Judul: Tingkat Risiko Musculoskeletal Disorders (MSDs) Pada Penebangan Pohon Jati: Analisis REBA dan RULA
Abstrak: Penebangan pohon jati di Indonesia menggunakan chainsaw masih didominasi dengan sistem munual material handling. Kegiatan dengan sistem ini memiliki tingkat risiko musculoskeletal disorders (MSDs) yang tinggi akibat disertai beban chainsaw yang berat dan postur tubuh janggal/ekstrem pada operator. Diperlukan tindakan untuk mengurangi risiko MSDs dalam kegiatan penebangan jati dengan analisis postur kerja ekstrem yang efektif dan aksi ergonomi. Penilaian risiko MSDs dilakukan menggunakan instrumen Rapid Entire Body Assessment (REBA) dan Rapid Upper Limb Assessment (RULA). Hasil analisis postur kerja menggunakan metode REBA memiliki tingkat risiko MSDs yang bervariasi daripada RULA yang secara keseluruhan kegiatan penebangan jati berisiko ergonomi sangat tinggi. Sehingga penilaian postur kerja pada kegiatan penebangan pohon jati, instrumen RULA lebih disarankan karena sensitivitas yang dimiliki lebih tinggi daripada REBA. Adapun aksi ergonomi untuk mengurangi risiko pada postur kerja operator chainsaw berupa perbaikan postur dengan menghindari postur membungkuk dan mengganti dengan postur berlutut, menggunakan alat chainsaw dengan beban yang lebih ringan dan pemeliharaan alat yang baik, serta adanya penambahan durasi istirahat operator untuk relaksasi otot tubuh., The felling of teak trees in Indonesia using chainsaws is still dominated by the munual material handling system. Activities with this system have a high level of risk of musculoskeletal disorders (MSDs) due to heavy chainsaw loads and awkward/extreme postures for operators. Action is needed to reduce the risk of MSDs in teak felling activities by analysing effective extreme work postures and ergonomic actions. MSDs risk assessment is carried out using Rapid Entire Body Assessment (REBA) and Rapid Upper Limb Assessment (RULA) instruments. The results of work posture analysis using the REBA method have varying levels of MSDs risk than RULA, which overall teak logging activities are very high ergonomic risk. So that the assessment of work postures in teak logging activities, the RULA instrument is more recommended because of its higher sensitivity than REBA. As for ergonomic actions to reduce the risk in the work posture of chainsaw operators in the form of posture improvement by avoiding slouching postures and replacing them with kneeling postures, using chainsaw tools with lighter loads and good tool maintenance, and increasing the duration of operator breaks for relaxation of body muscles.
Keyword: MSDs, REBA, RULA, teak felling, work posture

Judul: Risk of Work Posture of Teak Delimbing Operator Using  Chainsaw with REBA and RULA Analysis Methods
Abstrak: Pembersihan batang jati di Indonesia masih dilakukan secara motor-manual menggunakan chainsaw yang berat. Beban chainsaw yang berat dan kondisi batang yang dibersihkan dapat memicu terjadinya postur kerja ekstrem. Diperlukan analisis terhadap berbagai macam postur kerja ekstrem pada pembersihan batang jati untuk mengetahui risikonya bagi kesehatan otot operator chainsaw. Postur kerja ekstrem didapatkan dari hasil analisis Range of Motion yang kemudian akan dianalisis risiko postur kerja statisnya menggunakan metode Rapid Entire Body Assessment (REBA) dan Rapid Upper Limb Assessment (RULA). Postur kerja ekstrem yang dianalisis menggunakan metode REBA menunjukkan risiko kesehatan otot sedang hingga tinggi. Hasil analisis menggunakan metode RULA menunjukkan hampir seluruh postur yang dianalisis berisiko tinggi. Postur berdiri tegak dengan letak chainsaw yang tidak terlalu tinggi terbukti memiliki risiko yang lebih rendah. Upaya yang dapat dilakukan untuk mengurangi risiko pada postur kerja operator chainsaw dapat berupa perbaikan postur dengan menghindari postur membungkuk, pengurangan beban angkat dengan menggunakan chainsaw yang lebih ringan, dan penambahan waktu istirahat bagi otot tubuh., Teak delimbing in Indonesia is still done manually using a heavy chainsaw. Heavy chainsaw loads and the condition of the trunk being cleaned can lead to extreme work postures. An analysis of various extreme work postures in teak delimbing is needed to determine the risks to the health of the chainsaw operator's muscles. Extreme work postures are obtained from the Range of Motion analysis which will then be analyzed for the risk of static work postures using Rapid Entire Body Assessment (REBA) and Rapid Upper Limb Assessment (RULA) methods. The extreme work postures analyzed using the REBA method indicate a moderate to high muscle health risk. The results of the analysis using the RULA method show that almost all of the analyzed postures are high risk. An upright posture with a chainsaw that is not too high has been shown to have a lower risk. Efforts that can be made to reduce the risk in the chainsaw operator's work posture can be in the form of improving posture by avoiding a slouching posture, reducing lifting loads by using lighter chainsaw, and increasing rest time for the body's muscles.
Keyword: Analisis, postur kerja, REBA, risiko, RULA

Judul: Purifikasi Dan Karakterisasi Imunoglobulin Y (IgY) Pada Telur Ayam Kampung
Abstrak: The objective of this research was to purified and characterized yolk immunoglobulin (IgY) from Indonesian native chicken eggs. Fourty eggs were collected from Cibanteng, Ciampea, Cinangneng, and Darmaga. IgY from egg yolk were puri$ed with Water Soluble Fraction (WSF) method combinated by 12% PEG 6000 and 40% Amonium sulpha methodt. IgY molecular weight was established by SDS-PAGE and the concentration was determinated by UV specfrophotometer. The result show that average IgY concentration from native chicken eggs was 7.86 mngml. Molecular weight of native chicken IgY was 180 and I70 kDa..
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