Measurements of air exchange rates were performed in situ in a glasshouse equipped with a continuous roof opening. These measurements were carried out using the decay rate method with N2O as tracer gas. Simultaneously, ...

Theoretical considerations concerning the greenhouse energy behaviour during the night, allow us to propose an evaluation method of the overall heat transfer coefficient through the greenhouse cover material as a function ...

The physical basis of natural ventilation is reviewed and the ventilation performance examined of six different greenhouse and tunnel types equipped with either roof or side, or both roof and side vents. Altogether, sixteen ...

Direct estimation of airflow at the vent opening by means of differential pressure measurements were performed in a twin-span greenhouse equipped with a continuous vent at the gutter. Application of Bernoulli's equation ...

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, ...

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 ...

A simple statistical relation between the ventilation rate of a greenhouse and its roof and side openings was proposed and tested on experimental data. This relation combines thermal buoyancy and wind effects as driving ...

A climatic analysis is presented for the rational development of crops under cover in Greece. From the climatic requirements of thermophile species commonly grown in greenhouses in Greece, we have characterised the ...

Measurements of transpiration (TR) of a rose crop (cv. First Red) grown on perlite were recorded during the winter of 1998 in a glasshouse located on the coastal area of Eastern Greece. Simultaneously, measurements of solar ...

Twenty cases of infiltrating ductal breast carcinomas were stained with the mouse monoclonal antibody H, an IgM, in order to estimate the distribution of the epitope (a carbohydrate moiety) recognized by this antibody in ...