Voltammetric investlgations of iodide catalysed reduction of iodate and periodate ions on glassy carbon electrodes in 0.5m HClO4 medium

fr d.SM VrC!04 medium, KI exhibits two oxidation voltammetric peaks around 0.50V and 1.00V vs SCE on glassy cabon (GC) electrodes. The first wave corresponding to I-/ H l2 couple is highly reversible. The second wave corresponding to HI2/10- couple shows quasireversible behaviour. K103 shows an irreversible diffusion controlled wave on GC electrode around 0.16V in the first cathodic sweep. In the subsequent sweeps the reduction process commences at about 0.30V itself. The fact that this is due to the I- catalysis of 103- reduction is confirmed by studying the effect of KI addition on this process. Such type of I- catalysis is even more pmnounced in the case of 104- reduction. In this case the catalytic shift is as much ss O.4N. Possible causes for such I- catalysis is also discussed

An unusual occurrence of Oil Sardine in Pondicherry on east coast of India

The Indian oil sardine, Sardinella longiceps Valenciennes which forms 10 to 18% of the total fish landings in India, usually occurs in shoals along the west coast of India. Only stray catches of oil sardine have been reported from the east coast. But there has been noleport of its occurrence along the Pondicherry coast. During October-December, 1983 unusual landing of oil sardine in good quantities were noticed in Pondicherry state. During this period an sonivellam alias thenlivellam (drift flowing towards north) was strong instead of the usual southward drift (vannivellam). This was an unusual feature at this coast during monsoon months especially in November. This feature might have been a cause for the abundance of oil sardine in large quantities along the Pondicherry coast

Biporous Metal-Organic Framework with Tunable CO2/CH4 Separation Performance Facilitated by Intrinsic Flexibility.

In this work, we report the synthesis of SION-8, a novel metal-organic framework (MOF) based on Ca(II) and a tetracarboxylate ligand TBAPy4- endowed with two chemically distinct types of pores characterized by their hydrophobic and hydrophilic properties. By altering the activation conditions, we gained access to two bulk materials: the fully activated SION-8F and the partially activated SION-8P with exclusively the hydrophobic pores activated. SION-8P shows high affinity for both CO2 ( Qst = 28.4 kJ/mol) and CH4 ( Qst = 21.4 kJ/mol), while upon full activation, the difference in affinity for CO2 ( Qst = 23.4 kJ/mol) and CH4 ( Qst = 16.0 kJ/mol) is more pronounced. The intrinsic flexibility of both materials results in complex adsorption behavior and greater adsorption of gas molecules than if the materials were rigid. Their CO2/CH4 separation performance was tested in fixed-bed breakthrough experiments using binary gas mixtures of different compositions and rationalized in terms of molecular interactions. SION-8F showed a 40-160% increase (depending on the temperature and the gas mixture composition probed) of the CO2/CH4 dynamic breakthrough selectivity compared to SION-8P, demonstrating the possibility to rationally tune the separation performance of a single MOF by manipulating the stepwise activation made possible by the MOF's biporous nature

On the recent Introduction of outboard engines along the Coromandal coast

Introduction of outboard engines along the Coromandal coast and Pondicherry were studied. A total number of 232 outboard engines have been introduced at 16 fish landing centres in the South Arcot District. The outboard engines are fitted exclusively to catamarans with a length range of 8-10 m operating mainly gill nets, Pannu valai and Mani valai and the encircling bag-net, Eda valai

Construction delays causing risks on time and cost - a critical review

There is an increase in the number of construction projects experiencing extensive delays leading to exceeding initial time and cost budget.  This paper reviews 41 studies around the world which surveyed the delay factors and classified them into Groups.  The main purpose of this paper is to review literature, each of which have categorized the causes that are responsible for time delays and cost overrun in projects. The collected list has 113 causes for delays categorized in to 18 different groups.  Most of the researches have analysed the responses from the Questionnaire survey.    The collected data are used to rank the problem.  The data are further used to investigate and analyse Important Index, Frequency Index, Severity Index, Relative Important Index, Relative Importance Weight, Weighted Average, Mean, Standard Deviation and Variance.  The collective comparison has revealed that the ranking given by all the researchers is not the same.  Further each and every study has different rank ratings for the different group of the delays.  This review paper attempts to provide an updated compilation of the earlier studies on ranking of the delay causers, which are never similar and constant for universal projects.  It is concluded that a separate study is required for identifying the factors causing delay for projects operated in Sabah, East Malaysia

Major and minor fisheries harbours of India. 7. The fisheries harbours and fishery along the north Tamilnadu and south Andhra Pradesh coasts

There are four functional fisheries harbours in the north Tamil Nadu-south Andhra Pradesh coast, viz., Chennai (major), Nizampatnam, Cuddalore and Pazhayar (minor). A medium harbour in Pondicherry is under construction. There is a temporary jetty in Krishnapatnam and a fish landing platform in Pulicat

Prospective Study of the Diagnostic Accuracy of the In Vivo Laser Scanning Confocal Microscope for Severe Microbial Keratitis.

To determine the diagnostic accuracy of in vivo confocal microscopy (IVCM) for moderate to severe microbial keratitis (MK). Double-masked prospective cohort study. Consecutive patients presenting to Aravind Eye Hospital, Madurai, India, between February 2012 and February 2013 with MK (diameter ≥3 mm, excluding descemetocele, perforation, or herpetic keratitis). Following examination, the corneal ulcer was scanned by IVCM (HRT3/RCM, Heidelberg Engineering, Heidelberg, Germany). Images were graded for the presence or absence of fungal hyphae or Acanthamoeba cysts by the confocal microscopist who performed the scan (masked to microbial diagnosis) and 4 other experienced confocal graders (masked to clinical features and microbiology). The regrading of the shuffled image set was performed by 3 graders, 3 weeks later. Corneal-scrape samples were collected for microscopy and culture. The main outcome measures were sensitivity, specificity, and positive and negative predictive values of IVCM compared with those of a reference standard of positive culture or light microscopy. Sensitivities and specificities for multiple graders were pooled and 95% confidence intervals calculated using a bivariate random-effects regression model. The study enrolled 239 patients with MK. Fungal infection was detected in 176 (74%) and Acanthamoeba in 17 (7%) by microbiological methods. IVCM had an overall pooled (5 graders) sensitivity of 85.7% (95% confidence interval [CI]: 82.2%-88.6%) and pooled specificity of 81.4% (95% CI: 76.0%-85.9%) for fungal filament detection. For Acanthamoeba, the pooled sensitivity was 88.2% (95% CI: 76.2%-94.6%) and pooled specificity was 98.2% (95% CI: 94.9%-99.3%). Intergrader agreement was good: κ was 0.88 for definite fungus; κ was 0.72 for definite Acanthamoeba. Intragrader repeatability was high for both definite fungus (κ: 0.88-0.95) and definite Acanthamoeba classification (κ: 0.63-0.90). IVCM images from 11 patients were considered by all 5 graders to have a specific organism present (10 fungus, 1 Acanthamoeba) but had negative results via culture and light microscopy. Laser scanning IVCM performed with experienced confocal graders has high sensitivity, specificity, and test reproducibility for detecting fungal filaments and Acanthamoeba cysts in moderate to large corneal ulcers in India. This imaging modality was particularly useful for detecting organisms in deep ulcers in which culture and light microscopy results were negative