Rajungan (Portunus pelagicus) merupakan salah satu sumberdaya perikanan yang memiliki wilayah persebaran yang beragam di Indonesia, salah satunya adalah Laut Jawa. Wilayah persebaran yang beragam menyebabkan kondisi lingkungan yang berbeda, sehingga diduga dapat menimbulkan keragaman morfometrik. Tujuan dari penelitian ini adalah menganalisis keragaman morfometrik P. pelagicus di WPP 712 untuk menggambarkan kondisi unit stok rajungan di wilayah tersebut. Lokasi pengambilan contoh berada di Pulau Lancang, Cirebon, dan Madura. Pengukuran karakter morfometrik rajungan dilakukan dengan metode baku. Hasil yang didapat pada analisis Kruskall-Wallis terdapat 4 karakter pembeda pada metode baku. Analisis kluster memperlihatkan bahwa P. pelagicus di Pulau Lancang dan Cirebon membentuk kelompok yang sama, sedangkan P. pelagicus di Madura membentuk kelompok yang terpisah. Analisis diskriminan menunjukkan terdapat tiga populasi P. pelagicus, yaitu populasi Pulau Lancang, Cirebon, dan Madura. Be...

Radiolabelled and fluorescent-dye-conjugated oligonucleotide probes which targeted rRNA sequences were developed for the enumeration of the ruminal bacterium Synergistes jonesii 78-1 in mixed culture. Two probes were tested, and both were highly specific for the respective complementary sequences of the target organism. Individual cells of S. jonesii in pure and mixed cultures were clearly visualized in situ by hybridization with the fluorescent-dye-conjugated probe but could not be detected in natural samples. Therefore the radiolabelled probe was used to monitor the population of S. jonesii introduced into a chemostat which simulated the rumen ecosystem. The S. jonesii probe did not hybridize to RNA extracted from the culture prior to inoculation with the target organism. After inoculation, S. jonesii rRNA represented 4.5% of the total bacterial rRNA and then rapidly declined to < 0.2% before increasing to about 1% of the total bacterial rRNA during the following 3 weeks. This ...

Introduction: This study aimed to compare the storage stability of tomato paste packaging of cans and a container with the brand name of "Robby" during 6 weeks. Materials & Methods: Four cans of tomato paste were prepared from brand A. Sample 1 was covered with the plastic lid after opening. Sample 2 was transferred into a container with the brand name of "Robby". Tomato paste of cans 3 and 4 were contaminated with Aspergillus flavus spore ssuspension­­­ (t 2×106spore/ml) and homogenized in a sterile container. Subsequently, an equal amount of contaminated tomato paste was transferred into the original can (sample 3) and the "Robby" container (sample 4). Samples were stored in a refrigerator at 4°C for 6 weeks. Samples 1 and sample 2 were evaluated regarding acidity, Brix, pH, vitamin C, as well as total bacteria, mold, and yeast count. However, samples 3 and 4 only were analyzed in terms of total bacteria, mold, and yeast count with two replications. All the experiments were individually repeated on another tomato paste with a different brand name. Ethics code: 395833 Findings: After the second week, there was a 62% decrease and a 4% increase in vitamin C and Brix levels in the tomato paste in the can. However, the reduction in vitamin C level (5%) and the Brix changes were not significant in the "Robby" container. The gradual increase of acidity was observed in both treatments. Nevertheless, there was an increase in the acidity of the tomato paste kept in the can (28%) and "Robby" container (22%) at the end of the sixth week (P<0.05). The "Robby" container had no significant effect on pH and microbial groups (P> 0.05). Discussion & Conclusions: The "Robby" container definitely provides better conditions for preserving the chemical properties of tomato paste than common means of tomato paste storage.

The fatigue strength validation by tests of the railway bogie frames requires existence of an expensive laboratory and a long time for testing of about 6 to 10 months. Considering these aspects, the European norms admit that fatigue tests can be replaced by finite elements analysis (FEA), with the condition that analytical model to be correctly realized and validated by tests. Experimental modal analysis (EMA) provides a powerful tool for validation of the FEA model by experimental data. The article presents an application for assessment of the fatigue strength of a three-axle locomotive bogie frame. Using Ansys, was carried out the structural analysis of the bogie frame, resulting the modal model characterized by the modal parameters: Eigen frequencies and Eigen shapes. The analytical model was validated by an EMA application carried out on the bogie frame and correlation analysis of the EMA and FEA models. Using a special measuring wheel set, were determined the wheelrail interact...

Saat ini sangat banyak perusahaan-perusahaan kapal yang sedang berlomba-lomba untuk menciptakan desain kapal yang paling bagus baik dari segi teknis maupun ekonomisnya. Hambatan kapal atau Resistance adalah salah satu yang sangat di perhatikan. Dari permasalahan ini penulis melakukan penelitian untuk mencari niali hambatan terkecil dari kapal Perintis 750 DWT setelah di lakuakan perubahan bentuk haluannya dari konvensional menjadi bentuk X-Bow. Bentuk X-bow ini bertujuan untuk mengurangi hambatan Total suatu kapal. Permodelan kapal variasi ini di buat menggunakan orca default dari software rhinoceros dan di lanjutkan di software delfship yang kemudian di analisa perhitungan hambatannya menggunakan Software Berbasis CFD yaitu Tdyn 12.2.3.0. dengan menggunakan variasi sudut Stem Rake dan Sudut Forefoot yang dirangkum dengan RSM. Hasilnya, nilai hambatan Setelah di olah menggunakan RSM pada orde II mendapatkan respon persamaan model yaitu Y = 0,5168 – 0.00629X 1 – 0,00168X 2 – 0,004...

The aim of this prospective randomized controlled trial was to evaluate the influence of clinical baseline characteristics on the survival of 2 post systems. One hundred patients needing a post were included. Half the patients received a glass fiber-reinforced post (FRP), and the other half received metal screw posts (MSP). The posts were assigned randomly. In addition to demographic data, the following parameters were recorded: type of tooth (incisor/canine versus molar/premolar), length of the post in relation to root length (percentage), extent of coronal tooth destruction (percentage), ferrule height (in millimeters), type of restoration (fixed or removable partial denture), and presence of antagonistic contacts (yes/no). After at least 1 year (mean: 13.84 months), the patients were recalled. Statistical analysis was performed using the log-rank test and Cox regression analysis. The survival rate of FRPs was 93.5%. In the MSP group, the survival rate was significantly lower (75....

Non operative management is currently the standard treatment of blunt abdominal solid organ injuries grades I-IV (American Association for the Surgery of Trauma’s organ injury scale) in children. Even though post-traumatic splanchnic pseudoaneurysms are an infrequent complication, they may potentially lead to life-threatening intra-peritoneal or retroperitoneal bleeding. In adults, the relationship between failure of conservative management in abdominal trauma patients and delayed rupture of a pseudoaneurysm identified in follow-up imaging is well established, as is the capability of selective angioembolization to decrease non operative management failure rate. In the pediatric population, the clinical and prognostic significance of splanchnic pseudoaneurysms remains controversial and, currently, there are no high-level evidence-based guidelines on its management. The authors of this paper present 3 cases of post-traumatic abdominal pseudoaneurysms in children which were identified ...