Judul: Jumlah Total Mikroorganisme pada Telur Ayam dan Bebek yang Dijual di Pasar Tradisional di Wilayah Provinsi Jawa Barat
Abstrak: The objective of this research was to study the total plate count of chicken and duck eggs in West Java. This research consist of two parts, data collection using questionnaire and laboratory work. The questionnaire was collected from 35 eggs traders in traditional market of West Java, then analyzed descriptively. There were 25 chicken eggs and 10 duck eggs taken in purpose from traditional markets for sampel testing. The average result of microorganism on chicken eggs in Purwakarta, Bogor, Cianjur, Indramayu district, and Cirebon municipality was 1.2 x 102 cfu/ml, 2.0 x 101 cfu/ml, 1.2 x 101 cfu/ml, 2.9 x 102 cfu/ml, and 6.8 x 105 cfu/ml respectively. The average result of the total plate count on duck eggs in Indramayu district and Cirebon municipality was 1.2 x 103 cfu/ml and 2.8 x 104 cfu/ml respectively. Based on SNI 3926:2008, the maximum limit of total plate count on chicken and duck eggs was 1.0 x 105 cfu/ml. The result showed that number of microorganism did not comply with SNI of chicken and duck eggs were 4% and 10%.
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Judul: Keberadaan Salmonella spp. Pada Telur Ayam Dan Telur Bebek Yang Dijual Di Pasar Tradisional Di Provinsi Jawa Barat
Abstrak: This study was aimed to observe the occurance of Salmonella spp. in layer and duck eggs, and gave information of wet markets sanitation and hygiene in traditional markets of West Java Province. The study consist of two parts, field questionnaires and laboratory work. Data questionnaires was obtained from 35 egg retailers in West Java. Detection of Salmonella consisted of layer eggs (n=25) and duck eggs (n=10) were taken purposively from wet markets and determineted according to the Compendium of Methods for the Microbiological Examination of Foods. The result showed that the occurance of Salmonella in layer and duck eggs were 4% and 0%, respectively.
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Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition