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Showing 1 to 20 of 72 for “"Chemical constituents"”.
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The chemical constituents of Knowltonia capensis.
… of this subfamily had not been subjected to chemical study. Thus a typical member of this genus, Knowltonia capensis, was examined for its chemical constituents. The plant was tested and was found to have antibiotic activity and possibly also antitumour activity, but this has still to be …
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The relation of soil characteristics and chemical constituents of soil solutions to the self corrosion of underground lead cable
… that they also effect corrosion products by chemical union with the cable sheath itself. From this study it is evident that the whole matter of the corrosion of lead in the soil is very complicated. Not only does the popular amphoteric character of this metal enter into the problem, but also …
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Science Based Authentication of Dietary Supplements: Studies on the Chemical Constituents, Analytical Method and Biological Activities of Scutellaria Spp and Pfaffia Paniculata
… limited science-based data exist to explicit its chemical constituents, pharmacological activities and toxicity. Therefore, lack of scientific evidence for herbal medicine usage elicits the need for systematic studies of herbal medicine, including phytochemical, analytical, and biological …
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Attractant properties of chemical constituents of the green macroalga Ulva and their response effects on the commercially important sea urchin Tripneustes gratilla
… of the feed, which is thought to be based on its chemical composition. Since an unpalatable feed will result in the poor quality of the organism, evaluating the palatability of sea urchin artificial feeds is important. In South Africa, the sea urchin Tripneustes gratilla has been selected for …
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SOME CHEMICAL CONSTITUENTS OF THE BROWN ALGA, AGARUM CRIBOSUM AND THE EFFECT OF ELECTROSTATIC INTERACTIONS ON THE STEREOCHEMISTRY OF THE S(N)2' REACTION
<p>Part 1. Some Chemical Constituents of the Brown Alga, Agarum cribosum. Agarum cribosum was examined for major chemical constituents. Halogenated terpenes found in red algae were not present in this seaweed. The sterol content was determined by GC/MS analysis and six sterols were identified: …
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Seaweed as a value-added product for the food and drink sector
… many seaweeds contain a broad range of chemical constituents that may have therapeutic properties. To date, seaweed has not been fully exploited as a food, in part because the chemical constituents they contain, and the bioactivity of these, have not been fully characterised.<br/>The …
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΩΝ ΧΗΜΙΚΩΝ ΣΥΣΤΑΤΙΚΩΝ ΤΩΝ ΦΥΛΛΩΝ ΤΟΥ ΦΥΤΟΥ CYNARA SCOLYMUS L.
IN THE PRESENT THESIS HAVE BEEN STUDIED THE CHEMICAL CONSTITUENTS OF THE LEAVESOF C. SCOLYMUS L. IN PETROLEUM-ETHER EXTRACT, THE FOLLOWING CONSTITUENTS WERE ISOLATED AND STUDIED: B- CAROTENE, STEROLS, FATTY ACIDS CARBO-HYDRATE (CIS-TRIAKONTANIO) [BY GLC PC, TLC, AND SPECTRA NMR, UV, IR]. IN THE …
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Desenvolvimento do método de extração em solução hexânica e identificação dos compostos do óleo de Melaleuca alternifolia.
… activities. The knowledge about plan t chemical constituents is important to discover the true value of herbal medi cines and to evaluate its toxicity. The improvement of methodologies and findings in or der to contribute to essential oil quality control has great value. The detection of …
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Analysis of coal combustion by-product disposal practices in an arid climate : leachate water quality
… and have elevated concentrations of hazardous constituents. There is concern that disposal of these materials in an unlined surface mine may cause ground and surface water contamination. This research project focused on determining the leachate characteristics from fresh unburied and old buried …
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ΜΕΛΕΤΗ ΤΩΝ ΧΗΜΙΚΩΝ ΣΥΣΤΑΤΙΚΩΝ ΤΟΥ ΦΥΤΟΥ GALIUM MELANANTHERUM BOISS
IN THE PRESENT THESIS HAVE BEEN STUDIED THE CHEMICAL CONSTITUENTS OF THE AERIALPARTS OF GALIUM MELANANTHERUM BOISS (RUBIACEAE FAM). USING THE TECHNIQUES PC, TLC, C.C, UV ABSORPTION SPECTROSCOPY, HYDROLYSIS, SUGAR ANALYSIS BY GLC, GLC, HPLC, NMR) THE FOLLOWING CONSTITUENTS WERE IDENTIFIED. IN THE …
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Investigations on Dry Beans (Phaseolus Vulgaris L.): Microstructure, Processing, and Antinutrients (Phytic Acid, Tanning, Enzyme Inhibitors)
… investigated. Most correlations between selected chemical constituents and physical characteristics were relatively low. Dry beans had a well-organized ultrastructure with all the characteristic features of a typical legume. Initial water uptake rates during soaking were characteristic of each …
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Thermal Analysis of Milkweed Floss Using TG/FTIR
… individual commercial samples of .similar chemical composition has been carried out. By combining a two-stage thermal process. (pyrolysis-combustion) with TG-FTIR, it has been possible to identify the major organic volatile products during pyrolysis and to correlate gas evolution with the …
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Natural Variability in Phenolic and Sesquiterpene Constituents Among Burdock (<i>Arctium lappa</i> L. and <i>Arctium minus</i> L.) Leaves for Potential Medicinal Interests
… were to: a) develop techniques to evaluate biochemical components of burdock leaves; b) characterize sources of variability in leaf composition; c) and evaluate the effects of horticultural management techniques (i.e., irrigation, irradiance, and temperature levels) on the biochemical profile …
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Experimental and theoretical investigation of transport phenomena in nanoparticle colloids (nanofluids)
… a nanoparticle colloid's mass loading, chemical constituents, particle size, and pH; to determine temperature and loading dependent viscosity and thermal conductivity; to determine convective heat transfer coefficient and viscous pressure losses in an isothermal and heated horizontal …
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The Effects of Urban Land Use Type on Low Order Stream Geochemistry, Columbus, Ohio
… land use types each contributes its own suite of chemical constituents. Some previous studies on urban impacts to streams have primarily examined the bulk chemical contributions to high order rivers and streams, while not focusing so strongly on the tributaries that control their chemistry. Small …
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Micromechanical Modelling of Wood and Fibre Properties
… modelling from the mechanical properties of the chemical constituents of the cell wall to the average mechanical properties of a growth ring. The models are based mainly on results of the experiments that were performed. Models of the microfibril in the cell wall as well as models of the cellular …
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Conservation Strategies of the Red Listed Brackenridgea zanguebarica Oliv. in Vhembe District Municipality, Limpopo Province, South Africa
… threats to the existence of B. zangueberica, the chemical constituents from the different plant parts, the propagation methods of the species, and the factors delaying the germination of its seeds. In this study, an assessment of the current population threats was important as a first step in …
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Studies on the Teichoic Acids of the Pneumococcus
… wall: (1) they are both composed of the same chemical constituents, including choline; (2) they are both cleaved by periodate and by nitrous acid into choline-containing fragments of similar size; (3) previous investigators demonstrated serological cross-reactivity between the two (Goebel, W. …
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