Judul: Effect of Lighting on Properties of Sea Grapes (Caulerpa racemosa) after Eight Days of Storage
Abstrak: Caulerpa racemosa merupakan rumput laut yang memiliki nilai ekonomis tinggi. Popularitasnya cenderung meningkat di negara-negara barat sebagai makanan fungsional yang baik untuk kesehatan dan kecantikan. Sifatnya yang rentan membuat C. racemosa membutuhkan penanganan khusus untuk menjaga mutunya. Penelitian ini menggunakan perlakuan pencahayaan yang berbeda (cahaya matahari, tanpa cahaya, lampu kuning, dan biru) sebagai treatment pasca panen selama penyimpanan C. racemosa. Perlakuan terpilih didapat pada pencahayaan lampu kuning, karena memiliki penyusutan bobot terkecil yaitu 34%. Perubahan morfologi C. racemosa yang diberi cahaya kuning lebih cepat lembek. Lapisan luar ramuli berupa membran yang isinya merupakan kompartemen kosong berisi tubuli spiral dan kloroplas. Kadar air setelah penyimpanan 8 hari turun 0,44%. Kandungan mineral natrium turun drastis, kalium dan kalsium tetap stabil. Nilai organoleptik menurun signifikan akibat peyimpanan (kenampakan 2,93±0,74; warna 3,00±0,74; aroma 2,60±0,62; rasa 2,47±0,63; tekstur 2,90±0,76).
Keyword: Caulerpa racemosa, desiccator, lamp, light, photosynthesis

Judul: Effect of Sea Grapes (Caulerpa lentillifera) Immersion Time in NaCl Solution on Organoleptic Quality and Antioxidant Activity
Abstrak: Anggur laut (Caulerpa lentillifera) memiliki kelemahan cepat mengalami kemunduran mutu. Perendaman anggur laut dalam larutan NaCl dapat memperpanjang tingkat kesegaran. Penelitian ini bertujuan menentukan pengaruh lama perendaman anggur laut dalam larutan NaCl terhadap mutu organoleptik, aktivitas antioksidan dan masa simpan. Perlakuan yang diberikan yaitu perendaman 0, 10, dan 20 menit. Pengamatan setiap 2 hari selama 10 hari terhadap morfologi, rendemen ekstrak, berat, diameter, organoleptik, senyawa bioaktif, dan IC50. Interaksi faktor perendaman dan penyimpanan tidak memengaruhi rendemen ekstrak dan kadar air. Perendaman kembali dengan air tawar mampu mengembalikan berat dan diameter anggur laut. Penerimaan panelis bertahan hingga hari ke-10 pada anggur laut yang direndam larutan NaCl, namun hanya bertahan hingga hari ke-6 pada anggur laut segar. Senyawa alkaloid, steroid, dan saponin hanya terdeteksi pada hari ke-0 dan tidak terdeteksi pada hari selanjutnya hingga hari ke-10. Nilai IC50 mengalami peningkatan hingga hari ke-10 pada seluruh perlakuan., Sea grapes (Caulerpa lentillifera) have the disadvantage which is quickly spoiled. Immersing sea grapes in NaCl solution can extend the freshness qualities. This study aims to determine the effect of sea grapes immersing time in NaCl solution on organoleptic quality, antioxidant activity, and storage time. The treatments given were immersion 0, 10, and 20 minutes. Observations every 2 days for 10 days on morphology, extract yield, weight, diameter, organoleptic, bioactive compounds, and IC50. The interaction of immersion and storage factors did not affect the extract yield and water content. Rehidration in fresh water is able to restore the weight and diameter of sea grapes. Acceptance of panelists lasted up to day 10th on sea grapes immersed in NaCl solution, but only lasted until day 6th on fresh sea grapes. Alkaloids, steroids, and saponins were only detected on day 0 and were not detected on the next day up to day 10th. The IC50 value has increased up to day 10th in all treatments.
Keyword: sea grapes, immersing time, NaCl solution, shelf life

Judul: Analisis Model Pandemik dan Prepandemik Avian Influenza pada Populasi Manusia
Abstrak: Avian influenza is a viral disease caused by a virus within the subtype of H5N1 in which its transmission caused by birds or human. In human population, transmission process of avian influenza is discussed in the model called: bird model, prepandemic model and pandemic model. The bird model has two equlibrium points. These are saddle disease free equilibrium and stable endemic equilibrium. The endemic equlibrium occurred when the reproduction number of avian influenza is greater than one. In the endemic equilibrium, avian influenza may infect both bird and human. The prepandemic model has two equilibrium points. These are avian influenza dominant equilibrium and human influenza dominant equilibrium. The human influenza dominant equilibrium occurred when the reproduction number of human influenza is greater than one. The pandemic model has one pandemic equlibrium. The human influenza pandemic occurred when the ratio of human influenza invasion, pandemic invasion and the reproduction number of human influenza is greater than one, respectively. The avian influenza pandemic occurred when the ratio of human influenza invasion, pandemic invasion is less than one and the reproduction number of avian influenza greater than one, respectively.
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