Trends in world tuna fishery

Since the nineteenth century, indeed since a ncient times tuna fishing has been carried out in many places in the world. These fisheries were local and generally near the coasts. As most species of tunas are highly migratory, fishers caught them only at certain points in their life cycle. In other words, the fishing had to be seasonal

Fuzzy TOPSIS-based Secure Neighbor Discovery Mechanism for Improving Reliable Data Dissemination in Wireless Sensor Networks

Wireless Sensor Networks (WSNs) being an indispensable entity of the Internet of Things (IoT) are found to be more and more widely utilized for the rapid advent of IoT environment. The reliability of data dissemination in the IoT environment completely depends on the secure neighbor discovery mechanism that are utilized for effective and efficient communication among the sensor nodes. Secure neighbor discovery mechanisms that significantly determine trustworthy sensor nodes are essential for maintaining potential connectivity and sustaining reliable data delivery in the energy-constrained self organizing WSN. In this paper, Fuzzy Technique of Order Preference Similarity to the Ideal Solution (TOPSIS)-based Secure Neighbor Discovery Mechanism (FTOPSIS-SNDM) is proposed for estimating the trust of each sensor node in the established routing path for the objective of enhancing reliable data delivery in WSNs. This proposed FTOPSIS-SNDM is proposed as an attempt to integrate the merits of Fuzzy Set Theory (FST) and TOPSIS-based Multi-criteria Decision Making (MCDM) approach, since the discovery of secure neighbors involves the exchange of imprecise data and uncertain behavior of sensor nodes. This secure neighbor is also influenced by the factors of packet forwarding potential, delay, distance from the Base Station (BS) and residual energy, which in turn depends on multiple constraints that could be possibly included into the process of secure neighbor discovery. The simulation investigations of the proposed FTOPSIS-SNDM confirmed its predominance over the benchmarked approaches in terms of throughput, energy consumption, network latency, communication overhead for varying number of genuine and malicious neighboring sensor nodes in network

STATISTICAL OPTIMIZATION AND EVALUATION OF ETHOSOMAL MICONAZOLE NITRATE SUSPENSION

Objective: The objectives of the present study were to optimize and evaluate the ethosomal suspension of miconazole nitrate for the treatment of local and systemic fungal infections. Methods: Miconazole topical formulation is prepared for better patient compliance and to reduce the dose of a drug. Miconazole nitrate ethosomes were prepared by the cold method using factorial designing with Ethanol(X1), IPA(Isopropyl alcohol)(X2), and Lecithin(X3) as Independent variables and % EE(Entrapment efficiency)(Y1) and % DR(drug release at 8th h)(Y2) was selected as responses. Results: The results obtained in the design showed that there was no significant interaction among factors. The lecithin concentration had a positive response on % EE, while ethanol concentration and IPA had a positive effect. For % DR, Ethanol, and IPA showed a positive effect and Lecithin had a negative response. The formulation EM22 (3 ml X1,3 ml X2 and 300 mg of X3) characterized by high % EE(77.3 %) and optimum % DR(94.2%) and formulation EM6 (2 ml X1,2 ml X2 and 100 mg of X3) characterized by high % DR(97.32 %) and optimum % EE (74.8 %). EM22 was incorporated in the gel as it is showing more entrapment efficiency and compared with the marketed product for drug release. Conclusion: From the result, it was concluded that formulated ethosomal suspension and optimized gel have more drug release than marketed formulation so that formulated suspension can be used for the preparation of antifungal gels, creams, ointments for sustained release

Abnormal hermaphroditic skipjack, Katsuwonus pelamis (Linnaeus, 1758) from Agatti coast, Lakshadweep, India

A hermaphroditic specimen of skipjack tuna, Katsuwonus pelamis of forklength (FL) – 56 cm and total weight (TW) – 3.20 kg was caught by pole and line on 21st November 2005 from the Agatti coast, Lakshadweep. Histological studies revealed that both the ovarian and testicular portions had developed a complete series of gametogenic cell lines

A STUDY ON DEVELOPMENT AND VALIDATION OF RP-HPLC METHOD FOR THE ESTIMATION OF CEFPODOXIME IN BULK AND A PHARMACEUTICAL DOSAGE FORMS

A simple, rapid, precise, sensitive and, reproducible reverse phase high performance liquid chromatography (RP-HPLC) method has been developed for the quantitative analysis of Cefpodoxime in a pharmaceutical dosage form. Chromatographic separation of Cefpodoxime was achieved on Waters Alliance -2695, by using Luna Pheny Hexyl (250mm x 4.6mm, 5µm) column and the mobile phase containing 0.1% TEA adj pH-2.5 with OPA & ACN in the ratio of 75:25% v/v. The flow rate was 1.0 ml/min, detection was carried out by absorption at 222nm using a photodiode array detector at ambient temperature. The number of theoretical plates and tailing factor for Cefpodoxime were NLT 2000 and should not be more than 2 respectively. The linearity of the method was excellent over the concentration range 7-105 µg/ml for Cefpodoxime respectively. The correlation coefficient was 0.999. % Relative standard deviation of peak areas of all measurements always less than 2.0. The proposed method was validated according to ICH guidelines.  The method was found to be a simple, economical, suitable, precise, accurate & robust method for quantitative analysis of Cefpodoxime and study of its stability

Bibliography on Tunas

Tunas, a very large and charismatic food fish with a wide distributional range, are valuable both in domestic and foreign markets and hence, play a vital role in the economies of many countries especially oceanic Islands. The oceanic waters adjoining the Asia-Pacific region contribute the bulk of the global tuna production. Although they constitute less than 5% of the world commercial catch by weight, they contribute much by dollar value (US $ 5.3 billion). Research and development efforts on tuna resources all over the world have contributed to a rapid growth of literature. The present bibliography is prepared to incorporate all the available publications including electronic references on this commercially important group, so that a large spectrum of researchers in this area would be benefited

Genetic variability for grain yield and water use efficiency in blackgram genotypes

Transpiration efficiency (TE, g biomass kg-1 water transpired) is the preferred measure for examining po- tential genetic variation in crop water use efficiency (WUE). TE was assessed gravimetrically from sowing to grain harvest in fifteen blackgram accessions, two checks and two local varieties under well-watered conditions during kharif season. TEbiomass varied from 2.87 - 5.27 g kg-1 and TEseed varied from 1.10 - 2.03 g kg-1 among genotypes. High coefficient of variability was observed for seed yield and TEseed.Total biomass, TEbiomass, HI and water transpired recorded medium coefficient of variability. High heritability in broad sense was observed for seed yield, TEseed and total biomass. High genetic advance as percent of mean was observed for seed yield, TEseed, total biomass and TEbiomass. High heritability coupled with high genetic advance as per cent of mean was observed for seed yield, total biomass and TEseed.TEseed is significantly positively correlated with TEbiomass (0.883**), seed yield/ plant (0.805**), HI (0.757**) and biomass (0.572*). TEbiomass, seed yield per plant, total biomass and HI were the important components of TEseed as revealed by correlation studies.D2 analysis partitioned the nineteen genotypes in to five clusters. The maximum inter cluster distance was observed between cluster II and V (24.94) and III and IV (22.6). Genotypes IC436665, IC343952 and Local II (Cluster III) had high mean values for TEbiomass and TEseed along with total biomass and seed yield. These genotypes should be useful in future breeding programs for higher water use efficiency