Characterization of Surimi Based Edible Film from Mackerel Tuna Dark Muscle

This research aims to determine the best concentration of surimi made from mackerel tuna dark muscle to produce edible film with characteristics according to JIS (Japanese Industrial Standard) and to determine the characteristics of edible film product. This research was carried out in March to April 2021 at the Fishery Product Processing Laboratory, Faculty of Fisheries and Marine Sciences, Padjadjaran University and Soil Chemistry Laboratory, Faculty of Agriculture, Padjadjaran University. The method used was experimental with Completely Randomized Design (CRD), and treatment with surimi concentration consisted of three treatments with three replications including 8%, 10% and 12%. Parameters observed were thickness, tensile strength, percent elongation and transparency. The resulting data were analyzed using ANOVA and continued with Duncan's test (α=5%). The results showed that an increase in the concentration of surimi made from dark muscle of mackerel tuna had a significant effect on thickness and percent elongation, but an increase in surimi concentration had no significant effect on tensile strength and transparency. Edible film with the addition of 8% concentration of surimi made from mackerel tuna dark muscle had the best characteristics based on the Japanese Industrial Standard (JIS) and statistical analysis, with a thickness of 0.096 mm, tensile strength 486.78 kgf/cm2 percent elongation 211.67%, transparency 5, 72 and 94.28% clarity.

Synthesis and Grafted NH2-Al/MCM-41 with Amine Functional Groups as Humidity Control Material from Silicon Carbide Sludge and Granite Sludge

Mesoporous Al/MCM-41 was synthesized by extracting silicon carbide sludge and granite sludge as the sources of silicon and aluminum. Different concentrations of aminosilane (2.5, 5, 7.5 vol.%) were used to reflux the grafted NH2-Al/MCM-41 with amine functional groups (NH2-Al/MCM-41). The physical and chemical characteristics were analyzed. The results confirmed that silicon carbide sludge and granite sludge can effectively synthesize Al/MCM-41 with low cost and environmental protection. Reflow grafted amine functional groups can effectively improve the surface properties of NH2-Al/MCM-41. The moisture adsorption and desorption capacity of grafted NH2-Al/MCM-41 with amine functional groups was also studied. Based on moisture adsorption and desorption capacity, the surface properties of NH2-Al/MCM-41 were studied. When 5 vol.% of NH2-Al/MCM-41 amine functional groups is added, the moisture adsorption and desorption capacity is best. When the relative humidity = 95%, the equilibrium moisture content is 39.4 kg/kg, which complies with the standard of Japanese Industrial Standard (JIS A 1475). Therefore, the use of waste derived from the industry to replace expensive commercial materials was simple and environmentally friendly, and the grafted NH2-Al/MCM-41 with amine functional groups can be utilized in multiple applications, particularly as moisture regulation materials in building engineering.

Modeling the Hydrogen Effect on the Constitutive Response of a Low Carbon Steel in Cyclic Loading

Hydrogen-accelerated fatigue crack growth is a most severe manifestation of hydrogen embrittlement. A mechanistic and predictive model is still lacking partly due to the lack of a descriptive constitutive model of the hydrogen/material interaction at the macroscale under cyclic loading. Such a model could be used to assess the nature of the stress and strain fields in the neighborhood of a crack, a development that could potentially lead to the association of these fields with proper macroscopic parameters. Toward this goal, a constitutive model for cyclic response should be capable of capturing hardening or softening under cyclic straining or ratcheting under stress-controlled testing. In this work, we attempt a constitutive description by using data from uniaxial strain-controlled cyclic loading and stress-controlled ratcheting tests with a low carbon steel, Japanese Industrial Standard (JIS) SM490YB, conducted in air and 1 MPa H2 gas environment at room temperature. We explore the Chaboche constitutive model which is a nonlinear kinematic hardening model that was developed as an extension to the Frederick and Armstrong model, and propose an approach to calibrate the parameters involved. From the combined experimental data and the calibrated Chaboche model, we may conclude that hydrogen decreases the yield stress and the amount of cyclic hardening. On the other hand, hydrogen increases ratcheting, the rate of cyclic hardening, and promotes stronger recovery.

Pengaruh Konsentrasi Gliserol Dan Sorbitol Terhadap Karakteristik Daya Serap Air Edible Film Dari Pektin Kulit Pisang

ABSTRAK Penggunaan edible film menghasilkan limbah dan polusi yang lebih sedikit, namun karakteristiknya masih belum mendekati sifat kemasan sintetis. Salah satu karakteristik yang perlu diperbaiki adalah daya serap air/WVTR (Water Vapor Transmission Rate). Pada penelitian ini dilakukan studi literatur mengenai pengaruh jenis dan konsentrasi pemlastis (gliserol dan sorbitol) terhadap karakteristik WVTR edible film dari pektin kulit pisang. Literatur yang akan dikaji dalam penelitian ini dibatasi pada hasil penelitian terkait pembuatan edible film berbasis pektin kulit pisang serta menggunakan pemlastis gliserol dan sorbitol. Pada produk edible film yang dibuat menggunakan pemlastis dengan konsentrasi 10%, pemlastis sorbitol menghasilkan WVTR yang lebih rendah (3,66 g.H2O/jam.m2) dibandingkan dengan pemlastis gliserol (3,93 g.H2O/jam.m2). Dari kedua jenis pemlastis tersebut, konsentrasi yang memberikan nilai WVTR terendah (3,66 – 4,66 g.H2O/jam.m2) ada pada rentang 5-15%. Dari seluruh hasil penelitian yang dikaji, karakteristik WVTR produk edible film sudah memenuhi Japanese Industrial Standard (JIS Z 1707, 1975). Kata kunci: Edible film, pemlastis, daya serap air, pektin kulit pisang ABSTRACT The use of edible films results in less waste and pollution, but their properties are still not close to those of synthetic packaging. One of its properties that need to be improved is its water vapor transmission rate (WVTR). In this study, a literature study was carried out regarding the effect of plasticizers (glycerol and sorbitol) on WVTR of edible film from banana peel pectin. The literature being studied in this study is limited to the research related to edible film production based on banana peel pectin and using glycerol and sorbitol plasticizers. In the edible film which is made using a plasticizer with concentration 10%, sorbitol plasticizer produces the edible film with lower WVTR (3.66 g.H2O/hr.m2) compared to glycerol plasticizers (3.93 g.H2O/hr.m2). Of the two types of plasticizers, the concentrations that give the lowest WVTR values (3.66 – 4.66 g.H2O/hr.m2) ​​are in the range of 5-15%. From all the research results reviewed, the WVTR characteristics of edible film products have met the Japanese Industrial Standard (JIS Z 1707, 1975). Keywords: Edible film, plasticizer, water vapor transmission rate, banana peel pectin

Physical Properties of Edible Films from Pangasius catfish Bone Gelatin-Breadfruits Strach with Different Formulations

Abstract— This research aims to provide edible film made from fish bone gelatin of Pangasius catfish mixed breadfruit starch with different formulations. The study was carried out through three stages including breadfruit starch isolation, edible films fabrication and analysis of physical properties of resulted edible film such as thickness, water vapor transmission, tensile strength and percent of elongation as well as moisture content. Edible films which were formulated from fish bone gelatin of Pangasius catfish by breadfruit starch addition have thickness values ranged of ​​0.084-0.123 mm, 6.08 - 16.77% of moisture content, water vapor transmission of 1.07 - 1.60 g/ m²/hour, tensile strength of 0.245 - 1.186 MPa, and percent of elongation around 70 - 87.14%. The edible films from gelatin of Pangasius catfish bone with breadfruit starch addition have physical characteristic which fulfill the standard requirements issued by Japanese Industrial Standard (JIS) Keywords— edible film; biodegradable materials; fish gelatin;breadfruit starch; food packaging

Identifying best parameters of particleboard bonded with dextrin-based adhesives

The objective of this study was to evaluate the best parameters of particleboard manufacturing throughout the physical and mechanical properties’ test under Japanese Industrial Standard. Particleboard panels were manufactured from veneer waste of sengon wood (Paraserianthes moluccana) bonded with dextrin-based adhesives (DAs) and urea formaldehyde (UF) adhesives at the density target of 0.70 g/cm2 under various manufacturing parameters of adhesives composition, load pressure and pressure temperatures. The results showed that an increase in the value of physical and mechanical properties occurred on particleboards which were glued with DAs added with UF. As the addition of UF adhesive increases, the physical and mechanical properties of the particleboard also gradually increase. This confirms that a good bonding occurs when adding UF adhesives compared to using only dextrin. The particleboard manufacturing parameters demonstrated the best properties when 40% DA was mixed with 60% UF adhesives (DA–UF = 40:60 pbw; P12) for the physical test and 20% DA mixed with 80% UF (DA–UF = 20:80; P13) for the mechanical test for both particleboards under the load pressurized at 40 kgf/cm2 for 30 min at a temperature of 105°C.

Sifat Papan Partikel Bambu Petung (Dendrocalamus asper) dan Bambu Wulung (Gigantochloa atroviolacea) dengan Perlakuan Ekstraksi

Bambu memiliki kandungan ekstraktif dengan persentase yang berbeda antar jenis bambu. Penelitian ini bertujuan untuk mengetahui pengaruh perlakuan ekstraksi pada jenis bambu yang berbeda terhadap sifat papan partikel. Dua jenis bambu digunakan yaitu Bambu Petung (Dendrocalamus asper) dan Bambu Wulung (Gigantochloa atroviolacea). Perlakuan ekstraksi digunakan pada partikel bambu sebelum proses pembuatan papan partikel yaitu tanpa ekstraksi, ekstraksi air dingin dan ekstraksi air panas. Papan partikel dibuat dalam ukuran 25 cm x 25 cm x 0,7 cm, target kerapatan 0,9 g/cm3, jumlah asam sitrat 30%, serta kondisi pengempaan suhu 180°C selama 10 menit. Hasil penelitian menunjukkan bahwa interaksi perlakuan ekstraksi dan jenis bambu hanya berpengaruh signifikan pada sifat penyerapan air dan keteguhan rekat internal, sedangkan jenis bambu berpengaruh signifikan pada nilai kadar air, modulus patah dan modulus elastisitas. Semua papan partikel yang dihasilkan memenuhi standar Japanese Industrial Standard (JIS) A 5908 tipe 13. Pada penelitian ini, papan partikel dari bambu wulung tanpa perlakuan ekstraksi mempunyai nilai yang memenuhi standar tipe 18 dan berpotensi sebagai bahan baku untuk produk furnitur eksterior. Perlakuan ekstraksi dapat meningkatkan secara signifikan nilai keteguhan rekat internal papan partikel bambu petung, walaupun secara umum dengan jumlah asam sitrat 30% perlakuan tersebut tidak diperlukan pada papan partikel bambu Properties of Particleboard made from Petung Bamboo (Dendrocalamus asper) and Wulung Bamboo (Gigantochloa atroviolacea) Particles with Extraction TreatmentAbstractBamboo has extractives, which the percentage of extractive was different based on bamboo species. This research aimed to investigate the effect of extraction treatment at different bamboo species on the particleboard properties. Two types of bamboo were used, i.e. Petung bamboo (Dendrocalamus asper) and Wulung bamboo (Gigantochloa atroviolacea). Three extraction treatments were conducted to the bamboo particles before the particleboard manufacture, i.e. unextracted, cold-water extraction, and hot-waterextraction. The particleboard was made in the size of 25 cm x 25 cm x 0.7 cm, target density of 0.9 g/cm³, citric acid content of 30%, and pressing temperature of 180°C for 10 min. The results showed that the interaction between extraction treatment and bamboo species significantly affected on the water absorption and internal bond strength, however bamboo species affected significantly on the moisture content, modulus of rupture, and modulus of elasticity. All of particleboards could met the requirement of the 13 type of Japanese Industrial Standard (JIS) A 5908. In this research, particleboards made from wulung bamboo particles without extraction treatment have properties that met the requirement of the 18 type and the products have potential to be as exterior materials for furniture. In general, an extraction treatment was not an important step on the manufacturing of bamboo particleboard using citric acid 30% as adhesive. However, the extraction treatment could increase significantly the internal bond strength of particleboard made from petung bamboo.

Utilization of Cassava Maltodextrin for Eco-friendly Adhesive in the Manufacturing of Sorghum Bagasse Particleboard

The development of natural adhesives derived from non-fossil resources is very important for the future. This research aimed to develop natural adhesive from maltodextrin and compare it with other natural adhesives such as citric acid and malic acid for particleboard production. The effect of the adhesive raw materials on the physical and mechanical properties of the particleboards was investigated. The sweet sorghum and those natural adhesives were used in the manufacturing of particleboard. The resin content of the natural adhesive was 20 wt% base on air-dried particles. The dimension and density target of the boards were 30 x 30 x 0,9 cm3 and 0,8 g/cm3, respectively. The particleboards were prepared by hot pressing at 200°C for 10 min. The physical and mechanical properties of particleboards were evaluated based on Japanese Industrial Standard for particleboard (JIS A 5908-2003). The results showed that the density, moisture content, modulus of elasticity, and modulus of rupture met the requirements of the JIS A 5908-2003 standard, while the thickness swelling, water absorption, and internal bond did not meet the standard requirements. The results of FTIR analysis indicated the establishment of ester linkages due to the reaction between the natural adhesive and sorghum bagasse that contributed to the excellent physical and mechanical properties of the particleboard.Keywords: cassava, maltodextrin, natural adhesive, particleboard, sweet sorghum

Edible Film dari Tepung Kappa Karagenan dan Kitosan Cangkang Rajungan dengan Gliserol

Dampak dari penggunaan kemasan plastik dapat diminimalkan dengan alternatif bahan pengemas yang dapat dimakan, yaitu edible film. Edible film diaplikasikan pada bahan pangan karena sifatnya yang mudah larut dan berfungsi sebagai barrier sehingga dapat melindungi produk makanan. Edible film terbuat dari bahan yang dapat membentuk lapisan tipis seperti hidrokoloid serta campuran polimer dan plasticizer. Tujuan penelitian ini adalah membuat edible film dari campuran tepung kappa karagenan dan kitosan dari limbah cangkang rajungan dengan penambahan gliserol. Dalam penelitian ini, cangkang rajungan sebagai limbah dari industri pengolahan hasil laut dimanfaatkan sebagai kitosan. Pada uji kelarutan, edible film yang dihasilkan memiliki kelarutan lebih dari 50%, hasil ini menandakan bahwa edible film kitosan-karagenan dengan pemlastis gliserol ini baik untuk dikonsumsi. Kitosan dari cangkang rajungan yang dihasilkan dari penelitian ini memiliki sifat fisik berwarna putih sedikit kekuningan berbentuk butiran halus 100mesh dan memiliki Derajat Deasetilasi sebesar 61,24%. Edible film yang memenuhi karakteristik edible film dalam Japanese Industrial Standard (JIS) 1975 adalah pada formulisi kitosan-karagenan 0,2:1,8 dan 0,4:1,6. Rasio yang ideal antara kitosan-karagenan jika dilihat dari hasil ketiga jenis uji adalah pada rasio 0,4:1,6 dengan 2,5ml volume gliserol.

Quantification of Greenhouse Gas Emissions from Wood-Plastic Recycled Composite (WPRC) and Verification of the Effect of Reducing Emissions through Multiple Recycling

Wood-plastic recycled composite (WPRC) is a building material that uses certain amounts of recycled wood and/or plastic materials contained in wood-plastic composites. They are characterized by multiple recycling processes in which products that become post-consumer materials are technically able to be recycled to produce WPRC products. However, there is no research case that quantifies the effect of reducing greenhouse gas (GHG) emissions for the feature of multiple recycling. In this study, we quantified GHG emissions during the life cycle of WPRC that was manufactured by companies certified to the Japanese Industrial Standard (JIS) A 5741, using the life cycle assessment method. The following conclusions were revealed in this study. (1) The GHG emission of the targeted WPRC was 3489 kg-CO2e/t, and the emission rates from the WPRC production process and the combustion of WPRC waste were found to be particularly high. (2) It was found that setting the recycled material rate of plastic materials to 100% would reduce GHG emissions by 28% (1316 kg-CO2e/t) compared to when the recycled material rate was 0%. (3) It was also found that GHG emissions can be reduced by up to about 28% by multiple recycling of WPRC. It can be said that this study set a benchmark of GHG emissions for WPRC produced in Japan.