Results 131 to 140 of about 3,875 (178)

New Insights into Heartwood and Heartwood Formation

2013
The formation of true or obligate heartwood in the innermost living xylem tissues of many tree species is one of the most important ecological and economical secondary differentiation processes. Natural durability, biological, technological, and esthetic parameters of wood and its products depend on the presence, quality, and quantity of heartwood ...
Andreas Kampe, Elisabeth Magel
openaire   +1 more source

Heartwood

2017
The thousand fine points and tops of the trees delight me; they are the plumes and standards and bayonets of a host that marches to victory over the earth. The trees are handsome towards the heavens as well as up their boles; they are good for other things than boards and shingles....
Richard Higgins, Richard Higgins
openaire   +1 more source

Polyphenols of Intsia heartwoods

Phytochemistry, 1973
Abstract Robinetin is the main polyphenol of the heartwood of Intsia bijuga and is accompanied by smaller amounts of 3,5,4′-tri- and 3,5,3′,4′-tetra-hydroxystilbenes, dihydromyricetin, myricetin and naringenin. The wood contains large amounts of water soluble polymers including leucocyanidin. The stilbenes are absent from the sapwood. Samples of I.
William Edwin Hillis, Yoshikazu Yazaki
openaire   +1 more source

Taxus heartwood constituents

Phytochemistry, 1969
Abstract The heartwood of several Taxus species has been investigated. All contain a series of six lignans also occurring in Fitzroya cupressoides. The neutral constituents, however, are different from those of Fitzroya.
H. Erdtman, K. Tsuno
openaire   +1 more source

Antimicrobial activity of the heartwood of Taxus baccata

Fitoterapia, 2001
The ethanolic extract of Taxus baccata heartwood showed significant activity against selected gram-negative bacteria and against five out of nine tested fungi.
Sener, B, Erdemoglu, N
openaire   +3 more sources

Estrogenic constituents of the heartwood of Dalbergia parviflora

Phytochemistry, 2008
From the heartwood of Dalbergia parviflora, five compounds, dalparvin A (1), B (2), C (3), dalparvinol C (4), and neokhriol A (5), along with 11 known compounds, kenusanone G (6), cajanin (7), sophorol (8), alpinetin (9), hesperetin (10), 3'-O-methylorobol, odoratin, (2R)(3R)-2,3-trans 7-hydroxy-5-methoxydihydroflavonol, (6aR, 11aR)-3,8-dihydroxy-9 ...
Kaoru, Umehara, Kiyomitsu, Nemoto, Kyoko, Kimijima, Ayako, Matsushita, Eri, Terada, Orawan, Monthakantirat, Wanchai, De-Eknamkul, Toshio, Miyase, Tsutomu, Warashina, Masakuni, Degawa, Hiroshi, Noguchi   +10 more
openaire   +2 more sources

Heartwood

2021
  +4 more sources

THE SAPWOOD-HEARTWOOD TRANSITION

Australian Forestry, 1952
SUMMARY The transition from sapwood to heartwood in certain species has been described in detail, and the formation of intermediate wood discussed. The distinction between sapwood and heartwood cannot always be clearly made on the basis of colour, or on the presence of starch or tyloses, but must be based on the fundamental change which lies behind ...
openaire   +1 more source

Polyphenols and Colour of Douglas Fir Heartwood

Holzforschung, 1997
Heartwood Colour Dihydroquercetin Leucocyanidin Summary The natural red-orange colour of Douglas fir heartwood limits its utilization for the production of thermo-mechanical pulps. Heartwood colour, determined in the CIEL*a*b* system, is studied in relation to various treatments applied to the wood.
Dellus, V., Scalbert, Augustin, Janin, G.   +2 more
openaire   +2 more sources

CONSTITUENTS OFHOLOPTELEA INTEGRIFOLIAHEARTWOOD

Planta Medica, 1977
The bark yields β-sitosterol, oleanolic acid and hederagenin besides the triterpenoid already reported.
G, Misra, S C, Bhatnagar, S K, Nigam
openaire   +2 more sources