CHEMICA: Jurnal Teknik Kimia最新文献_第5页

One-Step Synthesis of Carbon Nitride Nanosheets for Photoremediation of Toxic Organic Dyes Waste in Aquatic Environment 一步法合成氮化碳纳米片光修复水生环境中有毒有机染料废水

CHEMICA: Jurnal Teknik Kimia Pub Date : 2021-02-01 DOI: 10.26555/CHEMICA.V7I2.18498

Huwaida Ikbar, Muhammad Hakim Muzakky, Harry Pramudya Rivelino, A. W. Budiman

引用次数: 0

Effect of Contact Time of Rice Husk Ash and Poly Aluminum Chloride to Reduce the Concentration of Rhodamin B Dyes Using the Adsorption-Fluidization Method 稻壳灰与聚合氯化铝接触时间对吸附流化法降低罗丹明B染料浓度的影响

CHEMICA: Jurnal Teknik Kimia Pub Date : 2020-07-08 DOI: 10.26555/CHEMICA.V7I1.16529

A. Sugiharto, Imam Hoyali, Ahmad Fadli Arya Ghifari, T. Nabilla

引用次数: 1

Modified Pumpkin Flour Using Hydrogen Rich Water with a Microwave Dryer 微波干燥机用富氢水改性南瓜粉

CHEMICA: Jurnal Teknik Kimia Pub Date : 2020-06-22 DOI: 10.26555/CHEMICA.V7I1.16230

G. Budiarti, Ayu Wulandari, Siti Mutmaina, E. Sulistiawati

引用次数: 2

Coal Fly Ash Characterization from Cement Industry “X” as an Initial Study in Its Utilization X水泥工业粉煤灰的表征及其利用的初步研究

CHEMICA: Jurnal Teknik Kimia Pub Date : 2020-06-22 DOI: 10.26555/CHEMICA.V7I1.16715

F. Hanum, A. Rahayu, Ulung Muhammad Sutopo, Z. Mufrodi

引用次数: 3

Perbedaan Aktivitas Antioksidan pada Minuman Tradisional Wedang Uwuh Original, Seduh, Celup, Instan dan Sirup 传统的Uwuh、酿造、染色、速溶和糖浆中抗氧化剂的活性差异

CHEMICA: Jurnal Teknik Kimia Pub Date : 2019-10-16 DOI: 10.26555/CHEMICA.V6I1.14061

Retnosyari Septiyani, Elok Rahmawati

{"title":"Perbedaan Aktivitas Antioksidan pada Minuman Tradisional Wedang Uwuh Original, Seduh, Celup, Instan dan Sirup","authors":"Retnosyari Septiyani, Elok Rahmawati","doi":"10.26555/CHEMICA.V6I1.14061","DOIUrl":"https://doi.org/10.26555/CHEMICA.V6I1.14061","url":null,"abstract":"Wedang uwuh as a distinctive traditional beverage from Imogiri Yogyakarta has been widely known to the wider community and even began to develop a lot like wedang uwuh in the form of the original herb, brewed, dipped, instant and syrup. However, research on wedang uwuh is still very limited. Therefore this study aims to conduct a proximate analysis test on the original wedang uwuh, brewed, dipped, instant and syrup so that the chemical content is known and to test antioxidant activity so that it can provide information to the public about the types of variants of wedang uwuh which has the best antioxidant activity. Antioxidants are important for our health. The importance of antioxidants for maintaining the physiological functions of the vital organ in our body. Based on the results of proximate testing, wedang uwuh brewed and dipped have lower energy compared to wedang uwuh original, instant, and syrup. Testing of antioxidant activity using DPPH and IC50 methods showed that the brewed water had the highest antioxidant activity value compared to the original, dip, instant and syrup variants with an IC50 value of 9195.40 ppm. Factors that influence the difference in antioxidant activity in the original, brewed, instant and syrup include mechanical treatment, heat treatment, exposure to light, and packaging used during storage.","PeriodicalId":118085,"journal":{"name":"CHEMICA: Jurnal Teknik Kimia","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128232004","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: 3

Validasi Metoda Analisa Kadar Logam Pb pada Rambut Karyawan SPBU jln. Juanda Kota Padang 方法达分析Pb的头发中Pb的金属含量。贾达巴东

CHEMICA: Jurnal Teknik Kimia Pub Date : 2019-10-08 DOI: 10.26555/CHEMICA.V6I1.13347

Dyna Putri Mayaserli, Retnowati Retnowati

引用次数: 0

Pengaruh Komposisi Gypsum Terhadap Setting Time Pada Proses Produksi Semen PCC 石膏组成对PCC水泥生产时间的影响

CHEMICA: Jurnal Teknik Kimia Pub Date : 2019-10-07 DOI: 10.26555/chemica.v6i1.13804

M. H. Nasution, Nevybryanti Bunga Nurcahyo Putri, Lukmilayani Candra

{"title":"Pengaruh Komposisi Gypsum Terhadap Setting Time Pada Proses Produksi Semen PCC","authors":"M. H. Nasution, Nevybryanti Bunga Nurcahyo Putri, Lukmilayani Candra","doi":"10.26555/chemica.v6i1.13804","DOIUrl":"https://doi.org/10.26555/chemica.v6i1.13804","url":null,"abstract":"Cement is a national strategic commodity. Based on data from the Ministry of Industry of the Republic of Indonesia in 2017, the total installed capacity of the national cement industry is 92.7 million tons per year with a consumption rate of 65 million tons per year. The raw materials for the cement production process are limestone, iron sand, clay, silica sand, and gypsum. A comparison of the composition of each raw material influences the type and characteristics of the cement produced. Gypsum is a raw material that affects the quality of the final cement product. Gypsum acts to regulate the hardening time and inhibits the binding time so that it can be used for a long time. This research was conducted to study the effect of gypsum composition on setting time in the Portland Composite Cement (PCC) production process. Gypsum was Tanjung Jati gypsum. Variation of gypsum composition were 0-5% -weight. Based on SNI 15-2049-2004, the minimum initial setting time is 45 minutes and the maximum final setting time is 375 minutes. Based on the results of the research, PCC cement with 0 - 5%--weight gypsum met these standards. Increased gypsum composition causes an increase in both initial and final setting time.","PeriodicalId":118085,"journal":{"name":"CHEMICA: Jurnal Teknik Kimia","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125255684","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

Biodegradable Plastic from Cassava and Organic Acid as a Synthetic Plastic Replacement 木薯和有机酸作为合成塑料替代品的可生物降解塑料

CHEMICA: Jurnal Teknik Kimia Pub Date : 2019-10-02 DOI: 10.26555/CHEMICA.V6I1.13721

A. Pangestu, Raifa Tryas Shara, Z. Mufrodi

{"title":"Biodegradable Plastic from Cassava and Organic Acid as a Synthetic Plastic Replacement","authors":"A. Pangestu, Raifa Tryas Shara, Z. Mufrodi","doi":"10.26555/CHEMICA.V6I1.13721","DOIUrl":"https://doi.org/10.26555/CHEMICA.V6I1.13721","url":null,"abstract":"Currently plastic has been widely used for various purposes of packaging food and beverages. The use of synthetic plastic is increasingly then become a waste that cannot be degraded and pollute the environment. In Southeast Asia generates 379.198 million tons of plastic waste per year, meanwhile, Indonesia became the first contributor to the largest plastic waste producer which is 187.2 million tons per year. Biodegradable plastic can be an alternative the eco-friendly and easily degraded packaging materials as one way to replaced synthetic plastic. Cassava flour could utilized to make biodegradable plastic with cassava starch content reach 81.6 %. The addition of sorbitol plasticizer is as a giver of elastic properties to the material and chitosan as an amplifier and antimicrobial. The variation of weight ratio in gram that used is organic acids 50(1), 60(2), and 70(3). The variation of sorbitol are 3(A), 6(B), and 9(C). The variation of chitosan are 1(i), 3(ii), and 5(iii). The organic acids used are apple vinegar and rice vinegar with 2% acetic acid as a comparison. The research procedure begins with making cassava starch, making a film of biodegradable plastic, and sample testing. The film of biodegradable plastic has performed by tensile strength test analysis, elongation at break test, and biodegradable test. The results showed that the highest of percent biodegradable is on 2Ci with the results is 64.58%. The best of mechanical properties reached by using apple vinegar with the results of tensile strength is 105.98 kg/cm2 and elongation at break is 129.91%.","PeriodicalId":118085,"journal":{"name":"CHEMICA: Jurnal Teknik Kimia","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133106067","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

Ekstrak Daun Pisang Klutuk (Musa balbisiana Colla) sebagai Bahan Tambahan pada Pembuatan Kemasan Aktif berbasis Methyl Cellulose

CHEMICA: Jurnal Teknik Kimia Pub Date : 2019-09-20 DOI: 10.26555/CHEMICA.V6I1.13724

Safinta Nurindra Rahmadhia, U. Santoso, S. Supriyadi

{"title":"Ekstrak Daun Pisang Klutuk (Musa balbisiana Colla) sebagai Bahan Tambahan pada Pembuatan Kemasan Aktif berbasis Methyl Cellulose","authors":"Safinta Nurindra Rahmadhia, U. Santoso, S. Supriyadi","doi":"10.26555/CHEMICA.V6I1.13724","DOIUrl":"https://doi.org/10.26555/CHEMICA.V6I1.13724","url":null,"abstract":"The packaging is important in our life. Banana leaf is one of the traditional packaging materials that is widely used because it has wide leaves and is not easily torn. However, traditional packaging has been abandoned by many people, so active packaging needs to be developed that has an advantage of modern and traditional packaging. In this study the active packaging was made based on methylcellulose (MC) which is added by klutuk banana leaf extract (EDPK) and glutaraldehyde (GA). EDPK studied its antioxidant properties and the active packaging was studied for its physical properties. Klutuk banana leaves dried using a cabinet dryer then mashed up and extracted by maceration method using 80% methanol and concentrated with a rotary vacuum evaporator. Then the extract was analyzed for its antioxidant properties. The active packaging/film prepared by casting with the addition of EDPK as an antioxidant and (GA) as a crosslinker agent. EDPK has antioxidant activity 33,17 ± 0,84 %RSA, total phenolic 76,58 ± 7,95 mg GAE/g EDPK and total flavonoids 29.52 ± 4.01 mg QE/g EDPK. The thickness of EDPK films ranged from 0,062-0,080 mm. The FTIR spectrum of EDPK films shows a relatively similar profile in all film formulations.","PeriodicalId":118085,"journal":{"name":"CHEMICA: Jurnal Teknik Kimia","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127819174","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: 1

Karakteristik Fisiko-Kimia Tepung Ubi Jalar Ungu dengan Proses Perendaman Menggunakan Asam Sitrat 紫甘薯粉的物理化学特性与柠檬酸浸泡过程

CHEMICA: Jurnal Teknik Kimia Pub Date : 2019-09-05 DOI: 10.26555/chemica.v6i1.12061

I. Santosa, Acnes Meyta Puspa, Delvi Aristianingsih, Endah Sulistiawati

引用次数: 2