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: Tingkat cemaran mikroorganisme pada daging ayam dan daging sapi dari pasar tradisional di provinsi Jawa Barat berdasarkan jumlah total mikroorganisme, Staphylococcus aureus, dan Escherichia coli
Abstrak: This study was aimed to determine the level of microorganisms contamination in chicken and beef meat from traditional markets in West Java. A total of 36 samples of chicken meat and 24 samples of beef meat were taken purposively from traditional markets in West Java. The average of Total Plate Count (TPC), Staphylococcus aureus, and Escherichia coli in chicken meat were 4.5 x 106cfu/g, 5.3 x 105 cfu/g, and 2.3 x 101 MPN/g. The average of TPC, S. aureus, and E. coli in beef meat were 3.9 x 106 cfu/g, 1.5 x 106 cfu/g, and 2.6 x 101 MPN/g. Comparing to the Indonesian Standard National (SNI) minimal requirement, the result showed that TPC in chicken meat was 47.22%, for S. aureus and E. coli were 97.22% and 69.44% above SNI 3924:2009, in other hands TPC, S. aureus, and E. coli in beef meat were 58.3%, 100%, and 66.67%, above SNI 3932:2008.
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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: sifat optik, litium niobat, chemical solution deposition, kecepatan putar