Pub Date : 1900-01-01DOI: 10.5220/0010137100002775
A. Nuryawan, I. Risnasari, Hana Pratiwi Sihombing, D. Situmorang
: The objective of this study was to evaluate production and properties of liquefied oil-palm stem adhesive. Method for production of this adhesive was inspired by bio-refinery concept. In this context, vascular bundle of oil-palm stem was liquefied through liquefaction process involving thermo-chemical reaction using chemicals of H 2 SO 4 , phenol, and NaOH at 90 C. Properties of the adhesive were compared to Indonesian Standard for phenol-formaldehyde (PF) resins. Results of the examinations showed color of the liquefied adhesive was brown-blackish, specific gravity was 1.26, solid content was 86%, viscosity was 111 cP, pH was 7.8, gel time was 98 minutes, and free formaldehyde was not detected. Even though the properties of the liquefied adhesive made of vascular bundles’ oil-palm stem were slightly differ from PF resin, application of this adhesive as binder of wood product should be recommended because of its feasibility as the adhesive.
{"title":"Production and Properties of Liquefied Oil-palm Stem Adhesive","authors":"A. Nuryawan, I. Risnasari, Hana Pratiwi Sihombing, D. Situmorang","doi":"10.5220/0010137100002775","DOIUrl":"https://doi.org/10.5220/0010137100002775","url":null,"abstract":": The objective of this study was to evaluate production and properties of liquefied oil-palm stem adhesive. Method for production of this adhesive was inspired by bio-refinery concept. In this context, vascular bundle of oil-palm stem was liquefied through liquefaction process involving thermo-chemical reaction using chemicals of H 2 SO 4 , phenol, and NaOH at 90 C. Properties of the adhesive were compared to Indonesian Standard for phenol-formaldehyde (PF) resins. Results of the examinations showed color of the liquefied adhesive was brown-blackish, specific gravity was 1.26, solid content was 86%, viscosity was 111 cP, pH was 7.8, gel time was 98 minutes, and free formaldehyde was not detected. Even though the properties of the liquefied adhesive made of vascular bundles’ oil-palm stem were slightly differ from PF resin, application of this adhesive as binder of wood product should be recommended because of its feasibility as the adhesive.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"7 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":"129177329","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: 10.5220/0010199600002775
B. N. L. Gultom, K. Nurtjahja, A. Bungsu, J. Simanullang, J. E. Silalahi, .. Riyanto
{"title":"Enumeration of Fungal Population Isolated from Dried-stored Spices at Retailers in Traditional Markets in Medan, North Sumatera","authors":"B. N. L. Gultom, K. Nurtjahja, A. Bungsu, J. Simanullang, J. E. Silalahi, .. Riyanto","doi":"10.5220/0010199600002775","DOIUrl":"https://doi.org/10.5220/0010199600002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"26 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":"116788191","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: 10.5220/0010152000002775
A. Warman, H. Nainggolan, M. Harahap, .. Dellyansyah, Grace Nainggolan, Suhut Alexander Situmorang, S. Gea
{"title":"Morphological Investigation of Electrospun Nanofibers Cellulose Acetate-based Membrane","authors":"A. Warman, H. Nainggolan, M. Harahap, .. Dellyansyah, Grace Nainggolan, Suhut Alexander Situmorang, S. Gea","doi":"10.5220/0010152000002775","DOIUrl":"https://doi.org/10.5220/0010152000002775","url":null,"abstract":"","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":"117022140","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: 10.5220/0010199500002775
I. Nurwahyuni, R. Sinaga, M. Situmorang
{"title":"Selection of Good Quality Mother Plant to be Used as Sources of Explants for in Vitro Propagation of Sumatra Benzoin (Styrax benzoin Dryander)","authors":"I. Nurwahyuni, R. Sinaga, M. Situmorang","doi":"10.5220/0010199500002775","DOIUrl":"https://doi.org/10.5220/0010199500002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"30 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":"132580878","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: 10.5220/0010199800002775
M. Zulham, Efendi Sinaga, C. F. Zuhra, E. Zaidar, F. Sebayang, Rumondang Bulan, Dea Rahmadana
: One of the favorite fruits in Medan-Indonesia is durian. The number of fruit is comparable to the most waste of durian seed produced. Seeds are one of the ways to breed through the process of germination. In the process of germination which plays an important role is the enzyme amylase. Based on this, the research aims to isolate the enzyme amylase found in durian seed sprouts on the fifth day through dialysis with ammonium sulfate and then determined its activity against temperature, pH, substrate concentration. Through this research, the enzyme amylase has been isolated from the sprouts of durian beans with the best activity at temperature 40 oC (36.87 U/ml), pH 7 (36.86 U/ml), substrate concentration 1% (26.36 U/ml). The best ammonium sulfate saturation in the dialysis process is 60% acquired enzyme activity of 58.59 U/ml.
{"title":"Isolation and Determination of Amylase Enzyme Activity from Durian Seed Sprouts","authors":"M. Zulham, Efendi Sinaga, C. F. Zuhra, E. Zaidar, F. Sebayang, Rumondang Bulan, Dea Rahmadana","doi":"10.5220/0010199800002775","DOIUrl":"https://doi.org/10.5220/0010199800002775","url":null,"abstract":": One of the favorite fruits in Medan-Indonesia is durian. The number of fruit is comparable to the most waste of durian seed produced. Seeds are one of the ways to breed through the process of germination. In the process of germination which plays an important role is the enzyme amylase. Based on this, the research aims to isolate the enzyme amylase found in durian seed sprouts on the fifth day through dialysis with ammonium sulfate and then determined its activity against temperature, pH, substrate concentration. Through this research, the enzyme amylase has been isolated from the sprouts of durian beans with the best activity at temperature 40 oC (36.87 U/ml), pH 7 (36.86 U/ml), substrate concentration 1% (26.36 U/ml). The best ammonium sulfate saturation in the dialysis process is 60% acquired enzyme activity of 58.59 U/ml.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"56 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":"133711794","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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