Judul: Karakterisasi Glikoprotein Ampas Ekstrak Air Ganoderma lucidum
Abstrak: Semakin meningkatnya pengguna makanan suplemen ekstrak air Ganoderlllo lucidulIl, membawa dampak bagi peningkatan jumlah ampas yang dihasilkannya. Sementara tersisa berbagai senyawa metabolit primer dan sekunder dalam ampas yang tidak terekstraksi oleh air yang kemungkinan masih memiliki aktivitas dan dapat dimanfaatkan. Dalmn peneiitian ini,. Jmndungan sisa glikoprotcin dari ampas dicoba diisolasi dcngcm tiga pengekstraksi berbeda (aseton teknis, etanol 80%, NaCl 0,15 M) untuk melihat pcngaruh pengekstraksi terhadap rendcmen yang dihasilkannya, kemudian rendemen dengan kandungan protein dan gula terbesar dimurnikan (Sephadex G-lOO, DEAE-Selulosa) dan dikarakterisasi (kromatografi cair kinerja tinggi, elektroforesis).
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Judul: Penapisan Metabolit Sekunder Pada Limbah Ekstrak Air Tubuh Buah Ganoderma lucidum Dengan Uji Hayati Larva Udang (Artemia salina Leach.)
Abstrak: Penelitian mengenai jamur yang dapat digunakan sebagai ohat terus meningkat. Saat ini telah banyak dilakukan isolasi dan uji hayati senyawa bioaktif dari sumber daya hayati tertentu. Pemanfaatan jamur berpotensi obat ini bahkan telah digunakan dalam skala industri, salah satunya adalah Ganoderma Illeidum. Ekstraksi dalam jumlah besar ini telah menghasilkan limbah G, lucidum. Limbah yang dimaksud adalah limbah ekstrak air tubuh buah G. lucidllm. Dalam penelitian ini dilakukan ekstraksi, pemisahan, dan pengamatan terhadap potensi bioaktivitas dari limbah ekstrak air tubuh buah G. luciduJ11. Pengamatan potensi bioaktivitas didasarkan pada LC50 menggunakan larva udang (Artemia salina Leach.). Alkaloid diekstraksi dengan metanol, diasamkan dengan a5am asetat 5% sampai pH 3-4, lalu diekstraksi dengan eter. Lapisan air dibasakan dengan penambahan amonium hidroksida sampai pH 8-9 selanjutnya diekstraksi dengan klorofom1. Terpenoid diekstraksi dengan metanol 90%, dibasakan dengan natrium karbonat 5% sampai pH 9, lalu diekstraksi dengan kloroform. Lapisan air diasamkan dengan dengan asam suI fat 4 N sampai pH 2 selanjutnya diekstraksi dengan kloroform. Flavonoid diekstraksi dengan diklorometana. Ekstrak flavonoid dipisahkan lebih lanjut dengan kromatografi kolom silika gel 60 dengan elusi bergradien (heksano, heksana-kloroform, kloroform, kloroform-etil asetat, etil asetat, etil asetat-metanol, dan metanol).
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Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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