Judul: Rancang Bangun Alat Ukur Kadar Larutan Glukosa Berbasis Film Barium Stronsium Titanat (BST)
Abstrak: Barium strontium titanate (BST) is a photodiode as a ferroelectric material that has been developed in many application such as sensor technology. The purpose of this study is to design a simple measurement tool of glucose with BST thin film as the sensor component and the signal conditioning. The measurement tool test was done by measuring blood glucose levels ranging from 20 to 180 mg/dL, which is the range of glucose levels for person who has lack glucose to the excess glucose. The test results showed that the measurement tool could detect each addition of glucose levels by 1 mg/dL which would reduce the value of the output voltage of 0.0022 V. In addition, the test results showed that the response of the circuit approach to linear, the correlation coefficient (R2) is 0.9155 and 0.8931. The test results also showed good hysteresis as showed by the relatively same graphic plots.
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Judul: Karakterisasi Optik dan Listrik Film Ba0.55Sr0.45TiO3 untuk Aplikasi Sensor Kadar Gula Darah
Abstrak: Ba0.55Sr0.45TiO3 films had been successfully deposited on the substrate of p-type Silicon (100) using Chemical Solution Deposition (CSD) and spin coating method with 3000 rpm rotation speed for 30 seconds and 1 M solubility. Thin film was annealed at temperature of 750 oC, 775 oC, 825 oC, 875 oC and 925 oC for 15 hours with rate of temperature rise 1.67 oC/minute. Optical test results showed the BST films can absorb visible light, so it can be used for non-invasive blood sugar level sensors. Analysis of the band gap energy performed using the Tauc Plot method results with the range of 2.843-3.169 eV. Electrical test results demonstrated the BST films are diodes. SEM results of BST films showed a non-homogeneous surface morphology. EDX results showed that the composition of the BST constituent is not fully in accordance with stoichiometry.
Keyword: Bogor Agricultural University (IPB), blood sugar level sensor, optical properties, electrical properties, EDX, BST

Judul: Daerah penyebaran dan variasi morfologi ular putih (Micropechis ikaheka) di Papua
Abstrak: The objectives of the research were to identify the area of distribution and the specific habitat of the white snake (Micropechis ikaheka) in Papua (Western New Guinea), and also to explain the morphological variation among the populations of that snake. About eight months of field work were taken to conduct the survey (April 2002; June 2006; and March to Augusts 2007) in several areas in the mainland and off-shore islands of Papua. Observation were carried out in the field at night and during the day to collect the snake. Also, studies were done on a collection of specimens that were found in the Museum Zoologicum Bogoriense LIPI in Cibinong, Conservation International in Jayapura and the Biology Laboratory of the Papua State University in Manokwari. The results showed that the white snake Micropechis ikaheka can be divided into three separate groups based on the color of the scales, i.e. Black, Brown and Yellow. The black one is the new group found in this research, and also there was one individual snake with transitional coloration between the brown group and the yellow group. However, M. ikaheka is common and has a relatively wide distribution in New Guinea, but every group has a specific and limited area of distribution. The group with black color is distributed in the islands of Waigeo and Batanta and the group with yellow color is distributed starting from Manokwari, Sorong, upto the islands of Salawati, Batanta and Waigeo. Meanwhile, the brown colored sanke is distributed from the island of Yapen, mainland of waropen, Mamberamo, Jayawijaya, Mindiptana upto Papua New Guinea.
Keyword: The white snake, Micropechis ikaheka, Are of distribution, Morphological variation, Famili Elopidae