Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Chemical profile"”.
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Pheromones in Heliconius butterflies: Chemical ecology, genetics, and behaviour
Sex pheromones are chemical signals that mediate communication between males and females of a species and are important for mating. They have been well-studied in female moths, where females release volatile compounds to attract males over long distances. Butterflies fly during the day and were …
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Screening and Engineering Phenotypes using Big Data Systems Biology
… cellular growth with production of a desired chemical. This software, called OptQuick, provides advantages over contemporary software for the same purpose. OptQuick can run considerably faster and uses a free optimization solver, GLPK. Knockout strategies generated by OptQuick were compared to …
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The chemotherapeutic potential of Boswellia carterii oleoresins
… carterii is comparatively limited. Given the chemical profile of Boswellia varies considerably across species, B. carterii may be an underexploited therapeutic source. Therefore, this study aimed to evaluate the anti-cancer potential and chemical profile of B. carterii oleoresin. A methanolic …
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Creating a Map for Surgeons: Direct Blotting Assisted Stamping of Tissue for MALDI Imaging Mass Spectrometry
… of patterned surfaces able to obtain a chemical profile of tissue via direct contact imprinting. This can yield spatial chemical information about imprinted tissue histopathology without the need for embedding, sectioning, or storage. Multiple patterned surfaces have been explored, …
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Lead-Free Gunshot Residues as Forensic Evidence
… from the primer mixture eliminates a significant chemical marker vital to the legal precedent governing GSR analysis. The American Society for Testing and Materials (ASTM) standard ASTM E1588-95 is no longer applicable to such residues. With this emerging market, the forensic community must …
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Estudo ficoquímico e avaliação da atividade microbiológica de algas marinhas do gênero sargassum.
… nity for their great potential as a pr oducer chemicals for industrial , economic and medical - pharmacological interest in Brazi l, especially in the Northeast , there are few studies conducted for this purpose , our group being a pioneer in research fhytocheis try . Given the availabili ty …
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Impurity analysis of MDA synthesized from unrestricted compounds
… are readily available online. Examination of the chemical profile of products from these syntheses can provide information about the starting material and synthetic pathway. This provides valuable information regarding linking cases, and tracking and limiting the supply of reagents used in …
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The use of metabolomics tools to assess the therapeutic natural products of honey and propolis from Malaysia and New Zealand
… of honey and propolis extract.;However the chemical profiling of Malaysian honey and propolis has not been well studied. The composition of honey and propolis depends on its geographical origin and also on its botanical source. Furthermore, the extraction of secondary metabolites from …
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Variation in chemical components of aquacultured Ulva (Chlorophyta) in response to environmental variables
… literature review of relevant Ulva biology and chemical composition is included. Marine algae are known to produce a wide range of volatile organic compounds that are primarily used in chemical communications. These compounds are released in seawater and act as either pheromones or …
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Chemical Profiling of Ballistic Materials - Analysis of organic gunshot residue
Gunshot residue (GSR) is a complex chemical mixture that is created during the discharge of a firearm. Its detection and interpretation play a crucial role in the investigation of firearm incidents. Current GSR analysis is limited to inorganic GSR (IGSR), however, the evidential value could be …
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Dormancy and sprout control in root and tuber crops
… No consistent differences were found in chemical profile of peel among potato tubers of accessions with a range of dormancy characteristics. Although 1, 4-Dimethylnaphthalene has been identified as a natural sprout suppressant, it could not be detected in any accession even though …
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IN-DEPTH STUDY OF THE RELATIONSHIP BETWEEN PROTEIN MOLECULAR STRUCTURE AND THE DIGESTIVE CHARACTERISTICS OF THE PROTEINS IN DRIED DISTILLERS GRAINS WITH SOLUBLES
… consistent quality of these DDGS. Traditional chemical methods do not consider the inherent structural changes of feed ingredients. The objectives of this study were to investigate the nutritional value of triticale and triticale DDGS in terms of chemical profile, protein and carbohydrate …
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Computational Canopy Models For Precision Measurement And Adaptive Management Of Grapevine Performance
… models including: the relationship between the chemical profile of harvested fruit and the organoleptic qualities of a finished wine; a mechanistic understanding of key flavor and aroma compound biosynthesis; and the role of physical vineyard parameters in these biosynthetic processes. Any …
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Making Scents of Butterfly Pheromone Evolution
Insect chemical profiles are diverse and complex, reflecting the wide range of functions they serve. Volatile compounds are used in foraging, defence, and mating, and pheromones are particularly important to the lives of insects. These are chemical signals that mediate the behaviour of …
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The chemical composition, antimicrobial and antioxidant properties of the essential oils of Tulbaghia violacea Harv and Eucalyptus grandis W.Hill ex Maiden.
… This study was designed to evaluate the chemical composition, antioxidant and antibacterial activities of the essential oils hydrodistilled separately from the rhizomes of Tulbaghia violacea and the leaves of Eucalyptus grandis. Chemical profile of the oils were carried out using GC and …
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Pilot Study using Elemental Geochemistry as a Means of Discriminating Chert Stratigraphy in the Roberts Mountains Allochthon, Nevada
… geochemistry with the goal of developing a geochemical means to differentiate units. This detailed chemical profile will allow for the identification of unknown cherts through the use of chemical data instead of time intensive, and sometimes difficult fossil identification. The data set …
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Diel patterns of insect herbivory and plant secondary metabolites in understory shrubs on Barro Colorado Island
… have evolved a diversity of behavioral and biochemical counter-adaptations to these defenses. Despite that a significant portion of leaf area removal by insects in the tropics occurs at night, virtually all studies of chemically mediated interactions between herbivorous insects and their host …
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Strain Variation as a Window Into the Neural Logic of Drosophila Mate Choice
… discriminate females based on species-specific chemical cues. When given a choice between a conspecific and a female that produces a distinct hydrocarbon profile, they strongly prefer to court the conspecific. However, they show little preference between courting a conspecific and heterospecific …
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Carbon dynamics in coastal vegetated communities: evaluation of anthropogenic impacts, chemical characterization of dissolved organic matter, and its influence on blue carbon sequestration
… communities in the Bay of Cádiz has been chemically characterized. In chapter 1, the direct impact of the construction of several coastal infrastructures on the organic carbon stocks of the meadows of Zostera noltei in Ria Formosa (Portugal) was studied. In this study was observed that …
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ACCELLERATED SELF-LIFE TESTING OF COFFEE: THE ROLE OF INNOVATIVE FLEXIBLE PACKAGING MATERIALS ON OXIDATION AND SHELF-LIFE ESTIMATION WITH A SIGHT ON THEIR ENVIRONMENTAL SUSTAINABILITY.
… packaging industry. Coffee's unique sensory and chemical profile is highly sensitive to environmental conditions, including oxygen, humidity, and temperature. These factors accelerate degradation processes, such as oxidation, leading to a decline in aroma, flavour, and shelf life. The development …
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