Judul: Profil Ekhokardiografi M-mode Anjing Kampung pada Pemberian Kombinasi Obat Bius Xylazine- Ketamine dan Zolazepam-Tiletamine
Abstrak: The purpose of this study is to determine the effect of xylazine-ketamine and zolazepam-tiletamine anaesthetic combination in Indonesian mongrel dog heart using M-mode echocardiography. The study was to conduct in five young female dogs with age of 10±2 months, and weight 10±2.5 kg. Examination were performed to dogs in conscious state or after receiving anaesthesi combination intra muscular. The instrument used in this study were ultrasound device (Sonoscope SSI-1000) and convex type transduser with small footprint scanner of 3-7.5 MHz frequency with animal¢s position in right lateral recumbency for short axis view. Eleven parameter of M-mode echocardiography measured were, interventricular septum (IVS), left ventricular internal dimension (LVID), left ventricular wall (LVW) at end-diastole (d) and end- systole (s), stroke volume (SV), cardiac output (CO), ejection time (ET), fractional shortening (FS) and heart rate( HR ). From this study, we found that anaesthetie combination of xylazine-ketamineand causes reduction of parameter HR, LVWd and LVWs, SV, CO, and increation of parameter LVIDd and LVIDs, ET and FS, but the opposite combination of ZT causes increation of HR, LVWd and LVWs, SV, CO, and reduction on parameter LVIDd and LVIDs, ET and FS. The result showed that the combination of xylazine-ketamineand injection have lower values at parameter HR, LVW, SV, and CO (P < 0,05), and higher values at parameter LVID, ET and FS (P < 0,05) and combination of zolazepam-tiletamine injection have higher values at parameter HR, LVWDd and LVWS, SV, CO (P < 0,05), and lower values at parameter LVIDd and LVIDs, ET and FS (P < 0,05)
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Judul: Perbandingan Stabilitas Elektrokardiogram pada Anjing Domestik yang Dianestesi Antara Ketamin, Propofol dan Kombinasinya
Abstrak: The aim of this study is to determine the comparison of stability on electrocardiogram in anesthetized dogs between ketamine, propofol, and its combination. The study was divided into 2 steps. In the first step, eighteen (18) experimental dogs were divided into three groups, group I received ketamine (4 mg/kgBW), group II propofol (4 mg/kgBW), and group III received combination of ketamine (4 mg/kgBW) and propofol (4 mg/kgBW). All groups were preanesthetized with combination of atropine sulphate (0,03 mg/kgBW) and xylazine (2 mg/kgBW), 10 minutes prior to the experiment. The observed parameters were the amplitude of P, R, and T, the interval of QRS, PQ, and QT electrocardiogram (ECG) wave of lead II, as well as heart rate and cardiac axis. The combination of ketamine and propofol yeilded a good depth of anesthesia, provide stability of the ECG is better than single administration of ketamine HCl anesthesia or propofol. In the second step, eighteen (18) experimental dogs were divided in to three groups. All groups are received 0.03 mg/kgBW atropin sulphate and 2 mg/kgBW xylazine intramuscularly and were induced with 4 mg/kgBW ketamine and propofol 4mg/kgBW intravenously respectively 10 minutes prior the experiment, and then received intravenous infusion by a gravimetric method to maintain the anaesthesia status, 20 minutes prior to the experiment. Group I were received ketamine (0.4 mg/kgBW/minutes) infusion, group II propofol (0.4 mg/kgBW/minutes), and group III combination of ketamine (0.4 mg/kgBW/minutes) and propofol (0.4 mg/kgBW/minutes) respectively. The observed parameters were the amplitude of P, R, and T, the interval of QRS, PQ, and QT ECG wave of lead II, as well as heart rate and cardiac axis. The intravenous drip by gravimetric infusion anaesthesia in combination with ketamine and propofol provides stability of the ECG better than single ketamine or propofol.
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Judul: Nanokristalin Pirit (FeS2) sebagai Material Semikonduktor Fotovoltaik.
Abstrak: Teknologi fotovoltaik adalah suatu proses yang dapat mengubah sinar matahari menjadi energi listrik dengan media semikonduktor. Penggunaan sel surya untuk fotovoltaik hanya dapat mengonversi radiasi matahari menjadi energi listrik kurang dari 20%. Efisiensi akan meningkat ketika material semikonduktor untuk fotovoltaik dibuat menjadi ukuran nano. Pirit merupakan salah satu material semikonduktor fotovoltaik yang memiliki energi pita celah (Eg) dalam kisaran 0.8–0.95 eV. Energi pita celah tersebut terbukti meningkat ketika disintesis dengan metode hidrotermal menggunakan beragam molar [S]:[Fe] pada suhu 200 °C dalam 24 jam. Nilai energi pita celah yang dihasilkan adalah 1.58–2.073 eV. Ukuran nanokristalin pirit yang dihasilkan berada pada kisaran 21.04–58.77 nm menurut data Particle Size Analyzer. Besarnya ukuran nanokristal pirit yang tumbuh kurang dari 50 nm merupakan poin penting untuk aplikasi fotovoltaik.
Keyword: Hidrotermal, fotovoltaik, nanokristal, pirit