Results 241 to 250 of about 1,531,075 (291)

Dehumidification requirement modelling and control strategy for greenhouses in cold regions

Computers and Electronics in Agriculture, 2021
Abstract Plant transpiration and evaporation from soil surface or growth media in greenhouses produce a large amount of moisture. High relative humidity (RH) favors fungus growth and causes plant diseases thus dehumidification is essential in greenhouses. In this study, a novel model (DehumReq) is developed to predict the dehumidification requirement
Huiqing Guo, Jingjing Han
exaly   +3 more sources

A Simple Model for the Cold Requirement of the Tulip

Annals of Botany, 1974
A R Rees
exaly   +2 more sources

Greenhouse Dehumidification Requirement in Cold Regions

2012 Dallas, Texas, July 29 - August 1, 2012, 2012
Dehumidification is essential for greenhouse humidity control due to the serious effect of high relative humidity on crops. A few dehumidification methods have been tested in a greenhouse. Mechanical refrigeration dehumidification is proved to be the most energy efficient and is the most promising method for greenhouses in cold regions.
null Jingjing Han, null Huiqing Guo, null Robert Brad, null Doug Waterer, null Zhu Gao, null Rick VanDuyvendyke   +5 more
openaire   +1 more source

Substitution of the cold requirement of tulip CV. ‘apeldoorn’ by GA3

Scientia Horticulturae, 1976
Abstract To investigate whether GA3 can substitute for the requirement, 1 mg GA3 was injected in dry stored bulbs before, during or after the following treatments: (a) 12 weeks at 21°C, (b) 12 weeks at 5°C, (c) 6 weeks at 21°C followed by 6 weeks at 5°C, and (d) 6 weeks at 5°C followed by 6 weeks at 21°C. The bulbs were then planted in light at 15°C.
van Bragt, J., van Ast, K.J.
openaire   +1 more source

Cold engine cranking torque requirement analysis

SAE Technical Paper Series, 2007
<div class="htmlview paragraph">This paper presents an analytical approach of estimating the minimum torque to start an engine at low temperature down to -30 °C. Obviously, the output torque from a starter motor has to overcome the conventional mechanical friction torque from piston, bearings, valvetrain and auxiliaries, and gas torque from the ...
Quanbao Zhou, John Houldcroft
openaire   +1 more source

The cold requirement for forcing Muscari and related plants

Scientia Horticulturae, 1987
Abstract The forcing of Leopoldia comosa var. plumosa, Muscari armeniacum cultivar ‘Early Giant’, M. botryoides album, M. tubergenianum and Pseudomuscari azureum was examined after planting and storage of bulbs for up to 20 weeks at 5–13°C. L. comosa plumosa was exceptional in that more bulbs flowered after no storage or only short storage than after
Gordon R. Hanks, Stephen K. Jones
openaire   +1 more source

Dehumidification Requirement Determination for a Greenhouse in Cold Regions

ASABE/CSBE North Central Intersectional Meeting, 2012
High levels of relative humidity (RH) can easily occur inside greenhouses. It can lead to dew or water condensation on plant leaf surfaces; and condensation on the interior surface of covering materials also drips on plants, providing an ideal growing condition for fungal diseases.
null Jingjing Han, null Huiqing Guo, null Robert Brad, null Zhu Gao, null Doug Waterer   +4 more
openaire   +1 more source

Cold Weather Fuel Requirements of Oldsmobile Diesels

SAE Technical Paper Series, 1980
<div class="htmlview paragraph">Two Oldsmobiles with 5.7 L diesel engines and one with a 4.3 L diesel engine were tested to determine the effect of the low temperature properties of diesel fuel on operability (cold-start and warm-up driveability).
Brian Y. Taniguchi, Jack D. Benson
openaire   +1 more source

Hemolysis by complement and cold‐reacting antibodies: Time and temperature requirements

American Journal of Hematology, 1977
AbstractThe time and temperature requirements of certain steps involved in hemolysis of normal human red cells by cold‐reacting antibodies and normal human serum were examined by means of techniques that measure the amount of antibody and the fourth (C4), third (C3), and fifth (C5) component of complement bound to red cell membranes.
W F, Rosse, J, Adams, G, Logue
openaire   +2 more sources

Dehumidification Requirement for aGreenhouse Located in a Cold Region

Applied Engineering in Agriculture, 2015
Abstract. High levels of relative humidity (RH) commonly occur inside greenhouses, which leads to condensation on plant leaf surfaces. In addition, condensation on interior building surfaces occurs, resulting in water dripping on plants, providing an ideal growing condition for fungal diseases, and also contributing to the deterioration of equipment ...
openaire   +1 more source