Judul: Optimization TLC Mobile Phase Using Mixture Design for Separating Meniran Extract Component (Phyllanthus niruri).
Abstrak: The right mobile phase selection is one of methods to obtain a good component separation. This is the one of method to support fingerprint analysis that will be used as a quality control tool of herbal me dicines. Meniran is one of herbal medicines that used as a sample in this study. Mobile phase optimization was started with elution by using 13 single solvents with 4 kind of detections, namely ultraviolet (UV) 254 nm, UV 366 nm, vanillin-sulfuric acid, and anisaldehyde. Mixture design with simplex centroid scheme is selected to give some combinations from 3 selected solvents , they are acetone, dichloromethane, and chloroform. According to Minitab 14 software, optimum point when using UV 366 nm detection was obtained using chloroform and dichloromethane ratio of 0.6553:0.3447, whereas the optimum point was obtained of using vanillinsulfuric acid detection with chloroform and dichloromethane ratio of 0.0741:0.9259. Both detections results are considered good in terms of high R2 value , with 91.56% for UV 366 nm detection and 95. 16% for vanillin-sulfuric acid detection.
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Judul: Pengoptimuman Fase Gerak KLT dengan Rancangan Campuran untuk Analisis Sidik Jari Temulawak
Abstrak: Temulawak is widely used as jamu, a traditional Indonesia medicine. Therefore we have developed a TLC fingerprint method to standardized raw material or extract of Curcuma xanthorrhiza to ensure the quality of its finished product. The fingerprint of TLC analysis is a common method for this purpose. First step to developed a TLC fingerprint was to select optimum mobile phase to obtained good separation of the components. Simplex centroid design is used for mobile phase optimization from three selected solvents that were acetone, dichloromethane, and chloroform. The results showed that the optimum mobile phase using UV 366 nm detection was obtained using dichloromethane and chloroform ratio of 0.5164:0.4836 with R2 value of 91.39%, whereas the optimum mobile phase using vanillin-sulfuric acid detection was obtained using dichloromethane and chloroform ratio of 0.8178:0.1822 with R2 value of 93.40%.
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Judul: Karakteristik Anatomi Skelet Kepala Buaya senyulong (Tomistoma schlegelii).
Abstrak: Buaya sepit atau senyulong (Tomistoma schlegelii) merupakan jenis buaya asli Indonesia yang berhabitat di sungai-sungai Sumatera, Kalimantan, dan juga pedalaman Sulawesi. Salah satu ciri khas buaya senyulong adalah bentuk moncong yang runcing dan sempit, namun hingga saat ini informasi mengenai struktur skelet kepala buaya senyulong sangat terbatas. Penelitian ini bertujuan untuk mempelajari karakteristik anatomi skelet kepala buaya senyulong yang dikatikan dengan fungsi dan perilakunya. Penelitian dilakukan secara eksploratif dengan melakukan pengamatan, pencatatan, dan pengambilan gambar dari skelet kepala buaya senyulong. Skelet kepala berukuran panjang 70 cm, lebar 29 cm, dan tingggi 17 cm dengan permukaan kasar pada os nasale, os frontale, os maxilla, os mandibula, os lacrimale, os jugale. Jumlah gigi pada buaya ini sebanyak 78 buah, terdiri dari 4 buah gigi premaxila, 16 buah gigi maxila, dan 19 buah gigi mandibula. Pada regio orbitalis ditemukan dua pasang fenestrae temporales yang berkembang baik. Fenestra supratemporale merupakan lubang oval yang membentang di sepanjang os parietale. Fenestra infratemporale berbentuk segitiga dan dibatasi oleh os squamosum, os postorbitale, os jugulare, dan os quadratum. Os mandibula hewan ini mempunyai symphysis mandibularis yang panjang yaitu garis yang melintang di corpus mandibulae. Secara fungsional ukuran symphysis mandibularis berkaitan dengan adaptasi hewan terhadap diet makan.
Keyword: kepala, moncong, Tomistoma schlegelii