Helianthus annus

Experimental low-methoxyl pectin was obtained from dry heads (without seeds) of sunflower Helianthus annus L.). The extraction of pectin was carried out according to the method of Lin et al. (1975) with slight modifications. Only oxalate-soluble fraction which was submitted to consecutive treatments of purification as described previously was considered (Leitao et al., 1995). 

B. Frenzel, Ziir Atiologie der Anrcicherung von Animosarum und Amiden im Wurzelraum von Helianthus annus. Planta. 55 169 (I960). 

SULTANA Jmpatiens sultani Hook) SUNFLOWER Helianthus annus L.) SWEETCUM Liquidambar styraciflua L.) SYCAMORE Pkuanus occidentalis L.)... 

Enzymic hydrolysis can often provide the means for solving a problem involving the partial hydrolysis of esters. A synthesis145 of 1-O-ab-scisoyl-/3-D-glucopyranose proved difficult at the last step, but the use of a crude enzyme-preparation obtained from ripe seeds of Helianthus annus allowed deacetylation to be achieved at 0-2, 3, 4, and 6 of the D-glucosyl group without rupture of the ester bond to the anomeric center. 

Sabui, S.K. and Venkateswaran, R.V. (2004) Synthesis of heliannuol D, an allelochemical from Helianthus annus. Tetrahedron Letters, 45, 983—985. 

Sunflower seed oil is obtained from Helianthus annus grown mainly in the USSR, Argentina, Western and Eastern Europe, China, and the United States. The oil normally contains 60-75% of linoleic acid, >90% of oleic and linoleic acids combined, and virtually no linolenic acid. Its major triacylglycerols are typically LLL (14%), LLO (39%), LLS (14%), LOO (19%), LOS (11%), and other (3%). 

The PhEur 2005 describes sunflower oil as the refined fatty oil obtained from the seeds of Helianthus annus C. by mechanical expression or by extraction. A suitable antioxidant may be added. 

Sunflower oil is obtained from the fruits and seeds (achenes) of the sunflower, Helianthus annus (Compositae), by mechanical... 

Several plant aspartate kinases are activated by other amino acids such as valine, alanine, and isoleucine (Table HI). Activation does not appear to be a general effect of hydrophobic amino acids, since neither methionine nor leucine influence the activity of the maize enzyme yet, leucine has been reported to activate the enzyme isolated from Sinapsis alba and inhibit the enzyme from Helianthus annus. Interaction of these secondary effectors with the various aspartate kinases has not been fully explored, but several observations suggest a considerable degree of complexity. Alanine partially relieves threonine inhibition of the enzyme isolated from pea seedlings (Aames and Rognes, 1974). Lysine inhibition of maize aspartokinase is diminished in the presence of isoleucine, alanine, or valine (Bryan e/ al., 1970) and threonine, even though it does not inhibit the maize enzyme, counteracts... 

Sunflower oil - flau(-3)r n. Seed oil of Helianthus annus, which grows in abundance in many parts of the world. It can only be regarded as a semidrying oil, but has the useful property of being nonyellowing. Sp gr, 0.930/15°C iodine value, 135. 

Weerdenburg C A, Peterson C A 1984 Effect of secondary growth on the conformation and permeability of the endodermis of broad bean Vida faba), sunflower Helianthus annus), and garden balsam Impatiens balsamina). Can J Bot 62 907-910... 

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