Comparative larval biology of three Macrobrachium species under controlled conditions

Three large sized Macrobrachium species-. viz. Macrobrachium rosenbergi;, M malcolmsonii and M gangelicum are available in Indian riverine systems. The study on the seed production and growout of these species are being carried out to develop technologies for commercial application. Hence, the knowledge on comparative larval biology of the three species is extremely important to give a new line for developing hatchery technology for large-scale seed production in different agro-climatic conditions. The present communication deals with comparative study of larval growth and seed production of the three larger species

Olfactory perireceptor and receptor events in moths: a kinetic model revised

Modelling reveals that within about 3 ms after entering the sensillum lymph, 17% of total pheromone is enzymatically degraded while 83% is bound to the pheromone-binding protein (PBP) and thereby largely protected from enzymatic degradation. The latter proceeds within minutes, 20,000-fold more slowly than with the free pheromone. In vivo the complex pheromone–PBP interacts with the receptor molecule. At weak stimulation the half-life of the active complex is 0.8 s due to the postulated pheromone deactivation. Most likely this process is enzymatically catalysed; it changes the PBP into a scavenger form, possibly by interference with the C-terminus. The indirectly determined PBP concentration (3.8 mM) is close to direct measurements. The calculated density of receptor molecules within the plasma membrane of the receptor neuron reaches up to 6,000 units per μm2. This is compared with the estimated densities of the sensory-neuron membrane protein and of ion channels. The EC50 of the model pheromone–PBP complex interacting with the receptor molecules is 6.8 μM, as compared with the EC50 = 1.5 μM of bombykol recently determined using heterologous expression. A possible mechanism widening the range of stimulus intensities covered by the dose–response curve of the receptor-potential is proposed

CURATION AND MANAGEMENT OF CULTURAL HERITAGE THROUGH LIBRARIES

Libraries, museums and archives hold valuable collections in a variety of media, presenting a vast body of knowledge rooted in the history of human civilisation. These form the repository of the wisdom of great works by thinkers of past and the present. The holdings of these institutions are priceless heritage of the mankind as they preserve documents, ideas, and the oral and written records. To value the cultural heritage and to care for it as a treasure bequeathed to us by our ancestors is the major responsibility of libraries. The past records constitute a natural resource and are indispensable to the present generation as well as to the generations to come. Libraries preserve the documentary heritage resources for which they are primarily responsible. Any loss of such materials is simply irreplaceable. Therefore, preserving this intellectual, cultural heritage becomes not only the academic commitment but also the moral responsibility of the librarians/information scientists, who are in charge of these repositories. The high quality of the papers and the discussion represent the thinking and experience of experts in their particular fields. The contributed papers also relate to the methodology used in libraries in Asia to provide access to manuscripts and cultural heritage. The volume discusses best practices in Knowledge preservation and how to collaborate and preserve the culture. The book also deals with manuscript and archives issues in the digital era. The approach of this book is concise, comprehensively, covering all major aspects of preservation and conservation through libraries. The readership of the book is not just limited to library and information science professionals, but also for those involved in conservation, preservation, restoration or other related disciplines. The book will be useful for librarians, archivists and conservators. We thank the Sunan Kalijaga University, Special Libraries Association- Asian Chapter for their trust and their constant support, all the contributors for their submissions, the members of the Local and International Committee for their reviewing effort for making this publication possible

Studies on certain aspects of root surface fungi IV. Succession of fungi on Pennisetum typhoides in fertilized soils

The mycoflora and its succession on decomposing roots of P. typhoides of plots fertilized with urea, ammonium sulphate, superphosphate, organic manure, fresh leaves and twigs of Ipomoea fistulosa and irrigated has been investigated. Fungi were higher on fertilized plots, both a root surface and away from it (the control). Highest and lowest population were recorded soils fertilized with organic manure and I. fistulosa. The amino acids and sugars, cellulose, hemicellulose and lignin components of the roots from fertilized and control plots has been estimated and a correlation between mycoflora succession and the above components has been established

Studies on phyllosphere Fungi. IV. Effect of magnesium chloride on phyllosphere population of virus infected (PVX) and healthy plants of Lycopersicum esculentum Mili. cv. Best of all

Phyllosphere and phylloplane mycoflora of healthy and potato virus X (PVX) infected plants of Lycopesicum esculentum in relation to the treatment of different concentrations of magnesium chloride has been investigated. 250 ppm MgO2 level resulted to the maximum fungal population on the leaf surface of healthy and diseased plants. 125 ppm concentration of MgO2. on the other hand favoured the maximum fungal colonization on phylloplane region in both healthy and diseased plants. In both, healthy and diseased plants, 125 ppm concentration of MgCl2 proved equally good for growth of plants and the chlorophyll content of the leaf. The variation in the leaf mycoflora in the present study seems to be governed by a number of factors operating simultaneously

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Resonant frequency of circular microstrip antenna using artificial neural networks

204-208A novel method of using artificial neural networks (ANNs) for the calculation of the resonant frequency of electrically thick and thin circular microstrip patch antenna has been adopted in this paper. It is useful for the computer-aided design (CAD) of microstrip antennas. The results obtained using ANNs are compared with the measured and calculated values reported by other authors. The theoretical resonant frequency values obtained using ANNs are in very good agreement with measured and calculated values reported by other researchers