Proceedings of the 1st International MIPAnet Conference on Science and Mathematics最新文献_第3页

Synthesis of Semi Interpenetrating Polymer Network’s Hydrogel from Bacterial Cellulose 利用细菌纤维素合成半互穿聚合物网络水凝胶

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010132800002775

P. Rizky, .. Tamrin, .. Marpongahtun

引用次数: 0

Local Antimagic Vertex Coloring of Wheel Graph and Helm Graph 车轮图和舵机图的局部反幻顶点着色

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010138400002775

F. F. Hadiputra, D. R. Silaban, T. Maryati

引用次数: 0

The Effect of Methyl Oleate Variation as a Template in Synthesis of Silica Mesoporous using Tetraethylorthosolocate (TEOS) 油酸甲酯变化模板剂对四乙基绿索酸酯(TEOS)合成介孔硅的影响

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010137000002775

Silvia Afriani Sitinjak, .. Andriayani

引用次数: 0

Synthesis of Antimicrobial and Emulsifier Compunds through Hydroxyl Group Esterification of Oxidized Ricinoleic Acid 氧化蓖麻油酸羟基酯化合成抗菌及乳化剂化合物

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010133000002775

Rifqah Azzahra Naulidia, S. Handayani, S. Setiasih, S. Hudiyono

{"title":"Synthesis of Antimicrobial and Emulsifier Compunds through Hydroxyl Group Esterification of Oxidized Ricinoleic Acid","authors":"Rifqah Azzahra Naulidia, S. Handayani, S. Setiasih, S. Hudiyono","doi":"10.5220/0010133000002775","DOIUrl":"https://doi.org/10.5220/0010133000002775","url":null,"abstract":": In this study, ester synthesis from commercial oxidized ricinoleic acid using various carboxylic acid was conducted. The double bond in ricinoleic acid was oxidized using KMnO 4 in alkaline condition to form two hydroxyl groups. Oxidized ricinoleic acid was then esterified chemically using palmitic acid, decanoic acid, and butyric acid by ZnCl 2 as catalyst with the molar ratio of oxidized ricinoleic acid to carboxylic acid was 3:1. Esters produced were characterized using FTIR examined as emulsifier and the antimicrobial activity. The results showed that each ester product gave absorption band C=O ester at the range of 1600 cm -1 -1720 cm -1 . The highest conversion percentage of esterification was obtained by oxidized ricinoleic acid-palmitic acid esters with the value of 75%. Simple emulsifier test was performed for each ester and the result showed that esters were able to maintain an emulsion form approximately 24 hours with water-in-oil emulsion (w/o) type. The antimicrobial activity test of esters gave positive results in the presence of inhibition zone to the growth of Propionibacterium acnes and Staphylococcus epidermidis . The highest antimicrobial activity against P. acnes and S. epidermidis was produced by oxidized ricinoleic acid-decanoic acid esters.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"84 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130043202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flavonoid Compound from Rambutan Bark (Nephelium lappaceum L.) 红毛丹树皮类黄酮化合物

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010139100002775

H. Br Sembiring, Mesy Jelisa

{"title":"Flavonoid Compound from Rambutan Bark (Nephelium lappaceum L.)","authors":"H. Br Sembiring, Mesy Jelisa","doi":"10.5220/0010139100002775","DOIUrl":"https://doi.org/10.5220/0010139100002775","url":null,"abstract":": Flavonoids included polyphenol compounds that are found in many plants which are important compounds in human food.The flavonoid group, including flavanone, flavone, dihydroflavonol, catechin, flavonol, flavan-3-ols, isoflavones, auron, anthocyanidins, proanthocyanidins and chalcones, has a general structure of C6-C3-C6. The aims of this study is to isolate and identify the group of flavonoid compound contained in rambutanbark ( Nephelium lappaceum L.). Rambutan bark powder was extracted maceration with methanol. Methanol extract was dissolved with ethyl acetate repeatedly until the solution was negative flavonoids. Ethyl acetate extract was dissolved with methanol and partitioned with n -hexane. The methanol extract which is a total of flavonoids separated by column chromatography using chloroform: methanol (90:10; 80:20 and 70:30 (v/v)). The isolates obtained were purified by preparative thin layer chromatography and producing flavonoid glycoside, yellow amorphous with Rf value of 0.25 using the chloroform: ethyl acetate eluent (50:50) v/v. The pure isolate obtained were analyzed by UV-Visible Spectropometer, FT-IR, and H-NMR. Based on the interpretation of spectroscopic data, the flavonoid compound isolated from rambutan bark wasflavonol group.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"328 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124631056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimum Stocks Portfolio Selection using Fuzzy Decision Theory 基于模糊决策理论的最优股票投资组合选择

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010137400002775

L. Chin, E. Chendra, A. Sukmana

{"title":"Optimum Stocks Portfolio Selection using Fuzzy Decision Theory","authors":"L. Chin, E. Chendra, A. Sukmana","doi":"10.5220/0010137400002775","DOIUrl":"https://doi.org/10.5220/0010137400002775","url":null,"abstract":": An investor wants the value of his or her money does not have a decline in value against inflation. For this reason, investors need to invest in financial instruments, one of which is stocks. Thus, investors need to create an optimum stock portfolio. Generally, the factors considered by investors in creating an optimum portfolio are expectations of return and portfolio risk. However, besides these two factors, the liquidity is also an important factor to be considered. These three factors will be discussed in this paper to form an optimum portfolio. In addition, because stock transactions use lot units, the optimization problem here is a mixed-integer linear programming optimization problem that will be solved using the Branch and Bound algorithm that is available in toolbox Matlab 2016. This optimization problem will be applied to the formation of a portfolio consisting of stocks in LQ45 index. The LQ45 Stock Index was chosen because shares in this index have high liquidity levels according to the Indonesia Stock Exchange. The computation results show that the portfolio rebalancing model can form a portfolio based on the level of satisfaction of investor.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121980416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Application of Discriminant Analysis to Determine the Classifications of Human Trafficking Cases in East Nusa Tenggara (ENT) Province 应用判别分析确定东努沙登加拉省人口贩运案件分类

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010139500002775

Maria Agustina Kleden, Astri Atti, U. Gerardus

引用次数: 0

Sensitivity of Colletotrichum Capsici Isolated from Chili Pepper (Capsicum annum) against Synthetic Fungicides 辣椒炭疽菌对合成杀菌剂的敏感性研究

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010205400002775

.. Sartini, Saipul Sihotang

引用次数: 0

Infinite Trees with Finite Dimensions 有限维的无限树

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0009876300002775

Yusuf Hafidh, E. Baskoro

引用次数: 0

Hydrocracking of Mefa Rubber Seed Oil into Biofuels Fraction with Co and CoMo Metals Supported on Zeolite Catalyst 沸石催化剂负载Co和CoMo金属加氢裂化Mefa橡胶籽油制备生物燃料馏分

Proceedings of the 1st International MIPAnet Conference on Science and Mathematics Pub Date : 1900-01-01 DOI: 10.5220/0010152200002775

Junifa Layla Sihombing, .. Herlinawati, Asep Wahyu Nugraha, Ahmad Nasir Pulungan, M. Zubir, Tiamina Nasution, Ary Anggara Wibowo, S. Gea

{"title":"Hydrocracking of Mefa Rubber Seed Oil into Biofuels Fraction with Co and CoMo Metals Supported on Zeolite Catalyst","authors":"Junifa Layla Sihombing, .. Herlinawati, Asep Wahyu Nugraha, Ahmad Nasir Pulungan, M. Zubir, Tiamina Nasution, Ary Anggara Wibowo, S. Gea","doi":"10.5220/0010152200002775","DOIUrl":"https://doi.org/10.5220/0010152200002775","url":null,"abstract":": This research was aimed to produce biofuel fraction from rubber seed oil by using synthetic Zeolite Y (ZY), Co/ZY and CoMo/ZY catalyst. The insertion of metal used a wet impregnation method. Furthermore, in order to produce a good catalyst, the oxidation and reduction process at 500 o C using oxygen and nitrogen gases at approximately 2 hours were performed. Then, the effect of addition of ZY, Co/ZY and CoMo/ZY had been investigated at catalytic hydrocracking using metyl ester fatty acid (MEFA). The reaction was conducted at 450 o C with ratio of catalyst:feed of 1:4 and 20 mL/sec with hydrogen gas flow. Moreover, the characterization of catalyst depicted that no significant changes in wavenumber of TO4 groups and a crys-tallinity of catalyst. Then, the crystal system of ZY and Co/ZY was indicated as monoclinic while CoMo/ZY was revealed as triclinic. The surface area, pore volume and mean pore of catalysts revealed an increase trend as a result of Co and Mo impregnation. These trends have also been proven with SEM analysis which was shown an equal spreading of metals in the catalysts. Furthermore, the highest result of catalytic performance among catalysts was shown by CoMo/ZY with 59.45% of bio-gasoline. To sum up, the impregnation of Co and CoMo in Zeolit Y depicted a well-effect on its selectivity into bio-gasoline product.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127914421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0