Judul: Tingkat Prevalensi Escherichia coli Dalam Daging Ayam Beku Yang Dilalulintaskan Melalui Pelabuhan Penyeberangan Merak
Abstrak: The aimed of this study was to determine prevalence of Escherichia coli in frozen chicken meat transported through Merak port. The samples were taken from DKI Jakarta (16 samples), Bekasi (11 samples), Bogor (8 samples), and Serang (18 samples). The average number of E. coli in frozen chicken meat from DKI Jakarta was 0.43x101±0.28x101 MPN/g, Bekasi was 10.4x101±33.04x101 MPN/g, Bogor was 0.28x101±0.23x101 MPN/g, and Serang was 6.72x101±25.79x101 MPN/g. Based on the result of ANOVA, the four areas had no significance in diferrence (p>0.05). The conclusion of this study showed that the average number of E. coli from Bekasi and Serang were over the maximum limit of microbial contamination as permitted by SNI 01-7388-2009 (1x101 MPN/g), whereas DKI Jakarta and Bogor were under the maximum limit. The prevalence of E. coli in frozen chicken meat from DKI Jakarta was 31.25%, Serang 27.78%, Bekasi 27.27%, and Bogor 12.50%. Keywords: Escherichia coli, frozen chicken meat, Merak port.
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Judul: Cemaran Eschericia coli pada Daging Ayam di Pasar Tradisional Kota Tangerang Selatan
Abstrak: The aim of this study was to observe the total count of Eschericia coli in chicken meat in tradisional markets in South Tangerang City. This study was conducted using survey method by interviewing the vendors of chicken meat as respondents, observing the condition of marketplace using questionnaires, and sampling the chicken meat for laboratory examination. A total of 24 chicken meat samples was obtained purposively from three markets, i.e., Pasar Modern, Pasar Bukit, and Pasar Jombang, and was examined using spread plate method (plate count method). The result of the study showed that Pasar Modern had the best criteria of general hygienic practices. Nevertheless, the laboratory result found that the chicken meat samples from Pasar Jombang showed the highest number of E. coli (5.59 ± 5.64 log10 cfu/gram) and it was followed by Pasar Modern (5.38 ± 5.59 log10 cfu/gram) and Pasar Bukit (5.11 ±5.39 log10 cfu/gram), with the mean of 5.40 ± 5.55 log10 cfu/gram. Compared to the maximum limit of microbial contamination according to the Indonesia National Standard (SNI 7688:2009), 100% of chicken samples from Pasar Jombang were higher than the standard (maximum limit = 1 log10 cfu/gram), and then 100% of samples from Pasar Modern and 100% of samples from Pasar Bukit were higher than standard. The high number of E. coli contamination in chicken meat was supposed in relation with market sanitation, proces eviceration, cross contamination with other food, inadequate personal hygiene practices and lack of cold chain from poultry processing plant until market place.
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Judul: Pembuatan Film Tipis Lithium Niobat (LiNbO3) Menggunakan Metode Chemical Solution Deposition (CSD) dengan Variasi Kecepatan Putar (Rpm).
Abstrak: Film tipis merupakan salah satu aspek yang mendapat perhatian sangat besar dalam bidang material, karena film tipis merupakan material menarik yang memiliki sifat optik yang sangat tergantung pada konstanta dielektrik, indeks bias, dan energi gap. Lithium Niobat (LiNbO3 ) dapat digunakan sebagai pelapis pada film tipis karena memiliki sifat piezoelektrik, electrooptical, pyroelectrical dan photorefractive yang sangat baik. Film tipis Lithium Niobat (LiNbO3 ) ditumbuhkan menggunakan metode Chemical Solution Deposition (CSD) dengan variasi kecepatan 3500 rpm, 5000 rpm, 6500 rpm, dan 8000 rpm. Metode ini memiliki keunggulan dapat mengontrol stokiometri film tipis dengan kualitas yang baik, prosedur yang mudah dan membutukan biaya yang relatif murah. Energi band gap yang dihasilkan dari film tipis Lithium Niobat (LiNbO3) berkisar antara rentang 2.1 eV – 2.8 eV dengan indeks bias berada pada rentang 2.18-3.2. Film tipis LiNbO3 memiliki parameter kisi a=b=5.54Ǻ dan c = 16.35 Ǻ. Struktur morfologi film tipis adalah permukaan yang homogen dan ukuran kristal berada pada rentang 0.417 μm – 0.680 μm.
Keyword: film tipis, sifat optik, litium niobat, chemical solution deposition, kecepatan putar