Article Per Year (5 Year)
p-Index From 2020 - 2025
0.61
P-Index
This Author published in this journals
All Journal Indonesian Green Technology Journal The Journal of Pure and Applied Chemistry Research Journal of Coffee and Sustainability
Almayda, Nabila
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Other

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Identifikasi Komposisi dan Uji Kualitas Briket Arang Komersial Hana Rofidah; Ramadhani, Titi Asri; Salsabila, Isadora Evani; Laila Fq, Siti Shofiah Aghnani Alfi; Almayda, Nabila
Indonesian Green Technology Journal Vol. 12 No. 1 (2023)
Publisher : Sekolah Pascasarjana, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.igtj.2023.012.01.04

Abstract

Briket arang merupakan salah satu produk hasil pengolahan limbah kayu yang berguna untuk bahan bakar alternatif. Saat ini, pemanfaatan briket arang di masyarakat sudah semakin banyak. Dalam penggunaannya, briket arang harus memiliki kualitas yang bagus untuk memberikan nyala api dan panas yang maksimal. Pada penelitian ini dilakukan identifikasi komposisi dan uji kualitas pada briket arang komersial. Adapun briket arang yang digunakan adalah briket A, merupakan briket arang yang diklaim berstandar ekspor dan briket B, sebagai pembanding, merupakan briket arang komersial berasal dari produsen lokal. Pengujian komposisi briket arang dilakukan menggunakan FTIR dan XRF, sedangkan uji kualitas briket dilakukan dengan uji kadar air, uji kadar abu, uji nilai kalor, dan uji nyala api. Hasil analisis FTIR menunjukkan performa yang lebih unggul pada briket A karena tidak terlihat adanya puncak khas pada spektrum FTIR, yang menunjukkan bahwa terjadinya pembakaran yang lebih sempurna pada senyawa organik yang digunakan dalam bahan tersebut. Hasil analisis XRF menunjukkan bahwa kedua briket memiliki komposisi unsur (Ca, Fe, K, Si, dan Mn) yang hampir sama dalam hal bahan dan material yang digunakan. Rata-rata kadar air pada briket arang A adalah 9,44%, sedangkan pada briket arang B adalah 5,74%. Kadar abu pada briket A adalah 2,4% sedangkan pada briket B adalah 4,266%. Uji nyala pada briket B menunjukkan kemampuan untuk terbakar lebih mudah daripada briket A. Nilai kalor briket A adalah 6.542,59 kal/gram, sedangkan pada briket B adalah 6.381,87 kal/gram. Kata kunci: briket arang, pengujian, komposi, karbon, suhu
Evaluation of Bioactive Compounds, Release Profiles, and Toxicity Test from Microcapsules Containing R. tuberosa L. Extracts Utilizing Gum Arabic Almayda, Nabila; Roosdiana, Anna; MASRURI, Masruri; Safitri, Anna
The Journal of Pure and Applied Chemistry Research Vol. 13 No. 1 (2024): Edition January-April 2024
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2024.013.01.3336

Abstract

This study is essential to analyze the toxicity and release of bioactive compounds in R. tuberosa L. extract microcapsules coated with gum Arabic and to provide information on the use of microcapsules as a drug delivery system with controlled release of active ingredients. Investigations focused on the effect of pH and timing on discharge kinetics, as well as toxicity evaluation. The release of active ingredients from microcapsules was carried out in medium variations, namely pH 2.2 and pH 7.4, with release durations of 30, 60-, 90-, 120-, and 150-min. Bioactive compounds were released by 59.23% at pH 2.2 and 58.21% at pH 7.4 within 150 min. The BSLT (brine shrimp lethal toxicity) assay was used using brine shrimp larvae (Artemia salina L.), resulting in a non-toxic classification as evidenced by an LC50 value of 5729 μg/mL. Microcapsules in optimum conditions were then characterized using FTIR (Fourier-Transform Infrared) and SEM (scanning electron microscopy) instruments. The FTIR analysis showed variations in functional groups in R. tuberosa L. extracts, gum Arabic, and microcapsules. Furthermore, the SEM examination highlighted the morphology of microcapsules that were mostly spherical.
Analysis of Caffeine Content of Liberica Coffee (Coffea liberica) with Variations of Roasting Methods at Kalipuro Research Center, Banyuwangi District Almayda, Nabila; Najih, Riyan Riyadlun
Journal of Coffee and Sustainability Vol. 1 No. 1 (2024)
Publisher : Directorate of Research and Community Services

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jcs.2024.01.01.02

Abstract

The roasting process is one of the keys in the coffee production stage. Roasting affects the quality of coffee in terms of organoleptic characteristics.This study aims to analyze the chemical content of liberica coffee. The research was carried out at the Kalipuro Research Institute (Kembang Galengan) using two types of roasting methods, namely conventional and modern (machine-roasted). Testing of liberica coffee samples by analyzing water content, ash content, acidity levels (pH), and caffeine. The results showed that modern coffee roasting produces a water content of 4%, ash content of 5.1%, acidity (pH) of 4.7, and caffeine content of 0.47%. Meanwhile, conventional roasting produces a water content of 2.5%, ash content of 4.9%, acidity (pH) of 4.7%, and caffeine content of 0.28%. Based on these results, it can be concluded that all categories of liberica coffee processed conventionally and modernly (machine-roasted) at the Kalipuro Research and Development Center qualify for SNI standards.
Co-Authors Anna Roosdiana Hana Rofidah Laila Fq, Siti Shofiah Aghnani Alfi Masruri Masruri Ramadhani, Titi Asri Riyan Riyadlun Najih Safitri, Anna Salsabila, Isadora Evani