Pub Date : 1900-01-01DOI: 10.5220/0010133300002775
Reno Permatasari Pasaribu, E. Zaidar, Rumondang Bulan
: Research about isolation and identification of LAB from goat milk kefir and coconut milk kefir has been completed. The making of goat milk kefir was used 3% kefir granule (HK) and 5% kefir granule (KK) from total volume of goat milk. As well as coconut milk kefir was used 3% kefir granule (HS) and 5% kefir granule (KS) from total volume of coconut milk. The kefir beverage, conducted quality analysis with result pH 4.2% – 4.6%, water content 89.5% (HK), 89.1% (KK), 79.2% (HS) and 78.9% (KS). Protein content 3.3% (HK), 3.1% (KK), 1.7% (HS) and 1.6% (KS), fat content 3.58% (HK), 15.2% (HS), 3.61% (KK), dan 15.8% (KS), ash content 0.79% (HK), 0.54% (HS), 0.81% (KK) and 0.9% (KS). Antibacterial test was conducted by observing the clear zone for 48 hours. Using Escherichia coli and Staphylococcus aureus as the test bacteria, resulted that sample HK showed the highest level of resistance compare to other samples. Total plate count of LAB showed that sample KK has the highest number of LAB counts for 1.7 x 10 8 . Morphology characterization of those colony are round shape, convex elevation, off-white and also gram positive bacteria with six isolate rod shape cell, and two isolate coccus shape cell. The catalase and oxidase test showed that all isolate are negative catalase and negative oxidase.
{"title":"Isolation and Characterization of Lactic Acid Bacteria from Goat Milk Kefir and Coconut Milk Kefir","authors":"Reno Permatasari Pasaribu, E. Zaidar, Rumondang Bulan","doi":"10.5220/0010133300002775","DOIUrl":"https://doi.org/10.5220/0010133300002775","url":null,"abstract":": Research about isolation and identification of LAB from goat milk kefir and coconut milk kefir has been completed. The making of goat milk kefir was used 3% kefir granule (HK) and 5% kefir granule (KK) from total volume of goat milk. As well as coconut milk kefir was used 3% kefir granule (HS) and 5% kefir granule (KS) from total volume of coconut milk. The kefir beverage, conducted quality analysis with result pH 4.2% – 4.6%, water content 89.5% (HK), 89.1% (KK), 79.2% (HS) and 78.9% (KS). Protein content 3.3% (HK), 3.1% (KK), 1.7% (HS) and 1.6% (KS), fat content 3.58% (HK), 15.2% (HS), 3.61% (KK), dan 15.8% (KS), ash content 0.79% (HK), 0.54% (HS), 0.81% (KK) and 0.9% (KS). Antibacterial test was conducted by observing the clear zone for 48 hours. Using Escherichia coli and Staphylococcus aureus as the test bacteria, resulted that sample HK showed the highest level of resistance compare to other samples. Total plate count of LAB showed that sample KK has the highest number of LAB counts for 1.7 x 10 8 . Morphology characterization of those colony are round shape, convex elevation, off-white and also gram positive bacteria with six isolate rod shape cell, and two isolate coccus shape cell. The catalase and oxidase test showed that all isolate are negative catalase and negative oxidase.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"28 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":"115436192","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: 10.5220/0010139300002775
Ivan Anggia Sitohang, K. Tarigan, S. Humaidi
: Supercapacitors or known as EDLCs (Electrochemically double-layer Capacitors) are electric double layers separated by separators. Supercapacitors provide very high power density values, long repetition cycles and have a higher repetition efficiency compared to batteries. This study aims to design a supercapacitor with a material of 0.905 gram graphene powder, 2 gram activated carbon, epoxy resin (3 spoonfuls of spatula), Phosphoric Acid (H 3 PO 4 ) electrolyte solution, and aluminum plate with a size of 8 cm x 8 cm, 6 cm x 6 cm, and 5 cm x 5 cm as collector media. The research was carried out in four stages, namely mixing graphene powder and epoxy resin, coating graphene-epoxy resin powder on both plates, sowing activated carbon on the surface of the plate, and combining the two plates into one supercapacitor section. The test results show that with the charging-discharging method, the size of 8 cm x 8 cm which is carried out charging for 3 minutes can store a voltage of 1.65 Volt, on the size of 6 cm x 6 cm done charging for 3 minutes can store a voltage of 1.44 Volt, and at a size of 5 cm x 5 cm by charging for 3 minutes can store a voltage of 1.05 Volt. So it can be proven that the cross-sectional area of a supercapacitor greatly influences the value of the stored voltage.
超级电容器或称为edlc(电化学双层电容器)是由分离器分开的双层电。与电池相比，超级电容器提供非常高的功率密度值，长重复周期和更高的重复效率。本研究以0.905克石墨烯粉末、2克活性炭、环氧树脂(3勺抹刀)、磷酸(h3po 4)电解质溶液、尺寸分别为8 cm × 8 cm、6 cm × 6 cm、5 cm × 5 cm的铝板为捕集介质，设计超级电容器。研究分四个阶段进行，分别是石墨烯粉末与环氧树脂混合，在两个板上涂覆石墨烯-环氧树脂粉末，在板表面播种活性炭，将两个板组合成一个超级电容器截面。试验结果表明，采用充放电方法，在8cm × 8cm的尺寸上进行充电3分钟可存储1.65伏的电压，在6cm × 6cm的尺寸上进行充电3分钟可存储1.44伏的电压，在5cm × 5cm的尺寸上进行充电3分钟可存储1.05伏的电压。因此可以证明，超级电容器的横截面积对存储电压的值有很大的影响。
{"title":"Manufacture and Measurement of Graphene-based Supercapasitor Electrodes and Characterization using Charging-discharging Method","authors":"Ivan Anggia Sitohang, K. Tarigan, S. Humaidi","doi":"10.5220/0010139300002775","DOIUrl":"https://doi.org/10.5220/0010139300002775","url":null,"abstract":": Supercapacitors or known as EDLCs (Electrochemically double-layer Capacitors) are electric double layers separated by separators. Supercapacitors provide very high power density values, long repetition cycles and have a higher repetition efficiency compared to batteries. This study aims to design a supercapacitor with a material of 0.905 gram graphene powder, 2 gram activated carbon, epoxy resin (3 spoonfuls of spatula), Phosphoric Acid (H 3 PO 4 ) electrolyte solution, and aluminum plate with a size of 8 cm x 8 cm, 6 cm x 6 cm, and 5 cm x 5 cm as collector media. The research was carried out in four stages, namely mixing graphene powder and epoxy resin, coating graphene-epoxy resin powder on both plates, sowing activated carbon on the surface of the plate, and combining the two plates into one supercapacitor section. The test results show that with the charging-discharging method, the size of 8 cm x 8 cm which is carried out charging for 3 minutes can store a voltage of 1.65 Volt, on the size of 6 cm x 6 cm done charging for 3 minutes can store a voltage of 1.44 Volt, and at a size of 5 cm x 5 cm by charging for 3 minutes can store a voltage of 1.05 Volt. So it can be proven that the cross-sectional area of a supercapacitor greatly influences the value of the stored voltage.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"45 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":"127740948","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: 10.5220/0010139400002775
Nurhafiz Ahmad Rangkuti, K. Tarigan, S. Humaidi
{"title":"The Effect of Giving High Voltage to the Concentration of Free Fatty Acids in Crude Palm Oil (CPO)","authors":"Nurhafiz Ahmad Rangkuti, K. Tarigan, S. Humaidi","doi":"10.5220/0010139400002775","DOIUrl":"https://doi.org/10.5220/0010139400002775","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":"131226791","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: 10.5220/0010182500002775
S. Z. Nasution, Muhammad Ridha Haykal Amal, R. A. Ariga, C. T. Siregar, W. D. Purba, Muhammad Taufik
: The family is an important factor in providing support to all family members, especially for working wives. Family support will increase self-confidence and increase motivation for all family members in undergoing all activities. The purpose of this study was to identify family support for wives working in Medan Indonesia. In this study using a descriptive design with a study population that is a wife who works in Medan and the number of research samples are 180 samples with probability sampling method with cluster sampling type. The results showed that family support in the aspect of appreciation in the good category, emotional support in the good category, information support in the sufficient category, and instrumental support in the good category. This research is expected to be an initial reference material to conduct further research related to family support for working wives.
{"title":"Family Support Perceived by Working Wives in Medan, Indonesia","authors":"S. Z. Nasution, Muhammad Ridha Haykal Amal, R. A. Ariga, C. T. Siregar, W. D. Purba, Muhammad Taufik","doi":"10.5220/0010182500002775","DOIUrl":"https://doi.org/10.5220/0010182500002775","url":null,"abstract":": The family is an important factor in providing support to all family members, especially for working wives. Family support will increase self-confidence and increase motivation for all family members in undergoing all activities. The purpose of this study was to identify family support for wives working in Medan Indonesia. In this study using a descriptive design with a study population that is a wife who works in Medan and the number of research samples are 180 samples with probability sampling method with cluster sampling type. The results showed that family support in the aspect of appreciation in the good category, emotional support in the good category, information support in the sufficient category, and instrumental support in the good category. This research is expected to be an initial reference material to conduct further research related to family support for working wives.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"15 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":"133101160","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: 10.5220/0010614800002775
M. Razali, Muhammad Taufik, Evi Dayatul Atiqah, Rid Wanto, A. Daulay, D. Ardilla, E. Susilawati, .. Afniwati
{"title":"Relationship of Tobacco Weight in Commercial Cigarettes to Nicotine Levels","authors":"M. Razali, Muhammad Taufik, Evi Dayatul Atiqah, Rid Wanto, A. Daulay, D. Ardilla, E. Susilawati, .. Afniwati","doi":"10.5220/0010614800002775","DOIUrl":"https://doi.org/10.5220/0010614800002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"692 25","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133970272","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: 10.5220/0010210300002775
.. Novitrian, K. Basar, Roby Dany Riupassa
: Natural circulation in nuclear reactor cooling systems can be modeled based on computational fluid dynamics (CFD). Modeling is done to study the fluid flow in a closed loop system that occurs due to differences in fluid density. The closed loop system model is fitted with a heater and cooler on the opposite side. Because the density of the fluid depends on the temperature, then by adjusting the temperature difference between the heater and the cooler it can produce a fluid flow that occurs naturally. The initial condition in this study uses water as a working fluid with flow properties that are laminar and incompressible. Variations in temperature differences between heaters and coolers are done to get the temperature distribution and fluid flow velocity. The model is built for time-dependent conditions so that the time needed to transfer heat in a closed loop system can be known. Variations in temperature differences between heaters and coolers are carried out until the maximum conditions of water temperature to remain in the liquid phase. For this condition the maximum temperature is set to 80 C. This research was also developed by using several other types of fluids to determine the effect of density on fluid flow velocity. Other fluids used are gasoline, liquid helium, liquid sodium, and liquid mercury. The height of the closed loop system at the beginning of this study was used by three meters which then varied for heights of up to five and eight meters. Model testing is also carried out for working temperatures with differences between heaters and coolers above 80 C.
{"title":"Heat Transfer Mechanism by Natural Circulation for Cooling Material in Nuclear Reactors as a Passive Safety System","authors":".. Novitrian, K. Basar, Roby Dany Riupassa","doi":"10.5220/0010210300002775","DOIUrl":"https://doi.org/10.5220/0010210300002775","url":null,"abstract":": Natural circulation in nuclear reactor cooling systems can be modeled based on computational fluid dynamics (CFD). Modeling is done to study the fluid flow in a closed loop system that occurs due to differences in fluid density. The closed loop system model is fitted with a heater and cooler on the opposite side. Because the density of the fluid depends on the temperature, then by adjusting the temperature difference between the heater and the cooler it can produce a fluid flow that occurs naturally. The initial condition in this study uses water as a working fluid with flow properties that are laminar and incompressible. Variations in temperature differences between heaters and coolers are done to get the temperature distribution and fluid flow velocity. The model is built for time-dependent conditions so that the time needed to transfer heat in a closed loop system can be known. Variations in temperature differences between heaters and coolers are carried out until the maximum conditions of water temperature to remain in the liquid phase. For this condition the maximum temperature is set to 80 C. This research was also developed by using several other types of fluids to determine the effect of density on fluid flow velocity. Other fluids used are gasoline, liquid helium, liquid sodium, and liquid mercury. The height of the closed loop system at the beginning of this study was used by three meters which then varied for heights of up to five and eight meters. Model testing is also carried out for working temperatures with differences between heaters and coolers above 80 C.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"351 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":"134464142","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: 10.5220/0010614000002775
.. Dellansyah, S. Gea, .. Andriayani, M. Harahap, Grace Nainggolan
{"title":"Optical Study of Graphene Quantum Dots from Sawahlunto Coal Graphite","authors":".. Dellansyah, S. Gea, .. Andriayani, M. Harahap, Grace Nainggolan","doi":"10.5220/0010614000002775","DOIUrl":"https://doi.org/10.5220/0010614000002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"38 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":"123744752","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: 10.5220/0009876400002775
D. O. Haryeni, E. Baskoro
: The characterization study of all graphs with partition dimension either 2, 𝑛 − 2, 𝑛 − 1 or 𝑛 has been completely done. In the case of locating-chromatic numbers, the efforts in characterizing all graphs with locating-chromatic number either 2, 3, 𝑛 − 1 or 𝑛 have reached to complete results. In this paper we present methods to obtain a family of graphs having partition dimension 3 or locating-chromatic number 4 by using the previous known results.
{"title":"Graphs with Partition Dimension 3 and Locating-chromatic Number 4","authors":"D. O. Haryeni, E. Baskoro","doi":"10.5220/0009876400002775","DOIUrl":"https://doi.org/10.5220/0009876400002775","url":null,"abstract":": The characterization study of all graphs with partition dimension either 2, 𝑛 − 2, 𝑛 − 1 or 𝑛 has been completely done. In the case of locating-chromatic numbers, the efforts in characterizing all graphs with locating-chromatic number either 2, 3, 𝑛 − 1 or 𝑛 have reached to complete results. In this paper we present methods to obtain a family of graphs having partition dimension 3 or locating-chromatic number 4 by using the previous known results.","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"87 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":"124801762","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: 10.5220/0010142500002775
Khatarina Meldawati Pasaribu, S. Gea, .. Tamrin, S. Ilyas, I. Mahendra, Appealwan Altruistis Sarumaha
{"title":"Enlarge Bacterial Cellulose Pore by Adding Aloe Vera Extract as Potential Material for Skin Tissue Engineering Khatarina","authors":"Khatarina Meldawati Pasaribu, S. Gea, .. Tamrin, S. Ilyas, I. Mahendra, Appealwan Altruistis Sarumaha","doi":"10.5220/0010142500002775","DOIUrl":"https://doi.org/10.5220/0010142500002775","url":null,"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":"117055738","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: 10.5220/0010199300002775
Ririn Puspita, H. Wahyuningsih
{"title":"Fish Diversity in Peusangan River, Aceh Tengah Regency, Indonesia","authors":"Ririn Puspita, H. Wahyuningsih","doi":"10.5220/0010199300002775","DOIUrl":"https://doi.org/10.5220/0010199300002775","url":null,"abstract":"","PeriodicalId":257157,"journal":{"name":"Proceedings of the 1st International MIPAnet Conference on Science and Mathematics","volume":"111 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":"123440729","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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