Abstract
Fish fillet is one of fisheries products that easily deteriorated; hence handling techniques are needed to maintain the freshness. Ultrasonic wave have been widely applied to some of food products for maintaining freshness through microbial inactivation, however the ultrasonic application to fisheries products has not been reported. The purpose of this study was to analyze the effect of ultrasonic wave on fish freshness. The stages of the study were sample preparation, sonication, freshness parameters examination and histology observation. Ultrasonic wave did not affectthe organoleptic value and the TVB, but affected the pH value and the TPC. The sample in which the TPC value was found significantly different, were further observed after 48 and 96 hours storage. The result showed that the TPC value of sonicated sample for 9 minutes was lower to that of without sonication. Histology analysis showed, however, sonication made the structure of muscle fiber less compact and deformation of myomer was found. Keyword: Fillet, freshness, histology, nile tilapia, sonication, ultrasonic wave
Highlights
Application of Ultrasonic Waves on Maintaining Freshness of Tilapia FilletRuddy Suwandi*, Agoes Mardiono Jacoeb, Maya Sofia Departemen Teknologi Hasil Perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor, Kampus IPB Darmaga, Jalan Agatis, Bogor16680 Jawa Barat
Fish fillet is one of fisheries products that deteriorated; handling techniques are needed to maintain the freshness
The purpose of this study was to analyze the effect of ultrasonic wave on fish freshness
Summary
Ruddy Suwandi*, Agoes Mardiono Jacoeb, Maya Sofia Departemen Teknologi Hasil Perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor, Kampus IPB Darmaga, Jalan Agatis, Bogor16680 Jawa Barat. Abstrak Fillet ikan termasuk salah satu produk perikanan yang mudah mengalami kemunduran mutu sehingga dibutuhkan teknik penanganan untuk mempertahankan kesegarannya. Gelombang ultrasonik telah banyak diaplikasikan pada beberapa jenis produk pangan untuk mempertahankan kesegaran melalui inaktivasi mikroba, namun aplikasinya untuk produk perikanan belum banyak dilakukan. Penelitian bertujuan menganalisis pengaruh gelombang ultrasonik terhadap parameter kesegaran ikan. Tahapan penelitian meliputi preparasi sampel, sonikasi, pengujian parameter kesegaran ikan dan pengamatan histologi. Sampel dengan nilai TPC yang berbeda nyata diuji TPC kembali pada penyimpanan ke-48 jam dan 96 jam. Hasil pengujian nilai TPC menunjukkan bahwa sampel dengan durasi sonikasi selama 9 menit (5,2x104 koloni/g) memiliki jumlah mikroba lebih rendah dibandingkan sampel tanpa sonikasi (9,2x104 koloni/g). Hasil analisis histologi menunjukkan bahwa sonikasi menyebabkan struktur serabut otot terlihat kurang kompak dan pecahnya miomer. Kata kunci: Fillet, gelombang ultrasonik, histologi, ikan nila, kesegaran, sonikasi
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