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Showing 1 to 20 of 215 for “"Active compounds"”.
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Biologically Active Compounds From Caribbean Sponges
… sponges is described. Interest in these compounds was motivated by the acid's pharmacological activities when tested in vitro against various gram positive bacteria, yeasts and fungi. The corresponding esters were relatively inactive as antibacterial agents but because they were more …
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Biologically active compounds from tunicates and a sponge
… structure-activity relationships for the above compounds are described.
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CHEMOENZYMATIC APPROACHES TO THE PREPARATION OF BIOLOGICALLY ACTIVE COMPOUNDS
Biologically active compounds are usually polyfunctional molecules bearing one or more stereocenters. Enzyme catalyzed transformations are well suitable for their preparation since they act in a very mild and selective manner. The study of three selected biocatalyzed transformations has been the …
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Biologically active compounds from a clam and a tunicate
… of L1210 murine leukemia cells in which the compounds develop sharp points, usually located opposite to each other. The compounds responsible for this activity, spisulamines 285, 299 and 313 were isolated and characterized along with sphingosine and several of its analogs. The spisulamines …
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Metabolism and disposition of active compounds of botanical dietary supplements.
Metabolism and disposition of active compounds of botanical dietary supplements.
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TOOLS AND STRATEGIES FOR THE SYNTHESIS OF PHARMACEUTICAL ACTIVE COMPOUNDS
… for the synthesis of potential pharmaceutical active compounds. In this context, I commenced my research at the University of Milano under the supervision of Professor Daniele Passarella. My work centered on two main projects involving the design, synthesis, and characterization of new …
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Sensorial characteristics of odour active compounds from raw natural rubber
… stage affect the emission of malodorous sulfur compounds. A significant amount of sulfurs were retained in the solids and carried through to the final dried products. Gas chromatography-mass spectroscopy (GC-MS) and gas chromatography-sulfur chemiluminescence detector/nitrogen chemiluminescence …
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Positron Annihilation at the Chiral Center of Optically-Active Compounds
Made available in DSpace on 2014-12-13T20:10:19Z (GMT). No. of bitstreams: 1 7804165.pdf: 3642069 bytes, checksum: e2e50000bb7c99214fabe1543b5c4c0e (MD5) Previous issue date: 1977
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Production of bio-active compounds from ferulic acid using biocatalysis
Includes bibliographical references (p. [181]-203).
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Microwave-Mediated Hetero Diels-Alder reaction: Synthesis of biologically active compounds
Heterocyclic compounds represent almost two-thirds of all the known organic compounds: they are widely distributed in nature and play a key role in a huge number of biologically important molecules including some of the most significant for human beings. A powerful tool for the synthesis of such …
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A comparison of sulfhydryl active compounds on activation and germination of Bacillus thuringensis spores
… cereus 569 were incubated in various sulfhydryl active compounds in order to compare the effects of these compounds on activation and germination. The sulfhydryl active compounds used were oxidized lipoic acid and cystine (S-S), cysteine HCl and dithiothreitol (S-H). B^. thuringiensis spores …
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Mechanisms Of Smoke-Elicited Seed Germination Responses and Possible Candidate Active Compounds In Smoke
… at 25/15 °C in darkness, was used to identify active fractions and compounds derived from alfalfa smoke solution. Fractions were prepared by reversed phase separations (resin and C18 RP-CC), and compounds present were determined by HPLC, GC-MS and NMR and comparison of spectra with library …
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Broad Spectrum Methods for the Resolution of Optically-Active Compounds--Application to the Synthesis of Natural Products
Made available in DSpace on 2014-12-13T20:10:12Z (GMT). No. of bitstreams: 1 7804019.pdf: 4454246 bytes, checksum: a67bffbe20e0a11436e4a3ea06dfab32 (MD5) Previous issue date: 1977
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Part 1. Biologically Active Compounds From Agelas Sponges. Part 2. Barnacle Settlement Inhibitors From Octocorallia (Antifouling, Antibacterial, Renillafoulins, Antiviral, Caribbean)
Biologically active extracts of the Caribbean sponges Agelas coniferin and Agelas cf. mauritiana have been found to contain seven new bromopyrroles (1a, 3a-8a), as well as the known debromooroidin-dimer sceptrin (2a). These compounds, isolated as the diacetate salts, were found to be antibacterial …
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Quantitative analysis of active compounds found in Arnica montana and Arnica chamissonis in relation to varied provenance, environmental and agronomic factors.
… as a source of natural products, particularly, active compounds associated with antiinflammatory properties. The high demand for this extract has meant that wild plant numbers have reduced dramatically and now in many countries, it is illegal to harvest A. montana from the wild. As a result, …
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Vibrational characterisation of coordination and biologically active compounds by means of IR absorption, Raman and surface-enhanced Raman spectroscopy in combination with theoretical simulations
… investigations on different coordination compounds performed by using infrared absorption and FT-Raman spectroscopy in combination with density functional theory calculations. In the first section of this part the starting materials Ph2P-N(H)SiMe3 and Ph3P=NSiMe3 and their corresponding …
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UV-assisted isomerization studies of active compounds in bush tea (Athrixia phylicoides) leaf extracts and investigations of their potential to inhibit acid corrosion of mild steel and zinc
… to investigate the geometric isomerization of compounds within plant extracts, aiming to identify and quantify different isomers and understand the conditions influencing their stability and transformation. Gravimetric analysis (GA), Electrochemical Impedance Spectroscopy (EIS), and …
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Decoding the Flavor of Kentucky's Native Pawpaw Fruit
… fruit, to identify and quantitate the aroma-active compounds that are present. Gas chromatography – olfactometry (GC-O) was applied on capillary GC columns with various means of extraction. The volatile compounds present were extracted using both headspace solid phase micro-extraction …
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Antiplasmodial neolignans from Trema orientalis : identification, synthesis and analogue generation.
… as a potential source of new antimalarial lead compounds. Organic extracts of the young growing twigs of T. orientalis were reproducibly shown to be active against the chloroquine-sensitive (D10) and chloroquine resistant (K1) strains of Plasmodium falciparum. The 8-O-4' oxyneolignans, dadahols …
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