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Wahyu Rinaldi
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Jurusan Teknik Kimia Fakultas Teknik USK Jl. Syech Abdurrauf No.7, Darussalam Banda Aceh - 23111
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Journal of Applied Technology
Published by Universitas Syiah Kuala
ISSN : 16932536     EISSN : 29643198     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering
The JAT covers research and developments activities in the area of chemical and environmental applied technologies in the following scope and focus: • Chemical and Process Technology • Food Chemistry and Technology • Energy Technology • Catalyst Technology • Vegetable and Essential Oil Technology • Natural Product and Pharmacy • Analytical Chemistry • Material Technology • Polymer and Environmental Science.
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol 10, No 1 (2023)" : 7 Documents clear
Antioxidant Activity of Aceh Curry Leaves (Murraya Koenigii) Extracted Using Various Solvents Desy Anggriani; Lisa Azila; Cut Meurah Rosnelly; Hisbullah Hisbullah; Syaubari Syaubari; Teuku Mukhriza
Journal of Applied Technology Vol 10, No 1 (2023)
Publisher : Journal of Applied Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (244.098 KB)

Abstract

Free radicals are molecules that are highly reactive and contain unpaired electrons. These molecules are harmful to healthy cells. Antioxidants have the ability to neutralise free radicals by donating one of their electrons to the molecules that make up free radicals. This prevents free radicals from wreaking havoc on healthy cells. Curry leaf, also known as Murraya Koenigii, is a member of the Rutaceae family and is a spice that is commonly used. By gauging the degree to which various solvents and ratios are able to extract antioxidants from curry leaves, the objective of this study is to find the optimal solvent and combination for doing so. A Soxhlet and a solvent mixture consisting of hexane, chloroform, and ethanol in a ratio of 1:10 were used to extract the anti-oxidant components of curry leaves. With a yield percentage of 30.53 percent, the ethanol solvent proved to be the most efficient of the three in terms of extracting antioxidants from the sample. Not only did extracts of curry leaves obtained from the ethanol solvent have the best yield (when compared to extracts derived from other solvents), but they also have the highest levels of inhibition (54.42%) and antioxidant activity (40.667 ppm) when it comes to catching free radicals.
The Effect of Chitosan Concentration on the Mechanical Strength of Anti- Bacterial Biodegradable Plastic Made from White Sweet Potato Starch (Ipomoea batatas) Lia Mairiza; Sofyana Sofyana; Aula Chairunnisak; Putri Syafrilia; Silvera Isnaini
Journal of Applied Technology Vol 10, No 1 (2023)
Publisher : Journal of Applied Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.655 KB)

Abstract

Research on antibacterial biodegradable plastic made from white sweet potato starch (Ipomoea batatas) has been carried out. The purpose of this study was to examine the effect of chitosan concentration on mechanical strength. The independent variables used were the concentration of chitosan, which was 0%; 0.01%; 0.03%; 0.05%; 0.07% (w/v). The mechanism of this research was carried out by dissolving various concentrations of chitosan in glacial acetic acid, with a concentration of 10% (w/v) white sweet potato starch dissolved in distilled water, then adding glycerol as a plasticizer at a gelatinization temperature between 80o-95oC, using a stirring speed of 75 rpm. The research results show that the addition of chitosan can increase the tensile strength value of the film mixed with chitosan and sweet potato starch, where the maximum tensile strength value obtained in this study is found in films with a concentration of 0.07% chitosan worth 0.0645 kgf/cm2 and a maximum value of % elongation of the starch mixture film white sweet potato and chitosan were obtained from films with a chitosan concentration of 0.07%, which is around 5.6%. Meanwhile, the white sweet potato plastic film without chitosan had tensile strength and elongation values of 0.0577 kgf/cm2 and 10.7%, respectively.
Production of Quinone Enzyme from Nicotiana tabacum Cell Culture Using Immobilized Dry Plant Foam Teuku Maimun; Mirna Rahmah Lubis; Komala Pontas; Anwar Thaib; Abubakar Abubakar
Journal of Applied Technology Vol 10, No 1 (2023)
Publisher : Journal of Applied Technology

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Abstract

A study of immobilization of Nicotiana tabacum cell culture to increase the concentration of the quinone enzyme CoQ10 has been carried out. The immobilization medium was in the form of dry plant foam (dry ridge gourd). Cell growth and concentration of quinone enzyme were measured by fresh weight of the cell and High-Performance Liquid Chromatography methods, respectively. Immobilization of the Nicotiana tabacum plant cell culture was effective for cell growth, and increase CoQ10 concentration. CoQ10 concentration from the immobilized cell culture of the Nicotiana tabacum plant was 0.060 mg/g fresh cell weight after seven days of cultivation. The optimum temperature for the concentration of CoQ10 enzyme was 35°C.
Production of Single Cell Protein by Aspergillus niger Using a Mixture of Coffee Husk and Molasses as Substrate Syahiddin Dahlan Said; Muhammad Zaki; Nasrullah - RCL; Mukhlishien Mukhlishien; Maulida Maulida; Meysa Nadia Harahap; Mentarina Rizki
Journal of Applied Technology Vol 10, No 1 (2023)
Publisher : Journal of Applied Technology

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Abstract

Gayo is one of the districts in the province of Aceh, one of the largest Arabica coffee producers in Indonesia. So far, coffee husk produced from coffee fruit processing have not been used optimally, causing environmental problems. Efforts to utilize coffee husk as a substrate to produce single cell protein (SCP) can be considered, besides overcoming environmental problems, it will also produce alternative proteins to substitute traditional proteins. A study has been carried out to evaluate the potential of Gayo Arabica coffee husk as a substrate to produce SCP using solid state fermentation with Aspergillus niger as a bioconversion agent. The results showed that the C/N ratio and water content of the substrate were variables that greatly influenced protein production. The highest protein production was produced by substrate with a C/N ratio of 10 and a water content of 50% (w/w) with a fermentation time of 4 days. Increasing the level of molasses in the substrate mixture linearly increases protein production.Keywords: single cell protein, solid state fermentation, Aspergillus niger, coffee husk, molasses
Recent Status and Research & Development in the Carbon Capture, Utilization and Storage Technology Mahidin Mahidin; Farid Mulana; Adisalamun adisalamun; A.A. Reza; M. F. Dhedia; A. Annisak; Halimatussakdiah Halimatussakdiah; Abdul Hadi
Journal of Applied Technology Vol 10, No 1 (2023)
Publisher : Journal of Applied Technology

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Abstract

The recently rapid extension and expansion of the industrial and energy sector has increased the number of carbon dioxide (CO2) in environment. Consequently, many concerns have been studied about the prevention of global warming and the achievement of climate mitigation strategy.  In this paper, the current situation of many aspects of carbon capture, utilization and storage (CCUS) technologies were concisely reviewed and discussed. The CCUS technology, using CO2 separation/capture, storage, utilisation, and sequestration processes, is currently considered as the most proactive method to prevent the emission of CO2 to the atmosphere and mitigate climate change and global warming. In this paper, the source of CO2 production and which country that produce its carbon dioxide were discussed and also reviewed type of technologies could be adopted to capture of those CO2 with its any advantages and disadvantages. In order to employ those technologies as a cost-effective technology for the reduction of CO2 emissions from the use of fossil fuels, research and development in its related processes and materials should put in a highest priority.
Foam Agent Synthesis For the Production of Foam-Based Concrete Izarul Machdar; Abdullah Abdullah; Adisalamun Adisalamun; Wahyu Rinadi
Journal of Applied Technology Vol 10, No 1 (2023)
Publisher : Journal of Applied Technology

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Abstract

Foam agents are crucial in the durability and performance of foam-based concrete. This study provides a critical finding related to foam agent characteristics, foam decay, the effects of foam modifiers (NaCl), and the properties of foam concrete, including shrinkage, compressive strength, and density. The foaming agent was prepared using sodium dodecyl sulfate (SDS) and triethanolamine (TEA) as a surface active agent, propylene glycol (PG) as a solvent, and NaCl as the foam modifier. The SDS:TEA:PG ratio was 1:1:2. The foam modifier was introduced in 0.1% to 0.8% varying concentrations to assess its impact on foam stability. The surface tension of the foam agent synthesis at a concentration of 20% was measured to be 0.1649 N/m, comparable to the commercial one. The decay rate foam of 0.095, 0.059, 0.063, and 0.013 cm/minute for the concentrations of 20%, 40%, 60%, and 80%, respectively. This suggests that higher concentrations of the foaming agent resulted in a more stable foam structure with slower decay rates. Moreover, the results showed that as the NaCl increased, the viscosity increased, but no effect on foam concentration of 80%. It was also observed that the combined effect of the foam agent concentration and NaCl concentration on viscosity was not linear. The recorded foam concrete shrinkage heights for the 20%, 40%, and commercial foam agent concentrations were 6.45 mm (SD 1.07 mm), 5.04 mm (SD 0.62 mm), and 4.0 mm (SD 0.94 mm), respectively. Furthermore, the compressive strengths of the foam concrete for the 20%, 40% foam agent concentration, and commercial foam were 4.41 MPa (SD 0,79 MPa), 4.20 MPa (SD 0.48 MPa), and 6.32 MPa, respectively. In conclusion, the foaming agent formulated from the mixture of components SDS, TEA, PG, dan NaCl has demonstrated the ability to produce foam concrete with satisfactory quality.
Antioxidant Activity of Aceh Curry Leaves (Murraya Koenigii) Extracted Using Various Solvents Desy Anggriani; Lisa Azila; Cut Meurah Rosnelly; Hisbullah Hisbullah; Syaubari Syaubari; Teuku Mukhriza
Journal of Applied Technology Vol 10, No 1 (2023)
Publisher : Journal of Applied Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Free radicals are molecules that are highly reactive and contain unpaired electrons. These molecules are harmful to healthy cells. Antioxidants have the ability to neutralise free radicals by donating one of their electrons to the molecules that make up free radicals. This prevents free radicals from wreaking havoc on healthy cells. Curry leaf, also known as Murraya Koenigii, is a member of the Rutaceae family and is a spice that is commonly used. By gauging the degree to which various solvents and ratios are able to extract antioxidants from curry leaves, the objective of this study is to find the optimal solvent and combination for doing so. A Soxhlet and a solvent mixture consisting of hexane, chloroform, and ethanol in a ratio of 1:10 were used to extract the anti-oxidant components of curry leaves. With a yield percentage of 30.53 percent, the ethanol solvent proved to be the most efficient of the three in terms of extracting antioxidants from the sample. Not only did extracts of curry leaves obtained from the ethanol solvent have the best yield (when compared to extracts derived from other solvents), but they also have the highest levels of inhibition (54.42%) and antioxidant activity (40.667 ppm) when it comes to catching free radicals.

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