Tommy Andreant, L. Afriani, O. T. Purwadi, Andius D. Saputra
{"title":"The seepage flow analysis of main dam stability in Way Sekampung dam development project","authors":"Tommy Andreant, L. Afriani, O. T. Purwadi, Andius D. Saputra","doi":"10.23960/josst.v1i1.1","DOIUrl":"https://doi.org/10.23960/josst.v1i1.1","url":null,"abstract":"Analysis using depression line method was conducted in two conditions, at normal water level (± 124 m) with a result of 1.11 × 10-3 m3/s and at flood water level ± 126.5 m with result 1.33 × 10-3 m3/s. Capacity shows (< 1%) the average enters the reservoir, making it safe from the danger of distress. Safety calculations for pipping showed a bigger value than the filtration flow speed indication at the average value of 4,638 ( > 4) which means that dam will not make pipping symptoms. Analysis conducted on the slope of the dam using slice method without entering the value of seismic coefficient obtained a safe number result in all loading conditions and the analysis by adding a seismic coefficient get a safe result except in two conditions, at elevation ± 126.5 m is SF 1.05 and at elevation ± 124 m SF is 1.05.","PeriodicalId":153391,"journal":{"name":"Journal of Sustainability Science and Technology","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121379685","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}
I. Sari, F. Yanti, Dian Imam Saefullah, B. Yunianto
{"title":"Identification of borax in meatballs at Ciroyom Market, Bandung City, Indonesia","authors":"I. Sari, F. Yanti, Dian Imam Saefullah, B. Yunianto","doi":"10.23960/josst.v1i1.8","DOIUrl":"https://doi.org/10.23960/josst.v1i1.8","url":null,"abstract":"Borax is a chemical substance that is prohibited from being used as a food additive because of its toxic nature. However, the use of borax is still widely found, one of which is meatballs the most. This study aims to identify the borax content in meatballs. Samples were taken from Ciroyom Market, Bandung City, Indonesia using total sampling and obtained as many as 10 samples of meatballs. The samples were analyzed qualitatively by observing physical conditions and testing using BaCl2 solution. Meanwhile, quantitative analysis was carried out using a UV-Vis spectrophotometer at a wavelength of 428 nm. The results of the analysis showed that all samples were indicated to contain borax. Even the quantitative test using UV-Vis spectrophotometer showed that the highest borax content was found in sample 10, which was 3.672,9 µg/ml.","PeriodicalId":153391,"journal":{"name":"Journal of Sustainability Science and Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115354690","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}