نتایج جستجو برای: natural sources
تعداد نتایج: 750646 فیلتر نتایج به سال:
Intro Social media, such as Twitter, has shown great potential to analyze real world events, such as politics, product sentiment and natural disasters. In recent years, social media has emerged in the health community, particularly in public health, as a revolutionary data source for a wide range of problems. Vast amounts of naturalistic population data can be collected through social media muc...
This article explains the need of high quality large lexicons describing syntactic properties of a natural language in order to accomplish various natural language processing tasks. Data sources useful to collect such lexicons for Czech are described and it is documented that the available treebank data are not a sufficient source. An approach to building such lexicons with the help of an autom...
and Warhanti Da for their excellent research assistance; and Denis Cogneau, Elise Huillery and the DIAL research team for sharing their data with us. Useful comments were received from members of the Working Group in African Political Economy and the Yale Program in Agrarian Studies.
The spread of multidrug-resistant strains of fungus and the reduced number of drugs available, makes it necessary to discover new classes of antifungals and compounds that inhibit these resistant mechanisms. This has led to a search for therapeutic alternatives, particularly among medicinal plants and compounds isolated from them used for their empirically antifungal properties. In these natura...
In nature, fructans are synthesized from sucrose by various microbial and plant species. Depending on the source, fructans can contain from two to more than a hundred thousand fructose units linked by β-(2→1) (inulin-type) or β(2→6) (levan-type) glycosidic bonds. Bacteria produce levan or inulin polymers via a one-enzyme process aimed to confer competitiveness in the interaction with the host p...
The rapid spread of bacteria expressing multidrug resistance (MDR) has necessitated the discovery of new antibacterials and resistance-modifying agents. Since the initial discovery of bacterial efflux pumps in the 1980s, many have been characterized in community- and hospital-acquired Gram-positive and Gram-negative pathogens, such as Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia c...
This review attempts to portray the discovery and development of anticancer agents/drugs from diverse natural sources. Natural molecules from these natural sources including plants, microbes and marine organisms have been the basis of treatment of human diseases since the ancient times. Compounds derived from nature have been important sources of new drugs and also serve as templates for synthe...
The term 'Zoopharmacognosy' was coined to describe the process by which wild animals select and use specific plants with medicinal properties against ailments and prevention of diseases. Early studies of zoopharmacognosy focused on the interactions between plants and the herbivores that consume them. The study of animal self-medication and ethno-medicinal practices may provide important leads t...
This paper presents the complete and consistent ontological annotation of the nominal part of WordNet. The annotation has been carried out using the semantic features defined in the EuroWordNet Top Concept Ontology and made available to the NLP community. Up to now only an initial core set of 1,024 synsets, the so-called Base Concepts, was ontologized in such a way. The work has been achieved b...
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