STUDY OF VIBRIO SPECIES AND ITS OCCURRENCE FREQUENCY IN COLLECTED SEAFOOD SAMPLES

ABSTRACTObjective: The intention of the present study was to investigate the prevalence of Vibrio species in seafood samples.Methods: A total of 20 seafood samples include finfishes and crustaceans of marine origin were collected from the local fish market of Kanchipuram,Tamil Nadu. Vibrio colonies were isolated from the samples and identified by cultural, morphological, and biochemical studies. Then, the percentagefrequencies of the Vibrio species were intended.Results: A total of 58 Vibrio colonies were isolated from the collected seafood samples. In this, Barracuda fishes contained a higher number ofVibrio colonies (16.07%) followed by Indian mackerel and Crustaceans (12.5%). The foremost three Vibrio species, viz., Vibrio cholerae, VibrioParahaemolyticus, and Vibrio alginolyticus were identified by studying cultural, morphological, and biochemical characteristics, and the incidencepercentage was found as 22.41%, 17.24%, and 12.07%, respectively, from the total Vibrio colonies isolated.Conclusion: Thus, these results revealed that the pathogenic Vibrio species of V. cholerae and V. parahaemolyticus was found higher percentages incollected seafoods.Keywords: Seafood, Vibrios, Finfish, Vibrio parahaemolyticus

Relativistic quantum mechanics with trapped ions

We consider the quantum simulation of relativistic quantum mechanics, as described by the Dirac equation and classical potentials, in trapped-ion systems. We concentrate on three problems of growing complexity. First, we study the bidimensional relativistic scattering of single Dirac particles by a linear potential. Furthermore, we explore the case of a Dirac particle in a magnetic field and its topological properties. Finally, we analyze the problem of two Dirac particles that are coupled by a controllable and confining potential. The latter interaction may be useful to study important phenomena as the confinement and asymptotic freedom of quarks.Comment: 17 pages, 4 figure

Observations of Λb0→ΛK+π−\Lambda_b^0 \to \Lambda K^+\pi^- and Λb0→ΛK+K−\Lambda_b^0 \to \Lambda K^+K^- decays and searches for other Λb0\Lambda_b^0 and Ξb0\Xi_b^0 decays to Λh+h′−\Lambda h^+h^{\prime -} final states

See paper for full list of authors - All figures and tables, along with any supplementary material and additional information, are available at this https URLInternational audienceA search is performed for the charmless three-body decays of the Λ0b and Ξ0b baryons to the final states Λh+h′−, where h(′)=π or K. The analysis is based on a data sample, corresponding to an integrated luminosity of 3fb−1 of pp collisions, collected by the LHCb experiment. The Λ0b→ΛK+π− and Λ0b→ΛK+K− decays are observed for the first time and their branching fractions and CP asymmetry parameters are measured. Evidence is seen for the Λ0b→Λπ+π− decay and limits are set on the branching fractions of Ξ0b baryon decays to the Λh+h′− final states

Propitious Checkpoint Intervals to Improve System Performance

The large scale of current and next-generation massively parallel processing (MPP) systems presents significant challenges related to fault tolerance. For applications that perform periodic checkpointing, the choice of the checkpoint interval, the period between checkpoints, can have a significant impact on the execution time of the application and the number of checkpoint I/O operations performed by the application. These two metrics determine the frequency of checkpoint I/O operations performed by the application, and thereby, the contribution of the checkpoint operations to the I/O bandwidth demand made by the application. In a computing environment where there are concurrent applications competing for access to the network and storage resources, the I/O demand of each application is a crucial factor in determining the throughput of the system. Thus, in order to achieve a good overall system throughput, it is important for the application programmer to choose a checkpoint interval that balances the two opposing metrics - the number of checkpoint I/O operations and the application execution time. Finding the optimal checkpoint interval that minimizes the wall clock execution time, has been a subject of research over the last decade. In this paper, we present a simple, elegant, and accurate analytical model of a complementary performance metric - the aggregate number of checkpoint I/O operations. We model this and present the optimal checkpoint interval that minimizes the total number of checkpoint I/O operations. We present extensive simulation studies that validate our analytical model. Insights provided by this model, combined with existing models for wall clock execution time, facilitate application programmers in making a well informed choice of checkpoint interval leading to an appropriate trade off between execution time and number of checkpoint I/O operations. We illustrate the existence of such propitious checkpoint intervals using parameters of four MPP systems, SNL\u27s Red Storm, ORNL\u27s Jaguar, LLNL\u27s Blue Gene/L (BG/L), and a theoretical Petaflop system

Pressure Drop and Liquid Holdup in Co-current Gas-Liquid Downflow of Air-CMC Solutions through Packed Beds

The present available experimental data on liquid holdup (735 data points) and pressure drop (863 data points) in co-current gas-liquid downflow through packed beds obtained using air-non-Newtonian (w = 0.2 %, 0.5 %, 0.8 % and 1 % CMC) solutions, were analyzed for their dependency on the system variables. Modified Reynolds number and Morton’s number involving flow consistency index (k) and flow behavior index (n), along with other variables were used for the development of unified correlations to represent the available data

Spectroscopic investigations of M(CO)<SUB>5</SUB>-C<SUB>60</SUB> (M = W, MO) complexes: precursors for metal fullerides

Photochemical reactions of M(CO)6 (M = W, Mo) with C60in solution yield η:2-complexes of M(CO)5 with C60. The complexes have been characterised by IR, UV/VIS, NMR and DSC. They do not show any orientational ordering down to 12 K and all the infrared bandwidths remain the same down to this temperature. The complexes can be decomposed thermally or photochemically yielding metal fullerides, which show characteristic reduction in peak width in the variable temperature IR spectra due to orientational ordering. Transitions are manifested in calorimetric studies also. Metal → C60 charge-transfer is observed in IR and XPS. A high temperature IR study of the C60-W(CO)5 complex reveals sequential elimination of the carbonyls yielding MC60. The study shows that carbonyl complexes can be used as precursors to make transition metal fullerides