Search results for "NIGER"
showing 10 items of 171 documents
On the Relationship between Jetted Inks and Printed Biopatterns:Molecular-Thin Functional Microarrays of Glucose Oxidase
2009
Arrays of circular spots of glucose oxidase have been obtained on functionalized silicon oxide by piezoelectric inkjet printing and the enzymatic activity toward glucose recognition has been monitored. The addition of glycerol to the molecular ink allows to obtain high spot definition and resolution (tens of micrometers wide; one molecule tall), but in spite of its well-known structural stabilizing properties, in dynamic conditions it may lead to increased protein stresses. The jetting voltage and pulse length have been found to be critical factors for both activity retention and pattern definition. High voltages and pulse lengths results in stress effects along with the loss of activity, w…
Motherhood in the Context of Human Trafficking and Sexual Exploitation
2020
This book discusses motherhood of Nigerian and Romanian women in Italy and Romania, who are human trafficking victims for sexual purposes. It provides a broad gender approach to emerge on the phenomenon of human trafficking with an analytic perspective of all the social, cultural, legal and economic components that play an important role during all phases of motherhood. The book compares the motherhood of these two nationalities within a context of an illegal/legal status in the European territory. It reflects on the used terms of vulnerability, sexual exploitation, victim, resistance and resilience. This book enlightens scholars and students with a broad perspective on this complex phenome…
Feromonu un maršruta atmiņas loma kolektīvo lēmumu pieņemšanā melnajai skudrai Lasius niger (Linnaeus, 1758)
2015
Skudru kolonijās feromonu takas ir viens no galvenajiem mehānismiem, kas izmantoti kolektīvo lēmumu pieņemšanā. Tomēr daudziem sociālajiem kukaiņiem ir labi attīstīta atmiņa, kas var darboties arī kā orientieris. Šajā pētījumā tiek atdalīts atmiņas un feromonu efekts uz barotnes izvēli, eksperimenta pirmajā fāzē ļaujot Lasius niger skudru kolonijām iegaumēt un izveidot feromonu taku uz 0,5 M saharozes šķīdumu, bet otrajā fāzē pēc atmiņas vai feromonu taku likvidēšanas piedāvāta izvēle starp to pašu 0,5 M, kā arī 1 M saharozes šķīdumu. Iegūtie rezultāti skaidri parāda, ka, par sākotnējo orientieri izmantojot vienīgi maršruta atmiņu, skudru kolonija nespēj pāriet uz augstākās molaritātes baro…
La letteratura nigeriana in lingua inglese
2020
La tradizione letteraria nigeriana, appropriatasi della lingua del colonizzatore, travalica i confini nazionali, nonché quelli dei cosiddetti studi postcoloniali, percorrendo temi che vanno dalla cosmogonia mitologica all’impatto coloniale, dall’indipendenza alle migrazioni contemporanee. Nonostante sia ampiamente tradotta, in Italia questa produzione letteraria, che pure si è affermata come una delle più ricche del mondo delle lettere in lingua inglese, non è mai stata sistematizzata all’interno di uno studio specifico che ne sottolinei l’aspetto nazionale insieme a quello transnazionale. Questo volume si propone di colmare questo vuoto, contestualizzandola storicamente e culturalmente, sp…
Beam Dynamics Simulations for the New Superconducting CW Heavy Ion LINAC at GSI
2018
LINAC18 : 29th Linear Accelerator Conference : September 16-21, 2018, Friendship Hotel, Beijing, China / Pei, Guoxi , Geneva : JACoW Publishing, CERN, Jan 2019,; Geneva : JACoW Publishing, Geneva, Switzerland 525--527 (2018). doi:10.18429/JACOW-LINAC2018-TUPO084
Potassium-inhibited processing of IL-1 beta in human monocytes.
1995
Agents that deplete cells of K+ without grossly disrupting the plasma membrane were found to stimulate the cleavage of pro-interleukin (IL)-1 beta to mature IL-1 beta. Agents examined in this study included staphylococcal alpha-toxin and gramicidin, both of which selectively permeabilize plasma membranes for monovalent ions, the ionophores nigericin and valinomycin, and the Na+/K+ ATPase inhibitor ouabain. K+ depletion by brief hypotonic shock also triggered processing of pro-IL-1 beta. The central role of K+ depletion for inducing IL-1 beta maturation was demonstrated in cells permeabilized with alpha-toxin: processing of pro-IL-1 beta was totally blocked when cells were suspended in mediu…
ITS-2 rDNA sequencing of Gnathostoma species (Nematoda) and elucidation of the species causing human gnathostomiasis in the Americas.
2000
From several gnathostome species the complete internal transcribed spacer ITS-2 ribosomal DNA (rDNA) repeat sequence and a fragment of the 5.8S rDNA were obtained by direct polymerase chain reaction cycle-sequencing and silver-staining methods. The size of the complete ITS-1 sequence in agarose gel electrophoresis was also obtained. The ITS-2 enabled the differentiation of Gnathostoma spinigerum from Thailand and Gnathostoma binucleatum from Mexico and Ecuador and confirmed the validity of the latter. Gnathostoma turgidum, Gnathostoma sp. I (=Gnathostoma procyonis sensu Almeyda-Artigas et al., 1994), and Gnathostoma sp. II (=G. turgidum sensu Foster, 1939 pro parte), all from Mexico, proved…
International Physical Activity and Built Environment Study of Adolescents : IPEN Adolescent design, protocol and measures
2021
IntroductionOnly international studies can provide the full variability of built environments and accurately estimate effect sizes of relations between contrasting environments and health-related outcomes. The aims of the International Physical Activity and Environment Study of Adolescents (IPEN Adolescent) are to estimate the strength, shape and generalisability of associations of the community environment (geographic information systems (GIS)-based and self-reported) with physical activity and sedentary behaviour (accelerometer-measured and self-reported) and weight status (normal/overweight/obese).Methods and analysisThe IPEN Adolescent observational, cross-sectional, multicountry study …
Analysis of the membrane potential of rat- and mouse-liver mitochondria by flow cytometry and possible applications.
1990
Washed and purified rat- or mouse-liver mitochondria exhibiting high membrane integrity and metabolic activity were studied by flow cytometry. The electrophoretic accumulation/redistribution of cationic lipophilic probes, rhodamine 123, safranine O and a cyanine derivative, 3,3'-dihexyloxadicarbocyanine iodide, during the energization process was studied and was consistent with the generation of a negative internal membrane potential. An exception to this was nonylacridine orange which spontaneously bound to the mitochondrial membrane by hydrophobic interactions via its hydrocarbon chain. Energized purified mitochondria stained with potentiometric dyes exhibited both higher fluorescence and…
Ethnobotanical survey and cytotoxicity testing of plants of South-western Nigeria used to treat cancer, with isolation of cytotoxic constituents from…
2010
Abstract Ethnopharmacological relevance There is only scant literature on the anticancer components of medicinal plants from Nigeria, yet traditional healers in the area under study claim to have been managing the disease in their patients with some success using the species studied. Aim of study To document plants commonly used to treat cancer in South-western Nigeria and to test the scientific basis of the claims using in vitro cytotoxicity tests. Methods Structured questionnaires were used to explore the ethnobotanical practices amongst the traditional healers. Methanol extracts of the most common species cited were screened for cytotoxicity using the sulforhodamine B (SRB) assay in both…