Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)最新文献_第2页

Tannin determination in young coconut coir (Cocos nucifera L.) by FTIR and UV-Vis spectroscopy FTIR和UV-Vis光谱法测定幼椰子中单宁的含量

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2023-03-30 DOI: 10.54076/jumpa.v3i1.271

Yelfira Sari

{"title":"Tannin determination in young coconut coir (Cocos nucifera L.) by FTIR and UV-Vis spectroscopy","authors":"Yelfira Sari","doi":"10.54076/jumpa.v3i1.271","DOIUrl":"https://doi.org/10.54076/jumpa.v3i1.271","url":null,"abstract":"The coir of young coconut is the largest by product of coconut. Young coconut coir has no important industrial uses and until now has been incinerated or dumped without control. This is because the utilization of young coconut coir is not easy as the old one. Tannin has pharmacological activities including anti-inflammatory, antioxidant, anti-tumor This study aims to determine tannin in young coconut coir (Cocos nucifera L.) using a complementary analytical technique, Fourier Transform Infra-RedFTIR) and Ultraviolet-Visible (UV-Vis) spectroscopy. Sample of young coconut coir was obtained from the waste of bargainer at the local market. Sample was maserated using ethanol as the solvent and then was evaporated to get concentrated extract. The FTIR and UV-Vis spectra showed that the sample was indicated to contain tannin. The presence of tannin was indicated by appearance of peak at 283 nm and 326 nm in UV-Vis spectra and in the region between 1610-1445 cm-1 by FTIR. This research is an early stage in the characterization of tannin compounds from young coconut coir extract. It is expected that waste have economic value in the future.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90186022","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

Isolation and Identification of Secondary Metabolic Compounds Acetone Extract from Dutch Eggplant (Cyphomandra betacea) 荷兰茄子(Cyphomandra betacea)次生代谢化合物丙酮提取物的分离鉴定

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-09-26 DOI: 10.54076/jumpa.v2i2.230

M. Mawardi

引用次数: 0

Determination of Protein Content by Spectrophotometric Method and Fat Content by Soxhletation Method on Purple Kopek Eggplant and Green Kopek Eggplant 紫外分光光度法测定紫Kopek茄子和绿Kopek茄子的蛋白质含量和索氏法测定脂肪含量

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-09-26 DOI: 10.54076/jumpa.v2i2.229

Kartika Hasan

{"title":"Determination of Protein Content by Spectrophotometric Method and Fat Content by Soxhletation Method on Purple Kopek Eggplant and Green Kopek Eggplant","authors":"Kartika Hasan","doi":"10.54076/jumpa.v2i2.229","DOIUrl":"https://doi.org/10.54076/jumpa.v2i2.229","url":null,"abstract":"The type of research is quantitative research which is concerned with determining how much certain substances are contained in a sample. The formulation of the problem in this study is how much protein and fat levels are contained in the green kopek green eggplant kopeksangegg plant. The study was conducted to determine how many grams of protein and fat content in purple kopek eggplant and green kopek eggplant samples. With a spectrophotometric method (Lowry) for the determination of protein content and one method of hot extraction is the soxhletation method for the determination of fat content. The results showed that the protein content in 50 g of eggplant purple kopek was 0.0323 g and 50 g eggplant green kopek was 0.0375 g. The fat content in 10 grams of eggplant purple kopek is 0.1794% and 10 grams of eggplant green kopek is 0.1612%. Based on the results of the research that has been carried out, it was found that the protein content of eggplant kopek did not meet the DKBM standard, namely 1.4-2 g in a sample of 100 g. While the standard fat content obtained by DKBM is 1.1 g in a sample of 100 g.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78245825","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

Corncob Activated Carbon Adsorption Capacity (Zea mays L.) Against Rhodamine B. Dyes 玉米芯活性炭吸附量(Zea mays L.)对罗丹明b染料

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-09-26 DOI: 10.54076/jumpa.v2i2.231

Sudarmi Sudarmi

引用次数: 0

Design of a Light Intensity Regulator with Remote Control for Incandescent Lamps 白炽灯遥控光强调节器的设计

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-09-26 DOI: 10.54076/jumpa.v2i2.227

A. Yani

引用次数: 0

Design of a Light Intensity Regulator with Remote Control for Incandescent Lamps 白炽灯遥控光强调节器的设计

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-09-26 DOI: 10.54076/jumpa.v2i2.228

Januar Januar

引用次数: 0

The Signage Placement Directions On The Pedestarian Path, Iskandar Muda Road, Medan City 棉兰市依斯干达慕达路行人路指示牌放置指引

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-09-05 DOI: 10.54076/jumpa.v2i1.224

Hibnul Walid, Indra Kesuma Hadi, Muhammad Amin, Surta Ria Nurliana Panjaitan, Rizky Franchitika

{"title":"The Signage Placement Directions On The Pedestarian Path, Iskandar Muda Road, Medan City","authors":"Hibnul Walid, Indra Kesuma Hadi, Muhammad Amin, Surta Ria Nurliana Panjaitan, Rizky Franchitika","doi":"10.54076/jumpa.v2i1.224","DOIUrl":"https://doi.org/10.54076/jumpa.v2i1.224","url":null,"abstract":"The city of Medan as the capital city of North Sumatra Province has made significant progress. This coTechnology and Computer Sciencemmercial buildings in several places, one of which was in the Jalan Iskandar Muda corridor. In general, these buildings are spread along road corridors that function as commercial areas in the city of Medan. Presence signage on Jalan Iskandar Muda, Medan City, it turns out that they tend to maximize the economic potential of the region, resulting in a shift in the function of urban space into a space for advertising media expression. As an effort to create city comfort that supports visual aesthetics and does not interfere with pedestrian comfort, this research produces a design concept in the form of placement signage according to the designated zone, namely in the pedestrian zone, the design of the height proportion signage to the width of the pedestrian path using a human scale approach, panel or plane dimension design signage by using the concept golden section, as well as setting the point of placement or spread signage using the concept of rhythm and local regulations that have been established with the aim of limiting the number of signage on the pedestrian path.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":"83 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84020631","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

Manufacturing of Ceramic Reinforced Metal Matrix Composites (Al/Sicp) And Their Characterization Through Powder Metallurgy Methods 陶瓷增强金属基复合材料(Al/Sicp)的制备及其粉末冶金表征

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-05-19 DOI: 10.54076/jumpa.v2i1.209

Jepriandi Ginting

{"title":"Manufacturing of Ceramic Reinforced Metal Matrix Composites (Al/Sicp) And Their Characterization Through Powder Metallurgy Methods","authors":"Jepriandi Ginting","doi":"10.54076/jumpa.v2i1.209","DOIUrl":"https://doi.org/10.54076/jumpa.v2i1.209","url":null,"abstract":"Metal Matrix Composites is two or more combination material with aluminum metal as matrix and devolved to fix metal act, strength, high temperature stability and hardness. Metal matrix composites have been developed so many because it has low density, corrosion proof, cheap and easy fabrication. Powder metallurgy technique is one of metal matrix composites fabrication process in solid state that is still developed because more economic, doesn't need difficult equipment. Aluminum that use in this research is Al alloy type 2124. Metal matrix composites fabrication process with powder metallurgy method using wet mixing with pure ethanol, cold compaction 300 MPa and inert gas atmospheric using Nitrogen gas (N2) at sintering process. Variation of sinter temperature that used is 450, 500, 550, and 600 oC with highly temperature average 5 oC/min and holding time for 1 hour and with speed flow Nitrogen gas (N2) 5 lt/min with pressure 1000 kgf/cm2. From research result can be concluded the mechanical properties and physical properties from metal matrix composites reinforced ceramics Al/SiCp increase with sinter temperature highly and with reinforcement particle addition SiC can increase mechanical properties and physical properties such as: hardness, wear resistance, coefficient of thermal expansion and corrosion resistance. From microstructure analysis, particle Sic distributed homogeneously at test specimen based on SEM analysis, and structure crystal analysis test result XRD show that dominant phase appear is Al, and Sic.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82868695","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 Effect of Addition of Ash from Burning Wood Powder to the Mechanical and Physical Properties of Concrete 燃烧木粉灰分掺加对混凝土力学物理性能的影响

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-03-01 DOI: 10.54076/jumpa.v2i1.208

Yusnitaerna Erna

引用次数: 0

ISOLATION AND NODULATION TEST OF Rhizobium sp. FROM Pueraria javanica (Benth.) Benth. AND LIABILITY TEST ON THE CARRIER MEDIUM OF PEAT AND COMPOST FROM PALM OIL PALM EMPTY FRUITS 土葛根瘤菌的分离与结瘤试验Benth。并对棕榈空果中泥炭和堆肥的载体介质进行了负荷试验

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) Pub Date : 2022-03-01 DOI: 10.54076/jumpa.v2i1.205

Agnes Siska Situmorang

引用次数: 0