Judul: Rancang Bangun dan Pengujian Balon Udara Panas Alat Penyemprot Padi Tipe Balon.
Abstrak: The objective of this research was to design an airship and conduct the performance test. The design was refered to The Standard Atmosphere (ISA) and The Royal Aeronautical Society for determination of airship’s dimensions. Analysis resulted the dimensional volume, lenght, and diameter were 40 m3, 10.8 m, dan 2.7 m respectively. Analysis of the frame has shown the value τ = 0.13 kg/mm2 < τallowed dan σ = 0.044 kg/mm2 < σallowed, and efficiency of the rivet’s joint was 50 %. The performance test shows the hot air (93.4 oC and 57.3 oC) can be lifted the load up to 3.8 kg. Based on the results it was not feasible in accordance with the plan that can be lifted 10 kg. Balloon with volume 105.3 m3 could lift the load 10 kg.
Keyword: Airship, hot air ballon, sprayer balloon type

Judul: Rancang Bangun dan Pengujian Unit Penyemprot pada Alat : Penyemprot Padi Tipe Balon
Abstrak: Spraying of fertilizers and pesticides on rice field is one of important maintenance activities for rice crop cultivation. Usually this activity is done in the morning because the wind conditions which allow the fertilizers or pesticides to be uniformly spread to field and to avoid drift. The activity is generally carried out manually by farmers using knapsack sprayer and the farmer had to walk between rice plant, which is laborious and can damage the planting furrow. Spraying application using tractor could not be done because of the condition of rice field, where almost field haven’t hardpan. These problems can be overcome by aerial spraying using air planes. The use of plane for spraying has some drawback such as high cost and safety related to ground condition. Another possible solution is to use a balloon equipped by control system and sprayer system for liquid fertilizer or pesticide application. Control system adopted the multi copter with flying board and for spraying systems adopted the electric sprayer. Spraying system used an electric pump for distribute the fertilizer or pesticide. Washer pump used for this prototype, the washer pump can produce a debit 1.20 l/min. The system created can do the spraying area 2.52 m2 per second equal to 0.91 ha/hour when the velocity 4.17 km/hour.
Keyword: Bogor Agricultural University (IPB), paddy sprayer, electric sprayer, balloon type sprayer, aerial spraying

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%.
Keyword: