Judul: Kajian Minimasi Biaya Produksi Stay Assy IAMI (Isuzu Astra Motor Indonesia) Pada PT. BS Indonesia
Abstrak: Agregat planning for linear programing uses fixed work forced assuming that there is no decrease or increase in the number of employees. Production rate can fluctuate due to overtime only with fluctuate. The appropiate method of demand dorecasting is the moving average method.The existing obstacles in the preparation of production optimizing system at PT. BS Indonesia among others are the total production, production rate, working hours of reguar worker and overtime. These parameters give a big influence on reaching the company is goal which is minimizing cost. Based on the comparison of the production planning method, production planning is 15% of the predicted demand and the researching result of the linear production programing plan which resulting a far more lower Stay Assy Isuzu Astra Motor Indonesia (IAMI) total cost which was Rp. 2.121.109.794 and Rp. 2.129.106.192, if it was compared to the production plan that the company working based on 15% data from the past demand that was as bis as Rp. 2.134.246.008.
Keyword: optimum., linear programing, agregat planning

Judul: Analisis Perencanaan dan Pengendalian Persediaan Bahan Baku Produk Stay Assy TD pada PT BS Indonesia
Abstrak: Some Companies often having difficulties in Planning and Inventory, even from the start raw material inventory till becoming finished goods. In order to solve the problems, company needs a good planning so the product activity could run well consistently. The aim of this research is in order to know about Stay Assy TD Planning and Inventory Raw Material Controlling with MRP (Material Requirement Planning) and to decide the correct MRP Method as the correct lowest cost alternative. Planning and Inventory Controlling used by MRP Method for Stay Assy TD using FIFO (First In First Out) Method. With main specific raw material for assembling stay powder coating, bracket CED, washer, spring and ball bearing. Planning for material needs using MRP based on customer needs estimation in order to fill future raw material needs. The estimation using winters method. The estimation could be seen from the least MAPE (Mean Absolute Percentage of Error). By using MRP technique with PPB (part period balancing) for stay powder coating, bracket CED, Spring and ball bearing material could spend the lowest cost. And MRP Technique with EOQ (Economic Order Quantity) is used for Washer raw material.
Keyword: PPB., LFL, MRP Technique with EOQ, Winters Estimation

Judul: Isolasi senyawa golongan flavonoid sebagai antioksidan dari daun dandang gendis (Clinacanthus nutans)
Abstrak: The leaves of dandang gendis (Clinacanthus nutans) exhibit antioxidant activity. The objective of this study is to investigate the highest antioxidant activity from flavonoid extract of the leaves. Antioxidant activities were determined by radical scavenging assay using 1,1-diphenyl-1-pycryl-hydrazyl radical. The result showed that ethyl acetate extract had antioxidant activity with IC50 value of 178.40 mg L-1. The ethyl acetate extract was fractionated further using preparative thin layer chromatography with eluent of n-buthanol:acetic acid: water (4:1:5) and produced 3 fractions. The most active fraction was fraction 2 with IC50 value of 52.93 mg L-1, which was lower than that of butylated hydroxy toluene (IC50 16.71 mg L-1). Flavonoid assay of fraction 2 showed that it contained flavonol and flavon. The ultraviolet-visible spectrum of fraction 2 in methanol solvent showed a maximum absorption at 332 in band 1 and 274 nm in band 2. In MeOH+MeONa and MeOH+AlCl3-HCl solvents there was a bathochromic shift, indicated the presence of 4'-OH and 5-OH. The new peak at 326.5 nm showed the presence of 7-OH substituent.
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