Ignition and burning mechanisms of live spruce needles

Fuel ◽  
2021 ◽  
Vol 304 ◽  
pp. 121371
Author(s):  
Adnan Darwish Ahmad ◽  
Ahmad M. Abubaker ◽  
Ahmad Salaimeh ◽  
Nelson K. Akafuah ◽  
Mark Finney ◽  
...  
Keyword(s):  
Spruce Needles

137Cs and 90Sr contamination of spruce needles in the northern region of Austria

1999 ◽  
Vol 46 (2) ◽  
pp. 179-185 ◽  
Author(s):  
Karl Irlweck ◽  
Harald Lenz ◽  
Alfred Fürst
Keyword(s):  
Northern Region ◽  
Spruce Needles

Short-term pigment changes in Norway spruce needles

1981 ◽  
Vol 51 (2) ◽  
pp. 175-180 ◽  
Author(s):  
C. D. B. Hawkins ◽  
G. R. Lister ◽  
R. P. Fink ◽  
W. E. Vidaver
Keyword(s):  
Norway Spruce ◽  
Short Term ◽  
Spruce Needles

Comparison of Terpene Composition in Engelmann Spruce (Picea engelmannii) Using Hydrodistillation, SPME and PLE

2004 ◽  
Vol 59 (9-10) ◽  
pp. 641-648 ◽  
Author(s):  
Marek Mardarowicz ◽  
Dorota Wianowska ◽  
Andrzej L. Dawidowicz ◽  
Ryszard Sawicki
Keyword(s):  
Essential Oils ◽  
Steam Distillation ◽  
Solid Phase ◽  
Picea Engelmannii ◽  
Enzymatic Reactions ◽  
Plant Materials ◽  
Engelmann Spruce ◽  
Pressurised Liquid Extraction ◽  
Conifer Trees ◽  
Spruce Needles

Abstract Terpenes emitted by conifer trees are generally determined by analysing plant extracts or essential oils, prepared from foliage and cones using steam distillation. The application of these procedures limits experiments to cut plant materials. Recently headspace techniques have been adopted to examine terpene emission by living plants. This paper deals with the application of solid-phase micro-extraction (SPME) for the analysis of terpenes emitted by conifers foliage of Engelmann spruce (Picea engelmannii), including its seedlings. The compositions of SPME extracts obtained for destroyed and non-destroyed old and juvenile spruce needles were compared with the compositions of essential oils and pressurised liquid extraction (PLE) extracts corresponding to the same plant materials. No substantial differences have been found in the qualitative terpene composition estimated by analysing essential oil and PLE and SPME extracts from non-destroyed old and juvenile foliage. The disintegration of spruce needles results in the formation of a significant amount of myrcene in the case of the old conifer foliage and non-terpenoic compounds in the case of juvenile conifer foliage. This phenomenon can be attributed to enzymatic reactions occurring in the destroyed plant cells.

scholarly journals Amounts of carbon mineralised and leached as DOC during decomposition of Norway spruce needles and fine roots

2010 ◽  
Vol 42 (2) ◽  
pp. 178-185 ◽  
Author(s):  
Karna Hansson ◽  
Dan Berggren Kleja ◽  
Karsten Kalbitz ◽  
Hanna Larsson
Keyword(s):  
Norway Spruce ◽  
Fine Roots ◽  
Spruce Needles

Extraction of Trace Elements from Spruce Needles

2003 ◽  
Vol 34 (5-6) ◽  
pp. 629-643 ◽  
Author(s):  
Anna Leśniewicz ◽  
Wiesław Żyrnicki
Keyword(s):  
Trace Elements ◽  
Spruce Needles ◽  
Extraction Of Trace Elements
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