Judul: SARI. The Influence of Sauropus androgynus Leaf Extract and Fraction Administration on Rat’s Uterine Involution.
Abstrak: Penelitian ini dilakukan untuk menguji khasiat ekstrak dan fraksi daun katuk (Sauropus androgynus) terhadap involusi uterus dengan menggunakan tikus sebagai hewan percobaan. Sebanyak 15 ekor tikus betina bunting di bagi menjadi 5 kelompok perlakuan: kontrol (K), ekstrak etanol (E-EtOH), fraksi heksan (F-H), fraksi air (F-H2O), dan fraksi etil asetat (F-EtAc). Pengaruh perlakuan terhadap involusi uterus dilihat dengan mengukur berat uterus pada 5 hari postpartus dan 10 hari postpartus. Data yang diperoleh dari pengukuran dianalisis dengan menggunakan Uji Sidik Ragam (ANOVA) dan dilanjutkan dengan uji lanjut (Duncan Test). Hasil penelitian menunjukkan bahwa kelompok fraksi heksan dan ekstrak etanol pada 5 hari postpartus mengalami perlambatan involusi uterus, namun bobot uterus kedua kelompok ini sudah mencapai ukuran normal pada 10 hari postpartus. Involusi uterus pada kelompok fraksi etil asetat dan fraksi air terjadi lebih cepat dibanding kelompok lain. Bobot uterus kedua kelompok ini sudah mencapai bobot normal pada 5 hari postpartus, namun berat uterus semakin mengecil pada 10 hari postpartus. Kesimpulan dari penelitian ini adalah pemberian ekstrak dan fraksi daun katuk dapat mempengaruhi involusi uterus tikus
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Judul: Gambaran Histopatologi Hati dan Ginjal Tikus Laktasi yang Diberi Ekstrak dan Fraksi Sauropus androgynus (L.) Merr Sejak Bunting Sampai 10 Hari Postpartus
Abstrak: This study was aimed to obtain the information about the possibility of side effects (toxic) from consuming of katuk (Sauropus androgynus) leaf extract and fractions using rats as experimental animals. Fifteen pregnant female rats were divided into 5 treatment groups; control (K), ethanol crude exstract (EEtOH), hexan fraction (F-H), ethylacetate fraction (F-EtAc), and water fraction (- FH2O). The katuk leaf extract and fraction were fed from the beginning of pregnancy until 10 days postpartus. Histopathological assay was conducted to investigate the effect of treatment to the liver and kidneys at 10 days postpartus. Histopathology of liver showed that the katuk leaves extract group F-H2O, F-EtAc, and E-EtOH are able to protect the hepatocyts of the liver from apoptosis, but the katuk leaves extract or their metabolites tended to increase the number of apoptosis on renal tubular epithelium of the kidneys. For both organs, the result indicated that the group of katuk leaves water fraction (F-H2O) treatment cause the minimal damage among the others.
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Judul: Pengembangan Model Codebook untuk Identifikasi Chord Gitar
Abstrak: Acoustic guitar can produce sound waves with different types of tones. High-low tone is determined by the fundamental frequency of the sound wave. Human sense of hearing can distinguish high-and low tones, but can not know for sure what kind of tone is heard by him. This study developed a guitar chord recognition system. This study uses MFCC as feature extraction methods and the codebook as pattern recognition method for identification of the guitar chord. Cluster technique used in this study is the K-means clustering. Data obtained from MFCC are clustered using the K-Means method, and the model for classification is constructed using the codebook method. The parameters used in MFCC is the number of cepstral coefficients, overlap, and the time frame, while an important parameter in the K-Means is the number of clusters. This study uses 8640 guitar chord sounds from 24 classes. Each of the data is made up of two chords which will be tested. Simulation results show that the maximum accuracy obtained is 98.89% obtained on 26 cepstral coefficients, overlap 0.4, time frame is 30 ms, on 100 clusters.
Keyword: chord, codebook, k-means, mel frequency cepstral coefficients (MFCC)