Judul: Sarung Tangan Lateks Antibakteri dengan Tambahan Ion Perak.
Abstrak: Infeksi nosokomial merupakan infeksi yang berasal atau terjadi di rumah sakit, disebabkan oleh penyebaran bakteri dari peralatan medis, dan menyebabkan 12–52% kematian di berbagai negara. Salah satu upaya pencegahannya adalah dengan menggunakan sarung tangan antibakteri. Pada penelitian ini, sarung tangan antibakteri dibuat dengan pencelupan dalam larutan antibakteri. Ion Ag+ memiliki kemampuan antibakteri dan belum dikembangkan sebagai agen penyalut pada sarung tangan medis. Pencelupan menyebabkan sarung tangan berwarna gelap diduga karena terbentuknya Ag2O. Kemampuan antibakteri sarung tangan terlapis Ag diuji sesuai dengan Japanese Standard Association dan menunjukkan kemampuan antibakteri dibandingkan dengan blangko. Efek bakterisidal sarung tangan lebih efektif pada bakteri Escherichia coli dengan daya hambat 85% sedangkan pada bakteri Staphylococcus aureus hanya 46%. Tambahan amilosa tertaut silang EPC pada larutan pencelup tidak meningkatkan kemampuan antibakteri sarung tangan. Waktu pencelupan optimum adalah 10 menit. Sarung tangan dapat disimpan hingga 2 pekan tanpa penurunan daya hambat.
Keyword: antibakteri, Escherichia coli, infeksi nosokomial, ion Ag+, sarung tangan lateks, Staphylococcus aureus

Judul: Ekstrak Teh sebagai Agen Antibakteri untuk Pelapis Sarung Tangan Medis.
Abstrak: Sarung tangan antibakteri merupakan upaya mencegah infeksi nosokomial yang terjadi di lingkungan rumah sakit. Penelitian ini bertujuan membuat sarung tangan antibakteri menggunakan ekstrak teh lalu menguji sifat antibakteri dan sifat fisiknya. Kandungan ekstrak teh dianalisis menggunakan kromatografi gasspektrometri massa (GC-MS), yang menunjukkan kandungan kafein, polifenol, dan senyawa organik lain. Sifat fisik sarung tangan melewati beberapa pengujian, yaitu uji kualitatif dengan AgNO3, uji kuat tarik, dan dengan spektrofotometer inframerah Fourier (FTIR). Uji AgNO3 dan FTIR menunjukkan keberadaan lapisan ekstrak teh di permukaan sarung tangan. Adanya ekstrak teh tidak mengubah sifat fisik sarung tangan tersebut. Sifat antibakteri sarung tangan diuji dengan metode JIS Z 2801 tahun 2012. Hasilnya menunjukkan bahwa ekstrak teh dapat menginhibisi 90% bakteri Staphylococcus aureus dan 84% bakteri Escherichia coli. Kondisi optimum pada uji antibakteri adalah konsentrasi larutan pencelup 5% dan waktu pencelupan 1 jam.
Keyword: antibakteri, ekstrak teh, infeksi nosokomial, polifenol, sarung tangan

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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