Search results for "niger"
showing 10 items of 171 documents
Wole Soyinka: Due Poesie
2008
Durante l'undicesima edizione del Festivaletteratura di Mantova, nel settembre 2007, Wole Soyinka, insieme alla studiosa e traduttrice Alessandra Di Maio, ha ripercorso la sua carriera poetica, spiegandone svolte e sviluppi. In questa sede si riportano due delle sue poesie più note in traduzione -- "Conversazione telefonica" e "I figli di questa terra" -- che coprono idealmente l'arco della sua produzione poetica, dalla gioventù all'eta matura.
Understanding the influence of context in technology integration from teacher educators’ perspective
2021
The perspective of teachers is important for advancing the use of technology in classrooms. A considerable number of research studies have explained context in ways that have narrowed the understanding of its impact on successful technology integration. This study employs the Technological Pedagogical and Content Knowledge (TPACK) model as a lens in understanding factors influencing teachers’ integration of technology in classrooms. Data were collected using focused interviews of 19 teacher educators of three colleges of education from the southern part of Nigeria. The results reveal that among the level contexts, the meso level presented the most challenges to teachers’ efforts at integrat…
Chemical Composition of the Essential Oil of Bupleurum Fontanesii (Apiaceae) Growing Wild in Sicily and its Activity on Microorganisms Affecting Hist…
2016
Hydrodistillation of the flowers (BpFl) of and fruits (BpFr) of Bupleurum fontanesii Guss. ex Caruel gave two oils that were analyzed by GC and GC-MS. The main components were α-elemol (16.7%), caryophyllene oxide (16.4%) and heptacosane (15.9%) in BpFl, and spathulenol (16.8%), caryophylladienol I (13.2%) and α-elemol (12.8%) in BpFr. A good antimicrobial activity against several microorganisms, including Bacillus subtilis, Staphylococcus aureus, Fusarium oxysporum and Aspergillus niger, all infesting historical art craft, was also determined.
Fatal delayed diagnosis in a patient with Falciparum malaria.
2004
This is a classical case of blackwater fever which is one of the most serious hematologic complications of falciparum malaria. The clinical manifestations of this acute intravascular hemolityc anemia are fulminating and delayed diagnosis is an important cause of mortality.
Synthesis of Isomaltooligosaccharides by Saccharomyces cerevisiae Cells Expressing Aspergillus niger α‑Glucosidase
2017
The α-glucosidase encoded by the aglA gene of Aspergillus niger is a secreted enzyme belonging to family 31 of glycoside hydrolases. This enzyme has a retaining mechanism of action and displays transglycosylating activity that makes it amenable to be used for the synthesis of isomaltooligosaccharides (IMOs). We have expressed the aglA gene in Saccharomyces cerevisiae under control of a galactose-inducible promoter. Recombinant yeast cells expressing the aglA gene produced extracellular α-glucosidase activity about half of which appeared cell bound whereas the other half was released into the culture medium. With maltose as the substrate, panose is the main transglycosylation product after 8…
Die Glucose-Oxydasen aus Penicillium notatum (Notatin) und Aspergillus niger (Nigerin) I. Isolierung und einige molekulare eigenschaften
1965
Summary By chromatography on carboxymethyl- and diethylaminoethyl-Sephadex pure preparations of the glucose oxidases ( β - d -glucose: oxygen oxidoreductase, EC 1.1.3.4) notatin from Penicillium notatum and nigerin from Aspergillus niger could be obtained. Differences in the binding to the cation- and anion-exchangers indicate that these two glucose oxidases differ markedly with respect to the structures of the respective apoenzymes. A mixture of notatin and nigerin can easily be separated by chromatography. Moreover, there are also structural differences in the neighbourhood of the prosthetic flavin-adenine dinucleotide groups. The flavin-adenine dinucleotide spectrum of notatin is shifted…
Information systems development in developing countries : risk management and sustainability analysis in Nigerian software companies
2002
The expectations of IT for socio-economic and human development in developing countries have been high, but the real benefits and the positive impacts have been somewhat disappointing. The harsh socio-economic and infrastructural context makes the sustainability of an IS a major issue. Technology transfer to Africa has been too dependent on external factors, like international aid donors, and emphasized on technology itself. There is a need for locally developed, appropriate information systems, which are based on local needs and structures. In addition, the development should be done by using appropriate methods in an African context. This thesis is part of the INDEHELA-Methods project, wh…
Prefazione al romanzo di Jumoke Verissimo, Memoria e desiderio
2021
A well established and renowned poet residing in Canada, Jumoke Verissimo debuted with her first novel, A Small Silence, in 2019. The Preface to the Italian edition elucidates how in Verissimo's fictional account of a dissident intellectual released from prison after the end of Abacha's dictatorship, and in his friendship with a young woman studying at the local University, we find a portrait of today's Nigeria trying to survive its post-independence, post-colonial, post-dictatorship era.
Isolation and characterization of a chlorogenic acid esterase from Aspergillus niger.
1980
Abstract The isolation and characterization of a specific chlorogenic acid esterase is described. The enzyme activity is measured by determination of the hydrolysis product caffeic acid. The enzyme had been concentrated by means of ultrafiltration and column-chromatography. The pH- and temperature optimum were 6.5 and 45 °C respectively. Divalent cations were not required for the enzyme activity. As other esterases, this enzyme is inhibited by di-isopropyl-phosphorofluoridate. The Km-value is 0.70 mᴍ chlorogenic acid, the molecular weight 240000. The described enzyme is specific for chlorogenic acid. On the other hand a typical unspecific esterase like the pig liver esterases does not split…
Association between Conflict and Cholera in Nigeria and the Democratic Republic of the Congo
2022
Cholera outbreaks significantly contribute to disease mortality and morbidity in low- and middle-income countries. Cholera outbreaks have several social and environmental risk factors and extreme conditions can act as catalysts. A social extreme with known links to infectious disease outbreaks is conflict, causing disruption to services, loss of income and displacement. Here, we used the self-controlled case series method in a novel application and found that conflict increased the risk of cholera in Nigeria by 3.6 times and 19.7% of cholera outbreaks were attributable to conflict. In the Democratic Republic of Congo (DRC), conflict increased the risk of cholera by 2.6 times and 12.3% of ch…