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Edible coating from VCO, iota-carrageenan and alginate blends for pindang fish preservation

Green Materials 2023年第1期13卷 3-16页

作者： Iswahyuni, Hana Suyatma, Nugraha Edhi Wulandari, Nur Irianto, Hari Eko Dewi, Fera Roswita Nurhayati Sinurat, Ellya Nurbayasari, Rodiah Giyatmi Fransiska, Dina Analyst Ministry for Marine Affairs and Fisheries IPB University Bogor Indonesia Master of Food Technology Study Program Graduate School IPB University Bogor Indonesia Department of Food Science and Technology Faculty of Agricultural Engineering and Technology IPB University Bogor Indonesia Research Center for Marine and Land Bioindustry National Research and Innovation Agency of the Republic of Indonesia Lombok Indonesia Food Technology Study Program Faculty of Food Technology and Health Sahid University Jakarta Indonesia Research Center for Applied Microbiology National Research and Innovation Agency of the Republic of Indonesia Cibinong Indonesia

This study aims to develop an edible coating based on virgin coconut oil (VCO) nanoemulsion, iota-carrageenan and alginate to prolong the shelf life of pindang (mildly salted cooked) fish products. The research involved three stages: material preparation, characterization and determination of factors and responses for experimental design;parameter optimization to achieve optimal conditions;and application and analysis of pre- and post-coating characteristics of pindang fish. The parameter ranges were 0.5–1.5% for alginate concentration, 0.5–1.5% for iota-carrageenan concentration and 0.5–1.0% for VCO nanoemulsion concentration. The result of this study was an optimized food coating solution that was clear and bright white in color. Pindang fish coated with this layer showed improved quality in terms of water content (48.46%), weight loss (0.39%), pH (5.84), total volatile base (47.01%), salt content (2.9%), appearance (7), texture (7) and slime (7). At the same time, the total bacterial count remained unchanged (8 log colony-forming units (CFU)/g), the mold count remained unchanged (5 log CFU/g) and the aroma and taste received a score of 6. Thus, this study successfully produced an optimized edible coating that can enhance the quality and extend the shelf life of pindang fish, making it suitable for broader market distribution. © 2023 ICE Publishing. All rights reserved.

关键词： Fish

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The Effect of EPS Addition to Soil Stabilized with Fly Ash as Lightweight Fill Materials for Embankment Construction 1

The Effect of EPS Addition to Soil Stabilized with Fly Ash a...

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2018 1st Workshop on engineering, Education, applied Sciences, and Technology, WEAST 2018

作者： Syahril Somantri, Andri Krisnandi Febriansya, Aditia Civil Engineering Department Politeknik Negeri Bandung Bandung Indonesia Post-Graduate Stud. of Infrastructure Engineering Study Program Applied Master Program Politeknik Negeri Bandung Bandung Indonesia

Design and construction of road embankment presents several challenges, including the possibility of bearing capacity failure, large total settlement, differential settlement, and slope instability, which may result from the weight of the embankment construction itself, and/or weak foundation. A number of techniques have been developed and can be used to overcome these problems, one of them is by modifying the weight of the embankment itself with the use of lightweight materials, such as soil-EPS mixture. The use of soil-EPS mixture as lightweight material provides several advantages, among which can achieve the same volume or elevation requirement with a significantly lighter weight compared to ordinary materials, improving slope stability, embankment over high compressibility soil, and to reduce soil pressure to soil retaining structures, abutment or bridge pillar. Fly ash also added to act as binder to increase shear strength of mixture. The result of the compaction test shows that the addition of a small amount of EPS to the mixture can significantly reduce the maximum dry density of the mixture. Triaxial UU and UCS test results show a reduction in mixture strength as EPS contents increase, but due to the presence of fly ash increases the strength of mixture as the number of day increases, so that the use of lightweight materials has the potential to be one of soil improvement solutions. © Published under licence by IOP Publishing Ltd.

关键词： Mixtures

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The influence of Ground Granulated Blast Furnace Slag (GGBFS) as Portland Composite Cement (PCC) substitution in improving compressive strength of concrete

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IOP Conference Series: Materials Science and engineering 2021年第2期1098卷

作者： R Raafidiani S Sumargo R Permana Master of Applied Infrastructure Engineering Study Program Civil Engineering Department Politeknik Negeri Bandung Jl. Gegerkalong Hilir Bandung Indonesia Civil Engineering Department Universitas Jenderal Achmad Yani Jl. Terusan Jenderal Sudirman Cimahi Indonesia

Concrete is a construction material that is extensively used to build various infrastructures. The increasing of basic human facilities and the resulting infrastructures in increasing needs of concrete and cement concrete as the material forming. Many problems in the concrete producing industry are not sustainable. Because of concrete production uses enormous natural resources and the main binding material in concrete is cement. Cement is the result of calcination of lime roomates in the process results in the release of carbon dioxide (CO2). To mitigate this problem and for sustainability concrete, many researches have been done to find a replacement for cement. Geopolymer concrete is an alternative to reduce part of cement. Ground Granulated Blast Furnace Slag (GGBFS) that consist of silica and alumina can be used as a binder to replace part of the Portland Composite Cement (PCC). In this study, concrete compressive strength tests were carried out on 48 specimens of concrete cylinder 15x30 cm. The ratio of substitution GGBFS/PCC used were 0/100, 40/60, 50/50 and 60/40. The specimens were cured at room temperature then tested at the age of 7, 14, 21 and 28 days. The results show that the average compressive strength of concrete at the age of 28 days that GGBFS/PCC ratio of 0/100, 40/60, 50/50 and 60/40 were 26.50, 23.01, 26.65 and 22.56 MPa, respectively. Based on the analysis, 50% substitution of GGBFS can be used to partially replace cement because has the same as normal compressive strength of concrete and can be classified as environmentally friendly or green concrete.

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A study of Eye Lens Radiation Dose Reduction During Head CT Scan Examination

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Journal of Medical Imaging and Radiation Sciences 2022年第4期53卷 S25-S25页

作者： Nur Istiqomah, Anisa Dewi, Sofie Nornalita Mufida, Widya Radiology Study Program Faculty of Health Sciences Universitas ‘Aisyiyah Yogyakarta Sleman DI Yogyakarta 55292 Indonesia Biomedical Engineering Program Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Depok West Java 16424 Indonesia Diagnostic Imaging Program Master of Applied Science Health Polytechnic of Semarang Semarang City Central Java 50268 Indonesia

BackgroundHead CT is the most frequently performed examination in every hospital in Indonesia. Considering of the large radiation dose of head CT produces and eye which is one of the most sensitive organs, radioprotection is should be done for every patient of head CT. The aim of this study is to determine the radiation dose of eye lens during head CT compared to the dose limit value determined by ICRP No. 87 of 2000 and provides recommendations for examination protocols that prioritize radiation protection in order to reducing eye lens radiation dose. MethodsRadiation dose measurement of eye lens were performed on 10 patient samples using two different scanograms for every 5 patients. The first five patients had a scanogram parallel to the Orbitomeatal line (OML) and the other 5 patients had a scanogram parallel to the Supraorbitomeatal line (SOML). Radiation dose measurement is done by placing the Thermoluminescent Dosimeter 100-chip on one of the patient's eyelid surfaces. The results of the radiation dose measurements are presented and compared with the standard dose CT scan according to ICRP No. 87 2000. ResultsThe research showed that the procedure using scanogram parallel to OML get eye lens radiation dose 53.889 mGy, 50.729 mGy, 60.407 mGy, 70.952 mGy, 70.952 mGy and the other procedure which is using scanogram parallel to SOML get eye lens radiation dose 7.265 mGy, 6.944 mGy, 8.747 mGy, 6.411 mGy, 6.944 mGy. ConclusionThe procedure using scanogram parallel to the OML produces a higher dose of eye lens and it exceeds the standard head CT eye lens dose according to ICRP No. 87 of 2000. While the another procedure using scanogram parallel to SOML produces a lower radiation dose. Head CT is advised to use a scanogram parallel to SOML to reduce the eye lens radiation dose.

关键词： Head CT scan Radiation Dose Orbitomeatal line Supraorbitomeatal line TLD

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Fabrication a sustainable adsorbent nanocellulose-mesoporous hectorite bead for methylene blue adsorption

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Case Studies in Chemical and Environmental engineering 2024年 10卷

作者： Holilah Asranudin El Messaoudi, Noureddine Ulfa, Maria Hamzah, Amir Hamid, Zuratul Ain Abdul Ramadhani, Dini Viandi Suryanegara, Lisman Mahardika, Melbi Melenia, Alvina Tata Pratama, Agus Wedi Prasetyoko, Didik Research Center for Biomass and Bioproducts National Research and Innovation Agency of Indonesia (BRIN) Research Collaboration Center for Nanocellulose BRIN-Andalas University Research Collaboration Center for Biomass and Biorefinery Between BRIN and Universitas Padjadjaran Laboratory of Applied Chemistry and Environment Faculty of Sciences Ibn Zohr University Chemistry Education Study Program Faculty of Teacher Training and Education Sebelas Maret University Deputy for Infrastructure Research and Innovation National Research and Innovation Agency of Indonesia (BRIN) School of Materials & Mineral Resources Engineering Universiti Sains Malaysia Department of Biology Faculty of Science and Data Analytics Institut Teknologi Sepuluh Nopember Department of Chemistry Faculty of Science and Data Analytics Institut Teknologi Sepuluh Nopember (ITS) Kampus ITS Sukolilo

In this study, fabrication of mesoporous nanocellulose-hectorite-alginate bead (B-NcH) composites and their application for adsorption of MB from water was carried out. The synthesis of nanocellulose (NC) was conducted from mangosteen waste peel (Garcinia mangostana L.). Garcinia mangostana L. peel had 58.9 ± 0,41 % content of cellulose. NCs was successfully isolated using the acid hydrolysis method. NC from Garcinia mangostana L. peel had a diameter of 24.5 ± 0.2 nm and a length of 381.2 ± 10.4 nm. The superabsorbent was composed of nanocrystalline cellulose, mesoporous hectorite, and alginate. The functional group, phase, and morphology of composite was investigated. The composite with 5 % NC had excellent mechanical strength. The B-NcH5 showed a high adsorption capacity of methylene blue (MB), reaching 98.64 % at an adsorbent dose of 30 mg for 90 min. The presence of hectorite can increase the adsorption ability compared to NCs-alginate. The equilibrium adsorption data followed the Freundlich isotherm;however, the kinetics of adsorption showed the usefulness of adopting the PSO kinetic model. The highest adsorption capacity of B-NcH5 for MB was determined to be 57.59 mg/g. For thermodynamic studies, it was revealed that the adsorption of MB on BNcH-5 is a spontaneous and endothermic process. The removal efficiency was observed in six consecutive cycles, indicating at the favorable reusability of this adsorbent. These results validate the potential use of this B-NcH5 adsorbent for water treatment applications. © 2024

关键词： Adsorption Bead Hectorite Methylene blue Nanocellulose Water treatment

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The effect of using crumb rubber on fatigue and rutting lives in flexible pavement

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IOP Conference Series: Materials Science and engineering 2020年第1期732卷

作者： T A Balqis S Suherman Post-Graduate Student of Infrastructure Engineering Study Program Applied Master Program Politeknik Negeri Bandung Bandung Indonesia Civil Engineering Department Politeknik Negeri Bandung Bandung Indonesia

This research is performed to analyze effect of using crumb rubber (CR) on the overlay design of Palembang City – Betung roads. Analysis of existing road conditions using the AASHTO 1993. This analysis based on deflection data using the Falling Weight Deflectometer (FWD). While, the overlay design analysis using CIRCLY 7.0 software to determine horizontal tensile strain (εh) for fatigue live and vertical compressive strain (εv) for rutting live parameters. The result showed that using CR can increase fatigue live into 66 % and rutting lives into 22 % for contribute pavement performance. To ensure the effect of CR in pavement's performance, further research must be taken to find out if there are other effects that support.

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Comparative study of asphalt concrete characteristic between ideal gradation and laboratory tested gradation with crumb rubber

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IOP Conference Series: Materials Science and engineering 2019年第1期650卷

作者： Asep Sundara Risna Rismiana Sari Tanya Audia Balqis Civil Engineering Department Politeknik Negeri Bandung Bandung Indonesia Post-Graduate Student of Infrastructure Engineering Study Program Applied Master Program Politeknik Negeri Bandung Bandung Indonesia

Modifying asphalt concrete with using Crumb Rubber (CR) can provide environmental benefits. The method used in this study is an experimental laboratory with Mashall machine. The tests used two types of gradation, namely the gradations of Ideal and Laboratory Test. CR used in a mixture with a dry process method to replacement 0%, 5%, 15% and 20% of the weight aggregate at fraction No. 30 (0.6 mm). The results showed that the Ideal gradation mixture has a better characteristic than the mixture of laboratory tested gradations. Ideal gradations can increased stability into 10% from Laboratory Test gradations for mixture without CR. Addition of CR contect in AC mixture did not significantly effect for the characteristics. To ensure the effect of CR in mixture, further test must be taken.

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The Effect of EPS Addition to Soil Stabilized with Fly Ash as Lightweight Fill Materials for Embankment Construction

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Journal of Physics: Conference Series 2019年第1期1364卷

作者： Syahril Andri Krisnandi Somantri Aditia Febriansya Civil Engineering Department Politeknik Negeri Bandung Bandung Indonesia Civil Engineering Department Politeknik Negeri Bandun Bandung Indonesia Post-Graduate Student of Infrastructure Engineering Study Program Applied Master Program Politeknik Negeri Bandung Bandung Indonesia

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Micro Hydro Electric Power Plant (MHEP) Prototype A study Of The Effect Of Blade Numbers Toward Turbine Rotational Velocity

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Journal of Physics: Conference Series 2019年第4期1198卷

作者： Ibnu Asrafi M. Yerizam Sairul Effendi Agung Mataram Renewable Energy Study Program Applied Sciences Master Program Politeknik Negeri Sriwijaya Jalan Srijaya Negara Bukit Besar Palembang Engineering Department Politeknik Negeri Sriwijaya Mechanical Engineering Department Politeknik Negeri Sriwijaya Palembang Mechanical Engineering Department Engineering Facult Sriwijaya University Sumatera Selatan Indonesia

Micro hydro electric power plant (MEPP) prototype is a small scale power plant (less than 100 kW) that utilizes height difference and water discharge per second. Prototype consists of a water pump, where capacity of 41 liter per minute serving as turbine driving force channelled through a nozzle, with a 40 liter water reservoir, and the water flow rate controller is a gate valve. The results show that at blade counts of 4,8,12, and 16, and with water discharge at 40 l/s, 35 l/s, 30l/s, and 25 l/s, with nozzle shooting angle of 50 °, the turbine rotational velocities are 310 rpm, 639 rpm, 655.5 rpm, and 691.3 rpm respectively. Furthermore, at water discharge of 35 l/s, the velocities are 293.3 rpm, 375,3 rpm, 412.7 rpm, 446.2 rpm, and at water discharge of 30 l/s, they are 240.3 Rpm, 395.0 rpm, 430.5 rpm, 445.2 Rpm. Moreover, at water discharge 25 of l/s, the speeds are 285.5 rpm, 330.5 rpm, 426.0 rpm, 431.1 rpm. It is concluded that the higher the water discharge rate, the greater the number of rotation, and it is also concluded that shooting angle has a significant effects on pelton turbine rotation and power.

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Fatty Acids From Microalgae Botryococcus braunii For Raw Material of Biodiesel

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Journal of Physics: Conference Series 2018年第1期1095卷

作者： P Dilia K Leila Rusdianasari Applied Master of Renewable Energy Engineering Politeknik Negeri Sriwijaya Jl. Srijaya Negara 30139 Palembang Indonesia Renewable Energy Engineering Study Program Politeknik Negeri Sriwijaya Jl. Srijaya Negara 30139 Palembang Indonesia

One of the alternative sources of renewable energy that can overcome the environmental crises and the current fossil energy crisis is microalgae. Microalgae contain fatty acids that can be converted into biofuel products, such as biodiesel. This study was a preliminary research which was conducted to determine the amount of fatty acids contained in microalgae and its potentiality to be converted into biodiesel. The microalgae used in this study were Botryococcus braunii. Data collection of fatty acids of Botryococcus braunii were obtained by the direct analysis in the laboratory using an instrument in the form of gas chromatography mass spectrometry (GC-MS) and also obtained from literature study in several research of previous researcher. Based on that, it was found out that Botryococcus braunii contained with oleic acid ranged from 15.65 – 35.85%, linoleic acid 3.05 – 23.15%, palmitic acid 4.03 – 22.13 % and stearic acid 0.48 – 15.41%. The profile and fatty acid content of this preliminary study could be one of the decisive parameters in the selection of microalgae species. Based on results concluded that Botryococcus braunii had good potentiality to be converted into biodiesel because the ratio of saturated and unsaturated fatty acids in this species is not much different.

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