Judul: Analisis ergonomi pada penyiapan lahan sawah lebak menggunakan alat tradisional tajak di Kabupaten Banjar Kalimantan Selatan
Abstrak: Marshland field in South Kalimantan is one of potential new source of paddy field area. Regarding marginal characteristics of teh field however, there are some obstacles need to be overcame related to farm work activities, especially land preparation activity. Traditional local farmers in South Kalimantan conventionally do the field preparation by using a traditional tool named “tajak”. This typical traditional tool is very appropriate for land preparation in marshland field which is enabling to cultivate without raising the pirit (FeS2) layer. However, it is quite difficult, hard and dangerous to operate tajak, and it’s difficult to learn by a novis operator as well. Therefore, ergonomics study will be beneficial to develop more convenient, safe and effective tajak. This study focused in workload and human-tool suitability analyses. Workload analysis was conducted based on heart rate (HR) parameter,while human tool suitability analysis was conducted based on anthropometri and motion study. The result of workload analysis revealed that tajak operation is an “extremey hard” workload, whichs the avarage of IRHR is 2,14. The workload level of tajak operation is indicatively by workload intencity and swing elevation. Regarding the Total energy cost per weight (TEC’) and hours of work (JOK) , the tajak operation consumes 5,36 kcal/kg.hour and need 61.07 hour/ha in average. Anthropometri and motion study analysed revealed that the dimentional suitability of tajak tool is strongly related to shoulders and waist heightly, arms length, and hands grips diameter. Based on the result of tajak anthropometri and motion analyses, for better design of tajak’s handle was recommended 75.70 cm
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Judul: Desain Konseptual Knapsack Sprayer untuk Budidaya Kelapa Sawit melalui Pendekatan Ergonomi.
Abstrak: Designing a tool/machine needs ergonomics aprroach in order to match between man-machine system. One of the important tools in oil palm cultivation is knapsack sprayer. This study was conducted in aiming to understand risk occupational knapsack sprayer operation. So, ergonomic analysis is needed for these activities to understand the need of intervention to reduce the risks of working and complaints that occur. Based on Nordic Body Map questionnaire, the operator of knapsack sprayer suffered muscular fatigue and pain on the leg (28%), the left upper arm (27%) and the neck (14%). Based on the Range of Motion’s criteria, dangerous zone (Zone 3) were identified on hip flexion, shoulder flexion and neck flexion. Futhermore, REBA method was applied to evaluate the work posture in detail. The REBA revealed that score of 8 or more were resulted on “Loading”, “Pumping”, and “Spraying” work elements. These mean that the work element were high level of MSD’s risk, thus changing in the working condition is needed soon. Workload analysis found that 17 kg of total weight knapsack sprayer with the dimension of knapsack sprayer’s tank is (390 x 171 x 534) mm and pump lever length is 720 mm. Recomamanded resting time for knapsack sprayer operator is 125 minutes for 4 hours efective working time.
Keyword: knapsack sprayer, nordic, REBA, ROM

Judul: Sintesis dan Pencirian Kompleks Fe(III)-Kuersetin
Abstrak: Quercetin belongs to flavonols which is able to chelate metal ions. Quercetin may chelate metal ions at 3’,4’-catechol, 3- or 5-hydroxycromone sites. In this study, quercetin was complexed with Fe(III). The complex with Fe(III) ions from FeCl3·6H2O was more stable than the complex derived from Fe(NO3)3·9H2O. The quercetin was yellow in color and showed maximum wavelengths (λ􀭫􀭟􀭶) at 250 and 370 nm. The Fe(III)-quercetin complex from Fe(NO3)3·9H2O was yellowish green with 􀟣􀭫􀭟􀭶 at 280 and 420 nm, whereas that from FeCl3·6H2O was dark green with 􀟣􀭫􀭟􀭶 at 280 and 430 nm. The 􀟣􀭫􀭟􀭶 shift indicated that the complex was formed at 3-hydroxychromone site. The Fe(III)- quercetin complex was formed with 1:1 metal-ligand mole ratio based on atomic absorption spectrophotometry analysis and the X-ray diffractogram showed that the crystallinity of the complex was 37%.
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