Judul: Tidal chart and tidal propagation pattern in the Indonesian Seas
Abstrak: Understanding of the tidal phenomenon could support in management of resources. Since the tidal pattern is different for each region, it needs to be presented in an informative media like tidal chart, showing an information co-tide, corange, and tidal type contours. This study aims to investigate tidal wave propagation, distribution of major tidal harmonic constants, and areas that have the same tidal type Indonesia waters. The major tidal harmonic constants data (M2, S2, N2, K2, K1, O1, were obtained from Indonesian Naval Hydrographic Office (Dishidros TNI AL). method used to interpolate values of major tidal harmonic constants is spline interpolation. Software implemented to create contour is terramodel. The results that the semidiurnal tidal wave propagate mainly from the Indian Ocean into Indonesian seas through Malacca Strait, Sunda Strait, Lombok Strait, Sawu Arafura Sea. Contours of tidal constants in shallow waters are more tightly that in the deep waters, from Natuna Sea to Bangka Belitung waters there exists types: diurnal, mixed tide prevailling diurnal, mixed tide prevailling semidiurnal, and semidiurnal. However, in general tidal type in Indonesia waters is dominated by mixed prevailling semidiurnal, because it is situated between the Indian and Pacific where mixed tide prevailing semidiurnal type is dominant.
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Judul: Pengembangan Perangkat Lunak Antarmuka Instrumen Motiwali (Tide Gauge) untuk Analisis Data Pasang Surut
Abstrak: MOTIWALI is a water level instrument based on acoustic that has been created at the Marine Instrumentation Laboratory of ITK-IPB. The data recording need detail analyze by a program to detemine constituent of tide characteristicc. The objective this study is developing interface program (software) for tidal analisys with Admiralty methode. This Admiralty-based method program computes 9 tidal constituents, determines Formzahl tidal types, and predicts tidal time-series for particular time-length. The Matlab-based program scripts consist of four modules: the pre-processing module for parsing, filtering and data averaging; the Admiralty module for tidal constituents analysis, the Formzahl module for tidal types determination; and prediction module for tidal prediction. The 15-day sea-surface elevation time series data from Pramuka Island - Seribu Islands Jakarta have been used to examine the performance of the software. The result shows that the amplitude and phase difference obtained from this software and Dishidros tidal table (also with least-squared t-tide method) was very small (RMSE: 1.89 cm and 102°). This means that accuracy of calculation are quite consistent. Furthermore, diurnal tidal type (Formzahl number, F=4.43) obtained from this analysis was in good agreement with previous studies. Tidal prediction module provides beneficial information for marine activities around the region.
Keyword: Seribu Islands Jakarta, tidal constituents, Admiralty method, interface software, MOTIWAL

Judul: Produksi dan Karakteristik Lisozim Kering Beku dari Putih Telur Ayam Kampung
Abstrak: Lisozim putih telur adalah satu protein putih telur dengan persentase sebesar 3%-4% dari berat total protein. Protein ini memiliki banyak kegunaan dalam industri makanan. Lisozim dikenal sebagai bahan pengawet dan sedang banyak diteliti sebagai pemanis. Penelitian ini bertujuan untuk menganalisis lisozim kering beku asal putih telur ayam kampung dari aspek berat lisozim, rendemen, dan kadar protein hasil perlakuan (native/ tanpa pemanasan, pasteurisasi pada suhu 72oC selama 15 detik, dan sterilisasi pada suhu 121 oC selama 15 menit). Lisozim putih telur dari ayam kampung dimurnikan sebanyak 500 g putih telur menjadi kering beku. Hasil penelitian menunjukkan bahwa hasil kering beku untuk berat molekul ayam kampung pada perlakuan tanpa pemanasan, pasteurisasi, dan sterilisasi berturut-turut adalah 15 kDa, 15 kDa, dan 0 kDa. Rendemen terhadap putih telur sebesar 0.02%. Konsentrasi protein lisozim kering beku, semakin menurun dengan makin tingginya suhu perlakuan, berturut-turut sebesar 19.54 mg mL-1, 5.07 mg mL-1, dan 1.32 mg mL-1. Produksi lisozim menjadi kering beku tidak mengakibatkan perubahan penurunan kualitas protein lisozim, tetapi pemanasan pada lisozim kering beku ayam kampung berpengaruh terhadap konsentrasi protein, berat molekul dan karakteristik lisozim. Pemanasan mengakibatkan terjadinya penurunan berat molekul masing-masing sampel dan menunjukkan bahwa pemanasan tinggi mengakibatkan lisozim terdenaturasi menjadi tidak aktif.
Keyword: freeze dried, heating, kampung chicken, lysozyme