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All Journal Jurnal Bahan Alam Terbarukan ALKIMIA : Jurnal Ilmu Kimia dan Terapan Indonesian Journal of Halal Research Jurnal Teknologi Lingkungan
Astri Senania, Astri
Department Of Chemistry, Faculty Mathematics And Science, Universitas Garut
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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THE SYNTHESIS OF GLYCEROL CARBONATE FROM BIODIESEL BYPRODUCT GLYCEROL AND UREA OVER AMBERLYST 36 Senania, Astri; Sulistyo, Hary; Prasetya, Agus
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.7691

Abstract

The increasing use of biodiesel as renewable fuels leads to the increasing of glycerol amount as a byproduct of biodiesel production. One of the glycerol derivative products that is environmentally friendly and renewable is glycerol carbonate. Glycerol carbonate is commonly used as a raw material for polymers, surfactants, emulsifiers, lubricants, paints, also used in the cosmetics and pharmaceutical industries. In this study, the research was carried out by using a batch reactor with a three-neck flask equipped with reverse cooling, thermometers, mercury stirrer, and heating mantle with the conditions of the reaction temperature around 373 – 413 K, mole ratio of reactants of urea: glycerol were 1:0,5, 1:1, 1:1,5, 1:2 and 1:4  and the concentration of catalyst were 1%, 2%, 3%, 4% and 5% respectively. Reaction was done for four hours. The results showed that the formation of glycerol carbonate from glycerol and urea using a catalyst Amberlyst 36 is affected by the catalyst concentration, reaction temperature and the ratio of reactants used. The highest glycerol conversion was obtained at 55.07% at a temperature of 393 K with mole ratio of urea and glycerol 1:0,5 and the percentage of catalyst 3% of the amount of glycerol.
THE SYNTHESIS OF GLYCEROL CARBONATE FROM BIODIESEL BYPRODUCT GLYCEROL AND UREA OVER AMBERLYST 36 Senania, Astri; Sulistyo, Hary; Prasetya, Agus
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.7691

Abstract

The increasing use of biodiesel as renewable fuels leads to the increasing of glycerol amount as a byproduct of biodiesel production. One of the glycerol derivative products that is environmentally friendly and renewable is glycerol carbonate. Glycerol carbonate is commonly used as a raw material for polymers, surfactants, emulsifiers, lubricants, paints, also used in the cosmetics and pharmaceutical industries. In this study, the research was carried out by using a batch reactor with a three-neck flask equipped with reverse cooling, thermometers, mercury stirrer, and heating mantle with the conditions of the reaction temperature around 373 – 413 K, mole ratio of reactants of urea: glycerol were 1:0,5, 1:1, 1:1,5, 1:2 and 1:4  and the concentration of catalyst were 1%, 2%, 3%, 4% and 5% respectively. Reaction was done for four hours. The results showed that the formation of glycerol carbonate from glycerol and urea using a catalyst Amberlyst 36 is affected by the catalyst concentration, reaction temperature and the ratio of reactants used. The highest glycerol conversion was obtained at 55.07% at a temperature of 393 K with mole ratio of urea and glycerol 1:0,5 and the percentage of catalyst 3% of the amount of glycerol.
The Opportunities of Using Malay Apple (Syzygium malaccense (L). Merr. & Perry) Wood Stem Extract as Halal and Thayyib Antidiabetic Drugs Nenden Fauziah; Astri Senania; Dhoni Anshar Nuari; Marginingsih Setianingrum
Indonesian Journal of Halal Research (IJHAR) Vol 1, No 2 (2019): August
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ijhar.v1i2.5328

Abstract

The use of existing antidiabetic drugs generally causes dangerous side effects, while the use of insulin has a problem with the halal status of the ingredients. Treatment with halal and thayyib medicinal ingredients is needed by Muslims, so it is necessary to find antidiabetic drugs that are halal and thayyib. The use of natural materials such as malay apple can be a solution for halal medicine. The study on antihyperglycemic activity of extracts of malay apple stem wood have been done. Invivo studies were carried out on animal experiments in male swiss webster mice using the glucose tolerance method. The experimental results showed a decrease in blood glucose levels after feeding with extract of malay apple stem wood at doses of 100 mg/Kgbw, 200 mg/Kgbw and 400 mg/Kgbw, which were significantly different compared to the control group (p <0.05), but effective doses shown at a dose of 100 mg/Kgbw. Measurement of moisture and ash content, levels of heavy metal and microbial contamination, showed that the simplicia of malay apple stem wood is safe. The results of this study indicate that malay apple wood extract is a material that is very likely to be used as antidiabetic drugs that are halal and thayyib.
Antioxidant Activity and Bioactive Compounds of Ethyl Acetate Fractions from Syzygium cumini Wood Stem Alawiyah, Aika Latifah; Senania, Astri
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (611.728 KB) | DOI: 10.19109/alkimia.v5i1.7143

Abstract

Syzygium cumini is one of the endemic plants in Indonesia that has the potential to be developed. The fruit was known to have potential as a diabetes drug. However, very few studies to determine the medicinal potential and identification of compounds of Syzygium cumini wood stem has never been studied before. Therefore, this study aimed to determine the antioxidant activity and content of compounds in Syzygium cumini wood stem ethyl acetate fraction. The crude ethanol extract was prepared from the wood stem powder of Syzygium cumini in ethanol using maceration. Furthermore, it was carried out by the liquid-liquid fractionation process using solvents of different polarity. Antioxidant activity of the crude extract, hexane fraction, and ethyl acetate fraction was determined by spectrophotometric methods using 1,1-diphenyl-2-picrylhydrazyl (DPPH). Analysis of bioactive compounds by using Thin Layer Chromatography (TLC). Identification of compounds functional groups was carried out to support the results of TLC analysis by using Fourier-transform infrared (FTIR). Ethyl acetate fraction showed the highest antioxidant activity (IC50 13,62 µg/mL), followed by ethanol extract (IC50 19,64 µg/mL) and hexane fraction (IC50 61,25 µg/mL). The antioxidant activity of the acetate fraction was lower than that of ascorbic acid with an IC50 value of 2,85 µg/mL. However, this fraction has very strong antioxidant activity. The TLC analysis results showed that the sample was thought to contain an alkaloid, phenolic, flavonoid, and terpenoid. The assumption on agreement with FTIR analysis which showed functional groups were C-H, O-H, N-H, C=O, and C=C aromatics as constituents of these compounds.
Protein Recovery from Tofu Whey Wastewater Using a Column Reactor: Preliminary Results: Pemulihan Protein dari Limbah Tahu Pekat Menggunakan Reaktor Kolom: Hasil Pendahuluan INTAN PERMATASARI; ASTRI SENANIA; FITRI DARA; ATTI SHOLIHAH; SAMBAS SAMBAS; ACHMAD SYAMSUDIN; MUCHLIS MUCHLIS; WIDYARANI WIDYARANI
Jurnal Teknologi Lingkungan Vol. 24 No. 2 (2023)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2023.728

Abstract

ABSTRAK Industri tahu menghasilkan air limbah pekat atau whey (dadih), yang memiliki pH rendah dan bahan organik yang tinggi, sehingga dapat menyebabkan pencemaran lingkungan jika tidak diolah dengan baik. Di sisi lain, salah satu kandungan limbah tahu pekat yaitu protein dapat dimanfaatkan kembali untuk mengurangi potensi pencemaran lingkungan dan diolah lebih lanjut menjadi produk yang bernilai ekonomis. Penelitian ini bertujuan untuk mendapatkan data awal untuk menilai kelayakan penggunaan metode fraksinasi busa untuk pemulihan protein dari limbah tahu pekat. Limbah tahu pekat dalam penelitian kami memiliki konsentrasi protein awal 3.115 mg/l. Percobaan dilakukan dengan menggunakan reaktor fraksinasi busa berbentuk kolom dalam mode semi-curah. Kombinasi tiga laju alir udara (10, 30, dan 60 l/jam) dan tiga konsentrasi limbah tahu pekat (10, 50, dan 100%) diuji. Hasil percobaan menunjukkan bahwa konsentrasi protein awal mempengaruhi pemulihan protein, sehingga diperlukan konsentrasi protein awal sekitar 3.000 mg/l. Rasio pengayaan tertinggi 1,0 ± 0,5, setara dengan pemulihan protein 6 ± 4%, dicapai pada laju alir 10 l/jam dan konsentrasi limbah tahu pekat 100%. Peningkatan laju alir hingga 30 l/jam tidak mengubah rasio pengayaan (0,9 ± 0,2), tetapi meningkatkan pemulihan protein hingga 71 ± 14%. Penelitian lebih lanjut diperlukan untuk parameter-parameter lain seperti konsentrasi protein awal, komposisi limbah tahu pekat, laju aliran udara, ukuran gelembung, holdup cairan, dan desain reaktor. ABSTRACT The tofu industry generates highly-polluted wastewater called whey, which has a low pH and high organic matter, and therefore can cause environmental pollution when not treated properly. On the other hand, one of the whey constituents namely protein can be recovered from the wastewater to reduce its environmental potency and to be further processed as a product that has an economic value. This study aimed to obtain preliminary data to assess the feasibility of using the foam fractionation method for the recovery of protein from tofu whey wastewater. Tofu whey in our study had an initial protein concentration of 3115 mg.L-1. The experiment was performed using a column foam fractionation reactor in a semi-batch mode. Combinations of three air flow rates (10, 30, and 60 L.h-1) and three tofu whey concentrations (10, 50, and 100%) were tested. Our results show that initial protein concentration influenced protein recovery, with a protein concentration of approximately 3000 mg.L-1 required. The highest enrichment ratio of 1.0 ± 0.5, which corresponded to 6 ± 4% protein recovery, was achieved at 10 L.h-1 flow rate and 100% whey concentration. Increasing the flow rate to 30 L.h-1 did not change the enrichment ratio (0.9 ± 0.2), but increased the protein recovery to 71 ± 14%. Further investigation is needed for parameters such as initial protein concentration, whey composition, air flow rate, bubble size, holdup time, and reactor design.  
Co-Authors Achmad Syamsudin Agus Prasetya Alawiyah, Aika Latifah ATTI SHOLIHAH Dhoni Anshar Nuari FITRI DARA Hary Sulistyo Intan Permatasari Marginingsih Setianingrum Muchlis Muchlis Nenden Fauziah SAMBAS SAMBAS WIDYARANI WIDYARANI