Judul: Pengaruh Keragaman Iklim terhadap Produksi Susu Sapi Perah Fries Holland (Studi Kasus: UPTD BPT SP & HMT Cikole)
Abstrak: Rainfall variability during dry and rainy season affect variation in milk production at UPTD BPT SP & HMT Cikole in Lembang, West Java. Milk production rate during the dry season is higher compared to the rainy season. This is due to the quality of food consumed by the cows during the dry season is better than the rainy season. Analysis between rainfall data and milk production using linear regression analysis produces a relatively strong relationship shown by determination coefficient equal to 0,919, showing that the rainfall variability explains more than 90% of milk production. Distribution and variability of rainfall in Indonesia is influenced by El Nino Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) event, where both phenomena can be identified by using Ocean Nino Index (ONI) and Dipole Mode Index (DMI), respectively. Compared to DMI, ONI has a stronger relationship withrainfall and milk production at UPTD BPT SP & HMT Cikole, Lembang. ONI can be used to predict milk production in the rainy season and the dry season with a time lag of three months. The prediction model for milk production in the dry season is developed by using milk production data in JJA and rainfall data in MAM. For the rainy season, the prediction model uses pair of milk production data in DJF and rainfall data in SON.The relationship between seasonal ONI and milk production indicate a quadratic pattern, with a coefficient of determination around 92.8% and 34.3% in the rainy and dry season, respectively.
Keyword: Rainfall, ONI, DMI, Milk Production, Cow Fries Holland

Judul: Pengaruh Perbedaan Iklim dan Manajemen Terhadap Produksi Susu sapi Friesian Holstein pada Musim Hujan di Jawa Barat dan Jawa Timur
Abstrak: Penelitian ini bertujuan untuk mempelajari hubungan antara produksi susu (jumlah dan kualitas) terhadap sistem manajemen, konsumsi pakan, THI, curah hujan, dan kecepatan angin, mengetahui pada wilayah iklim mana sapi dapat berproduksi optimal, dan membandingkan produksi susu pada wilayah iklim yang berbeda dengan sistem manajemen yang berbeda (perusahaan dan peternakan rakyat). Penelitian dilaksanakan bulan Januari- April 1992 di Jawa Barat: Cileubut (190 m dpl), Ujung Berung (720 m dpl), Pangalengan (1450 m dpl) dan di Jawa Timur: Grati (45 m dpl), Dau (600 m dpl), Nongkojajar (1250 m dpl). Pengamatan produksi dilakukan dua kali sehari, konsumsi TDN dihitung untuk jumlah sehari. Kadar lemak dan berat jenis susu di uji untuk setiap sampel. Iklim mikro kandang yang diukur adalah suhu dan kelembaban udara, sedangkan iklim makro adalah kecepatan angin, suhu dan kelembaban udara. Data curah hujan diambil dari stasiun meteorologi di setiap daerah penelitian. Pengaruh perbedaan daerah, ketinggian, sistem manajemen, dan waktu pengamatan terhadap produksi susu, konsumsi TDN, kadar lemak, dan berat jenis susu dianalaisa dengan rancangan fak- torial. Hubungan antara produksi susu dengan sistem manajemen, konsumsi TDN, dan faktor biometeorologi dianalisa dengan regresi berganda...
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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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