991 resultados para Edwards, Tom
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Receipt from Tom Hibbard regarding payment for mortar and brick work, July 4, 1876.
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Questions put to Edwards [illegible] (2 double-sided pages, handwritten).These pages are stained and slightly torn. This affects a small portion of the text, 1830.
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Tesis ( Maestro en Ciencias de Producción Agrícola) U.A.N.L.
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UANL
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UANL
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UANL
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Depuis les années 90, les Projets Intégrés de Conservation et Développement ont été présentés comme des modèles fonctionnels de développement durable pour un site spécifique dans une perspective de réalisation. Le but est d’intégrer les objectifs biologiques de la conservation aux objectifs sociaux et économiques du développement. Ces projets, qui répondent à de multiples dénominations et stratégies, sont implantés dans des contextes naturellement hétérogènes et dynamiques, où l’aménagement du territoire ne doit pas être un outil de planification étatique, désigné et imposé dans une logique conservationniste. Les aires protégées représentent une certaine vision du rapport entre l’être humain et la nature, apparue dans le contexte nord-américain avec la création des premiers grands parcs nationaux en 1870. Aujourd'hui, la forte volonté d'impliquer la population se heurte avec la difficulté de concilier la gestion de ces espaces avec les pratiques, les nécessités et les intérêts locaux. Le parc naturel Obô, qui occupe 30% du territoire de São Tomé et Principe, doit affronter la difficile intégration entre les représentations de la nature et les usages locaux avec les objectifs globaux des politiques conservationnistes, ainsi qu’avec les intérêts touristiques et économiques des investisseurs locaux et étrangers. Les représentations sociales de la nature, établissant une forme de connaissance pratique, déterminent la vision du monde et la relation qu'un certain groupe social peut avoir avec le territoire. Ainsi, chaque communauté possède ses propres mécanismes d'adaptation au milieu basés sur ce système représentationnel. Dans le cas des communautés sãotoméennes, la nature présente un caractère spirituel (associé à des croyances, des rites et des pratiques médicales traditionnelles) et utilitaire (la nature, à travers l'agriculture, la récolte ou la chasse, répond au besoin de subsistance). L’objectif de ce projet de thèse est donc de mieux comprendre la synergie existante entre savoir endogène et gestion de la biodiversité pour adapter l’aménagement du territoire à la réalité des populations qui y vivent.
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This work envisages the fermentation of prawn shell waste into a more nutritious product with simpler components for application as a feed ingredient in aquaculture. This product would be a rich source of protein along with chitin, minerals, vitamins and N-acetyl glucosamine. A brief description of the various processing (chemical and bioprocess) methods employed for chitin, chitosan and single sell protein preparations from shell waste. It deals with the isolation of micro flora associated with prawn shell degradation. It describes the methods adopted for fermentation of prawn shell degradation and fermentation of prawn shell waste with the selected highly chitinoclastic strains. The comparison of SSF and SmF for each selected strain in terms of enrichment of protein, lipid and carbohydrate in the fermented product was done. Detailed analysis of product quality is discussed. The feed for mulation and feeding experiment explained in detail. Statistical analysis of various biogrowth parameters was done with Duncan’s multiple range test. Very briefly explains 28 days of feeding experiment. A method for the complete utilization of shell waste explains with the help of experiments.
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Heterotrophic bacterial flora of Pmonadon from an apparently healthy hatchery system as well as a pool with heavy mortality were isolated and studied. In the healthy systems comparatively higher generic diversity with Pseudomonas, Acinetobacter, Bacillus, Micrococcus, members of the family Enterobacteriaceae and coryneform group in the diminishing order of dominance was recorded. Meanwhile from the moribund larvae and rearing water Aeromonas and Pseudomonas could be isolated in almost equal proportions. Strikingly, Aeromonas could not be isolated from the apparently healthy larval rearing system and its exclusive occurrence in the sick culture system in comparatively higher percentage suggested its possible role in the mortality. They were found to be highly halophilic exhibiting growth at 10% NaCl. On testing their sensitivity to twenty antibiotics, four of them (Streptomycin, Gentamycin, Methamine mandelate and Cloramphenicol) were found to be effective on all the isolates of Aeromonas and Pseudomonas suggesting their possible application in the hatchery system in times of emergency. While doing so, Streptomycin would do comparatively better than the others as the minimum inhibitory dose required was comparatively lower (200ppm) within a period of 24 hours
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The thesis contains the results of an investigation on the " Population Genetic Structure of the Penaeus indicus " from southeast and southwest coasts of India. The P.indicus, popularly known as the Indian white prawn, is distributed widely in the Indo-Pacific, starting from New South wales in Australia in the east to the east coast of Africa in the west. Its heavy demand in the export market, the species has been exploited intensively from all along its areas of distribution in Indian waters. The population genetic characteristics of the species were examined by three independent but complementary techniques, namely, morphometrics (truss network), biochemical genetics (isozyme electrophoresis ) and molecular genetics (RFLP and RAPD). The east and west coast populations of the species may be genetically different. Due to certain constraints, the results obtained from the studies of restriction fragment length 70 polymorphism (RFLP) were limited. The significant difference in the number of bands in the sample populations strongly suggests that these two populations have considerably different population genetic structures
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The investigation was aimed at establishing the effect of salinity on the culture performance of Peneus Indicus in pokkali fields and also to find out the growth performance of the shrimp at varying salinities. The experiments were laid out at Rice Research Station, Vyttila of Kerala Agriculture University in three fields of area 1000 m2 each. The results of the experiment clearly establish that shrimps when stocked at higher salinity (20-25 ppt) for 45 days has given higher growth, survival and production than those stocked at lower salinity (10-15 ppt) in all the above parameters even when the culture experiment was maintained for longer periods in lower salinity. In the prolonged culture experiments conducted for 120 days in 10-25 ppt salinity, the results were poorer than the short period culture in higher salinity and the production values similar to lower saline culture. This clearly establishes the importance of salinity as an ecological factor which will have profound influence in shrimp farming operations.
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The present study is an attempt to find out the ralation between RNA/DNA ratio, protein,percentage growth rate and specific growth rate of prawn,Penaeus indicus with respect to Nervous system, Eyestalk and Muscle tissues during ontogenesis. We have isolated and purified a natural agglutinin in the hemolymph of P.indicus with antigenecity, agglutinating, hemolytic and antibacterial properties. The influence of growth and environmental parameters on the level of agglutinin in the hemolymph was studied. Agglutinin concentration during normal growth process was compared. The agglutinin concentration in the hemolymph was quantified through developing ELISA, which is useful in health monitoring studies of individual species. Complete amino acid composition of both the subunits of P.indicus agglutinin were analysed. P.indicus agglutinin showed similarity to those proteins having antigenecity,hemolytic and agglutinating properties.Hence, agglutinin was considered as a natural defence protein in the hemolymph of P.indicus responsible for immune surveillance. The humoral defence mechanism of agglutinin was a co-operative effort with hemocytes and complement system. The composition of isolated agglutinin of P.indicus amino acids will be helpful in the synthesis of new antibacterial analogues which can be used against disease causing organisms.