Pub Date : 1900-01-01DOI: 10.5220/0010138400002775
F. F. Hadiputra, D. R. Silaban, T. Maryati
: Let 𝜒(cid:4666)𝐺(cid:4667) be a chromatic number of vertex coloring of a graph G. A bijection 𝑓: 𝐸 → (cid:4668)1,2,3, … ,|𝐸(cid:4666)𝐺(cid:4667)|(cid:4669) is called local antimagic vertex coloring if for any adjacent vertices do not share the same weight, where the weight of a vertex in 𝐺 is the sum of the label of edges incident to it. We denote the minimum number of distinct weight of vertices in 𝐺 so that the graph 𝐺 admits a local antimagic vertex coloring as 𝜒 (cid:3039)(cid:3028) (cid:4666)𝐺(cid:4667) . In this study, we established the missing value of 𝜒 (cid:3039)(cid:3028) for a case in wheel graph and 𝜒 (cid:3039)(cid:3028) for helm graph.
{"title":"Local Antimagic Vertex Coloring of Wheel Graph and Helm Graph","authors":"F. F. Hadiputra, D. R. Silaban, T. Maryati","doi":"10.5220/0010138400002775","DOIUrl":"https://doi.org/10.5220/0010138400002775","url":null,"abstract":": Let 𝜒(cid:4666)𝐺(cid:4667) be a chromatic number of vertex coloring of a graph G. A bijection 𝑓: 𝐸 → (cid:4668)1,2,3, … ,|𝐸(cid:4666)𝐺(cid:4667)|(cid:4669) is called local antimagic vertex coloring if for any adjacent vertices do not share the same weight, where the weight of a vertex in 𝐺 is the sum of the label of edges incident to it. We denote the minimum number of distinct weight of vertices in 𝐺 so that the graph 𝐺 admits a local antimagic vertex coloring as 𝜒 (cid:3039)(cid:3028) (cid:4666)𝐺(cid:4667) . In this study, we established the missing value of 𝜒 (cid:3039)(cid:3028) for a case in wheel graph and 𝜒 (cid:3039)(cid:3028) for helm graph.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"1 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":"114299369","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}
Pub Date : 1900-01-01DOI: 10.5220/0010139500002775
Maria Agustina Kleden, Astri Atti, U. Gerardus
{"title":"The Application of Discriminant Analysis to Determine the Classifications of Human Trafficking Cases in East Nusa Tenggara (ENT) Province","authors":"Maria Agustina Kleden, Astri Atti, U. Gerardus","doi":"10.5220/0010139500002775","DOIUrl":"https://doi.org/10.5220/0010139500002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"53 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120875468","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}
Pub Date : 1900-01-01DOI: 10.5220/0010137000002775
Silvia Afriani Sitinjak, .. Andriayani
{"title":"The Effect of Methyl Oleate Variation as a Template in Synthesis of Silica Mesoporous using Tetraethylorthosolocate (TEOS)","authors":"Silvia Afriani Sitinjak, .. Andriayani","doi":"10.5220/0010137000002775","DOIUrl":"https://doi.org/10.5220/0010137000002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"57 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":"125940704","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}
Pub Date : 1900-01-01DOI: 10.5220/0010205400002775
.. Sartini, Saipul Sihotang
Abstract
摘要
{"title":"Sensitivity of Colletotrichum Capsici Isolated from Chili Pepper (Capsicum annum) against Synthetic Fungicides","authors":".. Sartini, Saipul Sihotang","doi":"10.5220/0010205400002775","DOIUrl":"https://doi.org/10.5220/0010205400002775","url":null,"abstract":"Abstract","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":"126590567","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}
Pub Date : 1900-01-01DOI: 10.5220/0010133000002775
Rifqah Azzahra Naulidia, S. Handayani, S. Setiasih, S. Hudiyono
: 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.
本研究以工业氧化蓖麻油酸为原料，采用多种羧酸合成酯。用kmno4在碱性条件下氧化蓖麻油酸中的双键，生成两个羟基。以氯化锌为催化剂，以棕榈酸、癸酸、丁酸为原料，氧化蓖麻油酸与羧酸的摩尔比为3:1，进行化学酯化反应。用红外光谱(FTIR)对所得酯类进行了表征，并对其作为乳化剂和抗菌活性进行了研究。结果表明，各酯产物在1600 cm -1 ~ 1720 cm -1范围内具有C=O酯的吸收带。氧化蓖麻油酸-棕榈酸酯的酯化转化率最高，为75%。对每一种酯类进行了简单的乳化剂试验，结果表明，酯类在油包水(w/o)型乳化液中能保持约24小时的乳化液形态。在抑菌带存在的情况下，酯类对痤疮丙酸杆菌和表皮葡萄球菌的抑菌活性试验呈阳性。氧化蓖麻油酸-癸酸酯对痤疮链球菌和表皮葡萄球菌的抑菌活性最高。
{"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}
Pub Date : 1900-01-01DOI: 10.5220/0010204800002775
.. Ramlan, D. Setiabudidaya, A. Bama, A. Johan, .. Muljadi, P. Sardjono
{"title":"Synthesis and Characterization of Strontium Hexa Ferrite (SrFe12O19) Powder by using Powder Metallurgy Method","authors":".. Ramlan, D. Setiabudidaya, A. Bama, A. Johan, .. Muljadi, P. Sardjono","doi":"10.5220/0010204800002775","DOIUrl":"https://doi.org/10.5220/0010204800002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"321 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":"122869508","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}
Pub Date : 1900-01-01DOI: 10.5220/0010139700002775
.. Marpongahtun, .. Irmayani, S. A.
: Utilization of coconut shell soot as raw material for making carbon dots has been successfully carried out. This study used coconut shell soot with 5 M HNO 3 acid oxidation method which is then the Carbon dots characteristics were determined using UV light, UV-Vis, TEM analysis, and functional group analysis with FT-IR. Coconut shell soot is obtained by pyrolysis method. The heating process using a furnace carried out for 2 hours at 400 °C. Carbon dots produced by heating with 5 M HNO 3 for 12 hours at 100 °C, centrifuged and dialysis. The yield of carbon dots was 87%. The FT-IR spectrum shows that the Carbon dots formed produce OH group absorption at 3396 cm -1 , absorption of C = C at wave number 1637 cm -1 , absorption of CO groups, and CH at wave number 1339 cm -1 , and 835 cm -1 . Analysis with Transmission Electron Microscopy shows that carbon dots has an average diameter of 1.50 nm. Absorbance spectrum analysis (UV-Vis) results in the appearance of new uptake showing the electron transition at a wavelength of 307 nm and giving green fluorescence under UV light.
利用椰壳烟灰为原料制备碳点已成功。本研究采用5 M hno3酸氧化法对椰壳烟灰进行了碳点特性的测定，采用紫外光、紫外可见光谱、透射电镜和红外光谱对其进行了官能团分析。采用热解法制备椰壳烟尘。加热过程采用加热炉在400°C下进行2小时。用5 M hno3在100℃下加热12小时，离心和透析产生的碳点。碳点的收率为87%。FT-IR光谱表明，形成的碳点在3396 cm -1处产生OH基团吸收，在1637 cm -1处产生C = C吸收，在1339 cm -1和835 cm -1处产生CO基团吸收和CH吸收。透射电镜分析表明，碳点的平均直径为1.50 nm。吸收光谱分析(UV- vis)结果显示在307 nm波长处出现新的吸收，并在紫外光下发出绿色荧光。
{"title":"Utilization of Coconut Waste as a Basic Material for Making Carbon Dots with Acid Oxidation Method","authors":".. Marpongahtun, .. Irmayani, S. A.","doi":"10.5220/0010139700002775","DOIUrl":"https://doi.org/10.5220/0010139700002775","url":null,"abstract":": Utilization of coconut shell soot as raw material for making carbon dots has been successfully carried out. This study used coconut shell soot with 5 M HNO 3 acid oxidation method which is then the Carbon dots characteristics were determined using UV light, UV-Vis, TEM analysis, and functional group analysis with FT-IR. Coconut shell soot is obtained by pyrolysis method. The heating process using a furnace carried out for 2 hours at 400 °C. Carbon dots produced by heating with 5 M HNO 3 for 12 hours at 100 °C, centrifuged and dialysis. The yield of carbon dots was 87%. The FT-IR spectrum shows that the Carbon dots formed produce OH group absorption at 3396 cm -1 , absorption of C = C at wave number 1637 cm -1 , absorption of CO groups, and CH at wave number 1339 cm -1 , and 835 cm -1 . Analysis with Transmission Electron Microscopy shows that carbon dots has an average diameter of 1.50 nm. Absorbance spectrum analysis (UV-Vis) results in the appearance of new uptake showing the electron transition at a wavelength of 307 nm and giving green fluorescence under UV light.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"27 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":"115449949","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}
{"title":"Utilization of Alginate Powder Strenged with Silicon Rubber as Composite Bolus Material for Radiotheraphy 8 Mev Energy","authors":"Herty Afrina Sianturi, J. Marbun, .. Ikhwanuddin, .. Azhari, Lincewati Sidauruk","doi":"10.5220/0010139200002775","DOIUrl":"https://doi.org/10.5220/0010139200002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"2 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":"115328371","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}
Pub Date : 1900-01-01DOI: 10.5220/0010200500002775
Nasruddin M. Noer, Harris Fadhilla Said, Z. Noer, S. Rahayu
{"title":"The Development of Microcontroller-based Electrostatic Air Filter Device using Flyback Transformer","authors":"Nasruddin M. Noer, Harris Fadhilla Said, Z. Noer, S. Rahayu","doi":"10.5220/0010200500002775","DOIUrl":"https://doi.org/10.5220/0010200500002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"85 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":"114877037","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}
Pub Date : 1900-01-01DOI: 10.5220/0010138500002775
J. Sitinjak, H. Nasution, M. Lubis
: Bamboo fiber (Bambuseae) has cellulose content that can be used as a filler in the composites. The objective of this study is to obtain alpha cellulose from bamboo fiber, through the isolation process. This study was carried out using the delignification method with NaOH solvent on temperature at 80 o C and the time variations of 30, 60, 90, 120, 180 minutes as the first stage of separation of alpha cellulose from other compounds contained in bamboo fiber. The results showed that the optimum condition of delignification time was 60 minutes with yield of 55.26%. The FTIR spectra was performed to confirm the formation of the product (alpha cellulose) proved by spectrum indicating the presence of the cellulose compound characterized by peak formation in 1641 cm -1 absorption area by comparing the cluster on the reaction alpha cellulose with the cluster on the bamboo fiber. XRD result showed that the crystalline portion of alpha cellulose was higher than amorf portion of alpha cellulose itself with the total amount of crystallinity index was 93.3%.
竹纤维(Bambuseae)含有纤维素，可作为复合材料的填料。本研究的目的是通过分离工艺从竹纤维中获得α纤维素。本研究采用NaOH溶剂脱木质素法，在温度为80℃，时间变化为30、60、90、120、180 min的条件下，对竹纤维中α纤维素和其他化合物进行了第一步分离。结果表明，脱木质素的最佳条件为60 min，得率为55.26%。通过对比反应α纤维素上的团簇与竹纤维上的团簇，用FTIR光谱证实了产物(α纤维素)的形成，表明在1641 cm -1吸收区存在以峰形成为特征的纤维素化合物。XRD结果表明，α -纤维素的结晶部分高于α -纤维素本身的非晶态部分，总结晶度指数为93.3%。
{"title":"The Effect of Delignification Time on % Yield of Alpha-cellulose from Bamboo Fiber (Bambuseae) Properties","authors":"J. Sitinjak, H. Nasution, M. Lubis","doi":"10.5220/0010138500002775","DOIUrl":"https://doi.org/10.5220/0010138500002775","url":null,"abstract":": Bamboo fiber (Bambuseae) has cellulose content that can be used as a filler in the composites. The objective of this study is to obtain alpha cellulose from bamboo fiber, through the isolation process. This study was carried out using the delignification method with NaOH solvent on temperature at 80 o C and the time variations of 30, 60, 90, 120, 180 minutes as the first stage of separation of alpha cellulose from other compounds contained in bamboo fiber. The results showed that the optimum condition of delignification time was 60 minutes with yield of 55.26%. The FTIR spectra was performed to confirm the formation of the product (alpha cellulose) proved by spectrum indicating the presence of the cellulose compound characterized by peak formation in 1641 cm -1 absorption area by comparing the cluster on the reaction alpha cellulose with the cluster on the bamboo fiber. XRD result showed that the crystalline portion of alpha cellulose was higher than amorf portion of alpha cellulose itself with the total amount of crystallinity index was 93.3%.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"3 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":"126379621","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}
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