Judul: Ekstraksi Dan Aktivitas Antikoagulan Heparin Hati Kerbau Lokal (Bubalus Bubalis).
Abstrak: Antikoagulan merupakan bahan yang digunakan untuk mencegah pembekuan darah dengan cara menghambat beberapa fungsi faktor darah, serta dapat mengurangi dan mencegah koagulasi darah. Salah satu senyawa yang mengandung antikoagulan adalah heparin. Heparin dapat diproduksi dari jaringan mammalia. Jaringan mammalia yang dapat digunakan salah satunya ialah hati kerbau. Heparin hati kerbau lokal diekstraksi menggunakan metode Marx, ditentukan kadar protein heparin dengan metode Lowry, dan dilakukan uji aktivitas antikoagulan heparin secara kualitatif serta dilakukan pengujian FTIR (Fourier Transform Infrared). Rata-rata nilai rendemen dari ekstraksi heparin hati kerbau lokal sebesar 71,482 % dengan kadar protein sebesar 36,691 μg/mL dan nilai LED konstan pada 1-2 mm/jam. Senyawa penyusun ekstrak heparin hati kerbau lokal mengandung ikatan amina, cincin aromatik, fenol, alkohol, keton dan ester.
Keyword: antikoagulan, FTIR, hati kerbau, Uji Laju Endap Darah, Lowry

Judul: Gambaran darah kerbau (Bubalus bubalis) di rumah potong hewan (RPH) Cakung Jakarta Timur
Abstrak: Tujuan dari penelitian ini adalah mempelajari gambaran darah kerbau dengan cara, menganalisis serum yang meliputi total 8 protein, albumin, globulin, rasio albumin dan globulin, kholesterol, betalipoprotein, bilirubin, kalsium, fosfor, magnesium, besi, Glutamat Oksaloasetat Transaminase (GOT), Glutamat Piruvat Transaminase (GPT), dan alkali fosfatase. Penelitian dilaksanakan selama dua bulan yaitu pada bulan Januari sampai Februari 1990 dengan mempergunakan contoh darah kerbau (Bubalus bubalis) yang diambil dari Rumah Potong Hewan (RPH) Cakung Jakarta Timur. Pengambilan contoh darah kerbau dilakukan tanpa memperhatikan faktor umur, jenis kelamin, gejala klinis dan patologis, dan asal- usul kerbau yang berada di RPH Cakung Jakarta. Sehingga gambaran darah kerbau ini bukan merupakan pencerminan dari kondisi hewan yang digunakan untuk penelitian. Untuk pemeriksaan semua komposisi darah digunakan serun. Diambil 10 ml darah kemudian disimpan pada suhu 37°C beberapa lama sampai terbentuk serum. Serum yang terbentuk dipisahkan dari bekuan darah dengan pipet atau jika butir-butir darah merah masih terbawa, serum dipisahkan dengan pemusingan (sentrifugasi). ...
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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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