Judul: Pengembangan Sistem Akuisisi Spektrofotometer pada Raspberry Pi 3.
Abstrak: Spektrofotometer merupakan alat untuk melakukan analisis suatu bahan kimia. Spektrofotometer sederhana dapat dibuat menggunakan panduan yang terdapat pada Public Laboratory. Spektrofotometer sederhana memerlukan sistem untuk melakukan akuisisi data. Sistem yang sering digunakan memerlukan koneksi internet dengan bandwidth yang cukup besar. Spectral Workbench merupakan salah satu sistem akuisisi data spektrofotometer berbasis web. Koneksi internet seringkali tidak dapat dijumpai pada daerah pelosok tempat suatu bahan kimia yang ingin dianalisis, sehingga menghambat penelitian suatu bahan kimia. Selain membutuhkan koneksi internet mumpuni, penggunaan perangkat komputer seperti laptop untuk menjalankan sistem dirasa kurang ringkas untuk dipindah-pindah. Penelitian ini bertujuan untuk membuat sistem akuisisi spektrofotometer sederhana yang dapat diakses tanpa memerlukan koneksi internet pada perangkat Raspberry Pi 3 sehingga mempermudah proses analisis bahan kimia dan meningkatkan mobilitas penggunaan spektrofotometer. Sistem yang sudah dibuat dapat melakukan akuisisi data sama seperti yang dilakukan oleh Spectral Workbench dengan performa waktu muat halaman dua kali lebih cepat.
Keyword: akuisisi data, Raspberry Pi, spektrofotometer, web apps

Judul: Pengembangan dan Pengukuran Kinerja Analitik Spektrofotometer Sinar Tampak ‘KuantiVis’ Berbasis Detektor Charge-couple Device
Abstrak: The advancement of technology provides alternative ways to develop spectrophotometer using simple components such as web camera with chargecouple device detector. The objective of the research is to develop visible spectrophotometer ‘KuantiVis’ with simple electronic components and web-based software Spectral Workbench as data acquisition system. The performance of KuantiVis was determined by validation of methyl red analysis and rhodamine B measurement in food sample (pacar cina). The whole result was compared with analysis using Spectronic 20D+ and Genesys 10UV. The analytical performance of KuantiVis for methyl red showed linearity with R2 was 0.9629, limit of detection was 0.6953 ppm, limit of quantitation was 2.1070 ppm, recovery was 110.00%, and relative standard deviation was 7.59%. The overall results met the Association of Analytical Communities standard but have not equal to the performance of Spectronic 20D+ and Genesys 10UV. Rhodamine B in pacar cina was 0.0022 (%w/w) based on measurement using KuantiVis. This result was not significantly different at the confidence level 95% using t test and F test as compared to the result using Spectronic 20D+ and Genesys 10UV.
Keyword: visible spectrophotometer, rhodamine B, methyl red, charge-couple device, Bogor Agricultural University (IPB)

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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