Cone moisture and relative humidity effects on seed release from lodgepole pine cones from Alberta

1982 ◽  
Vol 12 (1) ◽  
pp. 102-105 ◽  
Author(s):  
A. K. Hellum
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Lodgepole Pine ◽  
Moisture Loss ◽  
Humidity Effects ◽  
Seed Extraction ◽  
Pine Cones

Cones from two stands of lodgepole pine (Pinuscontorta Dougl. var. latifolia Engelm.) from southwestern Alberta were bulked for approximately 10 trees per location. The effects of cone moisture content and relative humidities (RH) on seed release within the extraction kiln were noted.Cone moisture content was the most important factor for seed extraction and the greater the moisture loss the more seed was released. Kiln RH of 10, 15, and 20% were equally effective, as was dropping the RH from 20 to 10% during extraction. A final RH of < 10% probably is required for full seed release.

scholarly journals MOISTURE CHANGES IN LODGEPOLE PINE BEFORE AND AFTER ATTACK BY THE MOUNTAIN PINE BEETLE

1961 ◽  
Vol 37 (4) ◽  
pp. 368-375 ◽  
Author(s):  
R. W. Reid
Keyword(s):  
Moisture Content ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dry Weight ◽  
Moisture Loss ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Before And After ◽  
Blue Stain ◽  
One Year

The moisture content of the outer sapwood of non-infested lodgepole pine is normally about 85 to 165 per cent of oven dry weight. In trees that have been infested by the mountain pine beetle for one year, the sapwood moisture content can be as low as 16 per cent. There is a steep moisture gradient from about 160 per cent in the outer sapwood to about 30 per cent in the heart-wood. The moisture content in the centre is slightly higher than in the adjacent wood. In infested trees the sapwood moisture is greatly reduced within a year after the attack but moisture in the heartwood is not altered appreciably. Trees infested early in the season drop to a lower moisture content by fall than trees infested later in the season. In non-infested trees there is a diurnal and a seasonal moisture march; these do not occur in infested trees. The rapid moisture loss in the sapwood of infested trees is associated with blue-stain infection and successful establishment of bark-beetle broods

CATFISH DRYING (Clarias Batraclus) USING ‘TEKO BERSAYAP’ SOLAR DRYER

2012 ◽  
Vol 2 (1) ◽  
pp. 14-20
Author(s):  
Yuwana Yuwana
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Ambient Temperature ◽  
Drying Rate ◽  
Drying Process ◽  
Drying Time ◽  
Ambient Relative Humidity ◽  
Solar Dryer

Experiment on catfish drying employing ‘Teko Bersayap’ solar dryer was conducted. The result of the experiment indicated that the dryer was able to increase ambient temperature up to 44% and decrease ambient relative humidity up to 103%. Fish drying process followed equations : KAu = 74,94 e-0,03t for unsplitted fish and KAb = 79,25 e-0,09t for splitted fish, where KAu = moisture content of unsplitted fish (%), KAb = moisture content of splitted fish (%), t = drying time. Drying of unsplitted fish finished in 43.995 hours while drying of split fish completed in 15.29 hours. Splitting the fish increased 2,877 times drying rate.

scholarly journals Relative Humidity Effects on Tolerance of the Kuruma Prawn Exposed to 14°C Air

1997 ◽  
Vol 63 (2) ◽  
pp. 194-198
Author(s):  
Maher Samet ◽  
Kaworu Nakamura
Keyword(s):  
Relative Humidity ◽  
Humidity Effects

STUDIES OF THE CULTURE OF ATROPELLIS PINIPHILA

1961 ◽  
Vol 39 (6) ◽  
pp. 1521-1529 ◽  
Author(s):  
J. C. Hopkins
Keyword(s):  
Relative Humidity ◽  
Lodgepole Pine ◽  
Carbon And Nitrogen ◽  
Optimum Ph ◽  
Ammonium Succinate ◽  
Cardinal Temperatures

Isolates of Atropellis piniphila were grown from single ascospores, and from cankers on lodgepole pine. A variety of media were tested for their capacity to support growth of the isolates. Descriptions of cultural and microscopical characters were prepared. Endoconidia were produced abundantly by most of the isolates after growth at 50%, or higher, relative humidity, but they were absent from most of the cultures which had been grown at 10% relative humidity. Attempts to grow apothecia in culture were unsuccessful. The cardinal temperatures for growth occurred at 4°, 18°, and at 24 °C. The optimum pH for growth in buffered media occurred at between 3.0 and 4.0. In media containing varying concentrations of carbon and nitrogen, growth was maximal on those containing 4% dextrose and 0.4% ammonium succinate. Of seven vitamins tested, a deficiency for thiamine alone was demonstrated.

Computational modeling of temperature and relative humidity effects on concrete expansion due to alkali-silica reaction

2021 ◽  
pp. 104237
Author(s):  
Lifu Yang ◽  
Madura Pathirage ◽  
Huaizhi Su ◽  
Mohammed Alnaggar ◽  
Giovanni Di Luzio ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Computational Modeling ◽  
Alkali Silica Reaction ◽  
Humidity Effects

Algorithms to predict moisture content of grain using relative humidity time-series

2020 ◽  
Author(s):  
Charles B. Delahunt ◽  
Wenbo Wang ◽  
Simon Ghionea ◽  
Andrew Miller ◽  
Austin Chan ◽  
...  
Keyword(s):  
Time Series ◽  
Relative Humidity ◽  
Moisture Content
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