^o\), and \(43.3^o\), which correspond to the ferrite spinel structure. Based on the FTIR spectrum, two main absorptions of metal and oxygen were found associated with the spinel ferrite structure at wave numbers of ~400 and ~600 \(cm^{-1} \). The \(M^{2+}\) ions are in the octahedral site, while the \(Fe^{3+}\) ions are in the tetrahedral site in the spinel structure. The results of FESEM characterization show the morphology of the nanocomposite in the form of granular evenly distributed. The synthesized nanoparticles showed ferrimagnetic properties as shown by VSM. The nanocomposite \(NiFe_2 O_4 \)-HA showed the percent effective drug release occurred in 3 hours at 81%. Keywords: MFe2O4-HAp, Corbicula moltkiana, hydrothermal, ferrimagnetic, drug delivery Share Link | Plain Format | Corresponding Author (Rahmayeni Rahmayeni)

119	Inorganic Chemistry	ABS-104
Multistep colorization of Co(OH)2/Ni(OH)2 electrochromic film prepared by a simple chemical bath deposition method M Alvien Ghifari (a*), Desti Riandiani (a), Juwita Sari (a), I Putu Mahendra (a), Demi Dama Yanti (a), Indah Puspita Sari (b) Yayuk Astuti (c) Adi Darmawan (c) a) Department of Chemistry, Faculty of Science, Institut Teknologi Sumatera, Jalan Terusan Ryacudu, Lampung Selatan, 35365, Indonesia *m.ghifari[at]ki.itera.ac.id b) Department of Cosmetic Engineering, Faculty of Production and Industry Technology, Institut Teknologi Sumatera, Jalan Terusan Ryacudu, Lampung Selatan, 35365, Indonesia c) Department of Chemistry, Faculty of Science and Mathematic, Diponegoro University, Jalan Prof. Prof Sudharto, SH, Semarang 50275, Indonesia Abstract Electrochromic-based smart windows offer the controlling ability of sunlight irradiation under applied voltage. In this study, electrochromic film of Co(OH)2/Ni(OH)2 composites on ITO glass was successfully synthesized by simple chemical bath deposition. Two different processes were conducted to investigate the optical character of the deposited film. The characteristics of the composites were analyzed by UV-Vis, XRD, and SEM. All Co(OH)2/Ni(OH)2 films exhibit stepping colorizations under various applied voltages. The transmittance change (\triangle\T) and optical density (\triangle\OD) of the mixed Co(OH)2/Ni(OH)2 at 500 nm under 0.15 and 0.75 V are 11.10 % and 0.09, and 50.14 %, and 0.91 . Meanwhile, \triangle\T and &\triangle\OD of the double-layer Co(OH)2/Ni(OH)2 are 1.36 % and 0.13, and 9.64 % and 9.31 under same conditions. The results show that Co(OH)2 addition is beneficial to get step colorization in Ni(OH)2 electrochromic film. The mixed Co(OH)2/Ni(OH)2 has better optical modulation than double-layer Co(OH)2/Ni(OH)2. Keywords: Electrochromic, composite, Co(OH)2, Ni(OH)2, chemical bath Share Link | Plain Format | Corresponding Author (M Alvien Ghifari)

120	Inorganic Chemistry	ABS-109
Optimization of Absorption Parameters Cu(II) and Cd(II) in Textile Waste Using Adsorbents of Coconut Fibers in Plackett Burman Experimental Design Senadi Budiman, Lisda Virdasari, Arie Hardian Department of Chemistry, Faculty of Science and Informatics, Universitas Jenderal Achmad Yani Abstract Industrial activities are currently growing rapidly, especially the textile industry. Where the textile industry produces heavy metal waste, one of the hazardous heavy metals that are often found from textile waste is Cu(II) and Cd(II) ions. Ion absorption Cu(II) and Cd(II) are carried out by adsorption method using adsorbents of coconut fiber activated carbon using Plackett Burman experimental design. This study aims to determine the influential parameters using Plackett Burman^ s design. Selection of 9 parameters to the response that is analyzed with AAS is used for the absorption of ionss Cu(II) and Cd(II) including particle size, contact time, stirring speed, temperature, pH, Volume, concentration Cu(II), adsorbent and concentration Cd(II). In addition, to know the ability of coconut coir adsorbents in absorbing ion Cu(II) and Cd(II) in textile waste. Condition obtained through selection on parameters that affect the absorption of ions Cu(II) and Cd(II) using plackett burman design that all parameters tend to influence a separation, Adsorbent ability of coconut fiber in absorbing ion Cu(II) and Cd(II) in textile waste obtained Activated carbon coconut fiber absorbs 25.26 % ion Cu(II) with absorption capacity of 0.42 mg/g, while ion absorption Cd(II) has absorption efficiency of 46.46% with absorption capacity of 0.98 mg/g. Keywords: Adsorption- Activated Carbon- Ion Cu(II)- Ion Cd(II)- Plackett Burman Share Link | Plain Format | Corresponding Author (Senadi Budiman)

Page 4 (data 91 to 120 of 207) | Displayed ini 30 data/page
<< PREV 1 2 3 4 5 6 7 NEXT >>

Powered By Konfrenzi Ultimate 1.832M-Build3 © 2007-2024 All Rights Reserved