Judul: Potensi Kamera dan Scanner Dibandingkan Spektrofotometer untuk Menganalisis Kandungan Darah dalam Daging
Abstrak: Konsumsi daging sapi di Indonesia hampir selalu meningkat setiap tahunnya. Daging sapi harus selalu diperhatikan keamanan dan kehalalannya. Salah satu cara untuk menentukannya dengan cara menguji kesempurnaan pengeluaran darah saat penyembelihan. Sebelum penyembelihan terdapat dua metode yaitu stunning dan non stunning. Penelitian ini untuk membandingkan potensi kamera ponsel dan scanner dengan basis kolorimetri pada konsentrasi darah daging sapi yang dipotong di RPH (stunning) dan dipotong saat kurban (non stunning).Masingmasing perlakuan menggunakan 12 daging sapi dari sapi yang berbeda-beda. Daging sapi dibuat menjadi ekstrak dan direaksikan dengan malachite green dan H2O2 lalu diuji menggunakan spektrofotometer, kamera ponsel, dan scanner. Gambar yang diambil dengan kamera ponsel dan scanner kemudian diolah menggunakan ImageJ dan dianalisis menggunakan uji T pada aplikasi SPSS. Hasil dari uji spektrofotometer maupun kamera ponsel dan scanner pada konsentrasi darah sapi yang distunning di RPH Bubulak Bogor dan tidak distunning tidak berbeda secara nyata. Penggunaan kamera ponsel dan scanner berpotensi sebagai alternatif spektrofotometer.
Keyword: daging, kolorimetri, non stunning, stunning

Judul: Analisis Hemoglobin Pada Daging Sapi Menggunakan Metode Pencitraan Digital Dengan Prinsip Kolorimetri
Abstrak: Daging sapi merupakan bahan pangan asal hewan yang kebutuhannya terus meningkat seiring dengan meningkatnya jumlah penduduk. Kualitas daging yang dikonsumsi harus diperhatikan. Salah satu uji yang dilakukan untuk analisis kualitas daging yaitu melihat kesempurnaan pengeluaran darah. Penelitian ini dilakukan untuk mengetahui kemampuan kamera ponsel dan scanner dalam mengukur kadar hemoglobin pada daging sapi yang disembelih menggunakan metode stunning dan non stunning. Penelitian ini menggunakan 9 sapi yang disembelih dengan metode stunning dan 9 ekor non stunning. Masing-masing sapi diambil sampel daging musculus longissimus dorsi (n=9) untuk analisis kadar hemoglobin. Daging dicacah untuk dibuat ekstrak. Ekstrak daging yang telah direaksikan dengan malachite green kemudian diuji menggunakan spektrofotometer, kamera ponsel dan scanner. Gambar dari kamera ponsel dan scanner kemudian diolah dengan menggunakan aplikasi ImageJ. Hasil uji korelasi mengindikasikan adanya hubungan yang sangat kuat antara kamera ponsel dan spektrofotometer, serta hubungan kuat antara scanner dan spektrofotometer. Hasil pengukuran kadar Hb menggunakan kamera ponsel dan scanner memiliki kesesuaian dengan spektrofotometer. Kamera ponsel dan scanner dapat digunakan sebagai alat untuk menganalisis kadar hemoglobin pada daging sapi yang disembelih menggunakan metode stunning dan non stunning., Beef is a food of animal origin whose demand continues to increase along with the increasing population. The quality of meat consumed must be considered. One of the tests carried out to measure the quality of meat is to see the perfection of blood expenditure. This study was conducted to determine the ability of cellphone cameras and scanners to measure hemoglobin levels in beef slaughtered using stunning and non-stunning methods. This study used 9 cows that were slaughtered using stunning method and 9 cows that were slaughtered using non- stunning method. Each cow was sampled from the musculus longissimus dorsi muscle (n=9) for hemoglobin analysis. Beef was shredded to make extracts. Beef extract that has been reacted with malachite green is then tested using a spectrophotometer, camera phone and scanner. The results of the images from the camera phone and scanner were then processed using the ImageJ. The correlation test results indicated a very strong relationship between camera phones and spectrophotometers, as well as a strong relationship between scanners and spectrophotometers. The results of measuring Hb levels using cell phone cameras and scanners are in agreement with the spectrophotometer. Mobile phone cameras and scanners can be used as tools to analyze hemoglobin levels in beef slaughtered using stunning and non-stunning methods.
Keyword: ImageJ, kadar hemoglobin daging, kolorimetri, penyembelihan non stunning, penyembelihan stunning, colorimetry, meat hemoglobin levels, non-stunning slaughter, stunning slaughter

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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