Judul: Properties of Particle Board Made from Corn Husk: The Effect of Various Board Density and Water Chitosan Soluble Chitosan Adhesive Concentration
Abstrak: Kelobot jagung merupakan biomassa dari jagung yang potensial sebagai bahan baku untuk pembuatan papan partikel. Tujuan penelitian ini adalah mengetahui pengaruh variasi kerapatan papan dan kadar perekat kitosan larut air terhadap karakteristik papan partikel dari kelobot jagung. Papan partikel dibuat dalam tiga target kerapatan: 0,6 g/cm3, 0,8 g/cm3 & g/cm3 dengan kadar perekat kitosan larut air: 6%, 8%, & 10%. Papan partikel diproduksi menggunakan kempa panas dengan suhu kempa 180C dan tekanan kempa 25 kgf/cm2 selama 15 menit. Hasil penelitian menunjukkan bahwa nilai koefisien absorpsi suara (α) berkisar antara -0,064 hingga 0,112 untuk seluruh frekuensi (500-3000 Hz), kerapatan papan 0,51-1,02 g/cm3, kadar air 6,11-9,89%, pengembangan tebal 121,99-152,99%, daya serap air 261,44-364,95%, MOE 171,33-9045 kgf/cm2, MOR 7,95-112,59 kgf/cm2, IB 0,05-0,98 kgf/cm2, dan SHP 2,63-12,49 kgf. Secara keseluruhan, parameter koefisien absorpsi suara (α) papan belum memenuhi standar ISO 11654. Parameter kerapatan, kadar air dan MOR memenuhi standar JIS A 5908: 2003 untuk kerapatan papan 1 g/cm3. Secara keseluruhan, papan partikel dengan kerapatan papan 0,8 g/cm3 dan kadar perekat kitosan larut air 8% memberikan karakteristik papan partikel terbaik., Corn husk extracted from maize was considered as the potential material for manufactured particleboard. The purpose of this study was to evaluate the influence of variations in board density and water-soluble chitosan concentration on the properties of corn husks particleboard. Particleboards were made in three different density targets of 0.6 g/cm3, 0.8 g/cm3 & 1 g/cm3 with water-soluble chitosan adhesive concentration of 6%, 8%, & 10%. The particleboard was manufactured using a hydraulic hot press with a pressing temperature of 180°C and a pressing pressure of 25 kgf/cm2 for 15 minutes. The results showed that sound absorption coefficient (α) value ranges from -0.064 to 0.112 for all frequencies (500-3000 Hz), density 0.51-1.02 g/cm3, moisture content 6.11-9.89%, thickness swelling 121.99-152.99%, water absorption 261.44-364.95%, MOE 171.33-9045 kgf/cm2, MOR 7.95-112.59 kgf/cm2, IB 0.05-0, 98 kgf/cm2, and SHP 2.63-12.49 kgf. The sound absorption coefficient of the particleboard didn’t fulfil the requirement of ISO 11654. Density, moisture content, and MOR of the particleboard with density 1 g/cm3 fulfilled requirement JIS A 5908: 2003. Overall, the particleboard with a board density of 0,8 g/cm3 and an adhesive content of 8% water-soluble chitosan gave the best particleboard properties.
Keyword: kelobot jagung, kitosan larut air, koefisien absorpsi suara, papan partikel

Judul: Characteristics of Water Soluble Chitosan and Citric Acid Adhesive Corn Husk Particle Board: The Effect of Board Density and Thickness
Abstrak: Keterbatasan bahan baku industri perkayuan mendorong pemanfaatan material berlignoselulosa, kelobot jagung sebagai bahan pengganti kayu, seperti papan partikel. Penelitian ini bertujuan mengetahui pengaruh variasi kerapatan dan ketebalan terhadap sifat fisik, mekanik, akustik, dan termal papan partikel dengan perekat campuran kitosan larut air dan asam sitrat 15%. Papan memiliki variasi kerapatan (0,6 dan 0,8 g/cm3) dan variasi ketebalan (3, 6, dan 9 mm). Ukuran partikel kelobot jagung 4-14 mesh. Papan berukuran 25×25 cm diproduksi menggunakan kempa panas dengan suhu 180°C dan tekanan 5 MPa (3 mm) dan 10 MPa (6 dan 9 mm) selama 15 menit. Hasil uji kerapatan sebesar 0,65-0,84 g/cm3, kadar air 3,14-13,04%, pengembangan tebal 59,08-113,92%, daya serap air 78,18-180,74%, MOE 4029-7005 kgf/cm2, MOR 53-146 kgf/cm2, IB 0,71-6,67 kgf/cm2, SHP 42,34-103,44 kgf. Koefisien absorpsi suara (α) pada uji akustik sudah memenuhi standar ISO 11654 dan termasuk ke dalam kelas D untuk serapan normal. Papan partikel bersifat isolator panas dengan nilai KT 0,16-0,21 W/m.K. Uji wettability papan bersifat hidrofilik dengan sudut kontak 65°-89°. Variasi papan partikel kerapatan 0,8 g/cm3 dan ketebalan 6 mm menghasilkan kualitas terbaik sesuai standar SNI 03-2105-2006., The limited raw materials of the wood industry encourage the use of lignocellulose materials, corn husk as a substitute for wood, such as particle board. This study aims to determine the effect of density and thickness variations on the physical, mechanical, acoustic, and thermal properties of particle board with a mixture 15% of water soluble chitosan and citric acid. Boards have density variations (0.6 and 0.8 g/cm3) and thickness variations (3, 6, and 9 mm). The particle size of corn husk is 4-14 mesh. The 25×25 cm board is manufactured using a hydraulic hot press with a temperature of 180°C and pressures of 5 MPa (3 mm) and 10 MPa (6 and 9 mm) for 15 minutes. Test results of density 0.65-0.84 g/cm3, moisture content 3.14-13.04%, thickness swelling 59.08-113.92%, water absorption 78.18-180.74%, MOE 4029-7005 kgf/cm2, MOR 53-146 kgf/cm2, IB 0.71-6.67 kgf/cm2, SHP 42.34-103.44 kgf. The sound absorption coefficient (α) in the acoustic test has fulfilled the requirement of ISO 11654 standards and is included in class D for normal absorption. Particle board is a heat insulator with a KT value of 0.16-0.21 W/m.K. The board wettability test is hydrophilic with a contact angle of 65°-89°. Particle board variations of 0.8 g/cm3 density and 6 mm thickness produce the best quality according to SNI 03-2105-2006 standards.
Keyword: citric acid, corn husk, water soluble chitosan, particle board

Judul: Infeksi Cacing Jantung Dirofilaria Immitis, Railliet & Henry, 1911 Pada Anjing
Abstrak: Cacing Dirofilaria immitis dewasa yang tinggal dalm ventrikel kanan jantung anjing, sering kali menimbulkan gejala klinis yang cukup berat. Cacing Tersebut menghasilkan mikrofilaria yang selanjutnya berkembang menjadi larva infektif dalam saluran malphigi induk semang entara, yaitu nyamuk dari genus Culex, Aedes dan Anopheles.
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