Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Jurnal Jejaring Matematika dan Sains Jurnal Sains Materi Indonesia
Sitorus, Raya Uli
Unknown Affiliation
Biochemistry, Genetics & Molecular Biology Chemistry Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Pembuatan Tapai Ketan Putih: Making White Glutinous Tapai Sitorus, Raya Uli; Toepak, Erwin Prasetya
Jurnal Jejaring Matematika dan Sains Vol. 4 No. 2 (2022): Vol. 4 No. 2 (2022): Edisi Desember 2022
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jjms.2022.v4.i2.709

Abstract

Glutinous tapai has a sweet and slightly sour taste and a distinctive taste because it contains alcohol, besides that the texture will be softer. Traditionally it takes 3-4 days to make white sticky rice tapai so that the tapai is sweet and soft. In the process of fermenting sticky rice will produce alcohol and CO2 (Carbon dioxide). White glutinous rice contains the most carbohydrates (79.40 g per 100 g of material) when compared to carbohydrates in cassava (34.7 g per 100 g of material. The greater the amount of glucose contained in an ingredient, the higher the amount of ethanol produced from the breakdown of glucose by the high amount of yeast (Saccharomyces cereviceae) in the tape that is made. . According to the results tapai has a slightly sweet taste with a slight alcoholic taste and a distinctive fragrant aroma. The texture is soft and watery and produces liquid which is the effect of the effect fermentation. Because the sweet taste of tapai is influenced by the sugar content of the tapai itself. The changes that occur are generally in accordance with the existing theory, the results of tapai are not optimal because the tapai still has a rather hard texture and does not have much water and taste which is not too sweet. This is because the fermentation time is short, which is only 3 days, and "the 3rd day of fermentation obtained low microorganism growth and the highest growth and height of microorganisms was the 9 day fermentation time"..
A Review on Development of Porous Aluminosilicate-Based Zeolite Adsorbent for Heavy Metal Pollution Treatment Hakim, Muh. Supwatul; Iqbal, Rendy Muhamad; 'Adany, Fildzah; Putra, Riandy; Nitriany, Ici; Telaumbanua, Idam Sulastri; Sitorus, Raya Uli; Dewi, Rey Kamala
Jurnal Sains Materi Indonesia Vol. 25 No. 2 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.1076

Abstract

Heavy metal contamination endangers human health and has been identified as a global issue. The rising concentration of heavy metals in industrial and domestic wastewater has prompted the quest for effective technologies and treatments to remove them. Zeolite is a promising material for eliminating heavy metals from diverse sources that pollute wastewater. Zeolite is a crystal comprised of hydrated aluminosilicates of alkali and alkaline earth metals in a threedimensional crystal network composed of easily controllable SiO4 4− and AlO4 5− . This review focuses on the critical analysis of the application of several zeolites for the adsorption of heavy metals from wastewater, namely Cd(II), As(III and V), Cr(III and VI), Cu(II), Pb(II), Ni(II), Mn(II), and Hg(II). The results of heavy metal removal reported by zeolites are summarized, and the chemical modification of zeolites with acid/base/salt reagents, surfactants, and metal reagents has been investigated, compared, and discussed. The adsorption/desorption capabilities, systems, operational parameters, isotherms, and kinetics of zeolites are then explained and compared.
Co-Authors 'Adany, Fildzah Dewi, Rey Kamala Erwin Prasetya Toepak Hakim, Muh. Supwatul Iqbal, Rendy Muhamad Nitriany, Ici Riandy Putra Telaumbanua, Idam Sulastri