Judul: Studi Kasus: Kajian Histopatologi pada Seekor Singa Afrika (Panthera leo) yang Menderita Pyometra
Abstrak: An African lioness (Panthera leo) was diagnosed with pyometra after it was found dead with purulent discharge from the vulva. The purpose of this study is to examine gross and histopathological changes of various organs of the lion to know the causes of the death. The organ sample of heart, lungs, liver, intestine, kidney, and uterus were made into histopathology slide with Haematoxilin-Eosin staining. Histopathological examination showed cardiomyopathy, emphysema and edema pulmonum, purulent enteritis, hepatopathy and passive liver congestion, and also chronic active nephritis. Uterus inflammation with purulent exudation indicated pyometra with cystic endometrial hyperplasia. Pyometra in the lion leads to sepsis that is characterized by hemorrhage and degeneration of parenchymal organs. Cardiomyopathy causes heart failure which leads to congestion of the entire organ. Lion’s death was caused by sepsis and heart failure.
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Judul: Studi Kasus: Kajian Histopatologi Pada Kematian Seekor Biawak Ambon (Varanus indicus)
Abstrak: The aim of this case study was to study the cause of death of an Ambon monitor lizard (Varanus indicus) which died suddenly without showing any clinical signs. Organs that were showing abnormality were collected and histopathologically processed. Gross examination showed enlarged liver with multiple white foci ranging from 0.1 to 2 cm in diameter and diagnosed as multifocal abcess. Abcesses were also found in the spleen and kidney. The mucosa of the intestine was filled with hemorrhage exudate and contained many necrotic areas. The intestine was diagnosed as enteritis hemorrhagica et necroticans. The histopathological examination showed granulomatous inflammation in the liver, spleen, kidney and intestine, and amoebas were found in all of these organs. The death of this lizard is caused by liver failure and multifunctional organ failure caused by chronic inflammation of amoebiasis.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4