Judul: Karakterisasi Sensor Kristal Fotonik Satu Dimensi untuk Pengukuran  Gas Nitrogen Dioksida
Abstrak: Pengukuran konsentrasi gas pencemar masih terus dikembangkan, salah satunya adalah pengukuran gas pencemar NO2 berbasis optik menggunakan kristal fotonik satu dimensi. Penelitian ini memanfaatkan metode Griess Saltzman sebagai penjerap NO2 sehingga berubah menjadi larutan azo dye berwarna merah muda. Panjang gelombang 550 nm merupakan hasil karakterisasi larutan azo dye yang digunakan untuk pabrikasi kristal fotonik. Kristal fotonik dapat mengukur konsentrasi gas lebih sensitif dan real time karena dapat membaca setiap perubahan konsentrasi dalam larutan. Dalam presentasi ini juga dilaporkan bahwa hasil perbandingan antara pengukuran konvensional dengan pengukuran menggunakan kristal fotonik didapat dari hasil uji tegangan dan uji transmitansi. Hasil konsentrasi gas yang didapatkan sebagai hasil pengenceran sampel masing-masing pengujian, dikalibrasi dan diterjemahkan sesuai Indeks Standar Pencemar Udara (ISPU) dan Air Quality Index (AQI). Berdasarkan hasil pengamatan, koefisien determinasi dari perbandingan massa NO2 hasil perhitungan dan hasil pengukuran konvensional pada uji tegangan mencapai 99.9 %, sedangkan koefisien determinasi perbandingan massa NO2 hasil perhitungan dan hasil pengukuran konvensional pada uji transmitansi mencapai 99.5 %.
Keyword: photonic crystal, real time, concentration callibration, NO2

Judul: Sistem Instrumentasi Berbasis Kristal Fotonik Satu Dimensi untuk Pengukuran Parameter Gas NO2 pada Indeks Standar Pencemar Udara
Abstrak: The objective of this research was to build an integrated instrumentation based on one dimensional photonic crystal for NO2 gas measurement. The phenomenon of photonic pass band has been used as an optical detection for liquid concentration measurement. Photonic crystal, light emitting diode, and photodiode were designed to operate in NO2 absorption spectra that are in the range between 500 – 600 nm. The integrated optical instrument consists of three major subsystems i.e. optical sensor based on photonic crystal, signal conditioning, as well as control and data processing. The experimental results showed that the instrument was able to detect and measure the variation of NO2 gas concentration with resolution about 8 bit per μg/m3 equivalent to 14 bit/ppb.
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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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