Judul: Studi penentuan komposisi optimal agar kertas, ekstrak bekatul dan ekstrak protein syaraf sebagai media kultur misella murni jamur merang serta waktu inkubasinya
Abstrak: Jamur merang adalah jenis jamur yang paling populer di Indonesia serta mempunyai potensi untuk dijadikan sebagai suatu industri jamur yang besar. Suatu industri jamur harus dilandasi oleh suatu proses pembibitan yang efisien dan efektif untuk menjaga kelestarian proses produksi. Salah satu penyebab tingginya biaya produksi bibit jamur adalah mahalnya bahan-bahan yang digunakan untuk pembuatan media kultur miselia murni. Biaya produksi bibit dapat ditekan jika dapat ditemukan bahan media lain yang lebih murah. Bahan-bahan seperti agar kertas, bekatul, protein syaraf mineral-mineral komersial dalam bentuk pupuk pertanian dan diperkirakan dapat dijadikan bahan media kultur miselia. Bahan-bahan ini akan efektif penggunaannya jika diketahui komposisi jumlah bahan yang tepat. Peneltian ini bertujuan menentukan komposisi yang optimal dari bahan-bahan tersebut untuk media kultur miselia jamur merang. ...
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Judul: Penggunaan Ekstrak Kecambah Kacang Hijau, Ekstrak Kentang dan Ekkstrak Kayu Karet untuk Produksi Biomassa Miselium Pleurotus ostreatus  (jacq. ex Fr.) Kummer Dengan Teknik Submerged  Culture
Abstrak: Pleurotus ostreatus (jamur tiram pohon) merupakan jamur konsumsi yang banyak dibudidayakan dan banyak diminati. Produksi miselium dengan teknik szrmberged cultzrre merupakan altematif untuk meningkatkan produktivitas dan efisiensi produksi miselium jamur. Pada penelitian ini digunakan ekstrak kecambah kacang hijau (tauge), ekstrak kentang dan ekstrak kayu karet sebagai bahan baku alami media cair karena mudah diperoleh, murah, tersedia sepanjang tahun dan mengandung senyawa-senyawa nutrisi yang dapat menunjang pertumbuhan miselium P. ostreatus. Tujuan penelitian ini adalah mencari media terbaik yang terbuat dari ekstrak kecambah kacang hijau (tauge), ekstrak kentang dan ekstrak kayu karet untuk menghasilkan pertumbuhan miselium jamur tiram pohon (P. ostreatus) yang optimal dengan hasil biomassa yang tinggi dengan teknik submerged culture.
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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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