Judul: Mempelajari Aktivitas Antibakteri Bubuk Rimpang Kunyit (Curcuma domestica Val.)
Abstrak: Experiment were conducted to study the antibacterial activity of turmeric powder autoclaved in liquid medium on 6 species of bacteria: Staphylococcus aureus, Streptococcus faecalis, Salmonella gallinarium, Escherichia coli, Bacillus subtilis, and Lactobacillus acidophilus.
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Judul: In Vitro Antibacterial Activity of Turmeric  Extract against Klebsiella sp. Origin of Cloaca Broiler Chicken
Abstrak: Klebsiella sp. adalah bakteri patogen penyebab infeksi saluran pernapasan yang dapat membahayakan manusia serta hewan. Kunyit (Curcuma domestica Val.) adalah salah satu tanaman tradisional yang dimanfaatkan untuk mengatasi resistensi bakteri terhadap antibiotik. Penelitian ini bertujuan untuk mengetahui aktivitas antibakteri dari ekstrak kunyit terhadap isolat Klebsiella sp. secara in vitro. Metode penelitian terdiri dari re-identifikasi isolat Klebsiella sp., proses ekstraksi kunyit dengan metode maserasi menggunakan etanol 96%, lalu proses evaporasi, dan uji fitokimia ekstrak kunyit. Pengujian aktivitas antibakteri ekstrak kunyit dilakukan dengan menggunakan metode difusi sumur dengan konsentrasi 100, 80, 60, 40, dan 20%. Analisis data untuk mengetahui efektivitas berbagai konsentrasi ekstrak kunyit terhadap Klebsiella sp. dilakukan dengan program SPSS. Hasil uji aktivitas antibakteri menunjukkan bahwa ekstrak kunyit memiliki kemampuan untuk menghambat pertumbuhan Klebsiella sp. Hal ini terlihat dengan munculnya diameter zona hambat di sekitar sumur pada konsentrasi 100, 80, 60, 40, dan 20% dengan rata-rata diameter zona hambat secara berurutan 12,2 mm, 11,5 mm, 10,7 mm, 10,7 mm, dan 10,2 mm. Hasil uji Kruskal-Wallis menunjukkan bahwa setiap konsentrasi ekstrak kunyit dapat menghambat pertumbuhan Klebsiella sp. Hasil uji Mann-Whitney menunjukkan hasil yang beragam pada setiap konsentrasinya., Klebsiella sp. is pathogenic bacteria that cause respiratory tract infections that can harm humans and animals. Turmeric (Curcuma domestica Val.) is one of the traditional plants used to treat bacterial resistance to antibiotics. This study aims to determine the in vitro antibacterial activity of turmeric extract against Klebsiella sp. isolates. The research method consisted of re-identification of Klebsiella sp. isolates, the extraction process of turmeric made by maceration method with 96% ethanol, then evaporation process, and phytochemical test of turmeric extract. The antibacterial test done by using well diffusion method with concentrations of 100, 80, 60, 40, and 20%. Data analysis to determine the effectiveness of various concentrations of turmeric extract against Klebsiella sp. was carried out using the SPSS program. The results of the antibacterial activity test showed that turmeric extract had the ability to inhibit the growth of Klebsiella sp. This can be seen by the appearance of the diameter of the inhibition zone around the well at concentrations of 100, 80, 60, 40, and 20% with an average inhibition zone diameter of 12,2 mm, 11,5 mm, 10,7 mm. mm, 10,7 mm, and 10,2 mm. The results of the Kruskal-Wallis test showed that any concentration of turmeric extract could inhibit the growth of Klebsiella sp. The results of the Mann-Whitney test showed varying results at each concentration.
Keyword: antibakteri/antibacterial, bakteri Gram negatif/Gram negative bacteria, difusi/diffusion, kunyit/turmeric, Klebsiella sp

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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