Trees yield

The bark of Cinriar/ie/nK/n ofiieri. the so-called nrishane " White SastiatT-as tree, yields ftoin 1 pr-r amt. to j-4 i>ei- cent, of essential oil. T his has been esamined by IfatgreAves. ... 

This tree yields f-Qlfi iicr eent, ol essential oil which has the fol-... 

According to Drooka, the le ives of the tree Citrua dccumniui growing in the Philippines, which ia probably a variety of the European tree, yields 1 7 per cent, of an oil having the following oharactere —... 

The second type is characteristic of trees yielding oils which contain pinene, but are more or less rich in cineol and free from phellandrene. 

The wood of Cryptomeria japonica, a Japanese cedar tree, yields an oil which contains a sesquiterpene to which the name suginene has been assigned. It has the following characters —... 

A genus of trees yielding a good type of natural rubber, of little commercial importance nowadays. The Ficus elastica is the well-known ornamental rubber plant. 

The bark of a large yew tree yields only enough TAXOL for a single treatment. However, cancer patients require repeated treatments over a long period of time. Working in a laboratory, chemists found the first solution to this problem. They developed several different methods to make, or synthesize, TAXOL , from simple, widely available chemicals. Unfortunately, these methods are expensive and time-consuming. 

Table 4.10. Individual tree yields as a function of area per tree and crop yield. ...

Tree spacing Expected crop yield Individual tree yield Fruit size ... 

The amount of land required depends on the tree yield, power plant efficiency, and the capacity factor. The average biomass yield was assumed to be 11.3 dry ton/hectare. The power plant efficiency is based on a dry higher heating value of 20,200 kj/kg. A power plant annual capacity factor of 86.3% was assumed. Power plant sizes of 25, 50, and 150 MW were considered. 

Within a day of collection, experimental animals were transported to the Barley Canyon site and placed on sample trees Ten larvae were placed in a nylon screen bag enclosing one branch which contained at least 10 new foliage buds Any resident larvae present on the branches were removed prior to bagging Five bags, each with 10 larvae, were placed on each tree yielding a total of 50 larvae per tree All bags were placed within the north-facing, midcrown quarter of each tree ... 

The bark of this West Indian tree yielded lupeol and d-sesamine in addition to five quaternary alkaloids, namely, chelerythrine, 1-canadine methochloride, candicine, and d-tambetarine, all isolated as chlorides as well as alkaloid-A (mp 266°-268°), which is not to be confused with alkaloid-A from Stephania rotunda (209). The plant has also been referred to as Z.follis oblongo-ovatis Browne, Z. clavaherculis SW., Z. caribaeum Hitchc., Fagara martinicense Lam. 

The bark of this evergreen tree yielded the tertiary alangine, C19H26O2N (m.p. 205-208°, oi 4-9° picrate, m.p. 84° methiodide, 201°). The alkaloid has one methoxyl, probably an aliphatic hydroxyl, but no N-methyl group (8). 

The bark of this tree yielded an alkaloid, C16H17O2N (m.p. 140° picrate, m.p. 169° methiodide, m.p. 221-222°), which crystallized in colorless monoclinic crystals from ethanol. It has two methoxyls (127). 

The bark of this tree yielded three new alkaloids (130) A, C14H8ON2 (m.p. 162-163°) B, CuHioOsNs (m.p. 241-242°) and C, C15H10OSN2 (m.p. 252-253°). Numbers A and C are also present in the wood while A and B are present in the leaves which also contain a very small amount of a fourth alkaloid. 

Cambou B., Jafari k., Elamrani K., 1989 An elastoplastic model for granular material using tree yielding mechanisms. Num. Models in geomech. Numog III. Ed Pretruszizak, Pande-Elsevier, pp. 1-8. 

Gum arabic is the result of some process of infection of the tree. There is some question as to whether the infection is bacterial or fungoidal. Acacia trees yield the gum only when in an unhealthy condition. Extremely poor soil with only a trace of salt in it may be the cause in some instances, as evidenced by the good yields where the soil is worn out and unable to produce further crops. Lack of moisture in the soil and lack of general atmospheric humidity and other conditions which lessen the vitality of the tree improve the yields. An area defoliated... 

The substitution model should be optimized to fit the observed data. Lor example, if there is a transition bias, evident by an inordinate number of sites that include only purines or pyrimidines, the likelihood of the data under a model that assumes no bias will never be as good as one that does. Likewise, if a substantial proportion of the sites are occupied by a single base and another substantial proportion have equal base frequencies, the likelihood of the data under a model that assumes that all sites evolve equally will be less than that of a model that allows rate heterogeneity. Modifying the substitution parameters, however, modifies the likelihood of the data associated with particular trees. Thus, the tree yielding the highest likelihood under one substitution model might yield much lower likelihood under another. 

One of the first pattern recognition applications in mass spectrometry was the attempt to determine the molecular formula by a decision tree C120, 128, 1293. The decision tree contained several binary classifiers. Each of the classifiers decided whether a compound contains more atoms than a given number- A run through the decision tree yields the molecular formula of an unknown whose low resolution mass spectrum is known. A tree with 26 classifiers was necessary for a set of 346 compounds of formulas --i 6 0-3 0-2 spectra with an artifi-... 

Over 2000 plants produce polyprenes, mostly in a mixture with terpenes and waxes. Today, almost all natural rubber is taken from trees of the Hevea brasiliensis species. One hectare of trees yields 500-2000 kg of latex per year. The trees are broached with angular cutters and the latex is... 

Natural rubber-based adhesives constitute many nsefnl types of adhesives. They have been made from the latex that is collected from the sap of rubber trees grown in Malaysia and other countries of Sonth East Asia. Rnbber of this type was first collected from the Hevea brasiliensis tree - seeds from the tree were first taken from the Amazon forests in Brazil, propagated in Kew in London, and then supplied, over a century ago, to Malaya and adjacent counuies, where there are now many millions of rubber trees, yielding cis-polyisoprene-based natnral rnbber. This has similar properties to the principal SBR synthetic rubber, derived from styrene and butadiene, both of which are obtained by the cracking process from crnde oil, with subsequent chemical reactions. Natural rubber is obtained from the uee by tapping the bark, when the latex flows out spontaneously as the tree is wounded. This latex is about 33% solids - most natural rubber latex is concentrated to 60% and preserved with ammonia for transport and storage. 

Varnish tree (1758) n. Any of various trees yielding a milky juice from which in some cases varnish or lacquer is prepared. 

Olive Oil.—The olive is extensively grown in Southern Europe and in portions of Asia and Africa bordering the Mediterranean Sea. The fruit of this tree yields the oil. 

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