Resultados de búsqueda - "phenomenon"

Informal cross-border trade in Africa por Bouët, Antoine, Cissé, Brahima, Traoré, Fousseini

“…We present two interesting initiatives that are intended to assess the phenomenon of ICBT in African regions: (1) an initiative coordinated by the Permanent Interstate Committee for Drought Control in the Sahel (Comité permanent Inter-État de Lutte contre la Sécheresse au Sahel, abbreviated as CILSS) and implemented by the West African Association for Cross-Border Trade in Agro-forestry-pastoral and Fisheries Products - (AOCTAH, Association Ouest Africaine du Commerce Transfrontalier des produits Alimentaires, Agro-sylvo-pastoraux et Halieutiques) that measures informal/unrecorded trade in agricultural commodities in West Africa; and (2) an initiative designed by the Uganda Bureau of Statistics (UBoS) and Bank of Uganda (BoU) which assesses informal/unrecorded trade in agricultural and industrial commodities at Uganda’s borders with its neighboring countries.…”
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Projected shifts in coffee production and sustainability due to climate changes por Rahn, Eric, Bunn, Christian, Craparo, Alessandro

“…We show that the literature for the most part frames climate change as a geospatial phenomenon. Global and regional projections robustly show an overall reduction in potential area climatically suitable for coffee, with shifts towards higher elevations and relative winners and losers. …”
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Informal cross-border trade in Africa: How much? Why? And what impact? por Bouët, Antoine, Pace, Kathryn, Glauber, Joseph W.

“…Informal cross-border trade (ICBT) represents a prominent phenomenon in Africa. Several studies suggest that for certain products and countries, the value of informal trade may meet or even exceed the value of formal trade. …”
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Peer effects, risk pooling, and status seeking: What explains gift spending escalation in rural China? por Chen, Xi, Kanbur, Ravi, Zhang, Xiaobo

“…We test three competing explanations of this phenomenon—peer effect, status concern, and risk pooling—based on a census-type primary household survey in three natural villages in rural China and on detailed household records of gifts received on major occasions. …”
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中国教育和医疗卫生中的不平等问题 por Zhang, Xiaobo

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A mystery in sequencing the mitochondrial DNA D-loop from blood samples of domestic Mallard duck por Wu, Zhen-Yang, Zeng, Sheng-Cheng, Luo, Yu-Zhu, Han Jianlin

“…The results supported the presence of Numts in blood samples of domestic Mallard duck. This phenomenon has not been recognized or reported before and it can certainly confound the application of D-loop sequence as a molecular marker to genetic study of domestic Mallard duck. …”
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Extensive gene tree discordance and hemiplasy shaped the genomes of North American columnar cacti por Copetti, Dario, Búrquez, Alberto, Bustamante, Enriquena, Charboneau, Joseph L. M., Childs, Kevin L., Eguiarte, Luis E., Lee, Seunghee, Liu, Tiffany L., McMahon, Michelle M., Whiteman, Noah K., Wing, Rod A., Wojciechowski, Martin F., Sanderson, Michael J.

“…We found that 60% of the amino acid sites in proteins exhibiting homoplasy do so because of conflicts between gene genealogies and species histories. This phenomenon, termed hemiplasy, is likely a consequence of the unusually long generation time of these cacti.…”
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DNA transposon activity is associated with increased mutation rates in genes of rice and other grasses por Wicker, Thomas, Yu, Yeisoo, Haberer, Georg, Mayer, Klaus F. X., Marri, Pradeep Reddy, Rounsley, Steve, Chen, Mingsheng, Zuccolo, Andrea, Panaud, Olivier, Wing, Rod A., Roffler, Stefan

“…Most importantly, we find this phenomenon also in maize, wheat and barley. Thus, these findings suggest that DNA transposon activity is a major evolutionary force in grasses which provide the basis of most food consumed by humankind.…”
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Conservation agriculture in Morocco: review and analysis for the resilience of the cereal system on 1 million hectares by 2030 por Moussadek, Rachid, Laghrour, Malika, Kadiri, Kenza, Mrabet, Rachid

“…Morocco, like other North African countries, is located in an area qualified as a hotspot in terms of climate change. This phenomenon is associated with degradation of agricultural land due to intrinsic soil conditions and intensive plowing coupled with poor agricultural practices increasingly reducing the fertility of these soils and their productivity. …”
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Soil and crop contamination through wastewater irrigation and options for risk reduction in developing countries por Abaidoo, Robert C., Keraita, Bernard N., Drechsel, Pay, Dissanayake, Priyanka, Maxwell, Akple S.

“…Wastewater irrigation is becoming a global phenomenon, as a result of global water scarcity and increased pollution of water sources. …”
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Analysis of flow and baseflow trends in the Usangu Catchment, Tanzania por Shu, Yunqiao, Villholth, Karen G.

“…Baseflow decline over the 50-year period (1960-2009) was a generally observed phenomenon across the catchment in all the streams investigated. …”
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Colony dimorphism in Bradyrhizobium strains por Sylvester-Bradley, Rosemary, Thornton, Philip K., Jones, Peter G.

“…The formation of two persistent colony types by one strain (clonal or colony dimorphism) may be a common phenomenon among Bradyrhizobium strains.…”
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Impact of land management on soil macrofauna in the Oriental Llanos of Colombia por Decaëns, Thibaud, Lavelle, Patrick M., Jiménez Jaén, J.J., Escobar, G., Rippstein, G

“…Annual high input cultivations results in a spectacular decrease, both quantitative and qualitative, in the invertebrate populations (3.2 to 4.3 g.m(-2), 429 to 592 ind. m(-2) and 18 units). This phenomenon may be explained by the effect of the tilling of the soil, the fertilization and by the decrease of the soil organic matter.…”
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Spatial dissociation between two endogeic earthworms in the Colombian "Llanos" por Jiménez Jaén, J.J., Rossi, J.P.

“…The presence of opposite patches and gaps suggests the presence of a competitive exclusion phenomenon (at least spatial) that deserves further investigations.…”
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The participation of women and children in Latin American and Caribbean agriculture por Herpen, D. van

“…The implications this phenomenon would have for the design and transfer of agricultural technology are analyzed. …”
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Investigating El Niño-Southern Oscillation and society relationships por Zebiak, Stephen E., Orlove B, Vaughan, Catherine, Muñoz, A.G., Hansen, James, Troy T, Thomson, M., Lustig, A., Garvin S

“…Over time, increased attention on ENSO has led to a better understanding of both the physical mechanisms, and the environmental and societal consequences of the phenomenon. The prospects for seasonal climate forecasting emerged from ENSO studies, and were first pursued in ENSO studies. …”
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Population dynamics of Bemisia tabaci (Homoptera: Aleyrodidae) parasitoids on cassava mosaic disease resistant and susceptible varieties por Otim, M., Legg, D.J., Kyamanywa, S., Polaszek, A., Gerling, D.

“…The significance of this phenomenon on the potential use of these aphelinid parasitoids as biocontrol agents of the cassava whitefly is discussed.…”
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The Nile Delta’s water and salt balances and implications for management por Molle, Francois, Gaafar, I., El-Agha, Doaa E., Rap, Edwin

“…Various reasons for such a phenomenon and the scope for saving water are explored and discussed. …”
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Domestic demand for food in Costa Rica: a double-hurdle analysis por Geurts, J.A.M.M., Jansen, H.G.P., Tilburg, A. van

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[La reversión de un tipo de reacción fotoestable en fotolabiles en árboles de café causado por deficiencia de nitrógeno] por Muller, L.

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