Resultados de búsqueda - "biology"

Occupancy winners in tropical protected forests: a pantropical analysis por Semper-Pascual, A., Bischof, R., Milleret, C., Beaudrot, L., Vallejo-Vargas, A.F., Ahumada, Jorge A., Akampurira, E., Bitariho, R., Espinosa, S., Jansen, P.A., Kiebou-Opepa, C., Moreira Lima, M.G., Martin, E.H., Mugerwa, B., Rovero, F., Salvador, J., Santos, F., Uzabaho, E., Sheil, D.

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An entomopathogenic fungus and a natural extract benefit rice (Oryza sativa) by suppressing populations of insect pests while keeping high populations of their natural enemies por Chou, Cheythyrith, Hadi, Buyung A.R., Chiba, Sotaro, Sato, Ikuo, Il-Ryong Choi, Tanaka, Toshiharu

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Labour productivity: The forgotten yield gap por Cock, James H., Prager, Steven D., Meinke, Holger, Echeverria, Ruben

“…Despite this situation, agricultural development agencies tend to emphasise biological yield per unit area to satisfy the increasing demand for more nutritious and varied food products. …”
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Target 10 – Productive Sectors por DeClerck, Fabrice A.J., Navarrete Frías, Carolina, Jones, Sarah K., Estrada-Carmona, Natalia, Barrios, Edmundo, Milano, Fernando, Obura, David, Leadley, Paul

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Managing fall armyworm (Spodoptera frugiperda J.E. Smith) using leaf residue of neem (Azadirachta indica A. Juss) on maize (Zea mays L.) under natural infestation por Ewansiha, S.U., Enogieru, L.H., Aigbe, U.D., Kamara, A.

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Transcriptional alterations of the resistant potato genotype 'Cruza 148' in response to Ralstonia solanacearum infection por Okiro, L.A., Mulwa, R.M., Oyoo, M.E., Mendes, T.

“…The analysis of enriched GO terms revealed 225 terms, with 132 related to biological processes, 16 linked to cellular components and 12 linked to molecular functions. …”
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Influence of available nitrogen and rice genotype on associative dinitrogen fixation por Malarvizhi, P., Ladha, J.K.

“…Rice (Oryza sativa L.) genotypes with a high ability to support biological N2 fixation are of interest because they would enhance N gains in the rice‐soil system without changing existing cultural practices. …”
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Legumes As Nitrate Catch Crops During the Dry-To-Wet Transition in Lowland Rice Cropping Systems por George, Thomas, Ladha, J.K., Garrity, Dennis P., Buresh, Roland J.

“…Wilczek], weedy, and weed‐free treatments were subplots in the February‐to‐May dry‐season mainplots of weedy, weed‐free, and frequently tilled fallows. Legume biological N2 fixation (BNF) was measured by 15N dilution. …”
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Alley cropping: trees as sources of green-manure and mulch in the tropics por Wilson, G.F., Kang, B.T., Mulongoy, K.

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Analysis of plot diagnostics as a decision-support tool in CIMMYT Innovation Hubs por Fonteyne, Simon

“…Farm advisors frequently recommend practices aligned with conservation agriculture, crop diversification and rotations (often with legumes), improved planting arrangements and densities, seed quality and seed treatment, and the use of biological inputs to enhance soil function and system resilience. …”
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Pest outbreaks in tropical forest plantations: is there a greater risk for exotic tree species? por Nair, K.S.S.

“…It is concluded that the following factors determine the risk of pest outbreak in exotic monoculture plantations: (1) presence or absence of plant species closely related to the exotic; (2) extent of area under the exotic species; (3) genetic base of the planted stock; (4) distance from the native habitat of the exotic; (5) existence of serious pests in the native habitat of the exotic; (6) time elapsed since introduction; (7) chemical profile of the exotic species; and (8) innate biological attributes of the insects associated with a tree species. …”
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Effects on production of milking crossbred suckler cows grazing a semi-arid area of Kenya. III. Post-weaning growth of crossbred calves por Anindo, D.O., Topps, J.H.

“…Feeding of concentrates to the cows and calves had little effect on this performance, which was not worthwhile in terms of economy of use and biological efficiency.…”
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In vitro cultivation of Trypanosoma congolense bloodstream forms in the absence of feeder cell layers por Hirumi, H., Hirumi, K.

“…The modification was done by supplementing the medium with 0·05 mM bathocuproine sulphonate, 1·5 mM L-cysteine, 0·5 mM hypoxanthine, 0·12 mM 2-mercaptoethanol, 1 mM sodium pyruvate, 0·16 mM thymidine, 20% (v/v) heat-inactivated young goat serum and 5% (v/v) Serum Plus™ (Hazleton Biologics, Lenaxa, KS, USA). Trypanosomes obtained from two different sources were used to initiate primary cultures: (1) metacyclic forms which were producedin vitroat 27 °C, and (2) bloodstream forms obtained from Balb/c mice which had been infected with the bloodstream forms transformedin vitrofrom the metacyclic forms. …”
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Financial analysis of dipping strategies for indigenous cattle under ranch conditions in Uganda por Okello-Onen, Joseph, Mukhebi, A.W., Tukahirwa, E.M., Musisi, G., Bode, E., Heinonen, R., Perry, Brian D., Opuda-Asibo, J.

“…Data were collected by monitoring cattle performance over a period of 34 months. Biological data collected included the number of cows at the beginning and end of the study, net starting liveweight, number of calves born, number of animals dying due to tick-borne diseases and other causes, number of animals sold or slaughtered and milk yield. …”
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Cattle manure quality in Maragua District, central Kenya: Effect of management practices and development of simple methods of assessment por Lekasi, J.K., Tanner, J.C., Kimani, S.K., Harris, P.J.C.

“…Data on manure texture, colour, smell and biological activity were collected in an attempt to relate manure nutrient concentration and C:N ratio to easily discernible characteristics of manure-composts on-farm. …”
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Polymorphism in the microsatellite located in the promoters of the Tnfa and Tnfb genes of different mouse strains por Iraqi, F.A., Teale, A.J.

“…Tnfa and soluble lymphotoxin alpha are cytokines with similar biological activities. Tnfa, a pleiotropic cytokine that is predominatly produced by activated macrophages (Beutler et al 1985) exerts diverse effects on a wide variety of cells including tumor cells lymphocytes fibroblasts and endothelial cells (Beutler and Cerami 1989). …”
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Purine-specific nucleoside N-ribohydrolase from Trypanosoma brucei brucei: Purification, specificity, and kinetic mechanism por Parkin, D.W.

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Cassava starch processing at small scale in North Vietnam por Da, Guillaume, Dufour, D.L., Marouzé, Claude, Thanh, ML, Maréchal, Pierre-André

“…This may lead to a higher chemical oxygen demand (COD) and biological oxygen demand (BOD) in waste-water, which can result in more polluted waste-water than compared with the type A and B technologies. …”
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Origin and management of neotropical cassava arthropod pests por Bellotti, Anthony C., Braun, Ann R., Arias, B., Castillo Franco, J.A., Guerrero, J.M.

“…Control strategies are based on host plant resistance, biological control and cultural practices. Adequate levels of resistance have been identified for mite and whiteflies and moderate levels for mealybugs. …”
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Characterisation of production, marketing and consumption patterns of farmed tilapia in the Nile Delta of Egypt por Eltholth, Mahmoud, Fornace, K., Grace, Delia, Rushton, Jonathan, Häsler, Barbara

“…The main water supply for almost all farms was agricultural drain water, a potential source of contamination with chemical and biological hazards. The main production constraints were reported to be feed prices, water quality and availability, land rent, fuel and energy sources and environmental conditions. …”
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