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Αποτελέσματα 41-50 από 130
Air flow, temperature and humidity patterns in a greenhouse tunnel
(1999)
Air distribution and climatic heterogeneity in greenhouses interfere with plants activity and influence largely crop activity and more particularly transpiration and photosynthesis. This is particularly true for the tunnel, ...
Solar radiation distribution in a tunnel greenhouse
(2008)
A commercial computational fluid dynamics code was used in order to investigate numerically the effect of solar radiation in an arc type tunnel greenhouse equipped with continuous side vents with a tomato crop. For the ...
Pepper crop production under shading and insect proof screenhouses
(2014)
Aim of this study was to experimentally investigate the effect of three different shading and insect proof nets on pepper crop development and production. Three screenhouses were used; two of them were covered by a 50 mesh ...
Convective and ventilation transfers in greenhouses, part 2: Determination of the distributed greenhouse climate
(2002)
In this paper, the characterisation and modelling of the most relevant convective transfers contributing to the description of the distributed greenhouse climate are studied in detail. After a brief review of the equations ...
Air flow and associated sensible heat exchanges in a naturally ventilated greenhouse
(1997)
In order to investigate the three-dimensional nature of the air flow within the greenhouse, a three-dimensional sonic anemometer was used for the direct measurement of air and heat exchange inside the greenhouse and through ...
Effect of a red to far red light filtering plastic film on growth of gardenia (Gardenia jasminoides)
(2006)
The aim of this study was to determine the influence of a light filtering plastic film (red to far red ratio modification) on gardenia (Gardenia jasminoides) growth and to investigate the possibility to use this film as a ...
CLOSYS: Closed system for water and nutrient management in horticulture
(2006)
The EU project CLOSYS aimed at developing a CLOsed SYStem for water and nutrients in horticulture. The main objective was to control water and nutrients accurately such that pollution is minimized and crop quality enhanced. ...
Alteration of NO - 3, PO 3- 4 and SO 2- 4 Concentration on rose plants in response to greenhouse climate parameters and their concentration in the nutrient solution
(2011)
The objective of this work was to quantify temporal changes of NO - 3, PO 3- 4 and SO 2- 4 concentration on leaves, shoots and roots of rose plants during a short growing period, in response to air temperature, light ...
Low levels of p27 in association with deregulated p53-pRb protein status enhance tumor proliferation and chromosomal instability in non-small cell lung carcinomas
(2001)
Background: Down-regulation or overexpression of the cyclin-dependent kinase inhibitor p27 have been observed in a range of malignancies, including lung cancer. To further elucidate the role of the molecule in tumor growth ...
Transpiration and energy balance of a greenhouse rose crop in mediterranean summer conditions
(2001)
The transpiration rate of a soilless rose crop and its interactions with the greenhouse microclimate and energy balance were investigated during summer conditions in Greece. At this aim, measurements of transpiration (γE ...