scholarly journals Desiccation sensitivity of wild Castanea mollissima Blume determined by differential scanning calorimetry

2020 ◽  
Vol 49 (4) ◽  
pp. 975-980
Author(s):  
Biao Han ◽  
Lu Lu ◽  
Su-Juan Guo ◽  
Wen-Qing Li ◽  
Xiao-Man Xie
Keyword(s):  
Thermal Properties ◽  
Moisture Content ◽  
Water Content ◽  
Exothermic Peak ◽  
Onset Temperature ◽  
Unfrozen Water ◽  
Scanning Calorimetry ◽  
Moisture Contents ◽  
Unfrozen Water Content ◽  
Castanea Mollissima

Thermal properties of wild Castanea mollissima seeds embryos with different moisture contents, and the optimal moisture contents for cryopreservation were studied. Seeds of similar size and weight (3.5 ± 0.3g) were put in silica gel at 0 to 7 days, embryo moisture content, viability and thermal properties were measured everyday. The results showed that the onset temperature and the crystallization peak of the mean enthalpy decreased with the decrease of embryo moisture content. Exothermic peak disappeared when the seeds were dried for 4 days, with an embryo moisture content of 0.45 ± 0.15 gH2O/g dw. The unfrozen water content (WCu) was 0.247 gH2O/g dw. The optimal water content was found to be 0.45 ± 0.15 gH2O/g dw, with the survival of 76.2%. Castanea mollissima embryonic axes dehydration needs comprehensive consideration of exothermic peak, unfrozen water content, onset temperature and viability loss.

scholarly journals Effect of soil salinity and organic matter content on thermal properties and unfrozen water content of frozen soils at west coast of Baydara Bay

2016 ◽  
pp. 59-63
Author(s):  
D. M. Aleksyutina ◽  
R. G. Motenko
Keyword(s):  
Organic Matter ◽  
Thermal Properties ◽  
Water Content ◽  
Soil Salinity ◽  
West Coast ◽  
Organic Matter Content ◽  
Matter Content ◽  
Unfrozen Water ◽  
Unfrozen Water Content ◽  
Composition Structure

The paper considers laboratory results of the composition, structure and properties for frozen and thawed soils at west coast of Baydara Bay. Experimental data of unfrozen water content and thermal properties are discussed and summarized for different soils. The roles of soil salinity and organic matter content on these data were estimated for frozen and thawed soils.

scholarly journals Processing of Wild Sunflower with Different Moisture Contents into Solid Bio Fuel

2021 ◽  
pp. 1-9
Author(s):  
Fabie T. Dummapi ◽  
Jacqueline I. Liniasan ◽  
Marvin T. Valentin ◽  
Milagros B. Onalan ◽  
Leonardo D. Dumalhin ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Moisture Content ◽  
Physical Properties ◽  
Ignition Time ◽  
Volume Density ◽  
Ash Content ◽  
Burning Time ◽  
Wild Sunflower ◽  
Average Mass ◽  
Moisture Contents

Wild sunflower with moisture contents of 16%, 12% and 8% was densified without the addition of binding agent. The physical properties of the formed briquettes such as mass, dimensions, volume, density and shattering resistance were evaluated. Thermal properties like ignition time, burning time, ash content, and thermal fuel efficiency by means of boiling test were also evaluated. Wild Sunflower stems were gathered and shredded using locally fabricated biomass shredder available at the Research Office of Benguet State University, and were processed into the desired size and moisture contents. Right after the briquetting operation, the physical properties of the briquette were measured and then stored in a zip bag for 24 hours. After the storage, same measurement was conducted. Results show that the influence of moisture contents on the average mass, dimension, shattering resistance, volume and density was statistically insignificant. The wild sunflower with moisture content of 16% had the highest shattering resistance of 88.85%. Furthermore, the influence of moisture content on the thermal properties like ignition time, burning time and ash content are statistically insignificant. Among the moisture contents, the fastest ignition time of 43.75 sec with longest burning time was recorded under 12%. Ash content was also lowest at 12%.

Prediction of salt influence on unfrozen water content in frozen soils

1979 ◽  
Vol 13 (1-4) ◽  
pp. 137-155 ◽  
Author(s):  
R.N. Yong ◽  
C.H. Cheung ◽  
D.E. Sheeran
Keyword(s):  
Water Content ◽  
Unfrozen Water ◽  
Frozen Soils ◽  
Unfrozen Water Content
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