Judul: Studi Patologi Organ Limpa dan Hati Mencit (Mus musculus) yang Diinfeksi Coxiella burnetii Pasase Dua Kali pada Hamster (Mesocricetus auratus)
Abstrak: Query fever (Q fever) is a disease caused by Coxiella burnetii agent. The aim of this research was to determine the gross pathology and histopathology of Coxiella burnetii infection in the spleen and liver of mice (Mus musculus) which were infected by Coxiella burnetii after twice passage in hamster (Mesocricetus auratus) using immunohistochemistry methods. In this research the gross pathology of liver and spleen showed hepatomegaly, and splenomegaly. The histopathological change of liver showed hepatocyte degeneration, necrose, and infiltration of inflammatory cells. The histopathological change of spleen showed inflammation which characterized by the white pulp depletion, red pulp hemorrhage, and infiltration of inflammatory cell. The results showed positive Coxiella burnetii in the spleen and liver.
Keyword: Coxiella burnetii, immunohistochemistry, Q fever, mice

Judul: Studi Histopatologi Organ Hati Hamster (Mesocricetus auratus) yang Diinfeksi Coxiella burnetii
Abstrak: Coxiella burnetii (C. burnetii) is a bacterial like organism that causes Query fever. The aim of this study was to describe the liver histopathology of hamsters after infected by C. burnetii intraperitoneally. Hamster were divided into two groups. All hamster liver were collected for histopathological examination using hematoxylin-eosin staining (HE) and immunohistochemical staining (IHC). HE staining results in hamsters group I which were injected with C. burnetii’s antigen showed 3 out of 4 has granuloma which are typical of C. burnetii infection. All hamsters group II which were injected with hamsters group I’s spleen extracts showed granuloma in microscopic observation. IHC staining revealed all hamsters liver has positive result. Beside granuloma lesion, all hamster’s liver show acute hepatitis symptoms. The microscopic lesion of acute hepatitis showed the inflammatory cell accumulated in liver perifer, degeneration of hepatocytes cells, activation of lymphoid follicles, as well as congestion in small and large blood vessels.
Keyword: C. burnetii, granuloma, hamster, HE, histopathology, IHC

Judul: Pembuatan Sel Surya Berbasis Film Ferroelektrik Barium Strontium Titanate (Ba0,5Sr0,5TiO3)
Abstrak: Growth of films Ba0,5Sr0,5TiO3 (BST) 1 M has been done with variation of annealing in hold time 8 hours, 15 hours, 22 hours, and 29 hours at constant temperature 8500C, above Si (100) substrate p-type, by using the sol-gel process method which followed with spin coating process at 3000 rpm for 30 seconds. Optics spectroscopy shows that BST film solar cells with annealing hold time 8 hours, 15 hours, and 22 hours, works effectively in wavelength ≥ 700 nm absorption range. Yet for sample with annealing hold time about 29 hours effectively absorb in ≤ 700 nm wavelength range. It obtained BST film refractive index at range 2.0 to 7.0 to wavelength range ±370-870 nm. Band gap BST film value based on annealing hold time 8 hours, 15 hours, 22 hours, and 29 hours respectively 2.60 eV; 3.12 eV: 3.24 eV, and 2.66 eV. Electrical conductivity value which obtained, indicate that the BST film is classified as semiconductor material with conductivity order 10-5-10-4 S / cm. The result of I-V photovoltaic characterization shows the BST film potentially to be a solar cells device with efficiency according to the annealing hold time 8 hours, 15 hours, 22 hours, and 29 hours in a row are 2.68x10-5%, 3.51x10-5%, 4.53x10-5% and 3.22x10-5%
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