Judul: Pendugaan Produktivitas Tanaman Padi Pada Kondisi ENSO di Kabupaten Karawang (Studi Kasus: Kecamatan Rawamerta dan Tegalwaru).
Abstrak: Curah hujan di Indonesia dipengaruhi oleh aktivitas lautan dan atmosfer. Besarnya curah hujan berhubungan dengan terpenuhinya kebutuhan tanaman dalam proses pertumbuhan dan perkembangan sehingga mempengaruhi peningkatan maupun penurunan hasil produksi padi. Fenomena ENSO (El-Nino Southern Oscillation) memiliki andil yang besar dalam variabilitas curah hujan pada daerah Monsoon, khususnya di Kabupaten Karawang. Tujuan penelitian ini yaitu menganalisis curah hujan saat kondisi ENSO serta menduga produktivitas padi saat kondisi ENSO di Kecamatan Rawamerta dan Tegalwaru menggunakan model simulasi DSSAT (Decision Support System for Agrotechnology Transfer). Kondisi El-Nino tahun 2015 memiliki nilai tertinggi untuk total curah hujan selama empat bulan dibandingkan dengan kondisi Normal tahun 2012 dan La-Nina tahun 2010. Kondisi El-Nino tahun 2015 dan La-Nina tahun 2010 tidak terlalu mempengaruhi produksi padi selama setahun di Kabupaten Karawang, khususnya Kecamatan Rawamerta dan Tegalwaru. Frekuensi panen terendah (3 kali panen/tahun) terjadi pada kondisi Normal tahun 2012 pada Kecamatan Rawamerta dengan rata-rata produktivitas hasil simulasi sebesar 6283 kg/ha, sedangkan frekuensi panen tertinggi (6 kali panen/tahun) terjadi pada kondisi El-Nino tahun 2015 pada Kecamatan Rawamerta dengan rata-rata produktivitas hasil simulasi sebesar 6675.8 kg/ha.
Keyword: DSSAT, ENSO, NASA POWER

Judul: Analisis Dampak ENSO (El-Nino Southern Oscillation) Terhadap Tingkat Kekeringan Untuk Tanaman Pangan dan Palawija (Studi Kasus : Sulawesi Selatan)
Abstrak: Climate and weather variability is a condition of long-term climate change is marked by fluctuations and deviations from normal conditions. One reason is the ENSO (El-Nino Southern Oscillation) which affects the drought. This research was conducted with the aim to determine and analyze the level of drought in South Sulawesi due to the influence of ENSO and compare the production of food crops and crops in a normal year and ENSO. Drought index is calculated based on the Palmer method by using rainfall data, air temperature and soil humidity as inputs. Based on the drought index calculated using the Palmer method, areas with monsoon rain patterns have a range of values between -22.71 to dryness 18.23, equatorial patterns ranged from -4.03 to 5.07, and the local patterns ranged from -8.57 to 10.07. Verification test results of the drought index of crop production data show that each ENSO event is always followed by a decline in rice production, especially of rice fields. As for crops, crop production generally tended to increase in every ENSO event because most crops are plants that are resistant to drought, particularly local varieties that have adapted well to its environment. Thus, the influence of ENSO drought can affect the production of food crops and crops.
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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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